AGC auxiliary frequency modulation control device of heat supply unit

Abstract

The utility model relates to the technical field of automatic control, in particular to a heat supply unit AGC (Automatic Gain Control) auxiliary frequency modulation control device, which comprises a box body, a detection module, an AGC auxiliary module, a PLC (Programmable Logic Controller) and a box door, according to the utility model, the AGC auxiliary module is arranged, so that the load change of the electric power system can be monitored in real time, and the power output of the heat supply unit can be automatically adjusted to compensate the change, thereby being beneficial to maintaining the frequency stability of the electric power system, preventing the system collapse caused by the load fluctuation, and playing the roles of quickly responding and improving the efficiency; frequent operation of workers is not needed, and the method is more flexible and applicable.

Description

Technical Field

[0001] This utility model relates to the field of automatic control technology, and in particular to an AGC auxiliary frequency regulation control device for heating units. Background Technology

[0002] Heating units are generator sets that provide heat energy to users. They typically generate heat energy by burning fossil fuels (such as coal and natural gas) or by utilizing other energy sources (such as geothermal and solar energy), and then deliver the heat energy to users through a heating network. A heating unit control device is a device used to control and regulate the operating status of the heating unit. It is crucial for ensuring the stable and efficient operation of the heating system. Heating unit control devices are widely used in heating systems. Whether it is a large commercial heating system or a small household heating device, all need to be equipped with corresponding control devices to ensure the normal operation of the system.

[0003] Existing heating unit control devices typically lack automatic frequency regulation capabilities and cannot automatically adjust the unit's load output according to changes in grid load. This necessitates frequent operation and control by staff, resulting in a lack of flexibility.

[0004] Therefore, to address the issue that existing heating unit control devices typically lack automatic frequency regulation and flexibility, an AGC-assisted frequency regulation control device for heating units with an AGC auxiliary module can be designed. This device can monitor load changes in the power system in real time and automatically adjust the power output of the heating unit to compensate for these changes. This helps maintain the frequency stability of the power system, prevents system collapse caused by load fluctuations, and provides a rapid response and improved efficiency. Utility Model Content

[0005] To overcome the problem that existing heating unit control devices usually do not have automatic frequency regulation function and lack flexibility.

[0006] The technical solution of this utility model is as follows: AGC auxiliary frequency regulation control device for heating units, including a housing, a detection module, an AGC auxiliary module, a PLC controller, and a door. A detection module for detecting the working status of the heating unit is detachably installed on the inner side of the rear end of the housing. The detection module is detachably connected to the rear end of the housing by bolts. An AGC auxiliary module for real-time monitoring of power system load changes and automatic adjustment of the power output of the heating unit is fixedly installed at the front end of the detection module. A door for opening and closing is provided at the front end of the housing. A PLC controller for controlling the internal detection module and AGC auxiliary module is fixedly installed in the middle of the outer side of the door. Through holes of different shapes are evenly distributed from the rear end of the housing to the right to match the detection module. Multiple sets of heat dissipation slots for heat dissipation are evenly distributed from top to bottom at both ends of the housing.

[0007] Preferably, the AGC auxiliary module includes a load frequency control module, a control performance monitoring module, a generator power generation plan module, an exchange power plan module, a data acquisition and processing module, a communication interface module, and a control execution module. A load frequency control module is fixedly installed at the upper left corner of the front end of the detection module to adjust the generator output according to the deviation of the system frequency in order to maintain the stability of the system frequency.

[0008] Preferably, the lower end of the load frequency control module is equipped with a control performance monitoring module for recording and analyzing various data during the control process in order to optimize and adjust the control strategy. The lower end of the control performance monitoring module is equipped with a generator generation plan module for formulating and updating the power generation plans of each generator set to ensure the economy and reliability of the power system.

[0009] Preferably, the right end of the load frequency control module is equipped with an exchange power planning module for formulating and executing exchange power plans, ensuring that power exchange between different areas proceeds according to the predetermined plan, so as to maintain the balance and stability of the entire power system. The lower end of the exchange power planning module is equipped with a data acquisition and processing module for collecting various real-time data in the power system.

[0010] Preferably, the lower end of the data acquisition and processing module is equipped with a communication interface module for timely receiving external system instructions and data and sending its own control instructions and data to the external system. The lower end of the unit power generation planning module and the communication interface module is equipped with a control execution module for sending control signals to achieve precise control of generator output. The load frequency control module, control performance monitoring module, unit power generation planning module, switching power planning module, data acquisition and processing module, communication interface module and control execution module are electrically connected to each other through connecting lines and electrically connected to the detection module.

