电工电气
電工電氣
전공전기
ELECTROTECHNICS ELECTRIC
2012年
1期
5-8,13
,共5页
回复电压%绝缘状态%无损诊断%主时间常数
迴複電壓%絕緣狀態%無損診斷%主時間常數
회복전압%절연상태%무손진단%주시간상수
return voltage%insulation condition%non-destructive diagnosis%dominant time constant
回复电压方法能有效地测量绝缘介质的极化特征量,无损诊断电力设备的绝缘状态。基于油纸绝缘介质的极化特性,利用等值电路模型建立了回复电压特征量与绝缘状态之间的关系,仿真并分析了电路参数的改变引起特征量和回复电压曲线的变化规律。仿真结果表明,回复电压主时间常数特征量能诊断不同几何电容的电力设备的绝缘状态,是诊断绝缘状态的有效特征量。
迴複電壓方法能有效地測量絕緣介質的極化特徵量,無損診斷電力設備的絕緣狀態。基于油紙絕緣介質的極化特性,利用等值電路模型建立瞭迴複電壓特徵量與絕緣狀態之間的關繫,倣真併分析瞭電路參數的改變引起特徵量和迴複電壓麯線的變化規律。倣真結果錶明,迴複電壓主時間常數特徵量能診斷不同幾何電容的電力設備的絕緣狀態,是診斷絕緣狀態的有效特徵量。
회복전압방법능유효지측량절연개질적겁화특정량,무손진단전력설비적절연상태。기우유지절연개질적겁화특성,이용등치전로모형건립료회복전압특정량여절연상태지간적관계,방진병분석료전로삼수적개변인기특정량화회복전압곡선적변화규률。방진결과표명,회복전압주시간상수특정량능진단불동궤하전용적전력설비적절연상태,시진단절연상태적유효특정량。
Return voltage measurement is a non-destructive electrical insulation diagnostic method, which can effectively diagnose condition of oil-paper insulation equipment. This paper established the relationship between return voltage characteristic quantities and insulation condition using equivalent circuit model based on dielectric polarization characteristics. The change laws of return voltage curve caused by variation of circuit parameters were simulated and analyzed. Simulation results show that dominant time constant is an effective characteristic quantity for diagnosing insulation condition of power equipment with different geometric capacitance.