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首页> 外文会议>2015 5th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies >Fault diagnosis of substation grounding grid based on the signal distance function
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Fault diagnosis of substation grounding grid based on the signal distance function

机译：基于信号距离函数的变电站接地网故障诊断

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摘要

Good grounding condition is great important to keep the safety of staff and stable operation of electrical equipments in the substation. Electric power system is an urgent need for practical and effective diagnostic method without excavating the grounding grid and affecting the normal operation of the system, which can look for the location of corrosion and diagnose the degree of corrosion of grounding grid, so as to evaluate safety performance of grounding. This paper adopts the electromagnetic induction principle, pours the excitation current of different frequency sine wave into the grounding through CDEGS analysis software of grounding grid, simulates and analyzes the distribution of magnetic induction intensity in the surface; diagnoses the defects state of grounding grid conductors according to the change of distributional characteristics; calculates the value of the signal distance function for the distribution of magnetic induction intensity when the grounding grid conductors is in the corrosion and breakage; and finds out the specific difference of the each waveform according to the value of mutual distance, to achieve the fault diagnosis of grounding grid.
机译：良好的接地条件对于确保变电站人员的安全和电气设备的稳定运行至关重要。电力系统迫切需要一种实用，有效的诊断方法，而又不需开挖接地网而影响系统的正常运行，可以寻找腐蚀的位置并诊断接地网的腐蚀程度，从而评估安全性。接地性能。本文采用电磁感应原理，通过接地网的CDEGS分析软件将不同频率正弦波的励磁电流注入到接地中，模拟分析了表面磁感应强度的分布。根据分布特性的变化诊断接地网导体的缺陷状态；计算接地格栅导体处于腐蚀和断裂状态时信号感应强度分布的信号距离函数值；根据相互距离的值找出每个波形的比差，以实现接地网的故障诊断。

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