CN201051018Y - Switch case contact temperature monitoring and alarming system - Google Patents

Switch case contact temperature monitoring and alarming system Download PDF

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Publication number
CN201051018Y
CN201051018Y CNU2007200217767U CN200720021776U CN201051018Y CN 201051018 Y CN201051018 Y CN 201051018Y CN U2007200217767 U CNU2007200217767 U CN U2007200217767U CN 200720021776 U CN200720021776 U CN 200720021776U CN 201051018 Y CN201051018 Y CN 201051018Y
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data
temperature
switch cabinet
contact temperature
switch
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李洪景
殷衍刚
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ZIBO HUIGONG INSTRUMENT CO Ltd
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ZIBO HUIGONG INSTRUMENT CO Ltd
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Abstract

A switch cabinet probe point temperature monitor and alarm system consists of a switch cabinet temperature measuring circuit, a plurality of switch cabinet probe point temperature measuring circuits, a relative upper machine, and a remote monitor center, wherein the switch cabinet probe point temperature measuring circuit is composed of a power unit, a temperature sensor, a signal detection microprocessor, and a data transmission blue tooth module. The upper machine is composed of a data receive blue tooth module, a data process microprocessor set, a data display and alarm unit, a data communication interface and a power. The received probe point temperature data, the switch cabinet air temperature data and the switch cabinet environment temperature data are analyzed by the upper machine, and then the processed data is sent to the data display, the alarm unit, and the data communication interface, finally is sent to the remote monitor center through the network. The utility model adopts the blue tooth technique to solve the data transmission problem of the super tension isolation of power switch devices, the monitor range is larger than the monitor range of the products of the same kind, and is widely used as an online monitor of probe point temperature of the super tension switch device.

Description

Switch cabinet contact temperature monitoring and alarming system
Technical field
The utility model belongs to power equipment safety operational monitoring field, is specifically related to a kind of switch cabinet contact temperature monitoring and alarming system.
Background technology
Along with the development of electrical network and the raising of equipment and technology, 10kv, 35kv system switching cabinet use in electrical network in a large number.And the over-heat inside phenomenon of switch cubicle has become the FAQs of switch cubicle in using, because the leakproofness of switch cabinet, in the heavier area of some loads, has the temperature rise of the switch cubicle problem that exceeds standard.The temperature rise of switch cubicle exceeds standard, and directly influences the safe and stable operation of equipment, and problems of excessive heat is a constantly process of development, if do not controlled, degree of superheat is aggravation constantly, and to the performance of insulating part and produce very big influence equipment life.The primary equipment of closed high-tension switch cabinet is distributed in 3 separate compartments, is respectively switch gear room, bus-bar room, outlet chamber.By relevant rules requirement, must be on dividing plate the perforate except that realizing being electrically connected, controlling, ventilating, all compartments are closed state.6 main plugs are generally arranged on the main switch in the switch gear room, 18 tie points that flow through load current are arranged; 3 major joints that connect the outlet cable and tens contacts that are connected by-pass knife switch are arranged in the outlet chamber.More than said tie point directly flow through load current, when load is big, exist the tie point of hidden danger to generate heat.Because heat generating spot is in sealed cabinet, operating cabinet gate inhibition only opens, and the operator on duty can't find the heating defective by normal supervision means.Generating heat, joint can redden even fuse when serious, directly causes industrial accident.
According to statistics, electric system has an accident has considerable part relevant with problems of excessive heat in the reason, and contact, the connector temperature of therefore adopt an effective measure monitoring high-voltage switch gear, high voltage bus and high-tension cable are the problems that electric system need solve.
On October 15 2003 day for announcing, notification number is that the Chinese invention patent of CN 1124475C discloses a kind of " high pressure and UHV (ultra-high voltage) switch contact temperature detecting alarm system ", forms temperature measuring unit by self-power supply device, digital thermometric and infrared communication unit; Form host computer by microprocessor, RS485 communication port, infrared communication unit.Self-power supply device is to be coupled out minimum energy from bus-bar to supply with measuring junction.A cover microprocessor testing circuit is adopted in its each contact, according to the host computer instruction works, reads contact temperature and sends alerting signal; Be two-way infrared communication between temperature measuring unit and the host computer, and adopt specific communications protocol.This invention has self-powered function, adopts digital thermometric, has solved high pressure and has isolated a difficult problem, and the real time temperature of reliable detection high-voltage switch gear three-phase contact promptly and accurately sends alerting signal, guarantees mains supply safety.Its existing problems mainly are:
1, temperature measuring unit: the power supply energy of each testing circuit is from contact current, and the job stability of microprocessor testing circuit is subjected to the influence of contact current size easily, when contact current hour, the problem of power supply electricity shortage can occur; Adopt the infrared communication mode of " one to one " in addition between temperature measuring unit and the host computer, has stronger directivity, in order to guarantee communication quality, need accurately to adjust the position of infrared transceiver module on temperature sensing circuit and the panel main frame, trouble is installed, and detection is counted limited, can not the important contact temperature of complete detection.
