Method and device for controlling energy storage system, energy storage system and power system

Abstract

The invention relates to a method and a device for controlling an energy storage system, an energy storage system and a power system. The method includes the following steps: receiving a current powergrid dispatching instruction, and determining the minimum limit power according to the current power grid dispatching instruction and preset first control parameters; acquiring the current output value of a generator set and the historical control parameters in a first preset historical period, and obtaining a first predicted value of power according to the current output value and the historicalcontrol parameters; determining target control parameters according to the minimum limit power and the first predicted value of power; and acquiring a target output value of the energy storage systemaccording to the target control parameters, and making the energy storage system output electric energy according to the target output value. Thus, when the energy storage system and the generator set cannot respond to the power grid dispatching instruction, the target output value of the energy storage system can be flexibly adjusted so that the combined output value of the energy storage systemand the generator set can meet the dispatching demand of the power grid side.

Description

technical field [0001] The present disclosure relates to the field of electric power, and in particular, relates to a method and device for controlling an energy storage system, an energy storage system, and an electric power system. Background technique [0002] The automatic power generation control system is an important system to ensure the safe and stable operation of the power grid. With the increase of the grid-connected scale of unconventional power sources such as new energy sources, the automatic power generation control system is facing increasingly serious power frequency stability problems. In the regional power grid, most of the frequency regulation work is undertaken by thermal power units, resulting in frequent adjustment of the state of thermal power units, which is not conducive to the safe and efficient operation of thermal power units. Therefore, using the energy storage system and the generator set to respond to the grid dispatching command is a method t...

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Problems solved by technology

[0003] In the prior art, the output value of the power system can be obtained according to the grid dispatching instructions and preset control parameters, and the difference between the output value and the actual output value of the generating set can be calculated to obtain the target output value of the energy storage system. The system can output power according to the target output value, but since the preset control parameter is a constant value, when the energy storage system and the generator set cannot respond to the grid dispatching command, the combined output value of the energy storage system and the generator set will be Unable to meet the dispatching needs of the grid side

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