Heat supply pipe network and heat load allocation method of heat supply pipe network

Abstract

The invention provides a heat supply pipe network and a heat load allocation method of the heat supply pipe network, and belongs to the field of energy utilization. The heat supply pipe network comprises a plurality of direct heat supply energy stations, a combined heat and power supply energy station and an energy storage and peak regulation energy station which are arranged in a distributed mode. The direct heat supply energy stations, the combined heat and power supply energy station and the energy storage and peak regulation energy station are connected through hot water pipes to form the heat supply pipe network. According to the heat supply pipe network, through the direct heat supply energy station, the combined heat and power supply energy station and the energy storage peak regulation energy station which are arranged in a distributed mode, arrangement of long-distance heat supply pipelines is reduced, and cost is reduced; through cooperative work of multiple heat supply modes such as the direct heat supply energy station, the combined heat and power supply energy station and the energy storage peak regulation energy station, heat supply of the heat supply pipe network is not limited by the heat and power load regulation characteristics of the thermal power generating unit, and the heat supply efficiency is guaranteed through cooperative work of the multiple heat supply modes; and the variable load regulation capacity of the heat supply pipe network is ensured through the energy storage peak regulation energy station.

Description

Technical Field

[0001] The present invention relates to the field of energy utilization, and in particular to a thermal power network and a heat load allocation method for the thermal power network. Background Art

[0002] There are two main types of urban heating pipe networks in common use. One type uses a small boiler as a heat source to provide heating to the surrounding areas; the other type uses long-distance pipelines to connect large thermal power plants around towns and uses steam extraction from thermal power units to provide heating to urban users. The main problems with the former include: old and small boilers are not given enough attention, have low technical levels, and poor maintenance; coal-fired boilers have low thermal efficiency and low environmental protection levels; and gas-fired boilers have high fuel costs. The main problems with the latter are: poor thermal power load regulation capabilities, which reduce the deep peak regulation and rapid load change capabilities of thermal power plant units, and indirectly affect the access of new energy power generation to the power grid.

[0003] Based on this, the existing technology has the problems of low heating efficiency and poor variable load regulation capability when supplying heat to the thermal network. Summary of the invention

[0004] In order to solve the above-mentioned technical defects, the present invention provides a thermal pipeline network and a method for allocating the thermal pipeline network. The thermal pipeline network reduces the layout of long-distance thermal pipelines to reduce costs through the distributed arrangement of direct heat energy stations, combined heat and power energy stations and energy storage peak-shaving energy stations. In addition, multiple types of heating modes such as direct heat energy stations, combined heat and power energy stations and energy storage peak-shaving energy stations work together so that the heating of the thermal pipeline network is not limited by the thermal power load regulation characteristics of the thermal power units. The multiple types of heating modes work together to ensure the heating efficiency, and the variable load regulation capability of the thermal pipeline network is ensured through the energy storage peak-shaving energy stations.

[0005] The first aspect of the present invention provides a thermal network, comprising: a plurality of distributed direct heat energy stations, combined heat and power energy stations, and energy storage peak-shaving energy stations, wherein the direct heat energy stations, combined heat and power energy stations, and energy storage peak-shaving energy stations are connected through hot water pipes to form a thermal network;

[0006] The direct heat energy station comprises: a first pulverized coal boiler, which is used to heat the water in the heat network by using the steam generated by the first pulverized coal boiler;

[0007] The cogeneration energy station comprises: a second pulverized coal boiler and a back-pressure generator set, which is used to utilize the steam generated by the second pulverized coal boiler to enter the back-pressure generator set to perform work, and heat the hot network water through the exhaust steam generated by the back-pressure generator set;

[0008] The energy storage and peak-shaving energy station includes: a third pulverized coal boiler and a heat storage device, which is used to use one path of steam generated by the third pulverized coal boiler to heat the hot network water when in a low-load operating state, and use another path of steam generated by the third pulverized coal boiler to enter the heat storage device to store steam heat; when in a high-load operating state, all the steam generated by the third pulverized coal boiler is used to heat the hot network water, and at the same time, the steam heat stored in the heat storage device is used to heat the hot network water.

[0009] In an embodiment of the present invention, the first pulverized coal boiler, the second pulverized coal boiler and the third pulverized coal boiler all adopt an L-shaped furnace, the thermal efficiency of the first pulverized coal boiler, the second pulverized coal boiler and the third pulverized coal boiler is greater than a preset efficiency value, and the original NOx emission concentration of the first pulverized coal boiler, the second pulverized coal boiler and the third pulverized coal boiler is less than a preset emission concentration value.

[0010] In the embodiment of the present invention, the thermal network further comprises: a centralized control center;

[0011] The centralized control center allocates heat load to the direct heat energy station, the combined heat and power energy station, and the energy storage peak-shaving energy station according to the user's heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler, the fuel calorific value and thermal efficiency of the second pulverized coal boiler, and the fuel calorific value and thermal efficiency of the third pulverized coal boiler.

[0012] In an embodiment of the present invention, the centralized control center is also used to dispatch the energy storage peak-shaving energy station to adjust the heat load when the change rate of the user's heat load value exceeds a preset change rate; when the adjustment capacity of the energy storage peak-shaving energy station to adjust the heat load does not meet the adjustment demand, the direct heat supply energy station is dispatched to adjust the heat load.

[0013] In an embodiment of the present invention, the thermal network further comprises: a monitoring module;

[0014] The monitoring module is used to monitor the real-time operation data of each device in the thermal network, and send the monitored real-time operation data of each device to the centralized control center;

[0015] The centralized control center determines whether there is any abnormality in each device of the thermal network based on the real-time operation data of each device received; if it is determined that there is any abnormality in each device of the thermal network, the centralized control center issues an early warning corresponding to each device;

[0016] The centralized control center also establishes a simulation model based on the historical operation data of each device monitored by the monitoring module. The simulation model calculates the performance index of each device based on the real-time operation data of each device received by the centralized control center, and issues an early warning for the operation status of each device based on the calculated performance index of each device.

[0017] In the embodiment of the present invention, the centralized control center is further used to classify the risk level according to the calculated performance index of each device, and to track, monitor and maintain each device according to the risk level of the performance index of each device.

