Industrial park green electricity direct supply system and method

Abstract

The invention provides an industrial park green electricity direct supply system and method, and relates to the technical field of new energy. According to the power supply system, wind energy and solar energy are converted through a green electricity generation module to obtain green electricity energy, and adjustment and standby application of the green electricity energy are achieved in combination with a green electricity energy storage module; the green power transmission module is used for realizing voltage grade improvement and independently supplying load to the park; and centralized utilization of multiple loads such as electric power, heat energy, cold energy, hydrogen energy and oxygen is formed through the load energy consumption module, and continuous and high-proportion green energy supply is achieved. According to the scheme, efficient direct supply from electric energy production to electric energy transmission can be realized in the park, and the power supply stability of green electricity is improved; diversified load requirements are realized through various green energy sources, the energy utilization rate is improved, and the new energy consumption proportion is improved; and meanwhile, source traceability and independence are ensured on an energy transmission path, and the energy utilization efficiency, the operation reliability and the green energy utilization compliance of the park are improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of new energy, in particular, to an industrial park green electricity direct supply system and method. BACKGROUND

[0002] In the current energy supply and utilization process of industrial parks, with the continuous expansion of industrial production scale and the increasing demand for diversified energy, the energy system is facing more complex challenges. The traditional industrial park energy supply mode mainly relies on unified power supply of public power grids, supplemented by part of conventional energy, which can meet the basic production and living needs in the early stage, but its limitations gradually appear when facing the high-density, all-weather and multi-type load demand of modern parks.

[0003] The centralized power supply of public power grids is prone to power loss in long-distance transmission, and the power supply stability is insufficient in the case of large load fluctuation. There is a power supply shortage in peak period, and waste is easy to form in low valley period. The energy structure takes electricity as a single main body, which is difficult to meet the diversified load demand of heat, cold, hydrogen and oxygen, resulting in high overall operation cost of the park and poor energy utilization rate. Distributed new energy is applied in some parks, but due to the lack of effective load matching mechanism, the contradiction between the volatility of new energy output and the uncertainty of load demand is prominent, and the problem of abandoned wind and light is still serious. The energy transmission link usually depends on the transfer of public power grids, which is difficult to obtain an advantage in green certification and low-carbon competition. As can be seen, the related technology still has obvious deficiencies in power supply stability, energy diversification utilization, clean energy efficient consumption and green energy supply, etc.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] The purpose of the embodiments of the present disclosure is to provide an industrial park green electricity direct supply system and an industrial park green electricity direct supply method, which can improve the power supply stability of new energy, improve energy utilization efficiency, meet diversified load, increase new energy consumption ratio and enhance green energy use compliance.

[0006] Other characteristics and advantages of the present disclosure will become apparent from the following detailed description, or will be learned by practice of the present disclosure.

[0007] According to a first aspect of the embodiments of the present disclosure, an industrial park green electricity direct supply system is provided, comprising: The green electricity generation module is configured to convert the received wind energy and solar energy into green electricity energy, and the green electricity energy is distributed according to the real-time load demand of the industrial park. The green electricity storage module is connected with the green electricity generation module, configured to receive and store the green electricity energy when the green electricity energy output of the green electricity generation module is higher than the real-time load demand of the load energy consumption module, and release the stored green electricity energy when the green electricity energy output of the green electricity generation module is lower than the real-time load demand. The green electricity transmission module is connected with the green electricity generation module and the green electricity storage module, configured to receive the green electricity energy directly supplied by the green electricity generation module and the green electricity energy released by the green electricity storage module, and to improve the voltage level of the received green electricity energy, and to supply power to the load energy consumption module through a dedicated power transmission line independent of the power grid. The load energy consumption module is connected with the green electricity transmission module, configured to receive the green electricity energy transmitted by the green electricity transmission module, and to schedule different types of loads according to the production operation conditions of the industrial park.

[0008] In some example embodiments of the present disclosure, based on the foregoing scheme, the green electricity generation module comprises: A wind power generation unit is configured to convert the received wind energy into green electricity energy through a wind power generation assembly; A photovoltaic power generation unit is configured to convert the received solar energy into green electricity energy through a photovoltaic assembly; A photo-thermal power generation unit is configured to convert the received solar energy into green electricity energy through a heat collection assembly, and to supply steam after partial power generation to the thermal load of the industrial park; A biomass power generation unit is configured to convert the heat energy generated by burning or gasifying biomass raw materials into green electricity energy, and to synthesize green methanol by combining green hydrogen with green carbon dioxide as a byproduct, for the alcohol load of the industrial park; The wind power generation unit, the photovoltaic power generation unit, the photo-thermal power generation unit and the biomass power generation unit are connected in parallel to the green electricity storage module to achieve stable output power based on complementary characteristics.

[0009] In some example embodiments of the present disclosure, based on the foregoing scheme, the green electricity storage module comprises: An electrochemical energy storage unit is configured to charge when the green electricity energy output of the green electricity generation module is higher than the real-time load demand of the industrial park, and to discharge when the green electricity energy output is lower than the real-time load demand. The green hydrogen preparation unit is configured to generate green hydrogen and green oxygen by using the excess green electricity when the green electricity output of the green electricity generation module is higher than the real-time load demand of the industrial park, and collect and store the generated green hydrogen and green oxygen, and use part of the green hydrogen as input of the green electricity generation module to synthesize green methanol. The hydrogen energy storage unit is connected with the green hydrogen preparation unit, and is configured to convert the green hydrogen into electricity when there is a power shortage in the industrial park, and recover heat energy generated in the conversion process for use in the industrial park.

[0010] In some example embodiments of the present disclosure, based on the foregoing scheme, the green hydrogen preparation unit includes at least one of an alkaline water electrolysis hydrogen production device and a proton exchange membrane water electrolysis hydrogen production device.

[0011] In some example embodiments of the present disclosure, based on the foregoing scheme, the green oxygen generated in the hydrogen production process of the green hydrogen preparation unit is stored after purification and compression, and is delivered to the load energy module and the green electricity generation module by pipeline or skid-mounted vehicle to serve as a supply source of oxygen load of the industrial park and a supply source of green methanol synthesized by the green electricity generation module.

[0012] In some example embodiments of the present disclosure, based on the foregoing scheme, the hydrogen energy storage unit uses a hydrogen fuel cell or a hydrogen internal combustion engine as an energy conversion device, which is configured to collect waste heat generated in the conversion process when the green hydrogen is converted into green electricity, and supply the waste heat to the thermal load of the industrial park when the utilization cost of the waste heat is lower than the electric heating cost of the load energy module.

[0013] In some example embodiments of the present disclosure, based on the foregoing scheme, the green electricity transmission module includes: The booster station unit is configured to select a corresponding voltage level of a boosting configuration according to the installed capacity of the green electricity generation module and the green electricity storage module, and to raise the voltage level of the green electricity to be transmitted by the boosting configuration; The power transmission unit is connected with the booster station unit, and is configured to transmit the green electricity with raised voltage level to the load energy module through a dedicated power transmission line independent of the power grid after receiving the output of the booster station unit, so as to ensure that the industrial park is preferentially supplied with green electricity.

[0014] In some example embodiments of the present disclosure, based on the foregoing scheme, the access section of the power transmission unit is connected with the outlet of the boosting line of the booster station unit, and the output section of the power transmission unit is connected with the variable booster station of the load energy module, so that the voltage level of the green electricity adjusted by the variable booster station meets the voltage level requirement of each electrical equipment in the load energy module.

[0015] In some example embodiments of the present disclosure, based on the foregoing scheme, the load energy module includes an electric load, a cold load, a heat load, a hydrogen load, an oxygen load, and an alcohol load, and the load energy module is configured to receive green electricity, green hydrogen, green oxygen, and waste heat according to the production operation conditions of the industrial park, thereby forming a plurality of energy collaborative utilization modes.

