低压动态无功补偿装置的质量鉴定

Micro Evidence Technology in the Quality Identification for Low Voltage Dynamic Reactive Power Compensation Device

目前为了改善电能质量,低压动态无功补偿装置等无功补偿技术装置在电力供电系统中的应用越来越普及。选择合理的补偿装置,可以做到最大限度地减少网络的损耗,提高系统的运行电压和稳定水平,使电网质量得到提高。反之,若选择或使用不当,可能造成供电系统电压波动,谐波增大等诸多因素。该文针对低压动态无功补偿装置的过电烧毁现象,借助电子探针和扫描电镜X射线能谱定量分析(SEM/EDS)以及X射线显微系统等微量物证分析手段,从实物烧坏状态分析以及微量物证失效分析角度对涉案设备进行了过电压分析。同时针对过电压现象进行了补偿电容器选型计算,计算结果表明系统(配电网)产生了过补偿。过补偿的结果就是系统(配电网)形成过电压。

At present,in order to improve the quality of electric energy,low voltage dynamic reactive pow-er compensation device is becoming more and more popular in the power supply system.Choosing compensation device,can minimize the loss of the network,improving the operating voltage and stability of the system,the quality of the power quality.If choose or use undeserved,may cause voltage fluctuation, harmonic increaseing etc. in the power system.In the paper,aiming at the device has been burn by over-voltage,with the micro evidence analysis means such as electron microscope and scanning electron mi-croscope and X ray energy spectrum quantitative analysis （SEM/EDS） and X-ray microscope,we con-ducted the over voltage analysis from the angle of physical burnout status and micro evidence analysis. At the same time,compensation capacitor selection calculation results shows that the system（power dis-tribution） had produced overcompensation.Overvoltage was caused by overcompensation.