[0018] A second aspect of the present invention provides a heat load allocation method for a heat pipe network, which is applied to the heat pipe network as described above, and the method comprises:

[0019] The heat load is allocated to the direct heat energy station, the combined heat and power energy station and the energy storage peak-shaving energy station according to the user's heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler, the fuel calorific value and thermal efficiency of the second pulverized coal boiler and the fuel calorific value and thermal efficiency of the third pulverized coal boiler.

[0020] In an embodiment of the present invention, the heat load is allocated to the direct heat energy station, the combined heat and power energy station, and the energy storage peak load regulation energy station according to the user heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler, the fuel calorific value and thermal efficiency of the second pulverized coal boiler, and the fuel calorific value and thermal efficiency of the third pulverized coal boiler, including:

[0021] A minimum cost objective function is established according to the user heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler, the fuel calorific value and thermal efficiency of the second pulverized coal boiler, and the fuel calorific value and thermal efficiency of the third pulverized coal boiler;

[0022] Determining the boundary conditions of the minimum cost objective function according to the heat load range value of the first pulverized coal boiler, the heat load range value of the second pulverized coal boiler, and the heat load range value of the third pulverized coal boiler;

[0023] The minimum cost objective function is solved according to the boundary conditions of the minimum cost objective function to obtain the heat load of the direct heat energy station, the heat load of the combined heat and power energy station and the heat load of the energy storage peak-shaving energy station.

[0024] In an embodiment of the present invention, the method further includes:

[0025] When the change rate of the user's heat load value exceeds the preset change rate, the energy storage peak-shaving energy station is dispatched to adjust the heat load;

[0026] When the regulating capacity of the energy storage peak-shaving energy station for regulating the heat load does not meet the regulation demand, the direct heat supply energy station is dispatched to continue regulating the heat load.

[0027] In an embodiment of the present invention, when the regulation capability of the energy storage peak load regulation station to regulate the heat load does not meet the regulation demand, the direct heat supply energy station is dispatched to continue regulating the heat load, including:

[0028] Obtain the maximum heat load change rate of the third pulverized coal boiler and the maximum heat load change rate of the heat storage device in the energy storage peak-shaving energy station;

[0029] When the rate of change of the user's heat load value is less than or equal to the maximum rate of change of the heat load of the third pulverized coal boiler in the energy storage peak-shaving energy station, the heat load of the third pulverized coal boiler in the energy storage peak-shaving energy station is adjusted to match the change of the user's heat load;

[0030] When the rate of change of the user's heat load value is greater than the maximum heat load change rate of the third pulverized coal boiler in the energy storage peak-shaving energy station, and the rate of change of the user's heat load is less than the sum of the maximum heat load change rate of the third pulverized coal boiler in the energy storage peak-shaving energy station and the maximum heat load change rate of the heat storage device, the heat loads of the third pulverized coal boiler and the heat storage device in the energy storage peak-shaving energy station are adjusted to match the change of the user's heat load;

[0031] When the rate of change of the user's thermal load value is greater than the sum of the maximum thermal load change rate of the third pulverized coal boiler in the energy storage peak-shaving energy station and the maximum thermal load change rate of the heat storage device, the thermal loads of the third pulverized coal boiler and the heat storage device in the energy storage peak-shaving energy station and the direct heating energy station are adjusted to match the changes in the user's thermal load.

[0032] The thermal network reduces the laying of long-distance thermal pipelines to reduce costs through the distributed arrangement of direct-supply heating energy stations, combined heat and power energy stations, and energy storage and peak-shaving energy stations. The direct-supply heating energy stations, combined heat and power energy stations, and energy storage and peak-shaving energy stations work together to ensure that the heating of the thermal network is not restricted by the thermal power load regulation characteristics of the thermal power units. The collaborative work of the multiple heating methods ensures the heating efficiency, and the variable load regulation capability of the thermal network is ensured through the energy storage and peak-shaving energy stations.

[0033] Other features and advantages of the technical solution of the present invention will be described in detail in the specific implementation section below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0035] Figure 1 is a structural schematic diagram of a thermal network provided by an embodiment of the present invention;

[0036] Figure 2 It is a structural block diagram of a thermal network provided by an embodiment of the present invention;

[0037] Figure 3 It is a flow chart of a heat load allocation method for a thermal network provided in an embodiment of the present invention.

[0038] Description of Reference Numerals

[0039] 1-the first pulverized coal boiler, 2-the second pulverized coal boiler, 3-the back pressure generator set, 4-the third pulverized coal boiler, 5-the heat storage device, 6-the hot water pipe. DETAILED DESCRIPTION

[0040] In order to make the technical solutions and advantages of the embodiments of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the process of realizing the present invention, the inventors found that there are two main types of commonly used urban heating and thermal power pipelines. One type uses a small boiler as a heat source to provide heating for the surrounding areas; the other type uses long-distance pipelines to connect large thermal power plants around towns and uses thermal power units to extract steam to provide heating for urban users. The main problems with the former include: old and small boilers are not given enough attention, have low technical levels, and poor maintenance; coal-fired boilers have low thermal efficiency and low environmental protection levels; and gas-fired boilers have high fuel costs. The main problems with the latter are: poor thermal power load regulation capabilities, which reduce the deep peak regulation and rapid load change capabilities of thermal power plant units, and indirectly affect the access of new energy power generation to the power grid. Based on this, the existing technology has the problems of low heating efficiency and poor load change regulation capabilities when supplying heat and thermal power pipelines.

