风力发电并网变流器直接功率控制研究

针对风力发电并网变流器,研究了一种新的控制策略直接功率控制。该控制策略检测并网的电压与电流,计算出瞬时的有功与无功功率,与给定的有功与无功功率进行比较,根据并网电压矢量所在的扇区,按开关表给出开关管的控制信号。通过直接对系统的有功与无功进行控制,并网变流器能方便地实现以单位功率因数向电网馈送能量。对该控制策略进行了详细介绍,仿真了并网条件下的工作状况,验证了该控制策略的可行性。

Research of Grid Connected Three Phase VSI PWM Converter in Wind Energy System Using Direct Power Control

Direct power control method used in grid connected three phase VSI PWM converter was presen- ted.By sensing the voltage and current of grid connected and calculating the instantaneous active power and re- active power.It can educe the pulse signals of the switchers,according to the giving active power and reactive power and the place of the voltage vector.Through directly controlling the active power and reactive power, the PWM converter can easily transfer the wind power energy to the network at unity power factor.The result of the simulation has verified the feasibility of the control method.