Heat supply network source side renewable energy source regulation and control method and system, medium and product

Abstract

The invention discloses a heat supply network source side renewable energy source regulation and control method and system, a medium and a product, and relates to the technical field of renewable energy source integration and heat supply. According to the method, the regulation and control system collects the real-time water return temperature of the primary side main water return pipe, the target water supply temperature of the primary side main water supply pipe and the outlet water temperature of the renewable energy source branch to determine the physical topological structure of the renewable energy source branch connected to the source side of the urban heat supply network, and correspondingly adjusts the valve opening degree of the multi-way valve set to be connected with the flow path. According to the self-adaptive heat supply network source side renewable energy source regulation and control method, the access mode of the renewable energy source on the urban heat supply network source side can be flexibly adjusted according to the output change of the renewable energy source, invalid circulation is avoided while the heat exchange effect is guaranteed, and therefore the utilization efficiency of the renewable energy source is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of renewable energy integration and heating, and particularly relates to a heat network source side renewable energy regulation method and system, a medium and a product. BACKGROUND

[0002] With the acceleration of urbanization and the transformation and upgrading of energy structure, the urban heating system not only meets the heating demand of residents, but also faces the challenges of energy saving and emission reduction and improvement of energy utilization efficiency. The source side of the urban heat network, as the core link of the urban heating system, needs to make full use of clean energy such as renewable energy to realize the green and low-carbon development of the urban heating system.

[0003] At present, the source side of the urban heat network usually adopts a fixed access mode to integrate renewable energy, that is, the renewable energy device is fixedly accessed to a certain position of the primary side main return water pipe or the primary side main water supply pipe. This access mode controls the heat supply of renewable energy by setting a regulating valve at the fixed access point to meet the heating demand of the source side of the urban heat network.

[0004] In actual operation, due to the fluctuation and instability of the heat quality and supply of renewable energy, the fixed access mode is difficult to adapt to the changes of the quality of renewable energy in time and difficult to fully exert the heating potential of renewable energy, thereby causing low energy utilization efficiency. SUMMARY

[0005] The present application provides a heat network source side renewable energy regulation method and system, a medium and a product for improving the utilization efficiency of renewable energy.

[0006] In a first aspect, the present application provides a heat network source side renewable energy regulation method applied to a regulation system of a city heat network source side. The city heat network source side further includes a primary side main return water pipe, a primary side main water supply pipe, a main heat source, and a renewable energy branch. The primary side main return water pipe is used to collect return water of each heat exchange device of the city heat network and return to the city heat network source side for reheating. The primary side main water supply pipe is used to deliver heated water from the city heat network source side to each heat exchange device of the city heat network for heating. The main heat source represents a basic heat load supply source of the city heat network source side. The renewable energy branch is used to recover or supplement heat through a renewable energy device. The method includes: collecting real-time return water temperature of the primary side main return water pipe, target water supply temperature of the primary side main water supply pipe, and outlet water temperature of the renewable energy branch at the current time; comparing the outlet water temperature with the real-time return water temperature and the target water supply temperature respectively to determine an energy level matching mode of the renewable energy branch at the current time. The energy level matching mode includes one of a low energy level bypass mode, a medium energy level series preheating mode, and a high energy level parallel heating mode. According to the energy level matching mode, a corresponding valve switching instruction is generated. The valve switching instruction is used to control a multi-way valve group arranged between the renewable energy branch and the primary side main return water pipe and the primary side main water supply pipe to switch the flow path to change the physical topology structure of the renewable energy branch connected to the city heat network source side.

[0007] By adopting the above technical solution, the regulation system collects the real-time return water temperature of the primary side main return water pipe, the target water supply temperature of the primary side main water supply pipe, and the outlet water temperature of the renewable energy branch to determine the physical topology structure of the renewable energy branch connected to the city heat network source side, and accordingly adjusts the valve opening degree and the flow path connection of the multi-way valve group. This self-adaptive heat network source side renewable energy regulation method can flexibly adjust the connection mode of the renewable energy branch to the city heat network source side according to the output change of the renewable energy, ensures the heat exchange effect, avoids invalid circulation, and thus improves the utilization efficiency of the renewable energy.

[0008] In combination with some embodiments of the first aspect, in some embodiments, the outlet water temperature is compared with the real-time return water temperature and the target water supply temperature respectively to determine the energy level matching mode of the renewable energy branch at the current time. The energy level matching mode includes one of a low energy level bypass mode, a medium energy level series preheating mode, and a high energy level parallel heating mode. Specifically, the temperature difference between the outlet water temperature and the real-time return water temperature is calculated. When the temperature difference is less than a preset effective heat exchange threshold, the energy level matching mode is determined as the low energy level bypass mode. When the temperature difference is greater than or equal to the effective heat exchange threshold and the outlet water temperature is less than the target water supply temperature, the energy level matching mode is determined as the medium energy level series preheating mode. When the outlet water temperature is greater than or equal to the target water supply temperature, the energy level matching mode is determined as the high energy level parallel heating mode.

[0009] By adopting the technical scheme, the energy level matching mode is divided into three levels by the regulation system: when the temperature difference between the outlet water temperature and the real-time return water temperature is less than the effective heat exchange threshold, the low-energy-level bypass mode is adopted to avoid invalid heat exchange; when the temperature difference between the outlet water temperature and the real-time return water temperature is greater than or equal to the effective heat exchange threshold and the outlet water temperature is less than the target water supply temperature, the medium-energy-level series preheating mode is adopted to make full use of waste heat; and when the outlet water temperature is greater than or equal to the target water supply temperature, the high-energy-level parallel heating mode is adopted to directly participate in heating. The hierarchical control strategy not only ensures the heat exchange efficiency, but also realizes hierarchical utilization, so that the renewable energy branch always works in the best access mode.

