电压质量问题分析

Analysis of Problem of Voltage Quality

电压指标(如电压偏差、谐波电压、负序电压等)除了和用户负荷有关外,还和电网阻抗有关。当电网电压质量出现问题时,从电力用户方面查找原因并加以治理是必要的,但同时也要考核电网状况。容量较小的电网一方面承受干扰的能力较弱,另一方面,电网供电能力不足将会引发许多电压质量问题。

Voltage parameters (such as: voltage, deviation, harmonic voltage, negative-sequence voltage etc.) are related not only with power load but also with electric network impedance . When voltage quality problem appears,it is necessary to find out the reasons caused by power system and electricity user. On the one hand, the power system with insufficient supply ability is comparatively weak to withstand disturbances, and on the other hand, it may cause many voltage quality problems.