EASERGY T300 - Association of Municipal Electricity Utilities Hope/12-1 Easergy T3000... · SCADA / DMS Other services The distribution network becomes a Smart Grid communication

EASERGY T300A modern approach to distribution network automation

Confidential Property of Schneider Electric

Gideon Ferreira

Schneider Electric. All rights reserved

Easergy T300 Presentation

a compact and modular design for all

customer applications

an up to date communication for customer

future proof systems

a modern solution entirely designed to make

easier the installation, commissioning and

maintenance

Simple

a concentrate of innovation dedicated to customer

performance

Powerful

Flexible

Connected

to secure all control and data acquisition for

the operation of customer electric system

Secure

Easergy T300, Customer Values



Easy customization thanks to modern

architecture, scalability, and simple on-site

upgradability

Compliant with the latest standards, with local

or remote maintenance (IEC61850-90-5,

Ready for 4G)

Installation (Wireless and self-powered

sensors), commissioning, and maintenance

made easier (Web Server)

SimpleAdvanced features (Native IEC61850), enabling

powerful monitoring (IEC61557-12 & IEC61000-4-30),

control, and automation functions (IEC61131-3

framework)

Powerful

Flexible

Connected

Compliant with the latest cyber security

standards and regulations (IEEE P1686,

IEC62351)

Secure

Easergy T300, Offer values

Page 4Confidential Property of Schneider Electric |

1Answer the challenges of today.

And tomorrow

2 Easergy T300

3 Ordering

4 Cyber Security

5 Technical description



The traditional grid

Electrical

utilities

The modern grid

vs.

Electrical

utilities

Renewables

Distributed

Generation

As network complexity grows, so does the need

for a better network management

Electrical utilities

Having the right

Feeder RTU is key

MV network control

MV Fault Detection

Centralized or decentralized

network reconfiguration

MV Volt/VAR optimization

support

LV network management and

Volt/VAR support

MDM(Mobile

device

Managemen

t) / AMM

Network control centre

SCADA / DMSOther services

The distribution network becomes a Smart Grid communication node

HV/MV

MV/LV

Easergy

T300

Easergy

HU250

Easergy

SC150

Easergy

LV150

Easergy

LV110

Easergy

PS50

Easergy

PS25

A modular solution… for any secondary distribution application


Easergy PS50

Communicating power supply designed for

control and monitoring of the entire

substation

> Dedicated supplies for switchgear motor,

electronic

and communication devices

> Designed to continue monitoring during

long outages or interruptions

> Complete battery management with

periodic testing and lifetime estimations.

Easergy LV150 & Easergy LV110 (*)

Easy to install and operate LV network

management (*)

> Complete power measurement to IEC 61557-12

> Power quality monitoring to IEC 61000-4-30 Class

S

> Transformer temperature monitoring*

> New LV applications such Fuse Blown and

Broken Conductor detection*

Easergy SC150

Compact unit with complete functionality for all MV

line and switchgear management

> Switchgear remote control and monitoring

> Advanced fault detection that now includes

Distributed Generation

> Complete power measurement (IEC 61557-12) (*)

> Power quality monitoring (IEC-61000-4-30 Class S)

(*)

> Standardized data model to IEC 61850

> Embedded operator interface for complete local

operation

> Open to any standard of VTs, Low Power VTs, and

CTs

Easergy HU250

Head Unit with every advanced Feeder

RTU function

> Secure remote connectivity to any

SCADA

> Support for all standard communication

media

> Support for all standard protocols

> Secure Wi-Fi connectivity

> Web server for easy configuration and

maintenance

> Third-party substation device integration

MDM / AMM

Other services

Network

control

SCADA / DMS

* Consult us for availability

Easergy HU250 Easergy SC150 Easergy LV150 (*)

Easergy LV110( *)

Easergy PS50

Modular, modern Feeder Automation



Flexible and scalable architectures

Scalable solution on-siteo Just one click and one eth jumper!

o Wireless and self-powered power meter for LV

feeder

Open to 3rd party deviceso Power supply

o IED

o Sensors

Up to 24 modules

Wireless LV

current sensors

Eth

jumper

Flexibility built ino Modular architecture modulo one

o DIN mounting

o Simple Ethernet bus via jumper



A powerful Easergy Feeder RTU configurable to your exact needs

Packaged solutions

• Complete packaged

solutions available off-

the-shelf for fast delivery

and installation

• Also available for

retrofit

Delliver with MV cubbicle

• Easergy T300 can be

delivered ready to use

with the Schneider MV

cubicle.

