Comprehensive energy service optimization control system based on multi-energy flow coupling

Abstract

The invention relates to the technical field of energy control, in particular to a comprehensive energy service optimization control system based on multi-energy flow coupling. Three energy coupling supply modes of the air source heat pump, the electric boiler and the heat storage water tank are adopted to provide heat loads for the park winter user side, the operation states of the air source heat pump unit, the electric boiler and the heat storage water tank are controlled in a coordinated mode according to the park user side heat load demand change condition, multi-energy complementation and on-demand energy supply are achieved, and the energy utilization rate is increased. Meanwhile, the advantage of high energy efficiency of the air source heat pump unit is fully played, economical operation is achieved, and the comprehensive operation cost of the whole thermodynamic system in the park is reduced; according to the invention, a multi-coupling energy supply hierarchical coordination control strategy is adopted, the comprehensive energy management and control platform is divided into an intelligent central application layer, a control layer and an equipment layer, and a hierarchical coordination control strategy of park system hierarchical management and park system centralized coordination is adopted, so that integration and intellectualization of the whole park energy system are realized; and safe and economical operation of the park comprehensive energy system is ensured.

Description

Technical Field

[0001] The present invention relates to the field of energy control technology, and in particular to an integrated energy service optimization control system based on multi-energy flow coupling. Background Art

[0002] The world's energy is accelerating towards clean, efficient and low-carbon development, and natural gas and non-fossil energy have become the main direction of world energy development. We should adhere to the parallel development of economic development and environmental improvement, actively explore the construction of a modern energy system with carbon-free, electrification, distribution and digitalization as the main features and green electricity as the core, and build a clean, low-carbon, safe and efficient modern energy system.

[0003] In traditional energy systems, cooling / heating / electricity / gas are often designed, planned, operated and controlled independently of each other. Different energy supply and energy consumption system entities cannot be coordinated, cooperated and optimized as a whole, resulting in low overall energy utilization. Most parks have a single energy supply mode, mainly using electricity and gas to provide cooling and heating loads. The overall energy utilization rate is not high and the energy consumption is high. According to the national basic energy development strategy, the integrated energy system IES (Integrated Energy System) is taken as the development direction of the park's energy supply. With the purpose of achieving efficient energy utilization and renewable energy consumption, it is an integrated energy service system that organically coordinates energy production, transmission and distribution, and utilization. Its energy supply subsystems are highly coupled. By establishing a user-side load prediction model and realizing the optimized dispatch of the supply-side load of the integrated energy microgrid, it can effectively reduce fossil energy consumption and achieve optimal energy efficiency.

[0004] From the perspective of economic operation, traditional park integrated energy systems such as the invention patents CN105299733A and CN111174265B only use electric boilers as an energy supply method. Although they can optimize the operation control strategy of supporting equipment to achieve a certain economic operation, they still consume a large amount of electricity from the grid side and convert it into cooling and heating loads. They do not adopt the idea of ​​"valley heat storage, peak consumption, and multi-energy coupling to assist peak regulation" to reduce the cost expenditure caused by electricity consumption, and cannot achieve a truly integrated energy IES system to optimize economic operation and low-carbon operation.

[0005] From the control strategy aspect, the traditional park integrated energy systems such as the invention patents of CN105299733A and CN111174265B only use remote control or local start-up of equipment in the basic control system. The control cabinet only has a touch screen to display relevant variables such as system flow and temperature, or adopts an open-loop control strategy. When the system liquid level and pressure are lower or higher than the limit value, only the protection interlocking function works, which can easily cause system oscillation. The traditional closed-loop control strategy is adopted. This control strategy with differential regulation cannot achieve the fast and stable regulation function of the large lag system. Although an independent acquisition and control system is established, it only has basic functions such as data acquisition, uploading, and display, and does not have the functions of data processing, optimization, and utilization, as well as equipment fault prediction and diagnosis functions. The control system has a single functional structure, and does not realize the hierarchical coordinated control strategy of the integrated energy IES system. It cannot complete the distributed and centralized coordinated control of the energy supply side and the energy user side. The control function is not perfect, systematic, safe, economical, and intelligent. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art, thereby providing an integrated energy service optimization control system based on multi-energy flow coupling.

