Power plant electrical control system

Abstract

The invention discloses a power plant electrical control system, which belongs to the technical field of power plant electrical control, and comprises data acquisition and transmission modules which are distributed at electrical equipment of a power plant and adopt various types of sensors to acquire operation parameters of the electrical equipment in real time, the data is transmitted to the central control unit through communication modes such as a field bus or an industrial Ethernet; the central control unit adopts a high-performance industrial computer or a programmable logic controller, receives real-time data from the data acquisition and transmission module, and processes and analyzes the data by applying an advanced data analysis algorithm and a control strategy; through cooperative work of the data acquisition and transmission module, the central control unit and the communication module, centralized control and monitoring of each electrical device of the power plant are realized, information islands among the devices are broken, the integration level and the cooperative operation capability of the system are improved, and the whole electrical system of the power plant can operate more efficiently.

Description

Technical Field

[0001] The invention belongs to the technical field of power plant electrical control, and in particular relates to an electrical control system for a power plant. Background Art

[0002] Electrical control systems are the key to ensuring stable production and supply of electricity. With the continuous growth of electricity demand and the rapid development of power technology, higher requirements are placed on the performance, reliability and intelligence of power plant electrical control systems.

[0003] At present, the system's integration is low, the control of each electrical equipment is relatively independent, and there is a lack of effective coordination mechanism, resulting in low operating efficiency of the entire power plant's electrical system. There is a lack of effective response capabilities to complex operating conditions and fault diagnosis. When faced with sudden failures, a large amount of manual investigation and processing is often required, and the response speed is slow, which may lead to prolonged power outages and cause great losses to electricity production and users. Traditional control systems have poor compatibility and scalability, and are difficult to adapt to the access of new electrical equipment and technologies, limiting the upgrade and development of power plants. Summary of the invention

[0004] The purpose of the present invention is to propose an electrical control system for a power plant in order to solve the above-mentioned problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: an electrical control system of a power plant, comprising:

[0006] Data acquisition and transmission modules are distributed in various electrical equipment in the power plant. They use various types of sensors to collect the operating parameters of electrical equipment in real time and transmit the data to the central control unit through communication methods such as fieldbus or industrial Ethernet.

[0007] The central control unit uses a high-performance industrial computer or programmable logic controller to receive real-time data from the data acquisition and transmission module, uses advanced data analysis algorithms and control strategies to process and analyze the data, establishes an operation model for electrical equipment, evaluates the equipment operation status and predicts fault trends, generates control instructions and sends them to the equipment control module, and also has data storage and management functions;

[0008] Human-machine interaction interface, which uses a large-screen LCD display and a touch-type operation panel, combined with a graphical user interface design, provides operators with real-time viewing of electrical equipment operating parameters, status information, fault alarms and other functions, and supports remote control operations, historical data query, report generation and printing functions;

[0009] The communication module is responsible for realizing the communication connection between each module of the system and with the external system. It adopts multiple communication protocols, supports the integration with other automation systems of the power plant, and has remote communication function;

[0010] Intelligent diagnosis and early warning module, which uses big data analysis and artificial intelligence technology to conduct in-depth mining and analysis of the collected electrical equipment operation data, establish a fault diagnosis model and early warning indicator system, monitor the health status of equipment in real time, issue early warning signals, and provide fault diagnosis reports and maintenance suggestions;

[0011] The expansion interface module provides a variety of standard interfaces and supports plug-and-play functions.

[0012] As a further description of the above technical solution:

[0013] The sensors in the data acquisition and transmission module include current sensors, voltage sensors, temperature sensors, and vibration sensors.

[0014] As a further description of the above technical solution:

[0015] The data analysis algorithm of the central control unit includes a machine learning algorithm, which is used to analyze the operating data of electrical equipment and predict fault trends.

[0016] As a further description of the above technical solution:

[0017] The generator control submodule in the equipment control module controls the output voltage and frequency of the generator by adjusting the excitation current, and the transformer control submodule adjusts the transformation ratio of the transformer by controlling the tap switch.

[0018] As a further description of the above technical solution:

[0019] The communication protocols adopted by the communication module include TCP / IP, UDP, and Profibus.

[0020] As a further description of the above technical solution:

[0021] The human-computer interaction interface is installed in the power plant control room and runs customized graphical user interface software.

[0022] As a further description of the above technical solution:

[0023] The intelligent diagnosis and early warning module is integrated into the software of the central control unit, and uses big data analysis technology to establish an equipment fault diagnosis model and an early warning indicator system.

[0024] As a further description of the above technical solution:

[0025] The standard interfaces provided by the expansion interface module include USB interface, RS485 interface and Ethernet interface.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0027] 1. In the present invention, through the coordinated work of the data acquisition and transmission module, the central control unit and the communication module, the centralized control and monitoring of various electrical equipment in the power plant are realized, the information islands between the equipment are broken, the system integration and the coordinated operation capability are improved, and the electrical system of the entire power plant can operate more efficiently.