2, the host computer unit: function setting is simple, only be that order is sent warning message and the corresponding temperature that the temperature measuring unit transmission was read and shown in instruction, send sound and light alarm when detecting warning message for the second time, warning message and detection data are not stored and analyzing and processing continuously, monitor with the variation tendency of realization important contact temperature historical data, so that do not reporting to the police as yet but contact temperature is taked corresponding measure when being rising trend, prevent the further generation of switchgear fault, realization reduces recondition expense and causality loss greatly to the initiative preventive reqair of important high voltage electric switch.
September 27 2006 day for announcing, notification number is to disclose a kind of " handcart-type primary cut-out contact on-line temperature monitoring device " in the Chinese patent of CN 2821724Y, comprise power circuit, temperature sensor, signaling conversion circuit, the wireless encoding transmitter, wireless decoding receiver and warning circuit, power circuit is made of the current transformer and the power-switching circuit that are installed on each phase contact arm, temperature sensor, temperature signal is converted on the signaling conversion circuit of electric signal and each phase contact arm that the wireless transmit scrambler is fixedly connected on isolating switch, the temperature sensor that is positioned at contact one side is connected with signaling conversion circuit by high temperature wire, signaling conversion circuit output termination wireless encoding transmitter, be used for received signal and with the output terminal device taking alarm of the wireless decoding receiver of signal decoding, the warning device output terminal connects six road pilot lamp and the alarm of the demonstration contact overtemperature state corresponding with each contact.
Wireless transmission, receive mode have been adopted in the transmission of this patent contact temperature signal, realized the potential isolation between high pressure and the low pressure equally, the overheated overtemperature state that can accurately reflect each phase contact, rational in infrastructure, compact, use reliably, easy for installation, be convenient to the installation of new equipment and the transformation of old equipment, can improve security, the reliability of switchgear operation, reduce serious accident and take place.Its existing problems mainly are:
1, thermometric transmitting terminal: send contact overtemperature alarm signal by signaling conversion circuit, can not transmit the contact temperature data; Adopt mimic channel signal Processing precision low, can not realize many definite values alarm settings;
2, Return Reception Dept. branch: can only decode and sound and light alarm to the alerting signal that receives, can not receive, store, show the contact temperature measurement data continuously, monitor important contact temperature historical data variation tendency, so that do not reporting to the police as yet but contact temperature is taked corresponding measure when being rising trend, preventing the further generation of switchgear fault.
Self-powered problem, insulating mounting problem and the overtemperature that above-mentioned patented technology the has solved high-voltage switch gear contact temperature pick-up unit preferably problem of reporting to the police on the spot, but do not solve not perfectly the contact temperature data isolate transmission problem continuously, reliably, fast and to storage, the analyzing and processing of data, instruct equipment operation, Maintenance and Repair problem and to the remote real time monitoring problem of important device contact temperature variation, not exclusively satisfy electric system to power equipment by the requirement of fault detect to state-detection.
In addition, owing on the main switch in the switch gear room in the switch cubicle 6 main plugs are arranged generally, 18 tie points that flow through load current are arranged; 3 major joints that connect the outlet cable and tens contacts that are connected by-pass knife switch are arranged in the outlet chamber.Have the place that 21 needs detect like this, any one tie point temperature is too high, all may become equipment operation accident potential, be restricted because whole check points are installed temperature measuring equipment, therefore above-mentioned patented method fails to provide the solution of all electric connecting points in the complete detection switch cubicle.
Moreover present transformer station realizes unmanned substantially, and therefore when detection system itself went wrong, can the remote monitoring center detect most important, and existing detection system lacks necessary self-checking function.
Bluetooth (Bluetooth) technology is a kind of emerging, opening, short-distance wireless communication technology standard, it can be used for need not to lay client cables in small range, need only just can realize network interconnection between the electronic equipment by the mode of wireless connections by Bluetooth adapter or receiver, realize flexibly, the wireless data communications of safety, low cost, low power consumption.The characteristics of Bluetooth technology comprise: adopt frequency hopping, the antinoise signal decline; Adopt fast frequency hopping and short group technology, reduce co-channel interference, guarantee the reliability of transmission; Adopt the forward error correction coding technology, the random noise influence when reducing long-distance transmissions; Use the ISM band of open in the world 2.4GHz, need not licensing; Adopt the FM modulation system, reduce the complicacy of equipment.Bluetooth technology is the open-standards of wireless data transmission, and it adopts wireless mode to link up various electronic equipments and various digital data system.Its transmission range is 10CM-10M, carries out full-duplex communication with time division way, and transfer rate is designed to 1Mb, supports the 64kb/s real-time Data Transmission, and emissive power is respectively 1mW, 2.5mW and 100mW, uses the EIC equipment identification code of 48 unified bits of the whole world.Because bluetooth adopts wave point to replace wire cable to connect, technology is low in energy consumption, be applicable to multiple occasion, use simple, realization easily, the user can realize the industrial digital data transfer between devices by embedded bluetooth module very easily, therefore developed fast at wireless communication field and various industrial circle since 1998 come out, market can provide the embedded bluetooth module of industrial digital equipment of complete practicality.
