CN109268134B

CN109268134B - Distributed energy station and control method thereof

Info

Publication number: CN109268134B
Application number: CN201811173814.XA
Authority: CN
Inventors: 张超; 徐家彬; 林凯; 郑阳; 王丹阳
Original assignee: Beijing Elion Smart Energy Technology Co ltd; Elion Resources Group Co Ltd
Current assignee: Beijing Elion Smart Energy Technology Co ltd; Elion Resources Group Co Ltd
Priority date: 2018-10-09
Filing date: 2018-10-09
Publication date: 2023-09-29
Anticipated expiration: 2038-10-09
Also published as: CN109268134A

Abstract

The present disclosure relates to a distributed energy station and a control method thereof. The distributed energy station includes: the power generation device is used for converting energy media from the corresponding micro energy network into electric power and waste heat, returning the converted electric power to the corresponding micro energy network and conveying the converted waste heat to the waste heat recovery device, wherein the power generation device comprises a fuel cell, and the fuel cell is used for converting hydrogen from the corresponding micro energy network into electric power; a waste heat recovery device; the cold and hot water conversion device comprises a distributed energy station, a plurality of device controllers, a plurality of device agent modules and a distributed energy station agent module, wherein the device controllers are connected with a plurality of devices in the distributed energy station in a one-to-one correspondence manner, the device agent modules are connected with the device controllers in a one-to-one correspondence manner, and the distributed energy station agent modules are connected with the device agent modules. Thus, hydrogen in the micro energy network can be converted into electric power, and the reasonable utilization of energy sources is promoted by the diversification of the energy sources.

Description

Distributed energy station and control method thereof

Technical Field

The present disclosure relates to the field of energy systems, information systems, and control systems, and in particular, to a distributed energy station and a control method thereof.

Background

The conventional energy technology is mostly in a centralized and large-scale supply mode, such as a thermal power plant, regional central heating, a small-sized centralized cooling and distributed cooling technology and other split-production systems. The centralized energy supply is usually in a 'one-plant one-station one-energy' mode, so that centralized management is facilitated, but the centralized energy supply is far away from a user end, loss of energy transmission is large, and the centralized energy supply is single, so that safety and reliability cannot be guaranteed.

Distributed, miniaturized energy production and supply approaches have emerged in recent years. The distributed energy station is generally built in an energy load center, the energy cascade utilization principle is applied, power is firstly generated, high-quality electric energy is obtained, waste heat is used for supplying heat and cooling, heat transmission loss and heat supply network cost are reduced, and the comprehensive utilization efficiency and benefit of primary energy are greatly improved. However, the existing distributed energy station has a smaller energy supply radius, so that the energy station cannot meet all energy requirements.

The distributed energy stations in the energy internet system can convert energy from the corresponding micro energy network into cold and hot water or electric power required by users in the corresponding micro energy network through energy conversion and return to the corresponding micro energy network, and the cold and hot water or electric power is supplied to end users through the micro energy network. The existing distributed energy station has a single energy conversion form.

Disclosure of Invention

The purpose of the present disclosure is to provide an energy-saving and efficient distributed energy station and a control method thereof.

To achieve the above objects, the present disclosure provides a distributed energy station. The distributed energy station includes: a power generation device for converting energy medium from the corresponding micro energy grid into electricity and waste heat, returning the converted electricity to the corresponding micro energy grid, and delivering the converted waste heat to a waste heat recovery device, wherein the power generation device comprises one or more of a fuel cell for converting hydrogen from the corresponding micro energy grid into electricity and flue gas, an internal combustion engine for converting gas from the corresponding micro energy grid into electricity, flue gas and cylinder liner water waste heat, a gas turbine for converting gas from the corresponding micro energy grid into electricity and flue gas, and a micro gas turbine for converting gas from the corresponding micro energy grid into electricity and flue gas; the waste heat recovery device is used for converting waste heat from the power generation device into steam, cold water or hot water and returning the steam, the cold water or the hot water to the corresponding micro energy network; the cold and hot water conversion device is used for converting an energy medium from a corresponding micro energy network into cold water or hot water and returning the cold water or hot water to the corresponding micro energy network, wherein the distributed energy station further comprises a plurality of device controllers which are connected with a plurality of devices in the distributed energy station in a one-to-one correspondence manner, a plurality of device agent modules which are connected with the plurality of device controllers in a one-to-one correspondence manner, and a distributed energy station agent module which is connected with the plurality of device agent modules.

Optionally, the fuel cell is connected with one or more of the gas turbine and the micro gas turbine, and the gas turbine and the micro gas turbine are used for converting part of heat energy in flue gas generated by the fuel cell into electric power.

Optionally, the cold and hot water converting device includes: and the smoke hot water type lithium bromide cold-warm water unit is connected with the internal combustion engine and is used for converting the waste heat of smoke and cylinder liner water output by the internal combustion engine into cold water or hot water.

Optionally, the cold and hot water converting device includes: and the waste heat boiler is connected with the gas turbine and is used for generating smoke by utilizing the smoke output by the gas turbine so as to be converted into cold water or hot water by the waste heat recovery device.

Optionally, the cold and hot water converting device includes: the waste heat boiler is connected with the micro gas turbine and is used for generating steam by utilizing the flue gas output by the micro gas turbine; and the steam type lithium bromide cold-warm water unit is connected with the waste heat boiler and is used for converting cold water or hot water by utilizing steam output by the waste heat boiler.

Optionally, the cold and hot water converting device includes: and the hot water type lithium bromide cold-warm water unit is used for converting the high-temperature hot water from the corresponding micro energy network into cold water or returning the hot water to the corresponding micro energy network.

Optionally, the cold and hot water converting device includes: the heat pump is used for converting one or more of geothermal heat, sewage waste heat and industrial waste heat into cold water or hot water and returning the cold water or the hot water to the corresponding micro energy network.

Optionally, the device controller includes: the receiving module is used for receiving the control instruction sent by the device agent module corresponding to the device controller; and the control module is connected with the receiving module and used for controlling the device corresponding to the device controller to convert and store energy according to the control instruction.

The present disclosure also provides a control method of a distributed energy station, the method comprising:

when the quantity or quality of energy production, conversion, storage and transmission in a first device is changed, a device agent module corresponding to the first device determines a first optimization target aiming at the first device, and controls the production, conversion, storage and transmission of the energy in the first device according to the first optimization target;

a device agent module corresponding to a second device associated with the first device determines a second optimization target for the second device, and controls the production, conversion, storage and transmission of energy in the second device according to the second optimization target;

And the distributed energy station agent module determines a third optimization target aiming at the distributed energy station and controls the transmission of energy among all devices in the distributed energy station according to the third optimization target.

Optionally, determining the first optimization objective includes: according to a thermal economy method, an energy balance model, a material balance model, a cost input and output balance model and a pollutant emission model of the first device, carrying out cost analysis on the first device, and determining the first optimization target according to an analysis result;

determining the second optimization objective includes: according to a thermal economy method and an energy balance model, a material balance model, a cost input and output balance model and a pollutant emission model of the second device, carrying out cost analysis on the second device, and determining the second optimization target according to an analysis result;

determining the third optimization objective includes: and according to a thermal economy method, an energy balance model, a material balance model, a cost input and output balance model and a pollutant emission model of the distributed energy station, carrying out cost analysis on the distributed energy station, and determining the third optimization target according to an analysis result.

