Adaptability Of North China Power Grid After A Large Number Of Wind Power Integration

Wind energy is gaining more and more attention.However, due to the uncontrollable of wind, wind power is difficult to predict, When the wind farm exports bus down to a certain extent, generator will show a different operating with the steady-state even off-grid operation. Therefore, the accurate analysis of the double-fed wind turbine operation on the impact of network security and reliability is essential.First, this paper introduces the structure and principle of double-fed generator and analyses the doubly-fed wind turbine model in PSASP, the key parameters of the wind turbine were proposed and the sensitivity analysis of these parameters was carried out. the physical meaning of these parameters was analyzed.Second, wind farm capacitor test and wind farm 35kV bus three-phase short circuit test were introduced. Relevant parameters were modified according to the data of wind farm 35kV bus three-phase short circuit test. The simulation curve is closer to the measured curve, so the accuracy of the DFIG model was improved.Finally, wind power network's security and stability control are analyzed under the North China Power Grid 2011 to 2012 planning data. The effects of power transmission passage-way of Mongolia and Power Grid of Zhangjiakou in security and stability was analyzed. The measures to maintain stable operation after failure was proposed. The methods to improve the level of system stability was studied. And the power grid of small signal stability problem was studied, and the main oscillation mode of the North China Power Grid And the effects of wind power was analyzed.