[0007] An integrated energy service optimization control system based on multi-energy flow coupling, including a control system equipment layer and an integrated energy management and control platform, wherein the integrated energy management and control platform is connected to the control system equipment layer and controls various devices within the control system equipment layer;

[0008] The control system equipment layer includes the supply-side air source heat pump unit, the supply-side electric boiler system, the supply-side hot water storage tank system, the supply-side heat network circulating water system, the user-side pipe network system and the photovoltaic system;

[0009] The supply-side air source heat pump unit is connected to the supply-side heat network circulating water system and the supply-side electric boiler system; the supply-side electric boiler system is also connected to the supply-side hot water storage tank system, the user-side pipe network system and the heating pipe network; the supply-side hot water storage tank system is also connected to the softened water make-up pipe network and the user-side pipe network system; the supply-side heat network circulating water system is also connected to the softened water pipe network and the electric boiler expansion water tank; the user-side pipe network system is also connected to the domestic hot water inlet pipe network system, the domestic hot water outlet pipe network system, the swimming pool hot water inlet pipe network system and the swimming pool hot water return pipe network system, and the photovoltaic system is communicatively connected to the comprehensive energy management and control platform.

[0010] Further, the supply-side air source heat pump unit includes a first air source heat pump and a second air source heat pump;

[0011] The water inlet ends of the first air source heat pump and the second air source heat pump are connected to the supply-side electric boiler system, and the return water ends of the first air source heat pump and the second air source heat pump are connected to the supply-side heat network circulating water system and the electric boiler expansion water tank, and the water inlet end and return water end of the first air source heat pump and the water inlet end and return water end of the second air source heat pump are correspondingly provided with a manual valve.

[0012] Further, the supply-side electric boiler system includes an electric hot water boiler, an electric boiler primary-side circulation pump group and a No. 1 plate heat exchanger;

[0013] The electric hot water boiler is connected to the electric boiler primary circulation pump group and the No. 3 interface of the No. 1 plate heat exchanger. A manual valve is arranged between the electric hot water boiler and the electric boiler primary circulation pump group. A manual valve is also arranged between the electric hot water boiler and the No. 3 interface of the No. 1 plate heat exchanger. The electric boiler primary side circulation pump group is also connected to the No. 1 interface of the No. 1 plate heat exchanger and a manual valve is also arranged between the two. The No. 3 interface and the No. 4 interface of the No. 1 plate heat exchanger are respectively connected to the electric valve F2 and the electric valve F3. The other end of the electric valve F2 is connected to the heating pipeline network, the supply side hot water storage tank system and the electric valve F1. The other end of the electric valve F1 is connected to the other end of the electric valve F3, the user side pipeline network system, the first air source heat pump and the water inlet end of the second air source heat pump.

[0014] Further, the supply-side hot water storage tank system includes a hot water storage tank and a hot water storage tank circulation pump group;

[0015] The hot water storage tank is connected to the softened water feed pipe and one end of the electric valve F5, and manual valves are respectively provided between the hot water storage tank, the softened water feed pipe and the electric valve F5 and at the water outlet of the hot water storage tank. The other end of the electric valve F5 is connected to one end of the electric valve F4 and one end of the electric valve F6. The other end of the electric valve F6 is connected to one end of the hot water storage tank circulating pump group. The other end of the hot water storage tank circulating pump group is connected in parallel with the other end of the electric valve F4 and is connected to the heating pipe network, the other end of the electric valve F2, one end of the electric valve F1 and the user-side pipe network system.

