DCS-based control method and system for hydraulic control butterfly valve of heat supply system

Abstract

The invention relates to the technical field of hydraulic control butterfly valves, in particular to a DCS-based control method and system for a heat supply system hydraulic control butterfly valve. Comprising the following steps: establishing a plurality of equipment points according to equipment parameters of the heat supply system, and setting a control sub-model of each equipment point; setting a primary control strategy of each equipment point according to all the control sub-models, and judging whether a correction instruction is generated or not according to the working condition parameters; feedback parameters of all the equipment points are obtained, operation risk values of all the equipment points are generated, and whether an early warning instruction is generated or not is judged according to all the operation risk values; control sub-modules of all hydraulic control butterfly valves in the heat supply system are additionally arranged based on DCS control, independent control over all the hydraulic control butterfly valves is achieved, a feedback sub-module is additionally arranged, an angular displacement sensor is additionally arranged at an execution mechanism, an execution mechanism displacement signal is synchronously transmitted with an original sensor, accurate monitoring over all the hydraulic control butterfly valves is achieved, and the control accuracy of the hydraulic control butterfly valves is improved. Potential faults are early warned in time, and safe operation of the system is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulically controlled butterfly valves, and in particular to a control method and system for a hydraulically controlled butterfly valve of a heating system based on a DCS. Background Art

[0002] The thermal system of the gas-steam combined cycle unit mainly consists of two parts: the gas circulation system and the waste heat boiler-turbine steam-water system. The exhaust gas of the gas turbine is discharged into the waste heat boiler, and the steam generated by the waste heat boiler drives the steam turbine. The exhaust steam of the low-pressure cylinder of the steam turbine enters the exhaust device, and the exhaust heat is taken away by the air-cooled condenser. In heating conditions, the steam turbine can operate with condensation or back pressure, and the steam is extracted from the medium and low pressure connecting pipes to the heating network heater to heat the heating network circulating water.

[0003] The water temperature and water volume of the heating network system are regulated by both quantity and quality. The change of external heat load is achieved by adjusting the opening of the butterfly valve on the connecting pipe through the hydraulic pressure of the steam turbine. For the change of heat load in a short period of time, the electric butterfly valve with inching adjustment on the steam inlet pipe of the heater is used to change the steam volume and thus change the water supply temperature. However, the hydraulically controlled butterfly valve at this stage is mainly controlled locally, and the electronic components in the control box are affected by the ambient temperature and vibration, which can easily cause the valve feedback swing or the valve actuator to lose control, thus affecting the safe operation of the system. Summary of the invention

[0004] The purpose of this application is: to solve the above-mentioned technical problems, this application provides a control method and system for a hydraulically controlled butterfly valve in a heating system based on a DCS, aiming to achieve redundant control of the hydraulically controlled butterfly valve, reduce the risk of failure, and ensure the safe operation of the heating system.

[0005] In some embodiments of the present application, a control submodule is added to each hydraulically controlled butterfly valve in the heating system based on DCS control to achieve individual control of each hydraulically controlled butterfly valve. By adding a feedback submodule, an angular displacement sensor is added to the actuator to synchronously transmit the actuator displacement signal with the original sensor, thereby achieving accurate monitoring of each hydraulically controlled butterfly valve, timely warning of potential faults, and ensuring safe operation of the system.

[0006] In some embodiments of the present application, the operating status of the heating system is judged based on the periodic collection of operating parameters, and the working parameters of all hydraulically controlled butterfly valves are corrected through overall adjustment, thereby achieving multi-stage adjustment of the hydraulically controlled butterfly valves, achieving precise control of the opening of the hydraulically controlled butterfly valves, and reducing the risk of failure.

[0007] In some embodiments of the present application, a control method for a hydraulically controlled butterfly valve of a heating system based on a DCS is provided, comprising:

[0008] Establish multiple equipment points according to the equipment parameters of the heating system, and set the control sub-model of each equipment point;

[0009] Set the primary control strategy for each equipment point according to all control sub-models, and determine whether to generate correction instructions based on operating condition parameters;

[0010] Obtain feedback parameters from each equipment point, generate operation risk values ​​for each equipment point, and determine whether to generate an early warning instruction based on all operation risk values;

[0011] When multiple equipment points are established, it includes:

[0012] Establish a device point sequence A, A = (a1, a2...ai...an), where ai is the i-th device point and n is the number of device points.

