用软件系统计算出有功电能、视在电能、无功电能及功率因数等参数。
It can figure out active power, apparent energy, reactive energy and power factor parameter and so on in software system.
介绍了电力系统无功电能计量的重要性，并分析了无功功率的计量原理。
The importance of reactive energy measurement was introduced and the principle of reactive power measurement was analyzed.
并联有源电力滤波器作为一种新型的谐波、无功综合补偿系统，是电能质量控制领域中的研究热点。
The study on shunt active power filter, which is a novel device compensating harmonics and reactive power current simultaneously, is the focus in the field of power quality control.
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