[0016] Furthermore, the user-side pipe network system includes a No. 2 plate heat exchanger, a No. 3 plate heat exchanger, a domestic hot water pipe network system, a swimming pool hot water pipe network system and a heating pipe network system;

[0017] Interface No. 1 of plate heat exchanger No. 2 and interface No. 1 of plate heat exchanger No. 3 are connected to the parallel connection of the hot water tank circulation pump group and electric valve F4, interface No. 3 of plate heat exchanger No. 2 and interface No. 3 of plate heat exchanger No. 3 are connected to the heating pipe network system, interface No. 2 and interface No. 4 of plate heat exchanger No. 2 are respectively connected to the water inlet and return outlet of the domestic hot water pipe network system, and interface No. 2 and interface No. 4 of plate heat exchanger No. 3 are respectively connected to the water inlet and water outlet of the swimming pool hot water pipe network system.

[0018] Furthermore, the supply-side heat network circulating water system includes a softened water tank and a heat network circulating water replenishment pump group;

[0019] One end of the heat network circulating water make-up pump group is connected to the softened water tank, and the other end of the heat network circulating water make-up pump group is connected to the return water end of the electric boiler expansion water tank, the first air source heat pump and the second air source heat pump. The softened water tank is also connected to the softened water pipeline network. Manual valves are provided at one end of the softened water tank connected to the heat network circulating water make-up pump and the water outlet end of the softened water tank.

[0020] Further, the photovoltaic system includes a data transmission device, a photovoltaic panel and a charging pile;

[0021] The photovoltaic panel converts light energy into electrical energy to power the charging pile, and the data transmission device is connected to the integrated energy management and control platform for communication.

[0022] Furthermore, the integrated energy management and control platform includes a smart hub application layer, a control layer, and a device layer;

[0023] The smart central application layer includes an engineer station + operator station and a smart energy management and control system. The engineer station + operator station is communicated with the smart energy management and control system, the smart energy management and control system is communicated with the photovoltaic system, the engineer station + operator station is communicated with the control layer, the control layer is communicated with the equipment layer, and the equipment layer is connected to the corresponding control equipment.

[0024] Furthermore, the control layer includes a PLC controller, a two-way isolation network gateway and a network active defense device. The two-way isolation network gateway and the network active defense device are communicatively connected to the engineer station + operator station and the smart energy management and control system. The PLC controller is communicatively connected to the engineer station + operator station, the smart energy management and control system and the equipment layer.

[0025] Furthermore, the equipment layer includes a water pump electrical control cabinet, a measuring transmitter, an electric boiler control cabinet, a heat storage tank control cabinet and an air source heat pump control cabinet, and the water pump electrical control cabinet, the measuring transmitter, the electric boiler control cabinet, the heat storage tank control cabinet and the air source heat pump control cabinet are all communicatively connected to the PLC controller.

[0026] The technical solution of the present invention has the following advantages:

[0027] 1. The technical solution provided by the present invention, from the aspects of the economic operation and energy supply of the park, adopts three energy coupling supply methods of air source heat pump, electric boiler and hot water storage tank to provide heat load for the user side of the park in winter. According to the changes in the heat load demand on the user side of the park, the operating status of the air source heat pump unit, electric boiler and hot water storage tank are coordinated and controlled to achieve multi-energy complementarity and supply energy on demand. At the same time, the high energy efficiency advantage of the air source heat pump unit is fully utilized, economical operation is achieved, and the comprehensive operating cost of the overall thermal system of the park is reduced.

[0028] 2. The technical solution provided by the present invention adopts a multi-coupled energy supply hierarchical coordination control strategy from the aspect of park control system and control strategy optimization, and divides the comprehensive energy management and control platform into intelligent central application layer, control layer and equipment layer. The core control concept is the hierarchical coordination control strategy of "park system hierarchical management" and "park system centralized coordination", which realizes the integration and intelligence of the entire park energy system and ensures the safe and economical operation of the park comprehensive energy system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural diagram of the equipment layer of the control system of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the comprehensive energy management control platform of the present invention;

[0032] Figure 3 Flowchart for data prediction. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] See also Figures 1 to 3 , an integrated energy service optimization control system based on multi-energy flow coupling, including a control system equipment layer and an integrated energy management and control platform, wherein the integrated energy management and control platform is connected to the control system equipment layer and controls various devices within the control system equipment layer;