[0011] Preferably, the detection module includes a detector and a mounting plate. The detector is equipped with temperature, pressure and flow sensing modules for real-time monitoring and control of the operating parameters of the heating unit. The rear end of the detector is fixedly connected to the mounting plate for mounting and fixing the detector.

[0012] Preferably, the rear end of the mounting plate is provided with multiple sets of insertion holes for connecting to different heating units from left to right, and the four corners of the surface of the mounting plate are provided with mounting holes for mounting and fixing the mounting plate.

[0013] The beneficial effects of this utility model are:

[0014] 1. By setting up an AGC auxiliary module, the load changes of the power system can be monitored in real time, and the power output of the heating unit can be automatically adjusted to compensate for these changes. This helps to maintain the frequency stability of the power system, prevent system collapse caused by load fluctuations, and can play a role in rapid response and improved efficiency. It does not require frequent operation by staff and is more flexible and applicable. Attached Figure Description

[0015] Figure 1 The diagram shown is a three-dimensional structural schematic of the AGC auxiliary frequency regulation control device for the heating unit of this utility model.

[0016] Figure 2 The diagram shown is a three-dimensional structural schematic of the AGC auxiliary frequency regulation control device for the heating unit of this utility model from another angle.

[0017] Figure 3 The diagram shown is a three-dimensional structural schematic of the AGC auxiliary frequency control device for heating units according to this utility model.

[0018] Figure 4 The diagram shown is a three-dimensional structural schematic of the detection module of the AGC auxiliary frequency regulation control device for heating units according to this utility model.

[0019] Explanation of reference numerals in the attached diagram: 1. Cabinet; 4. PLC controller; 5. Cabinet door; 6. Heat dissipation duct; 7. Through hole; 201. Detector; 202. Mounting plate; 203. Socket; 204. Mounting hole; 301. Load frequency control module; 302. Control performance monitoring module; 303. Unit power generation planning module; 304. Switching power planning module; 305. Data acquisition and processing module; 306. Communication interface module; 307. Control execution module. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] A combined heat and power (CHP) unit is a thermal power device that can both generate electricity and supply heat to the outside world. It is the core part of a CHP system and mainly consists of a boiler, a steam turbine, a generator, and a heating system. It generates steam by burning fuels (such as coal, natural gas, biomass, etc.), which drives the steam turbine to rotate and drive the generator to generate electricity. At the same time, some steam is extracted from the steam turbine or the exhaust steam of the steam turbine is used to meet the heating demand.

[0022] Basic principle:

[0023] Power generation process: Fuel is burned in the boiler, heating water into high-temperature and high-pressure steam. The steam enters the steam turbine, impacting the turbine blades and causing the turbine rotor to rotate. The turbine rotor is connected to the generator rotor through a coupling, driving the generator to rotate. Based on the principle of electromagnetic induction, the generator converts mechanical energy into electrical energy for output.

[0024] Heating process: In steam turbines, there are two main heating pathways depending on the heating method. One is to extract steam at a certain pressure and temperature from the intermediate stage of the steam turbine. This steam transfers heat to the heating network water through the heating network heater, and the heating network water is then transported to users through the heating pipeline network. The other is to use the exhaust steam of the steam turbine for heating. The exhaust steam directly enters the heating tube bundle of the heating network heater or condenser to transfer heat to the heating network water.

[0025] A heating unit control device is a device used to control and regulate the operating status of a heating unit, and it is crucial for ensuring the stable and efficient operation of the heating system.

[0026] Heating unit control devices typically integrate multiple control functions, including but not limited to temperature control, pressure control, and flow control. These control functions are implemented through precise sensors and advanced control algorithms, enabling real-time monitoring of various parameters of the heating system and automatic adjustments based on actual needs. For example, when the outdoor temperature drops, the control device can automatically increase the output power of the heating unit to ensure stable indoor temperature; when the heating system pressure is too high, the control device can automatically adjust the valve opening to reduce system pressure and ensure safe system operation.

[0027] In addition, the heating unit control device also has intelligent management functions. By connecting with the remote monitoring system, users can remotely monitor and manage the heating unit. This not only improves management efficiency but also reduces the cost and risk of manual intervention. At the same time, the control device can also record and analyze the operating data of the heating system, providing strong support for system optimization and upgrading.

