A household microgrid integrated grid-connected device

Abstract

The invention discloses an integrated grid connection device for household microgrids. The integrated grid connection device comprises a box, a power distribution network, a photovoltaic power generation system and an energy storage device. An alternating-current bus, a photovoltaic inversion module, an energy storage and current transformation module, a DSP (digital signal processor) chip and a touch screen connected with the DSP chip are arranged in the box, a grid interface, a user interface, an energy storage interface and a photovoltaic interface are arranged on the box, a direct-current end of the photovoltaic inversion module is connected with an output end of the photovoltaic power generation system through the photovoltaic interface, an alternating-current end of the photovoltaic inversion module is connected with the alternating-current bus in parallel, a direct-current end of the energy storage and current transformation module is connected with the energy storage device through the energy storage interface, an alternating-current end of the energy storage and current transformation module is connected with the alternating-current bus in parallel, an input end of the alternating-current bus is connected with the power distribution network through the grid interface, an output end of the alternating-current bus is connected with the user interface, and an output end of the DSP chip is connected with a control end of the photovoltaic inversion module and a control end of the energy storage and current transformation module. The integrated grid connection device can be used for intelligent management on power supply of household loads.

Description

technical field [0001] The invention belongs to the technical research field of power electronic micro-grid, and in particular relates to a household micro-grid integrated grid-connected device. Background technique [0002] As a beneficial supplement to a single large power grid, the microgrid has great potential for wide application. At present, some major developed countries and regions in the world, such as the United States, the European Union, and Japan, have carried out research on microgrids, and other countries such as Canada, China, and South Korea have also begun to get involved. [0003] The United States first proposed the concept of microgrid. In 1999, the Consortium for Electric Reliability Technology Solutions (CERTS) conducted research on the reliability, economy and environmental impact of microgrid for the first time. By 2002, a relatively complete micro-grid concept was proposed. The microgrid design concept of CERTS is not to use fast electrical contro...

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Problems solved by technology

However, this type of system has the uncontrollability of energy scheduling, which will bring uneasy factors to the management of distribution network.

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