Through the technical scheme, the distributed energy station is established, energy of a corresponding micro energy network can be converted into electric power, steam, cold water or hot water and then returned to the corresponding micro energy network, and the energy is converted and transmitted according to control instructions of the multi-agent system. The energy medium in the micro energy network can be converted into various energy sources such as electric power, steam, cold water, hot water and the like, the reliability and the stability of energy utilization are improved by a multi-energy complementary energy utilization mode, and the production of the distributed energy station can be adjusted according to an optimized operation scheme determined by a multi-agent system, so that the requirements and the supply of energy sources are matched by cooperative control of energy conversion, storage and transmission, the energy utilization efficiency is improved, and the energy cost is reduced.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

Fig. 1 is a schematic diagram of an energy internet system according to an exemplary embodiment;

FIG. 2 is a schematic diagram of an area energy station provided by an exemplary embodiment;

fig. 3 is a schematic structural diagram of a transmission and distribution network according to an exemplary embodiment;

FIG. 4 is a schematic diagram of the structure of a micro energy network provided by an exemplary embodiment;

FIG. 5a is a schematic diagram of a distributed energy station provided by an exemplary embodiment;

FIG. 5b is a schematic diagram of a distributed energy station provided by another exemplary embodiment;

FIG. 6 is a flow chart of a method of controlling an energy Internet system provided by an exemplary embodiment;

fig. 7 is a schematic diagram of a multi-agent system of an energy internet system provided by an exemplary embodiment.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

Fig. 1 is a schematic diagram of an energy internet system according to an exemplary embodiment. As shown in fig. 1, the subsystems of the energy internet system include a regional energy station, a transmission and distribution network, a plurality of micro energy networks, a plurality of distributed energy stations, and a plurality of client monitoring subsystems, each subsystem including a plurality of devices.

The regional energy station is used for producing various energy mediums by utilizing one or more of solar energy, wind energy, coal, biomass fuel, organic garbage and natural gas.

The transmission and distribution network is connected with the regional energy stations, the power grid, the natural gas pipe network and the reclaimed water pipe network and is used for transmitting, converting and storing energy media from the regional energy stations, the power grid, the natural gas pipe network and the reclaimed water pipe network.

Each micro energy network is connected with the transmission and distribution network, any two micro energy networks are connected with each other, and the micro energy networks are used for storing and converting energy media from the transmission and distribution network, the corresponding distributed energy stations and other micro energy networks and transmitting the energy media to a user end load or other micro energy networks.

The plurality of user terminal monitoring subsystems can be connected with the plurality of micro energy networks in a one-to-one correspondence manner, and each micro energy network is connected with the corresponding user terminal load through the corresponding user terminal monitoring subsystem. The user side monitoring subsystem is used for controlling the energy medium in the corresponding micro energy network to be transmitted to the corresponding user side load and monitoring the energy medium consumed by the corresponding user side load.

The distributed energy stations are correspondingly connected with the micro energy networks, and the distributed energy stations are used for converting energy media from the corresponding micro energy networks into one or more of electric power, steam, cold water and hot water and returning the energy media to the corresponding micro energy networks.

The operation of the system is controlled by a multi-agent system, and the multi-agent system comprises a plurality of agent modules which are in one-to-one correspondence with each device, each subsystem, each device in each subsystem and the energy internet system.

In the regional energy station, the local energy can be converted into the required energy to finish the conversion of the energy form, for example, the energy such as solar energy, wind energy, coal, biomass, organic garbage, natural gas and the like can be converted into energy such as electric power, steam and the like which can be transmitted remotely. Regional energy stations may be selected for construction in load centers of industrial areas where electrical or steam loads are large.

The transmission and distribution network is mainly used for remotely transmitting, converting and storing media containing various energy sources, such as natural gas, hydrogen and electric power. If the electric power is excessive in the area, the electric energy can be converted into hydrogen for storage, so that the cooperative conversion and the exchange storage among multiple energy sources are realized. The natural gas in the transmission and distribution network can also be transmitted to the regional energy station, and is converted into energy forms such as electric power, steam, hydrogen and the like in the regional energy station, and then is transmitted out by the transmission and distribution network for users in the region.

The micro energy network refers to a miniaturized, intelligent and distributed energy supply system which consists of an energy storage device, an energy conversion device, a monitoring and protecting device and the like. The distributed energy station is also a miniaturized, intelligent and distributed energy supply system which consists of an energy conversion device, a monitoring and protecting device and the like. Both the micro energy network and the distributed energy stations may be located in the area where the customer premise load is located.

In the present disclosure, the customer premise load, the distributed energy stations, and the micro energy network may be in a one-to-one correspondence (as in the embodiment of fig. 1). At least one user end load or a plurality of user end loads connected with a micro energy network can be arranged, and one or a plurality of distributed energy stations connected with the micro energy network can be arranged according to the distribution condition of the user end loads and the type and the quantity of the used energy media. Some micro-energy networks may also be configured not to connect with distributed energy stations. On the one hand, the energy transmitted by the transmission and distribution network is further converted into energy media matched with the types, grades and quantity of the loads of the user end in the micro energy network, so that the converted energy media can be directly used by the loads of the user end. On the other hand, each micro energy network can store energy, and the energy can be mutually transmitted among the micro energy networks to play roles of peak regulation and complementary standby, namely, each distributed energy station can mutually stand by, so that the energy is more reasonably utilized.

The energy and information among the micro energy networks can be interconnected and communicated, and each micro energy network can be in grid connection or off-grid operation with the transmission and distribution network. That is, the micro energy networks can circulate energy and information through the transmission and distribution network (run in parallel with the transmission and distribution network), or can directly circulate energy and information without passing through the transmission and distribution network (run out of parallel with the transmission and distribution network). For example, when the transmission and distribution network fails, the multi-agent system may respectively send control instructions to the transmission and distribution network and the micro-energy network, instruct to disconnect energy connection between the transmission and distribution network and the micro-energy network, instruct to interconnect the micro-energy networks, and directly perform energy circulation. When a certain micro-energy network fails, the multi-agent system can respectively send control instructions to the transmission and distribution network and the micro-energy network to indicate to disconnect the energy connection between the failed micro-energy network and the transmission and distribution network. Thus, the spread of faults is blocked under the condition of not affecting the peak shaving function of the energy internet. And when the micro energy network and the transmission and distribution network are in off-network operation, the micro energy networks can be mutually connected and operated in isolated network, so that the safety and reliability of energy Internet operation are improved.

The distributed energy stations are mainly used for converting energy media from corresponding micro energy networks into one or more of electric power, steam, cold water and hot water and returning the energy media to the corresponding micro energy networks. Because cold water and hot water are energy sources with larger transmission loss, a distributed energy station for converting the cold water and the hot water is established at one side of a user side load, so that the transmission loss of the energy sources can be reduced, and the reasonable utilization of the energy sources is facilitated.

The regional energy station may include an energy conversion device, an energy storage device, an energy transmission device, a plurality of device controllers, a plurality of device agent modules, and a regional energy station agent module.

