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Power System Protection Coordination
with Redundant Relay Application
in Switchgear and MCC
Presenter
Shefian Bin Md Dom (HGE120021)
Supervisor
Dr. Ab Halim Bin Abu Bakar
:: Presentation Outlines ::
Introduction
Problem Statement
Research Objectives
Result & Discussion
Conclusion
:: Introduction ::
The operation of the protection system should be fast and should
isolate only the faulty section in the shortest possible time to achieve
minimum disturbance to the system.
Failure of a protective relay can result in devastating equipment
damage and prolonged downtime as fault travel further deep into
power system structure from the actual fault location.
This
can be prevented by having optimum
coordination between protection equipment.
protection
:: Introduction ::
:: Introduction ::
Old-Timer
Tools !
:: Introduction ::
Old-Timer
Tools !
:: Introduction ::
Old-Timer
Tools !
:: Introduction ::
Old-Timer
Tools !
:: Introduction ::
Today
Tools !
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:: Problem Statement ::
Generally, optimum protection coordination study will ensure
nearest protection devices to response against fault in shortest
possible time within acceptable grading margin.
Protection coordination study require complicated analysis and
long duration of time will involved as short-circuit analysis and
protection grading must be complete together.
In the even of faulty on main protection relay, there must be a
redundant relay with proper protection coordination to ensure
complete isolation of fault from travel further into power system
network.
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:: Research Objectives ::
1.
To describe methodology required to achieve protection
coordination in power system network.
2.
To perform full analysis using SKM software in order to achieve
protection coordination between protection devices.
3.
To evaluate the suitability of introducing redundant relay in
the existing power system network from the aspect of proper
protection coordination.
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:: Methodology ::
1
2
3
4
5
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Study Protection Coordination Concept
Familiarization of Power System Analysis Software
Technical Data Collection
Perform Protection Coordination Analysis
Review with Industrial Expert & Professional
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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Network Modelling
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, Offshore
Malaysia
Petronas Platform Bekok C, Offshore Malaysia
The analysis approach consist of real parameters from
listed projects dedicate for conceptual study purpose
and no commercial value.
Divide into Upstream (Switchgears) and Downstream
(MCC)
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Network Modelling
16
bbb
Network Modelling (Upstream 33/11kV)
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Network Modelling (Upstream 33kV)
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Network Modelling (Upstream 11kV)
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Network Modelling (Downstream 0.4kV)
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Network Modelling (Downstream 0.4kV)
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Network Modelling (Downstream 0.4kV)
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Network Modelling (Downstream 0.4kV)
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Network Modelling (Downstream 0.4kV)
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Network Modelling (Downstream 0.4kV)
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Coordination Basis
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
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Coordination Basis
Coordination
Basis
MCC
Modules
General
Coordination
Margin
Plug Setting
Discrimination
Load Type
Starting
Method
Transformer
Protections
Apparent
(VA) Loaded
Discrimination
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Fault Level Analysis (Comprehensive)
Fault Level
Analysis
IEC
ANSI
IEC60909
Comprehensive
IEC61363
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Fault Level Analysis (Comprehensive)
Sources of
Fault Current
Utility
Generator
Synchronous
Motor
Induction
Motor
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Fault Level Analysis (Comprehensive)
Maximum Fault
Design Fault
Three-Phase RMS
Three-Phase RMS
Fault (kA)
Fault (kA)
2LV8551A
62.121
80kA
2LV8551B
58.729
80kA
4MV8552
10.327
25kA
4MV8501
9.743
25kA
Switchboard
The maximum fault levels will be used in coordination as
discrimination margin point.
The definition of maximum fault levels condition includes full load
capacity, bus tie momentary close during synchronization between
all buses under Auto Transfer Switch (ATS) and generator operated.