• Reduced installation

time on-site

Open solutions

• Completely tailored and

configured solutions to

serve advanced network

architectures

• Designed and configured

to your exact need

Common Modules, applicable for any configuration, with plug&play connectivity



Easergy T300 and Cyber Security

MDM / AMM Other services Network control centre

SCADA / DMS



RBAC Roles Suggested by IEC 62351-8

Smart RMU for grid management

Presented by: Gideon Ferreira


Smart RMU with flexible integration

Confidential Property of Schneider Electric |

Easergy T300

FBXRM6 Ringmaster

RMURTU

PanelModules for a

flexible integration

LPVT

Sensors

CTVPIS/VDS

• Take profit of the installed

base and Schneider Electric

leadership worldwide

• RMU metal-enclosed, indoor/outdoor

associated to a RTU ready to use

• Delivered and guaranteed as a

tested, validated, and documented

solution to guaranteed interoperability

Easergy T300 typical applications


V1-2 – 2016-07


1 MV control & automation

2 Volt Var optimization support

3 MV current fault detection

4 MV & LV Broken conductor detection

5 Load monitoring

6 Utility interface for DG

Distribution network applications


MV control & automation

FLISR : Fault location, isolation and service restoration

Customer challenges

Ensure Network Availability: Improve SAIDI(System Average

Interruption Duration Index)

Integrate distributed production on MV & LV sides

Manage energy growth with quality and efficiency

Optimizing assets & reducing field site visits

What is our solution ? Remote control of 20% of the MV/LV substations and remote

monitoring in the other ones

Having the right Feeder RTU to improve SAIDI

Benefits

Detect the MV faults, broken conductors and voltage loss

Reconfigure the network automatically after a fault detection,

with standard communication protocols and local automatisms.

Detect the LV outage (including blown fuse)

Comprehensive measured values to monitor the load of

distribution network

Small, modular, and rugged to be embedded on the switchgears

1 X Head Unit

communication

gateway

(HU250)

IEC 101/104,

DNP3…

GPRS, 3G,

radio, PSTN

Network control

SCADA / DMS

N X Switch Controller,

(SC150) monitoring and FPI

N=number of feeders

1 X LV Management

(LV150)

1 X Power Supply

(PS50)

M

MV/LV Substation Control

LBS controller


Priority area to equip with a controlled versus monitored Substation depend on the location of

the substation and the Smart Grid abilities. I.e.

1- rural location on a radial robust network distributing few customers may includes a local monitoring

without digital communication.

2- location with distribution production with voltage fluctuation on LV may have a remote monitoring

abilities

3- location with open ring meshed network may have remote control of 20% of the MV/LV

substations and additional 20% with remote monitoring.

4- Peer-to-peer communication with self healing abilities is dedicated to critical area which then

dramatically reduces the isolation and service restoration time. This is a smart, cost-effective way to

enhance the reliability of underground electrical distribution, simple roll-out, with no DMS required.

Architecture choice …

Architecture Smart Grid abilities

N°1 - No digital communication • Manage voltage , Fault indication , but limited

• integrate distributed production on LV side

• optimize assets

N°2 -Digital communication with remote Monitoring • integrate distributed production on MV & LV sides

• manage energy growth with quality and efficiency

• Optimize assets & reduce field site visits

N°3 -Digital communication with remote Control • Ensure Network Availability: Improve SAIDI

N°4 Peer-to-peer communications • Avoid unwanted islanding

• Self healing capabilities

1

2

3

remote control and monitoring

Decentralized peer-to-peer com.

Fault detection: Easergy T300 detects the MV fault whatever the grounding

system is, thanks to dedicated cost effective current and voltage sensors. These

sensors doesn’t need to have the same capabilities has protection relays but are

designed for a fast and easy installation on existing substations. Permanent faults

alarm the DMS to better localize the faulty part of the network. Transient faults are

logged to identify the weak lines.

Remote control: Fault location, isolation and supply restoration (FLISR) centrally

and remotely manages all T300 located on the feeders, with the objective of

isolating the faulty section, and restoring power to a maximum number of grid users.

To ensure robust, reliable remote control of the MV network, the T300 have to meet

a high level of electromagnetic compatibility immunity (EMC standards) that

traditional industrial controllers do not reach .The smart power supply of the T300 is

both to communicate and to operate the switches remotely during outage. Having

the capability to monitor and test the health of the local battery and the battery

charger contributes to reaching SAIDI(System Average Interruption Duration Index)

objectives and to reduce battery maintenance costs.

Broken conductors including blown fuses detection are automatically detected

thanks to MV and LV voltage measurement.

LV monitoring detects quickly the LV outages and compute SAIDI or others key

performance indicators.

