Distributed Malfunction Estimation of Multi-Area Interconnected Power Systems Based on Intermediate Observer and Multi-Agent Systems

This paper designs a multi-agent-based intermediate observer for malfunction and state estimation of a multi- area interconnected power system. By building a simplified linear model of the power systems, a distributed malfunction observer based on intermediate variables is designed to achieve the estimation of actuator and sensor malfunction signals while considering the system's own and neighboring output estimation errors. The method overcomes the dependence of the conventional observer on the matching condition of the observer and calculates the gain of the observer by solving the linear matrix inequality. Eventually, through an example of simulation, the effectiveness of the design is verified.