[0045] In view of the above problems, a thermal network is provided in an embodiment of the present invention, comprising: a plurality of direct-supply thermal energy stations, combined heat and power energy stations and energy storage peak-shaving energy stations arranged in a distributed manner, wherein the direct-supply thermal energy stations, combined heat and power energy stations and energy storage peak-shaving energy stations are connected via a hot water pipe 6 to form a thermal network; the direct-supply thermal energy station comprises: a first pulverized coal boiler 1, for heating the thermal network water by using the steam generated by the first pulverized coal boiler 1; the combined heat and power energy station comprises: a second pulverized coal boiler 2 and a back-pressure generator set 3; a generator set 3 for using the second pulverized coal boiler 2 to generate steam The steam enters the back-pressure generator set 3 to perform work, and the exhaust steam generated by the back-pressure generator set is used to heat the hot network water; the energy storage peak-shaving energy station includes: a third pulverized coal boiler 4 and a heat storage device 5, which is used to use one path of steam generated by the third pulverized coal boiler 4 to heat the hot network water when operating under low load, and use another path of steam generated by the third pulverized coal boiler 4 to enter the heat storage device 5 to store steam heat; when operating under high load, all the steam generated by the third pulverized coal boiler 4 is used to heat the hot network water, and at the same time, the steam heat stored in the heat storage device 5 is used to heat the hot network water. The thermal network reduces the laying of long-distance thermal pipelines to reduce costs through the distributed arrangement of direct-supply heating energy stations, combined heat and power energy stations, and energy storage and peak-shaving energy stations. The direct-supply heating energy stations, combined heat and power energy stations, and energy storage and peak-shaving energy stations work together to ensure that the heating of the thermal network is not restricted by the thermal power load regulation characteristics of the thermal power units. The collaborative work of the multiple heating methods ensures the heating efficiency, and the variable load regulation capability of the thermal network is ensured through the energy storage and peak-shaving energy stations.

[0046] Figure 1 is a schematic diagram of the structure of a thermal network provided by an embodiment of the present invention. Figure 2 is a structural block diagram of a heat pipe network provided by an embodiment of the present invention. Figure 1-2As shown, this embodiment provides a thermal network, including: a plurality of distributed direct heat energy stations, combined heat and power energy stations, and energy storage peak-shaving energy stations, wherein the direct heat energy stations, combined heat and power energy stations, and energy storage peak-shaving energy stations are connected through hot water pipes 6 to form a thermal network;

[0047] The direct heat energy station comprises: a first pulverized coal boiler 1, which is used to heat the water in the heat network by using the steam generated by the first pulverized coal boiler 1;

[0048] The cogeneration energy station comprises: a second pulverized coal boiler 2 and a back-pressure generator set 3, which is used to utilize the steam generated by the second pulverized coal boiler 2 to enter the back-pressure generator set 3 to perform work, and heat the hot water network through the exhaust steam generated by the back-pressure generator set 3;

[0049] The energy storage and peak-shaving energy station includes: a third pulverized coal boiler 4 and a heat storage device 5, which is used to use one path of steam generated by the third pulverized coal boiler 4 to heat the hot network water when in a low-load operation state, and use another path of steam generated by the third pulverized coal boiler 4 to enter the heat storage device 5 to store steam heat; when in a high-load operation state, all the steam generated by the third pulverized coal boiler 4 is used to heat the hot network water, and at the same time, the steam heat stored in the heat storage device 5 is used to heat the hot network water.

[0050] Specifically, the direct heat supply energy station, the combined heat and power energy station and the energy storage peak load regulating energy station all supply heat to users through the hot water pipe 6 to form a heat pipe network;

[0051] In this embodiment, the first pulverized coal boiler 1, the second pulverized coal boiler 2 and the third pulverized coal boiler 4 all adopt an L-shaped furnace, the thermal efficiency of the first pulverized coal boiler 1, the second pulverized coal boiler 2 and the third pulverized coal boiler 4 is greater than a preset efficiency value, and the original NOx emission concentration of the first pulverized coal boiler 1, the second pulverized coal boiler 2 and the third pulverized coal boiler 4 is less than a preset emission concentration value.

[0052] Specifically, a plurality of energy stations arranged in a decentralized manner provide heat sources, which are connected through hot water pipes 6 to form a heat network to provide heat for urban users. The energy stations in the above-mentioned heat network are divided into three categories, including direct heat energy stations, combined heat and power energy stations, and energy storage peak-shaving energy stations. The efficient first pulverized coal boiler 1 in the direct heat energy station generates hot water and directly supplies the heat network; the efficient second pulverized coal boiler 2 in the combined heat and power energy station generates steam and enters the back pressure machine in the back pressure generator set 3 to work, and the exhaust steam of the back pressure machine heats the water to supply the heat network, and the back pressure machine drives the generator in the back pressure generator set 3 to generate electricity, realizing cogeneration of heat and power; the efficient third pulverized coal boiler 4 of the energy storage peak-shaving energy station is equipped with a heat storage device 5, and uses heat transfer oil as the heat storage medium. During low load periods, the third pulverized coal boiler 4 heats the heat network water while heating the heat storage medium with waste heat, and stores the heat storage medium in a heat storage tank. During high load periods, the heat storage medium is used to supplement and heat the heat network water, thereby improving the peak heating capacity of the heat network.

[0053] The first pulverized coal boiler 1, the second pulverized coal boiler 2 or the third pulverized coal boiler 4 equipped in each energy station all adopt an L-shaped furnace design. Each pulverized coal boiler uses a new high pulverized coal concentration pre-thermolysis double vortex control combustion technology, with a boiler thermal efficiency of ≥92% and NOx original emission <100mg / Nm3. The hot water generated by the above energy stations is sent to the hot water pipe network, and is transported to heat users through the connection and allocation of the hot water pipe network.

[0054] The heat source is provided by decentralized high-efficiency pulverized coal boilers, which are not restricted by the thermal power load regulation characteristics of thermal power units and do not affect the deep peak-shaving capacity of thermal power units. At the same time, the application of new high-efficiency pulverized coal boilers will solve the problems of low technical level, low thermal efficiency and low environmental protection level of old coal-fired boilers, significantly improve the thermal efficiency and environmental protection performance of boilers, and alleviate the pressure of gas costs.

[0055] In this embodiment, the thermal network further includes: a centralized control center;

[0056] The centralized control center allocates heat load to the direct heat energy station, combined heat and power energy station and energy storage peak-shaving energy station according to the user's heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler 1, the fuel calorific value and thermal efficiency of the second pulverized coal boiler 2 and the fuel calorific value and thermal efficiency of the third pulverized coal boiler 4.

