Chen Rouyi

Research on simulations and model of the isolated Wind-Solar-Diesel-Battery hybrid micro-grid

The disturbance defending ability of the isolated micro-grid is weak, and the randomness and the weak controllability of new energy generation are harmful to system stability. So a completed and accurate model of the isolated micro-grid is needed to do research on key technologies. This paper proposes an operating mode for the isolated micro-grid. A PSCAD simulation model of the isolated micro-grid with wind-solar-diesel-battery hybrid power generation is built based on the operating mode. The model parameters are obtained by parameter identification method. The feasibility and the effectiveness of the proposed approach are proved by simulation and model of an island planning micro-grid.

System stability and its influencing factors analysis of the isolated wind-solar-diesel- battery hybrid micro-grid

An isolated micro-grid system of wind-solar-diesel-battery hybrid power generation is suitable for remote areas and islands. Possessing qualities generally attributed to the isolated micro-grid are inadequate anti-disturbance ability and weak stability. Power system stability analysis is needed for providing some suggestions and advices to planning and design. This paper analyses system stability of an island isolated micro-grid at different operation modes. Based on the results, reasonable operation modes and system reserve demand are proposed for long-term, efficient, and stable operation of the isolated micro-grid. Sensitivity analysis has made to find critical factors which mostly affecting system ability, such as transformer selection, low voltage ride-through capability and so on.