[0016] According to a second aspect of the embodiments of the present disclosure, an industrial park green electricity direct supply method is provided, including: The wind energy and solar energy received by the green electricity generation module are converted to generate green electricity, and the distribution path of the green electricity is determined according to the real-time load demand of the industrial park; When the output of the green electricity is higher than the real-time load demand of the load energy module, the surplus green electricity is input to the green electricity storage module for storage; when the output of the green electricity is lower than the real-time load demand, the stored green electricity is released from the green electricity storage module; The green electricity received from the green electricity generation module and the green electricity released from the green electricity storage module is received by the green electricity transmission module, the voltage level of the received green electricity is raised, and the raised green electricity is supplied to the load energy module through a dedicated power transmission line independent of the power grid; When the load energy module receives the green electricity transmitted by the green electricity transmission module, the green electricity is dispatched to the corresponding electric load, heat load, cold load, hydrogen load, oxygen load, and alcohol load according to the production operation conditions of the industrial park.

[0017] The technical solutions provided by the embodiments of the present disclosure can include the following beneficial effects: The industrial park green electricity direct supply system in the example embodiments of the present disclosure can maintain the continuity and stability of power supply in the whole link process from the generation to the use of green electricity, thereby realizing reliable support for high-density loads in the park. The direct connection of energy between different links enables the green electricity to maintain a high effective utilization rate in the transmission process, thereby improving the quality of power supply in the park as a whole. The corresponding adjustment relationship between green electricity supply and park load is established, and the supply-demand difference in different time periods can be effectively balanced, thereby making the energy utilization logically balanced and avoiding the waste of redundant electricity while realizing continuous energy supply. By configuring energy forms with different attributes in the energy composition, the park can simultaneously obtain the scheduling of electric power, cold energy, heat energy and gas energy in operation, thereby enabling multiple types of loads to obtain direct response and improving the flexibility of the system. In the case of new energy access, the park can absorb surplus electricity in the new energy high-output stage through the supply-demand matching logic, and realize smooth compensation in the new energy insufficient stage, thereby increasing the new energy consumption ratio and maintaining the stability of power supply. With the diversified configuration of energy forms, the overall operation efficiency of the park is improved, and the resource utilization is optimized. On the power transmission path, by setting a transmission mode independent of the public power grid, the source and destination of the electricity can be ensured to be clear, and the energy supply chain can realize direct supply in a physical sense, thereby enabling the energy consumed by the park to be identified as green source, which not only improves the compliance of the park in green development certification, but also makes the park have higher competitiveness when facing external competition and green product market.

[0018] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure. It is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 The structure schematic diagram of the industrial park green electricity direct supply system according to some embodiments of the present disclosure is schematically shown.

[0021] Figure 2 The structure schematic diagram of the industrial park green electricity direct supply system and each module according to some other embodiments of the present disclosure is schematically shown.

[0022] Figure 3A flowchart schematically illustrating a method of industrial park green electricity direct supply is shown.

[0023] In the drawings, like or corresponding elements shown in different figures are designated with like reference numerals. DETAILED DESCRIPTION

[0024] The exemplary embodiments will now be described in detail with reference to the drawings. The following description is directed to the accompanying drawings, wherein the same or equivalent elements are referred to with the same or similar reference numerals. The implementation described in these exemplary embodiments is not meant to represent all implementations consistent with this description. Rather, they are merely examples in accordance with some aspects of this description as detailed in the appended claims.

[0025] Example implementations are now described with reference to the drawings. Example implementations can, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art.

[0026] Moreover, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the implementations of this disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, devices, methods, and so forth have not been described in detail in order to avoid obscuring aspects of the present disclosure.

[0027] In addition, the drawings are merely schematic and are not necessarily drawn to scale. The illustrations in the drawings are for the purpose of describing example implementations and do not limit the scope of this disclosure. The figures depict example implementations to illustrate the practical application of the principles described herein. The figures are not intended to limit or restrict the concepts, application, or scope of the disclosure in any way. Figures 1-3 illustrate example implementations of a method of industrial park green electricity direct supply.

[0028] In this example embodiment, a green electricity direct supply system for an industrial park is first provided. The green electricity direct supply system for an industrial park can be applied to various types of industrial parks, and is particularly suitable for production and operation scenarios with high energy consumption and multiple energy demands. For example, it can be applied in a computing center or a data center, and can realize the stable direct supply of large-scale power loads, and meet the cooling or heating needs through the use of waste heat; in traditional high-energy-consuming industrial parks such as metallurgy, chemical industry, and building materials, the production process can be supported by the comprehensive supply of electricity, hydrogen, and oxygen, and carbon emissions can be reduced while ensuring continuous power supply; in new energy equipment manufacturing or foreign trade export-oriented parks, green energy certification can be achieved through an independent green electricity direct supply channel, thereby enhancing the competitiveness of products in the international market; in comprehensive industrial new cities and zero-carbon demonstration parks, an overall energy supply pattern of electricity, heat, cold, hydrogen, and oxygen can be formed to complement each other, providing support for the park to achieve green and low-carbon transformation and sustainable development.

[0029] Figure 1 The following schematically shows the structure of the green electricity direct supply system for an industrial park according to some embodiments of the present disclosure. Figure 1 As shown, the industrial park green electricity direct supply system 100 may include a green electricity generation module 110, a green electricity energy storage module 120, a green electricity transmission module 130, and a load energy consumption module 140. The green electricity generation module 110 can be used to convert the received wind energy and solar energy to output green electricity. The green electricity can be distributed according to the real-time load demand of the industrial park.

[0030] Among them, the real-time load demand of the industrial park refers to the total instantaneous consumption of electric energy by various production and supporting facilities in the park at different time scales. Its sources include the operating power of electromechanical equipment, computing power load of data centers, heating or cooling requirements of process, lighting and daily electricity consumption, and other multi-dimensional superpositions. The monitoring of real-time load demand can be achieved through the deployment of smart meters, power sensors and energy management terminals at all levels of nodes in the park's distribution network. These devices can collect voltage, current and power data at sampling intervals of seconds or minutes, and transmit them to the park's energy management center via the communication network for summary analysis. During the analysis process, load forecasting algorithms and trend recognition models can be used to predict short-term fluctuations and medium- and long-term changes, thereby forming a real-time portrait of the park's energy consumption. This embodiment is not limited to this.

[0031] The distribution path refers to the flow direction and distribution mode of the green electricity generation module when outputting the generated green electricity. Specifically, when the current load of the park is within the output capacity of the renewable energy, the distribution path can preferentially deliver the green electricity to the load energy module through the booster unit to achieve direct supply. When the load is lower than the power output, the distribution path can automatically switch part of the electricity to the green electricity storage module 120 for storage to avoid power abandonment. When the load exceeds the power output, the distribution path releases the green electricity in the green electricity storage module 120 and superimposes it on the current power output before delivering it to the load end. The execution of the distribution path can rely on the control logic of the park energy management system, which can dynamically switch the power flow based on real-time data and realize physical switching of energy flow through the coordination control of circuit breakers, intelligent switches and inverters. In an alternative implementation, the adjustment of the distribution path can also combine priority strategies, such as prioritizing the supply of electricity to critical production loads such as metallurgical furnaces and computing center rooms, while arranging secondary or delayed loads during power surplus periods. An artificial intelligence-based load scheduling algorithm can also be introduced to predict the production conditions and environmental trends of the park through big data to adjust the distribution path in a more forward-looking manner, thereby reducing transient impact and frequent switching. The present example embodiment does not make special limitations on this.

[0032] The green electricity storage module 120 is connected to the green electricity generation module 110 and can be used to receive and store green electricity when the green electricity output of the green electricity generation module 110 is higher than the real-time load demand of the load energy module 140, and to release the stored green electricity when the green electricity output of the green electricity generation module 110 is lower than the real-time load demand.

