CN104390711A

CN104390711A - Contact thermometer of high-voltage switch cabinet

Info

Publication number: CN104390711A
Application number: CN201410657116.2A
Authority: CN
Inventors: 蔡斌军
Original assignee: Hunan Institute of Engineering
Current assignee: Hunan Institute of Engineering
Priority date: 2014-11-18
Filing date: 2014-11-18
Publication date: 2015-03-04

Abstract

The invention relates to electrical equipment, in particular to a contact thermometer of a high-voltage switch cabinet. The contactor thermometer comprises an upper computer, a receiving host and a transmitter module. The transmitter module is wirelessly connected with the receiving host; the receiving host is connected with the upper computer via serial communication. According to the contact thermometer of the high-voltage switch cabinet, the heat temperature of switch contacts is monitored timely and abnormal heat contacts are warned timely, so that the burnout of the contacts is prevented; meanwhile, the contact temperature is recorded in the history and the normal operation of the switch cabinet can be effectively guaranteed by analyzing historical temperature data. People can measure the temperature without going to the site; and the contact thermometer of the high-voltage switch cabinet has the advantages of reliable high-voltage isolation and anti-interference ability and is important to the safe operation of the switch cabinet.

Description

High-tension switch cabinet contact temperature measurer

Technical field

The present invention relates to electrical equipment, particularly a kind of high-tension switch cabinet contact temperature measurer.

Background technology

High-tension switch cabinet is the important electric equipment of generating plant, transformer station.High-tension switch cabinet, in During Process of Long-term Operation, because the positions such as the contact in switch cubicle or bus bar junction cause contact resistance change to be generated heat greatly because of aging, causes contact or bus bar junction temperature to raise.Contact or bus bar junction temperature raise, and its contact resistance can be made to become large further, thus produce more heat, contact resistance and become large further, form vicious cycle, finally cause fire failure, cause fault.In recent years, having there is a lot of switch cubicle overheat accident in power plant, transformer station, causes the major accident such as fire and large-area power failure, the running status of look-ahead switch cubicle, confirms switch cubicle temperature rise in allowed limits, is to stop the key that this type of accident occurs.

But the contact running temperature in high-tension switch cabinet is difficult to detect, and this is mainly because have high pressure, narrow space mostly to be again closed in cabinet, and common thermometry can not use.At present, carrying out thermometric instrument to high-voltage switch gear has two kinds, a kind of employing analog temperature sensor, and temperature accuracy is forbidden, poor anti jamming capability; Although another kind is digital temperature sensor, adopts Data Over Cable, be restricted when using in high-voltage board.

Summary of the invention

An object of the present invention is to provide the high-tension switch cabinet contact temperature measurer used in a kind of applicable high-voltage board, this temperature measurer does not need artificial scene of going to carry out thermometric, there is reliable high_voltage isolation, antijamming capability, significant to the safe operation of switch cubicle.

The invention provides a kind of suitable high-tension switch cabinet contact temperature measurer, comprise host computer, Receiving Host and transmitter module.Transmitter module is connected with Receiving Host by wireless transmission, and Receiving Host is connected with host computer by serial communication.

Receiving Host comprises a power module, display module, alarm module, MCU, wireless data receipt modules and a serial communication module, and a MCU connects power module, display module, alarm module, wireless data receipt modules and a serial communication modular respectively.

Wireless data receipt modules receives the data from transmitter module and is transferred to a MCU, a MCU will be transferred to display module displays temperature after data processing, by serial communication module, all temperature datas are sent to host computer simultaneously, when there are abnormal temperature data, a MCU transmission warning message is reported to the police to alarm module, and a power module is powered to Receiving Host.

Transmitter module comprises No. two power modules, temperature measurement module, No. two MCU and wireless data transmission module.No. two MCU are connected with wireless data transmission module with No. two power modules, temperature measurement module respectively.

Temperature measurement module sends data to No. two MCU after recording contact temperature, send to Receiving Host after No. two MCU process data by wireless data sending module.No. two power modules are to temperature measurement module, No. two MCU and wireless data transmission module for power supply.

No. two power modules obtain alternating current by CT coil and high-voltage busbar electromagnetic induction, power to after rectifying and wave-filtering temperature measurement module, No. two MCU and wireless transmitter module.

CT coil and high-voltage busbar generation electromagnetic induction obtain alternating current, alternating current becomes DC current by rectifies, DC current carries out filtering process through zero passage electric capacity again, DC current after filtering process is divided into two-way, leads up to a mu balanced circuit and electric capacity to obtain the DC current of 5V; Separately leading up to No. two mu balanced circuits and No. two electric capacity obtains the DC current of 3.3V.Two-way DC current gives temperature measurement module, No. two MCU and wireless data transmission module for power supply simultaneously.

Transmitter module comprises one or more.

Beneficial effect of the present invention is: the present invention can the heating temp of monitoring switch contact in time, to abnormal heating contact Realtime Alerts, prevents contact to be burned.Record contact historical temperature, analysis of history temperature data, effective guarantee switch cubicle normally runs.There is reliable high_voltage isolation, antijamming capability.

Accompanying drawing explanation

Fig. 1 is one-piece construction block diagram;

Fig. 2 is Receiving Host structure block diagram;

Fig. 3 is a power module circuitry figure;

Fig. 4 is transmitter module structure block diagram;

Fig. 5 is No. two power module circuitry figure;

In figure, host computer 1, Receiving Host 2, transmitter module 3, power module 4, display module 5, alarm module 6, MCU7, wireless data receipt modules 8, serial communication module 9, No. two power modules 10, temperature measurement module 11, No. two MCU12, wireless data transmission modules 13.

