CN102607733B - Electric transmission and transformation equipment contact luminous temperature sensing cap system - Google Patents
Electric transmission and transformation equipment contact luminous temperature sensing cap system Download PDFInfo
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Abstract
The invention discloses an electric transmission and transformation equipment contact luminous temperature sensing cap system. The system comprises a power supply device, an electric transmission and transformation equipment contact luminous temperature sensing cap and a monitoring center; the power supply device is electrically connected with the electric transmission and transformation equipment contact luminous temperature sensing cap; the electric transmission and transformation equipment contact luminous temperature sensing cap comprises a wireless transmitting module, and the wireless transmitting module is communicated with a wireless receiving module of the monitoring center through a network; and the electric transmission and transformation equipment contact luminous temperature sensing cap also comprises a fixed and shielded part and a temperature measuring part, wherein the temperature measuring part is arranged in the fixed and shielded part, and a luminous early warning device is arranged in the temperature measuring part. The invention has the advantage that the system is affected little by the outside because independent circuits are used for monitoring the temperature. Different color lamps are displayed according to different temperature control circuits, and the system can accurately monitor temperature, and has stable performances and an obvious practical effect.
Description
Technical field
The present invention relates to a kind of electric system power transmission and transforming equipment joint temperature sensing system, relate in particular to the illuminated temperature-sensitive cap of a kind of power transmission and transforming equipment contact system.
Background technology
Along with improving constantly of China's expanding economy and people's living standard, the power load amount that electric company supplies with also increases rapidly, and how this can accomplish that for electric company safe and reliable power supply has higher requirement.
In the electrical network of actual motion, power transmission and transforming equipment is connected with countless connection contacts each other; Along with the increase of power load, it is more and more that connection contact heating is counted, and amount to heating and count and be the gesture of rising year by year, and line tripping accident overheated by contact and that cause is also the gesture of rising year by year.
How to strengthen the thermometric work to power transmission and transforming equipment contact, prevent the security incident that power transmission and transforming equipment contact causes because of excess temperature, ensure that the safe and reliable operation of power transformation, electric line becomes the most important thing of electric company's work schedule.
Yi Mou electric company local 10kV outlet cable is example: 87 of 10kV circuit statistics, connection contact amounts to 672 places.
2008-2010 10kV outlet cable line connects contact heating situation statistical form
Table 1
By statistical form, can be found out, 2008-2010 10kV contact heating situation is in rising trend year by year
2008-2010 power transmission and transforming equipment breaking number of times statistical form
Table 2
By above chart, can find out power transmission and transforming equipment under 2008-2010 company, except excess temperature cause connection contact to damage causing trip accident in rising trend year by year, other breaking number of times is on a declining curve just year by year.
In the < < of State Grid Corporation of China charged electric power apparatus inspection specifications > >, strengthen that the thermometric work of power transmission and transforming equipment is had to clear and definite requirement.At present, conventional technological means is temperature display wax sheet, temperature-sensitive cap are set on connection contact or adopt the modes such as far infrared temperature measurement instrument collecting temperature, and these modes have the following disadvantages in practice:
1, along with the increase of power load, newly-increased circuit is more and more, and far infrared temperature measurement instrument is not only expensive, and existing technical staff is not enough, and the outfit of far infrared temperature measurement instrument thermometric is not in place in addition, will directly cause thermometric to make an inspection tour situation not in place.
2, the method for monitoring heat generating spot is outmoded, in substation bus bar row connecting portion, 10kV switch cubicle, also continues to use old-fashioned temperature display wax sheet, and at present a lot of switch cubicle rear view windows are too small, have the problem of observing thermometric inconvenience.
3, two kinds of temperature-sensitive caps of WGLM-14-90, WGLM-12-90 that the temperature-sensitive screw cap Shi Mou company using in production work at present produces, the weak point that temperature-sensitive cap exists is:
(1) its principle of work of temperature-sensitive cap is magnetite adhesive, in interim overload excess temperature situation, once cannot automatically recover after tripping, easily causes erroneous judgement disconnected, and circuit must have a negative impact by power failure manual reset ，Dui company electricity sales amount.
(2) redness of the long-term temperature-sensitive cap using indicates and can under the factors such as sunshine, progressively fade in erosion by wind and rain, and identification characteristics cannot normally show, if be arranged on such as on high-tension line steel tower, staff is only with naked-eye observation, and more difficult resolution, is unfavorable for the timely eliminating of fault.
(3) scope of application is little, is only applicable to electric line.
