A heat source group control method, device, system and storage medium

Abstract

The application provides a heat supply unit control method, device, system and storage medium, and belongs to the field of power generation control. The method comprises the following steps: calculating the heat supply pipe network storage energy according to the total mass of pipe steel, the heat supply steam pressure and the heat supply steam flow, obtaining the AGC load adjustment deviation according to the actual load parameter and the AGC load instruction parameter of the unit, and obtaining the AGC heat supply adjustment flow according to the heat supply pipe network storage energy and the AGC load adjustment deviation; analyzing the control signal of the actual pressure of the heat supply main pipe and the set pressure of the heat supply main pipe, and obtaining the heat supply auxiliary AGC allowed signal according to the control signal. The application realizes the high-speed variable load operation of the heat supply unit under the constraint condition of the heat supply steam extraction amount, realizes the heat and power cogeneration unit auxiliary AGC by using the heat network storage energy, improves the AGC adjustment quality of the unit, has good applicability and wide application prospect, and also guarantees the safe operation of the unit and excavates the maximum potential of the unit.

Description

Technical Field

[0001] This invention relates primarily to the field of power generation control technology, specifically to a method, device, system, and storage medium for controlling a heating unit group. Background Technology

[0002] In current energy generation, wind power and solar power have significant randomness, volatility and intermittency. Therefore, it is urgent for traditional coal-fired power units to participate in peak shaving to balance the volatility of their electrical load. To this end, improving the flexibility of existing coal-fired power units provides a guarantee for the stable operation of the power grid after the large-scale integration of new energy sources.

[0003] Nowadays, regional power grids have placed higher demands on parameters such as primary frequency regulation, AGC (Automatic Generation Control) regulation rate, and AGC regulation accuracy of generating units, and require generating units to respond quickly to grid loads and ensure the correct operation rate and effectiveness of primary frequency regulation under coordinated mode.

[0004] Currently, coal-fired power units generally suffer from problems such as poor accuracy in tracking variable loads, large fluctuations in steam temperature and pressure, and thermoelectric coupling. On the surface, these are issues related to spot market dispatching methods, combustion, coal quality, control strategies, and heat distribution. However, the core problem lies in the fact that conventional control strategies cannot meet the demands of thermoelectric coupling and high-speed load control, and cannot establish accurate control models.

[0005] Because coal-fired power units vary in type and thermal system characteristics, corresponding control strategies need to be optimized and improved based on the different characteristics of each unit. These strategies must not only meet the high performance requirements of the power grid but also ensure the stability of parameters such as pressure and steam temperature within the unit itself, guaranteeing safe operation and maximizing its potential. This will enable the unit to better adapt to the implemented assessment standards. As a crucial component of the heating system, the storage capacity of the heating network is receiving increasing attention. Heating unit clusters directly impact the efficiency of the heating network. Traditional heating unit clusters cannot operate at high-rate variable loads under constraints on the amount of steam extracted for heating, resulting in insufficient AGC (Automatic Gain Control) quality. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a method, device, system and storage medium for controlling heating units, which addresses the shortcomings of the prior art.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A method for controlling a heating unit group, comprising the following steps:

[0008] Import the total mass of pipeline steel, AGC load command parameters, set pressure of heating main pipe, initial value of heating capacity, heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of heating main pipe. The heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of heating main pipe are obtained from the heating unit group.

[0009] The energy storage of the heating network is calculated based on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate. The AGC load adjustment deviation is obtained based on the actual load parameters of the unit and the AGC load command parameters. The AGC heating adjustment flow rate is obtained based on the energy storage of the heating network and the AGC load adjustment deviation.

[0010] Analyze the control signal between the actual pressure of the heating main pipe and the set pressure of the heating main pipe, and obtain the heating auxiliary AGC allow signal based on the control signal;

[0011] The initial value of the heating capacity is updated based on the heating auxiliary AGC allow signal and the AGC heating regulation flow rate to obtain the updated value of the heating capacity for controlling the heating unit group.

