CN111928317A - User side micro energy network energy supply system - Google Patents

Abstract

The invention discloses a user-side micro-energy network energy supply system, including a residential community micro-energy network, a business park micro-energy network, an industrial area micro-energy network, and an agricultural area micro-energy network. Micro-energy grids, industrial micro-energy grids, and agricultural micro-energy grids all include: Input unit: connected to external power grids, municipal heat grids, natural gas grids, and other micro-energy grids to input electrical and thermal energy from other micro-energy grids ; Intermediate energy production, conversion and storage unit: including cold, heat, and electricity three busbars, energy conversion equipment and energy storage equipment; The excess electricity is connected to the grid or supplied to other micro-energy grids, and the excess heat energy is supplied to other micro-energy grids. The invention can realize clean and efficient, energy-saving and environment-friendly cascade utilization, complementary coordination, safety and high quality in the whole process of energy production, transmission and utilization.

Description

User-side micro-energy grid energy supply system

technical field

The invention belongs to the technical field of power grids, and specifically relates to the technical fields of microgrids and integrated energy systems.

Background technique

my country is facing a "comprehensive energy era" in which new energy and fossil energy complement each other. Under the energy demand of the new era, my country urgently needs to take a new round of technological revolution and industrial revolution as the fulcrum to transform from the extensive development model in the past to a more intensive development model. , sustainable development model, and establish a more efficient, safe and sustainable energy utilization model. The distributed energy system provides an effective way for commercial or industrial users who need cold, heat and electricity, as well as island power supply and mobile power supply. It is difficult to achieve coordination and mutual assistance within a certain area. On the other hand, in the traditional energy system, different energy industries such as power supply, heating and cooling are relatively closed, and the degree of interconnection is limited. Different systems are planned and operated in isolation, which is not conducive to the improvement of energy efficiency and the consumption of renewable energy.

The micro-energy grid organically combines various energy links such as electricity, gas, heating/cooling, etc. with users. Through the scientific dispatch of various energy sources in the system, it can achieve efficient energy utilization, meet users' multi-energy cascade utilization, At the same time, through the organic coordination of various energy systems, it can also help to eliminate the bottleneck of the power distribution system and improve the utilization efficiency of various energy equipment; when the electricity or gas system is interrupted due to weather or unexpected disasters, The user-side micro-energy grid can use local energy to achieve uninterrupted energy supply to important users, and provide power support for the rapid recovery of the energy supply system after a fault. At present, energy interconnection is mainly concentrated on the user side. How to build a reasonable micro-energy network access and coordinate multiple energy interconnections through local networks has become the development direction of energy Internet technology.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a user-side micro-energy network energy supply system, which coordinates the interconnection of multiple energy sources, and realizes clean and efficient energy production, transmission, and utilization of the entire process, energy-saving and environmentally friendly cascade utilization, complementary coordination, and safety and high quality.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: the user-side micro-energy network energy supply system includes a residential community micro-energy network, a business park micro-energy network, an industrial area micro-energy network, and an agricultural area micro-energy network. Community micro-energy network, business park micro-energy network, industrial area micro-energy network, agricultural area micro-energy network include:

Input unit: connected to the external power grid, municipal heating grid, and natural gas grid, in which the external grid is used as the backup power supply for the micro-energy grid. Connect, input the electrical and thermal energy of other micro-energy grids;

Intermediate energy production, conversion and storage unit: including cold, hot, and electric busbars, energy conversion equipment and energy storage equipment, wherein the cold, hot, and electric busbars respectively collect the corresponding energy flows, and are realized by the corresponding energy conversion equipment. Mutual conversion between the three energy flows, part of the excess energy is stored through the corresponding energy storage device;

Output unit: output cold, heat, and electricity to supply cold, heat, and electricity needs of users in the micro-energy grid, and the excess electricity is connected to the grid or supplied to other micro-energy grids, and the excess heat energy is supplied to other micro-energy grids.