[0028] In heating systems, heating unit control devices are widely used. Whether it is a large commercial heating system or a small household heating system, it is necessary to equip it with corresponding control devices to ensure the normal operation of the system. Moreover, with the continuous advancement of technology and the continuous development of the market, the performance and functions of heating unit control devices are also constantly being improved and perfected.

[0029] The heating unit control device is an indispensable and important component of the heating system. Through precise control and intelligent management, it ensures the stable and efficient operation of the heating system, providing a comfortable heating environment for people's lives and work. However, heating unit control devices often encounter some problems during actual use. Below are some common problems and their causes: 1. Temperature Too High or Too Low: The heating unit control device may encounter situations where the temperature is too high or too low, leading to poor heating effect or energy waste. Causes: High temperature may be due to inaccurate setting parameters or excessive operating time; low temperature may be due to damage to the temperature sensing element of the thermal control device or a faulty temperature sensor, resulting in inaccurate signals. 2. Adjustment Malfunction or Large Error: The control device may malfunction or have large errors when adjusting heating parameters, affecting the stable operation of the heating system. Causes: This may be due to problems with the control valves, such as valve jamming or leakage, or faults in electrical components in the control system, such as poor sensor wiring or DCS card channel failure. 3. Blockage leading to poor circulation: Blockages may occur in the heating system, causing increased pump head and reduced flow rate, thus affecting heating efficiency. Causes: System blockages may be due to accumulated debris or dirt in the pipes, or due to improper pipe design or installation. 4. Undersized heat exchanger or scaling: Undersized heat exchangers or severe scaling can lead to insufficient heat exchange, affecting heating efficiency. Causes: Undersized heat exchangers may be due to calculation errors during design or increased actual demand; scaling may be due to substandard softened water in the boiler room or heating station, or years of disrepair. 5. Improper operation or lax management: Operators in heating management units may operate improperly or manage poorly due to reasons such as lack of certification, lack of responsibility, or lack of understanding of procedures, thus affecting heating efficiency. Causes: This may be due to a lack of management mechanisms, insufficient employee training, or inadequate supervision within the heating management unit.

[0030] Currently, various types of heating unit control devices exist on the market, aiming to achieve intelligent management, precise control, and high energy efficiency in heating systems. For example: 1. Manual valve control for underfloor heating manifolds: After hot water from the underfloor heating system enters the manifold, it is distributed to each heating area by manually adjusting the valves on the manifold. Adjusting the valve size controls the room temperature. Problem: Manual adjustment is cumbersome, requiring users to manually adjust the valves, making it less intelligent and convenient. 2. Temperature control panel with electric actuator control: The temperature control panel and electric actuator are connected via wires. Users only need to adjust the temperature on the temperature control panel, which then sends a command to control the electric actuator to adjust the valve opening, thereby controlling the amount of water supplied to the heating area. When the room temperature reaches the set temperature, the temperature control panel closes the valve to stop heating; when the temperature drops below the set temperature, it opens the valve to resume heating. Problem: Although more intelligent than manual control, it relies on wired connections, which may lead to issues such as aging wiring and unstable connections. 3. Heat Exchange Station Heating Automation Control System: This system consists of sensors, measuring instruments, a PLC, actuators, field level gauges, and an industrial control computer. The PLC receives and processes data from the heat exchange station, writes automatic control programs through I / O modules, and completes the relevant actions of the frequency converter, electric regulating valve, and water supply pump. The industrial control computer monitors system operating parameters and issues alarm signals when abnormalities occur. Problems: The system is highly complex and has high maintenance costs. Furthermore, due to its reliance on multiple devices and sensors, issues such as poor communication between devices and data errors may arise. Various types of heating unit control devices exist on the market, each with its own working principles and advantages, but all also present certain problems and challenges. Selection and use require careful consideration and decision-making based on specific needs and scenarios.

