Multi-energy complementary control system and method for terminal integrated energy supply mode

Abstract

The present invention discloses a multi-energy complementary control system and method of a terminal integrated energy supply mode. Specifically, the multi-energy complementary control system includes a primary dispatching system of a power system and an internal multi-energy complementary secondary dispatching system; the secondary dispatching system includes a multi-energy flow energy management system, a gas turbine power generation control system, a distributed photovoltaic control system, a distributed fan control system, a ground source heat pump control system, a refrigeration control system, a power storage system control system, a cold storage system control system, a demand side load forecasting management system and other auxiliary monitoring and management information systems; the primary dispatching system dispatches the secondary dispatching system as a whole, and performs comprehensive dispatching management on the whole according to the energy supply and energy balance of the secondary dispatching system. The present invention realizes the safe, economical and efficient operation and dispatching of the multi-energy complementary system, and realizes the coordinated supply of multiple energy forms and the comprehensive cascade utilization of energy.

Description

Technical Field

[0001] The present invention relates to the field of electric energy, and more specifically to a multi-energy complementary control system and method of a terminal integrated energy supply mode. Background Art

[0002] At present, my country is in a critical period of transformation from a traditional energy system to a modern energy system. The modern energy system advocates the construction of an energy system that is demand-driven, integrates multiple energy types, coordinates multiple energy supply methods, develops and shares multiple entities, and intelligently interacts between supply and demand. The transition from a traditional energy system to a modern energy system requires a thorough transformation in terms of energy structure, energy supply methods, and energy supply and demand relationships.

[0003] Wind energy and solar energy, as the most large-scale and commercially developed energy types among renewable energy, have developed rapidly in the past few years. However, as primary energy sources, they cannot be stored, and the electricity they generate has random, intermittent and anti-peak characteristics. Their large-scale integration into the power grid will make the operation and dispatching control of the power system difficult, which is also the fundamental reason why the problem of new energy power consumption in my country is becoming increasingly prominent. As the proportion of new energy power gradually increases, the impact of its random volatility on the system will undergo a qualitative change. The power system needs to achieve a balance between the supply and demand of energy between the randomly fluctuating load demand and the randomly fluctuating power supply, which will fundamentally change the structural form, operation control mode, planning, construction and management of the power system. This requires us to innovate control and optimization theoretical methods on the basis of in-depth understanding of the current new energy situation to solve the problem of large-scale consumption of new energy power.

[0004] Multi-energy complementation breaks the single energy supply model and provides users with comprehensive energy services, thereby improving the comprehensive utilization efficiency of the energy system, alleviating the contradiction between energy supply and demand, and achieving better environmental benefits. This is the general trend of future energy development. Vigorously developing multi-energy complementary integrated optimization systems is one of the effective means to solve the practical problems of wind, solar, and water abandonment in my country's energy and power development.

[0005] Up to now, due to the limited implementation time of the first batch of multi-energy complementary demonstration projects and the need to be implemented in steps, not all of them have been completed and put into production. There is no unified conclusion on the overall architecture of the multi-energy complementary control system, and the multi-energy complementary control system technology has not been verified. Relevant research will continue.

[0006] Therefore, the art still lacks a practical and sound multi-energy complementary control system with terminal integrated energy supply mode. Summary of the invention

[0007] The purpose of the present invention is to provide a multi-energy complementary control system and method for a terminal integrated energy supply mode. In order to alleviate the contradiction between energy supply and demand and solve the problem of the increasing rate of wind and solar power abandonment, multi-energy complementary technology is becoming more and more popular and gradually becoming an important solution to the above-mentioned problems. As the core technology of multi-energy complementary technology, the research on multi-energy complementary control system will directly affect the comprehensive benefits of the entire multi-energy complementary project. The multi-energy complementary control system of the present invention aims to build a reasonable hierarchical control system network structure for a multi-energy complementary system in a terminal integrated energy supply mode, so as to realize the safe, economical and efficient operation and scheduling of the multi-energy complementary system in a terminal integrated energy supply mode. The multi-energy complementary control system of the present invention is particularly suitable for energy supply systems in energy-intensive areas such as new towns, industrial parks, large public facilities (airports, stations, hospitals, schools, etc.), centralized residential areas, business districts and island areas, and can also exchange electricity with external power systems.

