Research on Thermal Stability Performance of Power Capacitor Under Power Frequency and Harmonic Condition
There are many researches on thermal stability of power capacitors under AC power frequency,but at present there is no related report on the thermal stability performance under superposition of power frequency and harmonics.For studying the temperature rise of power capacitor in actual operating harmonic environment,the har-monic loading circuit is set up by analyzing the relationship between the power loss and the harmonic frequency.It is concluded at given harmonic voltage and harmonic current by the project,the comparison of thermal stability test at rated voltage of the capacitor specified by the standard as well as the thermal stability test at the power frequency with single harmonic voltage that when the harmonic contents of the system reaches a certain extent,the thermal ef-fect of the power capacitor at the rated voltage taken as per the standard can not cover that at the actual operation harmonics,and the thermal effect of IN=∑I2n needs to be considered.
power capacitorharmonicslossthermal stability testtemperature rise
万方数据
维普
