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With proportion of air conditioners increasing gradually, they can provide certain amount of frequency controlled reserve for micro-grid. To maximize using air conditioners and consider customer comfort, the frequency adjustment model is shown that the quadratic function model of trigger temperature of air conditioner compressor and frequency variation is provided which can be used to regulate respectively trigger temperature of air conditioner under micro-grid frequency rising and falling. This frequency adjustment model combines energy storage system’s primary frequency modulation method and secondary frequency modulation method, which is to optimize the micro-grid frequency. Simulation results verify the frequency modulation strategy can effectively improve air conditioners frequency modulation ability and micro-grid frequency modulation effect.

Frequency Control Method of Isolated Micro-grid Based on Thermostatically Controlled Load