[0008] In a first aspect of the present invention, a multi-energy complementary control system of a terminal integrated energy supply mode is provided. Specifically, the multi-energy complementary control system includes a primary dispatching system of a power system and an internal multi-energy complementary secondary dispatching system; the internal multi-energy complementary secondary dispatching system includes a multi-energy flow energy management system, a gas turbine power generation control system, a distributed photovoltaic control system, a distributed fan control system, a ground source heat pump control system, a refrigeration unit control system, a power storage system control system, a cold storage system control system and a demand side load forecasting management system; the internal multi-energy complementary secondary dispatching system exchanges electric energy with an external power system through the primary dispatching system of the power system; the primary dispatching system of the power system performs comprehensive dispatching management on the internal multi-energy complementary secondary dispatching system as a whole according to the energy supply and energy balance between the external power system and the internal multi-energy complementary secondary dispatching system; in the internal multi-energy complementary secondary dispatching system, the multi-energy flow energy management system optimizes the dispatching and management of each energy supply system by matching the energy supply side and the demand side information, so as to achieve an effective balance of multiple energy forms such as electricity, heat and cold within the internal multi-energy complementary secondary dispatching system; the demand side load forecasting management system performs load forecasting and real-time monitoring of energy consumption on the user side within the multi-energy complementary control system.

[0009] In another preferred example, the multi-energy complementary control system forms a micro energy grid system.

[0010] In another preferred embodiment, the refrigeration unit is a bromination refrigeration unit.

[0011] In another preferred example, the internal multi-energy complementary secondary dispatching system also includes other auxiliary monitoring and management information systems, etc.

[0012] In another preferred example, the multi-energy complementary control system can supply power to the external power system, and the external power system can also supply power to the multi-energy complementary control system.

[0013] In another preferred example, the gas turbine power generation control system, the distributed photovoltaic control system, the distributed wind turbine control system, the ground source heat pump control system, the refrigeration unit control system, the power storage system control system and the cold storage system control system are respectively used to control their respective energy supply process systems.

[0014] In another preferred example, the gas turbine power generation control system, the distributed photovoltaic control system, the distributed wind turbine control system, the ground source heat pump control system, the refrigeration unit control system, the power storage system control system and the cold storage system control system are all equipped with independent DCS control systems or PLC control systems.

[0015] In another preferred example, the gas turbine power generation system adopts the DCS control system.

[0016] In another preferred example, the distributed photovoltaic control system and the distributed wind turbine control system adopt a DCS control system or a PLC control system.

[0017] In another preferred example, the ground source heat pump control system and the refrigeration unit control system adopt the PLC control system.

[0018] In another preferred example, the power storage system control system and the water storage system control system are equipped with local control devices.

[0019] In another preferred example, the gas turbine power generation control system, the distributed photovoltaic control system, the distributed fan control system, the ground source heat pump control system, the refrigeration unit control system, the power storage system control system and the cold storage system control system are partially or fully merged and controlled according to the complexity of the process system, the scale of control points and the physical layout.

[0020] In another preferred example, the DCS control system uniformly controls the gas turbine power generation control system, the distributed photovoltaic control system, the distributed wind turbine control system, the ground source heat pump control system, the refrigeration unit control system, the power storage system control system and the cold storage system control system.

[0021] In another preferred example, the DCS control system directly controls the gas turbine power generation system, the distributed photovoltaic, distributed wind turbine, ground source heat pump, refrigeration unit, power storage system, cold storage system, etc. as a remote control station and is incorporated into the DCS for centralized control.

[0022] In another preferred example, when the distributed photovoltaic, distributed wind turbine, ground source heat pump, lithium bromide refrigeration unit, power storage system and cold storage system are arranged near the gas turbine power generation system, they are directly controlled by the control system of the gas turbine power generation system.

