CN204425043U - A kind of circuit breaker on-Line Monitor Device - Google Patents

Abstract

The utility model relates to an on-line monitoring device for a circuit breaker, which comprises an optical fiber temperature measuring board, a mechanical characteristic acquisition board, an input and output board and a core board connected to each other through a CAN bus; and the mechanical characteristic acquisition board and the core board are also connected via a serial bus. All the functions are integrated in one device, so that compared with the previous products, it overcomes the shortcomings of scattered online monitoring content, requiring many devices, occupying a large space in the switch cabinet, and inconvenient wiring. At the same time, it supports communication between Ethernet, input and output modules, protection and background devices, and has high adaptability. Large amount of monitoring and high integration. And while realizing the online monitoring function, since each individual board has a separate CPU, it can be plugged and freely configured. According to customer needs, module boards can be added or reduced, so that the configuration is more flexible. Therefore, the device is suitable for popularization and use in a large area.

Description

A circuit breaker on-line monitoring device

technical field

The utility model belongs to the field of intellectualization of medium-voltage switch cabinets, and in particular relates to an on-line monitoring device for a circuit breaker.

Background technique

With the deepening of domestic smart grid construction, the medium voltage switchgear is a very important link in the power system, and its intelligence level is of great significance to the improvement of the automation degree of the whole system. In recent years, the momentum of new technological changes in the field of medium-voltage technology has been strong. The State Grid Corporation of China has put forward detailed requirements for smart devices such as information digitization, function integration, compact structure, and status visualization in the "Technical Guidelines for Smart Substations". The online monitoring content of the circuit breaker includes: ambient temperature and humidity, contact temperature, bus temperature, three-phase voltage and current values, zero-sequence current, mechanical characteristics (including circuit breaker opening and closing position, handcart position, floor knife position, It can record wave data of motor position and all position states over time), etc. The online monitoring devices currently on the market only detect the ambient temperature, circuit breaker, ground knife, energy storage motor, handcart position, ground knife position status, ambient temperature and humidity, etc., contact, bus temperature and position recording data, etc. It is collected in a separate device, and the contact and bus temperature are also integrated in the protection device.

Utility model content

The purpose of this utility model is to overcome the above-mentioned shortcomings in the prior art, and provide an online monitoring device for circuit breakers, which has the advantages of centralized line monitoring content, less devices required, less space in the switch cabinet, and convenient wiring.

In order to achieve the above object, the utility model adopts the following technical solutions: including the optical fiber temperature measuring board, the mechanical characteristic acquisition board, the input and output board and the core plate connected to each other through the CAN bus; and the mechanical characteristic acquisition board and the core The plates are also connected via a serial bus;

The optical fiber temperature measurement board is provided with a processor, the input end of the processor is connected to the output end of the optical fiber temperature measurement module and the power supply, and the output end is connected to the communication line; and the input end of the optical fiber temperature measurement module is passed through the LDC module and the DC/DC The module is connected to the power supply, and a number of optical fiber terminals are arranged on the optical fiber temperature measurement module;

A processor is arranged in the mechanical characteristic acquisition board, the input end of the processor is connected to an encoder and a plurality of current measurement modules, and the input end of the encoder is connected to a displacement sensor, and the input end of the current measurement module is connected to a sliding rheostat;

The said drive-in and drive-out board is provided with a processor, and the processor is connected with a drive-in module, a drive-out module and a communication bus; the input terminal of the drive-in module is connected to the sensor for detecting the position of the circuit breaker, the driver, the energy storage motor and the ground knife connected; the output module input is connected with the drive circuit and protection device;

The core block is provided with a processor and a communication module connected with the processor; the communication module is connected with a protection device, a temperature environment sensor, a liquid crystal panel and a background device.

The processor provided in the optical fiber temperature measuring board, the mechanical characteristic collecting board and the input and output board adopts an ARM core chip.

There are two optical fiber temperature measurement modules, and each optical fiber temperature measurement module is provided with three optical fiber terminals, and the two optical fiber temperature measurement modules are respectively a contact temperature measurement module and a bus temperature measurement module, and between them and the processor Both are connected via SPI bus.

The communication line connected to the output end of the processor in the optical fiber temperature measuring board is RS485, RS232 or CAN.

The encoders in the mechanical characteristic acquisition board are Kübler encoders, and there are four current measurement modules.