[0010] In combination with some embodiments of the first aspect, in some embodiments, in a case where it is determined that the energy level matching mode is the low-energy-level bypass mode, the corresponding valve switching instruction is generated according to the energy level matching mode, specifically including: generating a first valve group instruction based on the low-energy-level bypass mode, the first valve group instruction being used to control the multi-way valve group to cut off the fluid communication between the renewable energy branch and the primary side main return water pipe, and simultaneously open the internal circulation bypass valve of the renewable energy branch itself.

[0011] By adopting the technical scheme, when the low-energy-level bypass mode is adopted, the regulation system cuts off the fluid communication between the renewable energy branch and the primary side main return water pipe through the first valve group instruction, and simultaneously opens the internal circulation bypass valve of the renewable energy branch itself. On the one hand, when the temperature difference is insufficient and the heat exchange value is low, the renewable energy branch is isolated from the main loop, thereby effectively avoiding unnecessary pipe resistance and pump power loss, and saving energy; on the other hand, by opening the internal circulation bypass valve, the minimum flow requirement of the renewable energy device itself can be maintained, which can not only avoid frequent start-stop or equipment damage of the renewable energy device due to sudden flow interruption, but also ensure the stable standby state of the renewable energy device, thereby laying a foundation for rapid response in subsequent working condition switching.

[0012] In combination with some embodiments of the first aspect, in some embodiments, in a case where it is determined that the energy level matching mode is the medium-energy-level series preheating mode, the corresponding valve switching instruction is generated according to the energy level matching mode, specifically including: generating a second valve group instruction based on the medium-energy-level series preheating mode, the second valve group instruction being used to control the multi-way valve group to connect the primary side main return water pipe and the inlet of the renewable energy branch, and connect the outlet of the renewable energy branch to the main heat source, so that the fluid in the primary side main return water pipe first flows through the renewable energy branch for preheating, and then enters the main heat source.

[0013] By adopting the technical scheme, when the medium-energy-level series preheating mode is adopted, the regulation and control system constructs the series flow path of "primary side main return water pipe renewable energy branch main heat source" through the second valve group instruction, so that the fluid in the primary side main return water pipe is preheated through the renewable energy branch first and then enters the main heat source for heating, and the medium-temperature waste heat value of the renewable energy branch is fully utilized. This series flow path significantly improves the inlet water temperature received by the main heat source, and the main heat source does not need to consume additional energy to heat the cold water to the target water supply temperature, greatly reducing the heating load and energy consumption cost of the main heat source. At the same time, the heat of the renewable energy branch is directly incorporated into the front pretreatment link of the heat network circulation, avoiding the waste of medium-temperature heat energy, realizing the step-by-step energy utilization logic of "waste heat first, main heat source energy supplement", and further improving the comprehensive energy utilization efficiency of the source side of the entire urban heat network.

[0014] In combination with some embodiments of the first aspect, in some embodiments, in a case where it is determined that the energy level matching mode is the high-energy-level parallel heating mode, the corresponding valve switching instruction is generated according to the energy level matching mode, specifically including: based on the high-energy-level parallel heating mode, generating a third valve group instruction, the third valve group instruction being used to control the multi-way valve group to connect the primary side main return water pipe and the inlet of the renewable energy branch, and directly connect the outlet of the renewable energy branch to the primary side main water supply pipe, so that the high-temperature water output by the renewable energy branch and the high-temperature water output by the main heat source are combined in the primary side main water supply pipe.

[0015] By adopting the technical scheme, when the high-energy-level parallel heating mode is adopted, the regulation and control system constructs the topology structure of "renewable energy branch and main heat source parallel connected to the primary side main water supply pipe" through the third valve group instruction, so that the high-temperature water output by the renewable energy branch can directly participate in heating output without being heated twice by the main heat source, maximizing the high-temperature heating potential of the renewable energy. This topology structure makes the renewable energy branch become an independent heating unit, forming a complementary heating pattern with the main heat source, which can not only share the heating pressure of the main heat source when the renewable energy output is sufficient, reducing the energy consumption and operation loss of the main heat source, but also can guarantee the stability of the water supply temperature of the primary side water supply pipe network through the combination of the two high-temperature water flows in the main water supply pipe. At the same time, this topology structure has flexibility, and the regulation and control system can dynamically adjust the heating proportion according to the real-time output of the renewable energy, realizing the collaborative optimization operation of the main heat source and the renewable energy, and improving the reliability and energy saving of the source side heating of the urban heat network. In some embodiments in combination with the first aspect, after the step of generating the corresponding valve switching instruction according to the energy level matching mode, the method further comprises: monitoring the valve opening degree feedback signal of the multi-way valve group in real time during the response of the multi-way valve group to the valve switching instruction; linearly adjusting the circulating pump frequency of the renewable energy branch according to the preset slope with the change of the valve opening degree feedback signal, so that the flow of the renewable energy branch matches the current valve opening degree until the multi-way valve group completes the switching action; monitoring the pipe network pressure in real time through the pressure sensor arranged on the primary side main return water pipe and the primary side main water supply pipe, and if the fluctuation amplitude of the pipe network pressure exceeds the preset safety threshold, the switching action of the multi-way valve group is interrupted and the pressure relief mechanism is triggered.

[0016] By adopting the above technical solution, the control system monitors the valve opening degree feedback signal of the multi-way valve group in real time, and linearly adjusts the circulating pump frequency of the renewable energy branch according to the preset slope, so that the flow of the renewable energy branch dynamically matches the valve opening degree, avoiding hydraulic impact in the switching process. At the same time, the control system monitors the pipe network pressure in real time through the pressure sensor, and automatically triggers the pressure relief mechanism when the fluctuation amplitude of the pipe network pressure exceeds the preset safety threshold, effectively preventing system overpressure. This coordinated control strategy greatly improves the stability and safety of the mode switching process, providing reliable protection for the flexible access of the renewable energy branch.

