Multi-energy comprehensive management type energy router containing electric hydrogen energy storage and control method

Abstract

The invention provides a multi-energy comprehensive management type energy router containing electric hydrogen energy storage and a control method, and relates to the technical field of new energy and micro-grid electric energy conversion. The router comprises a three-phase PWM rectification unit, a bidirectional DC-DC conversion unit, a single-phase DC-AC conversion unit, a photovoltaic Boost type multi-level DC / DC conversion unit, a VSC conversion unit, a storage battery energy storage interleaved parallel Boost / Buck multi-level DC / DC conversion unit, a fan multi-level inversion unit, a basic electrolytic cell self-current-sharing resonance type multi-level DC / DC conversion unit and a fuel cell Boost conversion unit. The system comprises a water circulating pump Buck conversion unit, a hydrogen energy storage system, a medium-voltage direct-current bus and a low-voltage direct-current bus, when the output power of the wind turbine generator and the output power of the photovoltaic power generation system are greater than the load power, excess electric energy is converted into hydrogen through electrolyzed water to be stored in the hydrogen energy storage system; when the output power is smaller than the load power, the proton exchange membrane fuel cell generates electric energy by using hydrogen, and the feed feeds back the electric energy to the load unit or the power distribution network.

Description

technical field [0001] The invention relates to the technical field of new energy and microgrid electric energy conversion, in particular to a multi-energy integrated management type energy router with electric hydrogen energy storage and a control method. Background technique [0002] The traditional energy router device takes the solid-state transformer as the core, the working mode is single, and the energy conversion efficiency is low. And due to the randomness and randomness of renewable energy power generation, energy router devices are usually connected to energy storage devices, while traditional energy storage devices mainly include lead-acid batteries and supercapacitors, and their disadvantages mainly include low energy density and capacity. Low, short life, expensive, difficult to maintain, etc. In addition, discarded lead-acid batteries will also pollute the environment, which is not in line with the green development concept advocated by the country today. [...

AI Technical Summary

Problems solved by technology

The traditional energy router device uses a solid-state transformer as the core, has a single working mode, and has low energy conversion efficiency

And due to the randomness and randomness of renewable energy power generation, energy router devices are usually connected to energy storage devices, while traditional energy storage devices mainly include lead-acid batteries and supercapacitors, and their disadvantages mainly include low energy density, capacity Low cost, short life, high price, difficult maintenance, etc. In addition, waste lead-acid batteries will also pollute the environment

The traditional energy router power distribution algorithm does not consider the SOC state of the battery well, and the probability of overcharging and overdischarging is very high, which seriously affects the service life of the energy storage device

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