Distributed photovoltaic energy storage system and energy management method

A distributed photovoltaic and energy storage system technology, applied in the field of distributed photovoltaic energy storage system and energy management, can solve the problems of high cost, single function and low efficiency of photovoltaic power generation energy management system, so as to prolong life and improve system energy The effect of improving management efficiency and processing efficiency
CN103390900AInactive Publication Date: 2013-11-13SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI UNIVERSITY OF ELECTRIC POWER
Publication Date
2013-11-13
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a distributed photovoltaic energy storage system and an energy management method. The system comprises a photovoltaic cell array and an energy storage cell component; a converter device comprises a photovoltaic cell direct current conversion module, an energy storage cell direct current conversion module, a rectification conversion module, a grid-connected inverter module and an off-grid inverter module; the energy management system is connected with each module; a layered control strategy is applied to optimize operation of the distributed photovoltaic energy storage system; a central decision-making level makes an operating strategy of the whole system according to current energy conditions and feeding characteristics of each power supply; a centralized control level monitors states of distributed power supplies in real time and takes corresponding control measures under different energy conditions; and a local executing level selectively cuts a part of loads or stores surplus electricity into an energy storage cell according to the load requirement of an actual system and the energy conditions. Photovoltaic power generation and energy storage technologies are sufficiently combined, so that the photovoltaic and the energy storage are intelligently controlled, and the energy management efficiency, the power supply reliability, power quality and the like of the system are effectively improved.
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Description

technical field

[0001] The invention relates to a solar photovoltaic power generation system, in particular to a distributed photovoltaic energy storage system and an energy management method. Background technique

[0002] Solar energy is rich in resources and widely distributed, and it is the renewable energy with the greatest development potential in the 21st century. Since the 1990s, solar photovoltaic power generation has developed rapidly and has been widely used in aerospace, communications, transportation, and the lives of residents in remote areas.

[0003] Solar photovoltaic power generation system is a form of distributed power generation. It is mainly composed of distributed power supply medium, energy conversion device, load and energy management system. Through the coordinated control of the energy management system, the self-control, protection and management of the system can be realized. It can be operated in parallel with the external power grid or independ...

Claims

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