Unattended thermal station control system and method

Abstract

The invention relates to the technical field of thermal station control, and discloses an unattended thermal station control system, which comprises a hardware part and a software part, and is characterized in that the hardware part comprises management scheduling level equipment, a field automatic control system, communication equipment, a sensor instrument, a metering instrument and execution equipment; the software part comprises upper computer management software, programming software, debugging software, configuration software, database software and prediction maintenance software. Through an intelligent diagnosis and prediction system, a remote maintenance and upgrading function, an energy management system, a mobile terminal monitoring APP and a data security and backup mechanism in the prediction maintenance software, the timeliness and accuracy of fault processing can be improved, the downtime caused by faults is reduced, non-planned downtime can be reduced through predictive maintenance, and the maintenance efficiency is improved. The reliability and the stability of the heating station are improved; and meanwhile, remote maintenance and improvement can be realized, and the working efficiency and flexibility of operation and maintenance personnel can be improved through a mobile terminal monitoring APP.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power station control, and in particular to an unmanned thermal power station control system and method. Background Art

[0002] The thermal power station, also often referred to as the heat exchange station, is a vital component in the centralized heating system. It mainly acts as an intermediary for intermediate heat exchange and heat redistribution. In the centralized heating system, the hot water output by the heat source (such as a centralized heating boiler room or a cogeneration unit) is first transported to each thermal power station through the primary heating network. In the thermal power station, the hot water exchanges heat with the secondary heating network, and then the secondary network transports the heated hot water to the user's home.

[0003] The unmanned thermal power station control system is an automated control system that integrates advanced control technology and information technology. It aims to realize remote monitoring, automatic control and intelligent management of the thermal power station. The system collects the operating data of the thermal power station in real time, such as temperature, pressure, flow, etc., through various sensors, actuators, controllers and other equipment installed in the thermal power station, and transmits these data to the remote monitoring center through the communication network.

[0004] A Chinese patent discloses an unattended thermal power station control system and its working method (authorization announcement number CN112197338B). The patented technology measurement module is used to collect real-time operating parameters of the thermal power station, and the video monitoring module is used to collect real-time picture information of the thermal power station. The measurement module and the video monitoring module are connected to the data processing module, and the data processing module is respectively connected to the data storage module and the lower computer module, and the lower computer module is respectively connected to the thermal power station communication module and all control points of the thermal power station; the thermal power station communication module is connected to the dispatching and monitoring center communication module, and the dispatching and monitoring center communication module is respectively connected to the upper computer module, the database module and the data analysis module, and the data analysis module is connected to the upper computer module. The invention has a high degree of automation, improves the safety and stability of the thermal power station operation, saves energy and protects the environment, and reduces labor costs.

[0005] However, when the existing unmanned thermal power station control system is controlling and monitoring the thermal power station, it can only achieve the purpose of monitoring, but cannot diagnose and predict the failure of the thermal power station, and implement timely early warning or alarm, resulting in the need for subsequent shutdown maintenance, affecting the reliability and stability of the thermal power station, and the data security cannot be guaranteed, which is prone to loss or damage. Therefore, those skilled in the art provide an unmanned thermal power station control system and method to solve the problems raised in the above background technology. Summary of the invention

[0006] The object of the present invention is to provide an unmanned thermal power station control system and method to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An unattended thermal power station control system, comprising a hardware part and a software part;

[0009] The hardware part includes management and dispatching level equipment, on-site automatic control system, communication equipment, sensor instruments, metering instruments and execution equipment;

[0010] The software part includes upper computer management software, programming software, debugging software, configuration software, database software and predictive maintenance software.

[0011] As a further solution of the present invention: the management and scheduling level equipment includes a server, a management machine, a terminal, a printer, a communication module and a UPS,

[0012] The server is used to store and process system data and is the data processing center of the system;

[0013] The management machine is used to provide a human-computer interaction interface for monitoring and management of the system;

[0014] The terminal is used for remote access and control of the system;

[0015] The printer is used to print out system data or reports;

[0016] The communication module includes wired communication equipment and wireless communication equipment;

[0017] The UPS is used to provide a stable power supply for the system, ensuring that the power can be maintained for a period of time when the system is powered off.

[0018] As a further solution of the present invention: the field automatic control system includes a PLC control cabinet, communication equipment and an electrical control cabinet. The PLC control cabinet has a built-in PLC processor, which is the core of the control system and is responsible for executing control logic and algorithms to control the operation of field equipment; the communication equipment is a switch or a router, which is used for communication between the field automatic control system and management and scheduling level equipment; the electrical control cabinet includes electrical components and wiring, which are used for electrical control and protection of field equipment.