[0012] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: A heating unit group control device, comprising:

[0013] The data import module is used to import the total mass of pipeline steel, AGC load command parameters, set pressure of the heating main pipe, initial value of heating capacity, heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of the heating main pipe. The heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of the heating main pipe are obtained from the heating unit group.

[0014] The calculation module is used to calculate the energy storage of the heating network based on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate; to obtain the AGC load adjustment deviation based on the actual load parameters of the unit and the AGC load command parameters; and to obtain the AGC heating adjustment flow rate based on the energy storage of the heating network and the AGC load adjustment deviation.

[0015] The analysis module is used to analyze the control signal of the actual pressure of the heating main pipe and the set pressure of the heating main pipe, and obtain the heating auxiliary AGC allow signal based on the control signal;

[0016] The update value acquisition module is used to update the initial value of the heating capacity based on the heating auxiliary AGC allow signal and the AGC heating regulation flow rate, so as to obtain the updated value of the heating capacity for controlling the heating unit group.

[0017] Based on the above-mentioned heating unit group control method, the present invention also provides a heating unit group control system.

[0018] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: a heating group control system, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the heating group control method described above is implemented.

[0019] Based on the above-mentioned heating unit group control method, the present invention also provides a computer-readable storage medium.

[0020] Another technical solution of the present invention to solve the above-mentioned technical problems is as follows: a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the heating group control method as described above.

[0021] The beneficial effects of this invention are as follows: The energy storage of the heating network is calculated using the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate. The AGC load adjustment deviation is obtained based on the actual load parameters of the unit and the AGC load command parameters. The AGC heating adjustment flow rate is obtained based on the energy storage of the heating network and the AGC load adjustment deviation. The control signals of the actual pressure and set pressure of the heating main pipe are analyzed. The heating auxiliary AGC allowance signal is obtained based on the control signal. The updated heating value for controlling the heating unit group is obtained based on the update of the initial heating value using the heating auxiliary AGC allowance signal and the AGC heating adjustment flow rate. This achieves high-speed variable load operation of the heating unit group under the constraint of heating steam extraction, and also realizes the use of the combined heat and power unit group's energy storage to assist AGC, improving the quality of the unit's AGC adjustment. It has good applicability and broad application prospects, while also ensuring the safe operation of the unit and tapping the unit's maximum potential. Attached Figure Description

[0022] Figure 1 A schematic flowchart of a heating unit group control method provided in an embodiment of the present invention;

[0023] Figure 2 This is a module block diagram of a heating unit group control device provided in an embodiment of the present invention. Detailed Implementation

[0024] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0025] Figure 1 This is a flowchart illustrating a heating unit group control method provided in an embodiment of the present invention.

[0026] like Figure 1 As shown, a method for controlling a heating unit group includes the following steps:

[0027] Import the total mass of pipeline steel, AGC load command parameters, set pressure of heating main pipe, initial value of heating capacity, heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of heating main pipe. The heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of heating main pipe are obtained from the heating unit group.

[0028] The energy storage of the heating network is calculated based on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate. The AGC load adjustment deviation is obtained based on the actual load parameters of the unit and the AGC load command parameters. The AGC heating adjustment flow rate is obtained based on the energy storage of the heating network and the AGC load adjustment deviation.

[0029] Analyze the control signal between the actual pressure of the heating main pipe and the set pressure of the heating main pipe, and obtain the heating auxiliary AGC allow signal based on the control signal;

[0030] The initial value of the heating capacity is updated based on the heating auxiliary AGC allow signal and the AGC heating regulation flow rate to obtain the updated value of the heating capacity for controlling the heating unit group.

[0031] It should be understood that AGC, or Automatic Generation Control, is an important function in the Energy Management System (EMS). It controls the output of frequency regulation units to meet the ever-changing power demands of users and to keep the system in an economical operating state.

[0032] It should be understood that the heating steam pressure, heating steam flow rate, actual unit load parameters, and actual heating header pressure are obtained from the heating steam pressure gauge, flow meter, electricity meter, and heating header pressure gauge installed on the heating unit group.

