CAJ | 학술논문

在变压器经济运行过程中存在着空载合闸的现象，而在随机关合空载变压器的时候会产生幅值很大的励磁涌流，可能导致继电保护装置误动作，降低电能质量。针对此种情况，提出一种变压器软启动控制策略来有效减小励磁涌流，并基于PSCAD/EMTDC搭建的变压器空载合闸仿真模型，通过仿真算例分析，验证了变压器软启动控制策略的可行性和有效性。
재변압기경제운행과정중존재착공재합갑적현상，이재수궤관합공재변압기적시후회산생폭치흔대적려자용류，가능도치계전보호장치오동작，강저전능질량。침대차충정황，제출일충변압기연계동공제책략래유효감소려자용류，병기우PSCAD/EMTDC탑건적변압기공재합갑방진모형，통과방진산례분석，험증료변압기연계동공제책략적가행성화유효성。
There is a no-load switching phenomenon in the process of economic operation of transformers,and it will produce large amplitude of the inrush current when circuit breakers randomly close no-load transformer, and it may lead to relay protection device malfunction and reduce electric energy quality. This paper presents a soft start method,and it can effectively reduce the inrush current in transformer no-load closing. it builds the model of the transformer transformer no-load switching through PSCAD simulation software,and through the a-nalysis of simulation results,it can verify the feasibility and effectiveness of this control strategy.