[0019] As a further solution of the present invention: the sensor instrument includes a pipeline temperature sensor, a pressure sensor, a flow sensor, etc., which are used to collect various physical quantity data during the operation of the thermal power station;

[0020] The metering instruments include heat meters, flow meters, water meters, electricity meters, etc., which are used to accurately measure data such as energy consumption and flow during the operation of the thermal power station;

[0021] The execution equipment includes an electric regulating valve, a water supply pump inverter, a circulation pump inverter, etc., which can automatically adjust the operating parameters and equipment status of the thermal power station according to the instructions of the control system.

[0022] As a further solution of the present invention: the host computer management software includes a human-machine interface, a monitoring function and a control function. The human-machine interface can provide an intuitive operation interface for displaying the real-time operation status, parameter information, alarm records, etc. of the thermal power station. The monitoring function can monitor various operation data of the thermal power station in real time, that is, realize the monitoring of sensor instruments and metering instruments; the control function is used to send control instructions to adjust the operation parameters of the thermal power station.

[0023] As a further solution of the present invention: the programming software includes a programming environment, a programming language and a debugging tool, the programming environment is used to provide a development environment for writing control logic and algorithms, the programming language is used to support a specific programming language to write control programs; the debugging tool is used to test the correctness and performance of the control program.

[0024] As a further solution of the present invention: the debugging software includes online debugging, troubleshooting and simulation functions, the configuration software includes graphical interface design, data binding and alarm configuration, the graphical interface design can provide rich graphic libraries and configuration tools for designing the graphical interface of the thermal power station monitoring interface; the data binding is used to bind the graphic elements of the monitoring interface with the data in the real-time database to realize dynamic display of the data.

[0025] As a further solution of the present invention: the database software includes data storage, data query and data analysis, the data storage is used to store real-time data, historical data, etc. of the thermal power station; the data query includes providing a data query function, allowing the user to query and export data as needed; the data analysis is used to help users explore the patterns and trends behind the data.

[0026] As a further solution of the present invention: the predictive maintenance software includes an intelligent diagnosis and prediction system, a remote maintenance and upgrade function, an energy management system, a mobile monitoring APP and a data security and backup mechanism,

[0027] The intelligent diagnosis and prediction system uses artificial intelligence algorithms to perform fault diagnosis and performance prediction on the thermal power station. When the system detects an abnormality or potential fault, it can automatically trigger an early warning or alarm, and provide possible fault causes and solutions to help operation and maintenance personnel quickly locate the problem and take measures;

[0028] The remote maintenance and upgrade function is used to equip the control system with remote maintenance and upgrade functions, allowing operation and maintenance personnel to perform software upgrades, parameter adjustments or fault diagnosis on the system through a remote network;

[0029] The energy management system is used to monitor and analyze the energy consumption data of the thermal power station, and provide energy consumption reports and energy-saving suggestions;

[0030] The mobile terminal monitoring APP is used to develop the terminal monitoring APP, allowing operation and maintenance personnel to view the operating status and parameter information of the thermal power station anytime and anywhere through mobile devices such as mobile phones;

[0031] The data security and backup mechanism is used to strengthen the data security and backup mechanism of the control system, ensure the security and integrity of the system data, and adopt measures such as encrypted transmission and permission management to protect the data from illegal access and tampering. At the same time, it also locates and backs up system data to prevent data loss.

[0032] A method for controlling an unattended thermal power station, the method comprising the following steps:

[0033] S1. System startup: First, the control system performs a power-on self-test to ensure that the hardware part of the system can operate normally. At the same time, the software part is installed and necessary configurations are performed, such as database connection, device address setting, etc.

[0034] S2. Data collection and monitoring: Through the PLC control cabinet, communication equipment and electrical control cabinet in the field automatic control system in the hardware part, the sensor instruments can collect various data of the thermal power station in real time, such as temperature, pressure, flow, etc., and use the graphical interface designed by the configuration software to display the collected data to the operator or the monitoring center in an intuitive way;

[0035] S3, Data analysis and decision-making: The database software processes the collected data and automatically or assists the operator in making control decisions based on the data analysis system, such as adjusting the frequency of the circulation pump, starting and stopping the water supply pump, etc.;

[0036] S4, control instruction execution: The upper computer management software generates corresponding control instructions according to the control decision, and the control instructions are sent to the PLC and other field control devices through the communication network, and the PLC executes the specific control operation;

[0037] S5. Monitoring feedback: The system can detect various operating data in real time to ensure the stable operation of the system, and can perform maintenance operations on the system through the remote network, such as parameter adjustment, software upgrade, etc.;