Summary of the invention
The technical problem to be solved in the present invention is too outmoded for the thermometric mode of existing power transmission and transforming equipment, not directly perceived, the deficiency that cannot long-rangely know after power transmission and transforming equipment connection point over-temperature, the illuminated temperature-sensitive cap of a kind of power transmission and transforming equipment contact system is provided, it has reasonable in design, and monitoring result is advantage intuitively.
To achieve these goals, the present invention adopts following technical scheme:
The illuminated temperature-sensitive cap of a kind of power transmission and transforming equipment contact system, it comprises supply unit, the illuminated temperature-sensitive Mao, of power transmission and transforming equipment contact Surveillance center, described supply unit is electrically connected to the illuminated temperature-sensitive cap of power transmission and transforming equipment contact, the illuminated temperature-sensitive cap of described power transmission and transforming equipment contact comprises wireless transmitter module, and described wireless transmitter module is by network and Surveillance center's wireless receiving module communication; The illuminated temperature-sensitive cap of described power transmission and transforming equipment contact also comprises fixing and masked segment and temperature measurement fraction, and described temperature measurement fraction is arranged in fixing and masked segment, is provided with luminous prior-warning device in temperature measurement fraction.
Describedly fixing comprise fastening end and temperature-sensitive cap screening can with masked segment, be milled with flatly on the sidewall of described fastening end, lower surface is provided with internal thread counterbore, the fastening bolt immovable fitting of internal thread counterbore and power transmission and transforming equipment contact; Upper surface, fastening end and temperature-sensitive cap screening can bottom connect as one, and described temperature-sensitive cap screening can is stainless steel casing or aluminum alloy casing or glass fibre shell; On the sidewall of described stainless steel casing or aluminum alloy casing or glass fibre shell, be provided with at least one hole, described luminous prior-warning device coordinates installation with hole.
Described supply unit is high pressure self-supplying power source mode, is included in the high pressure self-supplying power source transformer iron core coil of responding to power taking on power equipment; Described high pressure self-supplying power source mutual inductor is open type forceps type structure CT or bolted bus bar formula open C T; described Current Transmit primary side carries out electromagnetic coupled induction by open type forceps type structure or bolted bus bar formula with power equipment circuit and is connected; Current Transmit secondary side is connected with flat ripple reactance; flat ripple reactance is connected with rectifier bridge; rectification bridge output end is connected successively with electric capacity of voltage regulation, voltage protection circuit, LC filtering circuit and DC-DC module, current-limiting resistance, and current-limiting resistance is connected with the illuminated temperature-sensitive cap of power transmission and transforming equipment contact.
Described temperature measurement fraction comprises thermometric sensing circuit; Processor circuit and luminous prior-warning device; Described thermometric sensing circuit, processor circuit and luminous prior-warning device are electrically connected to successively; Described thermometric sensing circuit comprises temperature probe, and described temperature probe is thermistor or thermojunction type temperature controller or semiconductor integrated temperature sensor.
Described processor circuit comprises single-chip microcomputer, and described single-chip microcomputer is connected with wireless transmitter module; Described single-chip microcomputer is also connected with thermistor or thermojunction type temperature controller or semiconductor integrated temperature sensor and luminous prior-warning device respectively.
Described processor circuit comprises comparer, described comparer is two, two comparers with same set of or two independently thermistor or thermojunction type temperature controller or semiconductor integrated temperature sensor are connected, two comparator output terminals are connected with luminous prior-warning device with wireless transmitter module, and described comparer is MAX965 supply voltage comparer.
Described luminous prior-warning device comprises LED light, and described LED light is super bright dual-colored LED pilot lamp or common LED pilot lamp, described double-colored be green and red; Described LED light is connected with processor circuit and is fixed in the hole that temperature-sensitive cap screening can sidewall is provided with.
Between described temperature probe and fixing and masked segment, be provided with heat-conducting glue.
Described supply unit adopts dry battery type power supply or solar cell.
Described network comprises GSM/GPRS/CDAM/3G network.
In one-piece construction of the present invention, various piece has multiple consideration:
One, supply unit
Adopt dry battery type power mode or utilize CT on power equipment, to respond to power mode or the solar cell formula power mode of power taking
Mention three kinds of power supply modes are analyzed, as shown in table 3:
Table 3
Utilize CT on power equipment, to respond to the power mode of power taking, can realize now, the voltage of generation and power meet the job requirement of the illuminated temperature-sensitive cap of our research completely, voltage stabilization, and do not need backup battery group, small volume.Can set up electric current induction power taking theoretical model.
