光伏系统直流电缆故障检测及其定位研究  

STUDY ON DETECTION AND LOCATION METHOD OF DC CABLE FAULT FOR PHOTOVOLTAIC SYSTEM

作　　者：吴春华[1] 曹明杰 李智华[1] 汪飞[1] Wu Chunhua;Cao Mingjie;Li Zhihua;Wang Fei(School of Mechatronics Engineering and Automation,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学机电工程与自动化学院,上海200444

出　　处：《太阳能学报》2021年第5期267-275,共9页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51677112)。

摘　　要：针对大型光伏电站中直流电缆发生故障难以检测和定位的问题,提出一种基于传输线等效分布参数模型的时域反射法,并通过扩展频谱的方式提高其抗干扰性。研究光伏电站电缆发生故障的原因和类型,对拓展频谱和时域反射进行理论分析,通过仿真和实验验证理论的正确性,并结合不同工况分析该方法的可行性及其抗干扰能力。实验结果表明所采用的方法能稳定地对光伏系统中的直流电缆故障实现迅速的在线检测以及精确的定位。A time-domain reflection method based on the transmission line equivalent distribution parameter model is proposed to cope with the difficulty in detecting and locating the fault of DC cables in large-scale photovoltaic power stations,and the anti-interference performance of this method is also improved by expanding the frequency spectrum.In this paper,the causes and types of cable faults in photovoltaic power plants are studied.The spread spectrum and time domain reflection are theoretically analyzed as well.Then the theoretical correctness is verified by simulation and experiment after analyzing the feasibility and anti-interference ability of this method in combination with different working conditions.The experimental results showed that the proposed method provides a stable way to achieve online detection and accurate location of DC cable faults in photovoltaic systems.

关 键 词：光伏电站 故障检测 故障定位 扩频通信 时域反射 抗干扰性 

分 类 号：TM615[电气工程—电力系统及自动化]