农网无功补偿装置SVG的研究

随着家用电器的普及、大量消耗电网的无功,进行农网无功补偿显得越来越重要。作为改善电能质量的一种重要手段,静止无功发生器(SVG)能够很好地补偿电网中无功分量。为此,提出一种新的无功电流的跟踪算法应用在直接电流控制的SVG中。该方法通过在一个计算周期内比较基波周期前后一段数据来快速跟踪无功电流。仿真表明该方法正确可行:仿真波形可以看出,在1个周期内可以实现对无功电流的准确提取,而且对电流变化跟踪效果好,防干扰能力强;算法简单快速,只需2个乘法器,易于实现。

Research of Reactive Power Compensation Device SVG on Rural Grid

With the popularity of household appliances,a lot of reactive power is consumed,so reactive power compensation for the rural grids has become increasingly important.To improve power quality,the static var generator(SVG) can be very good in the reactive power compensation.Against this,a new reactive current tracking algorithm is proposed in the application of direct current control in the SVG.The detection algorithm is tracking active current by comparing the sampling data with some before and after the cycle of fundamental supply voltage in the queue and all of these are done in a calculation cycle.The simulation studies show that the method is correct and feasible.The analysis of simulation waveforms shows that the compensation current can be achieved in a cycle.And,the effect of tracking changes on the current and the anti-jamming capability is obvious.The algorithm is simple and fast,and it needs only 2 multiplication machines in all,so it is easy to realize.