7/27/2019 m720enbr Bb

1/9

Assess your level ofPower Quality

In this forever changing world, theEnergy Market in its evolution, hasdrawn new market players tradingin electricity.

Increased competitiveness of thePower Systems requires optimumtechnical and financial managementof the electrical installations. For thisreason, Power Quality assessment isone of the Key issues.

ALSTOMs MiCOM M720 PowerQuality Monitoring Solutions,provide coherent tools for:

Accurately defining the interfacesbetween the Energy Market

players, and Providing detailed informationused for network planning andplant optimisation.

Power Qualitymonitoring

Voltage characteristics and

planning levels

The quality profile of the electricalsupply is composed of a set of

parameters, defining the limits forboth frequency and duration of thesupply interruption, this is referredto as Voltage Characteristics, asdescribed in the relevant standardsor recommended practices such asIEEE 1159 , EN 50160, NRS 048.

Generally, only a percentage of theassessed values are taken intoaccount, (excluded from thecomputation is a percentage of worstcase measurements). This is the x%values found in most of the existingstandards (eg. 95% in EN 50160standard).

These rules are used to build upstandard contractual agreementsbetween the market players.

For network planning purposes, theutilities and the major consumersneed to monitor to stricter limits thanthe voltage characteristics, knownas Planning Levels. These areoperational limits and internalPower Quality targets of the utilities.

Major Industrial plants use thesestricter limits to measure the level ofPower Quality at common couplingpoints and close to the disturbing orsensitive loads, in order to find theoptimum plant design. This isincreasing the relevance of theinvestments allowing improvedimmunity at equipment level, ratherthan investing in wider unnecessaryrenovation programmes.

More specific legal agreementscan be monitored by using some ofthe planning level limits.

Report generation

Data becomes information

Considering the very high numberof measurements required, and thespecific algorithms involved, it isnecessary to transform PQ data intoPQ information. This is performedby advanced analysis tools giving

Power Quality reports directlylinked to the predefined orcustomised standards. Graphicalviews are produced such as 3D barcharts, Disdip table, occurrence ofvoltage dips/sags and interruptions,

2

MiCOM M720Power Quality Monitoring Solutions

in comparison to typical curves(eg. CBEMA/ITIC curve).

Yearly statistics of PQ data oftenrepresent over 1 Gb storage, whichrequire sophisticated Data BaseManagement tools. The layout ofthese reports can be producedusing predefined templates andmay include companies own logos.

MiCOM M720 and QRmanager

Power Quality monitoring

system

The MiCOM M720 is acomprehensive range of PowerQuality Meters, measuring the

electrical parameters defining thePower Quality profile of theNetwork. All the products within theM720 range perform continuousmonitoring of power atInterconnection locations.

MiCOM M721

Light industry and

distribution level

The MiCOM M721 is ideal for

monitoring the parameters quantifiedby the fixed Power Qualitystandards, including flicker and up to50th harmonic (40th for 60Hz).Limited configuration of setpoints isavailable with the M721 in order totake into account variations ofparameters of the standards.

7/27/2019 m720enbr Bb

2/93

MiCOM M722

Investigation in medium

industry and distribution level,

transformer technological

survey

The MiCOM M722 additionally,

monitors the inter-harmonics,allowing full configuration of thePower Quality profile in order tocarry out investigation of planninglevels over the distribution network.

While harmonics are present, themeasurement of the K-factor isuseful to monitor the derating of thetransformers caused by heating dueto the eddy current loss factor inthe transformers. The M722 is fittedwith a waveform capture function.

MiCOM M723

Heavy industry and sub-

transmission level

The MiCOM M723 provides asliding reference tracking capacityused at HV level, smoothing thevariations caused by the voltageregulation at transmission level.

Monitoring of the Inter-harmonics is

also provided. The M723 is morethan adequate to look into thePower Quality in heavy industryand on transmission networks. Itutilises the limited configurability ofthe Power Quality Profile.