The energy conversion device is used for converting one or more of solar energy, wind energy, coal, biomass fuel, organic garbage and natural gas to generate various forms of energy.

The energy storage device is connected with the energy conversion device and used for locally storing the converted energy.

The energy transmission device is respectively connected with the energy conversion device and the energy storage device and is used for transmitting the converted and stored energy to the transmission and distribution network.

The device controllers are connected with the devices in the regional energy station in a one-to-one correspondence manner, the device agent modules are connected with the device controllers in a one-to-one correspondence manner, and the regional energy station agent modules are connected with the device agent modules.

Fig. 2 is a schematic diagram of an area energy station according to an exemplary embodiment. As shown in fig. 2, the regional energy station may include a photovoltaic power generation device, a wind power generation device, a photo-thermal device, a gasification device, a hydrogen production device, a gas-steam combined cycle power generation device, a plurality of device controllers, a plurality of device agent modules, and a regional energy station agent module.

The photovoltaic power generation device is used for converting solar energy into electric power; the wind power generation device is used for converting wind energy into electric power; the photo-thermal device is used for converting solar energy into steam or electric power; the gasification device is used for converting coal, biomass fuel and organic garbage into one or more of synthesis gas, natural gas and hydrogen; the hydrogen production device is used for converting electric power or synthesis gas into hydrogen; the gas-steam combined cycle power generation device is used for converting synthesis gas, natural gas and steam into electric power and/or steam.

Regional energy stations are a comprehensive energy supply station capable of comprehensively addressing the primary energy base load demands and supplies within a region. The energy supply range of the regional energy station covers regional heating, regional power supply, regional steam supply, regional cooling and the like. The area may be an administrative city or urban area, a residential community or a building group, a development area or park, etc. Specifically, one or more regional energy stations can be built in a centralized manner according to the load requirements in the region and the advantages of locally available resources. The high-parameter energy flow medium is generated by the regional energy station and is supplied to the transmission and distribution network, then is supplied to the downstream micro energy network through the transmission and distribution network, and finally is transmitted to the end user.

The energy sources of the regional energy stations include solar energy, coal, biomass fuel, organic garbage, natural gas, wind energy and the like. In the production and conversion technology of energy sources, coal gasification treatment technology and gas-steam combined cycle technology are used as cores, solar heat collection power generation technology, biomass gasification technology, garbage power generation technology, photovoltaic power generation technology and wind power generation technology are used as assistance, synthesis gas methanation technology, hydrogen production technology and the like are combined, and various types of energy sources such as steam, electric power, high-temperature hot water, natural gas, hydrogen and the like are intensively supplied to a transmission and distribution network through equipment such as a solar heat collection device, a heat storage device, a steam generator, a coal gasification furnace, a gas turbine, a waste heat boiler, a circulating fluidized bed boiler and the like.

Fig. 3 is a schematic structural diagram of a transmission and distribution network according to an exemplary embodiment. As shown in fig. 3, the power transmission and distribution network may include an energy transmission pipeline, a first power transformation and distribution device, a first voltage regulation device, a first heat exchange device, a plurality of device controllers, a plurality of device agent modules, and a power transmission and distribution network agent module.

The energy transmission pipeline is used for transmitting natural gas, hydrogen, steam and hot water from regional energy stations; the first power transformation and distribution device is used for transforming and distributing the power from the regional energy station and/or the power transmitted by the external power grid and then transmitting the power to the micro energy network; the first pressure regulating device is used for regulating the pressure and flow of various gases output in the energy transmission pipeline and then conveying the gases to the micro energy network; the first heat exchange device is used for adjusting the pressure, the temperature and the flow of steam and/or hot water output in the energy transmission pipeline and then conveying the steam and/or hot water to the micro-energy network. The device controllers are connected with a plurality of devices in the transmission and distribution network in a one-to-one correspondence manner, the device proxy modules are connected with the device controllers in a one-to-one correspondence manner, and the transmission and distribution network proxy modules are connected with the device proxy modules.

As described above, the loads of electricity, steam, refrigeration and heating in an area are generally unevenly distributed, an area energy station is generally built in the electricity and steam load center, the load center of refrigeration and heating is generally far away, and the load of a user generally fluctuates greatly with time, which is not matched with the energy production of the area energy station. Therefore, in order to cover a larger energy supply area and simultaneously improve the conveying capacity and the regulating capacity of various energy sources, the energy flow medium needs to be remotely transmitted through a transmission and distribution network. The transmission and distribution network is used for converting high-parameter energy flow media such as electric power, natural gas, steam, high-temperature hot water and the like output by upstream and regional energy stations into medium-parameter energy flow media after pressure regulation and the like, and then transmitting the medium-parameter energy flow media to a micro energy network close to a load center. The defect of too short transmission distance of low-parameter energy flow media is avoided, and the energy regulation capability of energy sources in the transmission and distribution process is improved by means of energy storage and exchange storage.

The main body of the transmission and distribution network consists of a medium-pressure gas pipe network, a hydrogen pipe network, a steam pipe network, a hot water pipe network and a medium water pipe network, wherein the pipe networks can be independently paved, and the pipelines can be uniformly stored, planned and built in a comprehensive pipe gallery mode. The utility tunnel system is used for constructing a tunnel space underground in a city, integrates various pipelines such as municipal administration, electric power, communication, fuel gas, water supply and drainage and the like, is provided with a special access opening, a lifting opening and a monitoring system, and implements unified planning, design, construction and management so as to be beneficial to comprehensive utilization and resource sharing of the underground space. In the present disclosure, utility tunnel can hold middling pressure gas pipe network, hydrogen pipe network, steam pipe network, hot water pipe network and well water pipe network, also can hold communication, wired, tap water pipeline etc.. When adopting utility tunnel to hold these pipe networks, can reduce the work load of earth excavation, also can reduce simultaneously the adverse effect that produces municipal planning, road traffic etc..

The first power transformation and distribution device in the transmission and distribution network can take a 220kV or 110kV power grid as a backbone grid, coordinate and develop the power grids of various voltage levels, and integrate a sensing measurement technology, a communication technology, an information technology, a computer technology, a control technology and a physical power grid.

An energy storage battery can be arranged in the transmission and distribution network. The energy storage battery is connected with the first power transformation and distribution device and used for storing electric power in the first power transformation and distribution device. The energy storage battery can play roles in load adjustment, matching with new energy access, compensating line loss, power compensation, improving electric energy quality, isolated network operation, peak clipping and valley filling, stabilizing power grid fluctuation and emergency standby power supply.

The first pressure regulating device in the transmission and distribution network can regulate the pressure of the medium-pressure natural gas or hydrogen to medium-low pressure and then transmit the medium-pressure natural gas or hydrogen to the micro-energy network to directly supply distributed energy stations or end users. Specifically, the first pressure regulating device can comprise a gas pressure regulating cabinet, a gas pressure regulating box, a skid-mounted gas pressure regulating system and the like, and the pressure regulating device with the functions of wide pressure regulating range, high pressure stabilizing precision, accurate metering, automatic balance, ultrahigh and low pressure cutting, overpressure relief, double-path pressure regulating switching, remote monitoring and the like can be used.