[0031] Please see Figures 1-2 This utility model provides an embodiment of an AGC auxiliary frequency modulation control device for a heating unit, comprising a housing 1, a detection module, an AGC auxiliary module, a PLC controller 4, and a door 5. A detection module for detecting the working status of the heating unit is detachably installed on the inner rear end of the housing 1. The detection module is detachably connected to the rear end of the housing 1 by bolts. An AGC auxiliary module for real-time monitoring of power system load changes and automatic adjustment of the power output of the heating unit is fixedly installed on the front end of the detection module. A door 5 for opening and closing is provided at the front end of the housing 1. A PLC controller 4 for controlling the internal detection module and the AGC auxiliary module is fixedly installed on the outer middle of the door 5. Through holes 7 of different shapes are evenly distributed from the rear end of the housing 1 to the right to match the detection module. Multiple sets of heat dissipation slots 6 for heat dissipation are evenly distributed from top to bottom on both the left and right ends of the housing 1.

[0032] Please see Figure 3In this embodiment, the AGC auxiliary module includes a load frequency control module 301, a control performance monitoring module 302, a generator set power generation plan module 303, a power exchange plan module 304, a data acquisition and processing module 305, a communication interface module 306, and a control execution module 307. A load frequency control module 301, used to adjust the generator output based on system frequency deviation to maintain system frequency stability, is fixedly installed at the upper left corner of the front end of the detection module. A control performance monitoring module 302, used to record and analyze various data during the control process to optimize and adjust the control strategy, is located at the lower end of the load frequency control module 301. A generator set power generation plan module 303, used to formulate and update the power generation plans of each generator set to ensure the economy and reliability of the power system, is located at the lower end of the load frequency control module 301. A power exchange plan, used to formulate and execute power exchange plans between different areas, is located at the right end of the load frequency control module 301. The power exchange is carried out according to a predetermined plan to maintain the balance and stability of the entire power system. The lower end of the power exchange planning module 304 is equipped with a data acquisition and processing module 305 for collecting various real-time data in the power system. The lower end of the data acquisition and processing module 305 is equipped with a communication interface module 306 for timely receiving external system instructions and data and sending its own control instructions and data to the external system. The lower end of the generator generation planning module 303 and the communication interface module 306 is equipped with a control execution module 307 for sending control signals to achieve precise control of generator output. The load frequency control module 301, control performance monitoring module 302, generator generation planning module 303, power exchange planning module 304, data acquisition and processing module 305, communication interface module 306 and control execution module 307 are electrically connected to each other through connecting lines and are electrically connected to the detection module.

[0033] Please see Figures 3-4 In this embodiment, the detection module includes a detector 201 and a mounting plate 202. The detector 201 is equipped with temperature, pressure and flow sensing modules for real-time monitoring and control of the operating parameters of the heating unit. The rear end of the detector 201 is fixedly connected to the mounting plate 202 for mounting and fixing the detector 201. The rear end of the mounting plate 202 is evenly distributed with multiple sets of insertion holes 203 for connecting with different heating units from left to right. The four corners of the surface of the mounting plate 202 are surrounded by mounting holes 204 for mounting and fixing the mounting plate 202.

[0034] When working, first open the door 5 of the box 1, install and fix the detection module and AGC auxiliary module inside the box 1, and install and fix the mounting plate 202 on the inner side of the rear end of the box 1 through the mounting hole 204 on the mounting plate 202 at the rear end of the detector 201.

[0035] Then place the housing 1 in the corresponding stable position and connect it to the corresponding heating unit through the socket 203 at the rear end of the detector 201;

[0036] Then close the door 5, and control the internal detection module and AGC auxiliary module to work through the PLC controller 4 on the door 5;

[0037] During the operation of the detection module and the AGC auxiliary module, the detection module monitors the operating parameters of the heating unit in real time, such as temperature, pressure, and flow rate. The AGC auxiliary module monitors the load changes of the power system in real time and automatically adjusts the power output of the heating unit to compensate for these changes. For example, the load frequency control module 301 adjusts the generator output according to the deviation of the system frequency to maintain the stability of the system frequency. The control performance monitoring module 302 monitors and evaluates the control performance of the AGC to ensure the effectiveness and accuracy of the control strategy. The generator unit power generation planning module 303 formulates and updates the power generation plans of each generator unit, including the start-up and shutdown times and output levels of the units. The power exchange planning module 304... The system formulates and executes plans for these power exchanges to ensure that power exchange between regions proceeds according to the predetermined plan, thereby maintaining the balance and stability of the entire power system. The data acquisition and processing module 305 collects various real-time data from the power system, such as generator output, load demand, system frequency, and voltage, and processes and analyzes this data to provide accurate data support for the AGC's control strategy. The communication interface module 306 ensures that the AGC system can receive instructions and data from external systems in a timely manner and send its own control instructions and data to external systems. The control execution module 307 is directly connected to the generator's speed governor and power regulating device, and achieves precise control of the generator output by sending control signals.

