摘要
分布式光伏的接入会对配电网脆弱性水平造成较大的影响,继而影响配电网的安全稳定运行。在分析分布式光伏功率特性的基础上,结合配电网节点静态能量函数模型和负荷转移系数相关理论,提出一种可反映配电网节点状态和结构的脆弱性评估模型。建立含分布式光伏接入的配电网仿真计算模型,对光伏不同并网容量和多个光伏不同并网位置对配电网脆弱性的影响规律进行研究。结果表明,随着光伏并网容量的增大,其对配电网脆弱性的影响呈现先逐渐增大后趋于稳定的态势,稳定后脆弱性最小值降低了约24%、最大值增大了约31%,且多个分布式光伏的并网节点越靠近配电网末端,并网距离越小,配电网脆弱性受到的影响越大。
The access of distributed photovoltaic(PV)will have a great impact on the vulnerability level of the distribution network,and then affect the safe and stable operation of the distribution network.On the basis of analyzing the power characteristics of distributed PV,combined with distribution network node static energy function model and load transfer coefficient correlation theory,a comprehensive vulnerability assessment model that can reflect the state and structural of distribution network nodes is proposed.The simulation calculation model of distribution network including distributed PV access is established to study the influence of different grid-connected capacity and different grid-connected positions on the vulnerability of distribution network.The results show that with the increase of PV grid-connected capacity,its impact on the vulnerability of distribution network gradually increases firstly,and then tends to be stable,the minimum value of vulnerability decreases by about 24%and the maximum value increases by about 31%.Moreover,the closer grid-connected nodes of multiple distributed photovoltaics are to the end of the distribution network,the smaller grid-connected distance,and the greater impact on the vulnerability of the distribution network.
作者
郭浩
田亮
王文琦
李波
杨佳乐
GUO Hao;TIAN Liang;WANG Wenqi;LI Bo;YANG Jiale(Baoding Power Supply Branch of State Grid Hebei Electric Power Co.,Ltd.,Baoding 071000,China)
出处
《微型电脑应用》
2024年第4期112-115,共4页
Microcomputer Applications
关键词
分布式光伏
配电网
脆弱性
静态能量函数
负荷转移系数
distributed photovoltaic
distribution network
vulnerability
static energy function
load transfer coefficient
