Wind-solar complementary hydrogen production power station system based on +/-600V direct current microgrid

Abstract

The invention discloses a wind-solar complementary hydrogen production power station system based on a + / -600V direct current microgrid. The system comprises a wind power generation module, a photovoltaic power generation module, an energy storage module and a water electrolysis hydrogen production module, the wind power generation module is connected with a + / -600V direct current bus through a wind power rectifier and serves as a new energy power generation end to supply power, the photovoltaic power generation module, the energy storage module and the water electrolysis hydrogen production module are connected with a + / -600V direct current bus through a direct current converter, and the + / -600V direct current bus is connected with an alternating current power grid through a grid-connected module to achieve grid-connected operation or isolated-grid operation of the direct current micro-grid hydrogen production system. The direct-current bus bar is adopted to greatly reduce the electric energy conversion link of the multi-energy complementary hydrogen production system, the reliability of the system and the comprehensive utilization efficiency of energy are improved, a direct-current micro-grid hydrogen production system topological structure suitable for multiple operation modes of grid connection and isolated grid is provided, the requirement for high-efficiency uninterrupted hydrogen production under various working conditions is met, and high-efficiency and low-cost production of hydrogen energy is realized.

Description

technical field [0001] The invention relates to the field of new energy hydrogen production, in particular to a wind-solar complementary hydrogen production power station system based on a ±600V DC microgrid. Background technique [0002] With China's goal of "carbon peaking and carbon neutrality", new energy sources such as wind power and photovoltaics will develop greatly in the future. Since the areas rich in wind power and photovoltaic resources are mostly remote areas in the central and western regions, the storage and transmission of new energy power will definitely become One of the important factors restricting the development of new energy, using new energy to generate electricity for in-situ water electrolysis hydrogen production can effectively alleviate the problem of abandoning wind and light caused by the slow construction of power transmission channels. [0003] At present, most of the same type of multi-energy complementary hydrogen production power plants us...

AI Technical Summary

Problems solved by technology

The most mature technology of the hydrogen production system is DC water electrolysis hydrogen production. If an AC power supply system is used, transformer step-down and rectification conversion are required. At the same time, photovoltaic and energy storage systems are both DC power generation systems. For wind power and photovoltaic complementary hydrogen production systems , from power generation equipment to water electrolysis hydrogen production, electric energy needs to be converted multiple times, which increases the complexity of the system geometrically, greatly reduces the energy conversion efficiency and increases the construction cost of the power station

The high cost of hydrogen energy production is also one of the important reasons restricting the development of the hydrogen production industry

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