[0038] The control system equipment layer includes the supply-side air source heat pump unit, the supply-side electric boiler system, the supply-side hot water storage tank system, the supply-side heat network circulating water system, the user-side pipe network system and the photovoltaic system; wherein the air source heat pump unit, the supply-side electric boiler system, the supply-side hot water storage tank system, the supply-side heat network circulating water system and the user-side pipe network system are specifically connected through pipelines, and the specific components and connection relationships of each system are as follows:

[0039] The supply-side air source heat pump unit is connected to the supply-side heat network circulating water system and the supply-side electric boiler system; the supply-side electric boiler system is also connected to the supply-side hot water storage tank system, the user-side pipe network system and the heating pipe network; the supply-side hot water storage tank system is also connected to the softened water make-up pipe network and the user-side pipe network system; the supply-side heat network circulating water system is also connected to the softened water pipe network and the electric boiler expansion water tank; the user-side pipe network system is also connected to the domestic hot water inlet pipe network system, the domestic hot water outlet pipe network system, the swimming pool hot water inlet pipe network system and the swimming pool hot water return pipe network system, and the photovoltaic system is communicatively connected to the comprehensive energy management and control platform.

[0040] The supply-side air source heat pump unit includes a first air source heat pump and a second air source heat pump;

[0041] The water inlet ends of the first air source heat pump and the second air source heat pump are connected to the supply-side electric boiler system, and the return water ends of the first air source heat pump and the second air source heat pump are connected to the supply-side heat network circulating water system and the electric boiler expansion water tank, and the water inlet end and return water end of the first air source heat pump and the water inlet end and return water end of the second air source heat pump are correspondingly provided with a manual valve.

[0042] The supply-side electric boiler system includes an electric hot water boiler, an electric boiler primary-side circulation pump group and a plate heat exchanger No. 1; interface No. 1, interface No. 2, interface No. 3 and interface No. 4 of the plate heat exchanger No. 1 correspond to ①, ②, ③ and ④ in the figure respectively.

[0043] The electric hot water boiler is connected to the electric boiler primary circulation pump group and the No. 3 interface of the No. 1 plate heat exchanger. A manual valve is arranged between the electric hot water boiler and the electric boiler primary circulation pump group. A manual valve is also arranged between the electric hot water boiler and the No. 3 interface of the No. 1 plate heat exchanger. The electric boiler primary side circulation pump group is also connected to the No. 1 interface of the No. 1 plate heat exchanger and a manual valve is also arranged between the two. The No. 3 interface and the No. 4 interface of the No. 1 plate heat exchanger are respectively connected to the electric valve F2 and the electric valve F3. The other end of the electric valve F2 is connected to the heating pipeline network, the supply side hot water storage tank system and the electric valve F1. The other end of the electric valve F1 is connected to the other end of the electric valve F3, the user side pipeline network system, the first air source heat pump and the water inlet end of the second air source heat pump.

[0044] The supply-side hot water storage tank system includes a hot water storage tank and a hot water storage tank circulation pump group;

[0045] The hot water storage tank is connected to the softened water feed pipe and one end of the electric valve F5, and manual valves are respectively provided between the hot water storage tank, the softened water feed pipe and the electric valve F5 and at the water outlet of the hot water storage tank. The other end of the electric valve F5 is connected to one end of the electric valve F4 and one end of the electric valve F6. The other end of the electric valve F6 is connected to one end of the hot water storage tank circulating pump group. The other end of the hot water storage tank circulating pump group is connected in parallel with the other end of the electric valve F4 and is connected to the heating pipe network, the other end of the electric valve F2, one end of the electric valve F1 and the user-side pipe network system.

[0046] The user-side pipe network system includes a No. 2 plate heat exchanger, a No. 3 plate heat exchanger, a domestic hot water pipe network system, a swimming pool hot water pipe network system, and a heating pipe network system; the interface arrangement of the No. 2 plate heat exchanger and the No. 3 plate heat exchanger is the same as that of the No. 1 plate heat exchanger;

[0047] Interface No. 1 of plate heat exchanger No. 2 and interface No. 1 of plate heat exchanger No. 3 are connected to the parallel connection of the hot water tank circulation pump group and electric valve F4, interface No. 3 of plate heat exchanger No. 2 and interface No. 3 of plate heat exchanger No. 3 are connected to the heating pipe network system, interface No. 2 and interface No. 4 of plate heat exchanger No. 2 are respectively connected to the water inlet and return outlet of the domestic hot water pipe network system, and interface No. 2 and interface No. 4 of plate heat exchanger No. 3 are respectively connected to the water inlet and water outlet of the swimming pool hot water pipe network system.

