Control method and device for DC/DC converter of energy storage device in distributed power generation system

Abstract

The invention discloses a control method and a control device for a DC / DC converter of an energy storage device in a distributed power generation system. The control method comprises the steps of: detecting and acquiring at least two kinds of parameters among parameters of the energy storage device, parameters of a power generation device in the distributed power generation system, and parametersof a load; and generating a control strategy by utilizing a genetic algorithm according to the parameters, and controlling the DC / DC converter. The control device comprises a single chip microcomputer, an RS232 communication interface circuit, a power circuit and a display circuit. The control method and the control device for the DC / DC converter provided by the invention can generate an optimal control strategy according to the actual power generation condition of the distributed power generation system, so that the charging and discharging control of the DC / DC converter cooperates with the power generation device in the distributed power generation system and the load in operation, and the optimal control of the distributed power generation system is achieved.

Description

technical field [0001] The invention relates to the field of distributed power generation, in particular to a control method and device for a DC / DC converter of an energy storage device in a distributed power generation system. Background technique [0002] Renewable energy has received more and more attention and is considered to be a powerful supplement to relieve the pressure on traditional energy sources. Among them, distributed power generation based on photovoltaic power generation, wind power, and geothermal power is a hot research topic today. [0003] The active power output by distributed power generation systems such as photovoltaic power generation and wind power generation is greatly affected by the environment, such as wind speed, wind direction, temperature, and light intensity. When one or more factors in the environmental factors change, the output power of the distributed generation system will fluctuate greatly. When the distributed generation system is ...

AI Technical Summary

Problems solved by technology

The control of this kind of DC / DC converter does not consider the optimal operation mode of the whole system while realizing the charging and discharging control of the battery. The problem of the depth of discharge, however, the charging / discharging times and the depth of discharge of the battery are important factors affecting the life of the battery; the traditional control strategy of the DC / DC converter does not take into account various aspects when controlling the charging and discharging of the battery. The power generation state of the distributed generation system, the operating state of the load, and the power state of the battery cause a reduction in the utilization rate of the distributed generation system.

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