双馈风电机组的功率控制技术研究

Research of Power Control Technology for Doubly-fed Wind Power Unit

我国风力发电发展迅速,风电场的装机容量不断增大。由于风力发电机组输出功率具有波动性、间歇性等特点,大规模风电接入对电力系统的安全运行造成严重影响,制约了我国风电事业的持续发展。因此,对风力发电机组的有功功率和无功功率控制技术进行研究,使风力发电机组能够参与系统功率的调整具有重要意义。本文首先建立了变速恒频双馈风力发电机组的数学模型,并对双馈风力发电机组的有功和无功调控能力进行了分析。然后,本文提出了实现双馈风力发电机组的有功和无功控制的方法。最后,本文利用PSCAD/EMTDC仿真平台建立了双馈风力发电机组的仿真模型,并通过仿真验证了本文所提风电机组功率控制方法的可行性。

The wind power generation is rapid development in our country,The installed capacity of wind farms is continuously increasing. Due to the wind power generation unit output has volatility, intermittent etc., Large scale wind power access to power system security caused serious influence, restricted the sustainable development of wind power in China business. Therefore, the wind power generation unit of active power and reactive power control technology, make the wind power generation unit to participate in the adjustment of the power system has important significance. This paper firstly established the variable speed constant frequency doubly-fed wind power generation unit, and the mathematic model of doubly-fed wind power generation unit of the active and reactive power regulation ability were analyzed. Then, this paper put forward for the realization of doubly-fed wind power generation unit of the active and reactive power control method. Finally, this paper, by using PSCAD/EMTDC simulation platform established doubly-fed wind power generation units simulation model, and through the simulation results that the proposed wind generator power control method is feasible.