[0048] The supply-side heat network circulating water system includes a softened water tank and a heat network circulating water replenishment pump group;

[0049] One end of the heat network circulating water make-up pump group is connected to the softened water tank, and the other end of the heat network circulating water make-up pump group is connected to the return water end of the electric boiler expansion water tank, the first air source heat pump and the second air source heat pump. The softened water tank is also connected to the softened water pipeline network. Manual valves are provided at one end of the softened water tank connected to the heat network circulating water make-up pump and the water outlet end of the softened water tank.

[0050] The photovoltaic system includes a data transmission device, a photovoltaic panel and a charging pile;

[0051] The photovoltaic panel converts light energy into electrical energy to power the charging pile, and the data transmission device is connected to the integrated energy management and control platform for communication.

[0052] The technical solution of the present invention is based on the core control strategy of "valley storage and peak generation, multi-energy coupling auxiliary peak regulation". The system has two operation modes. Mode 1 is to operate according to the prediction instruction of the user-side heat load control by the intelligent central application layer, and mode 2 is to operate according to the current actual user-side heat load demand instruction. The first air heat source pump and the second air heat source pump in the present invention automatically determine the number of pump groups to start according to the load demand. After the air source heat pump unit on the supply side is started according to the control instruction, the electric valve F1 is opened, and then connected to the user-side pipe network system. The supply-side hot water storage tank system performs heat storage operation during the low heat load period, and the air source heat pump unit stores heat for it. During the heat storage operation, the electric valve F4 and the electric valve F5 are opened, and the electric valve F6 remains closed. After reaching the upper limit of the hot water storage tank liquid level, the electric valve F4 and the electric valve F5 are automatically closed to complete the heat storage process. When the user-side heat load of the system is at the peak or changes to the peak, the supply-side hot water storage tank system enters the auxiliary peak regulation mode, the electric valve F5 and the electric valve F6 are opened, and the hot water storage tank circulation pump group is started with variable frequency, and the frequency is automatically adjusted according to the load. When encountering extremely cold weather or the heat load demand on the user side reaches the set value, the supply-side electric boiler system enters the auxiliary peak-shaving mode, the electric valve F2 and electric valve F3 are opened, the electric boiler primary circulation pump group is started by frequency conversion, and the frequency is automatically adjusted according to the load, and the heat load peak-shaving is participated in through the various plate heat exchangers set. The supply-side heat network circulating water system circulates hot water and replenishes water to the pipeline network and various systems according to the water demand of the pipeline network and various systems. At the same time, the park is equipped with a photovoltaic system to power the new energy vehicle charging piles and carport lighting systems. The photovoltaic system is integrated into the park's comprehensive energy management and control platform through wireless transmission communication.

[0053] The integrated energy management and control platform in the system of the present application includes a smart hub application layer, a control layer and a device layer;

[0054] The smart central application layer includes an engineer station + operator station and a smart energy management and control system. The engineer station + operator station is communicated with the smart energy management and control system, the smart energy management and control system is communicated with the photovoltaic system, the engineer station + operator station is communicated with the control layer, the control layer is communicated with the equipment layer, and the equipment layer is connected to the corresponding control equipment.

[0055] The control layer includes a PLC controller, a two-way isolation network gateway and a network active defense device. The two-way isolation network gateway and the network active defense device are communicated with the engineer station + operator station and the smart energy management and control system. The PLC controller is communicated with the engineer station + operator station, the smart energy management and control system and the equipment layer.