[0017] In some embodiments in combination with the first aspect, the method further comprises: obtaining renewable energy output prediction data within a future preset time period; calculating the fluctuation frequency and numerical interval of the outlet water temperature within the future preset time period according to the renewable energy output prediction data; when the fluctuation frequency exceeds the preset oscillation threshold and the numerical interval covers the energy level matching mode determination boundary, activating the mode locking mechanism, which is used to shield the valve switching instruction triggered by the mode change within a preset holding time period, so as to maintain the current physical connection state of the multi-way valve group unchanged.

[0018] By adopting the above technical solution, the control system analyzes the fluctuation characteristics of the renewable energy output within the future preset time period, and actively activates the mode locking mechanism when frequent oscillation occurs and the fluctuation range covers the energy level matching mode determination boundary, shielding the valve switching instruction triggered by the mode change within the preset holding time period, effectively avoiding frequent mode switching caused by renewable energy output fluctuation, reducing the loss of system equipment, and improving the operation stability.

[0019] In a second aspect, the embodiments of the present application provide a regulation system, comprising: one or more processors and a memory; the memory is coupled to the one or more processors, and the memory is configured to store computer program codes, the computer program codes comprising computer instructions, and the one or more processors invoke the computer instructions to enable the regulation system to perform the method described in the first aspect and any possible implementation manner of the first aspect.

[0020] In a third aspect, the embodiments of the present application provide a computer program product comprising instructions, which, when executed on a regulation system, cause the regulation system to perform the method described in the first aspect and any possible implementation manner of the first aspect.

[0021] In a fourth aspect, the embodiments of the present application provide a computer-readable storage medium comprising instructions, which, when executed on a regulation system, cause the regulation system to perform the method described in the first aspect and any possible implementation manner of the first aspect.

[0022] It can be understood that the regulation system provided in the second aspect, the computer program product provided in the third aspect, and the computer storage medium provided in the fourth aspect are all used to execute the method provided in the embodiments of the present application. Therefore, the beneficial effects that can be achieved thereby can refer to the beneficial effects in the corresponding method, which will not be described here again.

[0023] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. By adopting the above technical solution, the regulation system collects the real-time return water temperature of the primary side main return water pipe, the target water supply temperature of the primary side main water supply pipe, and the outlet water temperature of the renewable energy branch, to determine the physical topology structure of the renewable energy branch connected to the source side of the urban heat network, and accordingly adjust the valve opening degree and flow path connection of the multi-way valve group. This self-adaptive heat network source side renewable energy regulation method can flexibly adjust the connection mode of the renewable energy at the source side of the urban heat network according to the output change of the renewable energy, avoid invalid circulation while ensuring the heat exchange effect, and thus improve the utilization efficiency of the renewable energy.

[0024] 2. By adopting the above technical solution, the regulation system divides the energy level matching mode into three levels: when the temperature difference between the outlet water temperature and the real-time return water temperature is less than the effective heat exchange threshold, a low-energy level bypass mode is adopted to avoid invalid heat exchange; when the temperature difference between the outlet water temperature and the real-time return water temperature is greater than or equal to the effective heat exchange threshold and the outlet water temperature is less than the target water supply temperature, a medium-energy level series preheating mode is adopted to make full use of waste heat; and when the outlet water temperature is greater than or equal to the target water supply temperature, a high-energy level parallel heating mode is adopted to directly participate in heat supply. This hierarchical control strategy not only ensures the heat exchange efficiency, but also realizes hierarchical utilization, so that the renewable energy branch always works in the best connection mode.

[0025] 3、By adopting the technical scheme, the regulating system monitors the valve opening degree feedback signal of the multi-way valve group in real time, and linearly adjusts the circulating pump frequency of the renewable energy branch according to the valve opening degree feedback signal, so as to ensure that the flow of the renewable energy branch dynamically matches the valve opening degree, and hydraulic impact in the switching process is avoided. Meanwhile, the regulating system monitors the pipe network pressure in real time through the pressure sensor, and automatically triggers the pressure relief mechanism when the fluctuation amplitude of the pipe network pressure exceeds the preset safety threshold, so that overpressure of the system is effectively prevented. The coordinated control strategy greatly improves the stability and safety of the mode switching process, and provides reliable guarantee for flexible access of the renewable energy branch. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a physical topology structure schematic diagram corresponding to the low-energy-level bypass mode of the energy level matching mode in the embodiment of the present application; Figure 2 is a physical topology structure schematic diagram corresponding to the medium-energy-level series preheating mode of the energy level matching mode in the embodiment of the present application; Figure 3 is a physical topology structure schematic diagram corresponding to the high-energy-level parallel heating mode of the energy level matching mode in the embodiment of the present application; Figure 4 is a flow schematic diagram of a heat network source side renewable energy regulating method in the embodiment of the present application; Figure 5 is another flow schematic diagram of a heat network source side renewable energy regulating method in the embodiment of the present application; Figure 6 is a physical device structure schematic diagram of a regulating system in the embodiment of the present application. DETAILED DESCRIPTION

[0027] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to be limiting on the present application. As used in the specification of the present application, the singular expression "one", "a", "the", "said" and "this" are intended to also include the plural expression, unless there is clear indication to the contrary in the context. It should also be understood that the term "and / or" used in the present application means any or all possible combinations of one or more listed items.

[0028] Hereinafter, the terms "first", "second" are only for the purpose of description, and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specified.