MiCOM M724

The expert - comprehensive

investigation at planning

level and transmission level

The MiCOM M724 is designed forcomprehensive investigation ofparameters, taking into account thenetwork planning concerns.The Power Quality profilesinvestigated are fully configurable.This allows technical and financialconclusions to be made relevant tothe design of the network.Additionally, to help evaluate howclose the parameters are to thevalues required by the standards.Very short time power qualityparameters are stored for furtheranalysis. The M724 is the preferredtool of consulting and Engineeringcompanies, Utilities and Industrynetwork experts.

Associated software

QR Manager

QR Manager is a Power Qualityanalysis software, especiallydesigned, to manage the dataissued by MiCOM M720 PowerQuality Meters. A whole district can

thus be analysed, with aclassification of the events,topology-related. In addition to thestandard power quality profile,specific power quality reports canbe created, in accordance withcontractual commitments.

MiCOM M720: a comprehensive range

MiCOM M720 Range: M721, 722, 723, 724

Nb of channelsStorage T_very_short (3 sec)

Sampling Frequency

EN 50160 / IEEE 1159

Configurable Standards

Slow VariationsDips, InterruptionsFrequencyHarmonics (50) , THDSignalling voltagesFlicker (Pst)Unbalance RateInter-harmonics

HV Sliding Reference

K-Factor

MiCOMM721

MiCOMM722

MiCOMM723

MiCOMM724

RangeParameters

4 U/ 4 I 4 U/ 4 I 4 U/ 4 I 4 U/ 4 I

PQ

MO

NITO

RING

5 120Hz 5 120Hz 5 120Hz 5 120Hz

(2) (4) (8) (8)IEC 61000-4-7

IEC 61000-4-7

*50 Hz

*

G

G

G

G

G

Power Generation

IPPPower Generation

Steelworks

IPP

Secondary(rural)distributionRe-newable

sourcesIPP municipal

Co-generation

Light industry

Heavyindustry

Mediumindustry

Chemicalplant

Urbantransformers

LV Network

Domestic

HV slidingref required

INTERCONNECTION TRANSMISSION NETWORK

SUB TRANSMISSION

DISTRIBUTION

SECONDARY DISTRIBUTION

M724 M724 M724

M723 M723M723

M723

M722

M722

M722

M722M721

M722

M723

M721

M721

M722

Monitoring of the power quality

at different network levels

7/27/2019 m720enbr Bb

3/9

Discontinuous trend

Voltage dips Phases A-B-CIndices:

4

Power Quality reporting

While analysing the measurementscampaigns, it is possible to set foreach parameter, one or more thanone views to be included in thePower Quality reports to begenerated. The desired views arethen selected as to be integrated

in the report, and also customisedgraphical policies can be added tothe layout of the reports.

The possible views are :

List of Power Quality events Radar spot graphical

representation Time and trend curves Graphical 3D histogram Statistical analysis over the

assessment period PQ profile super-imposed (DISDIP

table, CBEMA/ITIC curve, ...)

Comments and electronic picturefiles can be added to all sections ofthe reports.

For universal data exchange, theformat of the reports is directlycompatible with WEB format (html,xml), and consequently, allows aneasy integration into Internet-basedQuality of Service monitoringapplications.

Filtered Power Qualityindices

A sharp analysis of the level ofPower Quality, may require filteredpower quality parameters, in orderto match specific contractualagreements. For these purposes, QRManager allows the creation ofnew indices, composed with filtersapplied to gross availableparameters. For example, it is

possible to create a special index,showing voltage dips, greater thana given duration. This index isgiven a new naming.

The possible filters are :

Multi-parameters views Lower/greater than Maximum, minimum value Mean value, quadratic average

value Ponderation factor Square root, squaring Equation, sum, integration filter Cumulated probability Flicker Plt calculation Week day/week-end filter

Power Quality Report

History of Voltage dips

Begin: Voltage dips Phases A-B-C

10/4/2000 16:0:0:0

10/4/2000 16:3:12:490

10/4/2000 16:10:0:0

10/4/2000 16:1:1:560

End: Voltage dips Phases A-B-C Index: Voltage dips Phases A-B-C

10/4/2000 16:0:0:190

10/4/2000 16:3:12:950

10/4/2000 16:10:0:630

10/4/2000 16:1:1:930

32.5% (pu) (190ms)