Summary of the invention
Goal of the invention of the present utility model is: at the deficiency that prior art exists, newly design a kind of power reliable, can realize that main contact temperature is measured in real time and data are transmitted fast, can store continuously main contact temperature data and analyzing and processing, switch cabinet contact temperature monitoring and alarming system by programming with air temperature variations detection in important contact temperature historical data trend Presentation Function, significant data remote-monitoring function and the switch cubicle, analysis, arbitration functions.Simultaneously, switch cabinet contact temperature detects as main and detects, and the switch cubicle temperature detection detects in support, to improve the reliability that detects greatly in this field.
The technical solution of the utility model is: a kind of switch cabinet contact temperature monitoring and alarming system, form by a switch cubicle temperature sensing circuit, a plurality of switch cabinet contact temperature testing circuit, corresponding host computer and remote monitoring center; Described switch cubicle temperature sensing circuit is made up of air themperature detection probe in the switch cabinet and switch cubicle environment temperature detection probe, described switch cabinet contact temperature testing circuit sends bluetooth module by power supply unit, temperature sensor, input set of microprocessors and data and forms, described temperature sensor is finished the continuous detecting to contact temperature, is converted to digital signal and carries out wireless data communications by data transmission bluetooth module and host computer after the input set of microprocessors is handled; Described host computer is by the Data Receiving bluetooth module, the data processing set of microprocessors, the data display alarm unit, data communication mouth and power supply are formed, described Data Receiving bluetooth module is finished the reception to the contact temperature data, air themperature data in the switch cabinet that described host computer is sent into the switch cubicle temperature sensing circuit, the switch cubicle ambient temperature data reaches delivers to the data display alarm unit after the contact temperature data that receive by the Bluetooth transmission mode are handled by the data processing set of microprocessors, all temperature datas after the processing are delivered to the data communication mouth simultaneously, be transmitted through the network to the remote monitoring center, realize the telemonitoring and the warning of contact temperature real time data and historical trend thereof.
Further, described power supply unit is made up of the rechargeable battery or the disposable high-energy battery of self-power supply device and paired running.
The split type structure that the core structure of described self-power supply device adopts both sides to separate fully.
Described switch cabinet contact temperature testing circuit also comprises a chip running status and cell voltage self-checking circuit.
The utility model has following advantage compared with the prior art:
1, the utility model is owing to adopted open-standards one Bluetooth technology of wireless data transmission, solved in puzzlement high pressure, the ultrahigh voltage power equipment high and low pressure potential isolation detection range real-time detection data continuously, high capacity, fast, the reliable transmission problem, make to the important contact temperature of high-tension switch gear carry out on the spot real time monitoring, remote real-time monitor, storage and analyzing and processing become possibility continuously.
2, the utility model adopts high-tension switch gear contact temperature real-time Data Transmission to low-pressure side, teletransmission is to Surveillance center again, utilize the stored digital of computing machine, analyze, treatment technology, realize the setting of many alarm set points of contact temperature by programming, and realization contact temperature historical data trend map Presentation Function, by monitoring important contact temperature historical data variation tendency, so that do not reporting to the police as yet but contact temperature is taked corresponding measure when being rising trend, prevent the further generation of switchgear fault, initiative preventive reqair be can realize, recondition expense and causality loss reduced greatly important high voltage electric switch.
3, the utility model has improved the power supply reliability of system greatly owing to adopted self-power supply device and backup battery switchover operation mode arranged side by side, has prolonged the Maintenance and Repair cycle of system, can satisfy large-scale substation safety, long-term operation requirement.
4, the core structure of the current transformer of self-power supply device of the present utility model adopts the split type structure that both sides can be separated fully, be convenient to on-the-spot the installation, two iron cores make and are screwed, and connect closely reliable, can be directly fixed on the conductive bus bar, the installation site need not be set in addition.
5, the utility model utilizes the rising of any one tie point temperature in the switch cubicle, the capital causes the principle of air temperature variations in the switch cubicle, adopted simultaneously the technical scheme that air themperature in the switch cubicle and switch cubicle variation of ambient temperature are detected, solved the high-voltage switch gear master plug temperature rise detection problem of other load current contact in addition, the reliability that greatly perfect switch cabinet contact temperature detects, the confidence level of rationality and measurement data has realized monitoring to all tie point temperature variation of switch cubicle by indirect detection.
Description of drawings
Fig. 1 is a system architecture functional-block diagram of the present utility model;
Fig. 2 is the structural principle block scheme of switch cabinet contact temperature testing circuit of the present utility model;
Fig. 3 is the structural principle block scheme of switch cubicle temperature sensing circuit of the present utility model;
Fig. 4 is the structural principle block scheme of host computer of the present utility model;
Fig. 5 is the current transformer structure scheme of installation of switch cabinet contact temperature testing circuit power supply unit of the present utility model;
Among the figure: the 1-iron core, the 2-gib screw, the 3-setting-up piece, the 4-secondary coil, 5-protects pad, 6-conductive bus bar, 7-iron core subdivision place.