[0023] In another preferred example, when the distributed photovoltaic, distributed wind turbine, geothermal heat pump, lithium bromide refrigeration unit, power storage system and cold storage system are arranged far away from the gas turbine power generation system, the control system of the gas turbine power generation system controls the operation of the distributed photovoltaic, distributed wind turbine, geothermal heat pump, lithium bromide refrigeration unit, power storage system and cold storage system through a remote control station / remote control cabinet.

[0024] In another preferred embodiment, the user is provided with an intelligent measuring instrument (such as an electricity meter, a water meter, a flow meter or a three-meter integrated reading, etc.) for monitoring energy usage.

[0025] In another preferred example, the gas turbine power generation system includes a gas-steam combined cycle system and an optional gas boiler system.

[0026] In another preferred embodiment, the rated power of the gas turbine cogeneration system is 30,000-200,000 kilowatts.

[0027] In another preferred embodiment, each of the subsystems is provided with a remote terminal unit (RTU) and a feeder terminal unit (FTU) for collecting data.

[0028] In another preferred example, the remote control device includes a remote terminal unit (RTU) and a feeder terminal unit (FTU).

[0029] In a second aspect of the present invention, a multi-energy complementary control method of a terminal integrated energy supply mode is provided. Specifically, the method comprises:

[0030] a) providing a multi-energy complementary control system as claimed in claim 1, and the multi-energy complementary control system is connected to the external power system;

[0031] b) the first-level dispatching system performs comprehensive dispatching management on the internal multi-energy complementary second-level dispatching system as a whole according to the energy supply and energy consumption balance between the external power system and the internal multi-energy complementary second-level dispatching system;

[0032] c) The internal multi-energy complementary secondary dispatching system optimizes the dispatching and management of the operation of the gas turbine power generation control system, the distributed photovoltaic control system, the distributed wind turbine control system, the ground source heat pump control system, the refrigeration unit control system, the power storage system control system and the cold storage system control system and the energy consumption on the demand side by matching the information on the supply side and the demand side, and adjusts the internal energy of the multi-energy complementary control system to be in a state of supply and demand balance.

[0033] It should be understood that within the scope of the present invention, the above-mentioned technical features of the present invention and the technical features specifically described below (such as embodiments) can be combined with each other to form a new or preferred technical solution. Due to space limitations, they will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a schematic diagram of two-level interactive scheduling of a multi-energy complementary control system in an example of the present invention.

[0036] Figure 2 It is a schematic diagram of energy utilization of an internal multi-energy complementary secondary scheduling system in an example of the present invention.

[0037] Figure 3 It is a network structure diagram of a multi-energy complementary control system in an example of the present invention.

[0038] In the accompanying drawings, the markings are as follows:

[0039] 1- Gas turbine power generation control system;

[0040] 2-Distributed photovoltaic control system;

[0041] 3-Distributed fan control system;

[0042] 4- Refrigeration unit control system;

[0043] 5-Multi-energy flow energy management system;

[0044] 6- Power system;

[0045] 7-User side. DETAILED DESCRIPTION

[0046] After extensive and in-depth research and a large number of screenings, the inventors have developed for the first time a multi-energy complementary control system and method for a terminal integrated energy supply mode. Since the multi-energy complementary system of the terminal integrated energy supply mode was just publicly promoted and implemented by the National Energy Administration in 2017, and related projects are being implemented in steps, no multi-energy complementary project has been truly built and put into production, and there is no unified conclusion on the overall architecture of the multi-energy complementary control system, and the multi-energy complementary control system technology has not yet been verified. Related research will continue. Therefore, the present invention aims to provide a multi-energy complementary control system and method for a terminal integrated energy supply mode to point out the direction for industry development and promote the implementation of the national multi-energy complementary system policy as a demonstration project. The multi-energy complementary control system of the present invention integrates and utilizes natural gas, solar energy, wind energy, geothermal energy and other energy sources at the terminal, and reasonably regulates the utilization of various energy sources at the terminal according to the external power grid demand and the energy demand of surrounding users, so as to realize the safe, economical and efficient operation and scheduling of the multi-energy complementary system of the terminal integrated energy supply mode, and completes the present invention on this basis.