[0033] When the system identifies that the green electricity output of the green electricity generation module 110 is higher than the real-time load demand of the park, the system can direct the excess electricity to the green electricity storage module 120 for energy reception and storage through the converter. For example, the electrochemical energy storage unit in the green electricity storage module 120 can adjust the voltage and current of the battery pack through the charge controller to store electricity efficiently within the rated operating range; in parallel configuration, the green hydrogen preparation unit in the green electricity storage module 120 receives the remaining electricity, performs water electrolysis reaction through the electrolytic cell to produce green hydrogen and green oxygen, and directs the green hydrogen to the hydrogen energy storage unit in the green electricity storage module 120 for compression or tank storage. Part of the green hydrogen can also be delivered to the biomass power generation unit for the synthesis of green methanol, while the green oxygen is collected, purified and compressed for standby. The control strategy in this stage can be based on a real-time power balance model to ensure that the green electricity storage module 120 absorbs energy preferentially when there is excess electricity, thereby reducing the phenomenon of wind and light abandonment.

[0034] When the load demand of the park exceeds the power generation output of the green electricity generation module 110, the system triggers the green electricity storage module 120 to enter the discharging state. For example, the electrochemical energy storage unit in the green electricity storage module 120 can be controlled to convert direct current into alternating current through an inverter and maintain consistency with the voltage and frequency of the load side, thereby directly supplementing the power gap; the hydrogen storage unit in the green electricity storage module 120 is controlled to convert stored green hydrogen into electrical energy through a hydrogen fuel cell or a hydrogen internal combustion engine, and recover waste heat for use in the park heat load during the energy conversion process; the release logic combines factors such as the remaining capacity of the green electricity storage module 120, the state of charge (SOC) of the battery, the green hydrogen reserves, and the load demand priority during execution to make a comprehensive judgment to ensure the stability and safety of energy storage release.

[0035] The green electricity transmission module 130 is connected with the green electricity generation module 110 and the green electricity storage module 120, and can be used to receive green electricity energy supplied directly by the green electricity generation module and green electricity energy released by the green electricity storage module, and to upgrade the voltage level of the received green electricity energy, and to supply power to the load energy module through a dedicated power transmission line independent of the power grid. Among them, the voltage level upgrade refers to adjusting the medium and low voltage output by the power generation end or the energy storage end to a voltage level suitable for power transmission and load center access through a voltage boosting device, thereby reducing the current intensity in the transmission process, reducing line loss and improving power transmission distance.

[0036] The load energy module 140 is connected with the green electricity transmission module 130, and can be used to receive green electricity energy transmitted by the green electricity transmission module 130, and to dispatch different types of loads according to the production and operation conditions of the industrial park.

[0037] According to the industrial park green electricity direct supply system in the example embodiment, by forming an organic connection of power generation, energy storage and transmission within the industrial park, the continuity and stability of power supply can be maintained in the whole link process from the generation to the use of green electricity, thereby realizing reliable support for high-density loads in the park. The direct connection of energy between different links enables the green electricity to maintain a high effective utilization rate during transmission, thereby improving the quality of power supply in the park as a whole. The corresponding adjustment relationship between green electricity supply and park load is established, and the supply-demand difference in different time periods can be effectively balanced, thereby making the energy utilization logically balanced, avoiding the waste of redundant electricity and realizing continuous energy supply. By configuring energy forms with different attributes in the energy composition, the park can simultaneously obtain the scheduling of electric power, cold energy, heat energy and gas energy during operation, thereby enabling multiple types of loads to obtain direct response and improving the flexibility of the system. In the case of new energy access, the park can absorb surplus electricity during the new energy high-output stage through the supply-demand matching logic, and realize smooth compensation during the new energy insufficient stage, thereby increasing the new energy consumption ratio and maintaining the stability of power supply. With the diversified configuration of energy forms, the overall operation efficiency of the park is improved, and the resource utilization is optimized. On the power transmission path, by setting a transmission mode independent of the public power grid, the source and destination of the electricity can be ensured to be clear, and the energy supply chain can realize direct supply in a physical sense, thereby enabling the energy consumed by the park to be identified as green source, which not only improves the compliance of the park in green development certification, but also makes the park have higher competitiveness in the face of external competition and green product market.

[0038] In the following, the industrial park green electricity direct supply system in the example embodiment will be further described.

[0039] In an example embodiment of the present disclosure, referring to Figure 2 The green electricity generation module 110 can include a wind power generation unit 111, a photovoltaic power generation unit 112, a photo-thermal power generation unit 113, and a biomass power generation unit 114, wherein: The wind power generation unit 111 can be used to convert the received wind energy into green electricity. The wind power generation unit can utilize the kinetic energy of air flow to push the mechanical rotation through the wind turbine blades, and efficiently convert the mechanical energy into electrical energy. For example, the wind power generation unit can adopt horizontal axis or vertical axis wind turbine sets, which are composed of impellers, main shafts, gearboxes (such as eccentric gearboxes or direct drive methods), generators (optional synchronous or asynchronous structures), power electronic conversion systems (including rectifiers, inverters and controllers). The wind power generation unit can also be equipped with meteorological sensors such as anemometers and wind vanes to realize feedback adjustment of the blade variable pitch control device or variable speed control strategy, thereby optimizing the matching of rotation speed and output power.

[0040] The photovoltaic power generation unit 112 can be used to convert received solar energy into green electricity; the photovoltaic power generation unit can utilize the photovoltaic effect, that is, when solar radiation shines on a semiconductor material, a photon excitation generates an electron-hole pair, and under the action of an electric field, a current is formed, thereby completing the direct conversion of light energy into electrical energy. The photovoltaic power generation unit mainly consists of photovoltaic components, a current combiner, a power converter, and a monitoring and control unit. The photovoltaic components can use single-crystal or polycrystalline silicon solar panels, or use thin-film cells, cadmium telluride cells, or perovskite cells to adapt to different application scenarios. Each photovoltaic component is electrically connected through a direct-current combiner box to ensure that the direct-current power output by the components is concentrated and then input into an inverter, which converts the direct-current power into alternating green electricity for subsequent energy storage or direct load use.

[0041] In some optional embodiments, the photovoltaic power generation unit 112 can cooperate with a maximum power point tracking (MPPT) algorithm to automatically adjust the operating voltage under different light intensities and temperature conditions, thereby maximizing solar energy utilization. The inclination and azimuth of the photovoltaic components can be designed according to the geographical location and solar radiation distribution of the park to obtain the optimal incident light intensity. The photovoltaic array can be arranged in a centralized ground power station mode or a distributed rooftop photovoltaic mode, and the park can also use photovoltaic curtain walls, photovoltaic parking canopies, and other building-integrated designs to achieve efficient use of site resources. In addition to the inverter, the power converter also includes a direct-current-direct-current converter for stabilizing the voltage before current combination to ensure the efficiency and stability of the subsequent power conversion process. The monitoring and control unit can include an irradiance sensor, a temperature sensor, and a current sensor to collect environmental and operating data in real time and regulate the output of the photovoltaic power generation unit through an energy management system.

[0042] The solar-thermal power generation unit 113 can concentrate solar radiation through a heat collection device and heat a working medium, which can be water or molten salt, to generate high-temperature and high-pressure steam to drive a steam turbine to generate electricity. Compared with photovoltaic power generation, solar-thermal power generation has a natural long-term energy storage feature, and its heat storage device can continuously release heat during insufficient light or at night to drive the unit to operate stably, similar to the role of a conventional thermal power unit. Through this feature, solar-thermal power generation can effectively balance the volatility of wind power and photovoltaic power output, making the power supply of the entire green electricity generation module more stable and matching the continuous operation requirements of the industrial park load side. In addition, during solar-thermal power generation, part of the low-temperature and low-pressure steam after work by the steam turbine can be extracted to provide heat energy for heating or process steps in the park, thereby achieving electric and heat dual supply and improving the comprehensive energy utilization rate.