Fig. 6 is the wiring diagram of the embodiment of switch cabinet contact temperature testing circuit of the present utility model;
Fig. 7 (a), Fig. 7 (b) are the wiring diagram of the embodiment of host computer of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
In Fig. 1 system architecture functional-block diagram of the present utility model, switch cabinet contact temperature monitoring and alarming system is made up of a switch cubicle temperature sensing circuit, a plurality of switch cabinet contact temperature testing circuit and corresponding host computer and remote monitoring center;
Wherein the switch cubicle temperature sensing circuit is made up of air themperature detection probe in the switch cabinet and switch cubicle environment temperature detection probe;
The switch cabinet contact temperature testing circuit sends bluetooth module by power supply unit, temperature sensor, input set of microprocessors and data to be formed, and power supply unit is the testing circuit power supply; Described temperature sensor is finished the continuous detecting to contact temperature, is converted to digital signal and carries out wireless data communications by data transmission bluetooth module and host computer after the input set of microprocessors is handled;
Host computer is made up of Data Receiving bluetooth module, data processing set of microprocessors, data display alarm unit, data communication mouth and power supply, and wherein the Data Receiving bluetooth module is finished the reception to the contact temperature data;
Air themperature data in the switch cabinet that host computer is sent into the switch cubicle temperature sensing circuit, switch cubicle ambient temperature data and handle by the data processing set of microprocessors by the contact temperature data that the Bluetooth transmission mode receives after deliver to the data display alarm unit, all temperature datas after the processing are delivered to the data communication mouth simultaneously, can be transmitted through the network to the remote monitoring center, utilize computing machine to realize the telemonitoring and the warning of contact temperature real time data and historical trend thereof by the configuration of programming.
The utility model is owing to adopted the open-standards-Bluetooth technology of wireless data transmission, solved in puzzlement high pressure, the ultrahigh voltage power equipment high and low pressure potential isolation detection range real-time detection data continuously, high capacity, fast, the reliable transmission problem, make to the important contact temperature of high-tension switch gear carry out on the spot real time monitoring, remote real-time monitor, storage and analyzing and processing become possibility continuously.
In the structural principle block scheme of Fig. 2 switch cabinet contact temperature testing circuit of the present utility model, single switch cabinet contact temperature testing circuit sends bluetooth module by power supply unit, temperature sensor, input set of microprocessors and data to be formed, and power supply unit is the testing circuit power supply.Wherein temperature sensor is finished the continuous detecting to contact temperature, is digital signal with the contact temperature conversion of signals and sends bluetooth module by data and host computer carries out wireless data communications after the input set of microprocessors is handled.
In the structural principle block scheme of Fig. 3 switch cubicle temperature sensing circuit of the present utility model, the switch cubicle temperature sensing circuit is made up of air themperature detection probe in the switch cabinet and switch cubicle environment temperature detection probe; Judge by the method for air themperature in the monitoring switch cabinet and environment temperature difference and to have or not the conductor joint heating fault.The air themperature detection probe is installed in the vent port exit position on switch cubicle top in the switch cabinet, makes its directly variation of aware switch in-cabinet temperature; And the environment measuring probe should be as far as possible away from the gas outlet, and actual temp warning definite value is determined by the method for test.Detection probe can be used the intelligent temperature measurement chip, and as DS18B20, air themperature and ambient temperature measurement result send into host computer by data line in the TMP121 etc., switch cubicle.
The utility model utilizes the rising of any one tie point temperature in the switch cubicle, the capital causes the principle of air temperature variations in the switch cubicle, adopted simultaneously the technical scheme that air themperature in the switch cubicle and switch cubicle variation of ambient temperature are detected, solved the high-voltage switch gear master plug temperature rise detection problem of other load current contact in addition, the reliability that greatly perfect switch cabinet contact temperature detects, the confidence level of rationality and measurement data has realized monitoring to all tie point temperature variation of switch cubicle by indirect detection.
In the structural principle block scheme of Fig. 4 host computer of the present utility model, host computer is by the Data Receiving bluetooth module, the data processing set of microprocessors, the data display alarm unit, data communication mouth and power supply are formed, wherein the Data Receiving bluetooth module is finished the reception to the contact temperature data, air themperature data in the switch cabinet that host computer is sent into the switch cubicle temperature sensing circuit, the switch cubicle ambient temperature data reaches delivers to the data display alarm unit after the contact temperature data that receive by the Bluetooth transmission mode are handled by the data processing set of microprocessors, all temperature datas after the processing are delivered to the data communication mouth simultaneously, the remote monitoring center be can be transmitted through the network to, the telemonitoring and the warning of contact temperature real time data and historical trend thereof realized.