Ensure Network Availability

Rate of users not affected by an outage …

- without Feeder automation

- with FPIs

- with Remote control


Easergy T300 configuration is flexible to create a smart MV/LV

substation application. Pre-configuration may be adapted and

downloaded for large number of homogeneous devices.

Main applications …

Typical Configuration Functions

1-MV/LV switching

substation

1 HU 250 – 7 SC150 - 1

PS100

• incomer and feeder remote control &

monitoring

• protection relay and FPI monitoring

• substation power supply (protections, PM)

• sectionalizer automatism of OH feeders

• Auto Transfer Source of incomers, coupling

2- Ring Main Unit, kiosk,

Chamber substation

1 HU 250 – 2 SC150 - 1 PS50

• incomer remote control

• incomer FPI

3- MV/LV distribution

substation

1 HU 250 – 4 SC150 - 1 PS50

- 1 LV150


monitoring

•sectionalizer automatism of OH feeders

• Transfo monitoring

4- Pole mounted controller

1 HU 250 – 1 SC150 - 1 PS50

• LBS or CAP remote control & monitoring

• sectionalizer automatism

• Transfo monitoring

5- MV/LV consumer (opt.

double incomer)

1 HU 250 – 2 SC150 - 1 PS50


monitoring

•Auto Transfer Source of incomers

1

2

3

5

Pole mounted

controller 4

Preferred architectures to remote control the MV/LV substation

MV/LV substation

Monitoring

application


SCADA / DMS

Benefits : thanks to 1xHU250,3xSC150,1xLV150,1xPS50 and

wireless LV150 sensors this solution adds a powerful

monitoring of LV feeders and transformer and multiple access

to other services.

Remote control & monitoring

MV/LV substation


SCADA / DMS

Benefits : thanks to 1xHU250,2xSC150,1xPS25 this solution

monitors the Fault Passage Indicators and the loads of the

feeders.

MV/LV substation


SCADA / DMS

Benefits : thanks to 1xHU250,3xSC150,1xPS50 this solution

controls the MV feeders and monitors the FPI, the MV load

flow and VoltVAR functions of the SCADA / DMS

Basic monitoring

IEC 60870-5-104,

DNP3, MODBUS

Radio, PSTN, GSM,

GPRS/3G, ADSL

IEC 60870-5-104,

DNP3, MODBUS

Radio, PSTN, GSM,

GPRS/3G, ADSL

IEC 60870-5-104,

DNP3, MODBUS

Radio, PSTN, GSM,

GPRS/3G, ADSL

Smart substation

Remote access to the

embedded Web serverRemote access to the

embedded Web server

Remote access to the

embedded Web server


Easergy T300 connection with a 3rd party switchgear is easily achieved

due to dedicated options like split CT sensors, control interface with the

switchgear motorization, voltage sensors … It has been pre-engineered with

most of the existing MV switchgears.

Factory-tested solution

A solution that has been standardized, industrialized, and fully factory-tested

beforehand saves commissioning time, reduces the number of voltage

outages during installation, and is flexible enough to accommodate future

network development. One interesting aspect is that such an approach may

also apply to existing substations, retrofitting them to open a new field of

smart applications.

Embedded Application Workbench with powerful and intuitive graphical and

textual editors for IEC 601131-3 automation design allows to customize the

customer needs. The main factory-tested solutions are listed in the following

slides.

Typical automation solutions

FLISR

Fault location, isolation and supply restoration (FLISR) centrally and remotely

manages all smart devices located on the feeders, with the objective of

locating faults accurately and quickly, isolating the faulty section, and

restoring power to a maximum number of grid users.

Centralized automation

NO

Fault occurrence with over current

- FPIs memorises the fault current

- upstream protection opens

Isolation faulty circuits remotely

Restore supply remotely

Manual isolation of the faulty section

Restore supply to all customers remotely

Local AutomaticTransfer Source ATS *

An ATS system allows a critical load (such as a network section, a hospital or

plant) to have increased supply availability by switching between a primary and a

backup supply upon voltage failure conditions.

• Automatically transfers between alternate supplies if one is lost

• Can be set to automatically reconfigure when the preferred supply is restored

•Can compute a busbar coupling switch (Bus Tie coupling)

Distributed Automatic Transfer Source *

The principle is the same as local ATS with a peer-to-peer communication

between two distant underground substations or overhead LBS.

Automatic transfert source

(* )consult us for availability

Sectionalizer

Due to their higher vulnerability, a self-healing solution for overhead lines that uses a combination of reclosers and LBS would

be recommended. Sectionalizer of the T300 controls a LBS (Load Break Switch) installed downstream of a MV overhead feeder

protected by a recloser. It counts the number of fault current (corresponding to the cycles of the recloser), and it opens when a

preset number has been reached. Selectivity can thus be obtained by installing several sectionalisers in series on a MV feeder.

