Excitation control system of large-capacity energy storage generator with a dynamic DC load

Large-capacity energy storage generator with short-term rapid conversion of mechanical energy into electrical energy characteristic, is often used as a pulse power supply for short-term and high-power load occasions. The rotate speed will rapidly decline, when large-capacity energy storage generator releases large energy to a DC load, and the power of the load will approximately linearly increase in a short time. In order to maintain voltage stability of the DC side, the excitation control system needs to have the characteristic of fast and strong excitation. For the sake of improving the response speed of the excitation control system, the principle of feed-forward control is introduced based on voltage and current double closed-loop control. This paper shows derivation method of feed-forward control equation by space-time phasor diagram of synchronous generator, and feed-forward control parameters solution method is given. The experimental results verify the effectiveness of the excitation control strategy.