[0056] The equipment layer includes a water pump electrical control cabinet, a measuring transmitter, an electric boiler control cabinet, a heat storage tank control cabinet and an air source heat pump control cabinet. The water pump electrical control cabinet, the measuring transmitter, the electric boiler control cabinet, the heat storage tank control cabinet and the air source heat pump control cabinet are all communicatively connected to the PLC controller.

[0057] In this application, the specific functions of the engineer station + operator station include big data analysis (intelligent load forecasting, intelligent load coordination and scheduling), data storage (storage and recording of front-end equipment energy consumption, energy distribution), front-end equipment fault warning and abnormality analysis. The core control idea is the hierarchical coordination control strategy of "hierarchical management of park systems" and "centralized coordination of park systems".

[0058] Big data analysis: The smart central application layer collects and processes data information such as the power of the park control system equipment, and uses historical heat load data and meteorological data to predict the load, and reasonably optimizes the load scheduling. When the heat load of the park system exceeds the limit and reaches the upper limit setting value, the PLC controller in the execution control layer of the park control system sends instructions to reduce the peak. The control goal of the smart central application layer under normal operating conditions is to ensure the balance of supply and demand of the park's heat load in winter, and to achieve economic operation of the park equipment layer while ensuring that the peak heat load of the park does not exceed the limit under the peak shaving demand. When the peak heat load of the park exceeds the limit under the peak shaving demand, the supply-side hot water storage tank system and the supply-side electric boiler system in the equipment layer of the park control system are called for auxiliary peak shaving through the management and control of the central application layer, and the adjustable resources are reasonably selected for peak shaving.

[0059] Implementation of intelligent load prediction and intelligent load coordination and scheduling functions: Based on the intelligent energy management and control system GUI of the central application layer, the data collection system collects meteorological data, historical data of user-side heat source demand and heating area of ​​the building, and stores the data in the intelligent energy management and control system GUI server of the central application layer through optical fiber communication, and then reads the load and meteorological training sample data, and performs dual BP neural network combined prediction model training iteration, relying on the training of sample data to seek the mapping relationship between data, so as to establish an accurate data prediction model, and the training results are applied to the prediction and verification of data. After verification, reasonable real-time data will continue the subsequent calculation; erroneous load data information is saved to the relevant storage unit so that managers can check the problem. After obtaining the predicted load data, the heat load demand set value is determined according to the predicted load data, and the central application layer intelligent energy management and control system GUI sends the control instructions to the equipment layer of the park control system through the execution control layer PLC controller to realize the heat load coordination and scheduling function, and effectively allocate the park heat source in advance.

[0060] Data storage: The field data collection device at the control system equipment layer of the park communicates data to the PLC controller at the control layer through serial ports and hard-wired communication, and uploads the data to the intelligent central application layer through optical fiber transmission to automatically analyze and store the data, use meteorological data to predict climate change, and combine expert databases and historical databases to achieve effective distribution of the park's heat source through intelligent load prediction and intelligent load coordination and scheduling functions. Intelligent data statistical analysis does not require human intervention. Managers only need to provide the system with the data required on a periodic basis. Through automated collection, statistical analysis can be automatically performed to form the data reports and analysis charts required by managers, thereby reducing the workload of managers in data statistical analysis, improving work efficiency, and reducing labor costs.

[0061] Front-end equipment fault warning and abnormal analysis: Based on big data analysis control and data storage, a control system equipment layer power consumption database is established to record the daily power consumption of each device in detail. Big data statistics can further improve the prediction accuracy of the daily power consumption of each device in the control system equipment layer. By analyzing abnormal power consumption devices, specific power-consuming equipment in the control system equipment layer can be repaired and fault warnings can be carried out in a timely manner to ensure the safe and stable operation of the overall system of the park.

[0062] The control layer of the present invention adopts a PLC controller to implement the issuance of logical instructions of the intelligent central application layer. The control logic is stored in the PLC controller, which can monitor various data such as on-site temperature, pressure, water, electricity, etc. in real time, monitor the energy efficiency of equipment and optimize it, and realize remote data collection and automatic control of on-site equipment instruments.