Working power of the present invention adopts the power mode of responding to power taking on power equipment, specifically adopt the current transformer (power supply CT) being of coupled connections with power equipment, this current transformer is according to the difference of bus wire diameter, adopt corresponding with it magnetic core aperture, be sleeved near the bus of power transmission and transforming equipment contact, form punching, for illuminated temperature-sensitive cap provides working power, meet request for utilization.
Due to energy, by one time, high-pressure side bus current, the electromagnetic induction by power supply CT produces completely, therefore can be referred to as high pressure self-supplying power source.Self-supplying power source can, when giving the reliable energy supply of high-pressure side electronic installation, guarantee reliable insulation over the ground.This device long-time running is reliable and stable, and technology maturation, has very strong adaptive faculty to transmission line of electricity curent change, possesses short circuit and dash current self-protection, can be all kinds of transmission line of electricity on-line monitorings and watch-dog reliable power supply is provided.Performance characteristics induction energy fetching, high efficient and reliable, Maintenance free; Totally enclosed type design, adapts to rugged surroundings, and easy for installation, wiring is simple; Stable, can the in the situation that of circuit curent change, keep stable output; Output voltage stabilization, ripple is little; More than output power can reach 200W; Can be greater than continuous firing under 1000A electric current, can be greater than short time steady operation under 3000A electric current; Be arranged on 6kV to 500kV free voltage grade transmission line of electricity.The illuminated temperature-sensitive cap of this unit feeding is used as power supply, effectively solves the problem that power supply can not permanently effective supply, has also increased the usable range of the different electric pressures of illuminated temperature-sensitive cap simultaneously.
The method of induction power taking, according to the theory in Electromagnetic Field, the method of induction power taking has a lot, modal method is utilized inductive coil power taking exactly, it is the principle of CT, the electric field that the electric current that cycle changes can change in the generation cycle, the magnetic field that the electric field that the cycle changes can change in the generation cycle, vice versa.
The situation of the bus current in high-pressure side is very complicated, and electric current is minimum may only have several peaces, and transient current may reach tens of kilo-amperes while being short-circuited fault.The difficult point of this Power Management Design is mainly: bus current, when approaching unloaded little current status, guarantee the supply of power supply as far as possible; And when bus current is in surpassing a lot of current state of rated current, during as short trouble state, give power supply enough protections, and can guarantee power supply supply.Therefore, design effort mainly concentrates on the electric current that is changed on a large scale and is converted into a constant pressure source.
In order to limit the output of the voltage and current of power supply CT under current state, can adopt flat ripple resistance limits mode, it utilizes the saturation characteristic of power supply CT, the voltage energy that is 3～60V to the current conversion of tens kilo-amperes several peaces on bus.
Power supply CT directly induces alternating voltage from primary current; after flat ripple reactance, full-wave rectification conversion; on electric capacity of voltage regulation C, obtain pressing Uc compared with galvanic current; pass through again voltage protection circuit; LC filtering circuit and the power supply that becomes 3.3V after the conversion of DC-DC module and current-limiting resistance, for electronic circuit in equipment.Under CT degree of depth state of saturation, induced voltage and induction current all significantly rise, and the position between CT and rectifier bridge adds after flat ripple reactance L, can share the high voltage of most CT inductions, and limit the electric current output of CT.Described voltage protection circuit adopts voltage comparator mode; pre-set the upper voltage limit that meets reliably working; as voltage threshold; comparer is compared with threshold voltage value to actual acquisition magnitude of voltage; when actual acquisition magnitude of voltage surpasses threshold voltage value, comparer output reversion, drives and is connected to large power triode or the metal-oxide-semiconductor conducting on positive and negative polarities; carry out energy and release, to alleviate the impact of the suffered change in voltage of subsequent conditioning circuit parts.The patent No. 201120157362.3 relates to the DC power supply apparatus that a kind of cable that is in operation obtains electric energy this is introduced to some extent; in circuit, also can adopt the control circuits such as stabilivolt in addition, employing controllable silicon is realized overvoltage protection and energy leadage circuit as the mode of the main circuit of releasing.Or adopt single-chip microcomputer that the voltage of operating circuit is sampled, compared, drive energy leadage circuit thereafter, meet the tracking of circuit voltage fluctuation is adapted to, when especially voltage skyrockets, circuit energy is released.
Through contrast, the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system need to be arranged on the field of indoor and circumstance complication, requires stronger adaptive capacity to environment and stronger flying power, so select to utilize CT to respond to the power mode of power taking on power equipment.
