Regional Power Network Voltage And Reactive Power Optimization After Large Scale Wind Power Integration

In recent years, distributed generation, especially wind power has been developing rapidly in our country, played an important role in energy-saving emission reduction and easing the electric tension, but also it has brought many negative effects to the quality of the voltage and the voltage regulation of power. Because wind power is strongly random and intermittent, traditional reactive power optimization method has been unable to fully meet the conditions of the large-scale wind power intergration.Large-scale wind power integration will greatly influence the reactive power and voltage distribution of the electric power system, this research takes Dongying power network as the research object, study on the impact of large-scale wind power integration and countermeasures, in order to achieve the goal of reducing power loss and improving voltage level of the power grid, improving the work efficiency of regulation persons.Firstly, elaborated the theory and optimization method for reactive power/voltagecontrol, and then carried out a single operating point of reactive power/voltageoptimization, considering the uncertainty of wind speed of reactive power/voltage optimization and based on load forecasting and wind power forecasting rolling reactive power/voltage optimization, and then the calculation results are analyzed.Through the analysis we draw the following conclusions:voltage limit depends on the power grid load level; power grid loss rate is largely affected by the wind speedvariation, proportional to the change of wind speed; when the load level is high,the equipment control margin becomes smaller, with the decline of load level,equipment control margin become larger; the wind power and load forecasting accuracy have a great affect on zhe rolling forecast results, the need to improve the prediction accuracy.