Island microgrid emergency support method based on frequency voltage interval division

The invention provides an island microgrid emergency support method based on frequency voltage interval division. The method comprises the following steps: S1, performing first condition judgment on a diesel generator; s2, when the diesel generator is in a first condition state, collecting voltage and frequency of the diesel generator, performing threshold interval judgment, and executing different strategies according to different interval judgment results; s3, on the basis of the strategy execution result, it is judged that the diesel generator forms new supply and demand balance, and if not, the steps S1-S3 are repeated. Under the condition that heavy loads and light loads of the diesel generator in the island micro-grid are considered, firstly, energy storage is used for rapid adjustment and supporting, the stability of the frequency and the voltage can be recovered more rapidly, and when the frequency and the voltage are further deteriorated and aggravated, energy storage is used for rapid adjustment and