基于STATCOM的配电网三相不平衡治理

Three-phase Unbalance Regulation of Distribution Network Based on STATCOM

为了降低农村配电台区的三相不平衡度,提高供电质量,研制了基于IGBT的STATCOM三相不平衡调节装置。该装置采用d-q法检测无功电流,减少了计算时间,提高了计算效率;控制模式为双闭环控制,外环为电压控制,内环为电流控制,引入反馈控制环对补偿电流进行反馈控制,有效地提高了控制系统的精度。并采用MATLAB软件建立仿真系统,对STATCOM进行了仿真测试,测试结果表明STATCOM对三相不平衡具有调节作用。挂网测试结果也表明STATCOM装置对配电网三相不平衡有很好的抑制作用。

In order to reduce the three - phase unbalance factor of rural distribution area and improve the quality of power supply, a STATCOM three - phase unbalanced regulator based on IGBT is developed. The device uses the d - q method to detect the reactive current, which reduces the calculation time and improves the calculation efficiency. The control mode adopts double closed - loop control, that is, the outer loop is voltage control and the inner loop is cmTent control, and the feedback control loop is introduced to feedback the control of compensation current, which improves the accuracy of the control system effectively. The simulation system is established with MATLAB software, and the simulation test of STATCOM shows that STATCOM has a regulating effect on three - phase unbalance. The application results also show that the STATCOM device has a good suppressing effect on three - phase unbalance of distribution network.