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High-capacity off-grid wind-solar complementary hydrogen production direct-current micro-grid and control method thereof

A DC micro-grid and wind-solar hybrid technology, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problems of large system safety risks, voltage and power influence, and large fault influence range, so as to improve operation reliability, Effects of reduced capacity, improved power factor and harmonic quality

Active Publication Date: 2022-04-22
NAVAL UNIV OF ENG PLA
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Problems solved by technology

Due to the randomness of power generation capacity of different new energy stations, it is easy to cause voltage fluctuations and oscillations in different frequency bands on the same AC power grid, which brings greater security risks to the entire system; when a source short circuit occurs in the system, the voltage and The power is affected, and the fault affects a large range

Method used

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  • High-capacity off-grid wind-solar complementary hydrogen production direct-current micro-grid and control method thereof
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  • High-capacity off-grid wind-solar complementary hydrogen production direct-current micro-grid and control method thereof

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[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0039] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and oth...

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Abstract

The invention relates to a high-capacity off-grid wind-solar complementary hydrogen production direct-current micro-grid and a control method thereof, the micro-grid comprises m medium-voltage alternating-current sub-grids, a medium-voltage direct-current distribution board, k DC / DC hydrogen production power supplies, r DC / AC inverter power supplies and a low-voltage alternating-current network power supply, and each medium-voltage alternating-current sub-grid comprises a new energy station, an energy storage device and a medium-voltage alternating-current distribution board; an energy storage device adopts voltage raising constant frequency control, a photovoltaic power station and a wind turbine generator adopt constant power control, and a DC / DC hydrogen production power supply adopts an operation mode of constant input direct current voltage + constant output current control, so that the control target of'load moving along with a source 'can be realized, and the system load can be automatically adjusted according to the output change of a new energy field station; and meanwhile, all equipment is based on local control, so that the dependence of system cooperative control on a communication system and an energy management system is reduced.

Description

technical field [0001] The invention relates to the technical field of an off-grid wind-solar hybrid hydrogen production power system, in particular to a large-capacity off-grid wind-solar hybrid hydrogen production DC microgrid and a control method. Background technique [0002] Hydrogen energy is a clean, carbon-free, flexible and efficient secondary energy with rich application scenarios. It has the characteristics of high energy density, large capacity, long life, easy storage and transmission, etc. It can be used as a large-scale comprehensive green development storage for wind power and photovoltaics, The preferred option to use. The use of wind-solar hybrid hydrogen production can solve the problem of wind and photovoltaic power generation energy storage difficulties and maximize utilization, which is an important way for my country to achieve the goal of "carbon peak carbon neutrality". In the traditional grid-connected hydrogen production system, the electrolyzer g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/46H02J3/32H02J15/00
CPCH02J3/388H02J3/46H02J3/32H02J15/008H02J2300/24H02J2300/28Y02E70/30
Inventor 肖飞马凡胡祺王瑞田付立军范学鑫肖润龙
Owner NAVAL UNIV OF ENG PLA
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