基于概率潮流法的含分布式光伏的配电网电压状态评估  

Distribution network voltage state assessment with distributed generation based on probabilistic power flow method

作　　者：毛锐 袁康龙[2] 钟杰峰[2] 陈思思 林创 MAO Rui;YUAN Kanglong;ZHONG Jiefeng;CHEN Sisi;LIN Chuang(Zhaoqing Power Supply Bureau of Guangdong Power Grid Corporation,Zhaoqing 526000,China;China Energy Construction Group Guangdong Electric Power Design and Research Institute Co.,Ltd.,Guangzhou 510660,China)

机构地区：[1]广东电网公司肇庆供电局,广东肇庆526000 [2]中能建广东省电力设计研究院有限公司,广东广州510660

出　　处：《电力系统保护与控制》2019年第2期123-130,共8页Power System Protection and Control

基　　金：中国南方电网有限责任公司科技项目资助(031200KK52160003)~~

摘　　要：为克服高渗透分布式电源接入所导致的传统配电网运行状态评估方法存在盲区的困难,对计及分布式电源随机特性的配电网电压质量的状态定量评估方法进行研究。首先引入一种半不变量结合Gram-Charlier级数展开的概率潮流计算方法,并建立含系统电压平均越限概率、节点电压置信区间和节点电压最大越限概率指标的评估体系。然后以分布式光伏为代表,构建了其有功出力服从Beta分布的概率模型,并定义一种改进的计及光伏波动特性的光伏渗透率指标,由此定量评估不同光伏渗透率对配电网电压质量的影响。最后验证该算法用于配电网电压质量状态评估的可行性。To overcome the blind zone in the evaluation method of the operation status of the traditional distribution network caused by the high penetration of distributed power,this paper studies the state quantitative evaluation method of distribution network voltage quality which takes the random characteristics of distributed generation into account.In this paper,a method based on the invariant and Gram-Charlier series to calculate the probability power flow is introduced,and the evaluation system including the average over-limit probability of system voltage,the voltage confidence interval of node voltage and the maximum over-limit probability of node voltage is established.Then taking the distributed photovoltaic as the representative,the probabilistic model whose active output follows Beta distribution is proposed and an improved index of photovoltaic permeability that includes the photovoltaic fluctuation characteristics is defined so as to quantitatively evaluate the influence of different photovoltaic permeability on the voltage quality of the distribution network.Finally,the feasibility of this algorithm for the assessment of voltage quality status of distribution network is verified.

关 键 词：分布式光伏 电压质量 Gram-Charlier级数 概率评估 光伏渗透率 

分 类 号：TM615[电气工程—电力系统及自动化] TM714.2