向孤立无源负荷供电的VSC-HVDC系统控制策略

Control Strategy of VSC-HVDC System Supplying Power for Isolated Passive Load

本文介绍了柔性直流输电系统的系统结构及工作原理,采用柔性直流输电系统的双闭环解耦控制策略,在MATLAB中创建了风电场基于VSC轻型直流输电系统向一个孤立的无源负荷供电的仿真模型。仿真结果表明,系统直流电压值稳定在给定值20KV。系统输入,输出电压实现了协调配合,输入输出有功功率实现了协调控制和自动平衡传偷,各状态量都符合理论值。在此基础上,研究逆变器交流侧线路的谐波,并给出相应的滤波器结构和对应的选择方式,仿真结果表明,所应用的滤波器很好的抑制了逆变器交流侧线路的谐波。

This article describes system structure and working principle of the HVDC flexible system. Creating simulation model of VSC HVDC system that wind farm to supply power to an isolated passive load in MATLAB. The simulation results show that system stable DC voltage value at a given value 20KV, system input and output voltage to achieve the coordination, Input and output active power to achieve a coordinated control and automatic balance transfer stolen. The simulation results also show that the amount of each state are in line with the theoretical value. Researching harmonics of the inverter AC side line and giving corresponding filter structure and selection mode. The simulation results show that filter applied well suppressed Harmonics of the inverter AC side line.