特高压换流站消防应急电源供电电路调频故障信号辨识方法  

Identification method of frequency modulation fault signal of fire emergency power supply circuit in UHV converter station

作　　者：徐志军 贺光宇 潘青松 Xu Zhijun;He Guangyu;Pan Qingsong(UHV Construction Branch of State Grid Co.,Ltd.,Beijing,100032,China;East China Electric Power Design Institute Co.,Ltd.,China Electric Power Engineering Consulting Group,Shanghai,200001,China)

机构地区：[1]国家电网有限公司特高压建设分公司,北京100032 [2]中国电力工程顾问集团华东电力设计院有限公司,上海200001

出　　处：《机械设计与制造工程》2024年第8期91-95,共5页Machine Design and Manufacturing Engineering

摘　　要：应急电源供电电路发生调频故障时会出现抖动问题,导致电极振荡失效,为此研究特高压换流站消防应急电源供电电路调频故障信号辨识方法。利用干扰区分直流网失效特性,提取双极供电故障特征。采用模态分解法分解调频故障信号模态,结合小波变换奇异熵识别电路调频故障信号。由实验结果可知,该方法在模拟两种故障时,所呈现的电压波动幅度与实际发生的故障幅度高度一致,具有精准辨识效果。When the frequency modulation fault occurs in the emergency power supply circuit,there will be shaking problems,leading to electrode oscillation failure.Therefore,a method for identifying the frequency modulation fault signal of the fire emergency power supply circuit in the ultra-high voltage converter station is studied.Using interference to distinguish the failure characteristics of DC networks and extract the fault features of bipolar power supply.Using modal decomposition method to decompose the frequency modulation fault signal modes,combined with wavelet transform singular entropy to identify circuit frequency modulation fault signals.From the experimental results,it can be seen that the voltage fluctuation amplitude presented by this method when simulating two types of faults is highly consistent with the actual fault amplitude,and has accurate identification effect.

关 键 词：特高压换流站 消防应急电源 供电电路 调频故障 信号辨识 

分 类 号：TM406[电气工程—电器]