[0013] In some embodiments of the present application, the primary control strategy for each device point is set, including:

[0014] Sequentially set the i-th device point as the target device point, and generate a primary control strategy for the target device point;

[0015] The primary control strategy for the target equipment point includes:

[0016] Set characteristic indicators of target equipment points;

[0017] Obtain the valve opening of the target device point at the last feedback time node;

[0018] Obtain the real-time parameters of each characteristic indicator at the current feedback time node;

[0019] Preset operating condition fluctuation evaluation value threshold C1;

[0020] If c<C1, no adjustment instruction is generated;

[0021] If c>C1, the target device point generates an adjustment instruction at the current feedback time node;

[0022] According to the adjustment instruction, the valve opening adjustment amount of the target device point at the current feedback time node is set;

[0023] Generate the first-level control strategy for each equipment point in turn.

[0024] In some embodiments of the present application, generating the operating condition fluctuation value c at the current feedback time node includes:

[0025]

[0026] Among them, θ is the number of characteristic indicators of the target device point; μi is the influencing factor of the i-th characteristic indicator; pi is the reference value of the i-th characteristic indicator at the current feedback time node; p'i is the reference value of the i-th characteristic indicator at the previous feedback time node.

[0027] In some embodiments of the present application, determining whether to generate a correction instruction according to an operating condition parameter includes:

[0028] Establish multiple monitoring points according to the equipment parameters of the heating system;

[0029] Establish a monitoring cycle and generate multiple monitoring time nodes based on the monitoring cycle;

[0030] Obtain the operating parameters of each monitoring point at the current monitoring time node, and generate the operating deviation value of each monitoring point based on all operating parameters;

[0031] Establish a working condition deviation value sequence B, B = (b1, b2...bi...bm), where bi is the working condition deviation value of the i-th monitoring point at the current monitoring time node; m is the number of monitoring points;

[0032] Generate a corrected evaluation value d at the current monitoring time node according to the operating condition deviation value sequence B;

[0033] Preset modified evaluation value threshold D1;

[0034] If d>D1, a correction instruction is generated at the current monitoring time node.

[0035] In some embodiments of the present application, generating a modified evaluation value d of the current monitoring time node includes:

[0036]

[0037] Among them, e1 is the preset first weight coefficient; e2 is the preset second weight coefficient; Q1 is the preset first fixed coefficient; Q2 is the preset second fixed coefficient; d' is the operating condition deviation value threshold; Y(i) is the selection coefficient; if (di-d') <0, Y(i) = 0; if (di-d') > 0, Y(i) = 1; Δd is the average value of all data in the operating condition deviation value series B.

[0038] In some embodiments of the present application, obtaining feedback parameters of each device point includes:

[0039] Determine whether there is a valve opening adjustment amount at the target device point at the current feedback time node;

[0040] If it exists;

[0041] Acquire a first displacement signal curve and a second displacement signal curve of a target device point;

[0042] Generate a feedback data packet of a current feedback time node of a target device point according to the first displacement signal curve and the second displacement signal curve;

[0043] If it does not exist;

[0044] Obtain valve opening signal of target equipment point;

[0045] Generate a feedback data packet of the target device point at the current feedback time node according to the valve opening signal;

[0046] Generate feedback data packets for each device point at the current feedback time node in sequence.

[0047] In some embodiments of the present application, judging whether to generate a warning instruction according to all operation risk values ​​includes:

[0048] Obtain the feedback data packet of the target device at the current feedback time node;

[0049] Generate the operation risk value f of the target equipment point at the current feedback time node;

[0050] Generate the operation risk value of each equipment point at the current feedback time node in sequence;

[0051] Establish an operation risk value sequence F, F = (f1, f2...fi...fn), where fi is the operation risk value of the i-th equipment point at the current feedback time node;

[0052] Preset a first operation risk value threshold F1 and a second operation risk value threshold F2;

[0053] If fi<F1, the i-th equipment point does not generate a warning instruction at the current feedback time node;

[0054] If F1<fi<F2, the i-th equipment point generates a first-level warning instruction at the current feedback time node;

[0055] If fi>F2, the i-th equipment point generates a secondary warning instruction at the current feedback time node.

