配电变压器储能式短路冲击试验方法研究及应用  

Study and Application of Storage Energy Short Circuit Impulse Test Method of Distribution Transformer

作　　者：牛勃 吴旭涛 刘光伟 马逊 盛志平 徐玉华 NIU Bo;WU Xutao;LIU Guangwei;MA Xun;SHENG Zhiping;XU Yuhua(Power Research Institute of State Grid Ningxia Power Co.,Yinchuan 750001,China;North China Electric Power ResearehInstitute,Beijing 100053,China;State Grid Beijing Electric Power Company Maintenance Branch,Beijing 100075,China;Suzhou Industrial Park Haiwo Technology Co.,Ltd.,Jiangsu Suzhou 215000,China)

机构地区：[1]国网宁夏电力有限公司电力科学研究院,银川750001 [2]国网冀北电力科学研究院,北京100053 [3]国网北京市电力公司检修分公司,北京100075 [4]苏州工业园区海沃科技有限公司,江苏苏州215000

出　　处：《高压电器》2021年第2期166-171,共6页High Voltage Apparatus

摘　　要：配电变压器进行短路冲击试验过程中需要较大的瞬时能量,若采用专用线路以及发电机组的冲击方式需要同步开关、调节阻抗、发电机以及专用线路等,不仅现场可操作性低,同时存在影响系统稳定性的风险。为解决上述配电变压器短路冲击中存在的问题,文中基于变压器、储能电容器与电力电子变换装置,提出了配电变压器储能式短路冲击试验方法,并在此基础上设计了一套配电变压器储能式短路冲击试验系统,实现了短路冲击试验状态量的快速调节,并通过同类型储能冲击装置的串并联完成冲击容量的提升。通过仿真以及现场试验,文中所提设计配电变压器短路冲击试验系统大幅度降低了配电变压器短路冲击对电源侧容量的要求,现场试验中具有较好的可操作性。A large amount of instantaneous energy for the distribution transformer is needed during the short-circuitimpulse test.In case of needing dedicated circuit,the impulse mode of generating unit needs synchronous switch,ad-justable impedance,generator and dedicated circuit,the site operation at site is not only low,but also has the risk ofaffecting the system stability.For solving the problem existed in the short circuit impulse of above distribution trans-former,in this paper,the storage short-circuit impulse test method for distribution transformer is proposed based ontransformer,energy storage capacitor and power electronic converter and,on this basis,a set of storage energy shortcircuit impulse test system for distribution transformer is designed,the fast adjustment of short circuit test impulsetest state is achieved and the capacity improvement is completed by the series and parallel connection of the sametype of energy storage impulse device.It is shown by the simulation and site test that the short circuit impulse test sys-tem of the distribution transformer proposed in this paper reduces greatly the requirement of short circuit impulse ofdistribution transformer to the capacity of power side and has good operational performance in the site test.

关 键 词：储能式短路冲击试验 配电变压器 储能高压变频器 短时耐受电流 

分 类 号：TM421[电气工程—电器]