Two, temperature measurement fraction
Comprise and be divided into thermometric sensing circuit, processor circuit and luminous prior-warning device:
1, thermometric sensing circuit
The main temperature control element such as thermojunction type, thermistor, semiconductor integrated temperature sensor of using of power transmission and transforming equipment contact heating at present.
The selection of thermometric sensing circuit element:
I), thermopair
Feature: temperature measuring area is wide is generally used in the temperature range of-180 ℃～2800 ℃, especially in high temperature range, has higher precision, even also exist and measure temperature error between shortcoming same model thermopair, price is more expensive, and temperature-sensitive cap is used inconvenience in batches.
II), thermistor
Feature: temperature-measuring range, at-50 ℃～+ 300 ℃, has higher sensitivity, and electrical resistance temperature variation has significant variation, have volume little, respond the features such as fast, low in energy consumption, long service life, price be low.
III), semiconductor integrated temperature sensor
Feature: temperature-measuring range is at-55 ℃～+ 150 ℃, and temperature measuring area is smaller, and temperature measurement accuracy is high, and volume is slightly large, expensive.
Thus, thermistor temperature detecting scope is applicable to, and precision reaches requirement, and volume is little, it is fast, low in energy consumption to respond, long service life, price are low, preferably selects the thermal sensing element that thermistor is temperature-sensitive cap.
2, the selection of processor circuit:
I), single-chip microcomputer
Meet field control, cost is lower, innernal CPU, internal memory, parallel bus.But need technician to there is corresponding development ability.
II), supply voltage comparer
For automatic control circuit, voltage detection circuit.Briefly, voltage source voltage comparator is integrated circuit, and two analog voltages are compared to its height, and according to judgement, wherein which voltage is high or low, exports corresponding upset, for subsequent conditioning circuit provides control signal.Have that precision is high, volume is little, the advantage such as low in energy consumption, long service life, price are low.
The function that supply voltage comparer possesses more meets the selection of temperature-sensitive cap processing module.Temperature measurement fraction is formed by supply voltage comparer system, forms that switch speed is fast, time delay is little, has advantages of that low current, little encapsulation, turn-off function are strong.
3, the selection of luminous prior-warning device
I), common LED pilot lamp
An alone monochromatic burner can not be made and giving warning in advance and the indication of the two states of overtemperature alarm when excess Temperature.
II), super bright dual-colored LED pilot lamp
Operating voltage is very low; Working current is very little; Shock resistance and anti-seismic performance are good, and reliability is high; Life-span is long; The electric current power of passing through by modulation is the power of modulated luminescence easily.Can when 70 ℃ of power transmission and transforming equipment contact excess temperatures, make and giving warning in advance, and low in energy consumption long service life, the advantage such as cheap.Therefore selecting super bright dual-colored LED pilot lamp is the light-emitting component of temperature-sensitive cap.
Super bright color-changed LED pilot lamp is used low-tension supply, supply voltage is controlled at 3.3V by being connected in series suitable current-limiting resistance, elevating control with voltage shows different colored lights, the effect producing can reach 50 lumens/watt, stability is high, 100000 hours light decays are initial 50%, and the response time is nanosecond.
Preferred version: thermistor is that thermal sensing element, the supply voltage comparer of temperature-sensitive cap is that processing module, super bright dual-colored LED pilot lamp LED light are the light-emitting component of temperature-sensitive cap.In addition, for increasing remote monitoring ability, wireless transmitter module is set in device, after contact generation excess temperature, the contact temperature state by monitoring, offers Surveillance center by network.
Three, fixing and masked segment
Fixing and masked segment will reach following technical indicator:
(1), shielding case structure
A, can adapt to various environment.B, stainless steel casing, according to there being good shielding action.C, light weight, intensity is high, good seal.
(2), the fixed form of high pressure self-supplying power source
A, high pressure self-supplying power source can be firmly secured on wire.B, adapt to the model of various conventional wires.
C, assurance do not produce damage to wire.D, wire resonance is not exerted an influence.
(3), the fixed form of temperature-sensitive cap
A, be arranged on b on the fastening bolt of connecting portion of power transmission and transforming equipment and circuit, adapt to the model of various conventional bolts.
1, stiff end
1), directly cover is pressed on the fastening bolt of power transmission and transforming equipment and connection contact, also can prevent that fastening bolt from becoming flexible and corrosion.
2), through conducting strip, be crimped on each connecting portion, easily change wire Electric Field Distribution around and cause corona.
2, masked segment
1), betal can shielding construction, there is shield effectiveness good, sturdy and durable, seal good, therefore adopt stainless steel or Al-alloy metal housing shroud.