[0056] In some embodiments of the present application, generating an operation risk value f of a target device point at a current feedback time node includes:

[0057]

[0058] Among them, e3 is the preset third weight coefficient; e4 is the preset fourth weight coefficient; Q3 is the preset third fixed coefficient; Q4 is the preset fourth fixed coefficient; r is the number of monitoring indicators; βi is the influencing factor of the i-th monitoring indicator; ji is the reference value of the i-th monitoring indicator of the target equipment point at the current feedback time node; j'i is the standard reference value of the i-th monitoring indicator; U is the historical risk value of the target equipment point.

[0059] Some embodiments of the present application provide a control system for a hydraulically controlled butterfly valve of a heating system based on a DCS, including:

[0060] The central control unit is used to establish multiple equipment points according to the equipment parameters of the heating system and set the control sub-model of each equipment point;

[0061] A control unit, comprising a plurality of control submodules, wherein the control submodules are arranged at the equipment points, and the control unit is used to set the primary control strategy of each equipment point;

[0062] A monitoring unit, including a plurality of monitoring submodules, wherein the monitoring unit is used to collect operating condition parameters;

[0063] A feedback unit, comprising a plurality of feedback submodules, wherein the feedback submodules are arranged at each device point, and the feedback unit is used to collect feedback parameters of each device point;

[0064] In some embodiments of the present application, the central control unit includes:

[0065] The first processing module is used to establish a device point number sequence A, A = (a1, a2 ... ai ... an), where ai is the i-th device point; n is the number of device points;

[0066] The first processing module is also used to determine whether to generate a correction instruction according to the operating condition parameters;

[0067] The second processing module is used to obtain feedback parameters of each equipment point and generate an operation risk value of each equipment point;

[0068] The third processing module is used to determine whether to generate a warning instruction according to all operation risk values.

[0069] Compared with the prior art, the control method and system of a DCS-based hydraulic butterfly valve in a heating system according to the embodiment of the present application have the following beneficial effects:

[0070] Based on DCS control, a control submodule is added to each hydraulically controlled butterfly valve in the heating system to achieve independent control of each hydraulically controlled butterfly valve. By adding a feedback submodule, an angular displacement sensor is added to the actuator to transmit the actuator displacement signal synchronously with the original sensor, thereby achieving accurate monitoring of each hydraulically controlled butterfly valve, timely warning of potential faults, and ensuring safe operation of the system.

[0071] Based on the periodic collection of operating parameters, the operating status of the heating system is judged, and the working parameters of all hydraulically controlled butterfly valves are corrected through overall adjustment, so as to achieve multi-level adjustment of the hydraulically controlled butterfly valves, realize precise control of the opening of the hydraulically controlled butterfly valves, and reduce the risk of failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 It is a flow chart of a control method of a hydraulically controlled butterfly valve in a heating system based on DCS in a preferred embodiment of the present application. DETAILED DESCRIPTION

[0073] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0074] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0075] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0076] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0077] like Figure 1 As shown, a control method of a hydraulically controlled butterfly valve of a heating system based on a DCS in a preferred embodiment of the present application includes:

[0078] S101: Establish multiple equipment points according to equipment parameters of the heating system, and set a control sub-model for each equipment point;

[0079] S102: setting the primary control strategy for each equipment point according to all control sub-models, and determining whether to generate a correction instruction according to the operating condition parameters;

[0080] S103: Obtain feedback parameters of each equipment point, generate an operation risk value of each equipment point, and determine whether to generate an early warning instruction based on all the operation risk values;

[0081] When multiple equipment points are established, it includes:

[0082] Establish a device point sequence A, A = (a1, a2...ai...an), where ai is the i-th device point and n is the number of device points.

[0083] Specifically, a device point number series is established according to the number of hydraulically controlled butterfly valves that need to be controlled in the heating system, and a corresponding control submodule and feedback submodule are set at each device point.

[0084] Specifically, a control sub-model corresponding to the current equipment point is built into the control sub-module, and the control sub-model is a heat load-valve opening mapping table and a control sub-program for each opening generated according to historical parameters.

[0085] Specifically, by acquiring real-time heat load changes, each control submodule determines the valve opening of the corresponding equipment point and generates a corresponding control signal.

