低压双极性直流微网故障自恢复的模糊控制方法  

Fuzzy Control Method for Low-voltage Bipolar DC Microgrid Fault Self-recovery

作　　者：陈卉 苏小玲 杨文丽 保积秀 CHEN Hui;SU Xiaoling;YANG Wenli;BAO Jixiu(Electric Power Research Institute,State Grid Qinghai Electric Power Company,Xining 810008,China;College of Water Resources and Electric Power,Qinghai University,Xining 810016,China)

机构地区：[1]国网青海省电力公司电力科学研究院,西宁810008 [2]青海大学水利水电学院,西宁810016

出　　处：《电源学报》2023年第3期83-88,共6页Journal of Power Supply

基　　金：国家重点研发计划“多能源电力系统互补协调调度与控制”资助项目(2017YFB0902200)。

摘　　要：为了提高低压双极性直流微网故障检测和诊断能力,研究了低压双极性直流微网故障自恢复控制方法。首先提取低压双极性直流微网故障特征,分析低压双极性直流微网的输出稳定性特征,估计直流微网故障自恢复参数。再对低压双极性直流微网故障控制参数优化求解,根据参数求解结果,进行故障自恢复控制的状态寻优。通过直流多馈入误差补偿方法进行低压双极性直流微网故障自恢复的模糊控制,在此基础上进行参数辨识及收敛性控制,以此提高直流微网故障自恢复控制的自适应性和参数估计能力。仿真结果表明,采用该方法进行直流微网故障自恢复控制的输出稳定性较好,计算模糊度较低,故障检测精度较高,最高达到99%,提高了直流微网故障自恢复能力和故障检测能力。To improve the fault detection and diagnosis capability of a low-voltage bipolar DC microgrid,its fault self-recovery control method is studied.First,its fault characteristics are extracted,its output stability characteristics are analyzed,and the fault self-recovery parameters of the DC microgrid are estimated.Then,its fault control parameters are optimized,and the state optimization under the fault self-recovery control is perfonned according to the solution results of parameters.The fuzzy control of low-voltage bipolar DC microgrid fault self-recovery is carried out by the DC multi-infeed error compensation method.On this basis,parameter identification and convergence control are carried out to improve the adaptability and parameter estimation capability of DC microgrid fault selPrecovery control.Simulation results show that the output stability of DC microgrid fault self-recovery control is satisfying,the fuzzy degree of calculation is low,and the fault detection accuracy is high(e.g.,maximum of 99%),indicating that the DC microgrid fault self-recovery and fault detection capability is improved.

关 键 词：低压双极性 直流微网 自恢复控制 故障检测 

分 类 号：TM464[电气工程—电器]