Rural region distributed type photovoltaic vanadium liquid battery energy storage micro power grid system and control method

Abstract

The invention proposes a rural region distributed type photovoltaic vanadium liquid battery energy storage micro power grid system, comprising a vanadium liquid battery energy storage unit, a variable flow controller, a photovoltaic power generation unit, an inversion controller, an alternating current supply unit, a main controller and a user's load unit. The photovoltaic power generation unit can output the direct current through two channels with one channel for directly outputting the direct current to the direct current input end of the main controller so as to be combined with the vanadium liquid battery energy storage to form a photovoltaic energy storage loop and the other channel for connecting the direct current power with the inversion controller where after the rectification and inversion by the inverter, the power frequency alternating current is outputted. The power frequency alternating current is transmitted to the alternating current input end of the main controller through a power generation meter so as to be combined with the user's load unit to form a photovoltaic energy supply loop.

Description

technical field [0001] The invention relates to a photovoltaic microgrid system, in particular to a rural distributed photovoltaic vanadium liquid battery energy storage microgrid system and a control method. Background technique [0002] Distributed photovoltaic power generation specifically refers to a distributed power generation system that uses photovoltaic modules to directly convert solar energy into electrical energy. It is a new type of power generation and comprehensive utilization of energy with broad development prospects. It advocates the principles of nearby power generation, nearby grid connection, nearby conversion, and nearby use. It can not only effectively increase the power generation of photovoltaic power plants of the same scale, but also It effectively solves the problem of power loss in boosting and long-distance transportation. [0003] Distributed photovoltaic power generation in China has entered the promotion stage. At present, preferential polic...

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