CN211626718U - Passive wireless switchgear temperature monitoring equipment of cubical switchboard - Google Patents

Passive wireless switchgear temperature monitoring equipment of cubical switchboard Download PDF

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Publication number
CN211626718U
CN211626718U CN201922462413.2U CN201922462413U CN211626718U CN 211626718 U CN211626718 U CN 211626718U CN 201922462413 U CN201922462413 U CN 201922462413U CN 211626718 U CN211626718 U CN 211626718U
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China
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temperature
wireless
temperature sensor
switchgear
module
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CN201922462413.2U
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赵东辉
程若瑶
张慧
王鹤凡
赵家萱
时存
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Henan University
Zhengzhou Electric Power College
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Henan University
Zhengzhou Electric Power College
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Abstract

The utility model discloses a passive wireless switchgear temperature monitoring equipment of cubical switchboard, including at least one be used for carrying out the first temperature sensor of temperature acquisition to the female row in the cubical switchboard, at least one be used for carrying out the second temperature sensor of temperature acquisition and at least one third temperature sensor that is used for carrying out the temperature acquisition to outdoor switch temperature to the circuit breaker moving contact in the cubical switchboard, three temperature sensor corresponds a relay module respectively and carries out wireless communication connection, relay module carries out the connection with backstage monitored control system or remote monitering system through wireless communication mode after the network deployment; the utility model provides a current adoption artifical handheld thermal imaging system or contact temperature sensor are difficult to realize the female row of cubical switchboard inside, hide in the inside sound contact of circuit breaker housing and set up the switch temperature on outdoor transmission tower conveniently and accurately monitor.