[0029] The following introduces the valve control method corresponding to the energy level matching mode (low energy level bypass mode, medium energy level series preheating mode, and high energy level parallel heating mode) in this application.

[0030] Please refer to Figure 1 , Figure 2 and Figure 3 These three figures show the physical topology and fluid path under different energy level matching modes at the source side of the urban heat network.

[0031] General element description: Primary side main return water pipe (from the city): The pipe at the source side of the urban heat network for collecting the return water of each heat exchange device of the urban heat network.

[0032] Primary side main water supply pipe (to the city): The pipe at the source side of the urban heat network for delivering the heated hot water to each heat exchange device of the urban heat network.

[0033] Main heat source (boiler): The basic heat load supply source at the source side of the urban heat network, usually coal-fired or gas-fired boiler, etc.

[0034] Renewable energy (branch circuit): Independent circuit for heat recovery or supplementary heating through renewable energy devices (such as solar heat collection, geothermal, industrial waste heat recovery, etc.).

[0035] Valve A (inlet) and valve B (multi-pass switching): Part of the multi-pass valve group, their switching changes the connection mode of the renewable energy branch circuit in the source side of the urban heat network.

[0036] Colored lines: Represent the active path of water flow at the current time.

[0037] Next, introduce these three figures one by one: Figure 1 Low energy level bypass mode.

[0038] Features: In this mode, the renewable energy branch circuit is completely isolated and in its own circulation state, not exchanging heat with the main circulation of the urban heat network.

[0039] Fluid path: The return water in the primary side main return water pipe (blue line) directly enters the main heat source (boiler) for heating; the high-temperature water after heating of the main heat source (red line) directly enters the primary side main water supply pipe and is sent to the city.

[0040] Renewable energy branch circuit: Through the switching of valve B, the fluid communication between it and the primary side main return water pipe is cut off; its own internal circulation bypass valve is opened to maintain the minimum operating requirement of the device, but it no longer participates in the main network heating.

[0041] Application scenario: When the temperature difference between the outlet water temperature of the renewable energy branch and the real-time return water temperature is too small (less than the preset effective heat exchange threshold), the heat exchange efficiency is low, and even energy waste may occur. This mode is used to avoid ineffective energy loss and interference with the main cycle.

[0042] Figure 2 : Medium-energy-level series preheating mode.

[0043] Features: In this mode, the renewable energy branch serves as a preheating link before the main heat source, forming a series relationship with the main heat source.

[0044] Fluid path: The return water in the primary side main return water pipe (blue line) first enters the renewable energy branch through valve A; in the renewable energy branch, the return water is initially heated (orange line represents the water flow heated by renewable energy); the water preheated by the renewable energy branch (orange line) enters the main heat source (boiler) for further heating through valve B; the high-temperature water heated by the main heat source (red line) enters the primary side main water supply pipe and is sent to the city.

[0045] Application scenario: When the outlet water temperature of the renewable energy branch is higher than the real-time return water temperature, but not enough to reach the target water supply temperature (i.e., there is preheating value but cannot directly supply heat), this mode is used to fully utilize the medium-temperature heat of renewable energy and improve the inlet water temperature of the main heat source, thereby significantly reducing the heating load and energy consumption of the main heat source.

[0046] Figure 3 : High-energy-level parallel heating mode.

[0047] Features: In this mode, the renewable energy branch serves as an independent heating unit and is connected in parallel with the main heat source to the primary side main water supply pipe.

[0048] Fluid path: The return water in the primary side main return water pipe (blue line) is divided into two parts: one part directly enters the main heat source (boiler) for heating, and the other part enters the renewable energy branch through valve A for heating; the high-temperature water heated by the main heat source (red line) enters the primary side main water supply pipe; the high-temperature water heated by the renewable energy branch (red line) also directly enters the primary side main water supply pipe through valve B and is combined with the high-temperature water produced by the main heat source.

[0049] Application scenario: When the outlet water temperature of the renewable energy branch can reach or be higher than the target water supply temperature, this mode is used, which means that renewable energy can directly provide high-temperature heating for the heat network, maximize its heating potential, share the heating pressure of the main heat source, and reduce fossil fuel consumption.

[0050] Through the intelligent switching of the three modes, the regulation system can flexibly adjust the access mode of the renewable energy at the source side of the urban heat supply network according to the real-time output of the renewable energy, so as to realize efficient utilization of the renewable energy, save traditional energy consumption, and guarantee stable operation of the urban heat supply system.

[0051] The method provided by the embodiment is described below in a flow. Please refer to Figure 4 FIG. 1 is a flowchart of a renewable energy regulation method at a source side of a heat supply network according to an embodiment of the present application.

[0052] S401, collecting a real-time return water temperature of a primary side main return water pipe, a target water supply temperature of a primary side main water supply pipe, and an outlet water temperature of a renewable energy branch at a current time; The real-time return water temperature is the actual temperature value of the hot water flowing in the primary side main return water pipe at the current time, reflecting the hot water temperature state after heat exchange of each heat exchange device of the urban heat supply network. The target water supply temperature represents the expected hot water temperature value to be reached in the primary side main water supply pipe, which is determined by the urban heat supply system according to user demand, outdoor temperature and other factors. The outlet water temperature is the hot water temperature value measured at the outlet of the renewable energy branch after the renewable energy device transmits heat to the circulating water, reflecting the current heat supply capacity of the renewable energy device.

[0053] The regulation system continuously collects temperatures during the operation of the urban heat supply network. Specifically, the regulation system collects temperature data of three key points in real time through temperature sensors arranged at the primary side main return water pipe, the primary side main water supply pipe, and the outlet of the renewable energy branch. The temperature sensors can be standard PT100 or PT1000 temperature sensors, and the sampling period is usually 1-5 minutes. The collected temperature data is transmitted to the regulation system for processing after signal conditioning and digital conversion.