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Device Plug Setting (ANSI 51 OC IDMT)
SKM
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Device Plug Setting (ANSI 51 OC IDMT)
SKM
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Device Plug Setting (ANSI 50 OC DT)
SKM
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Protection Coordination (LV/MCC)
MNSiS Starter
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Protection Coordination (LV/MCC)
MNSiS Starter
Protection: ANSI 49 Thermal Overload
This function is used to protect equipment such
motors and transformers against overloads based
on measurement of the current consumed.
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Protection Coordination (LV/MCC)
MNSiS Starter
The cold curve defines the
protection tripping time based on
zero heat rise.
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Protection Coordination (LV/MCC)
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Protection Coordination (LV/MCC)
MNSiS Starter
The hot curve defines the
protection tripping time based on
100 % nominal heat rise.
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Protection Coordination (LV/MCC)
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Protection Coordination (LV/MCC)
MNSiS Starter
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Protection Coordination (LV/MCC)
MNSiS Starter
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Protection Coordination (LV/MCC)
MNSiS Starter
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Protection Coordination (LV/MCC)
MNSiS Starter
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Protection Coordination (LV/MCC)
MNSiS Feeder
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Protection Coordination (LV/MCC)
MNSiS Feeder
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Protection Coordination (LV/MCC)
REF542+ R-2LV8551A
Protection: ANSI 50/51 Phase Overcurrent
The phase overcurrent protection function is
three-pole. It picks up if one, two or three of the
phase currents reach the operation set point.
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Protection Coordination (LV/MCC)
REF542+ R-2LV8551A
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Protection Coordination (LV/MCC)
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Protection Coordination (LV/MV)
REF542+ R-2LV8551A
Protection Grading with
Full Discrimination Technique
REF542+ 4TR8560
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Protection Coordination (LV/MV)
Protection Grading with
Full Discrimination Technique
REF542+ R-2LV8551A
Wellhead
Platform
FPSO Berantai Vessel
6.6kV MV SWGR
0.4kV LV SWGR
0.4kV LV SWGR
FPSO Vessel
A floating production, storage and offloading (FPSO)
unit is a floating vessel used by the offshore oil and
gas industry for the production, processing
of hydrocarbons and for storage of oil
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Protection Coordination (LV/MV)
REF542+ R-2LV8551A
Protection Grading with
No Discrimination Technique
REF542+ 4TR8560
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Protection Coordination (LV/MV)
Protection Grading with
No Discrimination Technique
Substation 4
Substation 1
Substation 2
Substation 3
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Protection Coordination (LV/MV)
Full Discrimination
No Discrimination
1) Suitable for implementation where
MV and LV substation location very
far from each other.
1) Suitable for implementation where
MV or LV substation exist in the
same building or area.
2)
2) Total time margin will be shorter
Total time margin will be longer
3) Fault isolation on either transformer
primary or secondary with respect
to fault location.
3)
Fault isolation on both transformer
primary and secondary regardless
fault location.
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Protection Coordination (LV/MV)
Redundant Relay of ABB SACE PR123/P
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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Protection Coordination (LV/MV)
Redundant Relay of ABB SACE PR123/P
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Protection Coordination (LV/MV)
Protection Grading with
Mix Discrimination Technique
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Protection Coordination (LV/MV)
Protection Grading with
Mix Discrimination Technique
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Protection Coordination (LV/MV)
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:: Conclusion ::
1. At the end of this project, the complete methodology of
protection coordination process using SKM software can be
described step by step. Technical data at dedicated power system
must be collected and later will be modelled in SKM software to
replicate the actual system. Then further analysis of short-circuit
current and protection components coordination required. Once
complete the protection coordination report will be produced for
distribution purpose.
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:: Conclusion ::
2. The tedious analysis process of protection coordination study
can even further simplified in SKM software. Engineer can use SKM
Dapper for short circuit analysis then followed by SKM Captor for
protection coordination analysis. Therefore protection coordination
studies 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 maximize
reliability of the system. It was also proven in SKM Captor that
redundant relay successfully achieve desired protection
coordination.