The utility model adopts high-tension switch gear contact temperature real-time Data Transmission to low-pressure side, teletransmission is to Surveillance center again, utilize the stored digital of computing machine, analyze, treatment technology, realize the setting of many alarm set points of contact temperature by programming, and realization contact temperature historical data trend map Presentation Function, by monitoring important contact temperature historical data variation tendency, so that do not reporting to the police as yet but contact temperature is taked corresponding measure when being rising trend, prevent the further generation of switchgear fault, initiative preventive reqair be can realize, recondition expense and causality loss reduced greatly important high voltage electric switch.
In the wiring diagram of the embodiment of Fig. 6 single switch cabinet of the present utility model contact temperature testing circuit, temperature sensor adopts digital thermometric chip TMP121, the input set of microprocessors adopts the MSP430F1232 microprocessor chip and arranges peripheral loop by the chip requirement, data send bluetooth module and adopt PTR4000, and the temperature data that under the control of microprocessor chip the thermometric chip is recorded sends to host computer by the Bluetooth transmission mode; Power supply unit (not marking among the figure) is made up of the rechargeable battery or the disposable high-energy battery of self-power supply device and paired running.Self-power supply device adopts the current transformer power technology, when charging current hour, switch to standby rechargeable battery or disposable high-energy battery.
The switch cabinet contact temperature testing circuit also comprises a chip running status and supplying cell voltage self-checking circuit (not marking among the figure), 10 A/D converters that this circuit utilizes MSP430F1232 inside to have, detect the difference of this chip power supply battery anode and negative terminal voltage by software control chip internal switch, it is the size of supplying cell voltage, the size of this voltage is become digital quantity, sending bluetooth module together with chip operation self check data by the PTR4000 data sends related data, host computer shows in the locality after receiving related data, and deliver to the remote monitoring center by the RS485 mouth after further gathering switch cubicle temperature sensing circuit and host computer data processing set of microprocessors chip self check information, thereby realize remote monitoring to system module operation exception situation and backup battery electric quantity change situation.
Plug P8 meets commercially available bluetooth module PTR4000 (not marking among the figure), and microprocessor chip U1 provides required control signal of PTR4000 and data-signal, only uses a passage on the PTR4000, and only works in transmit status.U1 provides CE, CS, and DATA, CLK1, DR1 five signal line, it is high level that microprocessor chip U1 at first puts PWR, and PTR4000 is worked on power, and then PTR4000 is carried out the initialization setting.After setting completed, PTR4000 is in transmit status, and microprocessor control PTR4000 sends a secondary data at set intervals, and the time interval was provided with arbitrarily between 1 second-5000 seconds.After transmission finishes, PWR, CS, CE are in disarmed state, make PTR4000 be in dormant state.When needs send data once more, PWR, CS, CE are in effective status, send data once more, and transmission finishes, and PTR4000 is in dormant state once more.
Thermometric chip U2 contacts tested switch cubicle contact, the request for utilization of pressing chip, and U1 provides spi bus signal S0, CS, SCK signal, is connected on the PIN4 of U2 respectively, PIN5, PIN6.The temperature difference of contact in the tested switch cubicle, U1 is just different from the data that U2 reads.U1 sends temperature measurement data by the PTR4000 wireless module above the plug P8 after the U2 sense data, host computer with this Data Receiving to after carry out data processing again.
P3 is the JTAG mouth, is used for the usefulness to the U1 code programming.
FOSC, C1, C2 provide U1 work required clock, and C3, C4 are filter capacitors.
P1, RP1 forms the manual dial setting of power saving, and according to this setting, U1 just can know should make PTR4000 be operated on that frequency range.
Thermometric chip U2 can imbed as the part of isolating switch contact arm near plum blossom pawl head, and its output digital signal changes with temperature, and the microprocessor chip U1 with the contact temperature testing circuit of the high-pressure side that coexists links to each other by high temperature wire.
Six switch cabinet contact temperature testing circuits are installed in respectively near the interior moving contact of switch cubicle (comprising upper contact head A, upper contact head B, upper contact head C, following contact A, following contact B, following contact C), isolating switch contact arm for example, also can be installed on the busbar, pass through the wireless system swap data with the host computer main frame that is installed on the switch cubicle panel.
The switch cabinet contact temperature testing circuit is close to each contact arm installation mutually of high-voltage switch gear with temperature sensor, makes this partial circuit be enclosed within fully in the insulating cylinder of contact arm; Take simultaneously measure such as heat insulation, antidetonation to make that original relative insulation distance is unaffected when mounted, ensured original insulating capacity.
Self-power supply device adopts the current transformer power technology of prior art, and solution is that current transformer is installed on bus, and therefrom taking out electric current is rear end thermometric sensing circuit power supply.Because the circuit breaker bus line current changes from tens and pacifies to several kilo-amperes doubly, its variation reach tens times big, for guaranteeing that mutual inductor can provide comparatively stable power, utilize the iron core magnetic saturation characteristic, promptly suitably choose the magnetoconductivity of the sectional area and the ferromagnetic material of current transformer core, make the normal excitation of its energy when bus flows through normal current.In case bus flows into big electric current, the iron core magnetic saturation slowly changes induction electromotive force, adds stabilivolt again, can make it provide more stable working power to temperature sensor circuit.
