TSC无功补偿控制策略研究及仿真分析

Research and simulation of TSC reactive power compensation control strategy

针对工厂中负载功率因数较低、电网向负载传输的无功功率较大,而导致电网电能损耗增大,电网电压不稳定的问题,对TSC动态无功补偿的原理和传统控制策略的弊端进行了研究,对基本控制策略、九域图控制策略、模糊控制策略进行了归纳,提出了一种基于模糊控制的改进型九域图无功补偿模糊控制策略,利用Matlab构建仿真模型,对用电负荷大小和功率因数发生突变时改进型控制策略的实时监测和控制性能进行了仿真。研究结果表明,以晶闸管投切电容器作为无功补偿方式的改进型无功补偿控制策略能实时快速地监测电网状态变化,并精准完成电容器投切动作,电网参数在一个电压周期内调整完毕并趋于稳定,功率因数波动幅度小,无过补偿,无投切振荡,系统反应迅速灵敏。

Aiming at the problem of increase of the power loss and instability of grid voltage resulting from low load power factor of factory and the increase of reactive power which flow from grid to load,the principle of TSC dynamic reactive power compensation and the disadvantages of the traditional control strategy were studied. In addition,basic control strategy,＂Jiu Yu diagram method＂control strategy and fuzzy control strategy were summarized. A new control method based on the combination of fuzzy control strategy and improved ＂Jiu Yu diagram method＂control strategy was put forward and simulated in Matlab. The results indicate that the improved control strategy based on the TSC which used in the whole working process of reactive power compensation can accurately and rapidly cast or cut capacitor and avoid oscillation and super compensation.