[0057] Specifically, the centralized control center allocates heat load to the direct heat energy station, the combined heat and power energy station, and the energy storage peak load regulation energy station according to the user heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler 1, the fuel calorific value and thermal efficiency of the second pulverized coal boiler 2, and the fuel calorific value and thermal efficiency of the third pulverized coal boiler 4, specifically:

[0058] The centralized control center establishes a minimum cost objective function according to the user heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler 1, the fuel calorific value and thermal efficiency of the second pulverized coal boiler 2, and the fuel calorific value and thermal efficiency of the third pulverized coal boiler 4;

[0059] The centralized control center determines the boundary conditions of the minimum cost objective function according to the heat load range value of the first pulverized coal boiler 1, the heat load range value of the second pulverized coal boiler 2, and the heat load range value of the third pulverized coal boiler 4;

[0060] The centralized control center solves the minimum cost objective function according to the boundary conditions of the minimum cost objective function to obtain the heat load of the direct heat energy station, the heat load of the combined heat and power energy station, and the heat load of the energy storage peak-shaving energy station.

[0061] Specifically, the centralized control center uses the load distribution guidance module to optimize the calculation and uniformly allocate the loads of each energy station in the thermal network.

[0062] The centralized control center uses steady-state load distribution and variable load distribution to distribute heat load to each energy station.

[0063] The steady-state load distribution method is:

[0064] When the user's thermal load value is stable, the steady-state load distribution method is used. According to the user's thermal load value, boiler fuel calorific value, boiler thermal efficiency and other conditions, the load is distributed with the goal of matching the energy station's heating load with the user's thermal load and minimizing the sum of the fuel costs of each energy station.

[0065] Assume the user heat load is p D , the heat load of direct heating energy station i is p i 、The heat load of the combined heat and power energy station is p j 、The heat load of the energy storage peak load regulation station k is p k , then:

[0066]

[0067] Assume that the maximum heat load of the boiler in direct heating energy station i is p i,max , the minimum heat load is p i,min ;

[0068] The maximum heat load of the boiler in the combined heat and power energy station j is p j,max , the minimum heat load is p j,min ;

[0069] The maximum heat load of the peak-shaving energy storage station k boiler during operation is p k，max , the minimum heat load is p k,min ;

[0070] Then the boundary condition of load distribution (that is, the boundary condition of the minimum cost objective function) is:

[0071]

[0072] Assume that the thermal efficiency of direct heating energy station i is η i The calorific value of the fuel used is B i 、The amount of fuel consumed m i 、The unit price of fuel is Q i , the total fuel cost is C i ;

[0073] The thermal efficiency of the combined heat and power energy station j is η j The calorific value of the fuel used is B j 、The amount of fuel consumed m j 、The unit price of fuel is Q j , the total fuel cost is C j ;

[0074] The thermal efficiency of the energy storage peak load regulation station k is η k The calorific value of the fuel used is B k 、The amount of fuel consumed m k 、The unit price of fuel is Q k , the total fuel cost is C k ;

[0075]

[0076]

[0077]

[0078]

[0079]

[0080]

[0081] Therefore, the total fuel cost of the thermal network management is:

[0082]

[0083] The steady-state load distribution aims to minimize the total fuel cost C, in order to give priority to allocating high loads to energy stations with high thermal efficiency and low fuel cost.

[0084] Then the minimum cost objective function can be obtained as follows:

[0085]

[0086]

[0087] The load distribution guidance system provides a variety of optimization methods such as genetic algorithm and particle swarm algorithm for users to choose. Under the above conditions, the optimal heat load of direct heating energy station i is calculated as p i 、The heat load of the combined heat and power energy station is p j 、The heat load of the energy storage peak load regulation station k is p k .

[0088] The variable load distribution method is;

[0089] In this embodiment, the centralized control center is also used to dispatch the energy storage peak-shaving energy station to adjust the heat load when the change rate of the user's heat load value exceeds a preset change rate; when the adjustment capacity of the energy storage peak-shaving energy station to adjust the heat load does not meet the adjustment demand, the direct heat supply energy station is dispatched to adjust the heat load.

[0090] Specifically, when the regulating capacity of the energy storage peak-shaving energy station to regulate the heat load does not meet the regulation demand, the centralized control center dispatches the direct heat supply energy station to continue regulating the heat load, including:

[0091] Obtain the maximum heat load change rate of the third pulverized coal boiler 4 and the maximum heat load change rate of the heat storage device 5 in the energy storage peak-shaving energy station;

[0092] When the rate of change of the user's heat load value is less than or equal to the maximum rate of change of the heat load of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station, the heat load of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station is adjusted to cope with the change of the user's heat load;

[0093] When the rate of change of the user's heat load value is greater than the maximum heat load change rate of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station, and the rate of change of the user's heat load is less than the sum of the maximum heat load change rate of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station and the maximum heat load change rate of the heat storage device 5, the heat loads of the third pulverized coal boiler 4 and the heat storage device 5 in the energy storage peak-shaving energy station are adjusted to cope with changes in the user's heat load;

[0094] When the rate of change of the user's thermal load value is greater than the sum of the maximum thermal load change rate of the third pulverized coal boiler 4 and the maximum thermal load change rate of the heat storage device 5 in the energy storage peak-shaving energy station, the thermal loads of the third pulverized coal boiler 4 and the heat storage device 5 in the energy storage peak-shaving energy station and the direct heating energy station are adjusted to cope with changes in the user's thermal load.

[0095] Specifically, the dispatching principles of each energy station during the variable load process of the user's heat load are as follows:

[0096] Direct heat energy station: By adjusting the fuel and water supply of the efficient first pulverized coal boiler 1, the load adjustment of the energy station is achieved. The load change rate is mainly restricted by the performance and thermal inertia of the boiler equipment.

[0097] Combined heat and power energy station: It adopts a high-efficiency second pulverized coal boiler 2 + back-pressure steam turbine configuration, thermal and electrical coupling. If the heating load is adjusted, it will affect the power generation capacity of the combined heat and power energy station and is not conducive to the efficiency of the back-pressure steam turbine. Therefore, try not to use the combined heat and power energy station to adjust the load.

[0098] Energy storage peak-shaving energy station: Energy storage peak-shaving energy station has two load regulation methods. One is the same as the direct heat supply energy station, which adjusts the heat load supplied by the energy station by adjusting the fuel amount and water supply of the efficient third pulverized coal boiler 4. Because the pulverized coal boiler has a large thermal inertia and the load regulation is slow, when the load regulation rate is required to be high, the energy storage peak-shaving energy station can use the heat storage capacity to quickly adjust the heat load. When the load is reduced, the waste heat of the boiler is used to heat the thermal oil and store this part of the heat, while reducing the boiler feed water to reduce the heat load supplied by the energy station. When the heat load increases, the water supply is increased and the heat stored in the thermal oil is used for heating, which increases the heat load output by the energy station in a short time. The energy storage peak-shaving energy station adjusts the load faster than the direct heat supply energy station.