The transmission and distribution network can also comprise a gas storage device and an electrolytic hydrogen production device.

The gas storage device is connected with the first pressure regulating device and is used for storing natural gas and hydrogen in the first pressure regulating device. The first power transformation and distribution device is connected with the gas storage device through the electrolytic hydrogen production device and is used for electrolyzing water by using the electric power output by the first power transformation and distribution device and transmitting the generated hydrogen to the gas storage device for storage.

The gas storage device can adopt high-pressure gas storage tank storage, underground gas storage, high-pressure pipeline storage, tube bundle storage, adsorption storage and the like. The gas storage device is mainly used for storing a part of natural gas or hydrogen when the supply amount of the natural gas or hydrogen is sufficient, balancing the pressure of the pipe network, and discharging the gas outwards when the supply amount of the natural gas or hydrogen is insufficient, so that the downstream gas demand is met, and the use efficiency of the pipe network is improved.

In the embodiment, the high conveying efficiency of the conveying and distributing network is ensured, meanwhile, the gas consumption requirement of the non-uniformity of the downstream end user can be met, and the supply and demand balance of the pipe network is maintained. And the electrolytic hydrogen production device can utilize solar power generation and wind power generation in regional energy stations to produce hydrogen, ensure that wind power and photovoltaic power generation can be stored in a hydrogen form in a user load low-valley period, reduce the occurrence of the phenomenon of wind and light abandoning, and provide comprehensive energy utilization rate.

The first heat exchange device in the transmission and distribution network can comprise temperature and pressure regulating equipment, an absorption heat pump and an electric drive heat pump. The temperature and pressure regulating equipment can be used for carrying out drainage, temperature reduction and pressure reduction treatment on high-temperature high-pressure steam generated by the regional energy stations, and then the steam is changed into medium-low pressure steam to be sent to the micro-energy network, so that the requirements of downstream users are met. The absorption heat pump mainly uses high-temperature hot water in a hot water pipe network as a driving heat source, extracts reclaimed water waste heat in a reclaimed water pipe network to be changed into high-temperature hot water, and transmits the high-temperature hot water to a micro-energy network; the electric drive type heat pump simultaneously takes electric power transmitted in the power distribution network and high-temperature hot water in the hot water pipe network as driving heat sources, and extracts reclaimed water waste heat in the reclaimed water pipe network to be changed into high-temperature hot water and then transmitted to the micro-energy network. The first heat exchange device realizes unified allocation of steam and hot water.

The power distribution network may also include a heat storage device. The heat storage device is connected with the first heat exchange device and is used for storing heat after heat exchange. In the embodiment, on one hand, the upstream high-temperature hot water and electric power can be used as a driving source, the waste heat in municipal reclaimed water is extracted and utilized, and the utilization ratio of clean energy and renewable energy is improved; on the other hand, as the urban natural gas transmission and distribution system and the electric power transmission and distribution system, the urban heat supply transmission and distribution system has the intermittence, periodicity and non-uniformity of the heat load, and the heat storage device can be used for intensively distributing the high-temperature hot water so as to balance the non-uniformity between the heat source and the heat load.

Fig. 4 is a schematic diagram of the structure of a micro energy net according to an exemplary embodiment. As shown in fig. 4, the micro energy network may include a second power transformation and distribution device, a second voltage regulation device, a second heat exchange device, a storage device, a plurality of device controllers, a plurality of device agent modules, and a micro energy network agent module.

The second power transformation and distribution device is used for transforming and distributing the power from the power transmission and distribution network or the corresponding distributed energy stations and then transmitting the power to the corresponding user terminals; the second pressure regulating device is used for regulating the pressure and flow of the natural gas, the hydrogen and the steam from the transmission and distribution network, regulating the pressure, the flow and the temperature of the steam from the transmission and distribution network and the corresponding distributed energy stations, and transmitting the regulated energy to the corresponding user side; the second heat exchange device is used for exchanging heat of cold water and hot water from the transmission and distribution network or the corresponding distributed energy stations and then transmitting the exchanged heat to the corresponding user side; and the storage device is used for storing the natural gas, the hydrogen, the steam, the cold water and the hot water which are output by the second pressure regulating device, the heat of the cold water and the hot water which are output by the second heat exchange device and the electric power which is output by the second power transformation and distribution device, wherein a plurality of device controllers are connected with a plurality of devices in the micro-energy network in a one-to-one correspondence manner, a plurality of device agent modules are connected with a plurality of device controllers in a one-to-one correspondence manner, and the micro-energy network agent modules are connected with a plurality of device agent modules.

The upstream of the micro energy network is connected with a transmission and distribution network, a distributed energy station and other micro energy networks, the downstream is connected with a user side load, and the power, the fuel gas, the hydrogen, the steam, the cold and hot water and the like with medium and high parameters transmitted from the upstream are converted into low-parameter power, fuel gas, hydrogen, steam, cold and hot water and the like required by an end user through a plurality of low-voltage power transformation and distribution devices, a fuel gas pressure regulating device, a hydrogen pressure regulating device, a steam pressure regulating device, a heat exchanging device and the like, and meanwhile, an energy storage battery, a gas storage device and a heat accumulating device can be arranged on a transmission pipeline.

The micro energy network is a system directly connected with the load of the user end, a plurality of micro energy networks can be arranged according to the number of end users and the regional distribution condition, and one micro energy network can be regarded as a miniaturized, intelligent and distributed energy supply system for intensively providing electric power, steam, cold and hot water and the like required by the end users.

Fig. 5a is a schematic diagram of a distributed energy station according to an exemplary embodiment. As shown in fig. 5a, the distributed energy station may include a power generation device, a waste heat recovery device, a cold-hot water conversion device, a plurality of device controllers, a plurality of device agent modules, and a distributed energy station agent module.

The power generation device is used for converting energy media from the corresponding micro energy network into electric power and waste heat, returning the converted electric power to the corresponding micro energy network and conveying the converted waste heat to the waste heat recovery device, wherein the power generation device comprises one or more of a fuel cell, an internal combustion engine, a gas turbine and a micro gas turbine, the fuel cell is used for converting hydrogen from the corresponding micro energy network into electric power and smoke, the internal combustion engine is used for converting gas from the corresponding micro energy network into electric power, smoke and cylinder liner water waste heat, the gas turbine is used for converting gas from the corresponding micro energy network into electric power and smoke, and the micro gas turbine is used for converting gas from the corresponding micro energy network into electric power and smoke.

The waste heat recovery device is used for converting waste heat from the power generation device into steam, cold water or hot water and returning the steam, the cold water or the hot water to the corresponding micro energy network. And the cold and hot water conversion device is used for converting the energy medium from the corresponding micro energy network into cold water or hot water and returning the cold water or hot water to the corresponding micro energy network.

The distributed energy station agent modules are connected with the device agent modules.

