三相四线制系统负序模型及不平衡源责任计算研究  

Study on the Negative Sequence Model of Three-phase and Four-wire System and Responsibility Calculation of Unbalance Source

作　　者：贾秀芳[1] 黎杰[1] 肖楚鹏 肖湘宁[1] JIA Xiufang;LI Jie;XIAO Chupeng;XIAO Xiangning(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China;Nari（Wuhan）Electrical Equipment and Engineering Energy Efficiency Evaluation Center,Wuhan 430074,China;Nari Group Corporation（State Grid Electric Power Research Institute）,Nanjing 210003,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]南瑞(武汉)电气设备与工程能效测评中心,武汉430074 [3]南瑞集团公司(国网电力科学研究院),南京210003

出　　处：《电力电容器与无功补偿》2018年第4期117-123,共7页Power Capacitor & Reactive Power Compensation

基　　金：国家电网公司科技项目(0711-140TL24311163)

摘　　要：为量化三线四线制系统中系统侧和用户侧不平衡源在公共连接点(PCC)处的不平衡责任,定义了系统侧、用户侧及各个用户的负序电压责任指标,研究了三相四线制系统的等效负序模型,确定出模型中各等效参数的求取方法,进而实现了系统侧的等效电压源、输电线路和用户侧各负荷的负序电压责任划分。分别在等效电压源对称、输电线路对称,等效电压源对称、输电线路不对称,等效电压源不对称、输电线路对称,等效电压源不对称、输电线路不对称4种情况下,对仿真算例中的等效电压源、输电线路、负荷进行了负序电压责任计算,其结果验证了所提方法的准确性和可行性。For quantifying unbalance responsibility of the unbalance source of the system and user side in common joint point system of the system in the three-phase and four-wire system,the negative sequence voltage responsibility index for the system side,user side and each user is defined. The equivalent negative sequence model of three-phase four-wire system is studied and the evaluating method of each equivalent parameters of the model is defined,and then the responsibility division of equivalent voltage source of the system side,and negative sequence voltage of the transmission line and each load of the user side. The negative sequence voltage responsibility calculation for the equivalent power supply,transmission line and load in the simulation example is performed at such four cases as symmetrical of equivalent power supply,transmission line and equivalent voltage source,asymmetrical of transmission line,equivalent voltage source,symmetrical of equivalent voltage source and asymmetrical of transmission line,and correctness and feasibility of the proposed method is verified by the result.

关 键 词：不平衡责任 负序电压 负序模型 电能质量 

分 类 号：TM732[电气工程—电力系统及自动化]