Digital intelligent operation control system of switch cabinet

Abstract

The utility model discloses a digital intelligent operation control system of a switch cabinet, an information acquisition module and an intelligent control terminal are installed in an instrument room of the switch cabinet, the information acquisition module is connected with a voltage transformer and a current transformer in the switch cabinet through cables, and data of a primary element of the switch cabinet is acquired, analyzed and processed. And the information acquisition module converts the analyzed and processed data information into a digital signal and transmits the digital signal to the intelligent control terminal. According to the digital intelligent switch cabinet operation control device of the utility model, the digital technology, the Internet of Things, the intelligent sensing technology and the network communication technology are adopted, and the traditional secondary control technology is integrated, and therefore, the digitization and intellectualization of a high-voltage switch cabinet can be realized.

Description

Technical Field

[0001] The utility model relates to a high-voltage switch device of an electric power system, and in particular to an integrated digital intelligent switch cabinet operation and control system. Background Art

[0002] Medium and high voltage switchgear is an important electrical equipment in the power transmission and distribution system of an enterprise. During the long-term operation of switchgear, insulation failure, mechanical failure, and heating failure may occur. If these failures are not repaired in time, they will often cause the switch to refuse to operate or malfunction, which will amplify the failure and lead to large-scale power outages. Heating failures will often cause equipment to burn, and even "burn the entire camp" to cause huge accidents and cause huge losses.

[0003] In response to the problems that arise during the operation of medium and high voltage switches, the traditional intelligent design is a decentralized design with online temperature monitoring, online mechanical status monitoring, electric chassis vehicle control, and comprehensive protection devices;

[0004] For example, the public document with publication number CN203534626U, publication date April 9, 2014, and patent name "A switch cabinet comprehensive state online monitoring device" discloses a switch cabinet comprehensive state online monitoring device having a control unit and a switch cabinet comprehensive state display device connected to the control unit, and also includes the following modules connected to the control unit: contact temperature measurement module; cable temperature measurement module; power quality monitoring module; electric chassis vehicle control module; circuit breaker state monitoring module; cabinet temperature and humidity monitoring module; switch cabinet intelligent control device, etc. Each module is connected to the control unit, and the control unit is connected to the switch cabinet comprehensive state display device by wireless and / or wired.

[0005] Such a design requires the installation of multiple control devices on the switch cabinet to monitor the health status of the cabinet and circuit breaker operation. Utility Model Content

[0006] The technical problem to be solved by the utility model is to realize a switch cabinet operation and control system which integrates the functions of temperature monitoring of switch cabinet circuit breakers, mechanical status monitoring of vacuum circuit breakers, electric chassis vehicles, electric earthing switches, etc., and can monitor the healthy status of the operation of switch cabinets and circuit breakers in real time.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a digital operation and control system of a switch cabinet, wherein an information acquisition module and an intelligent control terminal are installed in the instrument room of the switch cabinet, and the information acquisition module is connected to the voltage transformer and the current transformer in the switch cabinet through a cable, and the data of the primary components of the switch cabinet are collected, analyzed and processed. The information acquisition module converts the analyzed and processed data information into a digital signal and transmits it to the intelligent control terminal.

[0008] The information acquisition module is provided with three independent acquisition modules, namely, a measurement current acquisition module, a voltage acquisition module, a protection current acquisition module, and an information acquisition module. Each of the acquisition modules independently collects the data information it is responsible for. The input port of each of the acquisition modules is an analog signal interface, and the output port of each of the acquisition modules is a network port, and the data information is transmitted to the intelligent control terminal in the form of a digital signal through the network port.

[0009] The primary components include a current transformer, a voltage transformer, a lightning arrester, and a live indicator.

[0010] The instrument room is a cavity embedded in the switch cabinet. An inspection door is provided outside the instrument room. A human-machine interface that communicates with the intelligent control terminal is fixed on the outer side of the inspection door. The human-machine interface displays the data information collected, analyzed and processed by the information collection module.

