Bidirectional interactive type direct current ultra-micro grid system suitable for sustainable building

Abstract

The invention provides a bidirectional interactive type direct current ultra-micro grid system with a combined heat and power generation system suitable for a sustainable building according to the characteristics and requirements of Chinese buildings. A ultra-micro grid adopts a direct current bus to combine new energy source power generation, supercapacitor energy storage systems, combined heat and power generation, loads and control systems to form an intelligent micro grid with the advantages of little pollution, high utilization rate of energy source and flexible mounting place, and the intelligent micro grid can work in the island and grid-connecting working modes; the ultra-micro grid can be accessed into an alternating current power grid through a bidirectional AC-DC (alternating current to direct current) converter, so as to realize the bidirectional flowing of the power; an energy storage system adopts a supercapacitor and an electric automobile battery hybrid energy storage structure, and a house heat energy system is combined with an electric energy system by a combined heat and power generation system, a hot water tank and an electric heater, so as to realize the comprehensive management of energy is realized. The bidirectional interactive type direct current ultra-micro grid system has the advantages that by utilizing reasonable design and coordinated control, the quality of electric energy of the sustainable building can be improved; by combining the heat and power systems, the utilization efficiency of the energy source is improved; the distributed type new energy can be effectively utilized, and the functions of energy saving and emission reduction are realized.

Description

technical field [0001] The invention relates to a power supply system in which a direct current extremely micro-grid system of a power system is combined with a cogeneration system of heat and power. In particular, it refers to a DC micro-grid power supply system with high energy utilization rate that can realize two-way power flow with the AC large power grid and is used for sustainable buildings. It combines the house power system and thermal energy system. Background technique [0002] With the rapid development of economy, energy crisis and environmental pollution have become serious problems facing the world today. Sustainable buildings can achieve "zero energy consumption" in buildings, use new energy to generate electricity, reduce the consumption of limited fossil fuels, reduce air pollution, achieve energy conservation and emission reduction, and sustainable urban development. It is a residential type that will be vigorously developed in future cities. [0003] At ...

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Problems solved by technology

[0006] In order to realize high-efficiency utilization of distributed energy, solve the problem of "zero energy consumption" in sustainable buildings, and provide users with convenient and economical power energy, the present invention proposes a DC extremely micro-grid system that conforms to the characteristics of modern buildings

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