Specific embodiment

Hereafter will describe embodiments of the invention in detail by reference to the accompanying drawings.It should be noted that the combination of technical characteristic or the technical characteristic described in following embodiment should not be considered to isolated, they mutually can be combined and be combined with each other thus reach better technique effect.In the accompanying drawing of following embodiment, the identical label that each accompanying drawing occurs represents identical feature or parts, can be applicable in different embodiment.

Be illustrated in figure 1 one-piece construction block diagram of the present invention, the present invention is a kind of high-tension switch cabinet contact temperature measurer, comprises host computer 1, Receiving Host 2 and transmitter module 3.One or more transmitter module 3 is by wireless connections Receiving Host 2, and Receiving Host 2 connects host computer 1 by serial communication.

Be illustrated in figure 2 Receiving Host 2 structure block diagram, Receiving Host 2 comprises a power module 4, display module 5, alarm module 6, MCU7, wireless data receipt modules 8 and a serial communication module 9.A MCU7 connects a power module 4, display module 5, alarm module 6, wireless data receipt modules 8 and serial communication module 9 respectively.

Be illustrated in figure 3 power module 4 circuit diagram, a power module 4 powers mainly to Receiving Host 2.Power module 4 carries out rectifying and wave-filtering obtains 5V and 3.3V respectively direct supply through mu balanced circuit VR1 and VR2 after being obtained the alternating current of 5V by step-down transformer by 220V alternating current, the power supply JD that rectification obtains powers to the relay coil of alarm module 6.D21 ~ D24 part is that AC rectification is become direct current, and the electric capacity of C41 ~ C44 carries out filtering process to the power supply after rectification.

Be illustrated in figure 4 transmitter module 3 structure block diagram, transmitter module 3 comprises No. two power modules 10, temperature measurement module 11, No. two MCU 12 and wireless data transmission module 13.No. two MCU12 connect No. two power modules 10, temperature measurement module 11 and wireless data transmission module 13 respectively.

Be illustrated in figure 5 No. two power module 10 circuit diagrams, No. two power modules 10 obtain alternating current by the high-voltage busbar generation electromagnetic induction in CT coil and switch cubicle, alternating current becomes DC current by commutation diode D21 ~ D24 rectification, DC current carries out filtering process through electric capacity C41 ~ C44 again, DC current after filtering process is divided into two-way, leads up to mu balanced circuit VR1 and electric capacity C21, C22 to obtain the DC current of 5V; Separately leading up to mu balanced circuit VR2 and electric capacity C23, C24 obtains the DC current of 3.3V.Two-way DC current powers to temperature measurement module 11, No. two MCU12 and wireless data transmission module 13 simultaneously.

Transmitter module 3 is installed on the position that high-tension switch cabinet needs measuring tempeature, temperature measurement module 11 in transmitter module 3 carries out temperature survey, and by wireless data transmission module 13 and wireless data receipt modules 8 by thermometric data upload to Receiving Host 2, adopt serial communication between Receiving Host 2 and host computer 1, the data inquired are transferred on host computer 1 and facilitate testing staff's data query whether abnormal.The main system of host computer 1 adopts labview and configuration software, has good compatibility to industry spot watch-dog.

The present invention is by the heating temp of timely monitoring switch contact, and carry out Realtime Alerts for abnormal heating contact, prevent contact to be burned, carry out historical record simultaneously to contact temperature, analysis of history temperature data effectively can ensure the normal operation of switch cubicle.Do not need artificial scene of going to carry out thermometric, there is reliable high_voltage isolation, antijamming capability, significant to the safe operation of switch cubicle.

Although give some embodiments of the present invention, it will be understood by those of skill in the art that without departing from the spirit of the invention herein, can change embodiment herein.Above-described embodiment is exemplary, should using embodiment herein as the restriction of interest field of the present invention.

Claims

1. a high-tension switch cabinet contact temperature measurer, is characterized in that: comprise host computer, Receiving Host and transmitter module, and described host computer connects described Receiving Host by serial communication, and described Receiving Host connects described transmitter module by wireless transmission.

2. high-tension switch cabinet contact as claimed in claim 1 temperature measurer, it is characterized in that: described Receiving Host comprises a power module, display module, alarm module, MCU, wireless data receipt modules and a serial communication module, a described MCU connects a described power module, described display module, described alarm module, described wireless data receipt modules and described serial communication modular respectively.

3. high-tension switch cabinet contact as claimed in claim 2 temperature measurer, it is characterized in that: described wireless data receipt modules receives the data from described transmitter module and is transferred to a described MCU, a described MCU will be transferred to described display module displays temperature after data processing, by described serial communication module, all temperature datas are sent to described host computer simultaneously, a MCU described in when occurring abnormal temperature data transmits warning message and reports to the police to described alarm module, and a described power module powers to described Receiving Host.

4. the high-tension switch cabinet contact temperature measurer as described in any one of claim 1-3, it is characterized in that: described transmitter module comprises No. two power modules, temperature measurement module, No. two MCU and wireless data transmission module, described No. two MCU are connected with described wireless data transmission module with described No. two power modules, described temperature measurement module respectively.

5. high-tension switch cabinet contact as claimed in claim 4 temperature measurer, it is characterized in that: described No. two power modules obtain alternating current by CT coil and high-voltage busbar generation electromagnetic induction, after rectifying and wave-filtering, give temperature measurement module, No. two MCU and wireless data transmission module for power supply.

6. high-tension switch cabinet contact as claimed in claim 5 temperature measurer, it is characterized in that: described temperature measurement module sends data to described No. two MCU after recording contact temperature, send to described Receiving Host by described wireless data sending module after described No. two MCU process data, described No. two power modules power to described transmitter module.

7. the high-tension switch cabinet contact temperature measurer as described in any one of claim 1,2,3,5 or 6, is characterized in that: described transmitter module is one or more.