Repartition of sectionalizers and reclosers

60% - 70% of faults are of a transient (temporary) nature :

Conductors clashing in the wind, tree branches falling on

overhead conductors, animals or birds, lightning strikes.

An autoreclose cycle should clear the fault.

Some are more permanent : Careless motor vehicle drivers,

operating error: leaving grounds connected, etc.

A lockout (no further recloser operation) of the faulted

section: operator intervention required.

Automation with overhead lines


Loop automation

Traditionally the so called loop automation solution that uses recloser

cycles and delays to reclose the ring on the tie point allows for isolating

the fault and reconfiguring the ring without any communication between

controllers.

A new self-healing solution has been successfully deployed using some

short communication bandwidth between feeder RTUs to better manage

the grading system of reclosers and to reduce the stress of the lines by

eliminating unnecessary re-energisation of faults.

Decentralized self healing system

Substation

CB’s

10km15km

10km

7.5km

Midpoint

4

Midpoint

3

2D

Feeder 2

2B

10km

2A

1A

Midpoint

2 7.5km

1D

1B

7.5km

Feeder 1

2C

1C

5km

B

•Fault isolated

•Power restored to unfaulted sections in less than 1 minute

•No operator intervention

•Alternate source prevented from Closing onto fault

Close

dTrippe

d

Switchgea

r

LiveDead

Line

Modbus Trip Request

Tie

Modbus Close Request

Midpoint

1 B+SS

BB+SS

Example of self healing system

Real case of Self-healing in Vietnam Brazil

and Australia …






5 Load monitoring


Easergy T300 typical

applications


Volt-VAR optimization support

Volt-VAR control, MV monitoring, Load management

Customer challenges

Improving quality of service : distributed energy generation

needs to reinforces the network stability

Managing voltage: Voltage level increase due to in-feed, over

the limits for some end users

Better balancing MV feeder loads

Defer new distribution substation construction

What is our solution ?

Volt-VAR management support, thanks to accurate Voltage

measurement cl0.5 full chain & 1ms time synchro. & record files

according to & IEC61000-4-30 class S)

Energy quality deliver, 4 quadrants (IEC61557-12)

Smart sensors

Benefits

Feed the VVO function (Volt VAR optimization) of the DMS

Allow distributed regulation of voltage

Optimize the DER (distributed energy resources) extension of

distribution network

Detect unbalanced networks

Network control

SCADA / DMS

1 X MV Management (SC150)

U, I, P, Q measurement

Recording

1 X Head Unit

communication

gateway (HU250)

IEC 101/104,

DNP3…

GPRS, 3G,4G,

radio, PSTN

Power supply

(PS25)


Volt-VAR control solutions (1/2)

EOL

+

Meteo forecast

Cons/prod Load profiles

SS real-time measures

PS real-time mesures

Vopt AVR controller

Cap bankEOL

Vopt

ADMS

MV End of Line monitoring

• End of line (EOL) monitoring device supports Volt-VAR control and optimization, participating to a centralized or

decentralized system.

• In most of cases, existing smart meters are not adapted to support the voltage regulation because of real time

communication issue, compute missing like the sliding average over few minutes. A dedicated EOL device would be

recommended, with optimized communication with either the SCADA or the OLTC(On-load Tap Changer) regulator.

• From 1 to 3 EOL installed on each weak feeders will provide a synchronized Voltage information. It allows to check

and optimize the complete voltage plan of the MV feeder.

EOL

SS real-time measures

PS real-time mesures

AVR controller

///

Decentralized Volt-VAR control (closed

loop on a local area)Centralized Volt -VAR control with ADMS

VVO

Real case study : The ADMS takes into consideration

Voltages at Primary Substation and also Voltages at other

substations to set the tap changer and to optimize the

location of the normally open point.

Optimal network reconfiguration

Better balancing the load flow by

optimizing the location of the normally

open point of the MV rings which

consequently reduce the technical

losses and limit the overload circuits.

Tap changer setting

Easergy T300 records days and

seasons voltage profiles for

recommendation of the best position for

the off-load tap changers, and then

increase PV integration rate, by

minimizing the voltage problems they

may cause to the grid.

Reactive energy analysis

It includes the monitoring and analysis

of the reactive energy that flows on MV

feeders for each of the phases and

feeders of the secondary substation. For

example, the T300 monitors and

controls the switched MV capacitor

banks. The results of these analysis

would allow to locate the areas of the

grid with more reactive energy. The

utility experts or the Schneider Electric

specialist would be able to work closely

with the utility team to come up with

several alternatives aiming at minimizing

the reactive energy impact on the

analyzed circuits.


