CN-122026442-A - Electrolysis hydrogen production system based on power cooperation of multiple independent energy storage units and regulation and control method

CN122026442ACN 122026442 ACN122026442 ACN 122026442ACN-122026442-A

Abstract

The invention provides an electrolytic hydrogen production system based on the power cooperation of a plurality of independent energy storage units and a regulation and control method, and relates to the field of green technology and smart power grids, wherein the system comprises an electrolytic tank, a deoxidization module, a circulating water module, a fan unit, a fan energy storage module, a main battery energy storage module, a deoxidization battery energy storage module, a circulating water energy storage module, a high-voltage power supply bus and a low-voltage power supply bus; the output end of the fan unit is connected with the high-voltage power supply bus and the fan energy storage module, the main battery energy storage module and the electrolytic tank are connected with the high-voltage power supply bus, and the deoxidization module, the circulating water module, the deoxidization battery energy storage module and the circulating water energy storage module are connected with the low-voltage power supply bus, so that the device has the advantage of improving the stability of electrolytic hydrogen production.

Inventors

LI JIN
BAI PENG
HUO SHIMING

Assignees

山西国际能源集团储能股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (10)

1. The electrolytic hydrogen production system based on the power cooperation of a plurality of independent energy storage units is characterized by comprising an electrolytic tank, a deoxidization module, a circulating water module, a fan unit, a fan energy storage module, a main battery energy storage module, a deoxidization battery energy storage module, a circulating water energy storage module, a high-voltage power supply bus and a low-voltage power supply bus; The output end of the fan unit is connected with a high-voltage power supply bus and a fan energy storage module; The main battery energy storage module and the electrolytic tank are connected with a high-voltage power supply bus; The deoxidation module, the circulating water module, the deoxidation battery energy storage module and the circulating water energy storage module are connected to the low-voltage power supply bus.
2. The electrolytic hydrogen production system based on power synergy of multiple independent energy storage units according to claim 1, wherein the main energy storage unit and the fan energy storage unit operate in a grid control mode; The deoxidization battery energy storage module and the circulating water energy storage module operate in a net construction control mode or a net following control mode.
3. The electrolytic hydrogen production regulation method based on the power cooperation of a plurality of independent energy storage units according to claim 2, which is applied to the electrolytic hydrogen production system based on the power cooperation of a plurality of independent energy storage units according to claim 1, and comprises the following steps: In a starting mode, the main energy storage unit is softly started, the main energy storage unit is controlled to operate in a network control mode, and the fan unit, the electrolytic tank, the deoxidizing module and the circulating water module are softly started one by one until a preset condition is met, wherein the fan energy storage unit, the deoxidizing battery energy storage module and the circulating water energy storage module are started, and the fan energy storage unit operates in the network control mode; in a normal operation mode, controlling the operation modes of the deoxidization battery energy storage module and the circulating water energy storage module according to a preset frequency range and the real-time frequency of the high-voltage power supply bus; and in a fault operation mode, disconnecting the high-voltage power supply bus from the low-voltage power supply bus, and controlling the deoxidization battery energy storage module and the circulating water energy storage module to operate in a network control mode.
4. The electrolytic hydrogen production regulation and control method based on power cooperation of multiple independent energy storage units according to claim 3, wherein in a normal operation mode, if the real-time frequency of the high-voltage power supply bus is within a preset frequency range, the deoxidization battery energy storage module and the circulating water energy storage module are controlled to operate in a grid following control mode, and charge and discharge power instructions are issued to the deoxidization battery energy storage module and the circulating water energy storage module according to wind power generation power, and if the real-time frequency of the high-voltage power supply bus is outside the preset frequency range, the deoxidization battery energy storage module and the circulating water energy storage module are controlled to operate in a grid construction control mode.
5. The electrolytic hydrogen production regulation and control method based on power cooperation of multiple independent energy storage units according to claim 3, wherein the step of issuing charge and discharge power instructions to the deoxidized battery energy storage module and the circulating water energy storage module according to wind power generation power comprises the following steps: Determining a current working condition according to the wind power generation power, wherein the current working condition is wind power generation ascending, wind power generation descending, wind power generation stopping and wind power generation shortage; and based on the current working condition, transmitting a charge and discharge power instruction to the deoxidization battery energy storage module and the circulating water energy storage module.
6. The electrolytic hydrogen production regulation and control method based on power cooperation of multiple independent energy storage units according to claim 5, wherein the step of issuing charge and discharge power instructions to the deoxidized battery energy storage module and the circulating water energy storage module based on the current working condition comprises the following steps: when the current working condition is that wind power generation rises, the charging power of the deoxidized battery energy storage module is calculated based on the following formula: Wherein, the To deoxidize the charging power of the battery energy storage module, Is the discharge power of the main battery energy storage module, For the rated charge and discharge power of the deoxidized battery energy storage module, To deoxidize the state of charge of the battery energy storage module, To deoxidize the target state of charge of the battery energy storage module, For the rated capacity of the deoxidized battery energy storage module, For a time interval during which a charge-discharge power command is issued.
7. The electrolytic hydrogen production regulation and control method based on power cooperation of multiple independent energy storage units according to claim 5, wherein the step of issuing charge and discharge power instructions to the deoxidized battery energy storage module and the circulating water energy storage module based on the current working condition comprises the following steps: When the current working condition is that wind power generation is reduced, the discharging power of the deoxidized battery energy storage module is calculated based on the following formula: Wherein, the In order to deoxidize the discharge power of the battery energy storage module, For the operating power of the electrolyzer at time t-1, The wind power at the time t is the wind power at the time t, For the rated charge and discharge power of the deoxidized battery energy storage module, To deoxidize the state of charge of the battery energy storage module, To deoxidize the target state of charge of the battery energy storage module, For the rated capacity of the deoxidized battery energy storage module, For a time interval during which a charge-discharge power command is issued.
8. The electrolytic hydrogen production regulation and control method based on power cooperation of multiple independent energy storage units according to claim 5, wherein the step of issuing charge and discharge power instructions to the deoxidized battery energy storage module and the circulating water energy storage module based on the current working condition comprises the following steps: When the current working condition is that wind power generation is stopped, the discharging power of the deoxidized battery energy storage module is calculated based on the following formula: Wherein, the In order to deoxidize the discharge power of the battery energy storage module, For the lowest maintenance power of the deoxygenation module, The wind power at the time t is the wind power at the time t, For the rated charge and discharge power of the deoxidized battery energy storage module, To deoxidize the state of charge of the battery energy storage module, To deoxidize the target state of charge of the battery energy storage module, For the rated capacity of the deoxidized battery energy storage module, For a time interval during which a charge-discharge power command is issued.
9. The electrolytic hydrogen production regulation and control method based on power cooperation of multiple independent energy storage units according to claim 5, wherein the step of issuing charge and discharge power instructions to the deoxidized battery energy storage module and the circulating water energy storage module based on the current working condition comprises the following steps: When the current working condition is insufficient wind power generation, the supporting power of the circulating water energy storage module is calculated based on the following formula: Wherein, the For the support power of the circulating water energy storage module, For the minimum maintenance power of the circulating water module, The wind power at the time t is the wind power at the time t, The rated charge and discharge power of the circulating water energy storage module, For the state of charge of the circulating water energy storage module, For a target state of charge of the circulating water energy storage module, For the rated capacity of the circulating water energy storage module, For a time interval during which a charge-discharge power command is issued.
10. The electrolytic hydrogen production regulation and control method based on the power cooperation of multiple independent energy storage units according to any one of claims 3 to 9, wherein the preset condition is that the output power of a fan unit reaches a maximum value point or that an electrolytic tank reaches a rated power operation point.

