Active-reactive power coordinated control method for energy storage power station

Abstract

The invention discloses an active-reactive power cooperative control method of an energy storage power station. By collecting the state information parameters of the power grid and combining the active power and reactive power control capabilities of the state of the energy storage power station, starting from the division principle of the nine-zone diagram, the state of the power grid is carried out. Periodic monitoring and identification, combined with the self-status judgment of the energy storage power station, switches the strategy of the active-reactive power output control of the energy storage power station, and uses the battery energy storage system to charge and discharge through the grid-connected energy storage inverter to independently output or absorb power. The grid energy realizes the active-reactive power output adjustment function of energy storage connected to the substation, which improves the power quality and the stability of the power grid; the present invention utilizes the active-reactive power output capability of the energy storage system to perform adjustment control, It can flexibly realize the change of the adjustment limit of active power and reactive power, give full play to the capacity advantage of the transformer in the substation, ensure the demand for active and reactive power adjustment of the power grid, and improve the utilization rate of equipment.

Description

technical field [0001] The invention belongs to the technical field of intelligent power distribution, and in particular relates to an active-reactive power coordinated control method of an energy storage power station. Background technique [0002] With the development of society, electric energy has become an indispensable secondary energy source in people's production and life, bringing endless convenience to people's production and life. With the development of technology, the status of the use of electric energy has been gradually improved, and the realization of electric energy substitution is the energy development goal of modern society. In the terminal energy consumption link, use electric energy to replace scattered coal and fuel consumption, such as electric heating, ground energy heat pumps, industrial electric boilers (kilns), electric vehicles, and electric energy storage peak shaving. [0003] The premise of using electric energy is the reliability and safety...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the technical problems of poor security and stability of the power grid and low level of intelligence of the power grid, the purpose of the present invention is to provide an active power-reactive power cooperative control method for energy storage power stations, according to the load power P and connection power of the battery energy storage system connected to the substation Input the bus voltage U to dynamically adjust the output of active power and reactive power, combined with the drawing of the nine-area map and the state of the battery energy storage system, to fully utilize the utilization rate of the battery energy storage system (active-reactive power equipment) and make use of The battery energy storage system has better charge / discharge capacity, improves the power supply quality of the grid, and maintains the safe and stable operation of the grid

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