Abstract: The penetration rate of renewable energy in the island AC microgrid was relatively high，and its

system inertia was relatively low. The primary frequency regulation during island operation mainly relies on

equipment such as diesel engines and energy storage. Using the fast adjustment characteristics of energy storage

and static var generator（SVG），a frequency coordinated control strategy for island microgrid based on voltage

adjustment was proposed. When the frequency of the island microgrid fluctuates，the load node voltage was

changed through the coordinated control of energy storage and SVG，and the static characteristics of the load

voltage was used to quickly adjust the system frequency. In this control strategy，both energy storage and SVG

adopt droop control，no remote communication was required，and only load node voltage and frequency signals

need to be detected. This control can reduce the configuration of the energy storage capacity of the microgrid and

improve system stability. Through DIgSILENT/PowerFactory simulation research，the control strategy was verified.

      Key words: microgrid；droop control；SVG control；primary frequency regulation