[0086] Specifically, the primary control strategy for each device point is set, including:

[0087] Sequentially set the i-th device point as the target device point, and generate a primary control strategy for the target device point;

[0088] The primary control strategy for the target equipment point includes:

[0089] Set characteristic indicators of target equipment points;

[0090] Obtain the valve opening of the target device point at the last feedback time node;

[0091] Obtain the real-time parameters of each characteristic indicator at the current feedback time node;

[0092] Preset operating condition fluctuation evaluation value threshold C1;

[0093] If c<C1, no adjustment instruction is generated;

[0094] If c>C1, the target device point generates an adjustment instruction at the current feedback time node;

[0095] According to the adjustment instruction, the valve opening adjustment amount of the target device point at the current feedback time node is set;

[0096] Generate the first-level control strategy for each equipment point in turn.

[0097] Specifically, the operating condition fluctuation value c of the current feedback time node is generated, including:

[0098]

[0099] Among them, θ is the number of characteristic indicators of the target device point; μi is the influencing factor of the i-th characteristic indicator; pi is the reference value of the i-th characteristic indicator at the current feedback time node; p'i is the reference value of the i-th characteristic indicator at the previous feedback time node.

[0100] Specifically, the characteristic indicators include, but are not limited to, multiple parameters such as heat load, water temperature, and water volume. The larger the operating condition fluctuation evaluation value, the greater the possibility that the valve opening of the target equipment point needs to be adjusted.

[0101] Specifically, when the operating condition evaluation value is greater than the threshold, the corresponding expected opening must be determined according to the control sub-model, and the corresponding valve opening adjustment amount must be generated to achieve precise control of the hydraulically controlled butterfly valve and ensure stable operation of the system.

[0102] It can be understood that, in the above embodiment, a control submodule of each hydraulically controlled butterfly valve in the heating system is added based on DCS control to achieve individual control of each hydraulically controlled butterfly valve and ensure stable operation of the system.

[0103] In a preferred embodiment of the present application, judging whether to generate a correction instruction according to the operating condition parameters includes:

[0104] Establish multiple monitoring points according to the equipment parameters of the heating system;

[0105] Establish a monitoring cycle and generate multiple monitoring time nodes based on the monitoring cycle;

[0106] Obtain the operating parameters of each monitoring point at the current monitoring time node, and generate the operating deviation value of each monitoring point based on all operating parameters;

[0107] Establish a working condition deviation value sequence B, B = (b1, b2...bi...bm), where bi is the working condition deviation value of the i-th monitoring point at the current monitoring time node; m is the number of monitoring points;

[0108] Generate a corrected evaluation value d at the current monitoring time node according to the operating condition deviation value series B;

[0109] Preset modified evaluation value threshold D1;

[0110] If d>D1, a correction instruction is generated at the current monitoring time node.

[0111] Specifically, generating the corrected evaluation value d of the current monitoring time node includes:

[0112]

[0113] Among them, e1 is the preset first weight coefficient; e2 is the preset second weight coefficient; Q1 is the preset first fixed coefficient; Q2 is the preset second fixed coefficient; d' is the operating condition deviation value threshold; Y(i) is the selection coefficient; if (di-d') <0, Y(i) = 0; if (di-d') > 0, Y(i) = 1; Δd is the average value of all data in the operating condition deviation value series B.

[0114] Specifically, all parameters in the model are normalized by presetting the first fixed coefficient and the second fixed coefficient, so that each parameter is within the same value range.

[0115] Specifically, by collecting multiple groups of operating parameters at each monitoring point, the corresponding operating deviation value is generated according to the average value and volatility of all data. The more unstable the real-time operating parameters of the monitoring point are, the greater the difference between the expected value and the corresponding operating deviation value is. Its operating parameters include but are not limited to steam temperature, water temperature, extraction pressure, steam volume and other parameters.

[0116] Specifically, the larger the correction evaluation value is, the worse the overall operating status of the heating system is at the current monitoring time node, and each hydraulic control valve needs to be corrected in time.

[0117] Specifically, when a correction instruction is generated, a comprehensive analysis is performed on the operating parameters of each monitoring point to determine the adjustment value corresponding to each equipment point.