[0047] the term

[0048] As used in this article, the term "multi-energy complementarity" refers to a way of using energy that adopts multiple energy sources to complement each other according to different resource conditions and energy users, so as to alleviate the contradiction between energy supply and demand, reasonably protect natural resources, and promote a virtuous cycle of the ecological environment.

[0049] As used in this article, the term "terminal integrated energy supply system" means that the terminal integrated energy supply system is oriented to the terminal users' various energy needs such as electricity, heat, cooling, gas, etc., and it adapts to local conditions, coordinates the development, and complements the use of traditional energy and new energy. It optimizes the layout and construction of integrated integrated energy supply infrastructure, and realizes multi-energy coordinated supply and comprehensive cascade utilization of energy through natural gas trigeneration of heat, electricity and cooling, distributed renewable energy and energy smart microgrids.

[0050] As used in this article, the term "power system primary dispatching system" can be referred to as the "primary dispatching system" for short; the term "internal multi-energy complementary secondary dispatching system" can be referred to as the "secondary dispatching system" for short.

[0051] The present invention provides a multi-energy complementary control system and method of a terminal integrated energy supply mode, which is a multi-energy complementary control system with a specific structure.

[0052] Typically, the multi-energy complementary control system of the present invention includes wind, light, gas, cold, heat (hot water, hot steam), electricity and other energy types, and is converted into energy forms by trigeneration system, distributed photovoltaic, distributed wind turbine, solar thermal collection system, ground source heat pump and energy storage device, etc., to achieve energy interconnection and mutual compensation, and give full play to the multi-energy complementary effect in the region. At the same time, the microgrid formed by the multi-energy complementary control system can be connected to the public power grid, and the power grid can be used to supplement the purchase of electricity or sell electricity to the power grid. Of course, according to the end-user situation, resource situation and characteristics of each project in the construction area of ​​the multi-energy complementary system, the settings of the relevant systems and equipment in the system can be appropriately adjusted to load the actual needs of each project.

[0053] It should be noted that the objects of the multi-energy complementary control system include: gas turbine power generation system, distributed photovoltaic, distributed wind turbine, ground source heat pump, lithium bromide refrigeration unit, power storage system, cold storage system, demand-side energy load, etc. The above energy supply system and demand-side energy load are collectively referred to as "multi-energy complementary system".

[0054] In this microgrid, the main primary energy inputs are natural gas, solar energy, wind energy and geothermal energy, among which:

[0055] (1) The gas turbine cogeneration system consumes natural gas to generate electricity and waste heat, which can be used directly for heating or converted for cooling;

[0056] (2) Distributed photovoltaics absorb light energy, which can generate electricity and provide heat. The electricity generated can be converted into cooling and heating through heat pumps;

[0057] (3) Distributed wind turbines absorb wind energy, which can be used to generate electricity or to provide cooling or heating through heat pumps;

[0058] (4) Ground source heat pumps consume electricity to supply cooling and heating loads, mainly playing the role of cooling and heating peak load regulation;

[0059] (5) The chiller consumes electricity and supplies cooling load. It can bear the base load and also play a role in cooling peak load regulation.

[0060] (6) Energy storage equipment (hydroelectric storage) stores short-term excess energy and releases it when the load increases;

[0061] (7) Energy storage devices (batteries) store short-term excess energy and release it when the electrical load increases. They can also be used exclusively by charging stations to play a role in peak load reduction and valley load filling.

[0062] In the terminal integrated energy supply system, renewable resources such as solar energy and wind energy, and the combined heat, cooling and power system fueled by natural gas can make full use of various available and decentralized energy sources, have flexible and decentralized locations, adapt to decentralized power demand and resource distribution, and serve as backup for the large power grid, improve power supply reliability, easily meet load demand, and facilitate efficient and large-scale utilization of renewable energy. However, distributed power sources also have many disadvantages for large power grids, such as high single-machine access cost, difficult control, system failure and exit from operation, intermittent impact on surrounding users, and difficulty in comprehensive energy optimization, which pose challenges to the operation and dispatch of power grids. In order to coordinate the contradictions between large power grids and distributed power sources, and make full use of the value and benefits that distributed power sources bring to power grids and users, building a microgrid inside the terminal integrated energy supply system can provide a better solution. At the grid dispatching level, the microgrid participates in the economic operation and dispatching of the large power grid as a whole, providing effective support for the large power grid; at the internal control level of the microgrid, through the interface between the microgrid and the large power grid, it interacts with the grid dispatching layer to achieve optimized control of each distributed power source, energy storage, and load side in the microgrid, thereby achieving stable operation of the entire microgrid.