Description

Passive wireless switchgear temperature monitoring equipment of cubical switchboard
The technical field is as follows:
the utility model relates to a power equipment operation monitoring technology field especially relates to a passive wireless switchgear temperature monitoring equipment of cubical switchboard.
Background art:
with the development of smart grids, obtaining the state information of electrical equipment in real time is very critical in the intelligent construction of power systems. The high-voltage switch cabinet is one of important equipment of a power system, and the fact that the high-voltage switch cabinet cannot operate reliably is a very critical factor in safe production and reliable operation of electric power of a transformer substation. A plurality of scattered parts such as circuit breakers, buses, incoming and outgoing lines and the like are arranged in the switch cabinet. Because the internal space of the switch cabinet is compact due to volume limitation, the current of the switch cabinet is generally larger as the medium of an incoming line and an outgoing line, and the high current often causes the overhigh temperature rise of switch cabinet parts, accelerates the aging of insulation and generates safe printing. Most of high-voltage switch cabinets of the existing 10kV transformer substations are of a KYN type, the overheating parts of the high-voltage switch cabinets mainly occur on contacts of trolley circuit breakers in the cabinets, due to the fact that operating conditions are worsened, contact resistance is increased, when large current flows through, the temperature rise of the contacts can be too fast and even can be burnt out, and overheating can possibly influence the safety of the switch cabinets and even the operation of the whole power grid. The method is specifically provided in article 11.7.2 of eighteen major grid accident countermeasures of the national grid company: the parts in the substation switch cabinet are regularly checked by infrared temperature measuring equipment, particularly important parts such as a contact, an outlet base and the like, and frequent detection is needed to prevent dangerous accidents. However, the switch cabinet is totally enclosed during operation, internal and heavy current is generated, the operation and inspection personnel are difficult to obtain the switch cabinet temperature data, and the circuit breaker contact is positioned in the insulating layer and cannot directly measure the temperature data, so that a set of reliable temperature sensor is very necessary to design.
The main means of the temperature measurement of the power equipment in the existing switch cabinet are as follows: firstly, sticking a temperature measuring wax sheet; measuring the temperature of the handheld thermal infrared imager; measuring the temperature of the handheld infrared point temperature instrument; fourthly, measuring the temperature by a contact type digital sensor; and fifthly, measuring the temperature by using the optical fiber surface mount. The former 3 methods all need manual participation to monitor the equipment, so that missing report and false report are easy to occur, long-time measurement cannot be performed, the monitoring accuracy is different due to different personnel operation, and the real-time performance is poor. The method can realize on-line monitoring, but the sensors are mounted in a binding mode, a self-tapping screw mode, a penetrating type screw mode, a buckling mode and the like, so that the structure of primary equipment can be damaged, the insulating property and the operation of the equipment can be influenced, and the safety is reduced; the most serious is that once the temperature measuring system fails, the power supply reliability of the system is reduced. The method shortens creepage distance, and has complex installation and debugging, high cost and is not beneficial to large-area popularization. On the other hand, the communication of the temperature acquisition system is very important, the 3 temperature measurement methods are not provided with a digital communication system, the last 2 methods are all in a wired communication mode, the wiring redundancy in the switch cabinet can be caused, and if the surface of the communication line is infected with dirt, the creepage distance can be shortened, and the insulation distance and the operation safety of the power equipment are influenced.
And above-mentioned detection mode adopts wired sensor or active wireless sensor, and the cable of wired sensor needs specially to be fixed in cabinet body inside, can shorten creepage distance, and the battery that needs to assemble certain capacity when active wireless sensor uses comes to supply power for the sensor, and its sensor volume is generally great, can't install in narrow and small space.
The utility model has the following contents:
the utility model discloses the technical problem that will solve is: the temperature monitoring device overcomes the defects of the prior art, and solves the problem that the conventional manual handheld thermal imager or contact type temperature sensor is difficult to realize the temperature monitoring device of the switch cabinet passive wireless switch device, which is used for conveniently and accurately monitoring the internal busbar of the switch cabinet, the dynamic and static contacts deeply hidden in the shell of the circuit breaker and the temperature of the disconnecting link arranged on an outdoor transmission tower.
The technical scheme of the utility model is that: the utility model provides a passive wireless switchgear temperature monitoring equipment of cubical switchboard, characterized by: the temperature acquisition device comprises at least one first temperature sensor used for acquiring the temperature of a busbar in a switch cabinet, at least one second temperature sensor used for acquiring the temperature of a moving contact of a circuit breaker in the switch cabinet and at least one third temperature sensor used for acquiring the temperature of an outdoor disconnecting link, wherein the three temperature sensors are respectively connected with a relay module in a wireless communication mode, the relay module is connected with a background monitoring system or a remote monitoring system in a wireless communication mode after being self-organized, the relay module comprises a wireless module, an encryption module, a clock chip RTC, a memory and a core processor MCU, and the temperature sensors are respectively sleeved on the busbar in the switch cabinet, on a contact finger of the circuit breaker in the switch cabinet and on the outdoor disconnecting link.
Furthermore, the temperature sensor adopts a CT-T200 self-powered wireless temperature sensor produced by Xiann finished electrified gas equipment Limited, and the wireless module adopts a wireless transceiving antenna produced by Shenzhen Shanghai Hua Ke technology development Limited, and the model number of the wireless transceiving antenna is 3G GSM PHS ANTENNA.
Further, the clock chip RTC is used for providing accurate system time, and an internal interface of the RTC is a serial interface.
Further, the memory is an internal memory chip for storing the data collected by the temperature sensor, and an internal interface of the internal memory chip is a serial interface.
Further, the encryption module is a chip or a functional module supporting an encryption algorithm including SM2, SM1, RSA, AES, DES, and 3DES, and the core processor MCU transmits data to the encryption module through a serial interface.
The utility model has the advantages that:
