Isolated Local Generator Condition Monitoring Using State-Observer Method

This project was focused on the generator condition monitoring for an isolated power system using state observer method. An isolated power system is a system that is normally located in low voltage side and basically does not connect to the main grid or utility supply. The power capacity is much lower than the main grid capacity and commonly used as a backup system for the critical load. Without connecting to the main grid, the isolated power system generator may be disturbed by the sudden contingencies problem. These problems have basically occurred due to the sudden demand change during isolation. Without a proper monitoring approach, the generator might be unintentionally operating over the limitation. Hence, this project purposely introduces an approach to monitor the operating condition of a generator in isolated power system. The proposed approach is to apply a state observer model into the isolated power system model. The input for the state observer is the network’s dynamical frequency behaviour. Then, an estimated generator’s state such as governor state and turbine state was determined. The estimation process was verified through multifarious load demand changes, and the result shows the effectiveness of the state observer in application towards the generator’s state behaviour.