Method and device for on-grid and off-grid dispatch, and energy storage air-conditioning system

A method for on-grid and off-grid dispatch, comprising:

• causing a load to be off-grid and causing an energy storage converter to supply power to the load after determining that grid is down;
• determining a given power and a given voltage according to a voltage and a current of the load obtained for the last time before the grid is down;
• and obtaining an actual voltage and an actual current outputted by the energy storage converter;
• and
• adjusting an output parameter of the energy storage converter according to the given power and the given voltage, as well as the actual voltage and the actual current outputted by the energy storage converter;
• wherein the step of determining that the grid is down comprises:
• judging whether a grid voltage meets a first preset condition and judging whether a grid current meets a second preset condition;
• and
• determining that the grid is down if at least one of the grid voltages meeting the first preset condition and the grid current meeting the second preset condition is true, otherwise determining that the grid is not down.