The self-power supply device of prior art comprises two utmost point stabilivolts that connect between the coil outside a square or annular core that can make switch contact arm or terminal place bus-bar pass and be placed in one, the iron core, the bridge full wave rectifier that is connected with the coil two ends, the bridge full-wave rectifier output terminal; Switch contact arm or conductive bus bar are equivalent to former limit one circle, and secondary coil is that the N circle constitutes secondary coil on iron core.
When charging current hour, the working power that current transformer provides differs and guarantees switch cabinet contact temperature testing circuit operate as normal surely, therefore, chargeable back-up cell of paired running or disposable high-energy battery, when being lower than setting value, the working power that provides when current transformer switches to battery operation by the detection commutation circuit that is provided with, just often recover the self-power supply device operation, set detection commutation circuit adopts prior art.
The utility model also improves the core structure of the current transformer of prior art self-power supply device, as shown in Figure 5.Its design feature is: but iron core 1 is symmetry dissection type two-part structure; from the hole at secondary coil 4 centers, pass the magnetic circuit part that constitutes current transformer; secondary coil 4 is fixed on the iron core by gib screw; iron core 1 is fixed on the conductive bus bar 6 by gib screw 2, setting-up piece 3, protection pad 5, and protection pad 5 is used to protect conductive bus bar 6 not to be subjected to the scuffing of screw when mounted.
Fig. 5 (a) is the structure scheme of installation of iron core 1 left and right sides dissection type, and Fig. 5 (b) is the structure scheme of installation of iron core dissection type about in the of 1, and the subdivision position is represented with iron core subdivision place 7, the installation site difference of iron core, and the installation site of corresponding secondary coil is also different.
The split type structure that the core structure of the current transformer of self-power supply device of the present utility model adopts both sides to separate fully, be convenient to on-the-spot the installation, two iron cores make and are screwed, and connect closely reliable, can be directly fixed on the conductive bus bar, the installation site need not be set in addition.
In the wiring diagram of the embodiment of Fig. 7 (a), Fig. 7 (b) host computer of the present utility model, the Data Receiving bluetooth module adopts commercially available PTR4000; The data processing set of microprocessors is by microprocessor chip D2:W77LE58, D4:W77LE58, and watchdog circuit D3:X5045, D5:X5045 and peripheral circuit are formed; The data communication mouth is made up of RS485 conversion chip D1:SN75LBC184P and peripheral circuit thereof; The data display alarm unit adopts LCD display: MOBI2006; Power supply employing alternating current 220V civil power and transformation thereof, rectification circuit provide dc supply.
Power supply: finish AC power is become the needed direct supply of equipment work.Circuit uses transformer that the electric main of 220V is become two groups of 8V interchange outputs that are isolated from each other, obtain+DC voltage of 5V through plug P2, rectifier bridge Z1, regulator block W1:7805, again through DC voltage regulator block W2:AMS117A-3.3 obtain+DC voltage of 3.3V is as primary power; C7, C8, C9, C10, C11, C12, C13, C14, C15 are filter capacitor among the figure.
Another road exchanges output through rectifier bridge Z2, regulator block W3:7805, obtain that another road isolates+DC voltage of 5V, be the RS485 confession of isolating.
Data Receiving bluetooth module: PB1, PB2, PB3 is independently of one another, but identical three sockets of pinout, be inserted with the bluetooth module PTR4000 (not marking among the figure) of the commercially available 2.4GHZ of working in thereon, mainly finish the wireless telecommunications with the switch cabinet contact temperature testing circuit, the pin of three plugs is fully by the requirement wiring of PTR4000.The course of work of three modules is identical.Each module can receive the data of two channels simultaneously, and these two channels differ 8MHz.
PB1, PB2, these 3 of PB3 independently bluetooth module finish with switch cubicle in the wireless telecommunications of A, B, upper and lower contact six road contact temperature testing circuits of C three-phase, cpu chip D4 gives host CPU chip D2 by serial port with data with measurement result after receiving again, for demonstration and data analysis, processing.
PB1, PB2, last 3 blocks of data of PB3 receive the wireless telecommunications address setting and the course of work thereof that data send between the bluetooth module in A, B, upper and lower contact six road contact temperature testing circuits of C three-phase in bluetooth module and the switch cubicle and are prior art, do not repeat them here.
Below be that example illustrates its course of work with host computer PB1 passage.
