基于节点电压灵敏度的微电网电能质量综合动态评价方法  

A comprehensive dynamic evaluation method for microgrid power quality based on node voltage sensitivity

作　　者：欧阳静[1] 潘国兵[1] 陈金鑫[1] 王振涛 柴福帅 张立彬[1] Ouyang Jing;Pan Guobing;Chen Jinxin;Wang Zhentao;Chai Fushuai;Zhang Libin(Key Laboratory of E&M,Ministry of Education&Zhejiang Province,Zhejiang University of Technology,Hangzhou 310014)

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部/浙江省重点实验室,杭州310014

出　　处：《高技术通讯》2021年第2期199-206,共8页Chinese High Technology Letters

基　　金：国家重点研发计划(2017YFA0700300);浙江省基础公益技术研究计划(LGF21E070001)资助项目。

摘　　要：针对现有电能质量评价方法在评价过程中只考虑单个电气节点,且权值固定,没有对整个系统中节点间的相互关联综合考虑,评价结果不能准确反映微电网电能质量波动的问题,提出了一种基于节点电压灵敏度的微电网电能质量综合动态评价方法。该方法针对电能质量评价过程中出现的"短板效应",建立了一种单节点电能质量实时变权重评价模型;针对微电网电能质量综合评价过程中各节点赋权的问题,提出了一种基于节点电压灵敏度的权重赋值方法。实验表明该方法可以对微电网整体的电能质量进行有效评价,评估各个节点在微电网内的重要程度,为对抗扰动能力差的节点进行电能质量治理提供了理论依据。To solve the problem that the existing power quality evaluation methods only consider a single electrical node in the process of evaluation,and the weights are fixed,there is no comprehensive consideration of the mutual correlation between nodes in the whole system,and the evaluation results can not accurately reflect the power quality fluctuation of microgrid,a comprehensive dynamic evaluation method for microgrid power quality based on node voltage sensitivity is proposed.Aiming at the ‘short board effect’ in the process of power quality evaluation,a real-time weight evaluation model of single node power quality is established,and a weight assignment method based on the sensitivity of node voltage is proposed to solve the problem of each node weight in the process of power quality comprehensive evaluation of microgrid.Experiment results show that the proposed method can effectively evaluate the overall power quality of the microgrid,evaluate the importance of each node,and provide a theoretical basis for power quality management of nodes with poor anti-disturbance capabilities.

关 键 词：电能质量综合动态评价 节点电压灵敏度 实时变权重 微电网 

分 类 号：TM711[电气工程—电力系统及自动化]