The primary input energy of the distributed energy station may be based on natural gas. The upstream of the distributed energy station is mainly connected with the micro energy network and receives hydrogen, fuel gas, high-temperature hot water, electric power and part of industrial and municipal waste heat input from the micro energy network. The energy production and conversion equipment in the distributed energy station mainly comprises a fuel cell, a gas internal combustion engine, a gas turbine, a micro-combustion engine, a flue gas hot water type lithium bromide cold-warm water unit, a steam type lithium bromide absorption type cold-warm water unit, a hot water type lithium bromide absorption type cold-warm water unit, a direct combustion engine, an electric refrigerating unit and an absorption type heat pump, wherein various energy sources input by a micro-energy network or peripheral industrial municipal waste heat are converted into electric power required by an end user side, and the electric power and the cold-hot water are conveyed to the micro-energy network for the end user after being converted.

The device controller may include a receiving module and a control module.

The receiving module is used for receiving a control instruction sent by the device agent module corresponding to the device controller; the control module is connected with the receiving module and is used for controlling the device corresponding to the device controller to convert and store energy according to the control instruction.

That is, a control instruction is determined and transmitted by the device agent module, and a corresponding device is controlled by the device controller, as shown in fig. 5 a.

Fig. 5b is a schematic diagram of a distributed energy station provided by another exemplary embodiment. In the embodiment shown in fig. 5b, the fuel cell is connected to one or more of a gas turbine, a micro gas turbine, and the gas turbine and micro gas turbine are used to convert a portion of the thermal energy in the high temperature flue gas generated by the fuel cell into electricity. Specifically, the device connected to the fuel cell in fig. 7 includes a gas turbine and a micro gas turbine. In this way, the hydrogen from the corresponding micro energy network is firstly converted into electric power and high-temperature flue gas in the fuel cell, the high-temperature flue gas enters the combustion chambers of the gas turbine and the micro gas turbine, and after being mixed with the high-temperature flue gas generated by the combustion of the gas from the corresponding micro energy network in the combustion chambers, the high-temperature flue gas continuously expands and works in the gas turbine and the micro gas turbine to convert part of heat energy in the high-temperature flue gas into electric power, and the residual heat energy of the high-temperature flue gas is conveyed to the waste heat boiler to be recycled to generate steam, so that the utilization efficiency of energy and the power generation efficiency of the power generation device are improved through multiple step utilization of energy, and the energy is saved.

In the embodiment of fig. 5b, the cold-hot water conversion device comprises a flue gas hot water type lithium bromide cold-warm water unit. The smoke hot water type lithium bromide cold-warm water unit is connected with the internal combustion engine and is used for converting the waste heat of high-temperature smoke and cylinder liner water output by the internal combustion engine into cold water or hot water.

In addition, the cold and hot water conversion device also comprises a waste heat boiler. The waste heat boiler is connected with the gas turbine and is used for generating smoke by utilizing high-temperature smoke output by the gas turbine so as to be converted into cold water or hot water by the waste heat recovery device.

Optionally, the cold-hot water conversion device can also comprise a waste heat boiler and a steam type lithium bromide cold-warm water unit. The waste heat boiler is connected with the micro gas turbine and is used for generating steam by utilizing high-temperature flue gas output by the micro gas turbine, and the generated steam can be directly conveyed to a corresponding micro energy network. The steam type lithium bromide cold-warm water unit is connected with the waste heat boiler and is used for converting cold water or hot water by utilizing steam output by the waste heat boiler.

The cold-hot water conversion device can further comprise a hot water type lithium bromide cold-hot water unit, and the hot water type lithium bromide cold-hot water unit is used for converting hot water from a corresponding micro energy network into cold water or returning hot water to the corresponding micro energy network.

The cold-hot water converting device may further include a direct combustion engine for converting cold or hot water using fuel gas from the corresponding micro-energy network.

The cold-hot water converting device may further comprise an electric refrigerator group for converting cold water using electric power from the corresponding micro-energy network.

In the distributed energy station of fig. 5b, the cold-hot water converting device further comprises a heat pump for converting one or more of local geothermal heat, waste sewage heat, industrial waste heat into cold water or hot water back to the corresponding micro-energy network. In addition, the heat pump can also utilize electricity from the corresponding micro energy network to convert cold or hot water.

The distributed energy stations are established at the user side, and a plurality of distributed energy stations can be established according to the load condition of the user side. Because the real-time load demand condition of each end user always changes in the actual operation process and the fluctuation is larger, the operation condition of each distributed energy station also has inconsistency, thus taking the inconsistency and the inconsistency of the user load into consideration in the whole planning, construction and operation process of an energy internet system, and interconnecting each distributed energy station through a micro energy network, thereby achieving the purpose and effect of realizing mutual standby between stations and effectively reducing the system installation capacity and equipment investment of a single distributed energy station. When one distributed energy station still cannot meet the user load demand when reaching the maximum design output power, the electric power, steam, cold and hot water and the like generated by the other distributed energy station can be transmitted through the micro energy network so as to meet the local user load demand, the high-efficiency operation of the system and the high-efficiency utilization of equipment are maintained on the whole, the whole installation scale of the whole energy system can be controlled, and the reduction of the whole investment scale is facilitated.

The user side monitoring subsystem can be provided with a corresponding proxy module, the proxy module is used for determining an operation scheme together with the proxy modules of other subsystems according to the energy medium information and the device operation data, and sending a control instruction to the corresponding device according to the determined operation scheme, wherein the control instruction is used for indicating the conversion, storage and transmission of the energy medium.

The hardware components of the energy internet system are described above. The energy internet system of the present disclosure needs to consider the actual demands of the load of the user when each piece of hardware is equipped, but as described above, the real-time demand of the load of each end user always changes, and the volatility is large. The energy internet system can also control energy to be converted in real time according to the change of the load of the user and transmit the energy between different subsystems.

Through the technical scheme, the energy internet system is established, wherein the centralized regional energy stations and the distributed energy stations are combined, the micro energy network is added, and the functions of peak regulation and complementary standby are achieved through energy interconnection, intercommunication and conversion among the plurality of distributed energy stations and the plurality of micro energy networks on the basis of centralized energy generation of the regional energy stations. And the energy and information are interconnected and communicated among the micro energy networks, and each micro energy network can be in grid connection or off-grid operation with the transmission and distribution network. In this way, not only the reasonable utilization of energy is promoted, but also the production of regional energy stations and distributed energy stations can be adjusted according to the operation scheme determined by the energy medium information and the device operation data. Therefore, the production and the utilization of energy can be controlled in real time, and the requirements and the supply of the energy are matched, so that the energy is saved.

On the one hand, the energy system level builds a centralized energy production and conversion mode combining regional energy stations and a plurality of distributed energy stations, and fully exerts the advantages of various energy sources according to local conditions in the process of energy production, conversion and storage, complements multiple energies, improves the use of renewable energy sources and clean energy sources, and improves the efficiency of energy production and utilization; on the other hand, a mode of energy source transportation and storage combining a transportation and distribution network and a plurality of distributed micro-energy networks is constructed, and the transportation and distribution and peak regulation capacities of energy sources are improved.

In the information and control layer, the cloud computing architecture is utilized to construct a multi-agent system, the multi-agent system is a combination of a centralized operation management system and a plurality of distributed operation management systems, and the multi-agent system can comprehensively consider the multi-dimensional optimization control of energy, economy, environment and the like from two aspects of global and local respectively on the whole life cycle of energy, so that the energy Internet becomes a novel energy supply system with supply and demand interaction and self-organization.

