常熟理工学院学报
常熟理工學院學報
상숙리공학원학보
JOURNAL OF CHANGSHU INSTITUTE OF TECHNOLOGY
2014年
2期
73-78
,共6页
系统对地电容测量%单相接地故障%零序电压表达式%零序电压振荡频率
繫統對地電容測量%單相接地故障%零序電壓錶達式%零序電壓振盪頻率
계통대지전용측량%단상접지고장%령서전압표체식%령서전압진탕빈솔
system-to-ground capacitance measurement%single-phase ground fault%expression of the zero-se-quence voltage%oscillation frequency of the zero-sequence voltage
分析了电力系统对地电容的精确测量对系统安全运行的重要性及单相接地发生和消失后的等效电路，在此基础上推导了单相接地故障消失后零序电压的表达式。总结了零序电压振荡频率（周期）与系统对地电容的关系，并据此关系推出了可用于精确测量系统对地电容的方法。最后通过在Matlab/Simulink中搭建仿真模型，对所提方法进行了验证，仿真结果表明，所提方法可精确地测量系统对地电容的大小。
分析瞭電力繫統對地電容的精確測量對繫統安全運行的重要性及單相接地髮生和消失後的等效電路，在此基礎上推導瞭單相接地故障消失後零序電壓的錶達式。總結瞭零序電壓振盪頻率（週期）與繫統對地電容的關繫，併據此關繫推齣瞭可用于精確測量繫統對地電容的方法。最後通過在Matlab/Simulink中搭建倣真模型，對所提方法進行瞭驗證，倣真結果錶明，所提方法可精確地測量繫統對地電容的大小。
분석료전력계통대지전용적정학측량대계통안전운행적중요성급단상접지발생화소실후적등효전로，재차기출상추도료단상접지고장소실후령서전압적표체식。총결료령서전압진탕빈솔（주기）여계통대지전용적관계，병거차관계추출료가용우정학측량계통대지전용적방법。최후통과재Matlab/Simulink중탑건방진모형，대소제방법진행료험증，방진결과표명，소제방법가정학지측량계통대지전용적대소。
This paper firstly analyzes the importance of the accurate measurement of the power system on the ground capacitance of the safe operation, and then analyzes the equivalent circuit after the occurrence and disap-pearance of single-phase grounding, and on this basis derives an expression of the zero-sequence voltage after a single-phase ground fault disappears. Summed up by the observation of the expression of the zero-sequence volt-age oscillation frequency (period) and the system capacitance to ground relationship, this relationship can be used for accurate measurement system capacitor. The proposed method can be used in Matlab / Simulink to build simulation models. The simulation result shows that the proposed method can accurately measure the size of the system capacitance to the ground.