[0028] 2. In the present invention, by adopting advanced data analysis algorithms, machine learning technology and intelligent diagnosis models, intelligent diagnosis and fault warning of electrical equipment are realized. The system can automatically analyze the operating data of the equipment, predict potential faults, take measures in advance, reduce the occurrence of equipment failures, and improve the reliability and stability of the system. At the same time, the application of intelligent control strategies makes the control of electrical equipment more accurate and efficient, further improving the intelligence level of the system.

[0029] 3. In the present invention, the graphical design is adopted through the human-computer interaction interface, the operation is simple and intuitive, and it is convenient for operators to monitor and control. The remote monitoring and management function enables managers to operate and manage the power plant electrical system at any time and any place, thereby improving work efficiency and management level.

[0030] 4. In the present invention, the communication module supports multiple communication protocols and can be seamlessly integrated with other automation systems of the power plant to achieve data sharing and collaborative work. The expansion interface module provides multiple standard interfaces to facilitate access to new electrical equipment and sensors, so that the system can adapt to the needs of technological development and power plant upgrades and renovations, and has good compatibility and scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The system block diagram of an electrical control system of a power plant. DETAILED DESCRIPTION

[0032] 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.

[0033] See also Figure 1 The present invention provides a technical solution: an electrical control system for a power plant, comprising:

[0034] Data acquisition and transmission modules are distributed in various electrical equipment in the power plant. They use various types of sensors to collect the operating parameters of electrical equipment in real time and transmit the data to the central control unit through communication methods such as fieldbus or industrial Ethernet.

[0035] The central control unit uses a high-performance industrial computer or programmable logic controller to receive real-time data from the data acquisition and transmission module, uses advanced data analysis algorithms and control strategies to process and analyze the data, establishes an operation model for electrical equipment, evaluates the equipment operation status and predicts fault trends, generates control instructions and sends them to the equipment control module, and also has data storage and management functions;

[0036] Human-machine interaction interface, which uses a large-screen LCD display and a touch-type operation panel, combined with a graphical user interface design, provides operators with real-time viewing of electrical equipment operating parameters, status information, fault alarms and other functions, and supports remote control operations, historical data query, report generation and printing functions;

[0037] The communication module is responsible for realizing the communication connection between each module of the system and with the external system. It adopts multiple communication protocols, supports the integration with other automation systems of the power plant, and has remote communication function;

[0038] Intelligent diagnosis and early warning module, which uses big data analysis and artificial intelligence technology to conduct in-depth mining and analysis of the collected electrical equipment operation data, establish a fault diagnosis model and early warning indicator system, monitor the health status of equipment in real time, issue early warning signals, and provide fault diagnosis reports and maintenance suggestions;

[0039] Expansion interface module, which provides multiple standard interfaces and supports plug-and-play function;

[0040] The sensors in the data acquisition and transmission module include current sensors, voltage sensors, temperature sensors, and vibration sensors;

[0041] The data analysis algorithm of the central control unit includes a machine learning algorithm for analyzing the operation data of the electrical equipment and predicting the fault trend;

[0042] The generator control submodule in the equipment control module controls the output voltage and frequency of the generator by adjusting the excitation current, and the transformer control submodule adjusts the transformation ratio of the transformer by controlling the tap switch;

[0043] The communication protocols adopted by the communication module include TCP / IP, UDP, and Profibus;

[0044] The human-computer interaction interface is installed in the power plant control room and runs customized graphical user interface software;

[0045] The intelligent diagnosis and early warning module is integrated into the software of the central control unit, and uses big data analysis technology to establish an equipment fault diagnosis model and early warning indicator system;

[0046] The standard interfaces provided by the expansion interface module include USB interface, RS485 interface and Ethernet interface.

[0047] Working principle:

[0048] Implementation of data acquisition and transmission module: current sensors and voltage sensors are installed at the output end of the generator to monitor the output current and voltage of the generator in real time; temperature sensors are installed on the oil tank and windings of the transformer to monitor the oil temperature and winding temperature of the transformer; status sensors are installed on the circuit breakers and contactors of the switch cabinet to monitor their opening and closing status; vibration sensors are installed on the bearings of the motor to monitor the vibration of the motor. The data collected by these sensors are transmitted to the communication interface of the central control unit through the Profibus field bus. In order to ensure the reliability of data transmission, a redundant Profibus bus is used, and the transmitted data is encrypted at the same time;

[0049] Implementation of the central control unit: A high-performance industrial computer is selected as the hardware platform of the central control unit, and professional electrical control software is installed. The software integrates data analysis algorithms, equipment operation models and control strategies. The industrial computer receives data sent by the data acquisition and transmission module in real time, processes and analyzes the data using data analysis algorithms, and evaluates the operating status of the equipment according to the equipment operation model. When abnormal equipment operation is found, the control strategy generates corresponding control instructions and sends them to the equipment control module. At the same time, the industrial computer stores the collected data and analysis results in the local hard disk for subsequent query and analysis;

