Application and Effect Analysis of Series Reactive Power Compensation in Low Voltage Distribution Network

Yongjun Yu, Junmei Weng, Weifeng Xu, Chongkai Cai, Ziang Duanmu, Ji-Song Hong, H Zhao
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Abstract

The load terminal voltage at the low voltage side of the distribution network will drop when the user load increases. Thereby affecting the normal operation of the electrical appliance. Currently, the treatment approach to the voltage deviation at the low voltage side of the distribution network is using the Parallel reactive power compensation technology. However, the compensation effect will decrease with the load increases. To solve the above problems, this paper proposes a method for applying series capacitor compensation to the low voltage side of the distribution network. Firstly, the principle of low voltage generation on the low-voltage side of the distribution network is derived. Then introduce the principle of series reactive power compensation method. And according to the actual parameters of the project, simulate the terminal voltage amplitudes and the line current under the different wire types and load rates. Finally, the improvement effect of series reactive power compensation on the low-voltage side power quality of distribution network is analyzed with simulation calculation. The results show that the proposed method has a good control effect on the power quality of the low-voltage side of the distribution network.
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串联无功补偿在低压配电网中的应用及效果分析
当用户负荷增加时,配电网低压侧的负荷终端电压会下降。从而影响电器的正常运行。目前,配电网低压侧电压偏差的处理方法是采用并联无功补偿技术。但补偿效果会随着负荷的增大而减小。针对上述问题,本文提出了在配电网低压侧采用串联电容补偿的方法。首先,推导了配电网低压侧低压发电的原理;然后介绍了串联无功补偿法的原理。并根据工程的实际参数,模拟了不同导线类型和负载速率下的端子电压幅值和线路电流。最后,通过仿真计算分析了串联无功补偿对配电网低压侧电能质量的改善效果。结果表明,该方法对配电网低压侧电能质量有较好的控制效果。
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