[0054] S402, comparing the outlet water temperature with the real-time return water temperature and the target water supply temperature respectively, and determining an energy level matching mode of the renewable energy branch at the current time, the energy level matching mode including one of a low energy level bypass mode, a medium energy level series preheating mode, and a high energy level parallel heat supply mode; The energy level matching mode refers to the connection mode between the renewable energy branch and the main water supply and return pipe, including the low energy level bypass mode, the medium energy level series preheating mode, and the high energy level parallel heat supply mode. The low energy level bypass mode means that the renewable energy branch is isolated and in a self-circulation state, without heat exchange with the main circulation of the urban heat supply network. The medium energy level series preheating mode means that the renewable energy branch is connected in series between the primary side main return water pipe and the main heat source for preheating. The high energy level parallel heat supply mode means that the renewable energy branch is connected in parallel with the main heat source to the primary side main water supply pipe for heat supply.

[0055] The regulation system judges the energy level matching mode immediately after collecting the temperature. Specifically, the regulation system compares the outlet water temperature of the renewable energy branch with the real-time return water temperature of the primary side main return water pipe. If the temperature difference between the outlet water temperature of the renewable energy branch and the real-time return water temperature is too small (less than the preset effective heat exchange threshold), it is determined to be a low energy level bypass mode. If the outlet water temperature of the renewable energy branch is higher than the real-time return water temperature, but is not enough to reach the target water supply temperature, it is determined to be a medium energy level series preheating mode. If the outlet water temperature is greater than or equal to the target water supply temperature, it is determined to be a high energy level parallel heating mode. The whole judgment process follows the logical order of "first judging the heat exchange condition, and then judging the energy level".

[0056] Optionally, in general, the outlet water temperature is compared with the real-time return water temperature and the target water supply temperature respectively to determine the energy level matching mode of the renewable energy branch at the current time. The energy level matching mode includes one of a low energy level bypass mode, a medium energy level series preheating mode and a high energy level parallel heating mode, which can be realized by the following way, which is not limited herein: calculating the temperature difference between the outlet water temperature and the real-time return water temperature; when the temperature difference is less than the preset effective heat exchange threshold, determining the energy level matching mode to be a low energy level bypass mode; when the temperature difference is greater than or equal to the effective heat exchange threshold and the outlet water temperature is less than the target water supply temperature, determining the energy level matching mode to be a medium energy level series preheating mode; when the outlet water temperature is greater than or equal to the target water supply temperature, determining the energy level matching mode to be a high energy level parallel heating mode.

[0057] S403, according to the energy level matching mode, a corresponding valve switching instruction is generated, which is used to control the flow path switching of the multi-way valve group arranged between the renewable energy branch and the primary side main return water pipe and the primary side main water supply pipe, so as to change the physical topology structure of the renewable energy branch connected to the source side of the urban heat network.

[0058] Wherein, the valve switching instruction refers to the control signal used to control the action of the multi-way valve group, which contains valve opening, action time sequence and other information; the multi-way valve group represents the combination of multiple control valves arranged between the renewable energy branch and the primary side main return water pipe and the primary side main water supply pipe, which is used to realize the switching of different flow paths; the physical topology structure refers to the actual connection mode between the renewable energy branch and the main supply and return water pipe.

[0059] The control system executes valve control after determining the energy level matching mode. Specifically, the control system queries a preset valve action configuration table according to the determined energy level matching mode to generate an instruction sequence containing target opening values of each valve. For the low-energy-level bypass mode, a first valve group instruction is generated; for the medium-energy-level series preheating mode, a second valve group instruction is generated; and for the high-energy-level parallel heating mode, a third valve group instruction is generated. The control system sends the generated valve switching instruction to the actuator of the multi-way valve group through the field bus to realize switching of the physical connection mode. The valve switching process adopts a slow and gradual mode to avoid hydraulic impact.

[0060] Optionally, generally, in the case where the energy level matching mode is determined to be the low-energy-level bypass mode, generating the corresponding valve switching instruction according to the energy level matching mode can be implemented in the following manner, which is not limited herein: based on the low-energy-level bypass mode, a first valve group instruction is generated, which is used to control the multi-way valve group to cut off the fluid communication between the renewable energy source branch and the primary side main return water pipe, and simultaneously open the internal circulation bypass valve of the renewable energy source branch itself.

[0061] Optionally, generally, in the case where the energy level matching mode is determined to be the medium-energy-level series preheating mode, generating the corresponding valve switching instruction according to the energy level matching mode can be implemented in the following manner, which is not limited herein: based on the medium-energy-level series preheating mode, a second valve group instruction is generated, which is used to control the multi-way valve group to connect the inlet of the renewable energy source branch to the primary side main return water pipe and connect the outlet of the renewable energy source branch to the main heat source, so that the fluid in the primary side main return water pipe first flows through the renewable energy source branch for preheating and then enters the main heat source.

[0062] Optionally, generally, in the case where the energy level matching mode is determined to be the high-energy-level parallel heating mode, generating the corresponding valve switching instruction according to the energy level matching mode can be implemented in the following manner, which is not limited herein: based on the high-energy-level parallel heating mode, a third valve group instruction is generated, which is used to control the multi-way valve group to connect the inlet of the renewable energy source branch to the primary side main return water pipe and directly connect the outlet of the renewable energy source branch to the primary side main supply water pipe, so that the high-temperature water produced by the renewable energy source branch and the high-temperature water produced by the main heat source are combined in the primary side main supply water pipe.

