TestDrive Demo Electric Ship Onboard Power System

TestDrive DemoTestDrive DemoElectric Ship Onboard Power Electric Ship Onboard Power

SystemSystem

OPAL-RT TECHNOLOGIESMontreal, Quebec, Canada

www.OPAL-RT.com

EMSRev. 001, March, 2009

2

Contents

Model Description

TestDrive Panel Introduction

Test Scripts

Model link: onboardPS_ESTS_mdl1v19b_r2008a.mdl (open with Matlab 7.0.1, if open with higher version quit without save)

3

Model Schematic

The Electric Ship Onboard Power System

PCMNV acload

PCMNV dcload

PCMVitalload

PCMVitalload

PCMNV dcload

PCMNV acload

PGMPCM

PCM

PCM NV acload

PCM NV dcload

EPM M

PCM NV dcload

PCM NV acload

EPM M

Port Bus

Starboard Bus

Generator Group

Load Group1 on Port Side

Load Group1 on Starboard Side

Load Group2 on Port Side

Load Group2 on Starboard Side

Zone 1

Load Group 1 on Port Side


GeneratorGroup

Load Group 1 on Starboard Side


Zone 2



GeneratorGroup



Zone 3



GeneratorGroup



Zone 4

SW

-G1

SW-P1

SW

-G2

SW-S1

SW-P2

SW-S2

SW-P3

SW-S3

Fault Location 1

Fault Location 2

In this 1-target model, only Zone 1 and 2 are modeled.

4

Model Schematic

Load Details

Hotel load: Non-critical ac

load

Induction motor (IM)

Critical load

Constant power load: Non-

critical dc load

5

Model Description

This model simulate a electric ship onboard power

system.

Two zones are simulated in a 1-target model and

four zones are simulated in a 2-target model.

It can be used for system steady state and

transient studies. During a fault, the onboard

power system is reconfigured to avoid failure of

critical loads.

6

Model Description

Zone 1Load

Group 1

Shared Memory

Zone 1Generator

Group

Zone 1Load

Group 2

Zone 2Load

Group 1

Zone 2Generator

Group

Zone 2Load

Group 2

CPU1 CPU2 CPU3

CPU4 CPU5 CPU6

Target 1

Zone 3Load

Group 1

Shared Memory

Zone 3Generator

Group

Zone 3Load

Group 2

Zone 4Load

Group 1

Zone 4Generator

Group

Zone 4Load

Group 2

CPU1 CPU2 CPU3

CPU4 CPU5 CPU6

Target 2

PC

I E

xpre

ss

CPU allocation and Signal exchange media

Two zones are simulated in a 1-target model and four zones are simulated in a 2-target model.

7

Model Description

Model’s look in Simulink/SPS

console

Generators@ Zone2

Load 1@ Zone2

Load 2@ Zone2

Generators@ Zone1

Load 1@ Zone1

Load 2@ Zone1

8

Model Description

System Load

Induction machine

Hotelload

Constant power load

9


Control Panel and System Diagram

AC load break On/OffConst. load ref. setTSB compensation

Scope select

IM controlselect

IM load select

Faultsetup

10


IM Measurement Panel

IM 3-phase voltages

IM 3-phase currents

IM active & reactive powers

IM Torques (elec. & Mech.), mech. Speed,

modulation index

11


Load Measurement Panel

Hotel load 3-phase voltages

Hotel load 3-phase currents

Hotel load P & Q

Constant Load Power

12


Bus Measurement Panel

Port and starboard bus Voltages

dc voltages of Gen1 & collector

bus

dc currents of Gen1 & collector

bus

powers of Gen1 & collector bus

13


System Schematic

14

Test Scripts

1. Steady state1. Steady state2. IM control3. Hotel load and Constant load variations4. Time Stamped Bridge compensation

2. Fault studies1. Generator bus fault2. Port bus fault

15

Test Scripts



16

Test Script: Steady State

1.1Steady state In Control Panel, keep parameters at default values. Select

buses port/starboard and which zone and load to observe the waveforms.

Control Panel

17


1.1Steady statebus voltages are at 1pu in steady states

Bus measurement Panel

18


1.1Steady stateHotel load power is 1pu, constant power is 0.5pu as set in the control panel. (The base value of the two powers are on their own ratings)

Load measurement Panel

19


1.1Steady state

IM measurement Panel

20


1.2IM control In Control Panel, select IM load, IM control mode and reference,

and perturbation mode and magnitude.

