Load Current Feedforward for Voltage Stabilization Control in Extended Range Generator Sets Based on Sliding Mode Observer

In the process of voltage stabilization control of extended range generator sets, traditional double closed loop control has problems such as large fluctuations in bus voltage and long regulation time when the load suddenly changes. In order to solve this problem, this paper proposes a strategy of using load current feedforward compensation to achieve voltage stabilization control. Based on the principle of power balance, it uses a sliding mode observer to observe voltage fluctuations, and estimates the magnitude of the load current. Then it converts the estimated load current value into torque compensation feedforward to the output end of the voltage loop; In terms of control algorithm, an improved super spiral sliding mode algorithm is adopted, which can not only improve the response time of the system, but also reduce the impact of the sliding mode observer on the output chattering of the system. The stability of the observer is proved through Lyapunov stability theory. Finally, simulation and experimental comparisons were conducted with traditional dual loop control, and the experimental results showed that this method can effectively improve the system's voltage stability performance and enhance the system's anti-interference ability.