NDLI: Controlled islanding of transmission system using synchrophasor measurements

Content Provider	IET Digital Library
Author	Raj, Akhil Gajjar, Gopal Soman, Shreevardhan Arunchandra
Abstract	The authors propose a smart transmission system islanding scheme during an out-of-step (OOS) condition using PMU data. An OOS condition leads to the formation of electrical centers on a few transmission lines. The distance relays on the lines misinterpret it as a bolted three-phase fault and trip leading to an uncontrolled system separation. The load-rich islands can blackout due to massive generation-load imbalance. Recent research has shown that the evolution of electrical centers can be tracked by PMUs and hence, distance relays on these lines can be temporarily blocked from operation. The authors now propose an adaptive islanding scheme wherein (i) the islands contain coherent generators and (ii) overall load shed is minimised. In other words, the authors propose a simple and efficient method for determining the optimal cutset using PMU data. The method does not require explicit coherency determination of generators and can be implemented within the time interval of two PMU frames (40 ms in India). Simulation results on the 16-generator system and the Indian power system demonstrate the efficacy of the proposed method.
Starting Page	1942
Ending Page	1951
Page Count	10
ISSN	17518687
Volume Number	13
e-ISSN	17518695
Issue Number	Issue 10, May (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/13/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2018.5570
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-04-24
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	16-generator System Adaptive Islanding Scheme Coherent Generators Control of Electric Power System Controlled Islanding Distance Relays Distributed Power Generation Electrical Centres Indian Power System Load Shedding Load-rich Islands Massive Generation-load Imbalance OOS Condition Out-of-step Condition Overall Load Overall Load Shed Phasor Measurement PMU Data PMU Frames Power System Control Power System Economics Power System Managemen Power System Measurement And Metering Power System Operation Power System Protection Power System Relaying Power System Stability Power Transmission Control Power Transmission Fault Power Transmission Line Power Transmission Protection Relay Protection Smart Transmission System Islanding Scheme Synchrophasor Measurement Three-phase Fault Time 40.0 Ms Transmission Line Uncontrolled System Separation
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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