[0063] By adopting the technical scheme, the real-time return water temperature of the primary side main return water pipe, the target water supply temperature of the primary side main water supply pipe and the outlet water temperature of the renewable energy branch are collected by the regulation system to determine the physical topology structure of the renewable energy branch connected to the source side of the city heat supply network, and the valve opening degree and flow path connection of the multi-way valve group are adjusted accordingly. The adaptive heat supply network source side renewable energy regulation method can flexibly adjust the connection mode of the renewable energy at the source side of the city heat supply network according to the output change of the renewable energy, avoid invalid circulation while ensuring the heat exchange effect, and improve the utilization efficiency of the renewable energy.

[0064] The method provided by the embodiment will be further described in a more specific flow. Figure 5 Another flow diagram of the heat supply network source side renewable energy regulation method in the embodiment is shown in the following.

[0065] After step S403, the following steps can also be performed, or not, which is not limited here: S501, in the process that the multi-way valve group responds to the valve switching instruction, the valve opening degree feedback signal of the multi-way valve group is monitored in real time.

[0066] The valve opening degree feedback signal represents the state data of the actual opening or closing degree of each valve in the multi-way valve group; the multi-way valve group refers to a valve combination device composed of multiple electric regulating valves, used to realize flow path switching under different energy level matching modes; real-time monitoring refers to the process of continuously collecting data at a high frequency (such as 100 ms); the process that the multi-way valve group responds to the valve switching instruction refers to the entire time period from when the multi-way valve group receives the valve switching instruction to when it completes the valve switching instruction.

[0067] Specifically, the regulation system continuously collects the actual opening degree data of each valve through the angle sensor or stroke sensor on the valve actuator, and the actual opening degree data is converted to a unified range of 0-100% after standardized processing. The regulation system compares the real-time opening degree data with the target opening degree value of the valve switching instruction to generate an opening degree deviation curve for evaluating the execution state of the switching process. At the same time, the regulation system also detects the continuity and synchronicity of valve action, and alarms in time when abnormal conditions such as jamming and out of step are found.

[0068] S502, the frequency of the circulating pump of the renewable energy branch is linearly adjusted according to the preset slope with the change of the valve opening degree feedback signal, so that the flow of the renewable energy branch matches the current valve opening degree until the multi-way valve group completes the switching action.

[0069] Wherein, the circulating pump frequency represents the operating speed of the circulating water pump in the renewable energy branch; the preset slope refers to the set change rate of the circulating pump frequency with the valve opening degree; the linear adjustment represents the process of step-by-step adjustment in proportional relationship; the flow of the renewable energy branch matched with the current valve opening degree refers to the state that the actual flow in the renewable energy branch is adapted to the valve flow capacity.

[0070] Specifically, first, the regulation system calculates the theoretical flow capacity under the current valve opening degree according to the pre-labeled valve flow characteristic curve. Then, the regulation system gradually adjusts the circulating pump frequency through the frequency converter according to the preset slope (such as 2Hz / s), so that the flow of the renewable energy branch is matched with the current valve opening degree. During the adjustment process, the regulation system continuously monitors the flow of the renewable energy branch through the flow meter, and fine-tunes the circulating pump frequency according to the feedback results, until the multi-way valve group completes the switching action and the flow of the renewable energy branch is stabilized at the preset flow. This coordinated control method can effectively avoid hydraulic impact and improve system stability.

[0071] S503, real-time monitoring of the pipe network pressure through the pressure sensor arranged on the primary side main return water pipe and the primary side main water supply pipe, if the fluctuation amplitude of the pipe network pressure exceeds the preset safety threshold, the switching action of the multi-way valve group is interrupted and the pressure relief mechanism is triggered.

[0072] Wherein, the pressure sensor refers to an instrument device for measuring fluid pressure; the pipe network pressure refers to the actual pressure value of the fluid in the pipeline; the fluctuation amplitude represents the maximum change of the actual pressure value from the normal pressure value; the preset safety threshold refers to the maximum allowable pressure fluctuation range; the pressure relief mechanism refers to the protection measures to reduce the system pressure by opening the pressure relief valve and the like.

[0073] Specifically, the regulation system acquires the pipe network pressure in real time through the pressure sensors distributed on the primary side main return water pipe and the primary side main water supply pipe. When it is monitored that the fluctuation amplitude of the pipe network pressure exceeds the preset safety threshold (such as 0.2MPa), the regulation system immediately performs three actions: first, interrupt the ongoing valve switching, keep each valve at the current position; then start the nearby pressure relief valve for pressure relief; finally, reduce the circulating pump frequency to reduce the flow. When the pipe network pressure returns to the safety range, the regulation system re-evaluates the operating conditions to decide whether to continue the previous switching action. This timely intervention mechanism can effectively prevent system overpressure and ensure the safe operation of equipment and pipe network.

[0074] S504, obtaining renewable energy output prediction data within a preset time length in the future.

[0075] The future preset time length represents a predicted time range (such as 2 hours in the future) from the current time; the renewable energy output prediction data refers to estimated data of the heat output capacity of the renewable energy device within the future preset time length, including time series of key operating parameters such as thermal power and outlet temperature; and the obtaining process represents an operation of reading the renewable energy output prediction data from a prediction model or an external data source.

[0076] Specifically, the regulation system obtains the renewable energy output prediction data within the future preset time length from the renewable energy prediction system through a preset data interface. The renewable energy output prediction data can be derived from weather forecasts (for solar energy), working condition predictions (for industrial waste heat), or historical statistical models. The regulation system standardizes the obtained raw data, unifies the time resolution (such as 1 minute) and numerical units, and performs validity verification to eliminate obvious outliers, and finally forms standardized renewable energy output prediction data.