[0118] It can be understood that in the above embodiment, the operating status of the heating system is judged based on the periodic collection of operating parameters, and the working parameters of all hydraulically controlled butterfly valves are corrected through overall adjustment, thereby realizing multi-stage adjustment of the hydraulically controlled butterfly valves, realizing precise control of the opening of the hydraulically controlled butterfly valves, and reducing the risk of failure.

[0119] In a preferred embodiment of the present application, obtaining feedback parameters of each device point includes:

[0120] Determine whether there is a valve opening adjustment amount at the target device point at the current feedback time node;

[0121] If it exists;

[0122] Acquire a first displacement signal curve and a second displacement signal curve of a target device point;

[0123] Generate a feedback data packet of a current feedback time node of a target device point according to the first displacement signal curve and the second displacement signal curve;

[0124] If it does not exist;

[0125] Obtain valve opening signal of target equipment point;

[0126] Generate a feedback data packet of the target device point at the current feedback time node according to the valve opening signal;

[0127] Generate feedback data packets for each device point at the current feedback time node in sequence.

[0128] Specifically, a feedback submodule is provided at each equipment point, wherein the feedback submodule refers to adding an angular displacement sensor at the actuator to transmit the actuator displacement signal synchronously with the original sensor.

[0129] When the hydraulically controlled butterfly valve at the equipment point needs to be adjusted, a corresponding first displacement signal curve and a second displacement signal curve are generated, thereby achieving precise control of the hydraulically controlled butterfly valve and obtaining a precise opening of the hydraulically controlled butterfly valve.

[0130] Specifically, whether to generate an early warning instruction is determined based on the total operational risk value, including:

[0131] Obtain the feedback data packet of the target device at the current feedback time node;

[0132] Generate the operation risk value f of the target equipment point at the current feedback time node;

[0133] Generate the operation risk value of each equipment point at the current feedback time node in sequence;

[0134] Establish an operation risk value sequence F, F = (f1, f2...fi...fn), where fi is the operation risk value of the i-th equipment point at the current feedback time node;

[0135] Preset a first operation risk value threshold F1 and a second operation risk value threshold F2;

[0136] If fi<F1, the i-th equipment point does not generate a warning instruction at the current feedback time node;

[0137] If F1<fi<F2, the i-th equipment point generates a first-level warning instruction at the current feedback time node;

[0138] If fi>F2, the i-th equipment point generates a secondary warning instruction at the current feedback time node.

[0139] Specifically, the first-level warning instruction means that the hydraulically controlled butterfly valve at the current equipment point may be operating abnormally, and it needs to be repaired in time during non-working hours to eliminate potential failure risks. The second-level warning instruction means that the hydraulically controlled butterfly valve at the current equipment point may fail at any time, and it needs to be shut down for maintenance immediately.

[0140] Specifically, the operating risk value f of the target device point at the current feedback time node is generated, including:

[0141]

[0142] Among them, e3 is the preset third weight coefficient; e4 is the preset fourth weight coefficient; Q3 is the preset third fixed coefficient; Q4 is the preset fourth fixed coefficient; r is the number of monitoring indicators; βi is the influencing factor of the i-th monitoring indicator; ji is the reference value of the i-th monitoring indicator of the target equipment point at the current feedback time node; j'i is the standard reference value of the i-th monitoring indicator; U is the historical risk value of the target equipment point.

[0143] Specifically, real-time reference values ​​of various monitoring indicators are generated through the first displacement signal curve and the second displacement signal curve. The monitoring indicators include but are not limited to valve control accuracy, response time and other parameters. The larger the operating risk value, the greater the possibility that the hydraulically controlled butterfly valve at the current equipment point has a potential failure risk.

[0144] Specifically, by presetting the third fixed coefficient and the fourth fixed coefficient, all parameters in the model are normalized so that each parameter is within the same value range.

[0145] It can be understood that in the above embodiment, by adding a feedback submodule, an angular displacement sensor is added to the actuator, and the actuator displacement signal is transmitted synchronously with the original sensor, so as to achieve accurate monitoring of each hydraulically controlled butterfly valve, timely warn of potential faults, and ensure the safe operation of the system.

