基于换流器π型等效模型的交直流混合配电网潮流计算  

Power flow calculation of AC/DC hybrid distribution network based on equivalentπ-model of converter

作　　者：张明 马洲俊 王勇 蒋贤强 ZHANG Ming;MA Zhoujun;WANG Yong;JIANG Xiangqiang(Nanjing Power Supply Company, State Grid Jiangsu Electric Power Co.,Ltd., Nanjing 210019, China;College of Energy and Electrical Engineering, Hohai University, Nanjing 210019, China;Nanjing Nanrui Jibao Electric Co.,Ltd.,Nanjing 211106,China)

机构地区：[1]国网江苏省电力有限公司南京供电公司,江苏南京210019 [2]河海大学能源与电气学院,江苏南京210098 [3]南京南瑞继保电气有限公司,江苏南京211106

出　　处：《电力科学与技术学报》2020年第2期30-37,45,共9页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(51377021);国网江苏省电力有限公司科技项目(J2016043)。

摘　　要：交流配电网本身具有三相不平衡特性,并且可与直流配电网通过AC/DC换流器相连形成交直流配电网。该文针对AC/DC换流器提出一种新型的π型等效模型,并建立一组用于描述包含三相交流部分和直流部分的功率平衡方程。交流网络以及直流网络采用导纳矩阵形式描述,π型等效模型使得AC/DC换流器可以包含在节点导纳矩阵中,形成整个网络的节点导纳矩阵。结合换流器模型和网络方程,该文给出包含三相交流线路和直流线路的潮流计算方法,并采用案例进行验证。The AC distribution network has three-phase unbalanced characteristics and can be connected with DC networks to form a AC/DC hybrid grid.This paper proposes a new type ofπ-model for the AC/DC converter and establishes a set of power balance equations to describe three-phase AC and DC sections.The AC and DC network is described by admittance matrix.The node admittance matrix of the whole network is then set up since the AC/DC converter can be included in the matrix by aπequivalent model.Combining the converter model and the network equations,a power flow calculating method including three-phase AC line and DC line is proposed and verified with cases.

关 键 词：配电网 换流器 π型等效模型 潮流计算 

分 类 号：TM712[电气工程—电力系统及自动化]