Volt-VAR control solutions (2/2)

+1

+2

-1

- 2

High level of measurement accuracy is now required by Utilities and provided by

Easergy T300 for different raisons.

• Manage voltage limits: Energy suppliers have to guarantee the supply voltage

within the tolerance limits, +/- 10% (EN 50160) which allows a margin of +/- 5% on

MV feeders then the voltage regulation is done within a 1%, which consequently

requires 0.5% measurements to maintain quality and deliver MV and LV stability.

• Improve the quality of service: Electrical values such as current, voltage,

frequency, power, harmonics are performed according to the power quality standard

IEC 61000-4-30 Class S. Measured values can be recorded at synchronous time

intervals on the device or through the communication interface. Long-time recorded

data and events may be evaluated directly in the device according to the power

quality standards, and issued as a report.

• Monitor the stability : alarming on frequency shift of a disconnected area

(microgrid area), alarming on overloading area, etc.

Volt VAR management of the LV network (versus LV) is less critical because it

affects a fewer number of end users. It’s why Utilities prefer to first manage the MV

network (For LV networks, go to the § “Load monitoring application”). However, MV

sensors are sometime difficult to install, particularly the Voltage sensors (see

recommendations on the next table). Consequently, LV voltage measurement are

chosen instead of MV, which may provide a valuable 2% measurement, taking into

account the characteristic of the MV/LV transformer (load, PF, tap position).

Voltage measurement accuracy is needed

RTU functions required for Volt-VAR

• I, U and % unbalanced, accuracy 0.5%

• P,Q, PF, signed accuracy 1%

• Energy, frequency monitoring

• IEC 61000-4-30 class S

• harmonics (H15), voltage dip and swell

• demand value: averages on 1 to 60 mn

• data recording : periodic, dead band, on

threshold

• alarms

• Synchronization of RTUs using

communication protocol (10 ms)

Choice of sensors for Volt-VAR

Smart sensors Features Recommendations

MV current sensor - Split core CTs for an easy installation on MV

unipolar cables with SC150

- dedicated to Fault passage indication

- dedicated to measurement (IEC 60044-1 Class 1)

: phase RMS, residual, P, Q ..

-To be installed on each MV incomers

- may be installed on others MV feeders for Transfo monitoring

- for tripolar cables, only split core balanced CT are suitable, or a

specific shielding must be adapted after the split point.

MV voltage sensor : LPVT -LPVT (Low Power VTs)

- dedicated to measurement for Volt-VAR

application (IEC 60044-7 -Class 0.5)

-Preferred solution for MV End of line monitoring in case of “T”

bushing


VT - Standard MV/LV VTs with secondary from 57V to

220 Vac according to IEC 60044-2

-dedicated to Tariff metering

- VT is the traditional solution for Voltage measurement of main

substation. However, it could be difficult to install it on some type

of MV/LV substations (foot print, cost, robustness issue, GIS MV

cubicle …) and LPVT would be a preferred solution.






5 Load monitoring



applications


MV current fault detection

Fault Passage Indicator (FPI)

Customer challenges

Distributed Generation are increasing and Fault passage

indicators are not working anymore properly .

Peterson earthing system limits the earth faults and FPIs

don’t detect properly all the faults.

Utilities are not confident on their FPI assets.


Advanced FPI functions (directional fault detection,etc.)

Easy configuration thanks to Web Server or IEC61850 data

model

Easy connection with CT, VT, LPVT, VPIS…

Benefits

Detect the faults of all earthing systems

Detect the faults with distributed generation

Detect the MV broken lines

Detect Voltage outage including MV blown fuse

Network control

SCADA / DMS

2 X FPI

(SC150)

M

1 X Head Unit

HU250

communication

gateway

IEC 101/104,

DNP3…

GPRS, 3G,

radio, PSTN

Power supply

PS25

Network control

SCADA / DMS

MV/LV Substation Control

LBS controller

Choice of sensors for FPI

Smart sensors Features Recommendations

MV current sensor - Split core CTs for an easy installation on MV

unipolar cables with SC150


- dedicated to measurement (IEC 60044-1 Class 1)

: phase RMS, residual, P, Q ..


- may be installed on others MV feeders for Transfo monitoring

- for tripolar cables, only split core balanced CT are suitable, or a

specific shielding must be adapted after the split point.

