摘要
当分布式电网结构复杂时,如果在所有节点安装谐波检测装置,会使得测量准确性和经济性降低。首先综合考虑谐波监测系统中相量量测单元的可观性、系统测量冗余度、通信通道要求、设备退出等多种情况,实现谐波状态估计监测点的优化。然后,利用误差分析检出优化监测点所采集数据中可能存在的不良数据,并利用概率密度曲线判断状态估计结果是否满足精度要求,以评估谐波监测点优化方案的可行性与精确度。最后,通过仿真与算例进行了理论验证。
When the distributed grid structure is complex,if the harmonic detection device is installed in all nodes,the accuracy and economy will be reduced.The observable of PMU system,the redundancy of system measurement,communication channel requirement and equipment exit conditions are considered synthetically,and the optimization of the monitoring point of harmonic state estimation is realized.Then,the unqualified collected data of the monitoring points are checked.Next,the probability density curve is used to determine whether a state estimation results meet the accuracy requirement,and based on the results,to assess the feasibility and accuracy of the optimization scheme of harmonic monitoring.Finally,through the simulation and numerical examples,theoretical advancement is verified.
作者
江友华
陈博
田书锦
JIANG Youhua;CHEN Bo;TIAN Shujin(Shanghai University of Electric Power, Shanghai 200090,China;Liaocheng Power Supply Company, State Grid Shandong Electric Power Company, Liaocheng 253000, China)
出处
《上海电力学院学报》
CAS
2019年第1期43-52,共10页
Journal of Shanghai University of Electric Power
基金
上海市地方能力建设项目(14110500900)
关键词
分布式电网
谐波监测
相量量测单元
状态估计
distributed grid
harmonic monitor
phasor measurement unit
state estimation