1. the utility model discloses a wireless temperature sensor suit with from power-taking function is on female arranging, circuit breaker internal contact finger and outdoor switch, solves and adopts artifical handheld thermal imager or contact temperature sensor to be difficult to realize the female arranging of cubical switchboard inside, hide deeply at the inside sound contact of circuit breaker shell and set up the switch temperature on outdoor transmission tower and carry out conveniently and monitor accurately at present.
2. The utility model adopts the wireless temperature sensor with the self-power-taking function, can be installed at a position with a narrow space, does not need a connecting cable, and is convenient to install and operate; and need not use the battery to supply power, avoid the later maintenance, simultaneously, whole equipment need not carry out the structural transformation to the cubical switchboard, only need the suit on check out test set, is applicable to the upgrading to old cubical switchboard to showing reduce cost, requiring little to the environment, therefore can work under the ambient temperature scope of broad.
3. The utility model discloses simple structure, the space that occupies is little, the operation is reliable and stable, can realize effectively having solved the unable real-time online temperature measurement that generates heat in all kinds of narrow and small space of current artifical temperature measurement to the power equipment such as female arranging in the cubical switchboard and circuit breaker moving contact and outdoor switch wait, and the temperature measurement is not comprehensive, omits the difficult problem that does not target in place, and receive and release the convenience, the assistance personnel who needs are few, be applicable to and expand the use anytime and anywhere under topography and the weather of difference.
Description of the drawings:
fig. 1 is a block diagram of a temperature monitoring device of a switch cabinet passive wireless switch device.
Fig. 2 is a block diagram of a relay module.
The specific implementation mode is as follows:
example (b): see fig. 1 and 2.
The temperature monitoring equipment of the switch cabinet passive wireless switch equipment comprises at least one first temperature sensor for collecting the temperature of a busbar in the switch cabinet, at least one second temperature sensor for collecting the temperature of a breaker moving contact in the switch cabinet and at least one third temperature sensor for collecting the temperature of an outdoor disconnecting link, wherein the three temperature sensors are in wireless communication connection with a relay module respectively, and the relay module is connected with a background monitoring system or a remote monitoring system in a wireless communication mode after being subjected to ad hoc networking; the problem that the temperature of a busbar in a switch cabinet, a moving contact and a static contact hidden in a shell of a circuit breaker and a disconnecting link arranged on an outdoor transmission tower is difficult to monitor conveniently and accurately by adopting a manual handheld thermal imager or a contact type temperature sensor is solved.
The present application will be described in detail below with reference to the drawings and examples.
The background monitoring system is provided with monitoring software so that a worker can conveniently monitor the temperature of the electrical equipment distributed in different areas, and the monitoring software adopts a C/S response mode to realize the functions of real-time online monitoring of the temperature, historical data query of the temperature, temperature rise alarm and the like; the remote monitoring system carries out centralized monitoring and management on each background monitoring system at a far end.
The temperature sensor adopts a CT-T200 self-powered wireless temperature sensor produced by Xian integrated electrical equipment Limited, has self-powered and wireless communication functions, and has the advantages of small volume and no need of power supply. The temperature sensors are respectively sleeved on a busbar in the switch cabinet, a contact finger of a circuit breaker in the switch cabinet and an outdoor knife switch.
And the MCU core processor is responsible for overall operation and scheduling of the whole real-time monitoring equipment.
The core processor MCU sends the data to the encryption module through the serial interface, and the encryption module is used for verifying and encrypting the data so as to ensure the safety of a communication link. The encryption module is a chip or a functional module supporting mainstream encryption algorithms, and the module supports, but is not limited to, encryption algorithms such as SM2, SM1, RSA, AES, DES, and 3 DES.
The wireless module is a module with a wireless ad hoc network and is used for receiving the encrypted data and sending the encrypted data to an upper system through time-sharing transmission of the wireless ad hoc network. The wireless ad hoc network is a Zigbee network or a LoRa network. The wireless transceiving antenna is produced by Shenzhen Huake technology development Limited, and has the model number of 3GGSM PHS ANTENNA.
And the clock chip RTC is used for providing accurate system time for the relay module and is communicated with the MCU through a serial interface.
And the memory is an internal memory chip and is used for storing the data acquired by the ultrahigh frequency passive tag, and an internal interface of the memory is a serial interface, so that the memory and the MCU perform serial communication.
The time-sharing transmission principle of the wireless ad hoc network is as follows: in the whole wireless ad hoc network, the upper-layer system carries out unified time service on all the node equipment in a broadcast time correction mode. All node devices save the time in their RTC chips. Each node device can only transmit data during a particular time window. The time window of each node device is different and needs to be calculated according to its own network ID (unique identification of all devices in the ad hoc network). The starting time of the time window is calculated as:
start time is time reference + network ID time window length.
Wherein the time reference and the time window length are global parameters within the network. All device global parameters within the network are consistent. For example: assuming that the time reference is 0 minutes and 0 seconds and the time window length is 5 seconds, the transmission start time of the node device with the network ID of 10 is: 0 min 0 sec +10 × 5 ═ 0 min 50 sec. The time reference can also be changed into a dynamic variable parameter through a specific calculation method so as to improve the frequency of data transmission of the nodes and improve the real-time performance of the system. Therefore, time-sharing transmission of each node device in the network can be realized, communication conflict is reduced to the maximum extent, and accordingly network stability and communication efficiency are improved.
During the use, temperature sensor gathers temperature data in real time to data that will gather convey MCU to through wireless communication, MCU obtains the current time through RTC, MCU sends data and time to the memory and saves, MCU sends data and time to encryption module and verifies and encryption processing, later MCU sends the data after encrypting to wireless module through the timesharing transmission of wireless ad hoc network, wireless module sends the data after encrypting for platform monitored control system or remote monitering system at last.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (5)

