低压配电网串联无功补偿的应用分析

配电网低压侧在用户负荷增加时会出现负荷端电压降低的情况,从而影响电器的正常运行。目前对配网低压侧电压偏移现象的治理途径主要是利用并联无功补偿技术,但其治理效果会随负荷量的增加而减弱。为解决上述问题,本文提出了一种将串联电容补偿应用到配电网低压侧的方法。首先分别推导了串并联无功补偿在线路中对负荷端电压抬升的原理,根据工程实际设置参数,仿真得到不同导线型号与负载率下的末端电压幅值,并对比了抬升同等电压两者各自所需的补偿容量大小,最后分析了串联无功补偿对配电网低压侧功率因数的影响作用,结果表明本文方法对低压配电网中的电压偏低具有更好的治理效果。

Application Analysis on Series Reactive Power Compensation in Low-voltage Distribution Network

In the low voltage side of distribution network,the reduction of end voltages at the load sides will occur in the case of load voltage increase of the customer,which will affect normal operations of electrical appliances.At present,the main approach to control voltage deviation at low voltage side of distribution network is to use parallel reactive power compensation technology,but its control effect will be weakened with the increase of loads.For solving above problem,a kind of method to apply the series capacitive com?pensation to low voltage side of distribution network is proposed in this paper.Firstly,the principle of se?ries and parallel reactive power compensation for voltage rise at load terminal is deduced respectively.The amplitude of end voltage of different types of lead types and load rates is obtained by simulation in accor?dance with the actual design parameters of project,the compensation capacity needed by them in rising the same voltage is compared.Finally,the effect of series reactive power compensation on power factor at low voltage side of distribution network is analyzed.It is shown by the result that the proposed method has better control effect for the low voltage in the low voltage distribution network.