摘要
现有的介质损耗因数计算未考虑谐波的影响,为此提出一种能体现谐波影响的介质损耗因数新定义,从而更合理地评估电力设备的运行状态。分别采用解耦算法和基于工频的近似算法计算新定义下的介质损耗因数,并应用LabVIEW软件仿真分析工频波动对测量精度的影响,仿真结果显示基于工频的近似算法准确性更高。最后提出此方法在电缆绝缘监测中的应用方案,指出仅关注介质损耗因数的长期发展趋势可简化计算和减小外界干扰的影响。
Existing dielectric power factor calculation dose not consider affection of harmonic, therefore, this paper presents a new definition of dielectric power factor which reflects influence of harmonic and reasonably evaluates operational condi- tion of power equipments. By using decoupling algorithm and approximate calculation based on power frequency, it com- putes dielectric power factor and with the help of LabVIEW software it simulates influence of power frequency vibration on measuring accuracy. The simulating result shows that veracity of approximate calculation based on power frequency is high- er. It suggests an application program for this method in monitoring cable insulation and explains that focus on long term de- velopment of dielectric power factor can simplify calculation and decrease impact of outside disturbance.
出处
《广东电力》
2012年第11期96-99,111,共5页
Guangdong Electric Power
关键词
介质损耗因数
解耦算法
基于工频的近似算法
绝缘
状态监测
dielectric loss factor
decoupling algorithm
approximate calculation based on power frequency
insulate
condi-tion monitoring
