瞬时过流继电器在输电线路故障保护与控制中确定阈值电流和电压的应用

Signals Pub Date : 2023-02-07 DOI:10.3390/signals4010007
V. Ogar, Sajjad Hussain, K. Gamage
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引用次数: 1

摘要

当传输线发生故障时,继电器应将故障信号送到断路器,使线路跳闸或隔离。在电力系统中,及时检测故障是故障保护和输电线路管理的重要组成部分。本文研究了利用阈值电流和阈值电压来降低330kv输电线路瞬时过流继电保护的延时时间和跳闸时间。利用MATLAB中的小波变换工具箱和Simulink模型设计模型,检测主继电器未动作或故障未及时清除时备用继电器跳闸的阈值和协调时间。分析了该模型与没有阈值的模型之间的差异。仿真结果表明,与不设阈值的其他技术相比,两种继电器的跳闸时间快速准确,跳闸时间为60% ~ 99.87%。该模型可以消除编程瞬时过流继电器整定时的反复试验,从而达到最佳性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Use of Instantaneous Overcurrent Relay in Determining the Threshold Current and Voltage for Optimal Fault Protection and Control in Transmission Line
When a fault occurs on the transmission line, the relay should send the faulty signal to the circuit breaker to trip or isolate the line. Timely detection is integral to fault protection and the management of transmission lines in power systems. This paper focuses on using the threshold current and voltage to reduce the time of delay and trip time of the instantaneous overcurrent relay protection for a 330 kV transmission line. The wavelet transforms toolbox from MATLAB and a Simulink model were used to design the model to detect the threshold value and the coordination time for the backup relay to trip if the primary relay did not operate or clear the fault on time. The difference between the proposed model and the model without the threshold value was analysed. The simulated result shows that the trip time of the two relays demonstrates a fast and precise trip time of 60% to 99.87% compared to other techniques used without the threshold values. The proposed model can eliminate the trial-and-error in programming the instantaneous overcurrent relay setting for optimal performance.
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来源期刊
CiteScore
3.20
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11 weeks
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