Description

Electrolysis hydrogen production system based on power cooperation of multiple independent energy storage units and regulation and control method Technical Field The invention relates to the field of green technology and smart power grids, in particular to an electrolytic hydrogen production system based on power cooperation of multiple independent energy storage units and a regulation and control method. Background Under the background of global energy transformation acceleration, the green technology has become a core path for realizing a 'double carbon' target, wherein hydrogen energy is used as clean and efficient secondary energy, and large-scale preparation of the hydrogen energy is important for constructing a zero-carbon energy system. The renewable energy source is utilized to generate electricity to drive the electrolyzed water to produce hydrogen, so that the difficult problem of renewable energy source consumption can be solved, the flexibility of an energy source system is improved, and the seasonal energy storage can be realized through 'electricity-hydrogen' coupling, thereby being an important application direction of the green technology. However, the randomness and volatility of wind power generation lead to frequent abrupt change of the input power of the electrolytic tank, the problems of reduction of electrolytic efficiency, shortening of equipment service life, mixed risk of hydrogen and oxygen and the like are easily caused, the traditional single energy storage equipment is limited by the maximum charge and discharge power and the management constraint of the state of charge, short-time power impact (such as gust) and long-time windless energy supply gaps are difficult to be simultaneously handled, and once the energy storage equipment is in fault protection, auxiliary systems such as deoxidation, cooling water circulation and the like lose power, oxygen dissolution and even explosion can be caused, so that the safety of the system is seriously threatened. In the prior art, a single energy storage unit (such as a lithium battery or hydrogen energy storage) is generally adopted in a wind power off-grid hydrogen production system, and a regulation strategy of the system lacks multi-time scale power distribution capability, namely electrochemical energy storage can rapidly respond to second-level power fluctuation, but the capacity configuration cost is high, and hydrogen energy storage can provide long-term support but has delayed dynamic response when the system is in an hour-level windless working condition, so that an electrolytic tank runs away from a rated working condition for a long time. In addition, the auxiliary system (such as a deoxidizing unit) is not provided with independent energy storage, an emergency energy supply path is lacked when the main energy storage fails, and the risk resistance of the system is weak. At present, although the safety can be improved by increasing the energy storage capacity, the initial investment and the operation and maintenance cost can be obviously increased, the independent power supply problem of auxiliary load is not solved, and the requirement of the intelligent power grid on collaborative optimization of the source network and the charge storage is difficult to meet. Therefore, it is necessary to provide an electrolytic hydrogen production system and a regulation method based on the power cooperation of multiple independent energy storage units, and the stability of electrolytic hydrogen production is improved by fusing the bidirectional interaction characteristic of the green technology and the smart grid. Disclosure of Invention The invention provides an electrolytic hydrogen production system based on power cooperation of multiple independent energy storage units, which comprises an electrolytic tank, a deoxidization module, a circulating water module, a fan unit, a fan energy storage module, a main battery energy storage module, a deoxidization battery energy storage module, a circulating water energy storage module, a high-voltage power supply bus and a low-voltage power supply bus, wherein the output end of the fan unit is connected with the high-voltage power supply bus and the fan energy storage module, the main battery energy storage module and the electrolytic tank are connected with the high-voltage power supply bus, and the deoxidization module, the circulating water module, the deoxidization battery energy storage module and the circulating water energy storage module are connected with the low-voltage power supply bus. Further, the main energy storage unit and the fan energy storage unit operate in a net construction control mode, and the deoxidization battery energy storage module and the circulating water energy storage module operate in a net construction control mode or a net following control mode. The invention provides an electrolytic hydrogen production regulation and control method based on power cooperation of