【作者】 戴光武； 都洪基； 贾磊； 章柯； 施玲君；

【Author】 Dai Guang-wu Du Hong-ji Jia Lei Zhang Ke Shi Ling-jun Nanjing University of Science & Technology,Nanjing 210094

【机构】 南京理工大学；

【摘要】 小波变换的优点在于其分频特性,可将信号中不同的频率成分分解出来,从而更清晰的反映出故障暂态信号中某频段的时域特征。单相接地故障发生后,故障线路的零序电流幅值大于正常线路,而极性与其相反,这就有助于基于小波变换故障选线算法的提出。文章从故障信息的小波分析着手,提出了故障选线新算法与选线步骤,然后通过实例仿真证验证了该算法的正确性与合理性。更多还原

【Abstract】 The excellence of wavelets transform is frequency-division,which can separate different frequency compositions from signal.Then it reflects the time-domain characteristic of the transient-state fault signal in some frequency-domain more clearly.When non-direct-ground system line-to-ground fault happens,the amplitude of zero sequence current on the fault line is bigger than normal line,but the polar is opposite.So it’s useful for the proposal of fault line location algorithm based on wavelets transform.The paper researches the wavelets analysis of fault information and puts forward the new algorithm and process of fault line location.Then it validates the correctness and rationality of this algorithm by an example simulation.更多还原