[0063] The water pump electrical control cabinet, measuring transmitter, electric boiler control cabinet, heat storage tank control cabinet and air source heat pump control cabinet on the equipment layer are connected to the corresponding systems on the control system equipment layer to form the front-end equipment to realize the operation of the overall thermal system of the park.

[0064] From the perspective of the park's economic operation and energy supply, the present invention adopts three energy coupling supply methods, namely, air source heat pump, electric boiler and water storage tank, to provide heat load for the park's user side in winter. According to the changes in the heat load demand on the park's user side, the operating status of the air source heat pump unit, electric boiler and water storage tank are coordinated and controlled to achieve multi-energy complementarity and supply energy on demand. At the same time, the high energy efficiency advantage of the air source heat pump unit is fully utilized, economical operation is achieved, and the comprehensive operating cost of the park's overall thermal system is reduced.

[0065] From the perspective of park control system and control strategy optimization, the present invention adopts a multi-coupled energy supply hierarchical coordination control strategy, dividing the comprehensive energy management and control platform into intelligent central application layer, control layer and equipment layer. The core control idea is the hierarchical coordination control strategy of "park system hierarchical management" and "park system centralized coordination", which realizes the integration and intelligence of the entire park energy system and ensures the safe and economical operation of the park's comprehensive energy system.

[0066] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A comprehensive energy service optimization control system based on multi-energy flow coupling, characterized in that: It includes the control system equipment layer and the integrated energy management and control platform. The integrated energy management and control platform is connected to the control system equipment layer and controls each device inside the control system equipment layer; The control system equipment layer includes the supply-side air source heat pump unit, the supply-side electric boiler system, the supply-side hot water storage tank system, the supply-side heat network circulating water system, the user-side pipe network system and the photovoltaic system; The supply-side air source heat pump unit is connected to the supply-side heat network circulating water system and the supply-side electric boiler system; the supply-side electric boiler system is also connected to the supply-side hot water storage tank system, the user-side pipe network system and the heating pipe network; the supply-side hot water storage tank system is also connected to the softened water make-up pipe network and the user-side pipe network system; the supply-side heat network circulating water system is also connected to the softened water pipe network and the electric boiler expansion water tank; the user-side pipe network system is also connected to the domestic hot water inlet pipe network system, the domestic hot water outlet pipe network system, the swimming pool hot water inlet pipe network system and the swimming pool hot water return pipe network system, and the photovoltaic system is communicatively connected to the comprehensive energy management and control platform.

2. The integrated energy service optimization control system based on multi-energy flow coupling according to claim 1 is characterized in that: The supply-side air source heat pump unit includes a first air source heat pump and a second air source heat pump; The water inlet ends of the first air source heat pump and the second air source heat pump are connected to the supply-side electric boiler system, and the return water ends of the first air source heat pump and the second air source heat pump are connected to the supply-side heat network circulating water system and the electric boiler expansion water tank, and the water inlet end and return water end of the first air source heat pump and the water inlet end and return water end of the second air source heat pump are correspondingly provided with a manual valve.

3. The integrated energy service optimization control system based on multi-energy flow coupling according to claim 2 is characterized in that: The supply-side electric boiler system includes an electric hot water boiler, an electric boiler primary-side circulation pump group and a No. 1 plate heat exchanger; The electric hot water boiler is connected to the electric boiler primary circulation pump group and the No. 3 interface of the No. 1 plate heat exchanger. A manual valve is arranged between the electric hot water boiler and the electric boiler primary circulation pump group. A manual valve is also arranged between the electric hot water boiler and the No. 3 interface of the No. 1 plate heat exchanger. The electric boiler primary side circulation pump group is also connected to the No. 1 interface of the No. 1 plate heat exchanger and a manual valve is also arranged between the two. The No. 3 interface and the No. 4 interface of the No. 1 plate heat exchanger are respectively connected to the electric valve F2 and the electric valve F3. The other end of the electric valve F2 is connected to the heating pipeline network, the supply side hot water storage tank system and the electric valve F1. The other end of the electric valve F1 is connected to the other end of the electric valve F3, the user side pipeline network system, the first air source heat pump and the water inlet end of the second air source heat pump.