[0011] The intelligent control terminal is connected to the temperature sensor in the switch cabinet through a signal line, and the wired temperature rise unit of the digital operation and control terminal converts the temperature signal in real time and transmits it to the human-machine interface for display.

[0012] The temperature sensors include a moving contact optical fiber temperature sensor, a busbar temperature sensor, and a cable temperature sensor.

[0013] The intelligent control terminal is connected to the control terminals of the vacuum circuit breaker, the electric earthing switch and the electric chassis in the switch cabinet through signal lines, and the intelligent control terminal sends control signals to the vacuum circuit breaker, the electric earthing switch and the electric chassis.

[0014] A power module is provided in the switch cabinet, the input end of the power module is connected to a 220V power supply, and the output end is connected to the power port for the protection and monitoring unit and the communication unit. The power module converts the voltage into 24V DC to supply power to the protection and monitoring unit and the communication unit.

[0015] This new digital switch cabinet operation and control device uses digital technology, Internet of Things, intelligent sensing and network communication technology, integrates traditional secondary control technology, and realizes the digitization and intelligence of high-voltage switch cabinets. It has "one-button sequential control" and intelligent operation and maintenance functions; real-time monitoring of operation data, rapid fault self-diagnosis function; real-time monitoring of core component operation data, and assists users in energy efficiency management; it improves service value for customers in terms of safety, reliability, intelligence and operation efficiency, and is the preferred solution for intelligent switch complete sets of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following is a brief description of the contents expressed in each figure in the utility model specification and the marks in the figure:

[0017] Figure 1Install the operation and control system structure diagram for the digital switchgear;

[0018] Figure 2 Schematic diagram of the information collector

[0019] The marks in the above figures are: 1. Human-machine interface, 2. Intelligent control terminal, 3. Information acquisition module, 4. Moving contact optical fiber temperature sensor, 5. Busbar temperature sensor, 6. Cable temperature sensor; 7. Electric chassis vehicle; 8. Electric earthing switch; 9. Vacuum circuit breaker. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation methods of the present invention, such as the shapes and structures of the components involved, the relative positions and connection relationships between the components, the functions and working principles of the components, the manufacturing process and the operation and use methods, etc., through the description of the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0021] Integrated digital switchgear operation and control system Figure 1 As shown, it consists of a human-machine interface 1, a digital operation and control terminal, a data acquisition module, a moving contact optical fiber temperature sensor 4, a busbar temperature sensor 5, and a cable temperature sensor 6. The entire system integrates temperature monitoring of switch cabinet circuit breakers, mechanical status monitoring of vacuum circuit breakers 9, electric chassis vehicles 7, electric earthing switches 8 and other functions to monitor the health status of switch cabinets and circuit breakers in real time.

[0022] The digital intelligent operation and control system of the switch cabinet is provided with an inwardly recessed instrument room on the outer side of the switch cabinet, and an inspection door is provided outside the instrument room. One side of the inspection door is hinged to the side of the instrument room, and a door lock is provided between the other side of the inspection door and the frame of the instrument room. A human-machine interface 1 communicating with the intelligent control terminal 2 is fixed on the outer side of the inspection door, and the information collection module 3 and the intelligent control terminal 2 are both installed in the instrument room. The human-machine interface 1 preferably adopts a 10.1-inch touch LCD large screen, which is easy to operate, has a clear display, password protection, and a long screen saver setting life.

[0023] The digital operation and control terminal is the core unit of the digital operation and control system, which performs digital real-time analysis and processing on the information collected by each intelligent module and sensor; it is equipped with a microcomputer protection system and a sampling terminal, which performs digital real-time analysis and processing on the information collected by each information collection module 3 (such as measuring current, protection current, voltage module, etc.) and each sensor (wired temperature rise, live indication), and obtains the operating status parameter information of the switch cabinet (temperature information, circuit breaker characteristic parameters, etc.) and transmits it to the human-machine interface 1 for real-time display. Such as the operating temperature of the circuit breaker moving contact and busbar, electric energy parameters, circuit breaker characteristic parameters such as opening and closing time and current, trolley and grounding switch motor operating time and current, etc. The digital operation and control terminal has a remote communication function.

