A battery charging and discharging method dispatched by AGC

Abstract

The invention relates to a battery charging and discharging method scheduled by AGC. Out of practical considerations for the northern region, due to the lack of hydropower resources, it is greatly affected by temperature in winter and can only be used as a fine-tuning function, so the role of hydropower during heating in winter is not considered. To establish thermal power, battery energy storage devices participate in the AGC dispatching system. The system state is mainly divided into four control states: conventional power control state, battery discharge state, battery charge state, and clean energy control state. The AGC regulation system consists of four parts. The judgment of the work area is based on the premise that all new energy sources are connected to the grid, using the limit control strategy, the lower limit of the output of thermal power units and the capacity limit of battery units as the critical conditions, with thermal power as the main and batteries as the auxiliary, to ensure the stability of the system while consuming clean energy.

Description

technical field [0001] The invention belongs to the field of electric power dispatching, and relates to a battery charging and discharging method for AGC dispatching Background technique [0002] In the traditional mode, dispatching controls the power supply to adapt to load changes, realizes peak regulation and frequency regulation, and ensures the balance between supply and demand of the power grid. In recent years, nuclear power, wind power, and photovoltaics have grown rapidly, but the load growth has been relatively slow, and the phenomenon of oversupply has become more serious. At the same time, wind power and photovoltaics have intermittent characteristics, which pose a major safety hazard to the operation of the power grid. The problem of clean energy acceptance has become more prominent . In the winter of 2015, wind curtailment even reached 50%. In order to make better use of clean energy, reduce thermal power generation, protect the ecological environment, and dev...

AI Technical Summary

Problems solved by technology

The current AGC is based on the AGC scheduling of thermal power, and the energy storage element is used as an auxiliary output scheduling measure and has not been included in the AGC scheduling control. As a means of absorbing new energy and controlling the frequency stability, the energy storage element has not been included in the AGC. During dispatching, the two cannot better increase the consumption of new energy and perform rapid real-time adjustment

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