Preferably, the residential community micro-energy grid includes gas turbines and photovoltaic power generation equipment for power generation; heat pump units, solar collectors and gas boilers for heating; hot water type absorption air-conditioning units for cooling, electric refrigerators; and flue gas-water heat exchangers;

(1) In summer working conditions, the high-temperature flue gas generated by the gas turbine after power generation enters the flue gas-water heat exchanger to prepare high-temperature hot water and enter the hot-water absorption air-conditioning unit to provide chilled water through absorption refrigeration; the heat pump unit The heat absorbed by the refrigerant in the air-conditioning system is transferred to the circulating water circuit on the side of the buried pipe to achieve the purpose of cooling; the insufficient cooling capacity is supplemented by the electric refrigerator;

(2) In winter conditions, the high-temperature flue gas generated by the gas turbine after power generation directly passes through the flue gas-water heat exchanger to prepare high-temperature hot water and provide a heating heat source; The heat is transferred to the refrigerant, and then the heat is transferred to the circulating water circuit on the air-conditioning side through the refrigerant cycle to dissipate heat to the room; the insufficient heat is supplemented by the gas boiler.

Preferably, the micro-energy grid of the business park includes an internal combustion engine cooling, heating and power co-generation equipment, and the internal combustion engine cooling, heating and power co-generation equipment includes a gas-fired internal combustion generator, a cylinder jacket water heat exchanger, and a lubricating oil cooler; Photovoltaic power generation equipment; heat pump units, solar collectors and gas boilers for heating; hot water absorption air conditioning units, electric refrigerators for cooling; and flue gas-water heat exchangers, plate heat exchangers;

(1) In winter conditions, when the gas internal combustion generator generates electricity, the high-temperature flue gas generated passes through the flue gas-water heat exchanger to exchange high-temperature hot water, which is cooled with the cylinder jacket water heat exchanger and the lubricating oil cooler. The water is supplied to the heat users together with the hot water prepared by the plate heat exchanger; the circulating water circuit on the buried pipe side of the heat pump unit transfers the heat stored in the soil to the refrigerant, and then transfers the heat to the circulating water circuit on the air conditioning side through the refrigerant circulation. Dissipate heat to the room; the insufficient heat is supplemented by the gas boiler;

(2) In summer working conditions, the flue gas waste heat generated by the gas internal combustion generator for power generation exchanges high-temperature hot water through the flue gas-water heat exchanger, and enters the hot-water absorption air conditioner together with the hot water prepared from the high-temperature cylinder jacket water. The unit provides chilled water to users through absorption refrigeration; the heat pump unit transfers the heat absorbed by the refrigerant in the air conditioning system to the circulating water circuit on the side of the buried pipe to achieve the purpose of cooling; the insufficient cooling capacity is supplemented by the electric refrigerator;

Preferably, the micro-energy grid in the industrial area includes photovoltaic power generation equipment and wind power generation equipment for power generation; heat pump units and gas boilers for heating, steam-water heat exchangers for heat exchange; Absorption air-conditioning units, electric refrigerators; and gas turbine cogeneration equipment, the gas turbine cogeneration equipment includes gas turbines, waste heat boilers, steam turbines, steam engines and sub-cylinders;

(1) In winter conditions, the high-temperature flue gas of the gas turbine first passes through the waste heat boiler to produce steam. After the steam drives the steam turbine to generate electricity, the steam is discharged. After being collected by the sub-cylinders, it is sent to the absorption air-conditioning unit for refrigeration and steam-water exchange. The heater provides hot water, or directly to the steam point to supply the industrial heat load; the circulating water on the buried pipe side of the heat pump unit transfers the heat stored in the soil to the refrigerant, and then transfers the heat to the air conditioner side through the refrigerant cycle. Circulating waterway to dissipate heat indoors; insufficient heat is supplemented by gas boilers;

(2) In summer conditions, the waste heat steam generated by the combined power generation of the gas turbine and the steam turbine enters the absorption air-conditioning unit after being collected by the sub-cylinders, and provides chilled water to the user through absorption refrigeration; the heat pump unit converts the heat absorbed by the refrigerant in the air-conditioning system. It is transferred to the circulating water circuit on the side of the buried pipe to achieve the purpose of cooling; the insufficient cooling capacity is supplemented by the electric refrigerator.