[0038] S6. Data reports and analysis: The system can automatically generate operation reports, including daily reports, weekly reports, monthly reports, etc., and analyze the report data to evaluate the operating efficiency and economy of the thermal power station;

[0039] S7. Data reporting and analysis: Continuously optimize control strategies and algorithms based on data analysis results and operation and maintenance economics to improve system operating efficiency and stability.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. The present invention can improve the timeliness and accuracy of fault handling and reduce the downtime caused by faults through the intelligent diagnosis and prediction system, remote maintenance and upgrade function, energy management system, mobile monitoring APP and data security and backup mechanism in the predictive maintenance software, and reduce unplanned downtime, thereby improving the reliability and stability of the thermal power station; at the same time, remote maintenance can be realized, and the mobile monitoring APP can improve the work efficiency and flexibility of operation and maintenance personnel, and can also effectively prevent data leakage and illegal use, ensuring that data can be quickly restored and system operation can be restored when a system failure occurs.

[0042] 2. The present invention uses integrated hardware and software parts, intelligent data analysis and decision-making, remote monitoring and maintenance, and has complete fault detection and alarm functions, which can detect and handle abnormal situations in a timely manner, and realize efficient, stable operation and unattended management of the thermal power station.

[0043] 3. The present invention can realize remote viewing of the operating status and parameter information of the thermal power station through the upper computer management software, realize actual monitoring and management of the thermal power station, and automatically adjust the operating parameters and equipment status of the thermal power station to realize unattended automatic control. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a framework diagram of an unattended thermal power station control system;

[0045] Figure 2 This is a framework diagram of predictive multi-parameter optimization control in predictive maintenance software for an unmanned thermal power station control system. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] See also Figure 1 ,In an embodiment of the present invention, an unattended thermal power station control system includes a hardware part and a software part;

[0048] The hardware part includes management and dispatching level equipment, on-site automatic control system, communication equipment, sensor instruments, metering instruments and execution equipment;

[0049] The software part includes host computer management software, programming software, debugging software, configuration software, database software and predictive maintenance software.

[0050] Further, in this embodiment, the management and scheduling level equipment includes a server, a management machine, a terminal, a printer, a communication module and a UPS;

[0051] The server is used to store and process system data and is the data processing center of the system;

[0052] The management machine is used to provide a human-computer interaction interface for system monitoring and management;

[0053] The terminal is used to remotely access and control the system;

[0054] The printer is used to print out system data or reports;

[0055] The communication module includes wired communication equipment and wireless communication equipment;

[0056] UPS is used to provide a stable power supply to the system, ensuring that it can be maintained for a period of time when the system loses power.

[0057] Specifically, in this embodiment, the management and scheduling level device is the core management unit of the system, which is responsible for data collection, processing, storage and transmission to ensure the stable operation of the system.

[0058] Preferably, the field automatic control system of this embodiment includes a PLC control cabinet, communication equipment and an electrical control cabinet. The PLC control cabinet has a built-in PLC processor, which is the core of the control system and is responsible for executing control logic and algorithms to control the operation of field equipment. The communication equipment is a switch or a router, which is used for communication between the field automatic control system and the management and scheduling level equipment. The electrical control cabinet includes electrical components and wiring, which are used for electrical control and protection of the field equipment.

[0059] Specifically, in this embodiment, the field automatic control system is the core processor of the control system, which is responsible for executing control logic and algorithms to realize automatic control of field equipment.

[0060] In this embodiment, the sensor instrument includes a pipeline temperature sensor, a pressure sensor, a flow sensor, etc., which are used to collect various physical quantity data during the operation of the thermal power station;

[0061] Metering instruments include heat meters, flow meters, water meters, electricity meters, etc., which are used to accurately measure data such as energy consumption and flow during the operation of the thermal power station;

[0062] The executive equipment includes electric regulating valves, water supply pump inverters, circulation pump inverters, etc., which can automatically adjust the operating parameters and equipment status of the thermal power station according to the instructions of the control system.

[0063] Specifically, in this embodiment, various physical quantity data such as temperature, pressure, flow rate and liquid level during the operation of the thermal power station can be collected in real time through sensor instruments and metering instruments, so as to provide accurate monitoring information for the control system.

[0064] Preferably, the upper computer management software of this embodiment includes a human-machine interface, a monitoring function and a control function. The human-machine interface can provide an intuitive operation interface for displaying the real-time operation status, parameter information, alarm records, etc. of the thermal power station. The monitoring function can monitor various operation data of the thermal power station in real time, that is, realize the monitoring of sensor instruments and metering instruments; the control function is used to send control instructions to adjust the operation parameters of the thermal power station.

