Method for setting gird-connected parameters of pumped storage unit in pump working condition

The invention discloses a method for setting gird-connected parameters of a pumped storage unit in a pump working condition. The method comprises the steps as follows: in the pump working condition, when the pumped storage unit is started in a static frequency converter starting mode or a back-to-back starting mode, closing pulse leading time is set; permissible closing voltage and permissible frequency of the pumped storage unit and phase angle difference compensation between unit voltage and power grid voltage within the closing pulse leading time are set; the exact moment for sending out a closing command is calculated by a synchronous connection device when the unit is in the pump operation condition; and grid connection is finished. The method disclosed by the invention has the beneficial effects that the grid-connected transient process duration can be shortened by the obtained parameters; the impact to the power grid is reduced; and the possibility of a grid connection failure is reduced.