Preferably, the micro-energy grid in the agricultural area includes gas turbines, photovoltaic power generation equipment, wind power generation equipment, and biomass power generation equipment for power generation; waste heat direct combustion engines for heating, heat pump units, solar collectors and gas boilers ; Electric refrigerators for refrigeration;

(1) In winter conditions, the high temperature waste heat generated by the gas turbine power generation is used for absorption heating by the waste heat direct combustion engine to meet the heat demand of agricultural production; the heat pump unit transfers the heat in the soil to the room to achieve the purpose of heating; when the heat pump unit When the waste heat direct combustion engine cannot meet the user's thermal energy demand, the gas boiler is activated to supplement the insufficient part;

(2) In summer working conditions, the high temperature waste heat generated by the gas turbine power generation is used for absorption refrigeration by the waste heat direct combustion engine; the heat pump unit transfers the indoor heat to the soil to achieve refrigeration; when the heat pump unit and the waste heat direct combustion engine cannot meet the user's cooling requirements When energy is required, the electric refrigerator is activated to supplement the insufficient part.

The technical scheme adopted in the present invention takes into account conventional energy and various distributed renewable energy sources, takes energy network as a carrier, relies on information communication technology, and is a small energy system that meets users' various energy needs, and can realize energy production, transmission and utilization. The process is clean and efficient, energy saving and environmental protection cascade utilization, complementary coordination and safety and high quality.

Specifically, it has the following beneficial effects:

At the source end, the micro-energy grid utilizes technologies such as conversion between various energy forms and cheaper and larger-capacity thermal storage, which can significantly improve the level of renewable energy consumption and stabilize its fluctuations;

On the user side, it can meet the multi-grade energy needs of users in a targeted manner, and effectively improve the comprehensive utilization rate of energy under the premise of being user-centered;

On the transmission network side, a multi-energy open Internet can reduce network construction and improve system security and reliability.

The specific technical solutions of the present invention and the beneficial effects thereof will be described in detail in the following specific embodiments in conjunction with the accompanying drawings.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

Figure 1 is a schematic diagram of a typical structure and morphology of a micro-energy grid.

Figure 2 shows the energy supply mode of the micro-energy grid in the residential community.

Figure 3 shows the energy supply mode of the micro-energy grid in the commercial district.

Figure 4 shows the energy supply mode of the micro-energy grid in the industrial park.

Figure 5 shows the energy supply mode of the micro-energy grid in the agricultural park.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It can be understood by those skilled in the art that the features in the following embodiments and implementations can be combined with each other without conflict.

A user-side micro-energy grid energy supply system. Among them, the typical structural form of the micro-energy grid includes five types of energy units: energy production, conversion, storage, transmission, and utilization.

1) Energy production unit. It includes various primary energy sources and equipment that converts energy into cooling/heating/electric loads required by users. There are traditional energy sources, such as coal, oil, natural gas, water energy, wood, etc.; there are also distributed renewable energy sources such as wind energy, solar energy, water energy, biomass energy, geothermal energy and other non-fossil energy. Energy conversion equipment includes fans, photovoltaics, gas turbines, boilers, etc.;

2) Energy conversion unit. The energy conversion unit usually follows the conversion of high-grade energy to low-grade energy, and the energy tastes of electricity, heat, and cold decrease in turn, so the input of this unit is generally electricity and heat, and the output is generally heat and cold, which can realize cold/heat/electricity. Equipment for conversion between, including lithium bromide absorption refrigerators, heat exchangers, heat pumps and electric refrigerators, etc.;

