引入风电和高压直流输电对电力系统潮流和小干扰稳定性的影响

Influence of Wind Power and HVDC Transmission on Power System Flow and Small Disturbance

风力发电机组和高压直流输电均会影响电力系统的稳定性。研究了高压直流输电(HVDC)线路和双馈感应风力机组(DFIG)对电力系统的潮流和小干扰稳定性的影响,搭建了WSCC-9总线系统,并建立了HVDC模型、双馈风力发电机组模型,然后通过仿真软件分析了HVDC替代原有输电线路、DFIG替代同步发电机情况下,系统电压幅值、电压角、有功功率、无功功率、小干扰稳定特征值分布等的变化情况。结果表明:HVDC线路和DFIG对系统的无功功率和小干扰稳定性影响明显。

Wind turbines and HVDC transmission can affect the stability of power system. This paper analyzes the influence of HVDC transmission and DFIG on the stability of power system. The WSCC-9 bus system was built, and the HVDC model and the doubly-fed wind turbine model were established. Then, the changes of system power, voltage and power angle were analyzed by simulation software when HVDC replaced the original transmission line and DFIG replaced the synchronous generator. The results show that HVDC line and DFIG have obvious influence on the reactive power and small disturbance stability of the system.