摘要
故障电流相控开断技术对于提高断路器开断容量、延长断路器寿命具有重要意义,故障电流过零点的快速准确预测是相控开断的关键技术。通过对系统故障暂态进行合理的电路建模,根据电路对应的微分方程的解,指出采用复指数线性和的Prony模型是更为符合实际的故障暂态电流信号模型。在此基础上利用矩阵束算法求解Prony信号模型的参数,实现了故障电流波形恢复和过零点预测,通过对PSCAD平台下的仿真系统的故障电流的分析,验证了本文算法的有效性。
Phase-controlled interrupting technology for fault currents is significant for increasing the breaking capacity of breakers and prolonging its service life.The key problem of controlled fault interruption is the fast and accurate zero crossing prediction of the fault currents.The circuit modeling for power system fault transient behavior is done.According to the solution of the differential equations corresponding to the circuit,the Prony model using complex exponential linear sums is a more practical signal model for fault transient currents.Matrix pencil algorithm is applied to solve the parameters of the Prony signal model so that the waveform recovery and zero crossing prediction of the fault currents can be realized.The effectiveness of the proposed algorithm is verified by analyzing the fault current of the simulation system on PSCAD platform.
作者
艾绍贵
杨黎明
张汉花
黄永宁
谢凡
焦在滨
AI Shaogui;YANG Liming;ZHANG Hanhua;HUANG Yongning;XIE Fan;JIAO Zaibin(State Grid Ningxia Electric Power Research Institute,Yinchuan 750001,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《智慧电力》
北大核心
2020年第2期98-103,共6页
Smart Power
基金
国家自然科学基金项目资助（51377129）~~
关键词
相控开关
零点检测
矩阵束
电路建模
信号模型
phase-controlled switching
zero crossing prediction
matrix pencil
circuit modeling
signal model
