摘要
针对XLPE电缆绝缘监测中低频叠加法电源参数对检测精度的影响问题,研究了XLPE电缆绝缘故障检测精度、选择性与低频叠加电源参数之间的关系,综合考虑低频叠加法电源幅值和频率2个因素进行实验分析。结果表明,在一定频率下,随着叠加电源幅值的降低,阻性电流成分增大,绝缘检测精度相应提高;在一定电压下,随着叠加电源频率的降低,电缆绝缘检测精度逐渐升高,低频叠加法对电缆故障的选择性越好。
In order to solve problems that power parameters of low - frequency superposition method have an effect on detection accuracy of insulation resistance in XLPE cable insulation detection, it deeply studied the relationship between the power parameters of low - fre- quency superposition and detection accuracy or fault selection of XLPE cable insulation. Then it did the experiment and simulation con- sidering the amplitude and frequency of power. The results showed that resistance current components and detection accuracy would be gradually increased with the reduction of power amplitude at a certain frequency; under a certain voltage, detection accuracy of cable insulation was increased and the frequency superposition method had a better fault selectivity while the power frequency decreased.
出处
《煤矿安全》
CAS
北大核心
2014年第1期95-97,共3页
Safety in Coal Mines
基金
国家高技术研究发展计划(863计划)资助项目(2012AA06A405)
山西省科技重大专项资助项目(20111101024)
关键词
低频电源
XLPE电缆
绝缘监测
阻性电流
检测精度
low - frequency power
XLPE cable
insulation monitoring
resistive current
detection accuracy