MV voltage using capacitor

interfaces: VPIS-VDS-PPACS

-The SC150 is connected to VPIS -VO or VDS

or directly to external capacitor divider connected

to the MV head cable and MV bushings(PPACS)

- dedicated to Fault passage indication (ANSI

67,67N) and Broken connector detection (ANSI

47, 59N)

-voltage measurement accuracy depend on the capacitor divider .

Calibration may be set in the T300 to improve the measurement

(Class 2)

- installation may be complex for 3rd party MV cubicle

MV voltage measured from LV

input down the MV/LV

transformer

- dedicated to Fault passage indication (ANSI

67,67N) and Broken connector detection (ANSI

47, 59N)

- MV voltage may be calculated by SC150 from LV , using the

MV/LV transformer characteristics . It provides an easy solution to

insure Volt VAR measurement with no extra costs. However LV

loads may reduce the accuracy of the measurement (from 2%)

due to the fact that the transformer has a nonlinear response.






5 Load monitoring



applications


Broken conductor detection

Fault location

Customer challenges

In some cases of overhead networks, the broken lines

cannot be detected by the protection relays of the main

substation

Hazardous area appears without alerting


Easergy T300 measures the voltage and then detects the

MV broken line or the MV blown fuse

negative sequence overvoltage function (ANSI 47)

Zero phase sequence overvoltage function (ANSI 59N) for

isolated nearthing system

Benefits

Enhanced personal safety thanks to broken conductors

detection

Detect the MV broken lines

Detect Voltage outage including MV blown fuse

1 X Head Unit

communication

gateway (HU250)

IEC 101/104,

DNP3…

GPRS, 3G, radio,

PSTN

Network control

SCADA / DMS

1 X MV Management

(SC150),, U, I, P, Q

measurement

P47 detection

Broken overhead

phase line

Broken

overhead

connector

MV Blown fuse

Power supply

(PS25)


Location of the broken conductorUnlike FPIs, the broken conductor is detected by the downstream T300

NO

Fault occurrence with over current

- FPIs memorises the passage of fault current


Fault occurrence with directional FPI

- FPIs memorises the way of fault current


Broken conductor occurrence

- T300 memorises the upstream voltage issue

- upstream protection doesn’t open






5 Load monitoring



applications


Load monitoring

MV monitoring, LV monitoring, load management, losses reduction

Customer challenges

Reduce both technical and non- technical losses

Manage energy growth with right level of quality and efficiency :

Deliver MV and LV stability

Optimize investments

Manage load

Reduce transformer fault and extend life

• Easergy T300 measures the loads on MV and LV feeders with a

modular approach

• Manage local automation: alarms, load shedding, peak shaving

• Customizable, cloud based set of services


Benefits Measure the power and energy on the network thanks to

accurate sensors and according to IEC 61557-12

Support the load shedding and peak shaving by automation

Measure historical for a better load flow calculation

Reduce transformer fault and extend life (ageing analysis via

temperature & load)

Head Unit

communication

gateway (HU250)

IEC 101/104,

DNP3…

GPRS, 3G, radio,

PSTN

Load flow

SCADA / DMS

1 X MV monitoring

(SC150)

1 X LV

Monitoring

(LV150)

M

Load Management

Monitoring Application

SFTP over

WAN

Power supply

PS25

Better balancing the MV load flow by optimizing the location of the Normally open point

of the MV rings which consequently reduce the technical losses and limit the overload

circuits.

Optimize assets and reduce field site visits: More accurate information about asset

behavior enables utilities to not only reduce the number of costly field maintenance visits

but also more proactively keep equipment operating efficiently.

MV/LV Transformer Stress Assessment

This service allows to analyze the load of the transformer during a long period for an

optimized solution : transformer replacement, load flow optimization, temperature

monitoring, broken MV fuse detection.

Tap changer setting

Easergy T300 records days and seasons voltage profiles for recommendation of the best

position for the off-load tap changers, and then increase PV integration rate, by minimizing

the voltage problems they may cause to the grid.

MV load management

Real case study : The ADMS takes into consideration

Voltages at Primary Substation and also Voltages at

other substations to set the tap changer and to

optimize the location of the normally open point.

+1

+2

-1

- 2

LV unbalances management

The LV ends of distribution networks are often heavily unbalanced between

transformers, between LV feeders within a transformer, and between the three

phases of one given transformer. With the massive injection of distribution

energy resources (e.g., photovoltaic panels), these imbalances are amplified.

These imbalances cause joules losses in wires and transformers due to the

higher current level on the more heavily loaded part of the network and to

current flow in neutral wires that were usually not designed for such a

situation.

The T300 connected to wireless LV sensors on each feeders is able to identify

imbalances on LV feeders in real time (every 10 minutes, on average) and

solve LV phase balancing.