[0065] Specifically, this embodiment can provide a human-computer interaction interface for remote monitoring and management of the thermal power station. The management personnel can view the operating status, parameter information and alarm records of the thermal power station through the software and perform corresponding operations and controls.

[0066] In this embodiment, the programming software preferably includes a programming environment, a programming language and a debugging tool. The programming environment is used to provide a development environment for writing control logic and algorithms. The programming language is used to support a specific programming language to write control programs; and the debugging tool is used to test the correctness and performance of the control program.

[0067] Specifically, the present embodiment can be used to program the control logic and algorithm of controllers such as PLCs through programming software to realize automatic control functions.

[0068] Preferably, the debugging software of this embodiment includes online debugging, troubleshooting and simulation functions, and the configuration software includes graphical interface design, data binding and alarm configuration. The graphical interface design can provide a rich graphic library and configuration tools for designing the graphical interface of the thermal power station monitoring interface; data binding is used to bind the graphic elements of the monitoring interface with the data in the real-time database to realize dynamic display of the data.

[0069] Specifically, in this embodiment, the debugging software can be used to debug and test the control system to ensure that the system operates as expected.

[0070] Preferably, the database software of this embodiment includes data storage, data query and data analysis. The data storage is used to store real-time data, historical data, etc. of the thermal power station; the data query includes providing a data query function, allowing the user to query and export data as needed; the data analysis is used to help the user explore the patterns and trends behind the data.

[0071] Specifically, in this embodiment, database software can be used to store data collected by the system and information such as operation logs, so as to provide support for data analysis and management.

[0072] In this embodiment, the predictive maintenance software preferably includes an intelligent diagnosis and prediction system, a remote maintenance and upgrade function, an energy management system, a mobile monitoring APP, and a data security and backup mechanism;

[0073] The intelligent diagnosis and prediction system uses artificial intelligence algorithms to perform fault diagnosis and performance prediction on thermal power stations. When the system detects an abnormality or potential fault, it can automatically trigger an early warning or alarm, and provide possible fault causes and solutions to help operation and maintenance personnel quickly locate the problem and take measures;

[0074] The remote maintenance and upgrade function is used to equip the control system with remote maintenance and upgrade functions, allowing operation and maintenance personnel to upgrade the system software, adjust parameters or diagnose faults through the remote network;

[0075] The energy management system is used to monitor and analyze the energy consumption data of the thermal power station, and provide energy consumption reports and energy-saving suggestions;

[0076] The mobile monitoring APP is used to develop the monitoring APP, allowing operation and maintenance personnel to view the operation status and parameter information of the thermal power station anytime and anywhere through mobile devices such as mobile phones;

[0077] The data security and backup mechanism is used to strengthen the data security and backup mechanism of the control system, ensure the security and integrity of the system data, and adopt measures such as encrypted transmission and permission management to protect the data from illegal access and tampering. At the same time, it also locates and backs up system data to prevent data loss.

[0078] Specifically, the present embodiment can improve the timeliness and accuracy of fault handling through the intelligent diagnosis and prediction system, reduce the downtime caused by faults, and perform predictive maintenance to improve the reliability and stability of the thermal power station; the remote maintenance and upgrade function can reduce the number of on-site maintenance times and reduce maintenance costs; the data security and backup mechanism can enhance data security and perform backup to prevent data loss.

[0079] Embodiment 2

[0080] A method for controlling an unattended thermal power station, the method comprising the following steps:

[0081] S1. System startup: First, the control system performs a power-on self-test to ensure that the hardware part of the system can operate normally. At the same time, the software part is installed and necessary configurations are performed, such as database connection, device address setting, etc.

[0082] S2. Data collection and monitoring: Through the PLC control cabinet, communication equipment and electrical control cabinet in the field automatic control system in the hardware part, the sensor instruments can collect various data of the thermal power station in real time, such as temperature, pressure, flow, etc., and use the graphical interface designed by the configuration software to display the collected data to the operator or the monitoring center in an intuitive way;

[0083] S3, Data analysis and decision-making: The database software processes the collected data and automatically or assists the operator in making control decisions based on the data analysis system, such as adjusting the frequency of the circulation pump, starting and stopping the water supply pump, etc.;

[0084] S4, control instruction execution: The upper computer management software generates corresponding control instructions according to the control decision, and the control instructions are sent to the PLC and other field control devices through the communication network, and the PLC executes the specific control operation;

[0085] S5. Monitoring feedback: The system can detect various operating data in real time to ensure the stable operation of the system, and can perform maintenance operations on the system through the remote network, such as parameter adjustment, software upgrade, etc.;

[0086] S6. Data reports and analysis: The system can automatically generate operation reports, including daily reports, weekly reports, monthly reports, etc., and analyze the report data to evaluate the operating efficiency and economy of the thermal power station;

[0087] S7. Data reporting and analysis: Continuously optimize control strategies and algorithms based on data analysis results and operation and maintenance economics to improve system operating efficiency and stability.

