Voltage and Frequency Control of Microgrids Considering State Constraints and Attacks

Attacks, disturbances, and uncertainties often exist in microgrids and often endanger the safe operation of the system. To solve these problems, a voltage controller with attacks compensation is designed to reduce or offset the impact of attacks on system stability. Design an attacks observer to observe attacks in microgrids. Based on Multi-agent consensus and considering the full state constraints, tangent barrier Lyapunov function is used to constrain the states of the system, so that the system states are constraint within the preset ranges, and the reactive power sharing is realized. The variations of parameters in the system are estimated using a fuzzy system to improve the adaptive ability of the controller. The frequency controller is also designed similar to that of voltage controller to constrain frequency within the preset range. The effectiveness of the controller is verified through simulation.