24.510% (pu) (460ms)

16.450% (pu) (630ms)

21.590% (pu) (370ms)

Dips_contract_1

Amplitude duration 600.0 - 999999.0

10.0 - 90.0 5

Base: Voltage dips Phases A-B-C

Voltage swells

History of the Power

Quality parameter

Live trend

Indices: H-UA-10-TvsMin: 2.532 Max: 7.125 Standard deviation: 0.901 Average: 4.356

Statistics over the

contractual period

Cumulated probability

Cumulated

probability

Count

Indices:H-UA-10-Tvs Min: 2.532 Max: 7.125 Standard deviation: 0.901

Variance : 0.811 Average: 2.532 Samples : 200.000 95% va lue: 5 .971

Graphical representation

of voltage dips

Discontinuous trend

Indices: Voltage swells Phases A-B-C

7/27/2019 m720enbr Bb

4/9

MiCOM S1 - QR Monitor

The settings of the MiCOM M720range can be performed by theMiCOM S1 setting software. Theviewer QR Monitor can display on-line all the parameters measured bythe instruments, displaying them indifferent folders. A specific folder is

dedicated to the spectrum analysis.The Power Quality events aredisplayed with the type of events,the time and date, the duration andthe value reached.

Functional characteristics

General

The MiCOM M720 acquires theVoltages and Currents of thenetwork and calculates in real timeall the parameters necessary to getan accurate picture of the PowerQuality of the network. Formonitoring purposes, additionalparameters are also provided,allowing to check on-line, the statusof the network. This data can bestored in the memory of theinstruments, and can be retrievedremotely, through a communicationlink. On some models, waveformand snapshot capture are alsoprovided.

On-line refreshment of the data canbe displayed by QR Monitor,showing different values andgraphics. Advanced data analysisis given by QR Manager, whichanalyses the Power Quality data,

sorting out the events per timeperiod, type of parameters, amountof occurrences and filtered PQsecondary indices.

Acquisition principle

The signals are acquired in order toprovide both Power Qualitymonitoring and monitoring

parameters. Voltage events: 1/2 cycle Acquisition windows: 200 ms FFT processing: 200 ms RMS values: filtered at 13th

harmonic Sampling rate: 5 120Hz Network: 50Hz or 60Hz Resolution: 14 bits

Integration time:

Different integration times are usedin the M720 range:

Very short time: default: 3 sec,programmable 1 s to 1 min

Short time: default: 10 min,programmable 1 min to 1 h

Long time: 2 hours measurement time for:

Frequency: 10 sec.Flicker: 10 min (Pst), 2 hours (Plt)Harmonics and inter-harmonics:3 sec, 10 min, 2 hours

Signalling voltages: 3 sec and10 mn

The results can be observed forperiods varying from 1 day to 1week or more.

5

Software Tools

M720

MiCOM S1 + QR Monitor

QR Manager

DistrictDatabase

Storage

Import

DataSettings

Settings

Data

PQ Viewer

PQ AnalysisPQ Reportgeneration

MiCOM S1Startup QR Monitor

QR Manager

Waveform and snapshot

capture:

Upon any event detected, awaveform or snapshot capture canbe performed:

pre-fault: 0.2 sec post-fault: 0 to 1 sec

Type of events:

Information given with each event:

Date and time Identification Current Value Maximum and Minimum value

reached during the event

For each event, it is possible toinhibit the quality parametersmeasurements (programmable).

Power Quality profile

Work Space 1

Configuration

Users managementuser1ope1

Alstom QRAnalyserNorthern District

Eastern Sub-DistrictNorthern Sub-District

10 kV63 kV90 kV

Petro ChemicalNorth City

Feeder 1PQ Meter1

PQ ProfilePQ Meter 2

Western Sub-District

90 kV90 kV

East City

Southern Sub-District

Southern District

My PQ Profile

Waveform capture:4U/4I

Snapshot capture:1 channel

M721 M722 M723 M724

7/27/2019 m720enbr Bb

5/96

Voltage thresholds: dips,

swells, interruptions,

variations

The MiCOM M720 range candetect events upon crossing of thefollowing thresholds with aprogrammable hysteresis:

Digital channel

Upon rising and/or change ofstatus of one of the 7 digitalchannels, an event can be

generated with a waveform orsnapshot capture (M722, M724).

