CAJ | 학술논문

对420 kV电网开断并联电抗器产生的过电压情况进行分析，对三种常用限制截流过电压的保护装置进行介绍。实验引入理想的电弧模型，结合Emtp仿真结果，表明系统通过加入并联电阻和避雷器保护方式后，并联电抗器开断过电压得到明显抑制，可以将开断过电压限制在线路额定电压1倍以内。分析结果为超高压输电线路的稳定运行提供有价值的指导参考。
대420 kV전망개단병련전항기산생적과전압정황진행분석，대삼충상용한제절류과전압적보호장치진행개소。실험인입이상적전호모형，결합Emtp방진결과，표명계통통과가입병련전조화피뢰기보호방식후，병련전항기개단과전압득도명현억제，가이장개단과전압한제재선로액정전압1배이내。분석결과위초고압수전선로적은정운행제공유개치적지도삼고。
This paper analyzes the 420 kV shunt reactor breaking over-voltage.Three common protectors for limiting cut-off over-voltage are introduced.The ideal arc model introduced in the experiment,combined with Emtp simulation result,indicates that the shunt reactor breaking over-voltage is suppressed to a great extent when the parallel resistor and the arrester are added to the system,so that the breaking over-voltage can be limited to a value below the rated voltage of the line.The analysis result presents a valuable reference for stable operation of the extra-high voltage transmission line.