The processor arranged in the core block adopts an ARM chip.

The communication modules set in the core block include: an Ethernet communication module, a three-way RS485 communication module, a backplane CAN communication module, a backplane RS485 communication module, and an RS422 communication module.

The Ethernet communication module is connected to the background device; the three-way RS485 communication module is respectively connected to the protection device, the temperature environment sensor and the mechanical characteristic acquisition board; the backplane CAN communication module is connected to the optical fiber temperature measurement board, the mechanical characteristic acquisition board and the input and output board; the RS485 communication module on the back panel is connected to the communication device; the RS422 communication module is connected to the LCD panel.

The utility model has the following beneficial effects: compared with the prior art, the utility model includes an optical fiber temperature measuring board connected to the core board, an input and output board and a mechanical characteristic board, and integrates all functions in one device, thereby Compared with the previous products, it overcomes the shortcomings of scattered online monitoring content, requiring many devices, occupying a large space in the switch cabinet, and inconvenient wiring. At the same time, it supports communication between Ethernet, input and output modules, protection and background devices, and has high adaptability. Large amount of monitoring and high integration. And while realizing the online monitoring function, since each individual board has a separate CPU, it can realize pluggable and freely configurable functions, and module boards can be added or reduced according to customer needs, so that the configuration is more flexible. Since each module is equipped with a CPU, the burden on the CPU in the core board is greatly reduced, the signal processing speed of the device is improved, the processing cycle and time are shortened, and the efficiency is improved. Therefore, the device is suitable for popularization and use in a large area.

Further, since the processors provided in the optical fiber temperature measuring board, the mechanical characteristic collecting board and the input and output board are ARM chips, the cost of the device is further reduced.

Description of drawings

Fig. 1 is the structural representation of this device;

Figure 2 is a block diagram of the optical fiber temperature measuring board;

Fig. 3 is a schematic block diagram of the mechanical characteristic acquisition board;

Figure 4 is a block diagram of the core board;

Figure 5 is a schematic block diagram of the input and output board.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Referring to Figures 1-5, the utility model includes an optical fiber temperature measuring board, a mechanical characteristic acquisition board, an input and output board and a core board connected to each other via a CAN bus; The optical fiber temperature measurement board is connected with a serial bus; a processor is arranged in the optical fiber temperature measurement board, the input end of the processor is connected to the output end of the optical fiber temperature measurement module and the power supply, and the output end is connected to the communication line; and the input end of the optical fiber temperature measurement module is passed through the LDC module and The DC/DC module is connected to the power supply, and a number of optical fiber terminals are arranged on the fiber optic temperature measurement module; a processor is arranged in the mechanical characteristic acquisition board, and the input end of the processor is connected to the encoder and several current measurement modules, and the input end of the encoder Connect the displacement sensor, the input end of the current measurement module is connected with the sliding rheostat; the input and output board is provided with a processor, and the processor is connected with the input module, the output module and the communication bus; the input end of the input module is connected with the detection circuit breaker, driver , the energy storage motor is connected with the sensor of the ground knife position; the input terminal of the output module is connected with the drive circuit and the protection device; a processor and a communication module connected with the processor are arranged in the core board; the communication module is connected There are protection devices, temperature environment sensors, LCD panels and background devices. An optical fiber temperature measurement board, a mechanical characteristic acquisition board and a processor ARM chip set in the input and output board. There are two optical fiber temperature measurement modules, and each optical fiber temperature measurement module is equipped with three optical fiber terminals. bus connection. The communication line connected to the output end of the processor in the optical fiber temperature measuring board is RS485, RS232 or CAN. The encoder in the mechanical characteristic acquisition board is a Kübler encoder, and there are four current measurement modules. The processor ARM chip set in the core block. The communication modules set in the core block include: Ethernet communication module, three-way RS485 communication module, backplane CAN communication module, backplane RS485 communication module, RS422 communication module. The Ethernet communication module is connected to the background device; the three-way RS485 communication module is respectively connected to the protection device, the temperature environment sensor and the mechanical characteristic acquisition board; the backplane CAN communication module is connected to the optical fiber temperature measurement board, the mechanical characteristic acquisition board and the input and output The board RS485 communication module is connected to the communication device; the RS422 communication module is connected to the LCD panel.