[0043] The biomass power generation unit 114 can generate heat energy and drive a steam turbine or a gas turbine to generate electricity by burning, gasifying or pyrolyzing biomass raw materials such as straw, forest waste or organic waste. The biomass power generation unit 114 can not only provide stable green electricity for the industrial park, but also produce carbon dioxide in the process of burning or gasification, which belongs to renewable carbon sources. The green carbon dioxide can be further synthesized into green methanol by combining with green hydrogen, which can be used as a basic chemical raw material in the chemical process of the industrial park, thereby forming an electric-hydrogen-carbon recycling path in the park. Therefore, the biomass power generation unit not only meets the demand for electricity and heat, but also provides green carbon sources, promoting the deep coupling of clean energy and green chemicals in the industrial park.

[0044] The wind power generation unit 111 and the photovoltaic power generation unit 112 are connected in parallel to the green electricity storage module at the output end, and stable output power is realized based on the complementary characteristics of wind and light. The output power of the wind power generation unit has small day-night difference, and has strong output when the wind speed is large at night and in winter. The output power of the photovoltaic power generation unit is mainly concentrated in the daytime, summer and fine weather conditions, and has obvious day-night periodicity and seasonal difference. After connecting the two in parallel to the green electricity storage module, the difference in time and spatial distribution of wind energy and solar energy can be utilized, thereby forming a complementary effect in output. When the light condition is good and the wind speed is low, the photovoltaic power generation unit provides the main output; when the photovoltaic power generation unit output is insufficient at night or in rainy weather, the wind power generation unit supplements the electricity; in the period when wind and light are high, the green electricity storage module can absorb the excess electricity for storage, avoiding the phenomenon of abandoned wind and light.

[0045] By connecting the wind power generation unit and the photovoltaic power generation unit in parallel to the green electricity storage module, stable output power is realized based on the complementary characteristics of wind and light, which can effectively avoid the fluctuation caused by the influence of seasonality, day-night change or weather conditions on a single energy, thereby improving the continuity and stability of green electricity supply in the industrial park, and reducing the dependence on grid electricity.

[0046] In an example embodiment of the present disclosure, continuing to refer to Figure 2 As shown in the figure, the green electricity storage module 120 can include an electrochemical energy storage unit 121, a green hydrogen preparation unit 122 and a hydrogen energy storage unit 123, wherein: The electrochemical energy storage unit 121 is used to charge when the green electricity energy output of the green electricity generation module is higher than the real-time load demand of the industrial park, and to discharge when the green electricity energy output is lower than the real-time load demand. The electrochemical energy storage unit can realize the bidirectional conversion of electrical energy and chemical energy through reversible electrochemical reactions. When there is excess green electricity energy, the electrode reaction is driven to make ions migrate in the electrolyte and complete the charging process. When there is insufficient green electricity energy, the reverse electrochemical reaction releases the stored energy to form a current supply load. For example, the electrochemical energy storage unit can include lithium ion batteries, sodium-sulfur batteries, or flow batteries. The battery cells in the electrochemical energy storage unit can be controlled in groups by a battery management system, which has overcharge protection, overdischarge protection, and temperature management functions. During charging and discharging, the power conversion system exchanges direct current green electricity energy and alternating current systems through a bidirectional inverter for efficient energy exchange, and the energy management system coordinates the charging and discharging strategy to extend the battery life and improve the energy storage efficiency. The introduction of the electrochemical energy storage unit can achieve peak shaving when the supply and demand of the park are mismatched, making the supply of green electricity energy more stable, and effectively improving the proportion of new energy consumption.

[0047] The green hydrogen preparation unit 122 is used to prepare green hydrogen and green oxygen from excess green electricity energy when the green electricity energy output of the green electricity generation module is higher than the real-time load demand of the industrial park, and to collect and store the prepared green hydrogen and green oxygen, and to use part of the green hydrogen as input for the green electricity generation module to synthesize green methanol. The green hydrogen preparation unit can be realized by water electrolysis reaction, that is, using green electricity energy as an external electric field driving force to decompose water molecules at the anode and cathode of the electrolytic cell to generate green oxygen and green hydrogen. Its working principle is that the anode reaction generates green oxygen and releases electrons, and the cathode reaction generates green hydrogen and consumes electrons, thereby completing the water decomposition process. For example, the green hydrogen preparation unit can use an alkaline water electrolysis device, or a proton exchange membrane water electrolysis (PEM) device. The electrolytic cell is composed of electrodes, electrolyte, and separator, and is assisted by a gas separation and purification device to ensure the purity of green hydrogen and green oxygen. In some optional embodiments, the green hydrogen preparation unit can also be configured with a gas compressor and a storage tank to realize high-pressure storage or low-temperature liquefaction of the product gas. Through the green hydrogen preparation unit, excess green electricity energy can be converted into green hydrogen that can be stored for a long time and applied in multiple scenarios, for example, green hydrogen can be combined with green carbon dioxide generated by the biomass power generation unit in the green electricity generation module to synthesize green methanol, realize carbon cycle, and at the same time produce green oxygen byproduct that can be used, thereby effectively improving the overall utilization rate of green electricity energy in the park.

[0048] The hydrogen energy storage unit 123 is connected with the green hydrogen preparation unit 122, and is used to convert the green hydrogen into electric energy when there is a lack of electricity in the industrial park, and to recover the heat energy in the conversion process for use in the park. The hydrogen energy storage unit can realize dual supply of electric energy and heat energy through energy conversion of green hydrogen, for example, the energy conversion process of the hydrogen energy storage unit can include hydrogen fuel cell reaction or hydrogen internal combustion engine combustion process. In the hydrogen fuel cell, green hydrogen releases electrons and separates from protons at the anode, protons migrate to the cathode through the electrolyte membrane, react with green oxygen to generate water, and at the same time form an electric current output in the external circuit; in the hydrogen internal combustion engine, green hydrogen is mixed with air and burned to release heat energy, which is converted into mechanical energy by a heat engine and drives a generator to output electric energy. Specifically, the hydrogen energy storage unit can include a proton exchange membrane fuel cell system (PEMFC), which includes a membrane electrode assembly, a bipolar plate and a gas supply system, and can realize high electric energy conversion efficiency; in the hydrogen internal combustion engine mode, a high-pressure hydrogen injection supply system and a high-efficiency cooling system can be used to ensure stable combustion process and improve overall energy efficiency. During the operation of the hydrogen energy storage unit, high-temperature heat energy discharged from the fuel cell or internal combustion engine can be collected by a waste heat recovery device and delivered to the park heat load end to replace part of the electric heating mode. Through the hydrogen energy storage unit, the park can quickly obtain supplemental green electricity when the load gap occurs, and at the same time, the waste heat can be used to supply heat energy, thereby enhancing the flexibility and comprehensive energy efficiency of the overall system.

[0049] The electrochemical energy storage unit can be charged when there is more green electricity than needed and discharged when there is less green electricity than needed, which can realize the transfer of electric energy in time and ensure that the load energy consumption module can stably obtain electric energy; the green hydrogen preparation unit can use the excess green electricity to produce green hydrogen and green oxygen, and collect and store them, which can effectively absorb the excess green electricity and avoid the phenomenon of abandoned wind and light, and the generated green hydrogen can also be combined with the green carbon dioxide generated by the biomass power generation unit in the green electricity generation module to synthesize green methanol, realize carbon cycle, and provide various energy categories for the industrial park; the hydrogen energy storage unit can convert the stored green hydrogen into green electricity, and recover the heat energy generated in the conversion process, which can provide additional electric energy compensation when there is a lack of electricity, and at the same time realize the recovery and utilization of waste heat, further improve the energy utilization rate and the comprehensive efficiency of the system.

