Protection Coordination Analysis

8/9/2019 Protection Coordination Analysis

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Power System Protection Coordinationwith Redundant Relay Application

in Switchgear and MCCPresenter

Shefian Bin Md Dom (HGE120021)

SupervisorDr. Ab Halim Bin Abu Bakar


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:: Presentation Outlines::

Introduction

Problem Statement

Research Objectives

Result & Discussion

Conclusion

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:: Introduction ::

The operation of the protection system should be fast and shouldisolate only the faulty section in the shortestpossible time to achieveminimumdisturbance to the system.

Failure of a protective relay can result in devastating equipment

damage and prolonged downtime as fault travel further deep intopowersystem structure fromthe actual faultlocation.

This can be prevented by having optimum protectioncoordinationbetweenprotectionequipment.

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:: Introduction ::4


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:: Introduction ::5 Old-TimerTools !


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:: Introduction ::9 TodayTools !


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::Problem Statement ::

Generally, optimum protection coordination study will ensurenearest protection devices to response against fault in shortestpossible time withinacceptable grading margin.

Protection coordination study require complicated analysis and

long duration of time will involved as short-circuit analysis andprotectiongrading mustbe complete together.

In the even of faulty on main protection relay, there must be aredundant relay with proper protection coordination to ensurecomplete isolation of fault from travel further into power systemnetwork.

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:: Research Objectives::11

1. To describe methodology required to achieve protectioncoordinationinpowersystem network.

2. To perform full analysisusing SKMsoftware inorderto achieveprotectioncoordinationbetween protectiondevices.

3.To evaluate the suitability of introducing redundant relay in

the existing power system network from the aspect of properprotectioncoordination.


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:: Methodology ::

1 • Study Protection Coordination Concept

2• Familiarization of Power System Analysis Software

3• Technical Data Collection

4• Perform Protection Coordination Analysis

5• Review with Industrial Expert & Professional

6• Produce Protection Coordination Report

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:: Result& Discussion ::

Network Modelling

Coordination Basis

Fault Level Analysis

Device Plug Setting

Protection Coordination

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The network modelling is replication of actual network

parameters from few different projects.Lynas Phase 2 (LampsUp), Onshore Malaysia.

PKN PTA, Wloclawek, Onshore Poland.

Petrofac FPSO Berantai & Wellhead, OffshoreMalaysia

Petronas Platform Bekok C, Offshore Malaysia

The analysis approach consist of real parameters fromlisted projects dedicate for conceptual study purposeand no commercial value.

Divide into Upstream (Switchgears) and Downstream(MCC)

14 Network Modelling


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15 Network Modelling


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bbb16 Network Modelling (Upstream 33/11kV)


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17 Network Modelling (Upstream 33kV)


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18 Network Modelling (Upstream 11kV)


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19 Network Modelling (Downstream 0.4kV)


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Coordination basis is set of information to show initial criteria and

assumption of respective power network under discussion.

Sample of Coordination Basis:

“The coordination margin between relays in series will be minimum

0.30s”

25 Coordination Basis


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26 Coordination Basis

CoordinationBasis

General

CoordinationMargin

Plug Setting Discrimination

MCCModules

Load Type StartingMethod

Protections

Transformer

Apparent(VA) Loaded Discrimination


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27

Fault LevelAnalysis

ANSI IEC

IEC60909 IEC61363

Comprehensive

Fault Level Analysis (Comprehensive)


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28 Fault Level Analysis (Comprehensive)

Sources ofFault Current

Utility

Generator

SynchronousMotor

InductionMotor


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The maximum fault levels will be used in coordination asdiscrimination margin point.

The definition of maximum fault levels condition includes full loadcapac ity, bus tie momentary close during synchronization betweenall busesunder Auto Transfer Switch (ATS) and generatoroperated.

29 Fault Level Analysis (Comprehensive)

Switchboard

Maximum Fault DesignFault

Three-Phase RMS

Fault (kA)

Three-Phase RMS

Fault (kA)

2LV8551A 62.121 80kA

2LV8551B 58.729 80kA

4MV8552 10.327 25kA

4MV8501 9.743 25kA


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SKM

Device Plug Setting (ANSI 51 OC IDMT)


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31 Device Plug Setting (ANSI 51 OC IDMT)

SKM


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32 Device Plug Setting (ANSI 50 OC DT)

SKM


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Protection Coordination (LV/MCC)33

MNSiSStarter


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Protection: ANSI 49 Thermal Overload

This function is used to protect equipment suchmotors and transformers against overloads basedon measurement of the c urrent consumed.

MNSiSStarter


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The cold curve defines the

protection tripping time based onzero heat rise.

MNSiSStarter


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The hot curve defines the

protection tripping time based on100 % nominal heat rise.

MNSiSStarter


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MNSiSStarter


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MNSiSStarter


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MNSiSFeeder


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Protection: ANSI 50/51 Phase Overcurrent The phase overcurrent protection function is

three-pole. It picks up if one, two or three of thephase currents reach the operation set point.

REF542+ R-2LV8551A


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REF542+ R-2LV8551A


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REF542+ R-2LV8551A REF542+ 4TR8560

Protection Coordination (LV/MV)48

Protection Grading withFull Discrimination Technique


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49

0.4kV LV SWGR

6.6kV MV SWGR

WellheadPlatform FPSO Berantai Vessel

FPSO VesselA floating production, storage and offloading (FPSO)unit is a floating vessel used by the offshore oil and

gas industry for the production, processingof hydrocarbonsand for storage of oil

Protection Grading withFull Discrimination Technique

Protection Coordination (LV/MV)

REF542+ R-2LV8551A

0.4kV LV SWGR


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Protection Grading withNo Discrimination Technique

REF542+ 4TR8560REF542+ R-2LV8551A



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Protection Grading withNo Discrimination Technique

Substation 1

Substation 2

Substation 3

Substation 4



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Full Discrimination No Discrimination

1) Suitable for implementation whereMV and LV substation location veryfar from each other.

1) Suitable for implementation whereMV or LV substation exist in thesame building or area.

2) Total time margin will be longer 2) Total time margin will be shorter

3) Fault isolation on either transformerprimary or secondary with respectto fault location.

3) Fault isolation on both transformerprimary and secondary regardlessfault location.



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Self-supplied (No external power required)

Use microprocessor with Rogowsky Coil Sensor Simulation secondary injection using 5V USB EKIP CB Remote Open / Close using Modbus RTU Robust Design and Compact in size

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Redundant Relay of ABB SACE PR123/P



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Protection Grading withMix Discrimination Technique



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Protection Grading withMix Discrimination Technique



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57 Protection Coordination (LV/MV)


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:: Conclusion ::

2.The tedious analysis process of protection coordination study

can even further simplified in SKM software. Engineer can use SKMDapper for short circuit analysis then followed by SKM Captor forprotection coordination analysis. Therefore protection coordinationstudies completely achieved with the help of SKM software.

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:: Conclusion ::

3.Based on SKM simulation, it was concluded that redundant

relay can be introduced in the existing power system to maximizereliability of the system. It was also proven in SKM Captor thatredundant relay successfully achieve desired protectioncoordination.

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Documents

Protection Coordination Analysis