[0088] The present invention is further explained and illustrated by a specific embodiment below:

[0089] A certain thermal power company used the steam extraction heat source of a certain power plant's 2×350MW units and 2×680MW units to build a 524-kilometer main and branch heating pipeline network, which is responsible for the centralized heating of the city's new urban area, old urban area and high-tech park area, accounting for about 91% of the centralized heating area in the urban area. Among them, the heating capacity of line #1 is 9.5 million m2, the heating capacity of line #2 is 12 million m2, and the total heating capacity is 21.5 million m2. As of 2024, the actual heating area is 19.56 million m2, and the actual heating areas of line #1 and line #2 are 9.12 million m2 and 10.44 million m2 respectively; there are about 760 heat exchange stations within the heating range.

[0090] The implementation plan of the unattended thermal power station control system is as follows:

[0091] The unattended system is divided into hardware and software parts. The control system performs a power-on self-test to ensure that the hardware part of the system can operate normally. At the same time, the software part is installed and necessary configurations are performed, such as database connection, device address setting, etc. According to the different operating seasons of the system, the user manually sets the corresponding system operating conditions.

[0092] It is necessary to provide different operating mode options for the system operating conditions. The main operating modes can be divided into: summer cooling mode and winter heating mode. This function is mainly implemented by the control system. It does not involve hardware implementation on site and is set by the operator. According to the actual operating mode of the system, the user can set the corresponding system operating mode.

[0093] The main system working modes include automatic, manual and local control modes;

[0094] 1. The automatic control mode is completed by the corresponding control program, without the need for human involvement, and can be automatically operated according to the built-in control logic;

[0095] 2. In manual control mode, authorized operators can use the mouse or keyboard on the computer screen to modify the set operating parameters according to the dynamic graphic display of the equipment status, so that the operator can control it;

[0096] 3. Local control mode means that in an emergency, the operator directly and manually operates each device, which serves as the last guarantee for the safe operation of the system.

[0097] The mode control function is mainly realized by the control system. It does not involve the implementation of hardware points on site and is set by the operating personnel. Through the PLC control cabinet, communication equipment and electrical control cabinet of the hardware part of the thermal power station, the sensor instruments can collect various data of the thermal power station in real time, such as temperature, pressure, flow, etc., and use the graphical interface designed by the configuration software to display the collected data to the operator or monitoring center in an intuitive way. The database software processes the collected data and automatically or assists the operator to make control decisions based on the data analysis system, such as adjusting the frequency of the circulation pump, starting and stopping the water supply pump, etc. The upper computer management software generates corresponding control instructions according to the control decision, and the control instructions are sent to the PLC and other on-site control equipment through the communication network. The PLC performs specific control operations. The controller can cooperate with the electrical control cabinet and process to realize full automatic control of the heat exchange station, realize safe start and stop of the unit, and achieve unmanned operation, and finally constitute a complete monitoring system.

[0098] 1. Main control functions in thermal power stations

[0099] 1.1 Monitoring of system operating parameters

[0100] Monitor outdoor environmental temperature and humidity; monitor the supply and return water temperature of the hot water system; monitor the supply and return water pressure of the hot water system; monitor the circulation flow of the hot water system; monitor the temperature and pressure of the energy system water distributor; monitor the temperature and pressure of the energy system water collector; monitor the primary side circulation flow; monitor the supply and return water pressure difference of the hot water system; monitor the water replenishment system of the energy station; monitor the power consumption of the equipment.

[0101] 1.2 Heat pump host operation monitoring

[0102] The 7 heat pump units collect the operating parameters and control signals of the units (including but not limited to outlet water temperature setting, start and stop control, operating mode, operating status, operating load, fault alarm, inlet / outlet water temperature, water flow switch status, etc.) through the Modbus-Rtu protocol.

[0103] 1.3 Heating circulation pump operation monitoring

[0104] Monitor the start and stop status of the circulating pump; monitor the fault status of the circulating pump; monitor the manual and automatic mode status of the circulating pump; control the start and stop output of the circulating pump; monitor the operating frequency of the circulating pump inverter; control the frequency output of the circulating pump inverter.