[0024] The information acquisition module 3 includes a measurement current acquisition module, a voltage acquisition module, and a protection current acquisition module, which are connected to the voltage transformer and the current transformer through cables, collect and analyze the data of the primary components of the switch cabinet, such as the temperature sensor, current transformer, voltage transformer, and live display, and convert them into digital signals, and transmit them to the intelligent control terminal. Using the Internet of Things, digitalization, and bus technology, data transmission is fast, reliable, safe, and energy-saving.

[0025] The temperature signals collected by the moving contact optical fiber temperature sensor 4, the busbar temperature sensor 5, and the cable temperature sensor 6 are output to the digital operation and control terminal (wired temperature rise unit) and converted into temperature information in real time and displayed on the human-machine interface 1.

[0026] The process of switch status monitoring of the integrated digital switchgear operation and control system is as follows:

[0027] The 220V power supply is electrically connected to the power module, which converts the voltage into 24V DC to supply power to the protection and monitoring unit and the communication unit. The current transformer converts the large current into a small current, and the voltage transformer converts the high voltage into a low voltage. It can control the energy storage closing and opening operations of the vacuum circuit breaker 9 in real time, and when a voltage or current fault occurs, the digital operation and control terminal can sense it and open the circuit breaker, and transmit the information to the human-machine interface 1.

[0028] The control terminals of components such as the vacuum circuit breaker 9, the electric earthing switch 8, and the electric chassis 7 are connected to the corresponding terminals of the digital operation and control terminal, and the collected signals are transmitted to the digital operation and control terminal at the same time, which can realize the energy storage and closing and opening operations of the vacuum circuit breaker 9, the swing-in and swing-out operations of the electric chassis 7, and the closing and opening operations of the electric earthing switch 8. At the same time, the mechanical state parameters of the vacuum circuit breaker 9 such as energy storage time, closing and opening speed, closing and opening current and other parameters are monitored in real time; the temperature signals collected by the optical fiber temperature sensor, the busbar temperature sensor 5, and the cable temperature sensor 6 It is transmitted to the digital operation and control terminal in real time, and the contact temperature of the circuit breaker, the busbar of the switch cabinet, the cable temperature and other information are transmitted to the human-machine interface 1 through digital processing of the digital cloud terminal; the optical fiber temperature sensor is a fluorescent type, using special optical fiber. The optical fiber is both a sensor and a signal transmission carrier. The optical fiber sensor probe is buried in the contact arm of the intelligent circuit breaker, and the collected temperature signal is transmitted to the digital operation and control terminal; the busbar temperature sensor 5 and the cable temperature sensor 6 are strap-bound type, which measure the surface temperature of the live object and transmit the temperature signal to the digital operation and control terminal for reception through the wireless network.

[0029] The monitored status of the vacuum circuit breaker 9 mechanism, the received and sensed temperature signal, and the temperature display of the switch cabinet busbar cable can also be communicated with the outside world through the communication module; through the connection of the voltage transformer, current transformer and the sampling terminal of the digital operation and control terminal, the circuit breaker is protected by short circuit tripping and other protections, and the switch cabinet operation status and circuit breaker status monitoring are realized through the signal acquisition module. It has intelligent protection, control loop, and status monitoring, reduces electrical connections, and integrates digital transmission of electrical components, and monitors the health status of the switch cabinet and circuit breaker in real time.