[0077] S505, according to the renewable energy output prediction data, the fluctuation frequency and numerical interval of the outlet water temperature within the future preset time length are calculated.

[0078] The fluctuation frequency represents the number of times of significant changes of the outlet water temperature within a unit time; the numerical interval refers to an interval composed of the expected maximum value and the expected minimum value of the outlet water temperature; and the significant change refers to a case where the temperature change amplitude exceeds a preset sensitivity.

[0079] Specifically, first, the regulation system performs time domain analysis on the outlet water temperature prediction data (extracted from the renewable energy output prediction data), identifies the main fluctuation period through fast Fourier transform, and calculates the number of times of significant changes of the outlet water temperature within a unit time as the fluctuation frequency. At the same time, the regulation system statistics the extreme value distribution of the outlet water temperature prediction data, determines the upper and lower limits of the temperature fluctuation, and obtains the numerical interval. In the calculation process, the regulation system will consider the measurement error and prediction uncertainty, and appropriately expand the boundaries of the numerical interval.

[0080] S506, when the fluctuation frequency exceeds the preset oscillation threshold and the numerical interval covers the energy level matching mode determination boundary, the mode locking mechanism is activated. The mode locking mechanism is used to shield the valve switching instructions triggered by the mode change within a preset holding time, so as to maintain the current physical connection state of the multi-way valve group unchanged.

[0081] The preset oscillation threshold represents the maximum allowed fluctuation frequency limit; the energy level matching mode determination boundary refers to the temperature critical value between different energy level matching modes; the mode locking mechanism represents a control strategy for temporarily fixing the energy level matching mode; and the preset holding time represents the duration of the mode locking.

[0082] Specifically, the control system compares the calculated fluctuation frequency with a preset fluctuation threshold (e.g. 6 times / hour), and checks whether the numerical interval has crossed the energy level matching mode judgment boundary (e.g. the effective heat exchange threshold of low energy level bypass mode to medium energy level series preheating mode, or the target water supply temperature of medium energy level series preheating mode to high energy level parallel heating mode). When both of the above conditions are met, the control system activates the mode locking mechanism: records the current energy level matching mode and the physical connection state of the multi-way valve group as the locked configuration; does not perform mode switching within a preset holding duration (e.g. 30 minutes); and only releases the lock when a safety hazard such as overpressure occurs. This mechanism can avoid system fluctuation caused by frequent switching, and improve the operation stability.

[0083] The control system in the embodiments of the present application will be described from the perspective of hardware processing. Please refer to Figure 6 , which is a schematic diagram of an entity device structure of the control system in the embodiments of the present application.

[0084] It should be noted that Figure 6 The structure of the control system shown is only an example, and should not impose any limitation on the functions and use range of the embodiments of the present application.

[0085] As Figure 6 shown, the control system includes a CPU 601, which can perform various appropriate actions and processes according to programs stored in a read-only memory ROM 602 or loaded from a storage portion 608 to a random access memory RAM 603, such as performing the methods described in the above embodiments. In the RAM 603, various programs and data required for system operation are also stored. The CPU 601, the ROM 602, and the RAM 603 are connected to each other through a bus 604. An I / O interface 605 is also connected to the bus 604.

[0086] The following components are connected to the I / O interface 605: an input portion 606 including an audio input device, a button switch, and the like; an output portion 607 including a liquid crystal display (LCD) and an audio output device, an indicator, and the like; a storage portion 608 including a hard disk and the like; and a communication portion 609 including a network interface card such as a LAN (Local Area Network) card, a modem, and the like. The communication portion 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. A removable medium 611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, and the like is mounted on the drive 610 as needed, so that a computer program read therefrom is installed in the storage portion 608 as needed.

[0087] In particular, the processes described above with reference to the flow charts can be implemented as a computer software program according to embodiments of the present application. For example, embodiments of the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program comprising computer programs for executing the methods illustrated by the flow charts. In such embodiments, the computer program can be downloaded and installed from a network via the communication section 609, and / or installed from the removable media 611. When the computer program is executed by the CPU 601, various functions defined in the present application are executed.

[0088] Note that specific examples of the computer readable storage medium can include one or more of the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present application, the computer readable storage medium can be any tangible medium that can contain or store a program for use by or in connection with an instruction execution system, apparatus, or device.

[0089] The flow charts and block diagrams in the drawings are illustrations of possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present application. Each block in the flow charts or block diagrams can represent a module, a segment, or a portion of code that comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures.

[0090] Specifically, the regulation system of the embodiment includes a processor and a memory, and the memory stores a computer program. When the computer program is executed by the processor, the heat network source side renewable energy regulation method provided by the above embodiment is implemented.

[0091] As another aspect, the present application also provides a computer readable storage medium. The storage medium can be included in the regulation system described in the above embodiments, or can exist independently without being assembled into the regulation system. The storage medium carries one or more computer programs. When the one or more computer programs are executed by a processor of the regulation system, the regulation system implements the heat network source side renewable energy regulation method provided in the above embodiments.

[0092] The above-described embodiments are merely intended for describing and illustrating, but not limiting the technical solutions of the present application; even though the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0093] In the above-described embodiments, according to the context, the term “when” can be interpreted to mean “if” or “after” or “in response to determining” or “in response to detecting”. Similarly, according to the context, the phrase “upon determining” or “if detecting (the stated condition or event)” can be interpreted to mean “if determining” or “in response to determining” or “upon detecting (the stated condition or event)” or “in response to detecting (the stated condition or event)”.

[0094] Those of ordinary skill in the art can understand that all or part of the processes in the above-described embodiments can be implemented by a computer program instructing relevant hardware, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above-described embodiments. The foregoing storage medium includes ROM or random access memory (RAM), magnetic or optical disks, and various other storage media that can store program codes.

