VIRTUAL SYNCHRONOUS GENERATOR WITH ACTIVE DAMPING

The invention relates to a method for controlling a power generating unit such as a wind turbine which is configured as a virtual synchronous machine. Capacitor voltage signals obtained from voltage measurements of output capacitors are filtered in order to reduce a magnitude of an impedance peak and/or shift the impedance peak where the impedance peak is present in an impedance characteristic of the output of the power generating unit. Filter compensated voltage signals obtained from the output capacitors are combined with a voltage magnitude reference to obtain the filtered capacitor voltage signals used for controlling the line side converter and thereby affect the impedance peak in a desired way. 本发明涉及用于控制被配置为虚拟同步机的诸如风力涡轮机的电力生成单元的方法。从输出电容器的电压测量结果获得的电容器电压信号被滤波以减小阻抗峰的幅值和/或移动阻抗峰，其中阻抗峰存在于电力生成单元的输出的阻抗特征中。从输出电容器获得的经滤波器补偿的电压信号与电压幅值参考组合以获得经滤波的电容器电压信号，该经滤波的电容器电压信号用于控制线路侧转换器，从而以期望的方式影响阻抗峰。