Reactive energy analysis

The service includes the monitoring and analysis of the reactive energy that

flows for each of the phases and feeders of the secondary substation. The

results of these analysis would allow to locate the areas of the LV grid with

more reactive energy. The utility experts or the Schneider Electric specialist

would be able to work closely with the utility personnel to come up with several

alternatives aiming at minimizing the reactive energy impact on the analyzed

LV segments.

LV load management

Transformer overload due to unexpected

phase unbalance

Non- technical and technical losses

The T300 connected to wireless LV sensors on each feeders is able to calculate

imbalances on LV feeders in real time (every 10 minutes, on average) and solve LV phase

balancing to reduce technical losses.

Aggregated measurement may also help detect non-technical losses at the feeder level.

Easergy T300 records measurements and downloads to a service platform .

This service allows to asses the imbalance per LV feeder, per phases and to produce

recommendations for an optimized solution : transformer replacement, rebalancing action

of some loads …

Compared to the time-stamped Energy of Smart Meters, an analyze may be done by the

DSO or proposed as a service by Schneider Electric, to identify the losses.

Losses identification

Overload due to unexpected imbalance

Wrong energy balance by feeder and losses identification

Schneider Electric monitoring platform may help DSO to analyze

the data and to provide Audit reports and Dashboards. A service

offer, relying on a set of technological bricks, compute data coming

from Easergy T300 but also from existing data (GIS, metering …)

and provide a fast result with a limited investment for the utilities : no

need to manage additional IT infrastructure and counting on the

expertise and analytic procedures obtained by years of intensive

R&D efforts on LV grids

Example of operative model deployed in 3 months:

Choose a set of secondary substations to be investigated.

Deployment of sensors on each secondary substation (no interruption of the

supply, installation in less than 30 min per substation)

One sensor per LV feeder to measure currents.

One T300 per secondary substation to measure voltage, make calculations and

send the data to the Schneider Electric LV-cloud Platform

The data would be collected for a limited period of time (typically about 2-3

months).

If required by the requested services, loading additional data provided by the

utility (from AMI, GIS, etc.) into the Schneider Electric LV-cloud Platform

Schneider Electric specialists would analyze all the collected data :a report per

secondary substation would be provided to the utility with remarkable findings

and recommendations to improve the critical issues found out.

Customizable, cloud based set of services

‒ On live installations

‒ No interruption of the supply

‒ ZigBee communication

‒ In less than 30 minutes per

substation

Page 86Confidential Property of Schneider Electric | Page 86Confidential Property of Schneider Electric |

Schneider Electric

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Load ManagementMonitoring Application

High level of measurement accuracy is now required by Utilities and provided

by Easergy T300 for the same about the same raisons as Volt-VAR.

• Monitor the voltage limits: Energy suppliers have to guarantee the supply

voltage within the tolerance limits, +/- 10% (EN 50160) which consequently

requires 0.5% measurements to maintain quality and deliver MV and LV

stability.

• Improve the quality of service: Electrical values such as current, voltage,

frequency, power, harmonics are performed according to the power quality

standard IEC 61000-4-30 Class S. Measured values can be recorded at

synchronous time intervals on the device or through the communication

interface. Long-time recorded data and events may be evaluated directly in

the device according to the power quality standards, and issued as a report.

• Monitor the stability : alarming on frequency shift of a disconnected area

(microgrid area), alarming on overloading area, etc.

Monitoring the LV network is more and more critical because distributed

generators like photovoltaic panels affects the LV distribution network which

consequently needs to be monitored.

Load monitoring needs accurate measurement

RTU functions required for load monitoring

• I, U and % unbalanced, accuracy 0.5%

• P,Q, PF, signed accuracy 1%

• Energy, frequency monitoring

• IEC 61000-4-30 class S

• harmonics (H15), voltage dip and swell

• demand value: averages on 1 to 60 mn

• data recording : periodic, dead band, on

threshold

• alarms

• Synchronization of RTUs using communication

protocol (10 ms)

Choice of sensors for Load monitoringSmart sensors Features Recommendations

MV current sensor - Split core CTs for an easy installation on MV unipolar

cables with SC150


- dedicated to measurement (IEC 60044-1 Class 1) :

phase RMS, residual, P, Q ..


- may be installed on others MV feeders for Transfo

monitoring

- for tripolar cables, only split core balanced CT are suitable, or

a specific shielding must be adapted after the split point.

