SYSTEM STABILITY AND ITS INFLUENCING FACTORS ANALYSIS OF THE ISOLATED WIND-SOLAR-DIESEL-BATTERY HYBRID MICRO-GRID

摘要

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.