变电站所用电电压偏差分析与挡位调整

Analysis of Deviation of Electric Voltage Used in Substation and Gear Adjustment

所用电电压偏差过大会严重影响电力变电站的安全稳定运行,基于此首先介绍了所用电电压质量对变电站运行可靠性的影响,然后分析了在电力系统中造成所用电电压波动较大的主要原因,并根据我国电能质量供电电压偏差标准,得出所用电线电压的波动允许范围,最后结合余姚地区3座35 kV变电站所用电电压偏高问题,通过理论分析计算得出所用变挡位的优选范围,并根据计算结果提出合理化建议。

The excessive deviation of the used voltage will seriously affect the safe and stable operation of the power substation.Based on this,the influence of the quality of the used voltage on the reliability of the operation of the substation was first introduced,and then the main reasons for the large fluctuation of the used voltage in the power system were analyzed.According to China′s power quality power supply voltage deviation standards,the allowable range of the fluctuation of the voltage of the used wire was obtained.Finally,considering the high voltage used in the three 35 kV substations in Yuyao,the optimal range of the gears used was calculated through theoretical analysis and calculations,and reasonable recommendations were made based on the calculation results.