[0099] In summary, the dispatching principles of energy stations during variable load processes are as follows:

[0100] The heating network is divided into several areas. The heat load supply capacity of each energy station in each area is equivalent to the user's heat load, and it includes at least one direct heating energy station and one energy storage peak-shaving energy station.

[0101] When the heat load of users in a certain area changes, the energy storage peak-shaving energy stations in the area are preferentially dispatched to adjust the load. When the energy storage peak-shaving energy stations cannot meet the peak-shaving needs, the direct heat supply energy stations are dispatched to adjust the load to supplement them. The load of the cogeneration energy station remains stable.

[0102] Assume that the rate of change of user heat load in this area is The maximum heat load change rate of the third pulverized coal boiler 4 of the energy storage peak-shaving energy station k is The maximum heat load change rate of the heat storage device 5 of the energy storage peak load regulation station k is Then we have:

[0103] when When the energy storage peak-shaving energy station is dispatched, the fuel quantity and water supply of the third pulverized coal boiler 4 are adjusted to adjust the heat load;

[0104] when When the energy storage peak-shaving energy station is dispatched, the fuel amount and water supply amount of the third pulverized coal boiler 4 are adjusted, and the heat storage device 5 is used to store and release heat to adjust the heat load;

[0105] when When the energy storage peak-shaving energy station and the direct heating energy station are dispatched, the heat load is jointly adjusted.

[0106] When the load variation process ends, that is, when the rate of change of the user's thermal load is less than the preset rate of change, the steady-state load distribution method is restored to improve the economy of the thermal network.

[0107] In this embodiment, the preset change rate is 0.1, that is:

[0108] At 0.9p D <∑ i p i +∑ j p j +∑ k p k <1.1p D When the centralized control center adopts the steady-state load distribution method;

[0109] In ∑ i p i +∑ j p j +∑ k p k <0.9p D or i p i +∑ j p j +∑ k p k >1.1p D When the load is variable, the centralized control center adopts variable load distribution method.

[0110] The centralized control center uniformly allocates the heat load of each energy station to ensure the stability of the back pressure unit load of the combined heat and power energy station and improve the operation stability of the unit. The heat storage device 5 is used to increase the load change rate of the energy storage peak-shaving energy station, thereby effectively improving the system load response capability.

[0111] The centralized control center optimizes the calculation and uniformly allocates the loads of each energy station in the thermal network based on the user's thermal load value, the user's thermal load change rate, the boiler fuel calorific value, the boiler thermal efficiency and other conditions, and on the basis of meeting (but not limited to) the following principles:

[0112] (1) The sum of the heat loads supplied by each energy station is equal to the user's heat load;

[0113] (2) The load change rate of the thermal network is optimal;

[0114] (3) The sum of fuel costs of all energy stations is the lowest.

[0115] In this embodiment, the thermal network further includes: a monitoring module;

[0116] The monitoring module is used to monitor the real-time operation data of each device in the thermal network, and send the monitored real-time operation data of each device to the centralized control center;

[0117] The centralized control center determines whether there is any abnormality in each device of the thermal network based on the real-time operation data of each device received; if it is determined that there is any abnormality in each device of the thermal network, the centralized control center issues an early warning corresponding to each device;

[0118] The centralized control center also establishes a simulation model based on the historical operation data of each device monitored by the monitoring module. The simulation model calculates the performance index of each device based on the real-time operation data of each device received by the centralized control center, and issues an early warning for the operation status of each device based on the calculated performance index of each device.

[0119] In this embodiment, the centralized control center is further used to classify risk levels according to the calculated performance indicators of each device, and to track, monitor and maintain each device according to the risk level of the performance indicator of each device.

[0120] In this embodiment, the equipment in the thermal network includes: a water supply pump, an induced draft fan, a supply fan, a primary fan, and a thermal network water pump.

[0121] Specifically, a remote monitoring module is used to monitor the operating status of each device in the thermal network at the centralized control center, identify abnormal equipment status, and arrange maintenance reasonably according to its impact on equipment operation. The remote monitoring module collects the actual operating data of the equipment and transmits it to the data center for storage and calculation. A modular adjoint simulation method is used, with the thermal model of the equipment as the initial framework, and the machine learning of real-time and historical operating data is continuously iterated and updated to form an adjoint simulation model that gradually approaches the actual operating equipment performance. Through this model, the operating parameters of the thermal network equipment are analyzed in real time, and the equipment performance indicators and their changing trends over time are calculated, so as to identify and warn of abnormal equipment status.

[0122] According to the abnormal identification and early warning information of the remotely set monitoring module, technical experts make maintenance decisions based on the condition maintenance and graded maintenance methods. For abnormalities that may cause equipment failure and shutdown, personnel are arranged to handle them in a timely manner; for abnormalities that affect equipment performance indicators but will not cause equipment failure and shutdown, they are arranged to be handled in subsequent planned maintenance; for abnormalities that do not obviously affect equipment performance in the short term but will cause equipment performance degradation in the long run, long-term tracking analysis is carried out, and equipment maintenance is arranged in a timely manner according to the equipment performance degradation trend.

[0123] Figure 3 FIG. 1 is a flow chart of a method for adjusting the heat load of a heat pipe network provided by an embodiment of the present invention. Figure 3 As shown, the heat load allocation method of the thermal network provided in this embodiment includes:

[0124] S1. Obtain the user's heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler 1, the fuel calorific value and thermal efficiency of the second pulverized coal boiler 2, and the fuel calorific value and thermal efficiency of the third pulverized coal boiler 4;

[0125] S2. Allocate heat load to the direct heat energy station, combined heat and power energy station and energy storage peak-shaving energy station according to the user's heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler 1, the fuel calorific value and thermal efficiency of the second pulverized coal boiler 2 and the fuel calorific value and thermal efficiency of the third pulverized coal boiler 4.