The disclosure also provides a control method of the energy internet system. The subsystem of the energy internet system comprises a regional energy station, a transmission and distribution network, a plurality of micro energy networks, a plurality of distributed energy stations and a plurality of user terminal monitoring subsystems. Each subsystem includes a plurality of devices. Fig. 6 is a flowchart of a control method of an energy internet system according to an exemplary embodiment. As shown in fig. 6, the method may include the following steps.

In step S11, energy flow information, material flow information, fund flow information, operation data of each device, environmental information outside the energy internet system, and market information between each subsystem and between devices inside each subsystem are acquired.

In step S12, an operation scheme is determined by using a multi-agent system according to the energy source flow information, the material flow information, the fund flow information, the operation data, the environment information and the market information, wherein the multi-agent system comprises a plurality of agent modules corresponding to each device, each subsystem and the energy internet system one by one.

In step S13, the corresponding agent module sends a control instruction to the corresponding subsystem and the corresponding device according to the determined operation scheme, where the control instruction is used to instruct the corresponding subsystem and the corresponding device to perform conversion, storage and transmission of energy and substances, and record energy transaction information.

The energy source flow information may include the type (form), quantity, etc. of the energy source converted, stored, and transmitted, and may include the type, quantity, etc. of the energy source consumed and reserved for each user side load. The material flow information may include ancillary substances generated by the energy source during conversion, transport, such as exhaust gases, waste water, and the like. The funding flow information may include information on the funding flow generated by the energy source during conversion, storage and transmission. The operational data may include static parameters and operational state parameters of the respective devices, such as power, temperature, capacity, rotational speed, etc. The environmental information may include parameters of natural environment such as temperature, humidity, illuminance, ultraviolet intensity, precipitation, wind direction, etc. Market information may include real-time energy settlement costs, pollutant disposal costs, and the like. Each subsystem of the regional energy station, the transmission and distribution network, the micro energy network and the distributed energy station can acquire the various information in real time.

In an embodiment, the control method of the energy internet system may further include the following steps.

Judging whether each device operates normally or not according to the operation data; and when judging that the abnormal operation device exists, operating the subsystem where the abnormal operation device is located off-line.

The data range of normal operation of each device may be stored in advance, and when the real-time operation data of the device is not in the range, the device may be determined to be abnormally operated. When one or more devices in a subsystem are not operating properly, the subsystem may be temporarily disconnected from the energy source of the other subsystem, i.e., the subsystem is operating off-grid. After off-grid, the abnormal device can be maintained and replaced, and the off-grid operation can avoid transmission errors caused by the fact that energy cannot be transmitted according to an expected scheme. In particular, there may be a plurality of micro-energy networks and distributed energy stations, wherein off-grid operation of one subsystem does not cause interruption of energy transmission through the energy internet.

For example, because the energy interconnection, intercommunication and conversion can be carried out among a plurality of micro energy networks, the energy connection between the micro energy networks and the transmission and distribution network can be disconnected, so that the micro energy networks and the transmission and distribution network can run off-line. Because the energy can be interconnected and communicated among the micro energy networks, the load of the user end can not be influenced in a short time. And the fault in the transmission and distribution network can be solved and then connected with the micro energy network. Thus, the operation reliability of the energy Internet system is ensured.

In yet another embodiment, the step of applying the multi-agent system to determine an operating scheme (step S12) may include the following steps according to energy flow information, material flow information, funds flow information, operating data, environmental information, and market information.

Determining an energy consumption rule of the user side load according to historical data of the user side load energy consumption;

and determining an operation scheme by using the multi-agent system according to the energy consumption rule, the energy source flow information, the material flow information, the fund flow information, the operation data, the environment information and the market information.

The historical data can include the amount and time of electricity, heat, gas, steam and water used by the user side. Historical data includes data in the form of pictures, audio, and video. The machine learning algorithm can be applied to analyze the historical data of the energy consumption of the load of the user end, and the energy consumption rule of the load of the user end is determined. The energy consumption law can be measured by various dimensions such as time, duration, class and quantity of energy consumption. For example, a user's energy consumption is regular to consume energy only between 8 and 12 pm throughout the day, and the types of consumed energy include a range of hot water and electricity.

On the basis of determining the energy consumption law, whether the current energy conversion progress can meet the consumption of the user side can be judged, and if the current energy conversion progress cannot meet the consumption of the user side, control instructions for supplying energy can be sent to other adjacent subsystems, so that the other adjacent subsystems can help to supply the energy consumption of the user side.

In addition, the user side can reserve energy consumption. When a certain user terminal reserves more energy consumption in a short period, the current energy conversion progress is not judged to be capable of meeting the consumption of the user terminal, and at the moment, control instructions for supplying energy can be sent to other adjacent subsystems. For example, the micro energy network corresponding to the user terminal cannot meet the reserved consumption of the natural gas by the user terminal, and a control instruction can be sent to the adjacent micro energy network to instruct the micro energy network to directly (or through a transmission and distribution network) transmit a preset amount of hot water to the micro energy network.

The operation scheme of the energy Internet system is determined according to the energy consumption rule of each user side, so that control instructions are sent to the devices of each subsystem, and the energy converted, stored and transmitted by each device is more in line with the requirements of the user side, so that the energy is more reasonably utilized, and the energy saving is facilitated.

In an embodiment, the step of determining the energy consumption rule of the client load according to the historical data of the client load energy consumption may include: and analyzing historical data of the load energy consumption of the user side by applying a machine learning algorithm, and determining the energy consumption rule of the load of the user side.

That is, on the basis of storing the energy consumption data of the user side, the energy consumption rule of the load of the user side can be analyzed and determined through some commonly used machine learning algorithms. The processor executing the machine learning algorithm may be located in the client monitoring subsystem or in the micro-energy network corresponding to the client load. In the embodiment, the peak regulation effect of energy consumption can be realized through energy scheduling, and the stability of energy supply in the system is ensured.

In an embodiment, the step of applying the multi-agent system to determine the operating scheme may include the steps of.

When the quantity or quality of energy production, conversion, storage and transmission in the first device is changed, the first proxy module corresponding to the first device determines a first optimization target aiming at the first device and controls the production, conversion, storage and transmission of the energy in the first device according to the first optimization target. Wherein determining the first optimization objective may include: and according to the thermal economy method and an energy balance model, a material balance model, a cost input and output balance model and a pollutant emission model of the first device, carrying out cost analysis on the first device, and determining a first optimization target according to an analysis result.

A second agent module corresponding to a second device associated with the first device determines a second optimization objective for the second device and controls production, conversion, storage, and transmission of energy in the second device in accordance with the second optimization objective. Wherein determining the second optimization objective may include: and according to the thermal economy method and an energy balance model, a material balance model, a cost input and output balance model and a pollutant emission model of the second device, carrying out cost analysis on the second device, and determining a second optimization target according to an analysis result.

And a third generation module corresponding to the first subsystem where the first device is located determines a third optimization target aiming at the first subsystem, and controls the transmission of energy among all devices in the first subsystem according to the third optimization target. Wherein determining the third optimization objective may include: and according to the thermal economy method and the energy balance model, the material balance model, the cost input and output balance model and the pollutant emission model of the first subsystem, carrying out cost analysis on the first subsystem, and determining a third optimization target according to an analysis result.