4. The integrated energy service optimization control system based on multi-energy flow coupling according to claim 3 is characterized in that: The supply-side hot water storage tank system includes a hot water storage tank and a hot water storage tank circulation pump group; The hot water storage tank is connected to the softened water feed pipe and one end of the electric valve F5, and manual valves are respectively provided between the hot water storage tank, the softened water feed pipe and the electric valve F5 and at the water outlet of the hot water storage tank. The other end of the electric valve F5 is connected to one end of the electric valve F4 and one end of the electric valve F6. The other end of the electric valve F6 is connected to one end of the hot water storage tank circulating pump group. The other end of the hot water storage tank circulating pump group is connected in parallel with the other end of the electric valve F4 and is connected to the heating pipe network, the other end of the electric valve F2, one end of the electric valve F1 and the user-side pipe network system.

5. The integrated energy service optimization control system based on multi-energy flow coupling according to claim 4 is characterized in that: The user-side pipe network system includes a No. 2 plate heat exchanger, a No. 3 plate heat exchanger, a domestic hot water pipe network system, a swimming pool hot water pipe network system and a heating pipe network system; Interface No. 1 of plate heat exchanger No. 2 and interface No. 1 of plate heat exchanger No. 3 are connected to the parallel connection of the hot water tank circulation pump group and electric valve F4, interface No. 3 of plate heat exchanger No. 2 and interface No. 3 of plate heat exchanger No. 3 are connected to the heating pipe network system, interface No. 2 and interface No. 4 of plate heat exchanger No. 2 are respectively connected to the water inlet and return outlet of the domestic hot water pipe network system, and interface No. 2 and interface No. 4 of plate heat exchanger No. 3 are respectively connected to the water inlet and water outlet of the swimming pool hot water pipe network system.

6. The integrated energy service optimization control system based on multi-energy flow coupling according to claim 2 is characterized in that: The supply-side heat network circulating water system includes a softened water tank and a heat network circulating water replenishment pump group; One end of the heat network circulating water make-up pump group is connected to the softened water tank, and the other end of the heat network circulating water make-up pump group is connected to the return water end of the electric boiler expansion water tank, the first air source heat pump and the second air source heat pump. The softened water tank is also connected to the softened water pipeline network. Manual valves are provided at one end of the softened water tank connected to the heat network circulating water make-up pump and the water outlet end of the softened water tank.

7. The integrated energy service optimization control system based on multi-energy flow coupling according to claim 1 is characterized in that: The photovoltaic system includes a data transmission device, a photovoltaic panel and a charging pile; The photovoltaic panel converts light energy into electrical energy to power the charging pile, and the data transmission device is connected to the integrated energy management and control platform for communication.

8. The integrated energy service optimization control system based on multi-energy flow coupling according to claim 1 is characterized in that: The comprehensive energy management and control platform includes a smart hub application layer, a control layer and a device layer; The smart central application layer includes an engineer station + operator station and a smart energy management and control system. The engineer station + operator station is communicated with the smart energy management and control system, the smart energy management and control system is communicated with the photovoltaic system, the engineer station + operator station is communicated with the control layer, the control layer is communicated with the equipment layer, and the equipment layer is connected to the corresponding control equipment.

9. The integrated energy service optimization control system based on multi-energy flow coupling according to claim 8 is characterized in that: The control layer includes a PLC controller, a two-way isolation network gateway and a network active defense device. The two-way isolation network gateway and the network active defense device are communicated with the engineer station + operator station and the smart energy management and control system. The PLC controller is communicated with the engineer station + operator station, the smart energy management and control system and the equipment layer.

10. The integrated energy service optimization control system based on multi-energy flow coupling according to claim 8 is characterized in that: The equipment layer includes a water pump electrical control cabinet, a measuring transmitter, an electric boiler control cabinet, a heat storage tank control cabinet and an air source heat pump control cabinet. The water pump electrical control cabinet, the measuring transmitter, the electric boiler control cabinet, the heat storage tank control cabinet and the air source heat pump control cabinet are all communicatively connected to the PLC controller.

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