CAJ | 학술논문

针对10kV配电网多组母线电压互感器(TV)并联运行时如何安装消谐器才能有效防止单相接地消失后TV烧毁和熔断器熔断的问题，利用电磁暂态分析软件ATP-EMTP建立了两组母线TV并联运行的10kV配电网模型；通过对比分析各种消谐器安装方案对TV一次侧过电流的抑制效果，得到如下合理的安装方案：当系统发生铁磁谐振时，任何一组母线TV安装消谐器都可以有效抑制谐振过电压和过电流；当系统发生低频非线性振荡时，需要每组母线TV都安装消谐器才能很好的抑制TV一次侧过电流。针对三组、四组母线TV并联运行的情况也做了相关仿真研究，亦得到上述结论。由于TV特性、系统参数、消谐措施以及系统运行方式的差异，对于具体问题需要具体分析。
침대10kV배전망다조모선전압호감기(TV)병련운행시여하안장소해기재능유효방지단상접지소실후TV소훼화용단기용단적문제，이용전자잠태분석연건ATP-EMTP건립료량조모선TV병련운행적10kV배전망모형；통과대비분석각충소해기안장방안대TV일차측과전류적억제효과，득도여하합리적안장방안：당계통발생철자해진시，임하일조모선TV안장소해기도가이유효억제해진과전압화과전류；당계통발생저빈비선성진탕시，수요매조모선TV도안장소해기재능흔호적억제TV일차측과전류。침대삼조、사조모선TV병련운행적정황야주료상관방진연구，역득도상술결론。유우TV특성、계통삼수、소해조시이급계통운행방식적차이，대우구체문제수요구체분석。
When several bus voltage transformers ( TV) are in parallel operation in 10kV electrical power distribution system, how to choose the resonance eliminator installation program to effectively prevent TV damage and fuse failure is a problem. To deal with the issue, the model of two bus-TVs in parallel operation is built up by ATP-EMTP, and the suppression effect of different resonance eliminator installation programs on over-voltages and over-currents are analyzed, from which the reasonable program is obtained. The TV high voltage fuse blow can be effectively avoided by installing resonance eliminator on any bus TV when ferromagnetic resonance occurs. However, the eliminator needs to be installed on all bus TVs when low frequency non-liner oscillation occurs. The same program is also obtained when three and four bus-TVs are in parallel operation. Case-case analysis is need for the difference in TV excitation characteristics, system parameters, resonance eliminating methods and system operation modes.