3) Energy storage unit. The energy storage unit realizes energy transfer across time periods and coordinates the imbalance between "source-load" in the network, has the function of shaving peaks and filling valleys and restraining the fluctuation of renewable energy, and promotes the economical and efficient operation of the energy supply system. It is divided into electricity storage and heat storage. and cold storage, including electrochemical energy storage and water storage tanks;

4) Energy transmission unit. The energy transmission unit is divided into grid, heat grid and natural gas grid. Through the power grid, heat network, natural gas network, etc., each energy station, distributed energy and users will be established to establish an interconnected, coordinated and reliable energy transmission network.

5) Energy utilization unit. Including cold, heat, electricity three loads. Electric load changes are highly random, and it is difficult to store a large amount of electric energy with the current technology, and the electric power in the system must be kept in real-time balance; cold and heat energy is supplied to users in the form of high-temperature steam, air-conditioning hot water, air-conditioning cold water, and domestic hot water to coordinate to meet the needs of cooling and cooling. , There is a certain hysteresis in the process of heat load change. When supplying cold and heat energy to users, it is only necessary to ensure the balance of total supply and demand in the stage.

At present, in power planning and power industry statistics, power loads are often divided into four types of typical loads: industry, agriculture, commerce, and municipal life; according to their nature, heat loads can be divided into two categories: civil and industrial heat loads. Referring to the existing power load thermal load classification standards, based on the structure and operation mechanism of the micro-energy grid, combined with the user's energy consumption characteristics, and classified according to energy demand, energy supply conditions, and load types, the user-side micro-energy grid is mainly divided into four types The energy supply mode is the energy supply mode of the residential community micro-energy network, the micro-energy network energy supply mode of the business park, the micro-energy network energy supply mode of the industrial park, and the micro-energy network energy supply mode of the agricultural park.

Aiming at the phenomenon of repeated waste of energy and low overall efficiency caused by the diversity of loads on the user side, various forms of energy supply, and the inability of each form to connect, the present invention proposes a typical structural form and energy supply mode of a user-side micro-energy grid: micro-energy grid system The configuration on the user side is helpful for the access and efficient utilization of local renewable distributed energy. When the renewable energy generation is connected to the power system and encounters system operation constraints, compared with the strategy of abandoning wind and light, it can convert excess electric energy into Direct utilization or storage in the form of thermal energy and hydrogen, maximize the use of renewable resources, and achieve a clean and environmentally friendly energy production process; electricity, gas, heat and other energy sources in the micro-energy grid are complementary, and it is not easy to transmit electricity. Storage, thermal energy is easy to store and difficult to transmit. Through various energy conversion technologies and information flow and energy flow interaction technologies, the development and utilization of energy resources and the coordination between resource transportation networks and energy transmission networks can be realized, which can greatly improve the flexibility of the system. reliability and reliability, and provide users with safe and high-quality energy services.

As shown in Figure 1, a typical micro-energy grid consists of three parts: the input side, the output side, and the intermediate energy production, conversion and storage links. On the input side, the energy station makes full use of local distributed renewable resources such as wind energy, solar energy, biomass energy and geothermal energy according to local conditions. As the backup power supply of the micro-energy grid system, in addition to this, the input side also includes electric energy and thermal energy transmitted from other energy stations; on the output side, the energy station not only supplies the cold, heat and electricity needs of surrounding users, but also the excess electricity. It can be connected to the Internet or transmitted to other energy stations, and the excess heat can also be supplied to surrounding energy stations.

In the middle link, the three busbars of cold, heat and electricity collect the corresponding energy flows respectively, and the mutual conversion between the three energy flows can be realized through the corresponding energy conversion equipment. At the same time, each busbar is also equipped with a corresponding energy storage unit. , wind power and biomass are converted into electric energy by fans and gas turbines respectively, and then connected to the electric bus. The heat pump unit consumes electric energy, and uses soil, air, water and other heat sources to achieve heating in winter and cooling in summer. The input solar energy can be converted through solar collectors. The generated heat can also be converted into electricity through photovoltaics, and the input natural gas can be converted into heat through boilers, and can also be used as fuel for the coupled unit combined cooling, heating and power (CCHP) system to produce cold energy, electricity and heat energy.