[0050] Optionally, the green hydrogen production unit 122 can include at least one of an alkaline water electrolysis hydrogen production device and a proton exchange membrane water electrolysis hydrogen production device. Among them, the alkaline water electrolysis hydrogen production device can use an alkaline aqueous solution containing potassium hydroxide or sodium hydroxide as an electrolyte as a conductive medium, and realize water molecule electrolysis to generate green hydrogen and green oxygen by applying an external electric field at both poles. When green electricity is input into the electrolytic cell, water molecules obtain electrons on the cathode surface to generate green hydrogen, and lose electrons on the anode surface to generate green oxygen, thereby realizing the conversion of electrical energy into chemical energy. The alkaline water electrolysis hydrogen production device can include an electrolytic cell body, an anode, a cathode, an electrolyte circulation system, and a gas-liquid separator. The electrode is usually made of nickel-based alloy material to improve the catalytic activity and corrosion resistance, and the diaphragm is made of porous inorganic material to reduce gas cross. The alkaline water electrolysis hydrogen production device can also be equipped with a cooling system to maintain the appropriate working temperature during operation, and the product green hydrogen and green oxygen are purified through a gas purification unit. Through the alkaline water electrolysis hydrogen production device, green electricity can realize large-scale production of green hydrogen at a lower cost, which is suitable for the continuous operation environment of the industrial park.

[0051] The proton exchange membrane water electrolysis hydrogen production device can use a proton exchange membrane as a solid electrolyte to realize the production of high-purity green hydrogen at high current density. When green electricity is applied to the membrane electrode assembly, water molecules at the anode are catalytically decomposed into green oxygen, protons and electrons, and protons migrate to the cathode through the proton exchange membrane under the action of the electric field, and combine with electrons to generate green hydrogen. The proton exchange membrane water electrolysis hydrogen production device can include a membrane electrode assembly, a bipolar plate, a gas diffusion layer, and a sealing structure. The membrane electrode assembly usually uses a perfluorosulfonic acid membrane as a proton conductor, and platinum-based or iridium-based catalysts are coated on both sides to promote the reaction. The bipolar plate is used to distribute the gas and current, and provides structural support. The gas diffusion layer ensures uniform distribution of the reaction gas, improving electrode utilization. The PEM water electrolysis hydrogen production device can operate at high current density, and the purity of the product green hydrogen can reach more than 99.999%, and the green hydrogen can be directly output at high pressure, reducing the subsequent compression energy consumption. Through the proton exchange membrane water electrolysis hydrogen production device, green electricity can be efficiently converted into high-purity green hydrogen to meet the demand for high-quality energy in the industrial park.

[0052] By using at least one of the alkaline water electrolysis hydrogen production device and the proton exchange membrane water electrolysis hydrogen production device, the hydrogen production process can be flexibly selected according to different application scenarios, which can not only ensure the efficiency and purity of hydrogen production, but also improve the adaptability and flexibility of green electricity consumption, and enhance the scalability of the energy system in the industrial park.

[0053] In an optional embodiment, the green hydrogen production unit 122 can store the green oxygen produced in the hydrogen production process after purification and compression, and deliver it to the load energy module and the green electricity generation module through pipelines or skid-mounted vehicles, to serve as the supply source of the oxygen load of the industrial park and the supply source of the green methanol synthesized by the green electricity generation module. In the process of driving water electrolysis with renewable energy by the green hydrogen production unit, an equal amount of by-product green oxygen is generated in addition to green hydrogen. The by-product green oxygen in its untreated state usually contains water vapor, a small amount of green hydrogen, and other impurities. Direct discharge not only causes resource waste but also may pose a safety hazard. By storing the by-product green oxygen after purification and compression, and delivering it to the load energy module and the green electricity generation module through pipelines or skid-mounted vehicles, to serve as the supply source of the oxygen load of the industrial park and the supply source of the green methanol synthesized by the green electricity generation module, efficient utilization of the by-product green oxygen and carbon cycle of the system are achieved, and comprehensive optimization of the park energy system is realized.

[0054] The purification of green oxygen refers to the process of removing impurities and increasing the concentration of the by-product green oxygen produced in the green hydrogen production unit. The purification of green oxygen can use techniques such as condensation, adsorption, and separation to remove unwanted components such as water vapor, green hydrogen residue, and nitrogen. For example, the purification of green oxygen can use a condensation separation device to condense water vapor in green oxygen into droplets and discharge it, and a molecular sieve adsorption device to selectively adsorb and remove nitrogen or argon. A membrane separation device can also be used to separate green oxygen and green hydrogen efficiently by taking advantage of the higher permeability of polymer membranes to green hydrogen. After purification, the purity of green oxygen can be increased to more than 95%, meeting the application requirements of industrial parks such as smelting, combustion, and wastewater aeration.

[0055] Green oxygen compression refers to the process of pressurizing purified green oxygen by a compressor to facilitate storage and subsequent delivery. For example, the compressor can be a piston compressor, a diaphragm compressor, or a scroll compressor, each with different structures suitable for different scales and purity requirements. Piston compressors are suitable for large-scale continuous oxygen supply scenarios. Diaphragm compressors are suitable for high-purity green oxygen pressurization requirements because the gas does not come into contact with lubricating oil. Scroll compressors are suitable for small and medium-sized applications due to their low noise and vibration. The pressure of compressed green oxygen is usually between 0.2 MPa and 2.0 MPa to facilitate entry into a gas storage container or a delivery pipe network.

[0056] Green oxygen storage refers to the storage of compressed green oxygen in fixed or mobile storage tanks to facilitate adjustment during load fluctuations or uneven demand. For example, gas storage devices can include high-pressure cylinder groups, spherical storage tanks, or low-temperature liquid oxygen storage tanks. High-pressure cylinder groups are suitable for short-term or dispersed gas supply scenarios. Spherical storage tanks are suitable for large-scale centralized gas storage. Liquid oxygen storage tanks can achieve high-density storage by cooling green oxygen to a low temperature, significantly reducing the volume and extending the storage period.

[0057] Green oxygen delivery can be implemented by fixed pipeline delivery and skid-mounted vehicle mobile delivery. The fixed pipeline delivery can connect the gas storage device and each gas terminal in the park through the pipeline network, which is suitable for scenarios with concentrated green oxygen load distribution and stable oxygen consumption. The pipeline is usually made of corrosion-resistant stainless steel, and check valves, pressure regulating valves and flow meters are equipped at key positions to ensure safety and accurate distribution. The skid-mounted vehicle delivery method can transport high-pressure steel cylinders or liquid oxygen tanks on a mobile platform to different gas consumption points in the park through vehicles, which is suitable for scenarios with dispersed gas consumption demand or without fixed pipeline installation.

[0058] By purifying and compressing the green oxygen generated in the green hydrogen production unit during hydrogen production and delivering it to the load energy module through pipelines or skid-mounted vehicles, the by-product green oxygen can be converted into valuable green oxygen resources, meeting the production demand of green oxygen in the industrial park, reducing the cost of external green oxygen procurement, and realizing the recycling of energy and materials.

[0059] In an optional embodiment, the hydrogen energy storage unit uses a hydrogen fuel cell or a hydrogen internal combustion engine as an energy conversion device to collect the waste heat energy generated during the conversion process while converting green hydrogen into green electricity, and supplies the waste heat energy to the heat load of the park when the waste heat energy utilization cost is lower than the electric heating cost of the load energy module.

[0060] The hydrogen fuel cell can directly convert green hydrogen and green oxygen in the air into electricity through an electrochemical reaction. The hydrogen fuel cell can include an anode, a cathode and a proton exchange membrane. Green hydrogen is decomposed into protons and electrons at the anode, protons migrate to the cathode through the proton exchange membrane, and electrons form an electric current output through an external circuit, and finally combine with green oxygen to generate water at the cathode. In this process, in addition to generating electricity, a large amount of low-temperature waste heat energy is released, usually in the temperature range of 60°C to 90°C. To effectively collect the waste heat, a water-cooled or air-cooled cooling circuit can be arranged around the fuel cell stack. The water-cooled method absorbs the heat generated by the battery reaction through the cooling water pipeline to form hot water, and the air-cooled method uses a heat exchanger to transfer heat to air or secondary medium. Different cooling methods can be flexibly selected according to the type and size of the park heat load, for example, in the scenario requiring central heating, water cooling is used and connected to the regional heating network, and in the scenario requiring local air heating, air cooling is used in combination with a hot air blower to achieve direct utilization.