[0038] Through the above steps, by setting up the AGC auxiliary module, the load changes of the power system can be monitored in real time, and the power output of the heating unit can be automatically adjusted to compensate for these changes. This helps to maintain the frequency stability of the power system, prevent system collapse caused by load fluctuations, and can play a role in rapid response and improved efficiency. It does not require frequent operation by staff and is more flexible and applicable. This solves the problem that existing heating unit control devices usually do not have automatic frequency regulation function, cannot automatically adjust the load output of the unit according to changes in grid load, and require frequent operation and control by staff, lacking flexibility.

Claims

1. An AGC auxiliary frequency modulation control device for a heating unit, comprising a housing (1); characterized in that: It also includes a detection module, an AGC auxiliary module, a PLC controller (4), and a door (5). The detection module for detecting the working status of the heating unit is detachably installed on the inner side of the rear end of the housing (1). The detection module is detachably connected to the rear end of the housing (1) by bolts. The front end of the detection module is fixedly installed with an AGC auxiliary module for real-time monitoring of power system load changes and automatic adjustment of the power output of the heating unit. The front end of the housing (1) is provided with a door (5) for opening and closing. The middle of the outer side of the door (5) is fixedly installed with a PLC controller (4) for controlling the internal detection module and the AGC auxiliary module. The rear end of the housing (1) is evenly distributed with through holes (7) of different shapes for matching the detection module from top to bottom. The left and right ends of the housing (1) are evenly distributed with multiple sets of heat dissipation slots (6) for heat dissipation from top to bottom.

2. The AGC auxiliary frequency regulation control device for heating units according to claim 1, characterized in that: The AGC auxiliary module includes a load frequency control module (301), a control performance monitoring module (302), a generator generation planning module (303), an exchange power planning module (304), a data acquisition and processing module (305), a communication interface module (306), and a control execution module (307). The load frequency control module (301) is fixedly installed at the upper left corner of the front end of the detection module to adjust the generator output according to the deviation of the system frequency in order to maintain the stability of the system frequency.

3. The AGC auxiliary frequency regulation control device for heating units according to claim 2, characterized in that: The lower end of the load frequency control module (301) is provided with a control performance monitoring module (302) for recording and analyzing various data in the control process in order to optimize and adjust the control strategy. The lower end of the control performance monitoring module (302) is provided with a generator unit power generation plan module (303) for formulating and updating the power generation plans of each generator unit to ensure the economy and reliability of the power system.

4. The AGC auxiliary frequency regulation control device for heating units according to claim 2, characterized in that: The right end of the load frequency control module (301) is provided with an exchange power planning module (304) for formulating and executing exchange power plans and ensuring that power exchange between regions is carried out in accordance with the predetermined plan in order to maintain the balance and stability of the entire power system. The lower end of the exchange power planning module (304) is provided with a data acquisition and processing module (305) for collecting various real-time data in the power system.

5. The AGC auxiliary frequency regulation control device for heating units according to claim 2, characterized in that: The lower end of the data acquisition and processing module (305) is provided with a communication interface module (306) for timely receiving external system instructions and data and sending its own control instructions and data to the external system. The lower end of the generator unit power generation planning module (303) and the communication interface module (306) is provided with a control execution module (307) for sending control signals to achieve precise control of generator output. The load frequency control module (301), control performance monitoring module (302), generator unit power generation planning module (303), power exchange planning module (304), data acquisition and processing module (305), communication interface module (306) and control execution module (307) are electrically connected to each other through connecting lines and electrically connected to the detection module.

6. The AGC auxiliary frequency regulation control device for heating units according to claim 1, characterized in that: The detection module includes a detector (201) and a mounting plate (202). The detector (201) is equipped with temperature, pressure and flow sensing modules for real-time monitoring and control of the operating parameters of the heating unit. The rear end of the detector (201) is fixedly connected to the mounting plate (202) for mounting and fixing the detector (201).

7. The AGC auxiliary frequency regulation control device for heating units according to claim 6, characterized in that: The rear end of the mounting plate (202) is provided with multiple sets of sockets (203) for connecting with different heating units from left to right. The four corners of the surface of the mounting plate (202) are provided with mounting holes (204) for mounting and fixing the mounting plate (202).

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