[0033] It should be understood that the heating unit group consists of at least two heating units, each of which has AGC function. Each heating unit supplies steam to the heating network with either cold reheat steam or hot reheat steam, and each heating unit's external heating regulating valve adopts flow regulation mode.

[0034] In the above embodiments, the energy storage of the heating network is calculated using the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate. The AGC load adjustment deviation is obtained based on the actual load parameters of the unit and the AGC load command parameters. The AGC heating adjustment flow rate is obtained based on the energy storage of the heating network and the AGC load adjustment deviation. The control signals of the actual pressure and set pressure of the heating main pipe are analyzed. The heating auxiliary AGC allowance signal is obtained based on the control signal. The updated heating value for controlling the heating unit group is obtained based on the update of the initial heating value using the heating auxiliary AGC allowance signal and the AGC heating adjustment flow rate. This achieves high-speed variable load operation of the heating unit group under the constraint of heating steam extraction, and also realizes the use of the combined heat and power unit group's energy storage to assist AGC, improving the unit's AGC adjustment quality. It has good applicability and broad application prospects, while also ensuring the safe operation of the unit and tapping the unit's maximum potential.

[0035] Optionally, as an embodiment of the present invention, the process of calculating the energy storage of the heating network based on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate, and obtaining the AGC load adjustment deviation based on the actual load parameters of the unit and the AGC load command parameters includes:

[0036] The energy storage capacity of the heating network is obtained by performing a linear function calculation on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate using the first equation:

[0037] Q = F(x,y,z),

[0038] Where Q is the energy stored in the heating network, F() is a piecewise linear function, x is the total mass of the steel in the pipeline, y is the heating steam pressure, and z is the heating steam flow rate;

[0039] The difference between the actual load parameters of the unit and the AGC load command parameters is calculated to obtain the AGC load adjustment deviation.

[0040] It should be understood that the total mass of steel used in the heating network pipeline (i.e., the total mass of steel in the pipeline) is x kg, the heating steam pressure is y MPa, and the heating steam flow rate is zt / h.

[0041] Specifically, based on the experimental data of heating steam flow disturbance, a calculation model for energy storage in the heating network is established, and the energy storage capacity of the heating network, Q = F(x,y,z), is calculated in real time.

[0042] Specifically, the piecewise linear function generates a piecewise linear function f(x) from a set of coordinate points (X, Y). This algorithm can generate piecewise linear functions from both constant and variable points. It can achieve a maximum of 24 piecewise linear function segments. The number of point segments is PointCount (2~25), and the number of segments N = PointCount - 1. The X-coordinate points are a constant sequence {X0, X1, X2, ..., XN}. Note: The X-coordinate points must be monotonically increasing; otherwise, parameter error messages will occur. The Y-coordinate points corresponding to the X-coordinates can be a constant sequence {Y0, Y1, Y2, ..., YN}, or variables {YC0, YC1, ..., YCN}, or a mixture of both. If a point is connected to an analog input YC, that point can dynamically change, thus realizing the function of a dynamic function generator. During algorithm operation, the number n of X-coordinate points satisfying the monotonically increasing condition is first determined, and the actual number of function segments is obtained based on n. Between coordinates X0 and XN, if the variable coordinate point connects to the input, the input value YCi is taken; otherwise, the constant Yi is used, thus determining the linear function for each segment.

[0043] Output calculation: Without tracking, the corresponding piecewise linear function segment is determined based on the value of the input X, and the corresponding output Y is calculated linearly. If the input value is less than X0, the output is Y0 (or YC0); if the input value is greater than XN, the output is YN (or YCN).

[0044] In the tracking scenario, the tracking input is processed by inverse operation of the piecewise linear function to obtain the corresponding tracking output. If the tracking input is less than Ymin, the tracking output is the X value corresponding to Ymin; if the tracking input is greater than Ymax, the tracking output is the X value corresponding to Ymax.

[0045] It should be understood that each unit calculates the AGC load adjustment deviation in real time based on parameters such as AGC load instructions and actual load.