The load in the spring and autumn of the micro-energy grid is mainly electric energy. The micro-energy grid only provides electric energy, and the energy production, storage and transmission units related to the electric energy work normally. The system operation under this working condition is relatively simple. Comprehensively considering energy demand, energy supply conditions, and characteristics of load types, the present invention proposes four typical energy supply modes for user-side micro-energy grids, namely residential communities, business parks, industrial parks, and agricultural parks. The system operation characteristics focus on summer working conditions. and winter conditions.

1. Typical residential community micro-energy network

The energy supply units of a typical residential community include: grid power supply, gas turbine cogeneration, heat pump, solar collector, photovoltaic power generation, wind power generation, etc. The system structure diagram is shown in Figure 2.

(1) In summer working conditions, the high-temperature flue gas generated by the gas turbine after power generation enters the flue gas-water heat exchanger to prepare high-temperature hot water and enter the hot-water absorption air-conditioning unit to provide chilled water through absorption refrigeration; the heat pump unit The heat absorbed by the refrigerant in the air-conditioning system is transferred to the circulating water circuit on the side of the buried pipe to achieve the purpose of cooling; the insufficient cooling capacity is supplemented by the electric refrigerator. If there is a demand for domestic hot water, a branch can also be branched out as a source of domestic hot water.

(2) In winter conditions, the high-temperature flue gas directly passes through the flue gas-water heat exchanger to prepare high-temperature hot water and provide heating heat sources; the circulating water on the buried pipe side of the heat pump unit transfers the heat stored in the soil to refrigeration Then, the heat is transferred to the circulating water circuit on the air-conditioning side through the refrigerant circulation, and the heat is dissipated to the room; the insufficient heat is supplemented by the gas boiler.

2. Micro energy network in business parks

Business parks have a general demand for heating and cooling loads, high demand for electricity and relatively high electricity prices, and are suitable for co-generation systems with internal combustion engines as the core. Combining the above characteristics, a typical business park energy supply unit includes: grid power supply, internal combustion engine cogeneration, heat pump, photovoltaic power generation, solar collector, and its system process diagram is shown in Figure 3.

(1) In winter conditions, when the gas internal combustion generator generates electricity, the high-temperature flue gas generated passes through the flue gas-water heat exchanger to exchange high-temperature hot water, which is exchanged with high-temperature cylinder jacket water and lubricating oil cooling water through plate heat exchange. The hot water prepared by the heat pump unit is supplied to the heat users together; the circulating water circuit on the buried pipe side of the heat pump unit transfers the heat stored in the soil to the refrigerant, and then the heat is transferred to the circulating water circuit on the air conditioning side through the refrigerant circulation to dissipate heat indoors; insufficient The heat is supplemented by a gas boiler.

(2) In summer working conditions, the flue gas waste heat generated by the gas internal combustion generator for power generation exchanges high-temperature hot water through the flue gas-water heat exchanger, and enters the hot-water absorption air conditioner together with the hot water prepared from the high-temperature cylinder jacket water. The unit provides chilled water to users through absorption refrigeration; the heat pump unit transfers the heat absorbed by the refrigerant in the air conditioning system to the circulating water circuit on the side of the buried pipe to achieve the purpose of cooling; the insufficient cooling capacity is supplemented by the electric refrigerator.

Since the COP of hot water type absorption air conditioners is relatively low, generally about 0.8, relatively speaking, if the hot water prepared from waste heat can be directly supplied to users, it is better to reduce the proportion of absorption refrigeration through hot water.

