Testdrive demo electric ship onboard power system
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TestDrive Demo Electric Ship Onboard Power System. OPAL-RT TECHNOLOGIES Montreal, Quebec, Canada www.OPAL-RT.com. EMS Rev. 001, March, 2009. Contents. Model Description TestDrive Panel Introduction Test Scripts Model link: onboardPS_ESTS_mdl1v19b_r2008a.mdl

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TestDrive Demo Electric Ship Onboard Power System

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Testdrive demo electric ship onboard power system

TestDrive DemoElectric Ship Onboard Power System

OPAL-RT TECHNOLOGIES

Montreal, Quebec, Canada

www.OPAL-RT.com

EMS

Rev. 001, March, 2009


Contents

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)


Model schematic

Model Schematic

The Electric Ship Onboard Power System

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

3


Model schematic1

Model Schematic

Load Details

Hotel load:

Non-critical ac load

Induction motor (IM)

Critical load

Constant power load: Non- critical dc load

4


Model description

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.

5


Model description1

Model Description

  • 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.

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Model description2

Model Description

Model’s look in Simulink/SPS

console

Generators

@ Zone1

Generators

@ Zone2

Load 1

@ Zone1

Load 1

@ Zone2

Load 2

@ Zone1

Load 2

@ Zone2

7


Model description3

Model Description

System Load

Induction machine

Hotel

load

Constant power load

8


Testdrive panel introduction

TestDrive Panel Introduction

  • Control Panel and System Diagram

IM load select

Scope select

Fault

setup

AC load break On/Off

Const. load ref. set

TSB compensation

IM control

select


Testdrive panel introduction1

TestDrive Panel Introduction

IM Measurement Panel

IM 3-phase voltages

IM 3-phase currents

IM active & reactive powers

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

10


Testdrive panel introduction2

TestDrive Panel Introduction

Load Measurement Panel

Hotel load 3-phase voltages

Hotel load 3-phase currents

Hotel load P & Q

Constant Load Power

11


Testdrive panel introduction3

TestDrive Panel Introduction

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

12


Testdrive panel introduction4

TestDrive Panel Introduction

System Schematic

13


Test scripts

Test Scripts

Steady state

Steady state

IM control

Hotel load and Constant load variations

Time Stamped Bridge compensation

Fault studies

Generator bus fault

Port bus fault

14


Test scripts1

Test Scripts

Steady state

Steady state

IM control

Hotel load and Constant load variations

Time Stamped Bridge compensation

Fault studies

Generator bus fault

Port bus fault

15


Test script steady state

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

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Test script steady state1

Test Script: Steady State

1.1Steady state

bus voltages are at 1pu in steady states

Bus measurement Panel

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Test script steady state2

Test Script: Steady State

1.1Steady state

Hotel 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

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Test script steady state3

Test Script: Steady State

1.1Steady state

IM measurement Panel

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Test script steady state4

Test Script: Steady State

1.2IM control

  • In Control Panel, select IM load, IM control mode and reference, and perturbation mode and magnitude.

Control Panel

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Test script steady state5

Test Script: Steady State

1.2IM control

In 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

IM measurement Panel

21


Test script steady state6

Test Script: Steady State

1.2IM control

In 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

22


Test script steady state7

Test Script: Steady State

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

23


Test script steady state8

Test Script: Steady State

1.3Hotel load and Constant load variations

In this test, ‘ac_load_break’ = ‘Off’, ‘const_ld_ref’=1.5pu

the Hotel load current and power reduced to 0.2 pu (the load of 0.8 pu is switched off)

the constant power load consumes a power of 1.5 pu, same as the reference

Load measurement Panel

24


Test script steady state9

Test Script: Steady State

1.4Time Stamped Bridge compensation

  • In Control Panel, switch the ‘TSB compensation’ ON/OFF to see its effects on the waveforms.

Control Panel

25


Test script hvac fault

Test Script: HVAC Fault

1.4Time Stamped Bridge compensation

  • To have a close view of waveforms, show acquisition group 1, set frame size = 50 ms.

Show acquisition

Group 1, set frame

Size = 50 ms

26


Test script steady state10

Test Script: Steady State

1.4Time Stamped Bridge compensation

Vdc has ±1% variations

Vdc has ±0.5% variations

Without RTE compensation

With RTE compensation

bus measurement Panel

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Test script steady state11

Test Script: Steady State

1.4Time Stamped Bridge compensation

IM Voltages has more distortion

IM currents has more distortion

IM elec. torque has larger ripples

Without RTE compensation

With RTE compensation

IM measurement Panel

28


Test script steady state12

Test Script: Steady State

1.4Time Stamped Bridge compensation

Hotel load Voltages has more distortion

Hotel load currents has more distortion

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

Without RTE compensation

With RTE compensation

IM measurement Panel

29


Test scripts2

Test Scripts

Steady state

Steady state

IM control

Hotel load and Constant load variations

Time Stamped Bridge compensation

Fault studies

Generator bus fault

Port bus fault

30


Test script fault studies

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

31


Test script fault studies1

Test Script: Fault Studies

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

2.1Generator bus fault

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

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

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.

measurements @ Zone 1

Bus measurement Panel

32


Test script fault studies2

Test Script: Fault Studies

2.1Generator bus fault at Zone 1

In 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.

measurements @ Zone 2

Bus measurement Panel

33


Test script fault studies3

Test Script: Fault Studies

2.1Generator bus fault at Zone 1

The fault has little effects on the hotel load and constant power load.

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

measurements @ Zone 1

Load measurement Panel

34


Test script fault studies4

Test Script: Fault Studies

2.1Generator bus fault at Zone 1

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

measurements @ Zone 1

IM measurement Panel

35


Test script fault studies5

Test Script: Fault Studies

2.2Port bus fault at Zone 1

  • In Control Panel, select the fault being ‘permanent’ or ‘periodical’, set fault = ‘Port bus’.

Control Panel

36


Test script fault studies6

Test Script: Fault Studies

Port bus Voltage drop to zero during the fault.

2.2Port bus fault at Zone 1

Starboard bus voltage remains 1 pu

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.

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

Generators reconnect 0.1s after the fault cleared.

measurements @ Zone 1

Bus measurement Panel

37


Test script fault studies7

Test Script: Fault Studies

2.2 Port bus fault at Zone 1

In Control Panel, select ‘port bus’ and loads in Zone 1.

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

Zone 1 Port Bus

load measurement Panel

38


Test script fault studies8

Test Script: Fault Studies

2.2 Port bus fault at Zone 1

In Control Panel, select ‘port bus’ and loads in Zone 1.

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

Zone 1 Port Bus

IM measurement Panel

39


Test script fault studies9

Test Script: Fault Studies

2.2 Port bus fault at Zone 1

In Control Panel, select ‘starboard bus’ and loads in Zone 1.

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

Zone 1 Starboard Bus

Load measurement Panel

40


Test script fault studies10

Test Script: Fault Studies

2.2 Port bus fault at Zone 1

In Control Panel, select ‘port bus’ and loads in Zone 2.

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

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

measurements @ Zone 2

Bus measurement Panel

41


Test script fault studies11

Test Script: Fault Studies

2.2 Port bus fault at Zone 1

In Control Panel, select ‘port bus’ and loads in Zone 2.

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

Zone 2 Port Bus

load measurement Panel

42


Thanks

Thanks

End of Electric Ship Onboard Power System Demo.

Questions and comments?

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