Signalling voltages

The detection of signalling voltages:

3 phases 5 programmable frequencies:

50 TO 5000Hz, step 1Hz Events: programmable thresholds

and hysteresis

Harmonics and inter-

harmonics

IEC 61000-4-7

The Harmonics and inter-harmonicscan be detected: 50th (42 at 60Hz) voltage

harmonics 50th (42 at 60Hz) groups of

voltage inter-harmonics 50th (42 at 60Hz) current

harmonics 32 events: programmable

thresholds and hysteresis

THD:

The THD of the Harmonics V and Iand Inter-harmonics V is processed: Voltage THD: programmable

3 thresholds: low, medium, high;hysteresis

Voltage Inter-harmonic THD:TIHD: programmable3 thresholds: low, medium, high;hysteresis

Current THD: programmable3 thresholds: low, medium, high;hysteresis

9 events: 3 x 3 thresholds

Voltage unbalance:

1 event: 3 programmablethresholds: low, medium, high;hysteresis

Flicker: IEC 61000-4-15

Measurement of Pst (10 min),Plt (2 hours): analysis software,ith greater value of Pst

Frequency variation:

Measured on channel V1 Averaging over integration

period

K- Factor:

Derating factor of the transformerscaused by the eddy current losses

coming from current harmonics- given by the analysis software

Cyclic measurement:

Up to 32 simultaneousmeasurements can be stored in thememory including: Phase and Line rms voltages Negative sequence voltage Voltage unbalance Phase current, neutral current Active powers, reactive and

apparent power (derivedquantities) Power factors (derived quantities) Frequency Harmonics V, I

Storage capacity:

The memory can store: Very short time measurement

(only M724) Short time measurement Events Waveform and snapshot capture

(M722 and M724)

Event relay contact:

Activated when: Programmable: event detected

Time synchronisation:

Internal clock IRIG-B (option)

User interface

Front panel

The front panel comprises: A 2 x 16 characters back-lit LCD Four fixed function LEDs Four user programmable LEDs

customisable with labels 7 keys keyboard for menu

navigation and data entry An upper cover identifying the

product name. The cover may beraised to provide access to theproduct model number, serialnumber and ratings.

A lower cover concealing thefront RS232 port and batterycompartment. The front of theproduct can display the name ofthe product or any user definedname.

Battery for real time clock, andmemory buffer backup

Facility to implement a securitylead seal

Front port for local settings Firmware software update

through front panel (flash-ROM)

Communication interface

Front port:

Local Asynchronous Baud rate:

1200 to 19 200 bauds Protocol: ModBus

Rear port: RS485 Protocol:

ModBus IEC 60870-5-103*:- RS485- optical interface (option)

* Please consult us

M721 M722 M723 M724No. of thresholds

Nominal thresholds:Nominal highNominal lowInterruption

111

111

111

111

Overvoltage thresholds

Undervoltage thresholds

Programmable hysteresis

HV sliding reference

Configurable standards

2

4

9

19

2

4

9

19

1 - 9thresholds

1 - 19thresholds

Nom. High

Interruption

Nom. Low

Thresholds generating events on M720 Range

Number of events

M721 M722 M723 M724

2 4 8 8

Nb of channelsPhase voltage (Va, Vb, Vc)

Line voltage (Vab, Vbc, Vca)

Negative sequence voltage

Current (Ia, Ib, Ic)

Frequency

Harmonics V

Harmonics I

MiCOMM721

MiCOMM722

MiCOMM723

MiCOMM724

RangeParameters

4 U/ 4 I 4 U/ 4 I 4 U/ 4 I 4 U/ 4 I

* Derived quantity

MO

NITO

RING

Neutral currentActive power (Pa, Pb, Pc, PT)