[0061] The hydrogen internal combustion engine can mix green hydrogen with air through a mechanical process and combust in the cylinder to drive the movement of the piston to produce mechanical work, which is converted into electrical energy through a generator. The hydrogen internal combustion engine has the characteristics of no carbon emission and fast response in the combustion process, but the combustion temperature is relatively high, usually between 180 and 400°C, and a large amount of high-temperature waste heat is contained in the exhaust gas. In order to realize efficient utilization of this part of waste heat energy, a waste heat recovery device can be arranged in the exhaust pipe of the hydrogen internal combustion engine, such as a flue gas heat exchanger, a water-cooled waste heat boiler or an Organic Rankine Cycle (ORC) device, to convert high-temperature waste gas heat energy into hot water, steam or low-grade electrical energy. Specifically, the flue gas heat exchanger can directly recover the waste gas heat for industrial hot water supply, the waste heat boiler can generate steam and be connected to the park steam load system, and the ORC device can drive a turbine through working medium evaporation to realize secondary power generation, thereby meeting the heat load while further improving the overall energy efficiency.

[0062] In some optional embodiments, the hydrogen energy storage unit can also be configured with a waste heat collection and distribution control function for monitoring waste heat output power, temperature level and park heat load demand. When the waste heat energy utilization cost is lower than the cost of electric heating mode used by the load energy module, the system automatically switches to waste heat supply mode, at which time the waste heat energy generated by the hydrogen fuel cell or the hydrogen internal combustion engine is preferentially used to meet the park heat load demand, thereby reducing electric heating consumption and reducing the overall energy consumption of the park. Cost comparison can be realized by introducing a thermoelectric equivalent model, which specifically means that the waste heat recovery cost and the electric heating energy consumption cost are compared in real time, and if the unit energy price of waste heat utilization is lower, the waste heat is guided to the park heating system through valve control, heat exchanger switching and hot water pipeline adjustment.

[0063] By using a hydrogen fuel cell or a hydrogen internal combustion engine as an energy conversion device in the hydrogen energy storage unit, green hydrogen is converted into green electricity while collecting and utilizing waste heat energy, and under the condition that the waste heat energy utilization cost is lower than the electric heating cost, the park heat load is supplied, which can realize the collaborative output of electrical energy and thermal energy, improve the comprehensive energy utilization efficiency of the system, and thus reduce the operating cost of the park.

[0064] In an example embodiment of the present disclosure, continuing to refer to Figure 2 As shown in the figure, the green electricity delivery module 130 can include a booster station unit 131, a power delivery unit 132 and an energy product delivery unit 133, wherein: The booster station unit 131 can be used to select a corresponding voltage level boosting configuration according to the installed capacity of the green electricity generation module and the green electricity storage module, and to boost the voltage level of the green electricity to be delivered through the boosting configuration. The booster station unit 131 can determine the corresponding voltage level configuration according to the installed capacity of the green electricity generation module and the capacity of the green electricity storage module. For example, when the installed capacity is in the order of megawatts, a 10 kilovolt or 35 kilovolt level boosting configuration can be selected; when the installed capacity is in the order of tens of megawatts to hundreds of megawatts, a 110 kilovolt or even 220 kilovolt level boosting configuration can be used.

[0065] In some optional embodiments, the booster station unit 131 can include a booster transformer, a high-voltage switching device, and a protection and control system. The booster transformer is used to boost the green electricity at a low voltage level to a predetermined transmission voltage level. The high-voltage switching device is used to realize the switching operation and fault removal during power transmission. The protection and control system is used to monitor the power transmission state and perform automatic protection actions in abnormal situations. In specific implementations, the booster transformer can be an oil-immersed transformer or a dry-type transformer. The former is suitable for large-capacity long-time continuous operation scenarios, and the latter is suitable for places with high environmental requirements or limited space. Through the configuration of the booster station unit, the green electricity can have a suitable voltage level before transmission, thereby reducing line loss and improving transmission efficiency while meeting the needs of different scales of the park.

[0066] The power transmission unit 132 can be connected to the booster station unit and used to transmit the green electricity with a boosted voltage level to the load energy module through a dedicated power transmission line independent of the power grid after receiving the output of the booster station unit, so as to ensure that the industrial park is preferentially supplied with green electricity. The dedicated power transmission line is a power supply line specially designed for the park, which avoids conflicts with the scheduling and distribution of the public power grid and ensures that the load energy module of the park can preferentially obtain directly supplied green electricity.

[0067] In some optional embodiments, the power sending unit 132 can include a dedicated power transmission line, a line protection device, a monitoring unit, and a power distribution terminal. The dedicated power transmission line can adopt an overhead line or a cable line. The overhead line is suitable for a case where the distance between the park and the power supply point is long and the line environment allows. The cable line is suitable for a case where the urban park or the underground pipe gallery condition is met. The line protection device is used to quickly remove the fault section when an overload, short circuit, or ground fault occurs, so as to ensure the safety and stability of the transmission system. The monitoring unit can realize real-time monitoring of the state of the transmitted electric energy through the voltage sensor and the current sensor installed on the power dedicated line, and link with the energy management system of the park through the communication module. The power distribution terminal can be arranged at the entrance of the load energy module, and is used to distribute and schedule the electric energy transmitted by the power dedicated line according to the load characteristics. Through the above configuration, the power sending unit can ensure that the park still obtains stable and preferential green electric energy direct supply when the public power grid supply is insufficient or fluctuates greatly, and improves the cleanliness and independence of energy utilization of the park.

[0068] The energy product transmission unit 133 can be used to transmit cold energy, heat energy, hydrogen, oxygen, green methanol, and other energy or products to the load energy module. Specifically, the energy product transmission unit 133 can include a pipeline transmission subunit and a skid car transmission subunit. The pipeline transmission subunit adopts a pipeline transmission mode and is suitable for the centralized transmission of electric energy, cold energy, heat energy, hydrogen, oxygen, and green methanol within the park. The skid car transmission subunit adopts a skid vehicle transmission mode and is suitable for the flexible transportation of hydrogen, oxygen, and green methanol and other energy or chemical products between different areas of the park or to external users. By setting the energy product transmission subunit, the full-link direct supply path of electric energy, cold energy, heat energy, gas, liquid energy, and raw materials can be opened, so that the industrial park realizes the collaborative distribution of electric energy and multiple energy products.

[0069] By selecting the voltage level and performing voltage boosting according to the installed capacity through the booster station unit in the green electric energy transmission module, the stability and efficiency of the transmission line can be ensured. By supplying power to the load energy module through the dedicated power transmission line of the power sending unit independent of the power grid, the industrial park can obtain preferential direct supply of green electric energy, effectively avoid scheduling conflicts with external power grids, and enhance the autonomy and independence of internal energy utilization. At the same time, by pipeline transmission or skid vehicle transmission of cold energy, heat energy, hydrogen, oxygen, green methanol, and other energy or products through the energy product transmission subunit, not only can multiple energy be collaboratively distributed within the park, but also can flexibly meet the needs of distributed energy points or external users, thereby improving the overall energy utilization efficiency and comprehensive protection capability of the park.

[0070] In an optional embodiment, the access section of the power transmission unit can be connected to the output of the step-up line of the step-up station unit, and the output section of the power transmission unit is connected to the variable step-up station of the load energy consumption module, so that the voltage level of the green electricity energy adjusted by the variable step-up station meets the voltage level requirement of each electrical equipment in the load energy consumption module.