1. The utility model provides a passive wireless switchgear temperature monitoring equipment of cubical switchboard, characterized by: the temperature acquisition device comprises at least one first temperature sensor used for acquiring the temperature of a busbar in a switch cabinet, at least one second temperature sensor used for acquiring the temperature of a moving contact of a circuit breaker in the switch cabinet and at least one third temperature sensor used for acquiring the temperature of an outdoor disconnecting link, wherein the three temperature sensors are respectively connected with a relay module in a wireless communication mode, the relay module is connected with a background monitoring system or a remote monitoring system in a wireless communication mode after being self-organized, the relay module comprises a wireless module, an encryption module, a clock chip RTC, a memory and a core processor MCU, and the temperature sensors are respectively sleeved on the busbar in the switch cabinet, on a contact finger of the circuit breaker in the switch cabinet and on the outdoor disconnecting link.
2. The switchgear passive wireless switchgear temperature monitoring device of claim 1, characterized in that: the temperature sensor adopts a CT-T200 self-powered wireless temperature sensor produced by Xian integrated powered electrical equipment Limited, and the wireless module adopts a wireless transceiving antenna produced by Shenzhen Shanghai Lin Hua Ke Tech Limited, and the model number of the wireless transceiving antenna is 3G GSM PHSANTENNA.
3. The switchgear passive wireless switchgear temperature monitoring device of claim 1, characterized in that: the clock chip RTC is used for providing accurate system time, and an internal interface of the RTC is a serial interface.
4. The switchgear passive wireless switchgear temperature monitoring device of claim 1, characterized in that: the memory is an internal memory chip and is used for storing the data acquired by the temperature sensor, and an internal interface of the internal memory chip is a serial interface.
5. The switchgear passive wireless switchgear temperature monitoring device of claim 1, characterized in that: the encryption module is a chip or a functional module supporting an encryption algorithm comprising SM2, SM1, RSA, AES, DES and 3DES, and the core processor MCU sends data to the encryption module through a serial interface.
CN201922462413.2U 2019-12-31 2019-12-31 Passive wireless switchgear temperature monitoring equipment of cubical switchboard Active CN211626718U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922462413.2U CN211626718U (en) 2019-12-31 2019-12-31 Passive wireless switchgear temperature monitoring equipment of cubical switchboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922462413.2U CN211626718U (en) 2019-12-31 2019-12-31 Passive wireless switchgear temperature monitoring equipment of cubical switchboard

Publications (1)

Publication Number Publication Date
CN211626718U true CN211626718U (en) 2020-10-02

Family

ID=72634456

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201922462413.2U Active CN211626718U (en) 2019-12-31 2019-12-31 Passive wireless switchgear temperature monitoring equipment of cubical switchboard

Country Status (1)

Country Link
CN (1) CN211626718U (en)

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