The functions are realized by sub-modules, and the boards are divided into: 1. The temperature measuring board is used to measure the temperature of the bus board and the contact temperature of the circuit breaker. This is achieved by using an optical fiber temperature measurement board. 2. Mechanical characteristic acquisition module: collect wave recording data of circuit breakers, handcarts, floor knives, and energy storage motors changing with time, and use the mechanical characteristic acquisition board to realize. 3. Drive in and out board: obtain the position information of the circuit breaker, handcart, ground knife, and energy storage motor through the input value. 4. The liquid crystal display board communicates with the main core board through RS422 communication, and displays the switching value information, the position of the circuit breaker, handcart, ground knife, and energy storage motor. 5. Main core board: Receive the temperature data of the temperature measuring board and the position information of the input and output boards through the backplane CAN bus, transmit the mechanical characteristic data packet of the mechanical characteristic acquisition board through the backplane RS485, and pass the temperature and humidity through the RS485 interface. The collector collects environmental temperature and humidity data, and sends them to the host computer through Ethernet after summarization, and communicates with the protection device through RS485, and can realize mutual operation and logic interlocking with the protection device through the input and output boards.

The optical fiber temperature measurement board applies the existing optical fiber temperature measurement module in the market, which consists of a DC/DC boost module, a low dropout linear voltage regulator, a CPU processing module, an RS485 communication module, an RS232 communication module, a serial communication module and two light measurement Composed of temperature modules, the main CPU uses a low-cost ARM chip. During the specific operation process, the CPU module reads the 6-channel optical fiber data of the optical fiber temperature measurement module through SPI communication, and performs logical judgment and protection function realization according to the sampled data, and then sends the data from the backplane to the CPU through CAN communication module. The SPI communication is used to connect with the CPU, and the CPU uses an ARM chip. Among them, the optical temperature measurement acquisition device can use two optical temperature measurement modules, and control and collect the communication of the two optical fiber temperature measurement modules through SPI chip selection and clock, and transmit the data to the CPU board through CAN communication.

The mechanical characteristic acquisition board applies the existing Kübler encoders in the market, and is composed of Kübler encoders, small current monitoring modules, CPU processing modules, RS485 communication modules, RS232 communication modules, RS422 communication modules and serial port communication modules. The CPU uses a low-cost ARM chip. During the specific operation process, the CPU module reads the displacement data of the circuit breaker measured by the Kübler encoder and the displacement data of the handcart, ground knife and energy storage motor measured by the small current monitoring module through RS422 communication, and according to the sampled The data is stored as data recording data, and then the data is sent to the CPU module through the RS485 communication port. It is connected with the CPU through RS422 communication. The CPU uses a low-cost ARM chip. The Kübler encoder uses a module to collect the displacement information of the circuit breaker. The position information of the handcart, ground knife and energy storage motor is given by adding a constant voltage. Sliding rheostats are installed at the handcart, ground knife and energy storage motor, and the displacement information is obtained through the feedback current. All data packets are transmitted from the backplane to the CPU board through RS485.

The input and output board is composed of input module, output module, CPU processing module, RS485 communication module, RS232 communication module and serial communication module. The main CPU adopts low-cost ARM chip. During the specific operation process, the CPU module reads the position status of the circuit breaker, handcart, ground knife, and energy storage motor through the input module, and sends the data to the core board through CAN communication. Read the control command of the core board through CPU communication, and send it to the output module to control the circuit breaker, handcart, ground knife, energy storage motor, etc. Also use the low-cost ARM chip CPU to control the relay and detect the binary input information, feedback the input information to the CPU board through CAN communication, and the CPU board can also control the relay output through CAN communication.

The core board is composed of CPU processing module, Ethernet communication module, RS485 communication module, RS232 communication module, RS422 communication module and serial port communication module, and the main CPU adopts ARM chip. During the specific operation process, the CPU module reads the mechanical characteristic recording data from the mechanical characteristic acquisition board through RS485, reads the temperature data through CAN communication, reads the ambient temperature and humidity data of the ambient temperature and humidity temperature measurement module through the RS485 port, and passes CAN communication reads the position status of the circuit breaker, handcart, ground knife, and energy storage motor, and transmits the data to the LCD panel for display through RS422 communication, and communicates with the protection device through RS485, and communicates with the background device through Ethernet. Using ARM CPU chip, it supports Ethernet communication, three-way RS485 communication, backplane CAN communication, backplane RS485 communication, RS422 communication, and supports LCD screen to display all switching information.