[0046] In the above embodiments, the energy storage of the heating network is calculated based on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate. The AGC load adjustment deviation is obtained based on the actual load parameters of the unit and the AGC load command parameters. This enables high-speed variable load operation of the heating unit group under the constraint of heating steam extraction, and also enables the use of the cogeneration unit group with energy storage in the heating network to assist AGC, thereby improving the AGC adjustment quality of the unit.

[0047] Optionally, as an embodiment of the present invention, the process of obtaining the AGC heating regulation flow rate based on the energy stored in the heating network and the AGC load regulation deviation includes:

[0048] The maximum change in heat supply is obtained by performing a linear function calculation on the energy storage of the heating network using the second equation, which is:

[0049] P1 = F(Q),

[0050] Where P1 is the maximum change in heat supply, F() is a piecewise linear function, and Q is the energy stored in the heating network.

[0051] The demand heating regulation flow rate is obtained by performing a linear function calculation on the AGC load regulation deviation using the third equation, which is:

[0052] P2 = F(a),

[0053] Where P2 is the demand heating regulation flow rate, F() is the piecewise linear function, and a is the AGC load regulation deviation.

[0054] The minimum value between the maximum change in heating supply and the minimum value of the required heating regulation flow rate is selected, and the selected minimum value is used as the AGC heating regulation flow rate.

[0055] It should be understood that the energy storage Q of the heating network is sent to the DCS system of each unit, and the maximum allowable change in heating supply is calculated based on the unit's operating conditions. Within the boundary of the maximum allowable change in heating supply, the auxiliary AGC heating regulation flow rate is calculated based on the AGC load regulation deviation.

[0056] It should be understood that the second formula is to calculate the maximum allowable change in heating supply over a time scale based on the heat storage capacity of the heating network; the third formula is to calculate the demand heating regulation flow over a time scale based on the AGC load deviation.

[0057] In the above embodiments, the AGC heating regulation flow rate is obtained based on the energy storage of the heating network and the AGC load regulation deviation, realizing high-speed variable load operation of the heating unit group under the constraint of heating steam extraction, and also realizing the use of the cogeneration unit group with energy storage in the heating network to assist AGC, thereby improving the AGC regulation quality of the unit, and has good applicability and broad application prospects.

[0058] Optionally, as an embodiment of the present invention, the process of analyzing the control signal of the actual pressure of the heating main pipe and the set pressure of the heating main pipe, and obtaining the heating auxiliary AGC allow signal based on the control signal, includes:

[0059] Calculate the difference between the set pressure of the heating main pipe and the actual pressure of the heating main pipe to obtain the heating main pipe pressure difference;

[0060] If the pressure difference of the heating main pipe is less than or equal to a first preset value, or greater than or equal to a second preset value, a heating main pipe control signal is generated and marked as a first identifier; otherwise, a heating main pipe control signal is generated and marked as a second identifier, wherein the first preset value is less than the second preset value.

[0061] The rate of change of the actual pressure in the heating main pipe is calculated to obtain the rate of change of the analog quantity.

[0062] Determine whether the rate of change of the analog quantity is less than or equal to the first preset value, or greater than or equal to the second preset value. If yes, generate an analog quantity change control signal and mark the analog quantity change control signal as the first identifier; otherwise, generate an analog quantity change control signal and mark the analog quantity change control signal as the second identifier.

[0063] If either the heating main pipe control signal or the analog quantity change control signal is marked with the first identifier, a heating auxiliary AGC enable signal is generated and marked with the first identifier; otherwise, a heating auxiliary AGC enable signal is generated and marked with the second identifier.

[0064] Preferably, the first identifier can be 1, and the second identifier can be 0.

[0065] It should be understood that the heating main pipe control signal can be a signal that controls the heating main pipe according to the pressure difference of the heating main pipe and outputs a switch quantity of 1 or 0; the analog quantity change control signal can be a signal that controls the heating main pipe according to the rate of change of the analog quantity and outputs a switch quantity of 1 or 0; the heating auxiliary AGC enable signal can be a signal that controls whether the AGC is started. When the output switch quantity is 1, the AGC is started to realize heating assistance; when the output switch quantity is 0, the AGC is not started.