3. Industrial Park Micro Energy Network

Most of the industrial areas are located on the edge of the city, occupying a large area, the surrounding area is relatively open and the land price is low, which is suitable for installing wind turbines and photovoltaics. At present, internal combustion engines have certain advantages in small-capacity gas cooling, heating and power distributed energy systems, while gas turbines are attractive in large-scale systems. The power range of gas turbines is generally 1000-50000kW. Ships, locomotives, vehicles and other fields. The combined cycle power generation of gas turbine and steam turbine greatly improves the power generation efficiency of the system, which is very suitable for industrial parks with high demand for electricity and steam. domestic hot water load and cooling demand.

Combining the above characteristics, the energy supply units of typical industrial areas include: grid power supply, gas boilers, gas turbine cogeneration (cogeneration with steam turbine), photovoltaic power generation, wind power generation, etc. The system process diagram is shown in Figure 4.

(1) In winter conditions, the high temperature flue gas of the gas turbine first produces steam through the waste heat boiler. After the steam drives the steam turbine (extraction condenser or back pressure machine) to generate electricity, the steam is discharged. After being collected by the cylinders, it is sent to the absorption type. The air-conditioning unit performs refrigeration and the steam-water heat exchange device provides hot water, or directly sends it to the steam point to supply the industrial heat load; the circulating water on the buried pipe side of the heat pump unit transfers the heat stored in the soil to the refrigerant, and then circulates through the refrigerant. The heat is transferred to the circulating water circuit on the air-conditioning side to dissipate heat indoors; the insufficient heat is supplemented by the gas boiler.

(2) In summer conditions, the waste heat steam generated by the combined power generation of the gas turbine and the steam turbine enters the steam-type lithium bromide absorption air-conditioning unit after being collected by the sub-cylinders, and provides chilled water to the user through absorption refrigeration; the heat pump unit converts the refrigerant in the air-conditioning system. The absorbed heat is transferred to the circulating water circuit on the side of the buried pipe to achieve the purpose of cooling; the insufficient cooling capacity is supplemented by the electric refrigerator.

4. Micro energy network in agricultural parks

Compared with other parks, the natural power supply in the agricultural park is more abundant, the area is larger, the surrounding area is relatively empty and the land price is low, it is more feasible to use distributed resources for energy supply, and the renewable resources that can be used include Photovoltaic, wind power, hydropower, biomass energy (biogas, firewood), etc.

The load of agricultural parks can generally be divided into two categories: planting agriculture and breeding agriculture. Breeding agriculture includes aquaculture and poultry farming. The electrical equipment for aquaculture mainly includes circulating water systems, the electrical equipment for poultry farming mainly includes disinfection equipment, and the electrical equipment for planting agriculture is mainly irrigation pumps, which are mainly used for field irrigation. and harvesting projects, mainly use electricity during the day. In addition to the electrical load, planting agriculture such as greenhouses and indoor breeding of poultry usually need to keep the temperature within a certain range, and there are requirements for the temperature, so there is also a demand for thermal energy.

The efficiency of waste heat absorption air-conditioning units is basically equal to or slightly lower than that of gas boilers or steam-water heat exchangers in heating conditions, which is basically about 90%. In cooling conditions, the COP can reach more than 1.3. Because the power generation efficiency of the gas turbine is lower than that of the gas internal combustion engine, but the quality of the waste heat is higher (only one form of high-temperature flue gas), and the thermoelectricity is relatively large. Relatively stable places, such as greenhouses for growing vegetables and livestock pens in agricultural parks, can not only ensure the full-load operation time of the unit, but also make full use of the waste heat.

Combining the above characteristics, typical energy supply units in agricultural areas include: grid power supply, gas turbine cogeneration, photovoltaic power generation, wind power generation, biomass power generation, solar collectors, etc. The system process diagram is shown in Figure 5.