The utility model uses and integrates the content of optical fiber temperature measurement, environmental temperature and humidity monitoring, mechanical characteristic monitoring and mechanical position information monitoring, and has large monitoring amount and high integration degree.

Furthermore, the optical fiber temperature measurement data and mechanical position information are transmitted to the core board through CAN communication. Due to the large amount of data, the mechanical characteristic monitoring data and environmental temperature and humidity monitoring data are compressed into data packets through RS485 and sent to the core board. After all the data are integrated, they can be It can be displayed on the LCD panel, can also be transmitted to the protection device through RS485 communication, and can also be transmitted to the background display through Ethernet. This is more convenient and convenient to display.

Furthermore, while realizing the online monitoring function, each individual board has a separate CPU, so as to realize the function of pluggable and free configuration, and module boards can be added or reduced according to customer needs, so that the configuration is more flexible.

The processor installed in the optical fiber temperature measurement board, mechanical characteristic acquisition board and input and output board adopts the ARM core chip of model NXP-LPC1752FBD80. The ARM chip model adopted by the processor set in the core block is AT91RM9200. Since the processors arranged in the optical fiber temperature measuring board, the mechanical characteristic collecting board and the input and output board are ARM chips, the cost of the device is further reduced.

Claims (8)

1. a circuit breaker on-Line Monitor Device, is characterized in that: comprise the optical fiber temperature-measurement plate, mechanical property collection plate, input and output plate and the core plate that are connected through CAN each other; And be also connected through universal serial bus between mechanical property collection plate and core plate;

Processor is provided with, the output of the input connecting fiber temperature measurement module of processor and power supply, output connecting communication circuit in described optical fiber temperature-measurement plate; And the input of optical fiber temperature-measurement module is connected with power supply with DC/DC module through LDC module, optical fiber temperature-measurement module is provided with some optic fibre connectors;

Be provided with processor in described mechanical property collection plate, the input of processor connects encoder and some current measurement modules, and encoder input connection bit displacement sensor, current measurement module input connects slide rheostat;

Be provided with processor in described input and output plate, processor is connected with to be left into module, outputs module and communication bus; Open and be connected with the transducer of ground cutter position with detection circuit breaker, driver, energy storage motor into module input; Output module input to be connected with protective device with drive circuit;

The communication module being provided with processor in described core plate and being connected with processor; Described communication module is connected with protective device, temperature environment transducer, liquid crystal panel and background apparatus.

2. a kind of circuit breaker on-Line Monitor Device according to claim 1, is characterized in that: the processor arranged in described optical fiber temperature-measurement plate, mechanical property collection plate and input and output plate adopts ARM core chip.

3. a kind of circuit breaker on-Line Monitor Device according to claim 1, it is characterized in that: described optical fiber temperature-measurement module is two, each optical fiber temperature-measurement module is provided with three optic fibre connectors, two optical fiber temperature-measurement modules are respectively contact temperature measurement module and bus temperature measurement module, and are all connected through spi bus between its with processor.

4. a kind of circuit breaker on-Line Monitor Device according to claim 1, is characterized in that: the communication line be connected with processor output in described optical fiber temperature-measurement plate is RS485, RS232 or CAN.

5. a kind of circuit breaker on-Line Monitor Device according to claim 1, it is characterized in that: the encoder in described mechanical property collection plate is Ku Baile encoder, current measurement module is four.

6. a kind of circuit breaker on-Line Monitor Device according to claim 1, is characterized in that: the processor arranged in described core plate adopts ARM chip.

7. a kind of circuit breaker on-Line Monitor Device according to claim 1, is characterized in that: the communication module arranged in described core plate comprises: ethernet communication module, three road RS485 communication modules, backboard CAN communication module, backboard RS485 communication module, RS422 communication module.

8. a kind of circuit breaker on-Line Monitor Device according to claim 7, is characterized in that: described ethernet communication model calling background apparatus; Three road RS485 communication modules connect protective device, temperature environment transducer and mechanical property collection plate respectively; Backboard CAN communication model calling optical fiber temperature-measurement plate, mechanical property collection plate and input and output plate; Backboard RS485 communication module connecting communication device; RS422 communication module connecting fluid crystal panel.