MV voltage sensor : LPVT -LPVT (Low Power VTs)

- dedicated to measurement for Volt-VAR application

(IEC 60044-7 -Class 0.5)

-Preferred solution for MV End of line monitoring in case of

“T” bushing


MV voltage using capacitor

interfaces: VPIS-VDS-PPACS

-The SC150 is connected to VPIS -VO or VDS or

directly to external capacitor divider connected to the

MV head cable and MV bushings(PPACS)

- dedicated to Fault passage indication (ANSI 67,67N)

and Broken connector detection (ANSI 47, 59N)

-voltage measurement accuracy depend on the capacitor

divider . Calibration may be set in the T300 to improve the

measurement (Class 2)

- installation may be complex for 3rd party MV cubicle

MV voltage measured from LV

input down the MV/LV

transformer

- dedicated to Fault passage indication (ANSI 67,67N)

and Broken connector detection (ANSI 47, 59N)

- MV voltage may be calculated by SC150 from LV , using

the MV/LV transformer characteristics . It provides an easy

solution to insure Volt VAR measurement with no extra costs.

However LV loads may reduce the accuracy of the

measurement (from 2%) due to the fact that the transformer

has a nonlinear response.

LV enery sensor

(for each LV feeders)

- LV110 use power harvesting technology, based on

current sensors

-Wireless communication with LV150 based on ZigBee

PRO Green Power

- LV110 is synchronized with LV150 for power

measurement according to IEC 61557-12

- To be installed on LV feeders of substations facing to high

level of integration of photovoltaic energy , long lines, rural

network, ageing infrastructures.






5 Load monitoring



applications

Utility interface for Distributed Generation

Grid code monitoring, anti islanding

Customer challenges

Increasing renewable contributions to the network and the

system

Manage grid codes and enhance stability

Voltage rise

Unwanted islanding

What is our solution ? Easergy T300 is a dedicated interface to manage data exchange

between DSO and DG from 250 kW

Evolutive platform to allow future regulation functions

Peer to Peer communication

Ability to communicate with meters, protection and inverters

Benefits

Transmission of settings and controls (decoupling order for

unwanted islanding, curtailment, Power limitation during peak

loads, active and reactive power control modes… )

Monitoring of the production . Generation outputs to be

forecasted, Power quality levels to be reported

Easy connection with Tariff Meter, Protection relay or Power

Plant controller of the DG

DSO/TSO

Authority

1 X Head Unit communication gateway

IEC 101/104, DNP3, IEC61850…

GPRS, 3G, radio, PSTN

Network control

SCADA / DMS

DSO(Distribution

System Operators)/

TSO (Transmission

System Operators)

Balance forecast

Protection at the Point of

common coupling (PCC)Tariff

meter

Power plant

Controller (PPC)

IEC 61850, Modbus, Analogs I/O ..

<- Utility interface for DG

Unwanted islanding is where a distributed generator or a set of DGs continues to

power a portion of the grid when the connection to the main public electrical power

grid is no longer present. It is important to avoid unwanted islanding not only

because it may lead to safety hazards for utility field personnel but also because

DG units and network components may be damaged as a consequence of

unsynchronized reclosing of the islanded circuit, unregulated voltage and

frequency, overloaded DER(Distributed Energy Resources), and undefined

earthing. One effective way to avoid unwanted islanding involves communication

capabilities between components attached to a feeder. The principle is to control a

disconnection of DG(Direct Generation), using Easergy T300 communication

capabilities (Fig 1).

Network codes requirements. All power plants must be code compliant . With

rising shares of renewable electricity being injected onto their grid, system

operators are now realizing that the usual network codes designed initially for

conventional generation do not accommodate for the variable nature of renewable

power. New regulation functions need to be implemented: cosφ(P), cosφ(U),

Q(P)… More accurate and faster response times are required. Generation outputs

and Power quality levels have to be reported. Existing installations will have to be

upgraded to comply with grid codes. In Europe, the European Network of

Transmission System Operators for Electricity (ENTSO-E) is defining and

developing a common framework.

Renewable monitoring system is a module of EMS (Energy Management

System) of the TSO. Objectives are to limit TSO balancing needs, to monitor

and forecast power flows and to manage margins & risk situations.

For more information …

Weather data

EMS

DMS

Large farms only

French case : Renewable monitoring system is called IPES (lnsertion

de la Production Eolienne et photovoltaïque sur le Système)

Utility interface for DG

Interface for DGDMS Interface for DG

InhibitInhibit

Open

decoupling

Curtailment, Power limitation during

peak loads, active and reactive power

control modes

PS

Fig 1 Example of decoupling order for unwanted islanding in case of

fault on MV feeder – i.e. ENEL

THANK YOU.


Documents

EASERGY T300 - Association of Municipal Electricity Utilities Hope/12-1 Easergy T3000... · SCADA / DMS Other services The distribution network becomes a Smart Grid communication