任何一种产品，都具有它的质量指标，电能也有一定的质量指标，只有当送到用户的电能符合质量指标时，它才能发挥最佳的效益。
介绍了电能质量指标的含义及其一些计算方法。
This paper introduces the index definition of power quality and the calculation method.
最后，电能质量监测系统对相关电能质量指标进行了测量实验。
Finally, the paper verified the measurement accuracy of the power quality monitoring system by experiment.
对电能质量指标偏离产生的危害进行经济评估，有助于合理采用相应的改善措施。
The economic evaluation on the damage caused by index deviation of the power quality is helpful to adopt proper improving measures.
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