[0105] Circulation pump start and stop operation output; monitor the circulation pump inverter operating frequency; control the circulation pump inverter frequency output.

[0106] 1.4 Water supply pump operation monitoring

[0107] Monitor the start and stop status of the water supply pump; monitor the fault status of the water supply pump; monitor the manual and automatic mode status of the water supply pump; control the start and stop operation output of the water supply pump; monitor the operating frequency of the water supply pump inverter; control the frequency output of the water supply pump inverter.

[0108] 1.5 One-network circulating pump operation monitoring

[0109] Monitor the start and stop status of the circulating pump; monitor the fault status of the circulating pump; monitor the manual and automatic mode status of the circulating pump; control the start and stop operation output of the circulating pump; monitor the operating frequency of the circulating pump inverter; control the frequency output of the circulating pump inverter.

[0110] 1.6 Electric on / off valve operation monitoring

[0111] Monitor the open state of the electric valve; monitor the closed state of the electric valve; control the switch output of the electric valve.

[0112] 1.7 Electric control valve operation monitoring

[0113] Monitor the opening of the regulating valve; control the opening of the regulating valve.

[0114] 1.8 System power consumption monitoring

[0115] The electricity consumption parameters of the electric meter (including but not limited to three-phase voltage, three-phase current, three-phase power, total active power, power factor, current transformation ratio, total power consumption, etc.) are collected through the Modbus-Rtu protocol.

[0116] 2. Heat source system monitoring

[0117] 2.1 Heat pump system operating condition control

[0118] According to the different seasons of system operation, the user manually sets the corresponding system operating conditions. It is necessary to provide different operating mode options for the system operating conditions. The main operating modes can be divided into: summer cooling mode and winter heating mode. This function is mainly implemented by the control system, and does not involve hardware point implementation on site, and is set by the operator.

[0119] 2.2 Heat pump system mode control

[0120] According to the actual operation mode of the system, the user can set the corresponding system operation mode. The main system working modes include automatic, manual and local control modes.

[0121] 2.3 System control mode

[0122] In order to facilitate the user to manage the system control with one key, it is necessary to set the system to a one-key start and stop control mode. The main system control modes can be divided into: one-key start and one-key stop.

[0123] 2.4 System pressure difference control

[0124] The terminal circulating water pump is frequency-controlled according to the supply and return water pressure difference of the heating terminal system, and the supply and return water pressure difference of the system is automatically regulated.

[0125] 2.5 Electric valve switch control of the unit

[0126] According to the changes in system operating load, the host machine is automatically loaded and unloaded, and the evaporator / condenser electric valve of the unit is switched on and off before and after the unit is loaded.

[0127] 2. System startup sequence

[0128] The start / stop of the heat pump unit, various circulating water pumps, and electric regulating valves are controlled according to the time and sequence compiled by the program, and the interlocking, linkage and program control between various devices are realized. The central control computer instructs the heat pump unit control device to complete the corresponding control function through the field programmable controller according to the overall energy saving goal of the energy station.

[0129] 2.7 Other Content Controls

[0130] In order to facilitate system control, it is necessary to provide limit control function for the basic operating data of the system. The main basic data include:

[0131] A) Power supply voltage limit monitoring of each device, including the main engine, circulating water pump, etc.;

[0132] B) Limit monitoring of various temperature monitoring points during system operation;

[0133] C) Limit monitoring of various pressure monitoring points during system operation;

[0134] D) Limit monitoring of the operating frequency monitoring points of each circulating pump;

[0135] E) Other monitoring parameters of system operation, such as limit monitoring of outdoor ambient temperature, used to regulate system operating conditions.

[0136] 3. Heat pump operation monitoring

[0137] 3.1 Host start and stop control

[0138] According to the actual load and temperature of the system operation, the host is started and stopped according to the set host startup temperature and shutdown temperature.

[0139] 3.2 Host load control

[0140] According to the actual load and temperature of the system operation, the host is loaded and unloaded according to the set host load and load reduction. During use, the number of hosts to be turned on is determined based on the change in load, and the host operation is optimized to be in the best working state to achieve the purpose of energy saving; each time, the host with the least cumulative running time should be started to achieve a balance in running time. According to the change in heat load, outdoor air temperature and the principle of the most energy-saving control of system operation, the outlet water temperature of the unit is reset, and the heating amount is adjusted and controlled.

[0141] 3.3 Host setting temperature control

[0142] The set temperature of the host is adaptively controlled according to the system operating conditions, and further judgment is made based on the enthalpy value of the outdoor air to form an adaptive control result output; the host is controlled by the host providing a Modbus RTU-based protocol communication interface, on this basis, the host is automatically adjusted according to the water supply temperature.