[0063] From the above analysis, it can be seen that the multi-energy complementary control system is suitable for the overall control scheme of two-level interactive dispatch, which are the first-level dispatch of the power system and the internal multi-energy complementary second-level dispatch. Among them, the first-level dispatch of the power system: the multi-energy complementary control system, as a whole, is connected to the large power system like other traditional power plants. According to the load forecast value, it accepts the unified dispatch of the power system dispatch center to reasonably allocate the output of traditional units and the output of the multi-energy complementary control system. Secondary dispatch within the multi-energy complementary control system: After completing the first-level dispatch, the task of the second-level dispatch is to reasonably allocate the output of the multi-energy complementary control system to each distributed energy station control system. At the same time, it is also necessary to achieve a balance between the supply and demand of various energy sources such as electricity, heat, and cold within the multi-energy complementary control system.

[0064] Within the multi-energy complementary control system, distributed energy stations such as gas turbine units, distributed photovoltaics, distributed fans, ground-source heat pumps, chillers, energy storage equipment (water storage), and energy storage equipment (batteries) are equipped with independent DCS, PLC control systems or other control devices according to their own scale and the characteristics of the unit's process system. In traditional energy station construction projects, gas turbine units are generally controlled by DCS, distributed photovoltaics and distributed fans can be controlled by DCS or PLC, ground-source heat pumps and chillers are generally controlled by PLC, and energy storage equipment (water storage) and energy storage equipment (batteries) have their own local control devices. As a multi-energy complementary integrated optimization project, DCS can be uniformly used for centralized control of each distributed energy station, and the DCS of the entire plant can complete the centralized monitoring, start and stop, operation, interlocking, protection and other functions of gas turbine units and other distributed energy stations.

[0065] In order to realize the comprehensive dispatch and management of various energy situations, on the basis of the basic control of the above-mentioned distributed energy stations, a multi-energy flow energy management system (IEMS) should be set up to carry out the comprehensive dispatch and management of various energy forms such as electricity, heat, and cold in the terminal integrated energy supply system. IEMS can coordinate the distributed energy stations, energy storage systems, and load-side equipment in the terminal integrated energy supply system according to the load demand of cold, heat, electricity, weather conditions, electricity prices, gas prices and other information, and carry out comprehensive dispatch decision-making management and control of the multi-energy complementary control system to ensure the safe, stable and economical operation of the multi-energy complementary control system and improve the energy quality and energy supply and demand balance of the multi-energy complementary control system.

[0066] Arrange RTU, FTU and other devices at all other plants, distributed photovoltaic, substations, energy storage, etc. to collect data such as voltage, current, active power, reactive power, etc. Install intelligent measuring instruments (such as electricity meters, water meters, flow meters or three-meter centralized reading, etc.) at the user to monitor the user's side electricity, heat, cold and other load data in real time. The above collected data can be transferred to IEMS through the gas turbine DCS system or directly sent to IEMS, and finally realize the comprehensive management and dispatch of energy on the internal supply and demand side of multi-energy complementarity in the IEMS system.

[0067] The main advantages of the present invention include:

[0068] (a) Fill the gaps in this field and form a standardized solution;

[0069] (b) Through the two-level dispatching method, the multi-energy complementary system of the terminal integrated energy supply system can be packaged into a whole for dispatching and management, thereby improving the power supply quality and reliability to the external large power system and reducing the impact and adverse effects of intermittent power generation methods such as photovoltaics and wind turbines;

[0070] (c) To ensure the safe, stable and economical operation of the multi-energy complementary system and improve the energy quality and energy supply and demand balance of the multi-energy complementary system through the first-level comprehensive dispatch decision-making management and control of the multi-energy complementary system;

[0071] (d) Through the internal secondary dispatching multi-energy flow energy management of the multi-energy complementary system, the complementary characteristics between distributed energy stations can be fully utilized, which brings convenience to the comprehensive management and dispatching of the entire energy and improves the comprehensive utilization efficiency of energy;

[0072] (e) Comprehensively utilize various energy sources to ensure energy supply.

