Multi-type battery energy storage power station energy management method taking charge-discharge rate into account

Abstract

An energy management method for various types of battery energy storage power stations taking into account a charge-discharge rate, comprising: reading related data of a battery energy storage power station in real time; calculating a characteristic value of the charge or discharge rate of each battery energy storage unit; calculating an initial power command value of each battery energy storage unit; judging in real time whether the initial power command value of each battery energy storage unit goes beyond the permitted maximum charge or discharge power of the unit or not; if yes, conducting online correction and recalculation on the initial power command value of each battery energy storage unit; otherwise, setting the initial command value of the energy storage unit as a power command value thereof; and summarizing the power command value of each battery energy storage unit and outputting same. The method has an object of reasonably controlling the charge-discharge rate of each energy storage unit, and performs power coordination control and energy management inside the energy storage power station, and also takes into account the service life of an energy storage battery in a control policy, so as to fulfill the functions of avoiding the abusing of the energy storage battery, decelerating the battery ageing, etc. as far as possible.

Description

technical field [0001] The invention belongs to the technical field of smart grid and energy storage and conversion, and specifically relates to a real-time power control method and an energy management system for a large-power and large-capacity megawatt-level battery energy storage power station considering the characteristics of battery charge and discharge rates, and is especially suitable for large Battery power and battery energy management methods for megawatt-scale multi-type battery energy storage power stations in large-scale wind-solar-storage combined power generation systems. Background technique [0002] The National Wind-Storage Storage and Transmission Demonstration Project is the first batch of pilot projects of the State Grid Corporation of China to build a strong and smart grid. It is the world's largest comprehensive renewable energy demonstration project integrating wind power, photovoltaic power generation, energy storage and power transmission projects...

AI Technical Summary

Problems solved by technology

In the existing large-scale battery energy storage system / power station power control and energy management methods, the charge and discharge rate characteristics of the energy storage battery are generally not included in the constraints for energy management. Complementary characteristics of the energy system, and disadvantages such as affecting the service life of the battery

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