摘要
对SMC、BMC、GPO-3、环氧树脂复合材料在热氧老化前后的局部放电特性进行研究,对比分析未老化和经过热氧老化的4种复合绝缘材料在不同工频电压下的介电特性和局部放电特性。结果表明:随着外施电压的升高,当达到或超过材料的局部放电起始电压后,4种复合绝缘材料呈现不同的局部放电特性和PRPD谱图演变规律;经过老化后4种材料的起始局部放电电压均有所提高,局部放电量随外施电压升高而呈现不同的变化规律,放电相位和放电密度变化较小。对于材料的绝缘性能评估应综合考虑不同材料在不同运行条件下局部放电的共性和差异。
The partial discharge （PD） characteristics of SMC, BMC, GPO-3, and epoxy resin composite material before and after thermal oxidative ageing were studied. The dielectrical properties and partial discharge characteristics of four composite insulating materials before and after thermal oxidative ageing under different frequency voltages were compared and analyzed. The results show that with the increase of applied voltage, when the voltage attains or exceeds the partial discharge inception voltage, the four composite insulation materials show different PD characteristics and PRPD spectra evolution patterns. After ageing, the partial discharge inception voltage of four materials increases, and the discharge amplitude of PD varies with the increase of applied voltage, but the PD phase and discharge density change little. The ＂common and difference of partial discharge of different materials under different operating conditions should be considered in the evaluation of insulating properties of materials.
出处
《绝缘材料》
CAS
北大核心
2016年第2期49-56,共8页
Insulating Materials
基金
国家自然科学基金资助项目(51407026)
江苏省电力公司科技项目(J2014035)
关键词
复合绝缘材料
PRPD谱图
热老化
局部放电
composite insulating materials
PRPD
thermo oxidative ageing
partial discharge