[0073] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, the accompanying drawings are schematic diagrams, so the device and apparatus of the present invention are not limited by the size or ratio of the schematic diagrams.

[0074] It should be noted that in the claims and description of this patent, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0075] Example

[0076] The multi-energy complementary control system and method of the terminal integrated energy supply mode of this embodiment are as follows: Figure 1-3 As shown. The multi-energy complementary control system is connected to the external power system and surrounding users, and it includes a primary dispatching system of the power system and an internal multi-energy complementary secondary dispatching system. The multi-energy complementary control system regulates the power transmission and cooling and heating loads of the multi-energy complementary system according to the power load demand of the external power system 6 and the energy demand of the user side 7 (including power load demand and cooling and heating load demand). Some traditional power plants (for example: thermal power plants, nuclear power plants, thermal power plants, etc.) are connected to the external power system 6, which plays a major role in regulating the power transmission and distribution of the power grid.

[0077] The internal multi-energy complementary secondary dispatching system includes a multi-energy flow energy management system 5, a gas turbine power generation control system 1, a distributed photovoltaic control system 2, a distributed fan control system 3, a ground source heat pump control system, a refrigeration unit control system 4, a power storage system control system, a cold storage system control system and a demand side load forecasting management system. The internal multi-energy complementary secondary dispatching system exchanges electric energy with the external power system 6 through the power system primary dispatching system. The power system primary dispatching system performs comprehensive dispatching management on the internal multi-energy complementary secondary dispatching system as a whole according to the energy supply and energy balance between the external power system and the internal multi-energy complementary secondary dispatching system. The multi-energy flow energy management system 5 optimizes the dispatching and management of each energy supply system by matching the energy supply side (gas turbine power generation system, distributed photovoltaic, distributed fan, ground source heat pump, refrigeration unit, power storage system, cold storage system, etc.) and the demand side 7 information, and realizes the effective balance of multiple energy forms such as electricity, heat, and cold in the internal multi-energy complementary secondary dispatching system. The demand side load forecasting management system performs load forecasting and real-time monitoring of energy consumption on the user side of the multi-energy complementary control system.

[0078] A microgrid system is formed inside the multi-energy complementary control system. The microgrid as a whole participates in the economic operation and dispatching of the large power grid, providing effective support for the large power grid; at the internal control level of the microgrid, through the interface between the microgrid and the large power grid, it interacts with the grid dispatching layer to achieve optimized control of the distributed power sources, energy storage, and load side in the microgrid, thereby achieving stable operation of the entire microgrid.

[0079] In this microgrid, the main primary energy inputs are natural gas, solar energy, wind energy and geothermal energy, among which Figure 2 As shown, the gas turbine combined supply system consumes natural gas, generates electricity through generators, and generates waste heat through waste heat recovery systems including waste heat boilers. The waste heat can be directly used for heating or converted to cooling through absorption refrigerators or other equipment; gas boilers generate heat by burning natural gas and can directly provide heat; distributed photovoltaics absorb light energy, which can generate electricity or provide heat through solar thermal collection systems, and the electricity generated can be converted to cooling and heating through heat pumps; distributed fans absorb wind energy, which can generate electricity or provide cooling and heating through heat pumps; ground source heat pumps consume electricity to supply cold and hot loads, mainly playing the role of cold and hot peak regulation; chillers consume electricity to supply cold loads, which can bear basic loads or play the role of cold peak regulation; energy storage equipment (water storage) stores short-term excess energy and releases it when the load increases; energy storage equipment (battery) stores short-term excess energy and releases it when the electric load increases, and can also be used exclusively for charging stations, playing the role of peak shaving and valley filling. PCC power exchange can also be set up in this microgrid as a public connection point for multiple partial power connections.