[0066] Specifically, if the pressure difference of the heating main pipe is 14, the rate of change of the analog quantity is 8, the first preset value is 5, the second preset value is 10, the first identifier can be 1, and the second identifier is 0;

[0067] Because the pressure difference 14 of the heating main pipe is greater than the second preset value 10, the heating main pipe control signal is marked as the first identifier 1. Because the analog quantity change rate 8 is greater than the first preset value 5 and less than the second preset value 10, the analog quantity change control signal is marked as the second identifier 0. If the heating main pipe control signal 1 and the analog quantity change control signal 0 are marked with the first identifier 1, the heating auxiliary AGC allow signal is marked as the first identifier 1.

[0068] It should be understood that either the heating main pipe control signal or the analog quantity change control signal being marked with the first identifier falls into three categories: the heating main pipe control signal being marked with the first identifier, the analog quantity change control signal being marked with the first identifier, and both the heating main pipe control signal and the analog quantity change control signal being marked with the first identifier.

[0069] It should be understood that a heating main pipe pressure protection model should be established based on the pressure value and its rate of change of the heating main pipe to prevent the heating network from being affected by excessive heating adjustment by the auxiliary AGC.

[0070] Specifically, the rate of change calculation is used to calculate the rate of change of an analog input. The calculation method is as follows: divide the change value of two inputs by the calculation period to obtain the rate of change of the analog input. When the input value increases, the output is positive; otherwise, it is negative. When the smoothing time constant (SMTH) is 0, the output value equals the actual rate of change of the output. The smoothing time constant should be greater than or equal to 0. If the smoothing time constant is less than 0, the output quality is Bad; otherwise, the output quality is determined by the input quality.

[0071] In the above embodiments, the control signals of the actual pressure of the heating main pipe and the set pressure of the heating main pipe are analyzed, and the heating auxiliary AGC allow signal is obtained based on the control signals. This prevents the heating network from being affected by excessive adjustment of the heating supply by the auxiliary AGC, ensuring the safe operation of the unit and tapping the maximum potential of the unit.

[0072] Optionally, as an embodiment of the present invention, the process of updating the initial value of the heating capacity based on the heating auxiliary AGC allow signal and the AGC heating regulation flow rate to obtain an updated value of the heating capacity for controlling the heating unit group includes:

[0073] S41: Determine whether the heating auxiliary AGC allow signal is marked with the first identifier. If yes, execute S42. If no, use the preset heat value as the heat update value for controlling the heating unit group.

[0074] S42: Sum the AGC heating regulation flow rate with the initial heating value, and use the summation result as the updated heating value.

[0075] Preferably, the preset heat value is a constant of 0.

[0076] It should be understood that, under the premise that the auxiliary AGC (i.e., the auxiliary AGC allow signal) allows, the heating regulating valve of each heating unit shall be based on the original heating setpoint (i.e., the initial heating value) and the auxiliary AGC heating regulation flow rate (i.e., the AGC heating regulation flow rate) shall be added to it as the new heating setpoint (i.e., the updated heating value).

[0077] In the above embodiments, the initial value of the heating supply is updated based on the heating auxiliary AGC allow signal and the AGC heating regulation flow rate to obtain the updated value of the heating supply for controlling the heating unit group. This realizes high-speed variable load operation of the heating unit group under the constraint of heating steam extraction, and also realizes the auxiliary AGC of the cogeneration unit group using the heat network energy storage, which improves the AGC regulation quality of the unit and has good applicability and broad application prospects. At the same time, it also ensures the safe operation of the unit and taps the maximum potential of the unit.

[0078] Optionally, as another embodiment of the present invention, the present invention designs a multi-scale coordinated control scheme for heating unit groups by performing spatial and temporal scale analysis and calculation on the energy storage of heating pipeline networks, thereby realizing high-speed variable load operation of heating unit groups under the constraint of heating steam extraction, and improving the AGC regulation quality of the units.

[0079] Alternatively, as another embodiment of the present invention, when the AGC of the present invention increases the electrical load, as the actual heat supply decreases, the excess steam will enter the steam turbine to do work and increase the electrical load, and the heat reheat assisted AGC has a faster response speed.