[0126] In step S2, the heat load is allocated to the direct heat energy station, the combined heat and power energy station and the energy storage peak load regulating energy station according to the user heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler 1, the fuel calorific value and thermal efficiency of the second pulverized coal boiler 2 and the fuel calorific value and thermal efficiency of the third pulverized coal boiler 4, including:

[0127] A minimum cost objective function is established according to the user heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler 1, the fuel calorific value and thermal efficiency of the second pulverized coal boiler 2, and the fuel calorific value and thermal efficiency of the third pulverized coal boiler 4;

[0128] Determining the boundary conditions of the minimum cost objective function according to the heat load range value of the first pulverized coal boiler 1, the heat load range value of the second pulverized coal boiler 2, and the heat load range value of the third pulverized coal boiler 4;

[0129] The minimum cost objective function is solved according to the boundary conditions of the minimum cost objective function to obtain the heat load of the direct heat energy station, the heat load of the combined heat and power energy station and the heat load of the energy storage peak-shaving energy station.

[0130] In this embodiment, the method further includes:

[0131] S3. When the rate of change of the user's heat load value exceeds the preset rate of change, the energy storage peak-shaving energy station is dispatched to adjust the heat load; when the adjustment capacity of the energy storage peak-shaving energy station to adjust the heat load does not meet the adjustment demand, the direct heat supply energy station is dispatched to continue to adjust the heat load.

[0132] In step S3, when the regulating capacity of the energy storage peak-shaving energy station for regulating the heat load does not meet the regulation demand, the direct heat supply energy station is dispatched to continue regulating the heat load, including:

[0133] Obtain the maximum heat load change rate of the third pulverized coal boiler 4 and the maximum heat load change rate of the heat storage device 5 in the energy storage peak-shaving energy station;

[0134] When the rate of change of the user's heat load value is less than or equal to the maximum rate of change of the heat load of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station, the heat load of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station is adjusted to match the change of the user's heat load;

[0135] When the rate of change of the user's heat load value is greater than the maximum heat load change rate of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station, and the rate of change of the user's heat load is less than the sum of the maximum heat load change rate of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station and the maximum heat load change rate of the heat storage device 5, the heat loads of the third pulverized coal boiler 4 and the heat storage device 5 in the energy storage peak-shaving energy station are adjusted to match the change of the user's heat load;

[0136] When the rate of change of the user's thermal load value is greater than the sum of the maximum thermal load change rate of the third pulverized coal boiler 4 and the maximum thermal load change rate of the heat storage device 5 in the energy storage peak-shaving energy station, the thermal loads of the third pulverized coal boiler 4 and the heat storage device 5 in the energy storage peak-shaving energy station and the direct heating energy station are adjusted to match the changes in the user's thermal load.

[0137] Steady-state load distribution method and variable load distribution method are used to distribute heat load to each energy station.

[0138] The steady-state load distribution method is:

[0139] When the user's thermal load value is stable, the steady-state load distribution method is used. According to the user's thermal load value, boiler fuel calorific value, boiler thermal efficiency and other conditions, the load is distributed with the goal of matching the energy station's heating load with the user's thermal load and minimizing the sum of the fuel costs of each energy station.

[0140] Assume the user heat load is p D , the heat load of direct heating energy station i is p i 、The heat load of the combined heat and power energy station is p j 、The heat load of the energy storage peak load regulation station k is p k , then:

[0141]

[0142] Assume that the maximum heat load of the boiler in direct heating energy station i is p i,max , the minimum heat load is p i,min ;

[0143] The maximum heat load of the boiler in the combined heat and power energy station j is p j,max , the minimum heat load is p j,min ;

[0144] The maximum heat load of the peak-shaving energy storage station k boiler during operation is p k，max , the minimum heat load is p k,min ;

[0145] Then the boundary condition of load distribution (that is, the boundary condition of the minimum cost objective function) is:

[0146]

[0147] Assume that the thermal efficiency of direct heating energy station i is η i The calorific value of the fuel used is B i 、The amount of fuel consumed m i 、The unit price of fuel is Q i , the total fuel cost is C i ;

[0148] The thermal efficiency of the combined heat and power energy station j is η j The calorific value of the fuel used is B j 、The amount of fuel consumed m j 、The unit price of fuel is Q j , the total fuel cost is C j ;

[0149] The thermal efficiency of the energy storage peak load regulation station k is η k The calorific value of the fuel used is B k 、The amount of fuel consumed m k 、The unit price of fuel is Q k , the total fuel cost is C k ;

[0150]

[0151]

[0152]

[0153]

[0154]

[0155]

[0156] Therefore, the total fuel cost of the thermal network management is:

[0157]

[0158] The steady-state load distribution aims to minimize the total fuel cost C, in order to give priority to allocating high loads to energy stations with high thermal efficiency and low fuel cost.

[0159] Then the minimum cost objective function can be obtained as follows:

[0160]

[0161]

[0162] The load distribution guidance system provides a variety of optimization methods such as genetic algorithm and particle swarm algorithm for users to choose. Under the above conditions, the optimal heat load of direct heating energy station i is calculated as p i 、The heat load of the combined heat and power energy station is p j 、The heat load of the energy storage peak load regulation station k is p k .

[0163] The variable load distribution method is;

[0164] When the rate of change of the user's thermal load value exceeds the preset rate of change, the energy storage peak-shaving energy station is dispatched to adjust the thermal load; when the adjustment capacity of the energy storage peak-shaving energy station to adjust the thermal load does not meet the adjustment demand, the direct heat supply energy station is dispatched to adjust the thermal load.

[0165] Specifically, when the regulation capacity of the energy storage peak load regulation station does not meet the regulation demand, the direct heat supply energy station is dispatched to continue regulating the heat load, including:

[0166] Obtain the maximum heat load change rate of the third pulverized coal boiler 4 and the maximum heat load change rate of the heat storage device 5 in the energy storage peak-shaving energy station;

[0167] When the rate of change of the user's heat load value is less than or equal to the maximum rate of change of the heat load of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station, the heat load of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station is adjusted to match the change of the user's heat load;

[0168] When the rate of change of the user's heat load value is greater than the maximum heat load change rate of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station, and the rate of change of the user's heat load is less than the sum of the maximum heat load change rate of the third pulverized coal boiler 4 in the energy storage peak-shaving energy station and the maximum heat load change rate of the heat storage device 5, the heat loads of the third pulverized coal boiler 4 and the heat storage device 5 in the energy storage peak-shaving energy station are adjusted to match the change of the user's heat load;

[0169] When the rate of change of the user's thermal load value is greater than the sum of the maximum thermal load change rate of the third pulverized coal boiler 4 and the maximum thermal load change rate of the heat storage device 5 in the energy storage peak-shaving energy station, the thermal loads of the third pulverized coal boiler 4 and the heat storage device 5 in the energy storage peak-shaving energy station and the direct heating energy station are adjusted to match the changes in the user's thermal load.