[0080] The gas turbine power generation control system, distributed photovoltaic control system, distributed fan control system, ground source heat pump control system, refrigeration unit control system, power storage system control system and cold storage system control system are all equipped with independent DCS control systems or PLC control systems. Specifically, the gas turbine power generation control system adopts a DCS control system. The distributed photovoltaic control system and the distributed fan control system adopt a DCS control system or a PLC control system. The ground source heat pump control system and the chiller control system adopt a PLC control system. The power storage system and the water storage system have their own local control devices.

[0081] The multi-energy flow energy management system controls each energy supply system separately. In another preferred embodiment, the multi-energy flow energy management system directly controls the gas turbine power generation control system, and the gas turbine power generation control system controls each other energy supply system (when other energy supply systems are set far away from the gas turbine power generation control system, other energy supply systems need to be equipped with remote control equipment, and the gas turbine power generation control system controls the operation of subsystems through the remote control equipment of each energy supply system). The remote control equipment is used to collect data, including remote terminal units (RTUs) and feeder terminal units (FTUs).

[0082] The multi-energy complementary control system of this embodiment can supply power to the external power system, and the external power system can also supply power to the multi-energy complementary control system. The external power system is also connected to other traditional power plants (such as thermal power plants, nuclear power plants, and hydropower plants, etc.).

[0083] The user side is equipped with intelligent measuring instruments (such as electricity meter, water meter, flow meter or three-meter integrated reading, etc.) for monitoring energy consumption.

[0084] The gas turbine power generation control system includes a gas-steam combined cycle system and a gas boiler system. The rated power of the gas-steam combined cycle system is 30,000-200,000 kilowatts, for example, 50,000 kilowatts, 100,000 kilowatts, etc.

[0085] All documents mentioned in the present invention are cited as references in this application, just as each document is cited as reference individually. In addition, it should be understood that after reading the above teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A multi-energy complementary control system with terminal integrated energy supply mode, characterized in that: The multi-energy complementary control system includes a primary dispatching system of the power system and a secondary dispatching system of the internal multi-energy complementary system; The internal multi-energy complementary secondary dispatching system includes a multi-energy flow energy management system, a gas turbine power generation control system, a distributed photovoltaic control system, a distributed fan control system, a ground source heat pump control system, a refrigeration unit control system, a power storage system control system, a cold storage system control system and a demand side load forecasting management system; the gas turbine power generation control system, the distributed photovoltaic control system, the distributed fan control system, the ground source heat pump control system, the refrigeration unit control system, the power storage system control system and the cold storage system control system are respectively used to control their respective energy supply process systems; wherein the gas turbine combined supply system consumes natural gas, generates electricity through a generator, and generates waste heat through a waste heat recovery system including a waste heat boiler. Waste heat can be used for direct heating or converted into cooling through absorption chillers or other equipment; gas boilers can generate heat by burning natural gas and can directly provide heating; distributed photovoltaics absorb light energy, or generate electricity, or provide heat through solar thermal collection systems, and the electricity generated can be converted into cooling and heating through heat pumps; distributed fans absorb wind energy, or generate electricity, or provide cooling and heating through heat pumps; ground source heat pumps consume electricity to supply cold and hot loads and perform cold and hot peak regulation; chillers consume electricity to supply cold loads, or bear loads, or are used for cold peak regulation; water storage equipment stores short-term excess energy and releases it when the load increases; battery storage equipment stores short-term excess energy and releases it when the electrical load increases, or is used exclusively for charging stations to reduce peak loads; The gas turbine power generation system includes a gas-steam combined cycle system and an optional gas boiler system; the rated power of the gas turbine power generation system is 30,000-200,000 kilowatts; The internal multi-energy complementary secondary dispatching system exchanges electric energy with the external power system through the power system primary dispatching system; The power system primary dispatching system performs comprehensive dispatching management on the internal multi-energy complementary secondary dispatching system as a whole according to the energy supply and energy consumption balance between the external power system and the internal multi-energy complementary secondary dispatching system; In the internal multi-energy complementary secondary dispatching system, the multi-energy flow energy management system optimizes the dispatching and management of each energy supply system by matching the information on the energy supply side and the demand side; the demand side load forecasting management system performs load forecasting and real-time monitoring of energy usage on the user side within the multi-energy complementary control system; The multi-energy complementary control system is controlled by the primary dispatching of the power system and the secondary dispatching of the internal multi-energy complementary control system; Among them, the first-level dispatching of the power system is that the multi-energy complementary control system is connected to the large power system as a whole, and accepts the unified dispatching of the power system dispatching center according to the load forecast value, and reasonably distributes the output of traditional units and the output of the multi-energy complementary control system; the second-level dispatching within the multi-energy complementary control system is to reasonably distribute the output of the multi-energy complementary control system to each distributed energy station control system after completing the first-level dispatching, so that the supply and demand of multiple energy sources such as electricity, heat and cold within the multi-energy complementary control system can be balanced; The multi-energy complementary control system can supply power to the external power system, and the external power system can also supply power to the multi-energy complementary control system; The DCS control system directly controls the gas turbine power generation system, and the distributed photovoltaic, distributed wind turbine, ground source heat pump, refrigeration unit, power storage system, and cold storage system are included in the DCS as remote control stations for centralized control; When the distributed photovoltaic, distributed wind turbine, ground source heat pump, lithium bromide refrigeration unit, power storage system and cold storage system are arranged near the gas turbine power generation system, they are directly controlled by the control system of the gas turbine power generation system; When the distributed photovoltaic, distributed wind turbine, ground source heat pump, lithium bromide refrigeration unit, power storage system and cold storage system are arranged far away from the gas turbine power generation system, the control system of the gas turbine power generation system controls the operation of the distributed photovoltaic, distributed wind turbine, ground source heat pump, lithium bromide refrigeration unit, power storage system and cold storage system through a remote control station / remote control cabinet.