Control Panel

21


1.2 IM controlIn this test, the IM load ‘torque=omege^2’, control mode=‘speed control’,

Speed reference = ‘0.8pu’, perturbation mode =‘Triangle’, perturbation value=‘0.1pu’ are selected.


the IM speed tracks to its reference

22


1.2 IM controlIn this test, the IM load ‘torque=omege^2’, control mode=‘speed control’,

Speed reference = ‘0.8pu’, perturbation mode =‘Triangle’, perturbation value=‘0.1pu’ are selected.

Bus measurement Panel

23


1.3Hotel load and Constant load variations In Control Panel, select to switch On/Off of one branch of Hotel load.Set the constant load power reference.

Control Panel

24


1.3Hotel load and Constant load variationsIn this test, ‘ac_load_break’ = ‘Off’, ‘const_ld_ref’=1.5pu

Load measurement Panel

the constant power load consumes a power of 1.5

pu, same as the reference

the Hotel load current and power reduced to 0.2 pu

(the load of 0.8 pu is switched off)

25


1.4Time Stamped Bridge compensation In Control Panel, switch the ‘TSB compensation’ ON/OFF to see its

effects on the waveforms.

Control Panel

26

Test Script: HVAC Fault

1.4Time Stamped Bridge compensationTo have a close view of waveforms, show acquisition group 1,

set frame size = 50 ms.

Show acquisitionGroup 1, set frame

Size = 50 ms

27


1.4Time Stamped Bridge compensation

Without RTE compensation

bus measurement Panel

With RTE compensation

Vdc has ±1% variations Vdc has ±0.5% variations

28






IM Voltages has more distortion

IM currents has more distortion

IM elec. torque has larger ripples

29






Hotel load Voltages has more distortion

Hotel load currents has more distortion

Power of constant power load has larger ripples (±50% vs. ±7% )

30

Test Scripts



31

Test Script: Fault Studies

2.1Generator bus fault at Zone 1 In Control Panel, select the fault being ‘permanent’ or ‘periodical’,

set fault = ‘Generator bus’.

Control Panel

32


2.1Generator bus fault

measurements @ Zone 1Bus measurement Panel

As fault cleared, Gen1 and collector bus voltages rising up.

The system reconfigure its connection by switching off the fault generation group and keeps port and starboard bus Voltages 1 pu

Gen1 and collector bus voltages drop to zero during the fault.

Generator is re-connected 0.1s after the fault is cleared. Vdc drops to 0.8 pu because Vdc_gen has not recovered to 1pu at that moment.

33


2.1Generator bus fault at Zone 1In the control panel, select ‘scope selection’ to ‘zone 2 load 1’.


Port and starboard bus voltages in Zone 2 have same profile as in Zone 1

Generator group in Zone 2 is affected.

Adjusting the generator reconnection policy (e.g. delay time) can avoid voltage drop on port and starboard buses.

34


2.1Generator bus fault at Zone 1The fault has little effects on the hotel load and constant power load.

measurements @ Zone 1 Load measurement Panel

The visible effects is due to dc voltage drop when the generator group is re-connected

35


2.1Generator bus fault at Zone 1

measurements @ Zone 1 IM measurement Panel

The visible effects is due to dc voltage drop when the generator group is re-connected

36


2.2Port bus fault at Zone 1 In Control Panel, select the fault being ‘permanent’ or ‘periodical’,

set fault = ‘Port bus’.

Control Panel

37


2.2Port bus fault at Zone 1


Port bus at Zone 1 reconnects to adjacent zones 0.05s after fault cleared.

Starboard bus voltage remains 1 pu

Port bus Voltage drop to zero during the fault.

Generators reconnect 0.1s after the fault cleared.

The system reconfigure its connection to isolate the port bus of Zone 1. Voltages of port bus at other zones, and generator bus at Zone 1 stay around 1 pu.

38


2.2 Port bus fault at Zone 1In Control Panel, select ‘port bus’ and loads in Zone 1.

Zone 1 Port Busload measurement Panel

All the non-critical loads connected to port bus fail during fault

39



Zone 1 Port BusIM measurement Panel

IM, as a critical load, works normally due to its redundant power supply: it is connected to both port and starboard buses.

40


2.2 Port bus fault at Zone 1In Control Panel, select ‘starboard bus’ and loads in Zone 1.

Zone 1 Starboard BusLoad measurement Panel

All the non-critical loads connected to starboard bus work normally during fault

41




There is oscillations when reconnection. It can be improved by system design (i.e. a reactor between adjacent zones).

Port bus at Zone 2 remains 1 pu since during the fault it is disconnected from Zone 1

42



Zone 2 Port Busload measurement Panel

All the non-critical load connected to port bus at Zone 2 only has little effects during reconnection after the fault is cleared.

43

Thanks

End of Electric Ship Onboard Power System

Demo.

Questions and comments?

Documents

TestDrive Demo Electric Ship Onboard Power System