[0071] The access section refers to the input interface part of the power transmission unit for realizing physical and electrical connection with the previous voltage lifting link, and its function is to introduce the high voltage level green electricity energy output by the step-up station unit into the power transmission channel. The access section can include high-voltage cables, switch cabinets, disconnectors, circuit breakers and other equipment. The high-voltage cables are used to realize the physical conduction of long-distance transmission, the switch cabinets and disconnectors are used to switch the power flow and isolate the fault line under different operating conditions, and the circuit breakers are used to automatically cut off the circuit when the power system is abnormal or overloaded, so as to avoid the expansion of the fault. In a specific implementation manner, the electrical equipment of the access section needs to meet the insulation level and current carrying capacity of the output voltage level of the step-up station unit. For example, when the output voltage of the step-up station unit is 35 kilovolts, the access section should be equipped with corresponding 35 kilovolt high-voltage cables and supporting switch equipment to ensure the safety and reliability of the power transmission process. The access section can also be provided with voltage transformers and current transformers for real-time collection of voltage and current parameters of green electricity energy, and uploading to the park energy management platform through the monitoring system, so as to realize real-time monitoring and remote control of the power transmission link.

[0072] The output section refers to the interface part of the power transmission unit for leading out the high voltage level green electricity energy transmitted and sending it to the internal energy consumption link of the park, and its function is to realize the physical connection between the green electricity energy after long-distance or cross-region transmission and the voltage adaptation equipment in the load energy consumption module. The output section can include an outgoing line switch cabinet, a line protection device, a terminal cable and a line monitoring device. The outgoing line switch cabinet is used to control the shunt and transmission of green electricity energy, the line protection device such as microcomputer protection relay is used for rapid detection and cutting off of short circuit, overload and ground fault, and the terminal cable is responsible for completing the electrical connection with the internal variable step-up station of the park. In order to improve the stability of operation, the output section can also be configured with a fault arc suppression device and a lightning arrester, so as to protect the park power facilities under external interference such as lightning and operating overvoltage.

[0073] The function of the variable voltage station is to perform secondary conversion on the received high-voltage green electricity to make the voltage level meet the operation requirements of various electrical equipment in the load energy module. The variable voltage station can include a main transformer, a high-low voltage power distribution device, a reactive power compensation device, and a power quality regulation device. The main transformer is used to reduce the high-voltage power to a medium or low voltage level to match the voltage level of different energy units in the park. The high-low voltage power distribution device is used to distribute power among multiple loops to ensure that each electrical equipment operates in an independent and stable loop. The reactive power compensation device, such as a capacitor bank or a static var generator (SVG), is used to improve the power factor and voltage stability. The power quality regulation device, such as an active power filter, is used to eliminate harmonics and ensure the normal operation of sensitive load devices. In specific applications, if the load energy module includes high-power motor drive equipment, the variable voltage station needs to provide a 10-kilovolt power supply. If it includes precision electronic equipment, the voltage level needs to be further reduced to 380 volts or 220 volts to meet the fine energy demand. Alternative implementations include building an intelligent power transformation unit in the variable voltage station, using a digital protection and monitoring system to realize real-time monitoring and automatic adjustment of the voltage, current, and power quality on the load side.

[0074] The access section of the power transmission unit is connected to the voltage boosting line outlet of the voltage boosting station unit, and the output section is connected to the variable voltage station of the load energy module. This allows the green electricity energy adjusted by the variable voltage station to match the voltage level requirements of various electrical equipment in the load energy module, thereby ensuring the stable operation of different equipment and improving the safety and reliability of overall power supply in the park.

[0075] In an example embodiment of the present disclosure, the load energy module can include electrical load, cold load, heat load, hydrogen load, oxygen load, and alcohol load. The load energy module is used to receive green electricity, green hydrogen, green oxygen, waste heat, and green methanol according to the production and operation conditions of the industrial park, forming a variety of energy collaborative utilization modes.

[0076] The electrical load refers to various electrical equipment in the industrial park, which can include motor drive systems, control systems, electric heating devices, and numerical control machine tools. The electrical load directly relies on green electricity as the operating power and realizes mechanical drive, automatic control, or electric heating conversion through power conversion. In specific implementation details, the electrical load can be connected to the output section of the power transmission unit through a transformer and a power distribution cabinet to receive green electricity adjusted by the variable voltage station and distribute it according to the rated voltage and power requirements of different electrical equipment.

[0077] Cold load refers to the demand for cold energy in the aspects of refrigeration, air conditioning and low-temperature storage in the industrial park. The cold load can be driven by green electricity electric refrigeration device, or by the waste cold resources after the energy conversion of green hydrogen. In terms of specific implementation details, the cold load can be realized by electric-driven refrigeration compressor unit, or the cold energy released in the liquid green hydrogen process can be recycled and delivered to the cold area through a cold energy distribution network.

[0078] Heat load refers to the demand for heat energy in the production process and living facilities of the industrial park. The heat load can be provided with stable heat source by waste heat energy, green hydrogen combustion heat energy or electric boiler heating. In terms of specific implementation details, the heat load can realize waste heat recovery and heat energy supply through steam boiler, hot water boiler or heat exchanger. For example, a large amount of waste heat generated in the electrolysis process of green hydrogen preparation unit can be captured by a circulating cooling system and delivered to the heat load unit through a heat exchange pipeline for production heating or office heating. Of course, the heat load can also be directly converted into heat energy by electric heating device using green electricity, or the waste heat recovery of hydrogen fuel cell can be used for heating.

[0079] Hydrogen load refers to the use of green hydrogen energy in the production or transportation of the industrial park. The hydrogen load can supply the green hydrogen output by the green hydrogen preparation unit as fuel or chemical raw material after storage and pressure regulation. Specifically, the hydrogen load can include hydrogen refueling station of hydrogen fuel cell vehicles in the park, direct feeding of green hydrogen in chemical production, and green hydrogen supply network used as reducing agent in metallurgical or electronic industry. Of course, green hydrogen can also be directly heated or powered by green hydrogen combustion device as part of the combined heat and power system.

[0080] Oxygen load refers to the demand for green oxygen in the industries of metallurgy, chemical industry, medicine and environmental protection in the industrial park. The oxygen load can utilize the by-product green oxygen generated in the process of green hydrogen preparation unit, and deliver it after purification and compression. Specifically, the oxygen load can be directly delivered to the high-oxygen-consuming smelting furnace or chemical reaction device by fixed pipeline, or delivered by mobile skid-mounted vehicle for distributed green oxygen demand points in the park. Of course, small oxygen storage tanks can also be set up for green oxygen guarantee of medical institutions in the park, or green oxygen can be used in the aeration process of sewage treatment to enhance the degradation efficiency of pollutants.

[0081] The alcohol load refers to the demand for green methanol in the industrial park in the aspects of chemical production, fuel substitution, and basic raw material supply, etc. The alcohol load can be met by green methanol obtained through the reaction of carbon dioxide generated in the combustion or gasification process of the biomass power generation unit and hydrogen generated by the green hydrogen preparation unit. The green methanol can be used as a green source for synthesizing chemical products such as acetic acid, formaldehyde, and olefins in the downstream of the chemical park, and for supplying basic chemical raw materials. At the same time, the green methanol can also be directly used as fuel for boiler combustion or internal combustion engine, replacing traditional fossil fuels to reduce carbon emissions. In the aspect of park transportation energy, the green methanol can be applied to park special vehicles or hybrid systems to form a green transportation energy system. In terms of transportation mode, the green methanol can be centrally transported in the park through a fixed pipe network, or flexibly transported through a skid-mounted vehicle to meet the demand of distributed process links. By introducing the alcohol load, the industrial park can realize the circular coupling of electricity-hydrogen-carbon at the energy and raw material level, and provide a foundation for the green production chain.

[0082] By covering the electricity load, cold load, heat load, hydrogen load, and oxygen load in the load energy consumption module, and being able to receive green electricity, green hydrogen, green oxygen, and waste heat, the multi-energy collaborative supply and comprehensive utilization of electricity, cold energy, heat energy, hydrogen energy, and green oxygen can be realized, a coupling mode of multiple energies is formed, the comprehensive efficiency of energy utilization is effectively improved, the overall energy consumption and operating cost of the park are reduced, and clean, stable, and diversified energy support is provided for the industrial park.

[0083] It should be noted that although several modules or units of the industrial park green electricity direct supply system are mentioned in the foregoing detailed description, such division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided into several modules or units.