And a fourth agent module corresponding to a second subsystem where the second device is located determines a fourth optimization target aiming at the second subsystem, and controls the transmission of energy among all devices in the second subsystem according to the fourth optimization target. Wherein determining the fourth optimization objective may include: and according to the thermal economy method and an energy balance model, a material balance model, a cost input and output balance model and a pollutant emission model of the second subsystem, carrying out cost analysis on the second subsystem, and determining a fourth optimization target according to an analysis result.

And the fifth agent module corresponding to the energy internet system determines a fifth optimization target aiming at the energy internet system, and controls the transmission of energy among all subsystems in the energy internet system according to the fifth optimization target. Wherein determining the fifth optimization objective may include: and according to the thermal economy method, an energy balance model, a material balance model, a cost input and output balance model and a pollutant emission model of the energy internet system, carrying out cost analysis on the energy internet system, and determining a fifth optimization target according to analysis results.

The first device and the second device may be any devices in the energy internet system. The first subsystem and the second subsystem may be any subsystem in the energy internet system. The first proxy module and the second proxy module are device proxy modules. The third generation module and the fourth proxy module are proxy modules of the subsystem. The first, second, etc. described above are for distinction only.

The method can be independently applied to any subsystem. For example, a control method of a distributed energy station may include:

when the quantity or quality of energy production, conversion, storage and transmission in a first device in the distributed energy station is changed, a device agent module corresponding to the first device determines a first optimization target aiming at the first device, and controls the production, conversion, storage and transmission of the energy in the first device according to the first optimization target.

The device agent module corresponding to a second device associated with the first device determines a second optimization objective for the second device and controls production, conversion, storage, and transmission of energy in the second device according to the second optimization objective.

The distributed energy station agent module determines a third optimization target for the distributed energy station and controls the transmission of energy among all devices in the distributed energy station according to the third optimization target.

There may be various reasons for the change in the quantity or quality of the energy produced, converted, stored, transported in the first device. For example, the amount of power generated by the solar device decreases due to the decrease in illuminance, and the amount of power generated by the wind decreases due to the decrease in wind.

The proxy module of each subsystem may communicate with the proxy modules of other subsystems over a network. The multi-agent system is adopted to determine the operation scheme, so that the energy Internet system can perform centerless and autonomous control.

That is, each agent module can independently determine an operation scheme, and can also jointly determine the operation scheme with any other agent module with an association relationship. For example, when any device changes the amount or class of energy to be produced, converted, stored, or transmitted, or when any user changes the amount or class of energy to be consumed, the corresponding agent module may first determine an internal operation scheme (internal optimization), determine a preferred amount of energy to be produced, converted, stored, transmitted, or consumed, and then determine an external operation scheme (joint optimization) with other agent modules having a correlation.

The internal optimization and the combined optimization aim at optimizing according to the comprehensive optimization of energy, economy and environment, optimizing main operation parameters of the energy Internet, determining connection relations among various devices and various energy sources, energy input and output, optimizing main operation parameters of the devices, and determining operation tasks and schemes of the devices.

Through the technical scheme, the multi-agent system is utilized to interconnect, intercommunicate and convert energy sources among all subsystems, so that the effects of peak regulation and complementary standby are achieved. Therefore, the production and the utilization of energy can be controlled in real time, the requirements and the supply of the energy are matched, and the reasonable utilization of the energy is promoted, so that the energy is saved.

In still another embodiment, the step of the corresponding proxy module transmitting the control instruction to the corresponding subsystem or the corresponding device according to the determined operation scheme (step S13) may include the following steps.

Each agent module sends a control message to a device controller connected with the agent module according to the determined operation scheme; and when the device controller sends a control instruction to a corresponding subsystem or a corresponding device according to the control message, and after the control instruction is successfully sent, a confirmation message is sent to a proxy module connected with the controller.

That is, each device is connected to a corresponding device agent module through a device controller, and each subsystem has a corresponding agent module. These proxy modules constitute a multi-proxy system. The control message may be resent if the agent module does not receive the acknowledgement message sent by the device controller.

On the basis of reasonable energy distribution, the energy internet system can also be used for settling energy cost. In an embodiment, the method may further comprise the following steps.

Acquiring energy transaction information of each subsystem and each device;

and according to the energy transaction information, settling the energy cost by using a blockchain technology.

The energy transaction information may include, for example, ID of each transaction party, time of transaction, type of energy, quantity of energy, flow direction of energy, etc., and the energy transaction information may be stored in a device associated with the transaction or a distributed ledger at the user side, where the transaction party may be two or more parties. The block chain algorithm can be adopted to establish an energy transaction module of a regional energy station, a distributed energy station, a transmission and distribution network, a micro energy network and a user side monitoring subsystem, and the energy transaction module stores distributed account books, intelligent contracts, energy transaction information and the like which are in one-to-one correspondence with each device and the user side. The energy transaction module adopts a distributed storage mode.

The energy transaction information such as the type and the quantity of the energy in the energy transaction module, the flow direction of the energy in the energy transaction process and the like can be provided by the agent module. Or in the running process of the energy internet, any device or user side in the subsystem can send a transaction request to the energy transaction module. The transaction request is used for requesting circulation and conversion of energy, and the transaction request can comprise energy transaction information. When the energy transaction module confirms that the transaction is carried out, a transaction instruction can be sent to the corresponding proxy model according to the transaction request, and the corresponding proxy model sends a control instruction to the corresponding device or the user so as to indicate the circulation of energy.

In the embodiment, the safety of energy cost settlement is ensured by a blockchain technology, so that the fund safety of a user is ensured, and economic disputes are avoided.

In the energy internet system of the present disclosure, users can also conduct online transactions for energy. For example, a user terminal is a larger park, and the corresponding micro energy network is only corresponding to the park, so if the park has a vacation for a longer time, the energy sources in the corresponding micro energy network face idle situations in the vacation. At this time, the user can sell the energy in the energy on the internet.

The user can upload the energy transaction information on a platform of the energy internet system. The energy trading information may include the category, quantity, price, etc. of the energy source. When other users need to purchase, the two parties can agree on the energy internet system platform, namely, the two parties of the transaction agree to the transaction. At this time, the multi-agent system can automatically send a control instruction to the corresponding subsystem according to the transaction information of the two parties. Therefore, the user can conduct energy transaction through the platform of the energy internet system, and great convenience is brought to the user.

The settlement of the fees can be carried out automatically by a multi-agent system or after confirmation by a user. In still another embodiment, the step of settling the energy costs by applying the blockchain technique according to the energy transaction information may include the following steps.

Generating payment data by using a blockchain technology according to the energy transaction information; sending payment data to the corresponding proxy module; when receiving the payment information sent by the corresponding agent module in response to the payment data, the agent module communicates with the financial system according to the payment information so as to settle the energy cost.

The payment data may include, among other things, unit price, quantity, category, total price of the transaction energy, ID of both transaction parties, transaction time, transaction status, etc. When the user's communication terminal receives the payment data, the user may be prompted to confirm the payment data and to input payment information to make a payment. The payment information may include information for payment such as a bank card account number, a password, an amount, and the like.

