Research on Reactive Power Coordinated Control Strategy of Doubly-Fed Wind Farm Considering STATCOM

The stability problem caused by the integration of wind farms into the power grid is becoming more and more serious. Reactive power shortage is an important reason for this problem. However, simply using reactive power compensation equipment will greatly increase the investment cost of wind farms. In view of the above problems, this paper puts forward the principle that the wind farm's own reactive power source is the first choice and the external reactive power source is the supplement, and the corresponding coordination is proposed for the two reactive power sources of the double-fed wind turbine grid-side converter and the reactive power compensation device STATCOM Control strategy, and a 3machine 9-node system including doubly-fed wind farm and STATCOM was built in the software DIgSILENT/Power Factory, and two typical fault types were set up. The simulation results show that, compared with the traditional wind farm constant power factor control In contrast, the proposed coordinated control model can ensure sufficient reactive power support in certain emergencies, which plays a very good role in supporting the transient voltage stability of the wind power access system and reduces the installed capacity of STATCOM, Which saves the investment cost of wind farms, and also verifies the correctness and effectiveness of the reactive power coordinated control model.