[0170] Specifically, the dispatching principles of each energy station during the variable load process of the user's heat load are as follows:

[0171] Direct heat energy station: By adjusting the fuel and water supply of the efficient first pulverized coal boiler 1, the load adjustment of the energy station is achieved. The load change rate is mainly restricted by the performance and thermal inertia of the boiler equipment.

[0172] Combined heat and power energy station: It adopts a high-efficiency second pulverized coal boiler 2 + back-pressure steam turbine configuration, thermal and electrical coupling. If the heating load is adjusted, it will affect the power generation capacity of the combined heat and power energy station and is not conducive to the efficiency of the back-pressure steam turbine. Therefore, try not to use the combined heat and power energy station to adjust the load.

[0173] Energy storage peak-shaving energy station: Energy storage peak-shaving energy station has two load regulation methods. One is the same as the direct heat supply energy station, which adjusts the heat load supplied by the energy station by adjusting the fuel amount and water supply of the efficient third pulverized coal boiler 4. Because the pulverized coal boiler has a large thermal inertia and the load regulation is slow, when the load regulation rate is required to be high, the energy storage peak-shaving energy station can use the heat storage capacity to quickly adjust the heat load. When the load is reduced, the waste heat of the boiler is used to heat the thermal oil and store this part of the heat, while reducing the boiler feed water to reduce the heat load supplied by the energy station. When the heat load increases, the water supply is increased and the heat stored in the thermal oil is used for heating, which increases the heat load output by the energy station in a short time. The energy storage peak-shaving energy station adjusts the load faster than the direct heat supply energy station.

[0174] In summary, the dispatching principles of energy stations during variable load processes are as follows:

[0175] The heating network is divided into several areas. The heat load supply capacity of each energy station in each area is equivalent to the user's heat load, and it includes at least one direct heating energy station and one energy storage peak-shaving energy station.

[0176] When the heat load of users in a certain area changes, the energy storage peak-shaving energy stations in the area are preferentially dispatched to adjust the load. When the energy storage peak-shaving energy stations cannot meet the peak-shaving needs, the direct heat supply energy stations are dispatched to adjust the load to supplement them. The load of the cogeneration energy station remains stable.

[0177] Assume that the rate of change of user heat load in this area is The maximum heat load change rate of the third pulverized coal boiler 4 of the energy storage peak-shaving energy station k is The maximum heat load change rate of the heat storage device 5 of the energy storage peak load regulation station k is Then we have:

[0178] when When the energy storage peak-shaving energy station is dispatched, the fuel quantity and water supply of the third pulverized coal boiler 4 are adjusted to adjust the heat load;

[0179] when When the energy storage peak-shaving energy station is dispatched, the fuel amount and water supply amount of the third pulverized coal boiler 4 are adjusted, and the heat storage device 5 is used to store and release heat to adjust the heat load;

[0180] when When the energy storage peak-shaving energy station and the direct heating energy station are dispatched, the heat load is jointly adjusted.

[0181] When the load variation process ends, that is, when the rate of change of the user's thermal load is less than the preset rate of change, the steady-state load distribution method is restored to improve the economy of the thermal network.

[0182] In this embodiment, the preset change rate is 0.1, that is:

[0183] At 0.9p D <∑ i p i +∑ j p j +∑ k p k <1.1p D When the centralized control center adopts the steady-state load distribution method;

[0184] In ∑ i p i +∑ j p j +∑ k p k <0.9p D or i p i +∑ j p j +Σ k p k >1.1p D When the load is variable, the centralized control center adopts variable load distribution method.

[0185] The embodiment of the present invention further provides a computer device, including: a memory, a processor and a computer program, wherein the computer program is stored in the memory and is configured to be executed by the processor to implement the above-mentioned heat load allocation method of the thermal network.

[0186] The embodiment of the present invention further provides a machine-readable storage medium on which computer program instructions are stored. When the computer program instructions are executed by a processor, the heat load allocation method of the thermal network is implemented.

[0187] The first pulverized coal boiler 1, the second pulverized coal boiler 2 and the third pulverized coal boiler 4 used in the thermal network proposed in this embodiment are high-efficiency boilers, which can improve the heating efficiency and solve the problems of low technical level, low thermal efficiency and low environmental protection level of old coal-fired boilers, significantly improve the thermal efficiency and environmental protection performance of boilers, and also alleviate the pressure of gas cost. In addition, the thermal network provided in this embodiment utilizes a heat storage device 5, a back-pressure generator set 3, a monitoring module and a centralized control center, so that the system has multiple functions such as heat supply, power supply, heat storage peak regulation, and centralized intelligent operation and maintenance capabilities.

[0188] The thermal network provided in this embodiment includes distributed direct heating energy stations, combined heat and power energy stations and energy storage peak-shaving energy stations; the corresponding first pulverized coal boiler 1, second pulverized coal boiler 2 and third pulverized coal boiler 4 are also distributed, so that the thermal network is not restricted by the thermal power load regulation characteristics of the power unit and does not affect the deep peak-shaving capability of the thermal power unit.

[0189] The thermal network proposed in this embodiment also includes a monitoring module, which is used to monitor various operating equipment in the thermal network, thereby improving the intelligent level of thermal network equipment operation and maintenance, improving equipment performance and life, and reducing labor costs.

