省级电网电压暂降评估与工业用户潜在供电点优选  

Evaluation of provincial power grid voltage sag and optimal selection of potential power supply points for industrial users

作　　者：王建勋 张逸[1] 陈晶腾 吴敏辉 WANG Jianxun;ZHANG Yi;CHEN Jingteng;WU Minhui(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;State Grid Putian Electric Power Company,Putian 351100,China;State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350001,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108 [2]国网莆田供电公司,福建莆田351100 [3]国网福建省电力有限公司,福建福州350001

出　　处：《电力自动化设备》2021年第8期201-207,224,共8页Electric Power Automation Equipment

基　　金：福建省自然科学基金资助项目(2016J01219);福州市科技计划项目(2018-G-82)。

摘　　要：针对省级电网大多节点缺乏电压暂降实测数据和评估结果,从而造成工业用户入网缺乏依据的问题,提出了仿真计算省级电网节点电压暂降指标以及优选工业用户潜在供电点的方法。为了更准确地评估节点电压暂降水平,提出了省级电网的仿真计算范围,并考虑了因仿真范围扩大而凸显的不同电压等级线路的故障率和故障类型比例的差异性;考虑10 kV电压等级线路故障,扩展电网调度部门10 kV电压等级线路的BPA模型数据,并实现自动调用BPA并行仿真计算得到电网侧的节点暂降指标;引入暂降关联成本的概念,综合考虑电网侧暂降指标、用户侧负荷暂降耐受力、暂降经济损失以及专线架设费用等因素,优选潜在供电点;通过对某省电网进行实例分析,验证了所提方法能有效避免电压暂降过评估或欠评估问题,为工业用户优选潜在供电点提供参考。Aiming at the problem that most nodes of provincial power grid are lack of measured data and evaluation results of voltage sag,which leads to the lack of basis for industrial users to enter the network,a method of simulating and calculating the voltage sag index of provincial power grid nodes and optimally selecting the potential power supply points of industrial users is proposed.In order to evaluate the voltage sag level of nodes more accurately,the simulation calculation range of provincial power grid is proposed,and the difference of fault rate and fault type ratio of lines with different voltage levels due to the expan⁃sion of simulation range is considered.Considering the faults of 10 kV voltage level lines,the BPA model data of 10 kV voltage level lines in the power grid dispatching department is extended,and the automatic call of BPA parallel simulation calculation is realized to obtain the voltage sag index of grid side nodes.The concept of voltage sag associated cost is introduced,and the potential power supply points are selected optimally by comprehensively considering factors such as the grid side voltage sag index,the user side load sag tolerance degree,the voltage sag economic loss,the installation cost of special line,and so on.Through example analysis of a provincial power grid,it is verified that the proposed method can effectively avoid the problem of over-evaluation or under-evaluation of voltage sag,which can provide a reference for industrial users to select potential power supply points.

关 键 词：省级电网 电压暂降 蒙特卡罗法 评估指标 潜在供电点优选 工业用户 

分 类 号：TM761[电气工程—电力系统及自动化]