It is high level that cpu chip D4 at first puts PWR, and PTR4000 is worked on power, and then PTR4000 is carried out the initialization setting.After setting completed, PTR4000 is in accepting state, waits for receiving key cabinet contact temperature signal.After receiving useful signal, the pin DR1 of PTR4000 (A-DR1 on the corresponding PB1) becomes high level, and notice D4 can come reading of data.D4 according to the sequential drive signal CE of PTR4000 regulation, CS, CLK1, DATA (be respectively A-CE on the corresponding PB1, A-CS, A-CLK1, A-DATA), after D4 read all useful signals, DR1 became low level.In like manner, after another passage on the PTR4000 received useful signal, DR2 (A-DR2 on the corresponding PB1) became high level, and notice D4 can come reading of data.D4 according to the sequential drive signal CE of PTR4000 regulation, CS, CLK2, Dout2 (be respectively A-CE on the corresponding PB1, A-CS, A-CLK2, A-Dout2), after D4 read all useful signals, DR2 became low level.
After D4 runs through the useful data of six road wireless signals on three PTR4000 modules, wait for that another CPU (D2) is with this data read.Two CPU (D2 and D4) are by the serial port swap data.
Crystal oscillator chip JTb1, capacitor C b3, Cb4 provide cpu chip D4 work required clock, and crystal oscillator chip JT1, capacitor C 5, C6 provide cpu chip D2 work required clock.
LED B2, LEDB3 are respectively to send out and receive the indication diode.LEDB1 is a D4 indication diode working properly, and its flicker frequency is 0.5HZ.
D5 (X5045) is the watchdog circuit of D4, prevents that D4 from occurring crashing because of disturbing.D5 can also store the radio channel data.
The keyboard input that cpu chip D2 finishes host computer is set and is shown output, and with obtain temperature measuring data from cpu chip D4 serial communication, receive the data that D4 sends after, these data are sent to LCD display: MOBI2006 shows.D2 has the dual serial mouth, and serial port 1 is used for the swap data with D4, and serial port 2 is transformed into the RS485 mouth and is used for and remote monitoring center swap data.
D3 is the watchdog circuit of D2, prevents that D2 from occurring crashing because of disturbing.D3 can also store the radio channel data and with respect to the address of host computer, so that networking.
The RS485 mouth of isolating is made up of optocoupler U1, U2, U3, D1 and peripheral circuit.Serial signal RXD0, TXD0, TXEN receive PIN1, PIN2, the PIN3 of RS485 conversion chip D1 respectively after optocoupler U1, U2, U3 isolate, PIN4 is transformed into the RS485 signal after plug P1 receives on the 485 extraneous networks through D1.
All circuit of whole host computer main frame are embedded to be installed on the screen of switch cubicle, does not have any electric contact with switch contact.
Commercially available digital thermometric chip S18B20 (not marking among the figure) is installed on switch cubicle exhaust outlet place, be used for the measurement of switch cubicle in-cabinet temperature, another piece numeral thermometric chip S18B20 is installed on away from the exhaust outlet place, be used for detector switch cabinet environment temperature, measurement result is sent into host computer cpu chip D2 by data line.
Host computer is stored, analyzes, is handled air themperature data, switch cubicle ambient temperature data and switch cabinet contact temperature data in the switch cabinet that receives, even after the power down, these data still are retained in the cpu chip, and the data after the processing can directly show by the LCD of host computer main frame.When needs when data are transmitted in a distant place, can outwards transfer data to the remote monitoring center with network's mode by isolating 485 mouthfuls.
The stored digital that the remote monitoring center utilizes computing machine to have, analyze, treatment technology, can realize the setting of many alarm set points of contact temperature by programming, in the distance on the computer operator station of Surveillance center, utilize prior art to be easy to realize contact temperature historical data trend map Presentation Function by the corresponding software configuration, by monitoring six important contact temperature historical data variation tendencies, can not report to the police as yet but contact temperature is taked corresponding measure when being rising trend, prevent the further generation of switchgear fault, initiative preventive reqair be can realize, recondition expense and causality loss reduced greatly important high voltage electric switch.The remote monitoring center utilizes computing machine by the programming configuration data to be stored, analyze, handled and be prior art, does not give unnecessary details at this.
Systemic circulation sampling A, B, upper and lower contact six tunnel temperature of C three-phase, air themperature and switch cubicle ambient temperature data in the while detector switch cabinet cabinet, sensing range covers the interior all electric connecting points of switch cubicle; Contact temperature testing circuit and temperature sensor thereof can be installed in circuit breaker cart moving contact side, are convenient to install, safeguard and maintenance; Its power supply is taken from bus current, and is with reserve rechargeable battery or the mutual cut-in stand-by of disposable high-energy battery, practical; Do not influence original insulating property of high-voltage board, can directly monitor all electric terminal temperature rises variations in contact temperature variation and the indirect detection switch cubicle in real time, have associated temperature data presentation, historical trend demonstration and overtemperature alarm function, and all temperature data can be uploaded to the remote monitoring center by computer network, form a transformer substation switch cabinet contact temperature data distant place and gather monitoring system, help improving the switch cubicle safe operation, improve the mains supply reliability.
