变压器低压侧短路电流限制器仿真研究  

Simulation Study of Short-circuit Current Limiter on Low Voltage Side of Transformers

作　　者：唐震 郭垚[2] 刘泽宇 TANG Zhen;GUO Yao;LIU Zeyu(State Grid Shanxi Electric Power Research Institute,Taiyuan,Shanxi 030001,China;Shanxi University,Taiyuan,Shanxi 030013,China)

机构地区：[1]国网山西省电力公司电力科学研究院,山西太原030001 [2]山西大学,山西太原030013

出　　处：《山西电力》2021年第2期1-6,共6页Shanxi Electric Power

摘　　要：电网互联以及大容量发电机组的投运,使电网整体的短路电流水平不断提高,如果不采取限制措施对过大的短路电流进行控制,不仅对电网中断路器的开断能力是一个考验,而且对电力系统的安全稳定运行有较大的影响。基于电磁暂态仿真程序建立了变压器低压侧短路电流限制器的仿真模型,通过仿真验证了模型的有效性,同时对短路电流限制器的限流性能和不同安装方式对变压器保护的影响进行了仿真研究。The interconnection of power grids and the commissioning of large-capacity generating sets have continuously improved the overall short-circuit current level of the power grid.If no restriction measures are taken to control the excessive shortcircuit current,it will not only challenge the breaking capacity of the circuit breaker in the grid,but also have a great impact on the safe and stable operation of the power system.Based on the PSCAD/EMTDC electromagnetic transient simulation program,a simulation model of the short-circuit current limiter on the low-voltage side of the transformer is established.The simulation verifies the validity of the model.At the same time,a simulation study of the current limiting performance of the short-circuit current limiter and the impact of different installation methods on the transformer protection is also carried out.

关 键 词：短路电流限制器 断路器 变压器 继电保护 

分 类 号：TM713[电气工程—电力系统及自动化]