2. The multi-energy complementary control system according to claim 1, characterized in that: The refrigeration unit is a bromide refrigeration unit.

3. The multi-energy complementary control system according to claim 1, characterized in that: The gas turbine power generation control system, the distributed photovoltaic control system, the distributed fan control system, the ground source heat pump control system, the refrigeration unit control system, the power storage system control system and the cold storage system control system are all equipped with independent DCS control systems or PLC control systems.

4. The multi-energy complementary control system according to claim 3, characterized in that: The gas turbine power generation control system adopts a DCS control system.

5. The multi-energy complementary control system according to claim 3, characterized in that: The distributed photovoltaic control system and the distributed wind turbine control system adopt a DCS control system or a PLC control system.

6. The multi-energy complementary control system according to claim 3, characterized in that: The ground source heat pump control system and the refrigeration unit control system adopt a PLC control system.

7. The multi-energy complementary control system according to claim 3, characterized in that: The power storage system control system and the cold storage system control system are provided with local control devices.

8. The multi-energy complementary control system according to claim 1, characterized in that: The user is provided with an intelligent measuring instrument for monitoring energy usage conditions.

9. The multi-energy complementary control system according to claim 1, characterized in that: Each subsystem is equipped with remote terminal equipment and feeder terminal equipment for collecting data.

10. A multi-energy complementary control method for a terminal integrated energy supply mode, characterized in that: The method comprises: a) providing a multi-energy complementary control system as claimed in claim 1, and the multi-energy complementary control system is connected to the external power system; b) the first-level dispatching system performs comprehensive dispatching management on the internal multi-energy complementary second-level dispatching system as a whole according to the energy supply and energy consumption balance between the external power system and the internal multi-energy complementary second-level dispatching system; c) The internal multi-energy complementary secondary dispatching system optimizes the dispatching and management of the operation of the gas turbine power generation control system, the distributed photovoltaic control system, the distributed wind turbine control system, the ground source heat pump control system, the refrigeration unit control system, the power storage system control system and the cold storage system control system and the energy consumption on the demand side by matching the information on the supply side and the demand side, and adjusts the internal energy of the multi-energy complementary control system to be in a state of supply and demand balance.

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