Power distribution strategy of distributed wind power hydrogen production hybrid energy storage system

A technology of a hybrid energy storage system and a distribution strategy, which is applied in the field of power distribution strategy of a distributed wind power hydrogen-producing hybrid energy storage system, can solve problems such as potential safety hazards, dangers of electrolyzers and hydrogen storage devices, and influence on the purity of electrolytes, so as to improve utilization efficiency, prolonging service life and improving operating efficiency

Pending Publication Date: 2022-08-02
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, random fluctuations in the supply of renewable energy lead to frequent changes in the operating voltage of the electrolyte battery, which significantly reduces the operating voltage of the electrolyte battery and shortens the working life of the electrolyte battery. The device brings danger and poses certain safety hazards

Method used

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  • Power distribution strategy of distributed wind power hydrogen production hybrid energy storage system
  • Power distribution strategy of distributed wind power hydrogen production hybrid energy storage system
  • Power distribution strategy of distributed wind power hydrogen production hybrid energy storage system

Examples

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Effect test

Embodiment 1

[0064] The present invention provides an embodiment, which is a power distribution strategy for a distributed wind power hydrogen production hybrid energy storage system. On the basis of the grid-connected technology of the permanent magnet wind power generation system, the DC bus is coupled with the alkaline electrolyzer, fuel cell and lithium battery, considering the optimal working range of the alkaline electrolyzer, the pressure of the hydrogen storage tank and the lithium battery. state of charge, and proposed a power distribution strategy for a distributed wind power-to-hydrogen hybrid energy storage system.

[0065] At present, dual PWM rectifiers are widely used in wind power grid connection, so that the electric energy can realize AC / DC / AC change. Firstly, the control scheme of the grid-connected permanent magnet wind turbine is described. Due to the fluctuation of wind power output, an energy storage link is introduced to make the system run stably. Based on this wi...

Embodiment 2

[0074] The present invention provides another embodiment, which is a power distribution strategy for a distributed wind power hydrogen production hybrid energy storage system, which specifically includes the following steps:

[0075] Step 1. Establish a wind power hydrogen production hybrid energy storage system with an alkaline electrolyzer, a hydrogen fuel cell and a lithium battery coupled with a common DC bus. The hydrogen produced by the alkaline electrolyzer is stored in a hydrogen storage tank, and the capacity of each module is determined. ,As shown in Table 1.

[0076] Table 1 Capacity of each module of the system

[0077] Equipment type Equipment capacity or rated power Wind Turbines 1500kW Alkaline Electrolyzer 100kW hydrogen fuel cell 60kW lithium battery 750kWh gas tank 500kWh

[0078] The machine-side converter adopts zero D-axis control, and the electromagnetic torque of the synchronous motor is controlled by c...

Embodiment 3

[0114] Based on the same inventive concept, an embodiment of the present invention also provides a computer device, including a storage medium, a processor, and a computer program stored on the storage medium and executed on the processor. When the processor executes the computer program, the steps of implementing any one of the power distribution strategies of the distributed wind power and hydrogen production hybrid energy storage system described in Embodiment 1 or 2 are implemented.

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Abstract

The invention belongs to the technical field of hybrid energy storage system power distribution and coordination control, and particularly relates to a distributed wind power hydrogen production hybrid energy storage system power distribution strategy. The method comprises the following steps: establishing a wind power hydrogen production hybrid energy storage system of a common direct current bus, and determining the capacity of each module; modulating a trigger signal of the grid-side converter to control the switching sequence of each bridge arm; analyzing the working characteristics of hydrogen production of the alkaline electrolytic cell to obtain an optimal hydrogen production power interval; performing mathematical modeling on the hydrogen production system according to an electrolytic hydrogen production mechanism; formulating a power distribution strategy based on the energy conservation definition, the power constraint of the alkaline electrolytic bath, the power constraint of the hydrogen storage tank and the charge state constraint of the lithium battery; a decision structure of a power distribution strategy is used as a given value of a control system, and an energy storage side adopts a control strategy of a power outer loop and a current inner loop. The hydrogen production efficiency can be improved while stable operation of the system is ensured, the hydrogen production energy consumption is reduced, and the service life of equipment is prolonged.

Description

technical field [0001] The invention belongs to the technical field of power distribution and coordinated control of a hybrid energy storage system, and in particular relates to a power distribution strategy for a distributed wind power hydrogen production hybrid energy storage system, which is suitable for hydrogen production power distribution in a wind power generation system. The power distribution strategy considering the optimal operating power range of the hydrogen production equipment, the state of charge constraints of the lithium battery and the pressure constraints of the hydrogen storage tank is considered. Background technique [0002] With the rapid development of the economy and society, the demand for energy is increasing day by day, and relying on the energy system that is still dominated by traditional fossil energy at this stage will further increase the demand for and dependence on traditional fossil energy. The "carbon peak" and "carbon neutrality" are c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/28H02J3/32H02J3/38H02J3/48H02J3/50H02J3/24
CPCH02J3/28H02J3/32H02J3/381H02J3/48H02J3/50H02J3/24H02J2300/28H02J2300/30H02J2203/20Y02E70/30
Inventor 刘凯韩子娇葛延峰董鹤楠李家珏李胜辉戈阳阳李宠那广宇王亮李峰程绪可李平张冠锋王优胤屈超郑志勤白雪张潇桐董雁楠马少华姚鑫高馥琳
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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