UPFC系统的变压器差动保护分析  

Transformer differential protection in UPFC system

作　　者：吴奕 顾乔根[2,3] 崔玉 黄海东 孙仲民 王业 WU Yi;GU Qiaogen;CUI Yu;HUANG Haidong;SUN Zhongmin;WANG Ye(State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 210024,China;NR Electric Co.,Ltd.,Nanjing 211102,China;NARI Group(State Grid Electric Power Research Institute)Co.,Ltd.,Nanjing 211106,China)

机构地区：[1]国网江苏省电力有限公司,江苏南京210024 [2]南京南瑞继保电气有限公司,江苏南京211102 [3]南瑞集团(国网电力科学研究院)有限公司,江苏南京211106

出　　处：《电力工程技术》2021年第1期99-106,共8页Electric Power Engineering Technology

基　　金：国家自然科学基金资助项目(51707090)。

摘　　要：并联变压器和串联变压器是统一潮流控制器(UPFC)的核心交流器件,差动保护作为这两类变压器的主保护,受UPFC特殊的运行工况影响,在不同的运行条件和不同类型的故障下会表现出不同的特性。为分析评估UPFC中各类故障对差动保护的影响,文中以实际UPFC工程的控制系统为基础,讨论了各类故障下可能对并联、串联变压器差动保护灵敏性及可靠性产生影响的因素;根据变压器区内外典型故障的仿真结果,分析了差动保护在此类故障下的行为特征,形成差动保护的适应性分析,验证了保护配置的有效性;从保护设备的角度出发,讨论了阀控制保护与交流继电保护的关系,从防误和防拒两方面为UPFC工程的交流继电保护实施提供技术参考。Both parallel transformer and series transformer are core AC devices of unified power flow controller(UPFC),and special operating conditions of UPFC can easily affect transformer differential protection,which is the main protection for these two types of transformers.The differential protection could have various manifestations under different operation conditions and varied faults.In order to evaluate the affection for differential protection from different kinds of faults,the factors that may impact the sensitivity and reliability of differential protection are discussed when faults happen based on the control system of actual UPFC project.According to the simulation results of typical internal and external faults,the behavioral characteristics of differential protection are analyzed,and the adaptability analysis of differential protection is formed as well.The relationship between valve control protection and AC relay protection in aspect of protecting equipment are also discussed.A technical reference is provided for the implementation of AC relay protection of the UPFC project in terms of anti-misoperation and anti-rejection.

关 键 词：统一潮流控制器(UPFC) 串联变压器 并联变压器 差动保护 适应性分析 

分 类 号：TM715[电气工程—电力系统及自动化]