[0084] In addition, an industrial park green electricity direct supply method is also provided in the embodiments of the present disclosure, which can be executed by the industrial park green electricity direct supply system in the foregoing embodiments, and with reference to Figure 3 , the method comprises: Step S310: converting the wind energy and solar energy received by the green electricity generation module to generate green electricity, and determining the distribution path of the green electricity according to the real-time load demand of the industrial park; Step S320: when the output of the green electricity is higher than the real-time load demand of the load energy consumption module, inputting the surplus green electricity to the green electricity energy storage module for storage; when the output of the green electricity is lower than the real-time load demand, releasing the stored green electricity from the green electricity energy storage module; Step S330, receiving green electricity energy supplied by the green electricity generation module and green electricity energy released by the green electricity storage module through the green electricity transmission module, performing voltage level promotion on the received green electricity energy, and supplying the promoted green electricity energy to the load energy module through a dedicated power transmission line independent of the power grid; Step S340, when the load energy module receives the green electricity energy transmitted by the green electricity transmission module, dispatching the green electricity energy to corresponding electrical load, thermal load, cold load, hydrogen load, oxygen load and alcohol load according to the production and operation conditions of the park.

[0085] The specific details of each step in the above-mentioned industrial park green electricity direct supply method have been described in detail in the corresponding industrial park green electricity direct supply system, so this place will not be repeated.

[0086] It should be noted that although the steps of the method in the present disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in this specific order, or that all the steps shown must be performed to achieve the desired result. In addition or alternatively, some steps can be omitted, multiple steps can be combined into one step, and / or one step can be divided into multiple steps, etc.

[0087] In addition, the above-mentioned drawings are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present disclosure, and are not for limiting purposes. It is easy to understand that the processes shown in the above-mentioned drawings do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be executed synchronously or asynchronously, for example, in multiple modules.

[0088] Through the above description of the embodiments, those skilled in the art can easily understand that the example embodiments described herein can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solutions according to the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a U disk, a mobile hard disk, etc.) or a network, and includes a plurality of instructions to make a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) execute the method according to the embodiments of the present disclosure.

[0089] Those skilled in the art will readily conceive other embodiments of the present disclosure upon considering the specification and practicing the invention disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or conventional techniques in the art that are not disclosed by the present disclosure. The specification and examples are only considered as exemplary, and the true scope and spirit of the present disclosure are indicated by the claims.

[0090] It should be understood that the present disclosure is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those of ordinary skill in the art without departing from the scope of this disclosure. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An industrial park green electricity direct supply system, characterized in that, The method comprises the following steps: A green electricity generation module is used to convert received wind energy and solar energy into green electricity energy, and the green electricity energy is distributed according to the real-time load demand of the industrial park; A green electricity storage module is connected with the green electricity generation module, and is used to store the green electricity energy when the output of the green electricity generation module is higher than the real-time load demand of the load energy module, and release the stored green electricity energy when the output of the green electricity generation module is lower than the real-time load demand; A green electricity transmission module is connected with the green electricity generation module and the green electricity storage module, and is used to receive the green electricity energy directly supplied by the green electricity generation module and the green electricity energy released by the green electricity storage module, and to improve the voltage level of the received green electricity energy, and to supply power to the load energy module through a dedicated power transmission line independent of the power grid; A load energy module is connected with the green electricity transmission module, and is used to receive the green electricity energy transmitted by the green electricity transmission module, and to schedule different types of loads according to the production operation conditions of the industrial park.

2. The system of claim 1, wherein, The green electricity generation module comprises: A wind power generation unit is used to convert received wind energy into green electricity energy through a wind power generation assembly; A photovoltaic power generation unit is used to convert received solar energy into green electricity energy through a photovoltaic assembly; A photo-thermal power generation unit is used to convert received solar energy into green electricity energy through a heat collection assembly, and to supply steam after partial power generation to the thermal load of the industrial park; A biomass power generation unit is used to convert heat energy generated by burning or gasifying biomass raw materials into green electricity energy, and to synthesize green methanol by combining green hydrogen and green carbon dioxide as by-products, and to supply the green alcohol load of the industrial park; The wind power generation unit, the photovoltaic power generation unit, the photo-thermal power generation unit and the biomass power generation unit are connected in parallel to the green electricity storage module to realize stable output power based on complementary characteristics.

3. The system of claim 1, wherein, The green electricity storage module comprises: An electrochemical energy storage unit is used to charge when the output of the green electricity generation module is higher than the real-time load demand of the industrial park, and to discharge when the output of the green electricity energy is lower than the real-time load demand; A green hydrogen preparation unit is used to prepare green hydrogen and green oxygen by using excess green electricity energy when the output of the green electricity generation module is higher than the real-time load demand of the industrial park, to collect and store the prepared green hydrogen and green oxygen, and to use part of the green hydrogen as input of the green electricity generation module to synthesize green methanol; A hydrogen energy storage unit is connected with the green hydrogen preparation unit, and is used to convert the green hydrogen into electricity when there is a power shortage in the industrial park, and to recover the heat energy in the conversion process for use in the park.

4. The system of claim 3, wherein, The green hydrogen preparation unit comprises at least one of an alkaline water electrolysis hydrogen production device and a proton exchange membrane water electrolysis hydrogen production device.

5. The system of claim 4, wherein, The green hydrogen production unit stores the green oxygen generated in the hydrogen production process after purification and compression, and transports it to the load energy module and the green electricity generation module through pipelines or skid-mounted vehicles, to serve as the supply source of the oxygen load of the industrial park and the supply source of the synthesized green methanol of the green electricity generation module.

6. The system of claim 3, wherein, The hydrogen energy storage unit uses a hydrogen fuel cell or a hydrogen internal combustion engine as an energy conversion device to collect the waste heat energy generated during the conversion of green hydrogen into green electricity while converting the green hydrogen into green electricity, and supplies the waste heat energy to the heat load of the park when the utilization cost of the waste heat energy is lower than the electric heating cost of the load energy module.

7. The system of claim 1, wherein, The green electricity transmission module includes: A booster station unit for selecting a corresponding voltage level booster configuration according to the installed capacity of the green electricity generation module and the green electricity storage module, and raising the voltage level of the green electricity to be transmitted through the booster configuration; A power transmission unit connected to the booster station unit for transmitting the green electricity with raised voltage level to the load energy module through a dedicated power transmission line independent of the power grid after receiving the output of the booster station unit, to ensure that the industrial park is preferentially supplied with green electricity.

8. The system of claim 7, wherein, The access section of the power transmission unit is connected to the output of the booster line of the booster station unit, and the output section of the power transmission unit is connected to the variable booster station of the load energy module, so that the voltage level of the green electricity adjusted by the variable booster station meets the voltage level requirements of each electrical equipment in the load energy module.

9. The system of claim 1, wherein, The load energy module includes electrical load, cold load, heat load, hydrogen load, oxygen load and alcohol load, and is used to receive green electricity, green hydrogen, green oxygen, waste heat energy and green methanol according to the production operation conditions of the industrial park, to form a variety of energy collaborative utilization modes.

10. An industrial park green electricity direct supply method, characterized in that, The industrial park green electricity direct supply system of any one of claims 1-9 is executed, and the method comprises: Converting the wind energy and solar energy received by the green electricity generation module into green electricity, and determining the distribution path of the green electricity according to the real-time load demand of the industrial park; When the output of the green electricity is higher than the real-time load demand of the load energy module, the excess green electricity is input into the green electricity storage module for storage; when the output of the green electricity is lower than the real-time load demand, the stored green electricity is released from the green electricity storage module; Receiving the green electricity directly supplied by the green electricity generation module and the green electricity released by the green electricity storage module through the green electricity transmission module, raising the voltage level of the received green electricity, and supplying power to the load energy module through a dedicated power transmission line independent of the power grid; When the load energy module receives the green electricity transmitted by the green electricity transmission module, the green electricity is dispatched to the corresponding electrical load, heat load, cold load, hydrogen load, oxygen load and alcohol load according to the production operation conditions of the park.

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