[0146] Based on another preferred embodiment of a control method of a DCS-based hydraulically controlled butterfly valve of a heating system in any of the above preferred embodiments, this preferred embodiment provides a control system of a DCS-based hydraulically controlled butterfly valve of a heating system, including:

[0147] The central control unit is used to establish multiple equipment points according to the equipment parameters of the heating system and set the control sub-model of each equipment point;

[0148] A control unit, including a plurality of control submodules, the control submodules are arranged at the equipment points, and the control unit is used to set the primary control strategy of each equipment point;

[0149] A monitoring unit, including a plurality of monitoring submodules, and the monitoring unit is used to collect operating condition parameters;

[0150] A feedback unit, including a plurality of feedback submodules, wherein the feedback submodules are arranged at each device point, and the feedback unit is used to collect feedback parameters of each device point;

[0151] Specifically, the central control unit includes:

[0152] The first processing module is used to establish a device point number sequence A, A = (a1, a2 ... ai ... an), where ai is the i-th device point; n is the number of device points;

[0153] The first processing module is also used to determine whether to generate a correction instruction according to the operating condition parameters;

[0154] The second processing module is used to obtain feedback parameters of each equipment point and generate an operation risk value of each equipment point;

[0155] The third processing module is used to determine whether to generate a warning instruction according to all operation risk values.

[0156] According to the first concept of the present application, a control submodule is added to each hydraulically controlled butterfly valve in the heating system based on DCS control to realize individual control of each hydraulically controlled butterfly valve. By adding a feedback submodule, an angular displacement sensor is added to the actuator to synchronously transmit the actuator displacement signal with the original sensor, thereby realizing accurate monitoring of each hydraulically controlled butterfly valve, timely warning of potential faults, and ensuring safe operation of the system.

[0157] According to the second conception before this application, the operating status of the heating system is judged based on the periodic collection of operating parameters, and the working parameters of all hydraulically controlled butterfly valves are corrected through overall adjustment, thereby realizing multi-stage adjustment of the hydraulically controlled butterfly valves, realizing precise control of the opening of the hydraulically controlled butterfly valves, and reducing the risk of failure.

[0158] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection of the present application.

Claims

1. A control method for a hydraulically controlled butterfly valve in a heating system based on DCS, characterized in that: include: Establish multiple equipment points according to the equipment parameters of the heating system, and set the control sub-model of each equipment point; Set the primary control strategy for each equipment point according to all control sub-models, and determine whether to generate correction instructions based on operating condition parameters; Obtain feedback parameters from each equipment point, generate operation risk values ​​for each equipment point, and determine whether to generate an early warning instruction based on all operation risk values; When multiple equipment points are established, it includes: Establish a device point sequence A, A = (a1, a2...ai...an), where ai is the i-th device point and n is the number of device points.

2. The control method of the hydraulically controlled butterfly valve of the heating system based on DCS according to claim 1, characterized in that: Set the primary control strategy for each device point, including: Sequentially set the i-th device point as the target device point, and generate a primary control strategy for the target device point; The primary control strategy for the target equipment point includes: Set characteristic indicators of target equipment points; Obtain the valve opening of the target device point at the last feedback time node; Obtain the real-time parameters of each characteristic indicator at the current feedback time node; Preset operating condition fluctuation evaluation value threshold C1; If c<C1, no adjustment instruction is generated; If c>C1, the target device point generates an adjustment instruction at the current feedback time node; According to the adjustment instruction, the valve opening adjustment amount of the target device point at the current feedback time node is set; Generate the first-level control strategy for each equipment point in turn.

3. The control method of the hydraulically controlled butterfly valve of the heating system based on DCS according to claim 2 is characterized in that: Generate the operating condition fluctuation value c of the current feedback time node, including: Among them, θ is the number of characteristic indicators of the target device point; μi is the influencing factor of the i-th characteristic indicator; pi is the reference value of the i-th characteristic indicator at the current feedback time node; p'i is the reference value of the i-th characteristic indicator at the previous feedback time node.

4. The control method of the hydraulically controlled butterfly valve of the heating system based on DCS according to claim 2, characterized in that: Determine whether to generate a correction instruction based on the operating condition parameters, including: Establish multiple monitoring points according to the equipment parameters of the heating system; Establish a monitoring cycle and generate multiple monitoring time nodes based on the monitoring cycle; Obtain the operating parameters of each monitoring point at the current monitoring time node, and generate the operating deviation value of each monitoring point based on all operating parameters; Establish a working condition deviation value sequence B, B = (b1, b2...bi...bm), where bi is the working condition deviation value of the i-th monitoring point at the current monitoring time node; m is the number of monitoring points; Generate a corrected evaluation value d at the current monitoring time node according to the operating condition deviation value series B; Preset modified evaluation value threshold D1; If d>D1, a correction instruction is generated at the current monitoring time node.

