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首页> 外文会议>2012 IEEE Student Conference on Research and Development >Symmetrical fault detection technique during power swing based on S-Transform
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Symmetrical fault detection technique during power swing based on S-Transform

机译：基于S变换的功率摆动对称故障检测技术。

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摘要

Disturbances in a power system such as line switching and sudden removal of faults may cause instability which lead to the power swing phenomenon. During a power swing, the mal-operation of distance relay is among the problem which needs to be solved. In the case of a power swing, a distance relay is designed to block detection to avoid wrong interpretation of relay current signals. However, this blocking scheme proves to be unreliable as it could block the trip signals when a genuine fault occurs in the system during a power swing. Hence, it is vital to develop a proper fault detection technique during a power swing to avoid such circumstances. This paper presents a detection technique to detect symmetrical faults during a power swing based on the time frequency transform known as S-Transform. To ascertain validity of the proposed scheme, it was verified with the IEEE 14-bus system and simulation results showed that the proposed technique was able to detect symmetrical faults occurring in the power system.
机译：电力系统中的干扰（例如线路切换和故障的突然消除）可能会导致不稳定，从而导致功率波动现象。在功率摆幅中，距离继电器的误动是需要解决的问题之一。在功率摆幅的情况下，距离继电器被设计为阻止检测，以避免错误解释继电器电流信号。但是，这种阻塞方案被证明是不可靠的，因为当电源摆幅期间系统中出现真正的故障时，它可能会阻塞跳闸信号。因此，在电源摆幅期间开发适当的故障检测技术以避免这种情况至关重要。本文提出一种检测技术，该技术基于称为S变换的时频变换来检测功率摆幅期间的对称故障。为了确定所提出方案的有效性，已通过IEEE 14总线系统对其进行了验证，仿真结果表明所提出的技术能够检测出电力系统中出现的对称故障。

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