[0080] Alternatively, as another embodiment of the present invention, when the AGC of the present invention reduces the electrical load, the heating auxiliary AGC does not need to operate; it can be accomplished simply by closing the turbine regulating valve.

[0081] Alternatively, as another embodiment of the present invention, the beneficial effects of the present invention are as follows:

[0082] For heating units with large-scale heating networks, this invention patent enables the use of combined heat and power (CHP) units with network energy storage to assist in AGC (Automatic Guided Vehicle) regulation, thereby improving AGC performance. In existing power grids where renewable energy sources account for a large proportion, this invention addresses issues such as poor load tracking accuracy, large fluctuations in steam temperature and pressure, and thermoelectric coupling in existing coal-fired units. This results in AGC regulation rates and accuracy exceeding the requirements of the "two detailed rules," avoiding electricity consumption assessments based on unit regulation performance and allowing for electricity consumption bonuses. Particularly beneficial is the control of key parameters such as load, steam pressure and temperature, and environmental emission indicators, reducing parameter fluctuations and improving unit flexibility and overall efficiency.

[0083] Figure 2 This is a module block diagram of a heating unit group control device provided in an embodiment of the present invention.

[0084] Alternatively, as another embodiment of the present invention, such as Figure 2 As shown, a heating unit control device includes:

[0085] The data import module is used to import the total mass of pipeline steel, AGC load command parameters, set pressure of the heating main pipe, initial value of heating capacity, heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of the heating main pipe. The heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of the heating main pipe are obtained from the heating unit group.

[0086] The calculation module is used to calculate the energy storage of the heating network based on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate; to obtain the AGC load adjustment deviation based on the actual load parameters of the unit and the AGC load command parameters; and to obtain the AGC heating adjustment flow rate based on the energy storage of the heating network and the AGC load adjustment deviation.

[0087] The analysis module is used to analyze the control signal of the actual pressure of the heating main pipe and the set pressure of the heating main pipe, and obtain the heating auxiliary AGC allow signal based on the control signal;

[0088] The update value acquisition module is used to update the initial value of the heating capacity based on the heating auxiliary AGC allow signal and the AGC heating regulation flow rate, so as to obtain the updated value of the heating capacity for controlling the heating unit group.

[0089] Optionally, as an embodiment of the present invention, the process of calculating the energy storage of the heating network based on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate in the calculation module, and obtaining the AGC load adjustment deviation based on the actual load parameters of the unit and the AGC load command parameters, includes:

[0090] The energy storage capacity of the heating network is obtained by performing a linear function calculation on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate using the first equation:

[0091] Q = F(x,y,z),

[0092] Where Q is the energy stored in the heating network, F() is a piecewise linear function, x is the total mass of the steel in the pipeline, y is the heating steam pressure, and z is the heating steam flow rate;

[0093] The difference between the actual load parameters of the unit and the AGC load command parameters is calculated to obtain the AGC load adjustment deviation.

[0094] Optionally, as an embodiment of the present invention, the process of obtaining the AGC heating regulation flow rate based on the energy stored in the heating network and the AGC load regulation deviation in the calculation module includes:

[0095] The maximum change in heat supply is obtained by performing a linear function calculation on the energy storage of the heating network using the second equation, which is:

[0096] P1 = F(Q),

[0097] Where P1 is the maximum change in heat supply, F() is a piecewise linear function, and Q is the energy stored in the heating network.

[0098] The demand heating regulation flow rate is obtained by performing a linear function calculation on the AGC load regulation deviation using the third equation, which is:

[0099] P2 = F(a),

[0100] Where P2 is the demand heating regulation flow rate, F() is the piecewise linear function, and a is the AGC load regulation deviation.

[0101] The minimum value between the maximum change in heating supply and the minimum value of the required heating regulation flow rate is selected, and the selected minimum value is used as the AGC heating regulation flow rate.

[0102] Optionally, another embodiment of the present invention provides a heating unit group control system, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the heating unit group control method as described above. This system can be a computer or similar system.