Claims

1. A heat network source side renewable energy regulation method, characterized in that, The application is applied to a regulation and control system of a city heat network source side, the city heat network source side further comprises a primary side main return water pipe, a primary side main water supply pipe, a main heat source and a renewable energy branch, the primary side main return water pipe is used for collecting return water of each heat exchange device of the city heat network and returning to the city heat network source side for reheating, the primary side main water supply pipe is used for conveying heated water of the city heat network source side to each heat exchange device of the city heat network for heating, the main heat source represents a basic heat load supply source of the city heat network source side, the renewable energy branch is used for heat recovery or supplementary heating through a renewable energy device, and the method comprises: collecting real-time return water temperature of the primary side main return water pipe, target water supply temperature of the primary side main water supply pipe and outlet water temperature of the renewable energy branch at the current moment; comparing the outlet water temperature with the real-time return water temperature and the target water supply temperature respectively to determine an energy level matching mode of the renewable energy branch at the current moment, the energy level matching mode comprises one of a low energy level bypass mode, a medium energy level series preheating mode and a high energy level parallel heating mode; generating corresponding valve switching instructions according to the energy level matching mode, the valve switching instructions are used for controlling a multi-way valve group arranged between the renewable energy branch and the primary side main return water pipe and the primary side main water supply pipe to switch flow paths to change a physical topology structure of the renewable energy branch accessing the city heat network source side.

2. The method of claim 1, wherein, The comparison of the outlet water temperature with the real-time return water temperature and the target water supply temperature respectively to determine the energy level matching mode of the renewable energy branch at the current moment, the energy level matching mode comprises one of the low energy level bypass mode, the medium energy level series preheating mode and the high energy level parallel heating mode, and specifically comprises: calculating a temperature difference between the outlet water temperature and the real-time return water temperature; when the temperature difference is less than a preset effective heat exchange threshold, determining that the energy level matching mode is the low energy level bypass mode; when the temperature difference is greater than or equal to the effective heat exchange threshold and the outlet water temperature is less than the target water supply temperature, determining that the energy level matching mode is the medium energy level series preheating mode; when the outlet water temperature is greater than or equal to the target water supply temperature, determining that the energy level matching mode is the high energy level parallel heating mode.

3. The method of claim 2, wherein, In a case where it is determined that the energy level matching mode is the low energy level bypass mode, the generation of the corresponding valve switching instructions according to the energy level matching mode specifically comprises: generating a first valve group instruction based on the low energy level bypass mode, the first valve group instruction is used for controlling the multi-way valve group to cut off fluid communication between the renewable energy branch and the primary side main return water pipe and simultaneously open an internal circulation bypass valve of the renewable energy branch.

4. The method of claim 2, wherein, In a case where it is determined that the energy level matching mode is the medium energy level series preheating mode, the generation of the corresponding valve switching instructions according to the energy level matching mode specifically comprises: Based on the medium energy level series preheating mode, a second valve group instruction is generated, which is used to control the multi-way valve group to connect the primary side main return water pipe with the inlet of the renewable energy branch, and connect the outlet of the renewable energy branch to the main heat source, so that the fluid in the primary side main return water pipe first flows through the renewable energy branch for preheating, and then enters the main heat source.

5. The method of claim 2, wherein, In a case where it is determined that the energy level matching mode is the high energy level parallel heating mode, the valve switching instruction corresponding to the energy level matching mode is generated, specifically including: Based on the high energy level parallel heating mode, a third valve group instruction is generated, which is used to control the multi-way valve group to connect the primary side main return water pipe with the inlet of the renewable energy branch, and directly connect the outlet of the renewable energy branch to the primary side main water supply pipe, so that the high-temperature water produced by the renewable energy branch and the high-temperature water produced by the main heat source are combined in the primary side main water supply pipe.

6. The method of claim 1, wherein, After the step of generating the valve switching instruction corresponding to the energy level matching mode, the method further includes: In the process that the multi-way valve group responds to the valve switching instruction, the valve opening degree feedback signal of the multi-way valve group is monitored in real time; The frequency of the circulating pump of the renewable energy branch is linearly adjusted according to a preset slope according to the change of the valve opening degree feedback signal, so that the flow of the renewable energy branch matches the current valve opening degree until the multi-way valve group completes the switching action; The pressure sensor arranged on the primary side main return water pipe and the primary side main water supply pipe is used to monitor the pipe network pressure in real time, and if the fluctuation amplitude of the pipe network pressure exceeds a preset safety threshold, the switching action of the multi-way valve group is interrupted and a pressure relief mechanism is triggered.

7. The method of claim 1, wherein, The method further includes: Obtaining renewable energy output prediction data in a future preset time period; According to the renewable energy output prediction data, the fluctuation frequency and numerical interval of the outlet water temperature in the future preset time period are calculated; When the fluctuation frequency exceeds a preset oscillation threshold and the numerical interval covers the energy level matching mode determination boundary, a mode locking mechanism is activated, which is used to shield the valve switching instruction triggered by the mode change in a preset holding time period, so as to maintain the current physical connection state of the multi-way valve group unchanged.

8. A regulation system, characterized by The regulation system includes one or more processors and a memory; the memory is coupled with the one or more processors, and the memory is used to store computer program codes, the computer program codes include computer instructions, and the one or more processors invoke the computer instructions to make the regulation system execute the method in any one of claims 1-7.

9. A computer-readable storage medium comprising instructions, characterized in that, When the instructions run on the regulation system, the regulation system executes the method in any one of claims 1-7.

10. A computer program product, characterised in that, When the computer program product runs on the regulation system, the regulation system executes the method in any one of claims 1-7.

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