高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2012年
1期
1-8
,共8页
唐炬%刘永刚%裘吟君%袁静帆
唐炬%劉永剛%裘吟君%袁靜帆
당거%류영강%구음군%원정범
针-板电极%局部放电%光测法%脉冲电流测量%视在放电量%一次积分值%线性关系
針-闆電極%跼部放電%光測法%脈遲電流測量%視在放電量%一次積分值%線性關繫
침-판전겁%국부방전%광측법%맥충전류측량%시재방전량%일차적분치%선성관계
needle-plate electrode%partial discharge%optical method%pulse current measurement%apparent charge quantity%first integral value%linear relationship
为解决电气设备局部放电（PD）光测法定量检测的问题,在深入分析PD光测法信号一次积分值物理意义的基础上,推导出信号一次积分值与视在放电量成线性关系。实验结果表明：针-板电极空气间隙在不同极性、不同距离下的PD光测法信号一次积分值与视在放电量均成线性关系,斜率大小是正针负板大于负针正板,且针-板电极间隙距离越大斜率越大。另外,随着施加电压升高,PD脉冲重复率增大,信号一次积分值和视在放电量分布区间均变宽,且分布区间的最大值和最小值均变大。因此,可以用光测法信号获取PD视在放电量,但需对不同极性和不同间隙距离进行一定的校正。
為解決電氣設備跼部放電（PD）光測法定量檢測的問題,在深入分析PD光測法信號一次積分值物理意義的基礎上,推導齣信號一次積分值與視在放電量成線性關繫。實驗結果錶明：針-闆電極空氣間隙在不同極性、不同距離下的PD光測法信號一次積分值與視在放電量均成線性關繫,斜率大小是正針負闆大于負針正闆,且針-闆電極間隙距離越大斜率越大。另外,隨著施加電壓升高,PD脈遲重複率增大,信號一次積分值和視在放電量分佈區間均變寬,且分佈區間的最大值和最小值均變大。因此,可以用光測法信號穫取PD視在放電量,但需對不同極性和不同間隙距離進行一定的校正。
위해결전기설비국부방전（PD）광측법정량검측적문제,재심입분석PD광측법신호일차적분치물리의의적기출상,추도출신호일차적분치여시재방전량성선성관계。실험결과표명：침-판전겁공기간극재불동겁성、불동거리하적PD광측법신호일차적분치여시재방전량균성선성관계,사솔대소시정침부판대우부침정판,차침-판전겁간극거리월대사솔월대。령외,수착시가전압승고,PD맥충중복솔증대,신호일차적분치화시재방전량분포구간균변관,차분포구간적최대치화최소치균변대。인차,가이용광측법신호획취PD시재방전량,단수대불동겁성화불동간극거리진행일정적교정。
In order to solve the problem of the optical method for detecting partial discharge（PD） in the electric equipment in quantity,based on deeply analyzing the physical interpretation of first integral value of signal of the optical method,we obtained a lineal mathematical expression between the first integral value of signal of the optical method and apparent charge quantity.The results of the experiment and verification indicate that,the relationships between the apparent charge quantity of PD and the first integral value of signal of the optical method are all linear at different polarity PD and clearance distance from needle plate electrode in the air,but the slope of the lineal relationship at positive needle and negative plate electrode PD is higher than that at negative needle and positive plate electrode PD,and with the clearance distance from needle plate electrode longer,the slope of the lineal relationship is also higher.Moreover,with the applied voltage greater,as the repetition rate of PD pulse increases,the distribution range of the first integral value of signal of the optical method and apparent charge quantity both become wider,.upper and lower boundary of them are also bigger.Thus,if calculating apparent charge quantity of PD by the obtained signal of the optical method,it is necessary to get linear relationships between the apparent charge quantity of PD and the first integral value of signal of the optical method at different polarity PD and clearance distance from needle plate electrode.
