Research On Wind Farm Active Power Distribution And Reactive Power Optimization

With the increasing installed capacity of wind farms, the wind farm grid has more and more influence to power grid. In the process of wind power grid, wind power distribution of active and reactive power compensation problem is large wind farm grid faced. This thesis studied the distribution of active power and reactive power compensation of wind farms, from the mathematical model, strategy and simulation analysis of the related problems.For wind power active power control strategy, this thesis proposes a active power control strategy based on the classification of predictive power. The method according to the operation of the wind and predictive power to classified generators. And according to the largest wind power generation capacity and operating constraints to establish active distribution model. Theory and simulation results show that using different allocation methods for each type of generators, which can effectively improve the accuracy of the active power output of wind farms. The method can reduce the lifting power of the frequency at the same time, with the active control strategy based on the proportional distribution of wind farm capacity compared to the control strategy is more effective and reasonable.For wind farm operation can cause a large number of reactive power in the active power loss problems. Analyzes the wind power system reactive power characteristics of the electrical equipment, and the change of reactive power in wind generators, wind speed for impacting wind farms load flow. Proposing the premise of wind generators set as a source of reactive power in wind farm that the wind power can be used more. Premising the quality of bus voltage in wind farm to reduce wind loss at the same time. The reactive power of wind generators as the control object, the wind farm reactive power optimization problem into more complex optimization problem. Using Dalian Tuoshan wind farm by simulating the actual operation data, example results show the effectiveness of the proposed method.