[0103] Optionally, another embodiment of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the heating unit control method described above.

[0104] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0105] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the above-described apparatus and unit can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0106] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0107] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of the present invention, depending on actual needs.

[0108] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0109] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0110] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for controlling a heating unit group, characterized in that, Includes the following steps: Import the total mass of pipeline steel, AGC load command parameters, set pressure of heating main pipe, initial value of heating capacity, heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of heating main pipe. The heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of heating main pipe are obtained from the heating unit group. The energy storage of the heating network is calculated based on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate. The AGC load adjustment deviation is obtained based on the actual load parameters of the unit and the AGC load command parameters. The AGC heating adjustment flow rate is obtained based on the energy storage of the heating network and the AGC load adjustment deviation. Analyze the control signal between the actual pressure of the heating main pipe and the set pressure of the heating main pipe, and obtain the heating auxiliary AGC allow signal based on the control signal; The initial value of the heating capacity is updated based on the heating auxiliary AGC allow signal and the AGC heating regulation flow rate to obtain the updated value of the heating capacity for controlling the heating unit group. The process of analyzing the control signal of the actual pressure of the heating main pipe and the set pressure of the heating main pipe, and obtaining the heating auxiliary AGC allow signal based on the control signal, includes: Calculate the difference between the set pressure of the heating main pipe and the actual pressure of the heating main pipe to obtain the heating main pipe pressure difference; If the pressure difference of the heating main pipe is less than or equal to a first preset value, or greater than or equal to a second preset value, a heating main pipe control signal is generated and marked as a first identifier; otherwise, a heating main pipe control signal is generated and marked as a second identifier, wherein the first preset value is less than the second preset value. The rate of change of the actual pressure in the heating main pipe is calculated to obtain the rate of change of the analog quantity. Determine whether the rate of change of the analog quantity is less than or equal to the first preset value, or greater than or equal to the second preset value. If yes, generate an analog quantity change control signal and mark the analog quantity change control signal as the first identifier; otherwise, generate an analog quantity change control signal and mark the analog quantity change control signal as the second identifier. If either the heating main pipe control signal or the analog quantity change control signal is marked with the first identifier, a heating auxiliary AGC enable signal is generated and marked with the first identifier; otherwise, a heating auxiliary AGC enable signal is generated and marked with the second identifier.

2. The heating unit group control method according to claim 1, characterized in that, The process of calculating the energy storage of the heating network based on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate, and obtaining the AGC load adjustment deviation based on the actual load parameters of the unit and the AGC load command parameters includes: The energy storage capacity of the heating network is obtained by performing a linear function calculation on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate using the first equation: ， in, To store energy for the heating network, It is a piecewise linear function. This refers to the total mass of the steel used in the pipeline. For heating steam pressure, For heating steam flow rate; The difference between the actual load parameters of the unit and the AGC load command parameters is calculated to obtain the AGC load adjustment deviation.

3. The heating unit group control method according to claim 1, characterized in that, The process of obtaining the AGC heating regulation flow rate based on the energy storage of the heating network and the AGC load regulation deviation includes: The maximum change in heat supply is obtained by performing a linear function calculation on the energy storage of the heating network using the second equation, which is: ， in, This represents the maximum change in heat supply. It is a piecewise linear function. For storing energy in the heating network; The demand heating regulation flow rate is obtained by performing a linear function calculation on the AGC load regulation deviation using the third equation, which is: ， in, Adjusting the flow rate to meet heating demand. It is a piecewise linear function. This refers to the AGC load adjustment deviation. The minimum value between the maximum change in heating supply and the minimum value of the required heating regulation flow rate is selected, and the selected minimum value is used as the AGC heating regulation flow rate.

4. The heating unit group control method according to claim 1, characterized in that, The process of updating the initial value of the heating capacity based on the heating auxiliary AGC allow signal and the AGC heating regulation flow rate to obtain the updated value of the heating capacity for controlling the heating unit group includes: S41: Determine whether the heating auxiliary AGC allow signal is marked with the first identifier. If yes, execute S42. If no, use the preset heat value as the heat update value for controlling the heating unit group. S42: Sum the AGC heating regulation flow rate with the initial heating value, and use the summation result as the updated heating value.