[0050] Implementation of equipment control module: Taking the generator control submodule as an example, a dedicated generator controller is used to receive control instructions sent by the central control unit, and the excitation current of the generator is controlled by adjusting the output of the excitation regulator, thereby realizing the control of the generator output voltage and frequency. At the same time, the generator controller also has a local manual control function. In an emergency, the operator can control the generator through the local operation button. The transformer control submodule adopts an intelligent tap changer controller, which automatically adjusts the tap changer position of the transformer according to the instructions of the central control unit to realize the adjustment of the transformer ratio;

[0051] Implementation of human-machine interaction interface: Install a large-screen LCD display and touch operation panel in the power plant control room, and run customized graphical user interface (GUI) software. The GUI software displays the operating parameters and status information of the power plant electrical equipment to the operator in the form of intuitive graphics and tables. The operator can perform remote control operations of the equipment through the touch operation panel, such as starting / stopping the generator, adjusting the transformer tap switch, etc. At the same time, the GUI software provides a historical data query function, and the operator can query the historical operating data of the equipment, generate reports and print them;

[0052] Implementation of communication module: The communication module adopts industrial-grade communication server, supports multiple communication protocols such as TCP / IP, UDP, Profibus, etc., and is connected with the central control unit, equipment control module and human-machine interaction interface through Ethernet interface to realize data transmission within the system. At the same time, the communication server is connected with the DCS system and SIS system of the power plant through a dedicated communication network to realize data sharing and collaborative work. In addition, the communication server also has remote communication function, which is connected with the remote monitoring center through the Internet to realize remote monitoring and management;

[0053] Implementation of the intelligent diagnosis and early warning module: The intelligent diagnosis and early warning module is integrated into the software of the central control unit. The module uses big data analysis technology to analyze historical operation data and real-time collected data, establish equipment fault diagnosis models and early warning indicator systems, and through monitoring and analysis of real-time data, when the equipment operation parameters exceed the early warning indicators, the intelligent diagnosis and early warning module automatically issues an early warning signal and generates a fault diagnosis report, indicating the fault type and maintenance suggestions;

[0054] Implementation of the expansion interface module: An expansion interface module is set up on the hardware platform of the central control unit, providing multiple USB interfaces, RS485 interfaces and Ethernet interfaces. When a new electrical device or sensor is connected, the system can automatically identify the type and parameters of the device, perform corresponding configuration and initialization, and realize rapid access to the device and expansion of the system.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power plant electrical control system, characterized in that: include: Data acquisition and transmission modules are distributed in various electrical equipment in the power plant. They use various types of sensors to collect the operating parameters of electrical equipment in real time and transmit the data to the central control unit through communication methods such as fieldbus or industrial Ethernet. The central control unit uses a high-performance industrial computer or programmable logic controller to receive real-time data from the data acquisition and transmission module, uses advanced data analysis algorithms and control strategies to process and analyze the data, establishes an operation model for electrical equipment, evaluates the equipment operation status and predicts fault trends, generates control instructions and sends them to the equipment control module, and also has data storage and management functions; Human-machine interaction interface, which uses a large-screen LCD display and a touch-type operation panel, combined with a graphical user interface design, provides operators with real-time viewing of electrical equipment operating parameters, status information, fault alarms and other functions, and supports remote control operations, historical data query, report generation and printing functions; The communication module is responsible for realizing the communication connection between each module of the system and with the external system. It adopts multiple communication protocols, supports the integration with other automation systems of the power plant, and has remote communication function; Intelligent diagnosis and early warning module, which uses big data analysis and artificial intelligence technology to conduct in-depth mining and analysis of the collected electrical equipment operation data, establish a fault diagnosis model and early warning indicator system, monitor the health status of equipment in real time, issue early warning signals, and provide fault diagnosis reports and maintenance suggestions; The expansion interface module provides a variety of standard interfaces and supports plug-and-play functions.

2. A power plant electrical control system according to claim 1, characterized in that: The sensors in the data acquisition and transmission module include current sensors, voltage sensors, temperature sensors, and vibration sensors.

3. A power plant electrical control system according to claim 1, characterized in that: The data analysis algorithm of the central control unit includes a machine learning algorithm, which is used to analyze the operating data of electrical equipment and predict fault trends.

4. A power plant electrical control system according to claim 1, characterized in that: The generator control submodule in the equipment control module controls the output voltage and frequency of the generator by adjusting the excitation current, and the transformer control submodule adjusts the transformation ratio of the transformer by controlling the tap switch.

5. A power plant electrical control system according to claim 1, characterized in that: The communication protocols adopted by the communication module include TCP / IP, UDP, and Profibus.

6. A power plant electrical control system according to claim 1, characterized in that: The human-computer interaction interface is installed in the power plant control room and runs customized graphical user interface software.

7. A power plant electrical control system according to claim 1, characterized in that: The intelligent diagnosis and early warning module is integrated into the software of the central control unit, and uses big data analysis technology to establish an equipment fault diagnosis model and an early warning indicator system.

8. The power plant electrical control system according to claim 1, characterized in that: The standard interfaces provided by the expansion interface module include USB interface, RS485 interface and Ethernet interface.

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