[0030] The utility model operation and control system is an integrated digital switch cabinet operation and control system, which integrates the temperature monitoring of the switch cabinet circuit breaker, the mechanical status monitoring of the vacuum circuit breaker 9, the electric chassis vehicle 7, the electric earthing switch 8 and other functions to monitor the health status of the switch cabinet and the circuit breaker in real time, and has the characteristics of high voltage resistance, anti-electromagnetic interference, fast response, high precision, easy installation and maintenance, and long service life.

[0031] The integrated digital switchgear operation and control system, intelligent circuit breakers, electric earthing switches 8 and other components form an intelligent switchgear, which integrates comprehensive protection, power measurement, circuit breaker control, electric trolley control, electric earthing switch 8 control, switch status simulation display, circuit breaker moving contact and busbar online temperature measurement, remote / local control, and network communication functions. It has "one-button sequential control" and intelligent operation and maintenance functions; real-time monitoring of operation data and rapid fault self-diagnosis function; it can monitor the switchgear operation power parameters, contact operation temperature rise, circuit breaker operation characteristic parameters such as opening and closing time and current, trolley and earthing switch motor operation time and current and other parameters online. Real-time monitoring of operation data and rapid fault self-diagnosis function; real-time monitoring of core component operation data to help users manage energy efficiency; improve service value for customers in terms of safety, reliability, intelligence and operation efficiency.

[0032] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A digital intelligent operation and control system for a switch cabinet, characterized in that: An information acquisition module and an intelligent control terminal are installed in the instrument room of the switch cabinet. The information acquisition module is connected to the voltage transformer and the current transformer in the switch cabinet through cables to collect, analyze and process the data of the primary components of the switch cabinet. The information acquisition module converts the analyzed and processed data into digital signals and transmits them to the intelligent control terminal.

2. The digital intelligent operation and control system of the switch cabinet according to claim 1 is characterized in that: The information acquisition module is provided with three independent acquisition modules, namely, a measurement current acquisition module, a voltage acquisition module, a protection current acquisition module, and an information acquisition module. Each of the acquisition modules independently collects the data information it is responsible for. The input port of each of the acquisition modules is an analog signal interface, and the output port of each of the acquisition modules is a network port, and the data information is transmitted to the intelligent control terminal in the form of a digital signal through the network port.

3. The digital intelligent operation and control system of the switch cabinet according to claim 2 is characterized in that: The primary components include a current transformer, a voltage transformer, a lightning arrester, and a live indicator.

4. The digital intelligent operation and control system of the switch cabinet according to claim 1, 2 or 3, characterized in that: The instrument room is a cavity embedded in the switch cabinet. An inspection door is provided outside the instrument room. A human-machine interface that communicates with the intelligent control terminal is fixed on the outer side of the inspection door. The human-machine interface displays the data information collected, analyzed and processed by the information collection module.

5. The digital intelligent operation and control system of the switch cabinet according to claim 4 is characterized in that: The intelligent control terminal is connected to the temperature sensor in the switch cabinet through a signal line, and the wired temperature rise unit of the intelligent control terminal converts the temperature signal in real time and transmits it to the human-machine interface for display.

6. The digital intelligent operation and control system of the switch cabinet according to claim 5 is characterized in that: The temperature sensors include a moving contact optical fiber temperature sensor, a busbar temperature sensor, and a cable temperature sensor.

7. The digital intelligent operation and control system of the switch cabinet according to claim 6 is characterized in that: The intelligent control terminal is connected to the control terminals of the vacuum circuit breaker, the electric earthing switch and the electric chassis in the switch cabinet through signal lines, and the intelligent control terminal sends control signals to the vacuum circuit breaker, the electric earthing switch and the electric chassis.

8. The digital intelligent operation and control system of the switch cabinet according to claim 1 or 7, characterized in that: A power module is provided in the switch cabinet, the input end of the power module is connected to a 220V power supply, and the output end is connected to the power port for the protection and monitoring unit and the communication unit. The power module converts the voltage into 24V DC to supply power to the protection and monitoring unit and the communication unit.

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