The communication terminal may then transmit the payment information to an energy transaction module in the control system, which may communicate with a financial system (e.g., a bank, etc.) based on the payment information to settle the energy fee.

In the embodiment, the energy cost can be managed by the user, the safety is high, and the individuation degree is high.

The agent modules of the subsystems can communicate with each other through Ethernet, and the devices inside each subsystem can communicate with each other through an industrial control bus.

The various embodiments of the present disclosure may be combined with one another without conflict. For example, when the micro energy network corresponding to a user terminal cannot meet the reservation consumption of natural gas by the user terminal, the cost, heat loss, pollution caused by transferring hot water between the micro energy networks and the micro energy networks, etc. of a predetermined amount of hot water transferred from each micro energy network to the micro energy network corresponding to the user terminal can be calculated, and then the micro energy network with the best combination of economical efficiency and environmental performance is selected from the cost, heat loss, pollution caused by transferring hot water between the micro energy networks and the like, and the micro energy network is configured as a task for supplying energy to the user terminal.

For another example, when the hot water supply of the micro energy network a and the distributed energy stations corresponding to the load of the user end is insufficient, one or more micro energy networks B with hot water supply capability can be selected from the micro energy networks closer to the micro energy network a, and a control instruction is sent to the micro energy networks, so that the micro energy networks B are instructed to transmit the hot water with specified grade and quantity to the transmission and distribution network, a control instruction is sent to the transmission and distribution network, so that the transmission and distribution network is instructed to transmit the hot water transmitted by the micro energy networks B to the micro energy network a, and the micro energy network a is instructed to transmit the hot water received from the transmission and distribution network to the corresponding load of the user end.

For another example, when the hot water supply of the corresponding micro energy network a and the distributed energy stations is insufficient for a user end load, one or more micro energy networks B with hot water supply capability can be selected from the micro energy networks closer to the micro energy network a, and a control instruction is sent to the micro energy networks B to instruct the micro energy networks B to directly transmit the hot water with the specified grade and quantity to the micro energy networks a, and a control instruction is sent to the micro energy networks a to instruct the micro energy networks a to transmit the hot water received from the micro energy networks B to the corresponding user end load.

Thus, the load demand of local users is met, the efficient operation of the system and the efficient utilization of equipment are maintained on the whole, and the whole installation scale of the whole energy system can be controlled, so that the whole investment scale is reduced.

The disclosure also provides a control system of the energy internet system. The subsystem of the energy internet system comprises a regional energy station, a transmission and distribution network, a plurality of micro energy networks, a plurality of distributed energy stations and a plurality of user terminal monitoring subsystems. Each subsystem comprises a plurality of devices, the control system comprises a multi-agent system, and the multi-agent system comprises a plurality of agent modules which are in one-to-one correspondence with each device, each subsystem and the energy internet system.

Fig. 7 is a schematic diagram of a multi-agent system of an energy internet system provided by an exemplary embodiment. As shown in fig. 7, the proxy modules of the respective subsystems may be arbitrarily connected. For example, any distributed energy station agent module and other distributed energy station agent modules can be arbitrarily connected before any micro energy network agent module.

Each agent module comprises an acquisition sub-module, a determination sub-module and a sending sub-module.

The acquisition sub-module is used for acquiring energy flow information, material flow information, fund flow information, operation data of each device and environment information and market information outside the energy internet system between each sub-system or between devices inside each sub-system.

The determining submodule is used for determining an operation scheme according to energy source flow information, material flow information, fund flow information, operation data, environment information and market information.

The sending sub-module is used for sending control instructions to the corresponding sub-system and the corresponding device according to the determined operation scheme, wherein the control instructions are used for indicating the corresponding sub-system and the corresponding device to convert, store and transmit energy and substances and record energy transaction information.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. A distributed energy station, the distributed energy station comprising:

a power generation device for converting energy medium from the corresponding micro energy grid into electricity and waste heat, returning the converted electricity to the corresponding micro energy grid, and delivering the converted waste heat to a waste heat recovery device, wherein the power generation device comprises one or more of a fuel cell for converting hydrogen from the corresponding micro energy grid into electricity and flue gas, an internal combustion engine for converting gas from the corresponding micro energy grid into electricity, flue gas and cylinder liner water waste heat, a gas turbine for converting gas from the corresponding micro energy grid into electricity and flue gas, and a micro gas turbine for converting gas from the corresponding micro energy grid into electricity and flue gas;

the waste heat recovery device is used for converting waste heat from the power generation device into steam, cold water or hot water and returning the steam, the cold water or the hot water to the corresponding micro energy network;

the cold and hot water conversion device is used for converting an energy medium from a corresponding micro energy network into cold water or hot water and returning the cold water or hot water to the corresponding micro energy network;

The distributed energy station also comprises a plurality of device controllers which are connected with a plurality of devices in the distributed energy station in a one-to-one correspondence manner, a plurality of device agent modules which are connected with the device controllers in a one-to-one correspondence manner, and a distributed energy station agent module which is connected with the device agent modules;

the cold and hot water converting apparatus includes:

the waste heat boiler is connected with the gas turbine and is used for generating smoke by utilizing the smoke output by the gas turbine so as to be converted into cold water or hot water by the waste heat recovery device;

the waste heat boiler is connected with the micro gas turbine and is used for generating steam by utilizing the flue gas output by the micro gas turbine;

and the steam type lithium bromide cold-warm water unit is connected with the waste heat boiler and is used for converting cold water or hot water by utilizing steam output by the waste heat boiler.

2. The distributed energy station of claim 1, wherein the fuel cell is coupled to one or more of the gas turbine and the micro gas turbine, the gas turbine and the micro gas turbine being configured to convert a portion of the thermal energy in the flue gas generated by the fuel cell to electricity.

3. The distributed energy station of claim 1, wherein the cold water and hot water conversion device comprises:

and the smoke hot water type lithium bromide cold-warm water unit is connected with the internal combustion engine and is used for converting the waste heat of smoke and cylinder liner water output by the internal combustion engine into cold water or hot water.

4. The distributed energy station of claim 1, wherein the cold water and hot water conversion device comprises:

and the hot water type lithium bromide cold-warm water unit is used for converting the high-temperature hot water from the corresponding micro energy network into cold water or returning the hot water to the corresponding micro energy network.

5. The distributed energy station of claim 1, wherein the cold water and hot water conversion device comprises:

the heat pump is used for converting one or more of geothermal heat, sewage waste heat and industrial waste heat into cold water or hot water and returning the cold water or the hot water to the corresponding micro energy network.

6. The distributed energy station of claim 1, wherein the device controller comprises:

the receiving module is used for receiving the control instruction sent by the device agent module corresponding to the device controller;

and the control module is connected with the receiving module and used for controlling the device corresponding to the device controller to convert and store energy according to the control instruction.

7. A method of controlling a distributed energy station, the method comprising:

8. The method of claim 7, wherein the step of determining the position of the probe is performed,

determining the first optimization objective includes: according to a thermal economy method, an energy balance model, a material balance model, a cost input and output balance model and a pollutant emission model of the first device, carrying out cost analysis on the first device, and determining the first optimization target according to an analysis result;