(1) In winter conditions, the high temperature waste heat generated by the gas turbine power generation is used for absorption heating by the waste heat direct combustion engine (waste heat lithium bromide absorption air conditioning unit); the heat pump unit transfers the heat in the soil to the room to achieve the purpose of heating; when When the heat pump unit and the waste heat direct combustion engine cannot meet the heat energy demand of the user, the gas boiler is used to supplement the insufficient part.

(2) In summer working conditions, the high temperature waste heat generated by the gas turbine power generation is used for absorption refrigeration by the waste heat direct combustion engine; the heat pump unit transfers the indoor heat to the soil to achieve refrigeration; when the heat pump unit and the waste heat direct combustion engine cannot meet the user's cooling requirements When energy is required, the electric refrigerator is activated to supplement the insufficient part.

The typical structural form of the user-side micro-energy grid proposed by the present invention presents its constituent elements and system characteristics from the aspects of energy generation, energy transmission network and energy utilization; through the analysis of four typical energy supply modes of the micro-energy grid, it can be proved Micro energy grid can effectively improve the energy utilization efficiency of end users, alleviate the contradiction between regional energy supply and demand, promote local consumption of distributed renewable energy, ensure the stability and reliability of energy supply, and achieve the purpose of energy conservation and emission reduction.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the above specific embodiments. Any modifications that do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims (5)

