Energy management control method of photovoltaic energy storage system

Abstract

The invention discloses an energy management control method of a photovoltaic energy storage system. The energy management control method comprises a photovoltaic energy storage system configuration method, a concentrated energy storage system control method and a distributed energy storage system control method. Compared with a mixed energy storage structure, the energy management control method adopts a concentrated energy storage and distributed energy storage layered control manner, and global control and partial control can be conveniently and effectively carried out on the photovoltaic energy storage system; a control circuit and a control process are simplified and the control efficiency is improved; by optimizing the concentrated energy storage and distributed energy storage control methods, the photovoltaic utilization rate can be effectively improved and bus voltage is stabilized; and with the adoption of a storage battery grouped control manner, the problems that the data volume is great and an electric charge state of each storage battery is difficult to reasonably determine when single control is adopted are solved. The energy management control method can be widely applied to the distributed photovoltaic energy storage system; and a control manner is simplified, the control efficiency is improved and the photovoltaic utilization rate and the power supply quality are improved, so that the energy management control method has very important application prospects.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic energy storage combined systems, and more specifically relates to an energy management control method suitable for photovoltaic power generation systems. Background technique [0002] Photovoltaic power generation technology has developed rapidly in recent years due to the abundant reserves of solar energy resources, wide distribution, economical and environmental protection. The conversion efficiency of photovoltaic cells continues to improve, and the production cost continues to decrease, making photovoltaic power generation occupy an important position in the future development of energy, the environment and human society. However, due to the volatility, randomness and intermittent characteristics of photovoltaic power generation, its output is unstable and greatly affected by environmental factors. Especially in the case of high-penetration photovoltaic access, the problems brought about...

AI Technical Summary

Problems solved by technology

This method is limited to centralized control of energy storage, without considering the configuration of hybrid energy storage devices, and cannot flexibly arrange charging and discharging of different energy storage devices according to different control objectives. The control circuit is complex and the operability is not high. Low efficiency, difficult to effectively optimize system operation

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