The utility model adopts the blue-teeth data Radio Transmission Technology, solved the high pressure isolated data transmission difficult problem of power switchgear, can monitor the real time temperature of high-voltage switch gear three-phase contact reliably, in time, send warning message exactly, and can take corresponding measure in advance by monitoring the historical trend of contact temperature, prevent the further generation of switchgear fault, the relative like product of monitoring range is wide, can be widely used in the contact temperature on-line monitoring of high pressure, UHV (ultra-high voltage) switchgear.

Claims (4)

1. a switch cabinet contact temperature monitoring and alarming system is made up of a switch cubicle temperature sensing circuit, a plurality of switch cabinet contact temperature testing circuit, corresponding host computer and remote monitoring center; Described switch cubicle temperature sensing circuit is made up of air themperature detection probe in the switch cabinet and switch cubicle environment temperature detection probe, described switch cabinet contact temperature testing circuit sends bluetooth module by power supply unit, temperature sensor, input set of microprocessors and data and forms, described temperature sensor is finished the continuous detecting to contact temperature, is converted to digital signal and carries out wireless data communications by data transmission bluetooth module and host computer after the input set of microprocessors is handled; Described host computer is by the Data Receiving bluetooth module, the data processing set of microprocessors, the data display alarm unit, data communication mouth and power supply are formed, described Data Receiving bluetooth module is finished the reception to the contact temperature data, air themperature data in the switch cabinet that described host computer is sent into the switch cubicle temperature sensing circuit, the switch cubicle ambient temperature data reaches delivers to the data display alarm unit after the contact temperature data that receive by the Bluetooth transmission mode are handled by the data processing set of microprocessors, all temperature datas after the processing are delivered to the data communication mouth simultaneously, be transmitted through the network to the remote monitoring center, realize the telemonitoring and the warning of contact temperature real time data and historical trend thereof.
2. switch cabinet contact temperature monitoring and alarming system according to claim 1 is characterized in that: described power supply unit is made up of the rechargeable battery or the disposable high-energy battery of self-power supply device and paired running.
3. switch cabinet contact temperature monitoring and alarming system according to claim 2 is characterized in that: the split type structure that the core structure of described self-power supply device adopts both sides to separate fully.
4. according to claim 1 or 3 described switch cabinet contact temperature monitoring and alarming systems, it is characterized in that: described switch cabinet contact temperature testing circuit also comprises a chip running status and cell voltage self-checking circuit.
CNU2007200217767U 2007-05-31 2007-05-31 Switch case contact temperature monitoring and alarming system Expired - Lifetime CN201051018Y (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100533081C (en) * 2007-05-31 2009-08-26 淄博惠工仪器有限公司 Switch cabinet contact temperature monitoring and alarming system
CN101813525A (en) * 2010-04-02 2010-08-25 上海天宇电气有限公司 Electric contact temperature online detecting device of high/low voltage power transmission and distribution apparatus
CN102507029A (en) * 2011-10-18 2012-06-20 江苏科技大学 Multipoint temperature monitoring device and method of high-voltage switch cabinet
CN102062640B (en) * 2009-11-16 2012-06-27 淄博正瑞电子有限公司 High-voltage switch temperature monitoring and early warning system
CN102928099A (en) * 2011-08-11 2013-02-13 常州帕斯菲克自动化技术有限公司 Wireless temperature measuring device for contact of high-voltage switch
CN103529351A (en) * 2013-10-29 2014-01-22 李宏仁 System and method for monitoring thermal defect of high-tension switch cabinet on line
CN103792024A (en) * 2014-02-19 2014-05-14 北京百象电气成套设备有限公司 Temperature monitoring system for high-tension switch cabinet
CN104390711A (en) * 2014-11-18 2015-03-04 湖南工程学院 Contact thermometer of high-voltage switch cabinet

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100533081C (en) * 2007-05-31 2009-08-26 淄博惠工仪器有限公司 Switch cabinet contact temperature monitoring and alarming system
CN102062640B (en) * 2009-11-16 2012-06-27 淄博正瑞电子有限公司 High-voltage switch temperature monitoring and early warning system
CN101813525A (en) * 2010-04-02 2010-08-25 上海天宇电气有限公司 Electric contact temperature online detecting device of high/low voltage power transmission and distribution apparatus
CN102928099A (en) * 2011-08-11 2013-02-13 常州帕斯菲克自动化技术有限公司 Wireless temperature measuring device for contact of high-voltage switch
CN102507029A (en) * 2011-10-18 2012-06-20 江苏科技大学 Multipoint temperature monitoring device and method of high-voltage switch cabinet
CN103529351A (en) * 2013-10-29 2014-01-22 李宏仁 System and method for monitoring thermal defect of high-tension switch cabinet on line
CN103529351B (en) * 2013-10-29 2016-03-09 李宏仁 High-tension switch cabinet thermal defect on-line monitoring system and method
CN103792024A (en) * 2014-02-19 2014-05-14 北京百象电气成套设备有限公司 Temperature monitoring system for high-tension switch cabinet
CN104390711A (en) * 2014-11-18 2015-03-04 湖南工程学院 Contact thermometer of high-voltage switch cabinet

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