基于GTO的STATCOM提高风电场暂态电压稳定性的研究

A Study on Improvement of Transient Voltage Stability of Wind Power Generation Farm through GTO-based STATCOM

针对永磁直驱风电机组和基于GTO的48脉波+100Mvar STATCOM的数学模型,采用MATLAB中的仿真工具Simulink建立永磁直驱风电机组的模型和静止同步补偿器的模型。得出了基于GTO的静止同步补偿装置对电场暂态电压稳定性的结论:可以从感性到容性平滑的调节无功功率,自动发出GTO通/断控制脉冲,快速投切电容器,实现对供电线路无功功率的跟踪调节。仿真结果表明:STATCOM能够快速平滑地向电网节点注入或吸收无功功率从而在一个周波时间维持节点电压稳定,改善电能质量。

In the case of permanent magnet direct drive wind turbine set and GTO-based 48-pulse wave ＋ 100 Mvar STATCOM mathematical model,a permanent magnet direct drive wind turbine set model and a static synchronous compensator model are established by using MATLAB simulation tool Simulink. It is concluded that the GTO-based static synchronous compensator can stabilize the transient voltage of the electric field. Thus,it is made possible to adjust reactive power smoothly in the perceptual-capacitive aspect,send GTO on / off control pulses automatically,switch on / off the capacitor quickly and realize tracking regulation of the reactive power of the power supply line. The simulation results show that STATCOM can quickly and smoothly inject or absorb reactive power to / from the grid node,thus maintaining node voltage stability in one cycle wave period to improve the quality of power energy.