5. A control device for a heating unit group, characterized in that, include: The data import module is used to import the total mass of pipeline steel, AGC load command parameters, set pressure of the heating main pipe, initial value of heating capacity, heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of the heating main pipe. The heating steam pressure, heating steam flow rate, actual load parameters of the unit, and actual pressure of the heating main pipe are obtained from the heating unit group. The calculation module is used to calculate the energy storage of the heating network based on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate; to obtain the AGC load adjustment deviation based on the actual load parameters of the unit and the AGC load command parameters; and to obtain the AGC heating adjustment flow rate based on the energy storage of the heating network and the AGC load adjustment deviation. The analysis module is used to analyze the control signal of the actual pressure of the heating main pipe and the set pressure of the heating main pipe, and obtain the heating auxiliary AGC allow signal based on the control signal; The update value acquisition module is used to update the initial value of the heating capacity according to the heating auxiliary AGC allow signal and the AGC heating regulation flow rate, so as to obtain the updated value of the heating capacity for controlling the heating unit group. The process of analyzing the control signal of the actual pressure of the heating main pipe and the set pressure of the heating main pipe, and obtaining the heating auxiliary AGC allow signal based on the control signal, includes: Calculate the difference between the set pressure of the heating main pipe and the actual pressure of the heating main pipe to obtain the heating main pipe pressure difference; If the pressure difference of the heating main pipe is less than or equal to a first preset value, or greater than or equal to a second preset value, a heating main pipe control signal is generated and marked as a first identifier; otherwise, a heating main pipe control signal is generated and marked as a second identifier, wherein the first preset value is less than the second preset value. The rate of change of the actual pressure in the heating main pipe is calculated to obtain the rate of change of the analog quantity. Determine whether the rate of change of the analog quantity is less than or equal to the first preset value, or greater than or equal to the second preset value. If yes, generate an analog quantity change control signal and mark the analog quantity change control signal as the first identifier; otherwise, generate an analog quantity change control signal and mark the analog quantity change control signal as the second identifier. If either the heating main pipe control signal or the analog quantity change control signal is marked with the first identifier, a heating auxiliary AGC enable signal is generated and marked with the first identifier; otherwise, a heating auxiliary AGC enable signal is generated and marked with the second identifier.

6. The heating unit control device according to claim 5, characterized in that, The calculation module calculates the energy storage of the heating network based on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate, and obtains the AGC load adjustment deviation based on the actual load parameters of the unit and the AGC load command parameters. The energy storage capacity of the heating network is obtained by performing a linear function calculation on the total mass of the pipeline steel, the heating steam pressure, and the heating steam flow rate using the first equation: ， in, To store energy for the heating network, It is a piecewise linear function. This refers to the total mass of the steel used in the pipeline. For heating steam pressure, For heating steam flow rate; The difference between the actual load parameters of the unit and the AGC load command parameters is calculated to obtain the AGC load adjustment deviation.

7. The heating unit group control device according to claim 6, characterized in that, The calculation module includes the following process for obtaining the AGC heating regulation flow rate based on the energy storage of the heating network and the AGC load regulation deviation: The maximum change in heat supply is obtained by performing a linear function calculation on the energy storage of the heating network using the second equation, which is: ， in, This represents the maximum change in heat supply. It is a piecewise linear function. For storing energy in the heating network; The demand heating regulation flow rate is obtained by performing a linear function calculation on the AGC load regulation deviation using the third equation, which is: ， in, Adjusting the flow rate to meet heating demand. It is a piecewise linear function. This refers to the AGC load adjustment deviation. The minimum value between the maximum change in heating supply and the minimum value of the required heating regulation flow rate is selected, and the selected minimum value is used as the AGC heating regulation flow rate.

8. A heating unit group control system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the heating unit control method as described in any one of claims 1 to 4.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the heating unit control method as described in any one of claims 1 to 4.

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