[0190] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The schemes in the embodiments of the present invention may be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0191] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0192] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0193] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0194] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0195] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A thermal network, characterized in that: include: Multiple direct heat supply energy stations, combined heat and power energy stations and energy storage peak-shaving energy stations are arranged in a distributed manner, wherein the direct heat supply energy stations, combined heat and power energy stations and energy storage peak-shaving energy stations are connected through hot water pipes to form a heat pipe network; The direct heat energy station comprises: a first pulverized coal boiler, which is used to heat the water in the heat network by using the steam generated by the first pulverized coal boiler; The cogeneration energy station comprises: a second pulverized coal boiler and a back-pressure generator set, which is used to utilize the steam generated by the second pulverized coal boiler to enter the back-pressure generator set to perform work, and heat the hot network water through the exhaust steam generated by the back-pressure generator set; The energy storage and peak-shaving energy station includes: a third pulverized coal boiler and a heat storage device, which is used to use one path of steam generated by the third pulverized coal boiler to heat the hot network water when in a low-load operating state, and use another path of steam generated by the third pulverized coal boiler to enter the heat storage device to store steam heat; when in a high-load operating state, all the steam generated by the third pulverized coal boiler is used to heat the hot network water, and at the same time, the steam heat stored in the heat storage device is used to heat the hot network water.

2. The thermal network according to claim 1, characterized in that: The first pulverized coal boiler, the second pulverized coal boiler and the third pulverized coal boiler all adopt L-shaped furnaces, the thermal efficiency of the first pulverized coal boiler, the second pulverized coal boiler and the third pulverized coal boiler is greater than the preset efficiency value, and the original NOx emission concentration of the first pulverized coal boiler, the second pulverized coal boiler and the third pulverized coal boiler is less than the preset emission concentration value.

3. The thermal network according to claim 1, characterized in that: Also includes: Centralized control center; The centralized control center allocates heat load to the direct heat energy station, the combined heat and power energy station, and the energy storage peak-shaving energy station according to the user's heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler, the fuel calorific value and thermal efficiency of the second pulverized coal boiler, and the fuel calorific value and thermal efficiency of the third pulverized coal boiler.

4. The thermal network according to claim 3, characterized in that: The centralized control center is also used to dispatch the energy storage peak-shaving energy station to adjust the heat load when the change rate of the user's heat load value exceeds a preset change rate; and to dispatch the direct heat supply energy station to adjust the heat load when the adjustment capacity of the energy storage peak-shaving energy station does not meet the adjustment demand.

5. The thermal network according to claim 3, characterized in that: Also includes: Monitoring module; The monitoring module is used to monitor the real-time operation data of each device in the thermal network, and send the monitored real-time operation data of each device to the centralized control center; The centralized control center determines whether there is an abnormality in each device of the thermal network based on the real-time operation data of each device received; If it is determined that there is an abnormality in the equipment of the thermal network, the centralized control center will issue an early warning corresponding to each device; The centralized control center also establishes a simulation model based on the historical operation data of each device monitored by the monitoring module. The simulation model calculates the performance index of each device based on the real-time operation data of each device received by the centralized control center, and issues an early warning for the operation status of each device based on the calculated performance index of each device.

6. The thermal network according to claim 3, characterized in that: The centralized control center is also used to divide the risk level according to the calculated performance indicators of each device, and track, monitor and maintain each device according to the risk level of the performance indicator of each device.

7. A method for adjusting heat load in a heat pipe network, applied to the heat pipe network as claimed in any one of claims 1 to 6, characterized in that: The method comprises: The heat load is allocated to the direct heat energy station, the combined heat and power energy station and the energy storage peak-shaving energy station according to the user's heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler, the fuel calorific value and thermal efficiency of the second pulverized coal boiler and the fuel calorific value and thermal efficiency of the third pulverized coal boiler.

8. The heat load allocation method of the thermal network according to claim 7, characterized in that: The method of allocating heat load to the direct heat energy station, the combined heat and power energy station and the energy storage peak load regulation energy station according to the user heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler, the fuel calorific value and thermal efficiency of the second pulverized coal boiler and the fuel calorific value and thermal efficiency of the third pulverized coal boiler includes: A minimum cost objective function is established according to the user heat load value, the fuel calorific value and thermal efficiency of the first pulverized coal boiler, the fuel calorific value and thermal efficiency of the second pulverized coal boiler, and the fuel calorific value and thermal efficiency of the third pulverized coal boiler; Determining the boundary conditions of the minimum cost objective function according to the heat load range value of the first pulverized coal boiler, the heat load range value of the second pulverized coal boiler, and the heat load range value of the third pulverized coal boiler; The minimum cost objective function is solved according to the boundary conditions of the minimum cost objective function to obtain the heat load of the direct heat energy station, the heat load of the combined heat and power energy station and the heat load of the energy storage peak-shaving energy station.

9. The heat load allocation method of the thermal network according to claim 7, characterized in that: The method further comprises: When the change rate of the user's heat load value exceeds the preset change rate, the energy storage peak-shaving energy station is dispatched to adjust the heat load; When the regulating capacity of the energy storage peak-shaving energy station for regulating the heat load does not meet the regulation demand, the direct heat supply energy station is dispatched to continue regulating the heat load.

10. The heat load allocation method of the thermal network according to claim 9, characterized in that: When the regulating capacity of the energy storage peak-shaving energy station for regulating the heat load does not meet the regulation demand, the direct heat supply energy station is dispatched to continue regulating the heat load, including: Obtain the maximum heat load change rate of the third pulverized coal boiler and the maximum heat load change rate of the heat storage device in the energy storage peak-shaving energy station; When the rate of change of the user's heat load value is less than or equal to the maximum rate of change of the heat load of the third pulverized coal boiler in the energy storage peak-shaving energy station, the heat load of the third pulverized coal boiler in the energy storage peak-shaving energy station is adjusted to match the change of the user's heat load; When the rate of change of the user's heat load value is greater than the maximum heat load change rate of the third pulverized coal boiler in the energy storage peak-shaving energy station, and the rate of change of the user's heat load is less than the sum of the maximum heat load change rate of the third pulverized coal boiler in the energy storage peak-shaving energy station and the maximum heat load change rate of the heat storage device, the heat loads of the third pulverized coal boiler and the heat storage device in the energy storage peak-shaving energy station are adjusted to match the change of the user's heat load; When the rate of change of the user's thermal load value is greater than the sum of the maximum thermal load change rate of the third pulverized coal boiler in the energy storage peak-shaving energy station and the maximum thermal load change rate of the heat storage device, the thermal loads of the third pulverized coal boiler and the heat storage device in the energy storage peak-shaving energy station and the direct heating energy station are adjusted to match the changes in the user's thermal load.

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