消减变压器中性点直流电流抑制直流偏磁的电位补偿方法  

A Potential Compensation Method to Eliminate Transformer Neutral Direct Current Produced by HVDC

作　　者：马志强 

机构地区：[1]广东省电机工程学会,广州510600

出　　处：《广东电力》2007年第5期1-5,共5页Guangdong Electric Power

摘　　要：提出了一种基于电位补偿原理的消减变压器中性点直流电流,抑制直流偏磁的新方法,应用网络分析算法推演了以电位补偿抑制变压器中性点直流电流的机理,给出了电位补偿装置的原理性结构和装置参数整定原则,将电位补偿法与目前采用的小电阻限流法、电容隔直法、中性点注入反向电流限制法进行了比较,最后用算例分析说明了电位补偿法的有效性。This paper presents a new potential compensation method to eliminate the neutral direct current in transformers and restrain DC magnetic biasing during high-voltage direct-current transmission （HVDC）. The network analysis algorithm is used to explain the mechanism of the method, the principle equipment based on this method and its parameter setting fundamentals offered. The potential compensation method is compared with presently used small-resistance current-limiting method, capacitance DC-blocking method and the restraining method by injecting reverse current at neutral. Finally an example is cited to demonstrate the validity of the potential compensation method.

关 键 词：电力系统 直流输电 变压器直流偏磁 中性点直流电流 电位补偿 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论] TM711[自动化与计算机技术—计算机科学与技术]