An island energy system and its working method

Abstract

The invention relates to the field of energy storage and utilization and discloses an islet energy system and a working method thereof. The islet energy system comprises a bidirectional energy storageinverter, a photovoltaic subsystem, an optical thermal subsystem, an absorption refrigeration subsystem and an energy storage subsystem, wherein the photovoltaic subsystem is powered on at day time to generate power through solar energy; power is output from the photovoltaic subsystem; direct current is converted into alternative current to be supplied to users through the bidirectional energy storage inverter; extra current is stored in the energy storage subsystem; the optical thermal subsystem is used for generating and storing thermal energy from solar energy; the absorption refrigerationsubsystem is used for generating cold energy from electric energy and thermal energy; the energy storage subsystem is powered on at night; power is output from the energy storage subsystem and is rectified by the bidirectional energy storage inverter to be supplied to users; the absorption refrigeration subsystem is driven through electric energy and thermal energy, and cold energy is generated.By using an energy storage technique and a bidirectional energy storage inversion technique, power supply, heat supply and cold supply to an islet are achieved under the condition that no large powergrid support is available, external power supply is not needed, and comprehensive utilization of renewable energy is achieved.

Description

Technical field [0001] The invention relates to the field of energy storage and energy supply, in particular to an isolated island energy system and a working method thereof. Background technique [0002] Energy storage technology, especially the storage of electrical energy, is of great significance to the optimization and regulation of energy systems. Renewable energy power represented by wind and wind power has the advantages of abundant reserves, green and low carbon, and is currently popularized globally, but renewable energy power has inherent defects. Taking photovoltaic power generation as an example, due to the alternation of day and night, photovoltaic power generation has regular intermittent; due to the influence of rainy weather, photovoltaic power generation has uncertain long-period intermittent; due to the influence of sunshine conditions, photovoltaic power generation has regular output power fluctuations ; Due to the influence of sky clouds, photovoltaic power ...

AI Technical Summary

Problems solved by technology

[0003] The use of microgrids to realize regional off-grid consumption of renewable energy is a potential way to solve the utilization of renewable energy, but a single power supply is difficult to meet the needs of users for multiple energy sources, and the use of electricity to directly produce heat energy and cold energy are clearly inefficient and wasteful

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