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首页> 外文会议>IEEE International Conference on Advanced Power System Automation and Protection >Adaptive Single Phase Autoreclosing Scheme for EHV Transmission Line
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Adaptive Single Phase Autoreclosing Scheme for EHV Transmission Line

机译：超高压输电线路的自适应单相自动重合闸方案

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摘要

Efficient protection system plays a vital role in power system stability by detecting and eliminating the faults quickly on overhead transmission lines. Temporary fault is the most frequent fault type that appears on high voltage (HV) and extra high voltage (EHV) lines which are followed by secondary arcs. Consequently adaptive single phase autorecloser (ASPAR) is the need of the time to get rid of temporary faults. Continuous wavelet transform (CWT) with fast Fourier transform (FFT) algorithm (CWTFT) is presented in this paper which utilises faulted phase voltage waveform and obtain wavelet coefficients after the circuit breaker isolate the faulty phase. Depending on the energies of the wavelet coefficients, a threshold is defined. In case of a transient fault, the coefficient energies exceeds the threshold level after the arc extinction and are well recognised by the proposed algorithm. This fact is used to initiate a safest reclosing in case of a temporary fault otherwise autoreclosing will be blocked. To appraise the efficiency of the presented algorithm, laborious simulations have been performed for a diversity of fault conditions i.e. at different fault locations, load angles and fault resistance, where in all cases, maximum consistency has been achieved.
机译：有效的保护系统通过快速检测并消除架空输电线路的故障，对电力系统的稳定性起着至关重要的作用。临时故障是最常见的故障类型，出现在高压（HV）和超高压（EHV）线路上，随后是次级电弧。因此，需要时间来消除临时故障，因此是自适应单相自动重合闸（ASPAR）。本文提出了具有快速傅里叶变换（FFT）算法（CWTFT）的连续小波变换（CWT），该方法利用故障相电压波形并在断路器隔离故障相后获得小波系数。取决于小波系数的能量，定义了阈值。在发生瞬时故障的情况下，灭弧后的系数能量超过了阈值水平，并被所提出的算法很好地识别。此事实用于在出现临时故障的情况下启动最安全的重合闸，否则自动重合闸将被阻止。为了评估所提出算法的效率，已经针对各种故障状况（即在不同故障位置，负载角度和故障电阻下）进行了费力的仿真，其中在所有情况下均已实现了最大的一致性。

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