Distributed household energy storage system

Abstract

The invention relates to the technical field of solar power generation, in particular to a distributed household energy storage system, in which a solar power generation device comprises a solar paneland an MPPT tracker. The solar panel is connected with a bidirectional DC / AC converter through a bidirectional DC / DC converter through the MPPT tracker and a battery system respectively. The bidirectional DC / AC converter is connected with a grid-connected circuit. The grid-connected circuit is connected with a public grid. A load circuit is connected with a node between the bidirectional DC / AC converter and the grid-connected circuit. The load circuit is connected with a user load. The battery system includes battery modules and battery management systems (BMSs). The BMSs are connected with the respective battery modules one by one for collecting operational status information of the corresponding battery modules. The BMSs are connected with an energy storage inverter. The energy storageinverter includes the bidirectional DC / AC converter. The energy storage inverter controls the charging / discharging switching of the battery system. The design and adjustment of the invention are moreflexible, the protection is more comprehensive, and it is safer for the user to use electricity.

Description

technical field [0001] The invention relates to the technical field of solar power generation, in particular to a distributed household energy storage system. Background technique [0002] With the increasing awareness of environmental protection in the society, clean energy is widely recognized and accepted, and at the same time, national policies give strong support to the new energy industry. Photovoltaic panels or film curtain walls are installed to form a distributed household photovoltaic system, and energy storage batteries are added to the system to form a distributed household storage system. [0003] However, the existing system has a single plasticity, and cannot adapt to users' different photovoltaic installed capacity and different power consumption requirements, and cannot achieve the optimal choice of users in terms of function and economy. Moreover, most of the existing systems do not have the system protection function or the protection function is not perf...

AI Technical Summary

Problems solved by technology

[0003] However, the existing system has a single plasticity, and cannot adapt to users' different photovoltaic installed capacity and different power consumption requirements, and cannot achieve the optimal choice of users in terms of function and economy.

Moreover, most of the existing systems do not have the system protection function or the protection function is not perfect, which affects the normal and stable operation of the system and is not conducive to prolonging the service life of the system.

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