发电机故障分量负序能量方向保护

2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077) Pub Date : 2000-01-23 DOI:10.1109/PESW.2000.847639

Liu Shiming, Yin Xianggen, Chen Deshn, Tao Huiliang

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引用次数: 8

摘要

故障分量负序方向继电器(FCNSD)只需在发电机端子处输入三相电压和电流，就能以很高的灵敏度检测发电机的各种不对称故障。本文将基于里昂变换的瞬时负序对称分量应用于FCNSD继电器中。通过对某实验室发变机组的试验，发现里昂分量功率值中存在很大的谐波成分。本文从理论上推导了这些谐波成分的作用机理。为了消除谐波分量的影响，提出了一种新的故障分量负序能量方向保护准则。

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Fault component negative-sequence energy direction protection for generators

Fault component negative-sequence direction (FCNSD) relays only need three phases voltages and currents at generator terminals, and can detect various asymmetrical faults in generators with a very high sensitivity. In this paper, the instantaneous negative-sequence symmetrical components, which are based on the Lyon transform an used in the FCNSD relay. From the results of tests on a laboratory generator-transformer unit, it is found that there are very large harmonic constituents in the Lyon component power values. The mechanism of these harmonic constituents is theoretically derived in the paper. To eliminate the influence of the harmonic constituents, a new criteria is proposed-fault component negative-sequence energy direction (FCNSED) protection.

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2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077)

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