[0143] 3.4 Heat pump system operation analysis

[0144] The system can provide operation reports of heat pump units and supporting equipment, form reports, and generate dynamic curves including hot and cold water supply / return water temperature, flow, pressure, unit operation time, operation status, maximum load, and overall efficiency of the energy station at any time or on a regular basis.

[0145] The system can periodically save the operation records, maintenance records, energy consumption statistics, etc. of this part of the equipment in real time for later data analysis.

[0146] The parameters recorded in the database also include but are not limited to the following parameters: cold and hot water supply / return temperature, input power, cold and hot water flow, evaporation pressure, condensing pressure, etc.; the data recording interval is set to 5 minutes by default and can be changed according to user needs.

[0147] 4. Adaptive predictive multi-parameter optimization control

[0148] Adaptive predictive control technology realizes the unified regulation of multiple parameters, realizes predictive control in the time dimension, makes full use of building big data, and uses algorithms to achieve unmanned control. It has obvious advantages such as efficient control and energy-saving operation. Adaptive predictive multi-parameter optimization control is shown in the attached figure. Figure 2 shown.

[0149] 5. Troubleshooting

[0150] 5.1 Pump fault detection and diagnosis

[0151] 1) Power failure: monitor the power operating parameters of the water pump, detect and diagnose common faults of voltage, current and power, such as phase loss, voltage loss, overload and other faults, and perform self-diagnosis;

[0152] 2) Motor overload: The water pump load is calculated in real time. The unattended system automatically identifies and detects the overload of the water pump motor and automatically implements frequency conversion processing to prevent the motor from burning out.

[0153] 5.2 Sensor fault detection and diagnosis

[0154] 1) Temperature sensor failure: Based on the historical operating data of the temperature sensor, a machine learning algorithm, such as a clustering algorithm, is used to detect and identify the failure of the temperature sensor. The unattended system notifies the operation and maintenance personnel through an alarm device to handle and solve the problem.

[0155] 2) Pressure sensor failure: Based on the historical operating data of the pressure sensor, a machine learning algorithm, such as a clustering algorithm, is used to detect and identify the failure of the pressure sensor. The unattended system notifies the operation and maintenance personnel through an alarm device to handle and solve the problem.

[0156] 3) Flow sensor failure: Based on the historical operation data of the flow sensor, use machine learning algorithms, such as clustering algorithms, to detect and identify flow sensor failures. The unattended system notifies the operation and maintenance personnel through the alarm device to handle and implement a solution.

[0157] 5.3 Electric valve fault detection and diagnosis

[0158] By monitoring the power parameters of the electric valve (electric flow valve, etc.), nearby pipeline parameters, pressure parameters, etc., the electric valve failure can be identified. The unattended system notifies the operation and maintenance personnel through the alarm device to handle and solve the problem.

[0159] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0160] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An unmanned thermal power station control system, characterized in that: Including hardware and software parts; The hardware part includes management and dispatching level equipment, on-site automatic control system, communication equipment, sensor instruments, metering instruments and execution equipment; The software part includes upper computer management software, programming software, debugging software, configuration software, database software and predictive maintenance software.

2. The unmanned thermal power station control system according to claim 1 is characterized in that: The management and scheduling level equipment includes a server, a management machine, a terminal, a printer, a communication module and a UPS; The server is used to store and process system data and is the data processing center of the system; The management machine is used to provide a human-computer interaction interface for monitoring and management of the system; The terminal is used for remote access and control of the system; The printer is used to print out system data or reports; The communication module includes wired communication equipment and wireless communication equipment; The UPS is used to provide a stable power supply for the system, ensuring that the power can be maintained for a period of time when the system is powered off.

3. The unmanned thermal power station control system according to claim 1 is characterized in that: The on-site automatic control system includes a PLC control cabinet, communication equipment and an electrical control cabinet. The PLC control cabinet has a built-in PLC processor, which is the core of the control system and is responsible for executing control logic and algorithms to control the operation of on-site equipment; The communication equipment is a switch or a router, which is used for communication between the on-site automatic control system and the management and dispatching level equipment; the electrical control cabinet includes electrical components and wiring, which are used for electrical control and protection of on-site equipment.

4. The unmanned thermal power station control system according to claim 1 is characterized in that: The sensor instruments include pipeline temperature sensors, pressure sensors, flow sensors, etc., which are used to collect various physical quantity data during the operation of the thermal power station; The metering instruments include heat meters, flow meters, water meters, electricity meters, etc., which are used to accurately measure data such as energy consumption and flow during the operation of the thermal power station; The execution equipment includes an electric regulating valve, a water supply pump inverter, a circulation pump inverter, etc., which can automatically adjust the operating parameters and equipment status of the thermal power station according to the instructions of the control system.