1. A user-side micro-energy network energy supply system, including a residential community micro-energy network, a business park micro-energy network, an industrial area micro-energy network, and an agricultural area micro-energy network, characterized in that: the residential community micro-energy network, business park micro-energy network Micro energy grids, industrial area micro energy grids, and agricultural area micro energy grids include: Input unit: connected to the external power grid, municipal heating grid, and natural gas grid, in which the external grid is used as the backup power supply for the micro-energy grid. Connect, input the electrical and thermal energy of other micro-energy grids; Intermediate energy production, conversion and storage unit: including cold, hot, and electric busbars, energy conversion equipment and energy storage equipment, wherein the cold, hot, and electric busbars respectively collect the corresponding energy flows, and are realized by the corresponding energy conversion equipment. Mutual conversion between the three energy flows, part of the excess energy is stored through the corresponding energy storage device; Output unit: output cold, heat, and electricity to supply cold, heat, and electricity needs of users in the micro-energy grid, and the excess electricity is connected to the grid or supplied to other micro-energy grids, and the excess heat energy is supplied to other micro-energy grids. 2. The user-side micro-energy grid energy supply system according to claim 1, characterized in that: the residential community micro-energy grid is provided with gas turbines and photovoltaic power generation equipment for power generation; heat pump units, solar energy generators for heating Heat collectors and gas boilers; hot water absorption air conditioning units for refrigeration, electric chillers; and flue gas-water heat exchanger; (1) In summer working conditions, the high-temperature flue gas generated by the gas turbine after power generation enters the flue gas-water heat exchanger to prepare high-temperature hot water and enter the hot-water absorption air-conditioning unit to provide chilled water through absorption refrigeration; the heat pump unit The heat absorbed by the refrigerant in the air-conditioning system is transferred to the circulating water circuit on the side of the buried pipe to achieve the purpose of cooling; the insufficient cooling capacity is supplemented by the electric refrigerator; (2) In winter conditions, the high-temperature flue gas generated by the gas turbine after power generation directly passes through the flue gas-water heat exchanger to prepare high-temperature hot water and provide a heating heat source; The heat is transferred to the refrigerant, and then the heat is transferred to the circulating water circuit on the air-conditioning side through the refrigerant cycle to dissipate heat to the room; the insufficient heat is supplemented by the gas boiler. 3. The user-side micro-energy grid energy supply system according to claim 1, characterized in that: the micro-energy grid in the business park is provided with internal combustion engine cooling, heating and power co-generation equipment; photovoltaic power generation equipment for power generation; Heat pump units, solar collectors and gas boilers for heating; hot water type absorption air conditioning units, electric refrigerators for cooling; and flue gas-water heat exchangers, plate heat exchangers, the internal combustion engine Co-production equipment includes gas internal combustion generator, cylinder jacket water heat exchanger, lubricating oil cooler; (1) In winter conditions, when the gas internal combustion generator generates electricity, the high-temperature flue gas generated passes through the flue gas-water heat exchanger to exchange high-temperature hot water, which is cooled with the cylinder jacket water heat exchanger and the lubricating oil cooler. The water is supplied to the heat users together with the hot water prepared by the plate heat exchanger; the circulating water circuit on the buried pipe side of the heat pump unit transfers the heat stored in the soil to the refrigerant, and then transfers the heat to the circulating water circuit on the air conditioning side through the refrigerant circulation. Dissipate heat to the room; the insufficient heat is supplemented by the gas boiler; (2) In summer, the flue gas waste heat generated by the gas internal combustion generator for power generation exchanges high-temperature hot water through the flue gas-water heat exchanger, and enters the hot water type together with the hot water prepared by the high-temperature cylinder jacket water heat exchanger. The absorption air-conditioning unit provides chilled water to users through absorption refrigeration; the heat pump unit transfers the heat absorbed by the refrigerant in the air-conditioning system to the circulating water circuit on the side of the buried pipe to achieve the purpose of cooling; the insufficient cooling capacity is supplemented by the electric refrigerator. 4. The user-side micro-energy grid energy supply system according to claim 1, wherein: the micro-energy grid in the industrial area is provided with photovoltaic power generation equipment and wind power generation equipment for power generation; heat pump units for heating and gas boilers, steam-water heat exchangers for heat exchange; absorption air-conditioning units, electric refrigerators for refrigeration; and gas turbine cogeneration equipment, which includes gas turbines, Waste heat boilers, steam turbines, steam engines and sub-cylinders; (1) In winter conditions, the high-temperature flue gas of the gas turbine first passes through the waste heat boiler to produce steam. After the steam drives the steam turbine to generate electricity, the steam is discharged. After being collected by the sub-cylinders, it is sent to the absorption air-conditioning unit for refrigeration and steam-water exchange. The heater provides hot water, or directly to the steam point to supply the industrial heat load; the circulating water on the buried pipe side of the heat pump unit transfers the heat stored in the soil to the refrigerant, and then transfers the heat to the air conditioner side through the refrigerant cycle. Circulating waterway to dissipate heat indoors; insufficient heat is supplemented by gas boilers; (2) In summer conditions, the waste heat steam generated by the combined power generation of the gas turbine and the steam turbine enters the absorption air-conditioning unit after being collected by the sub-cylinders, and provides chilled water to the user through absorption refrigeration; the heat pump unit converts the heat absorbed by the refrigerant in the air-conditioning system. It is transferred to the circulating water circuit on the side of the buried pipe to achieve the purpose of cooling; the insufficient cooling capacity is supplemented by the electric refrigerator. 5. The user-side micro-energy grid energy supply system according to claim 1, wherein the micro-energy grid in the agricultural area comprises gas turbines, photovoltaic power generation equipment, wind power generation equipment, and biomass power generation equipment for power generation; Waste heat direct combustion engine, heat pump unit, solar collector and gas boiler for heating; electric refrigerator for cooling; (1) In winter conditions, the high temperature waste heat generated by the gas turbine power generation is used for absorption heating by the waste heat direct combustion engine to meet the heat demand of agricultural production; the heat pump unit transfers the heat in the soil to the room to achieve the purpose of heating; when the heat pump unit When the waste heat direct combustion engine cannot meet the user's thermal energy demand, the gas boiler is activated to supplement the insufficient part; (2) In summer working conditions, the high temperature waste heat generated by the gas turbine power generation is used for absorption refrigeration by the waste heat direct combustion engine; the heat pump unit transfers the indoor heat to the soil to achieve refrigeration; when the heat pump unit and the waste heat direct combustion engine cannot meet the user's cooling requirements When energy is required, the electric refrigerator is activated to supplement the insufficient part.

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