5. The control method of the hydraulically controlled butterfly valve of the heating system based on DCS according to claim 4, characterized in that: Generate the corrected evaluation value d of the current monitoring time node, including: Among them, e1 is the preset first weight coefficient; e2 is the preset second weight coefficient; Q1 is the preset first fixed coefficient; Q2 is the preset second fixed coefficient; d' is the operating condition deviation value threshold; Y(i) is the selection coefficient; if (di-d') <0, Y(i) = 0; if (di-d') > 0, Y(i) = 1; Δd is the average value of all data in the operating condition deviation value series B.

6. The control method of the hydraulically controlled butterfly valve of the heating system based on DCS according to claim 4, characterized in that: Get feedback parameters of each device point, including: Determine whether there is a valve opening adjustment amount at the target device point at the current feedback time node; If it exists; Acquire a first displacement signal curve and a second displacement signal curve of a target device point; Generate a feedback data packet of a current feedback time node of a target device point according to the first displacement signal curve and the second displacement signal curve; If it does not exist; Obtain valve opening signal of target equipment point; Generate a feedback data packet of the target device point at the current feedback time node according to the valve opening signal; Generate feedback data packets for each device point at the current feedback time node in sequence.

7. The control method of the hydraulically controlled butterfly valve of the heating system based on DCS according to claim 6, characterized in that: Determine whether to generate an early warning instruction based on all operational risk values, including: Obtain the feedback data packet of the target device at the current feedback time node; Generate the operation risk value f of the target equipment point at the current feedback time node; Generate the operation risk value of each equipment point at the current feedback time node in sequence; Establish an operation risk value sequence F, F = (f1, f2...fi...fn), where fi is the operation risk value of the i-th equipment point at the current feedback time node; Preset a first operation risk value threshold F1 and a second operation risk value threshold F2; If fi<F1, the i-th equipment point does not generate a warning instruction at the current feedback time node; If F1<fi<F2, the i-th equipment point generates a first-level warning instruction at the current feedback time node; If fi>F2, the i-th equipment point generates a secondary warning instruction at the current feedback time node.

8. The control method of the hydraulically controlled butterfly valve of the heating system based on DCS according to claim 7, characterized in that: Generate the operation risk value f of the target equipment point at the current feedback time node, including: Among them, e3 is the preset third weight coefficient; e4 is the preset fourth weight coefficient; Q3 is the preset third fixed coefficient; Q4 is the preset fourth fixed coefficient; r is the number of monitoring indicators; βi is the influencing factor of the i-th monitoring indicator; ji is the reference value of the i-th monitoring indicator of the target equipment point at the current feedback time node; j'i is the standard reference value of the i-th monitoring indicator; U is the historical risk value of the target equipment point.

9. A control system for a hydraulically controlled butterfly valve in a heating system based on DCS, using the control method for a hydraulically controlled butterfly valve in a heating system based on DCS as claimed in any one of claims 1 to 8, characterized in that: include: The central control unit is used to establish multiple equipment points according to the equipment parameters of the heating system and set the control sub-model of each equipment point; A control unit, comprising a plurality of control submodules, wherein the control submodules are arranged at the equipment points, and the control unit is used to set the primary control strategy of each equipment point; A monitoring unit, including a plurality of monitoring submodules, wherein the monitoring unit is used to collect operating condition parameters; The feedback unit includes a plurality of feedback submodules, wherein the feedback submodules are arranged at each equipment point, and the feedback unit is used to collect feedback parameters of each equipment point.

10. The control system of the hydraulically controlled butterfly valve of the heating system based on DCS as claimed in claim 9, characterized in that: The central control unit comprises: The first processing module is used to establish a device point number sequence A, A = (a1, a2 ... ai ... an), where ai is the i-th device point; n is the number of device points; The first processing module is also used to determine whether to generate a correction instruction according to the operating condition parameters; The second processing module is used to obtain feedback parameters of each equipment point and generate an operation risk value of each equipment point; The third processing module is used to determine whether to generate a warning instruction according to all operation risk values.

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