10 kV智能变电站避雷器持续运行状态检测方法研究

Research on Continuous Operation State Detection Method of Arrester in 10 kV Intelligent Substation

针对避雷器运行状态检测设备精度限制、环境干扰等原因导致的检测不及时、检测效果不佳等问题,设计10kV智能变电站避雷器持续运行状态检测方法。结合奇异谱分析和滑动窗口方法,对10kV智能变电站避雷器泄漏电流作去噪处理。通过傅里叶级数分解去噪后的避雷器泄漏电流和运行电压,得到避雷器的泄漏电流分量。结合泄漏电流分量建立避雷器运行状态检测装置,实现运行状态检测。试验结果表明,所提方法对避雷器运行电流的去噪能力较好;在运行50min后,避雷器的运行电流稳定在26mA;在运行29min后,避雷器的运行电压稳定在60V;电流、电压的检测值与实测值误差较小。该方法的应用可以实现对变电站智能化、自动化的检测和管理,提高变电站运行安全性和稳定性。

Aiming at the problems of untimely detection and poor detection effect caused by the precision limitation of arrester operation state detection equipment and environmental interference,etc.,the continuous operation state detection method of arrester in 10 kV intelligent substation is designed.Combining singular spectrum analysis and sliding window method,the leakage current of 10 kV intelligent substation arrester is denoised.The leakage current component of arrester is obtained by decomposing the denoised arrester leakage current and operating voltage through Fourier series.The arrester operating state detection device is established by combining the leakage current component to realize the operating state detection.The test results show that the proposed method has good denoising ability for arrester operation current;after 50 min of operation,the arrester operation current is stabilized at 26 mA;after 29 min of operation,the arrester operation voltage is stabilized at 60 V;the error between the detected value of the current and the voltage and the actual measured value is small.The application of the method can realize intelligent and automatic detection and management of substation,and improve the safety and stability of substation operation.