三相四桥臂STATCOM的研究

在三相四线制电力用户中,负荷经常不平衡,零线电流大.三相四桥臂STATCOM专门用第四对桥臂对零线电流进行补偿.论文首先介绍了STATCOM的整体结构,还对无功电流检测方法和STATCOM的控制策略进行了介绍.在理论分析的基础上,利用MATLAB软件建立了系统的仿真模型,对带感性负载时稳态和不平衡情况下进行了模拟仿真,仿真结果验证了算法的可行性.

Study of three-phase four-leg statcom

In the three-phase four-wire power system,the large neutral line current is resulted from the unbalanced load.Three-phase four-leg STATCOM exclusively uses the fourth bridge arm to compensate the neutral line current.The thesis firstly introduced the principle of STATCOM.The thesis also introduced the reactive current detection method and the control strategy of STATCOM.Based on the theoretical analysis,the simulation model of the system has been established using MATLAB software.under the steady state and imbalance state for the power system with inductive load,the system has been simulated.The simulation results demonstrated the feasibility of the algorithm.