5. The unmanned thermal power station control system according to claim 1 is characterized in that: The host computer management software includes a human-machine interface, monitoring function and control function; The human-machine interface can provide an intuitive operation interface for displaying the real-time operation status, parameter information, alarm records, etc. of the thermal power station; The monitoring function can monitor various operating data of the thermal power station in real time, that is, realize the monitoring of sensor instruments and metering instruments; The control function is used to send control instructions to adjust the operating parameters of the thermal power station.

6. The unmanned thermal power station control system according to claim 1, characterized in that: The programming software includes a programming environment, a programming language and a debugging tool. The programming environment is used to provide a development environment for writing control logic and algorithms, and the programming language is used to support a specific programming language to write control programs; The debugging tool is used to test the correctness and performance of the control program.

7. The unmanned thermal power station control system according to claim 1 is characterized in that: The debugging software includes online debugging, troubleshooting and simulation functions; The configuration software includes graphical interface design, data binding and alarm configuration. The graphical interface design can provide a rich graphic library and configuration tools for designing the graphical interface of the thermal power station monitoring interface; The data binding is used to bind the graphic elements of the monitoring interface with the data in the real-time database to achieve dynamic display of the data.

8. The unmanned thermal power station control system according to claim 1, characterized in that: The database software includes data storage, data query and data analysis. The data storage is used to store real-time data, historical data, etc. of the thermal power station; the data query includes providing a data query function, allowing users to query and export data as needed; the data analysis is used to help users explore the patterns and trends behind the data.

9. The unmanned thermal power station control system according to claim 1, characterized in that: The predictive maintenance software includes an intelligent diagnosis and prediction system, remote maintenance and upgrade functions, an energy management system, a mobile monitoring app, and a data security and backup mechanism; The intelligent diagnosis and prediction system uses artificial intelligence algorithms to perform fault diagnosis and performance prediction on the thermal power station. When the system detects an abnormality or potential fault, it can automatically trigger an early warning or alarm, and provide possible fault causes and solutions to help operation and maintenance personnel quickly locate the problem and take measures; The remote maintenance and upgrade function is used to equip the control system with remote maintenance and upgrade functions, allowing operation and maintenance personnel to perform software upgrades, parameter adjustments or fault diagnosis on the system through a remote network; The energy management system is used to monitor and analyze the energy consumption data of the thermal power station, and provide energy consumption reports and energy-saving suggestions; The mobile terminal monitoring APP is used to develop the terminal monitoring APP, allowing operation and maintenance personnel to view the operating status and parameter information of the thermal power station anytime and anywhere through mobile devices such as mobile phones; The data security and backup mechanism is used to strengthen the data security and backup mechanism of the control system, ensure the security and integrity of the system data, and adopt measures such as encrypted transmission and permission management to protect the data from illegal access and tampering. At the same time, it also locates and backs up system data to prevent data loss.

10. An unattended thermal power station control system according to any one of claims 1 to 9, characterized in that: The method comprises the following steps, S1. System startup: First, the control system performs a power-on self-test to ensure that the hardware part of the system can operate normally. At the same time, the software part is installed and necessary configurations are performed, such as database connection, device address setting, etc. S2. Data collection and monitoring: Through the PLC control cabinet, communication equipment and electrical control cabinet in the field automatic control system in the hardware part, the sensor instruments can collect various data of the thermal power station in real time, such as temperature, pressure, flow, etc., and use the graphical interface designed by the configuration software to display the collected data to the operator or the monitoring center in an intuitive way; S3, Data analysis and decision-making: The database software processes the collected data and automatically or assists the operator in making control decisions based on the data analysis system, such as adjusting the frequency of the circulation pump, starting and stopping the water supply pump, etc.; S4, control instruction execution: The upper computer management software generates corresponding control instructions according to the control decision, and the control instructions are sent to the PLC and other field control devices through the communication network, and the PLC executes the specific control operation; S5. Monitoring feedback: The system can detect various operating data in real time to ensure the stable operation of the system, and can perform maintenance operations on the system through the remote network, such as parameter adjustment, software upgrade, etc.; S6. Data reports and analysis: The system can automatically generate operation reports, including daily reports, weekly reports, monthly reports, etc., and analyze the report data to evaluate the operating efficiency and economy of the thermal power station; S7. Data reporting and analysis: Continuously optimize control strategies and algorithms based on data analysis results and operation and maintenance economics to improve system operating efficiency and stability.

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