Reactive power (Qa, Qb, Qc, QT)

Apparent power (Sa, Sb, Sc, ST)

Power factor (Pf1, Pf2, Pf3, PfT)

Waveform capture

* * * *

* * * *

* * * *

Storage memory (Mb)

M721 M722 M723 M724

1/2* 4/8* 8 8

*option

7/27/2019 m720enbr Bb

6/97

Technical data

Auxiliary power supply

Range:

48/125Vdc/115Vac 50/60Hz220/250Vdc/230Vac 50/60Hz

Variation: 20%

Power: 6W typ

Battery backup (option):

10 min backup

Inputs

Voltage: 4 channels

110Vac or 400Vac* Burden: 0.1VA

Current: 4 channels

Direct - 1A, 5A

Burden: 0.1VA, 0.5VA

Overload:

4 In continuous, 30In 10 sec.,100 In 1 sec.

Current probe: 0.61V

Bandwidth ( -3dB): 2500Hz

Digital: 7 channel range

48-150Vdc or 130-250Vdc

Consumption: 5mA or 3mA

Acquisition

Acquisition windows: 200ms

FFT processing: 200ms

RMS values: filtered at 13th

harmonic Network: 50Hz or 60Hz

Resolution: 14 bits

Sampling rate

M721: 5120HzM722: 5120HzM723: 5120HzM724: 5120Hz

Integration time

Very short time: TvsDefault: 3 sec., 1 sec. to 60 sec.step 1 sec.

Short time: T sec.

Default: 10 mn, 1 mn to 60 mnstep 1 mn

Long time: TI

Default: 2hours (analysissoftware)

Measurement range

Voltage: 0% - 160% Un

Current: 0% - 160% In

Frequency: 10% central

frequency

Type of information for each

event

Event

M721 M722 M723 M724

Inhibition of steadystate measurementduring event(programmable)

Waveform capture:4U/4I

Snapshot capture:1 channel

NB CA

l

l

*option

CurrentPhase A

CurrentPhase B

CurrentPhase C

Neutral

CurrentPhase A*

CurrentPhase B*

CurrentPhase C*

Neutral

VoltagePhase A

VoltagePhase B

VoltagePhase C

Neutral

Digital 1

Digital 2

Digital 3

Digital 4

Digital 5

Digital 6

Digital 7

Common

N.C.

Optical

MiCOM S1

AuxiliaryVoltage

Meter Failed

Event detected

Case earth

3

2

1

4

4

5

123

18

16

14

12

10

8

6

11

7,9,13,15,17

T

C

Rx*

Tx*

BNC*

ll ll5A1A

5A1A

5A1A

5A1A

Current probe *

Current probe *

Current probe *

Current probe *

Voltage

Voltage

Voltage

Voltage

27

25

26

23

21

22

15

13

14

11

9

10

24

28

20

19

17

12

16

1

2

3

4

5

6

7

8

18

*

RS485

AnalogueTerminal

Userprogrammable

Leds

28

11

18

RX*TX*

D

+-

RS485

IRIG-B*

4

1

MiCOM M720:Rear View

A

MiCOM M720

+

A

D

*

DigitalTerminal

IRIG-B

RS232

-

+12 0

RS485

-

MICOM M720 System overview

* Please consult us

7/27/2019 m720enbr Bb

7/98

Power Qualitymonitoring

Type of events:

Voltage variations

Resolution: 0.5 cycle

Accuracy: 0.5% * of reading Number of thresholds

1 nominal threshold

1 nominal high:Default: 110%,102% to 140% step 0.1%

1 nominal low:Default: 90%,42% to 98% step 0.1%

1 interruption:Default: 10%,

2% to 38% step 0.1% Hysteresis:

Default: 2%1% to 20% step 0.1%

Digital channels: 7

Rising or falling edge

Resolution 12.5 ms

Signalling voltages

Resolution: 200 ms

Accuracy of the thresholds: 0.5%

Range: 1% to 10% Un Number of frequencies: 5

50 - 5000Hz step 1Hz

Thresholds: 0.1% - 2% step 0.1%

Hysteresis: 0.1% - 20% step0.1%

Harmonics and inter-

harmonics

Resolution: 200 ms

Accuracy: 0.5% * of reading

Threshold accuracy: 0.5%

Number of events:Voltage harmonics: 49

(40 @ 60Hz) Thresholds:

Voltage harmonics: 49(40 @ 60Hz)

Current harmonics: 49(40 @ 60Hz)

32 events on HU/IHU/HI

0.1% - 20% step 0.1%

THD

Voltage THD, voltage interharmonics TIHD, current THD

Resolution: 200 ms

Accuracy: 0.5% of full scale

Number of events: 9

Thresholds: 3: Low, medium, high0.1% - 20% step 0.1%

Voltage unbalance

Range: 0 - 5%

Resolution: 200 msAccuracy: 1% of reading

Number of events: 1

Thresholds: 3: Low, medium, high0.1% - 20% step 0.1%

Flicker: IEC 61000-4-15

Accuracy: 5%Pst (10 mn)Plt (2hours) analysis software

Frequency variation On channel V1

Range: 10%

Accuracy: 0.1% (centrefrequency) natural averagingover integration period

Monitoring - cyclic

measurements

Accuracy (15% to 160% of Range) Phase and line RMS voltages:

0.2% of reading Negative sequence voltage:

0.5% of reading Voltage unbalance

1% of reading Phase current, neutral current** :

0.5% of reading Active powers

1% of reading (at pf unity) Reactive powers:

1% of reading (at pf unity) Apparent powers (derived

quantities): 1% of reading Power factors (derived

quantities): 1% of reading Frequency:

0.1% (at central frequency) Harmonics V, I: 0.5%** K-factor: M722 and M724 only

Event relay contact

Watch dog Event in memory Rating: 50VA resistive

Communication interface

Front port

Local, asynchronous, baud rate:1200 to 19200bauds,

Rear portRS485Modbus RTU, 300 - 38400baudsIEC 60870-5-103:

- RS485- optical interface (option)

Overvoltagethresholds

M721 M722 M723 M724

Undervoltagethresholds

HV slidingreference

Configurablestandards

2 9 2 9

4 19 4 19

Number of events

M721 M722 M723 M724

2 4 8 8

1 2*Storage memory (Mb)

140 308Trend recording (hours)(short time) (ex. 10 min)

Events (number of)

Waveform capture (8 channels)

Snapshot (1 channel)

4 8* 8

178 357 804

8

78

Evolution recording (hours)(very short time) (ex. 10 sec)

Min. storage duration (Days) 3.7 7.9 7.4 14.8 32.9 3.2 / 14.8

136 288 177 355 355 76

6 553 6553 655 3 13107 13 107 13107

16 33 33

148 296 296

N/A N/A

N/A N/A

*option

** excluding current probe error** between: 15% to 160% of Range

7/27/2019 m720enbr Bb

8/9

7/27/2019 m720enbr Bb

9/910

7

Power Quality Monitoring Equipment

Version

DistributionDistribution - Investigation

TransmissionTransmission - Investigation

Packaging

Normal (rack)Portable (carrying case)

Meter type MiCOM M 2

12

34

RP

Frequency

50Hz60Hz

56

Auxiliary source

48/125 Vdc / 115 ac (50/60Hz)220/250 Vdc /230 ac (50/60Hz)

12

(AC) Option batteryYesNo

10

Protocol

MODBUSIEC 60870-5-103 *

1

3

Optical

YesNo (RS485)

10

Input voltage

110 Vac400 Vac*

12

Harmonic

50th (50Hz), 40th (60Hz) harmonics 1

Digital channels input voltage

48-150 Vdc130-250 Vdc

12

Current inputs

1A, 5A, clip-on probes1A, 5A, short circuitorsClip on only

123

IRIG-B

YesNo

10

Memory

No2Mb (M721 only)8Mb (M722 only)

012

Special parameter

NoYes

01

Language

FrenchEnglishSpanishGermanOther (customisable)*Portuguese

012345

*

Please

con

sultus

*

Information required with order