Control method for improving power grid stability by applying energy storage device

Abstract

The invention relates to the technical field of intelligent power grids, and discloses a control method for improving the power grid stability by applying an energy storage device. A double-layer control method is adopted, a stability control layer adopts short-time scale control, the control factor is system stability, wind power and photovoltaic output connected into the system and load and voltage fluctuation values of power consumers are tracked, energy storage active power and energy storage reactive power are obtained through load flow calculation and a particle swarm algorithm and fed back to an energy storage device grid-connected inverter interface to serve as reference values, and when load abrupt change occurs, the energy storage system can give a response prior to other power generation devices of the system according to the reference values. The optimization control layer adopts long-time scale control; the stability and economy of the system and the real-time state and the service life of the energy storage system are comprehensively considered, the charging and discharging power and the residual capacity of energy storage are obtained through the particle swarm algorithm, the result obtained by the stability control layer is optimized and uploaded to the energy storage detection control module, and finally the operation mode and the charging and discharging powerare determined.

Description

technical field [0001] The invention relates to a method for increasing the consumption of new energy to improve the stability of the power grid, in particular to a control method for improving the stability of the power grid by using an energy storage device. Background technique [0002] At present, new energy is developing rapidly. There are a large number of wind power and photovoltaics connected to the power grid. Some areas even rely on new energy to supply power to power users. The generated electric energy system cannot be completely absorbed, resulting in energy waste. Establishing an energy storage system on the grid side is an effective solution. The response speed of the energy storage system is very fast, and it can output power in time according to the change of load and the output of other power sources in the system, and can bear the impact of sudden load on the stability of the system. Reducing the output of thermal power generation plays an important role....

AI Technical Summary

Problems solved by technology

However, this method only pays attention to the generator set, and does not connect various power generation systems in the power distribution system with each other. From the perspective of the distribution network as a whole, the energy storage system is used to reduce the power deviation between each power generation system and the load, so as to achieve operation The role of economic purpose

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