2), use under glass fibre screening can mode temperatures involved easily agingly, easily cause line fault.
3, CT fixed part
1), while using, according to wire type, design the pincerlike fixation of C T of satisfactory open type on power transmission and transformation line, fixing reliable, installation and removal are convenient.
2), while using, can design satisfactory bolted bus bar formula open C T according to field condition needs on power transmission and transforming equipment, for illuminated temperature-sensitive cap power taking, use.
Selected scheme: temperature-sensitive cap adopts bolt to be fixedly connected with mode, betal can shielding mode, adopts the pincerlike fixation of C T of open type.
Comprehensive above analysis, preferred technical scheme is:
1, utilize CT on power equipment, to respond to power taking technology, for temperature-sensitive cap provides reliable source of power; Utilizing CT on power equipment, to respond to power taking technology is called again: high pressure self-supplying power source.
2, adopt the temperature measurement fraction of thermistor, supply voltage comparer, super bright dual-colored LED pilot lamp fabrication of electronic components temperature-sensitive cap, make temperature-sensitive cap possess the indication of the luminous and luminescence alarm of early warning, by wireless launcher, the power transmission and transforming equipment contact temperature information exchange of temperature-sensitive cap monitoring is crossed to network and Surveillance center carries out communication, thus make maintainer more promptly and accurately know power transmission and transforming equipment contact temperature.To maintainer, facilitate.
3, temperature-sensitive cap is arranged on the fastening bolt of power transmission and transforming equipment contact, adopts betal can shielding construction, and according to wire characteristic and model scope, uses open type forceps type structure CT.Metal shell has higher electromagnetic screen ability simultaneously.
Temperature measurement fraction can be realized sound and light alarm by built-in alarm, and built-in wireless transmitter module is realized the temperature of the power transmission and transforming equipment contact detecting is carried out wirelessly carrying out communication with monitoring center.Slightly do change and adopt the wired modes such as power line carrier to carry out communication, effectively guarantee the timely, efficient of maintenance.
Principle of work of the present invention:
The illuminated temperature-sensitive cap of power transmission and transforming equipment contact system is passed through thermistor, thermistor is connected with supply voltage comparator input terminal, supply voltage comparator output terminal connects luminous prior-warning device, supply voltage comparer is two, the luminous indication supply voltage of the corresponding early warning of difference comparer, luminescence alarm indication supply voltage comparer, and two supply voltage comparers are arranged respectively to supply voltage comparator input terminal early warning temperature threshold and alarm threshold value, when temperature raises, thermistor resistance reduces, the luminous indication supply voltage of early warning comparator input terminal magnitude of voltage changes thereupon, when temperature reaches early warning temperature threshold, supply voltage comparer output level changes, the conducting of green LED indicator light circuit, shown in green early-warning lamp, when temperature continue to raise, reach alarm threshold value and when above, thermistor resistance continues to diminish, green early-warning lamp is closed, and red alarm lamp is bright.
Otherwise the power transmission and transforming equipment contact temperature that thermistor detects declines, resistance raises, and when temperature, is down to alarm threshold value when following, and red alarm lamp is closed.When detected temperatures reaches early warning temperature threshold and alarm threshold value interval, green early-warning lamp lights again.Temperature drops to early warning temperature threshold when following, and green early-warning lamp is closed.Thereby, realize the temperature monitoring to power transmission and transforming equipment and connection contact.In conjunction with necessary sound and light alarm and video monitoring and communication module, can realize sound and light alarm and observed temperature has been reached to early warning or alarm condition and Surveillance center and carry out communication, realize remote monitoring power transmission and transforming equipment contact situation.
Beneficial effect of the present invention:
1, to power equipment connecting portion detection excess temperature situation promptly and accurately, excess temperature continuous effective monitoring rate is reached to 100%, the line tripping accident that could effectively prevent device damage that excess temperature causes and burning apparatus to cause, dwindle excess temperature to the degree of damage of equipment and scope, the accident prevention that excess temperature is caused plays positive key effect.
Adopt independent circuits monitor temperature, be subject to ectocine little.According to different temperatures control circuit, show different colored lights, monitor temperature is accurately, stable performance, practical function be obvious.
2, in substation transformer crimping copper bar connecting portion, 10kV mother copper bar connecting portion, 10kV switch cubicle, use monitor temperature, more convenient, the heating situation of judgement outlet cable promptly and accurately.
3, illuminated temperature-sensitive cap is all convenient to each connecting portion heat generating spot to observe night on daytime.
4, long service life, can reuse for a long time, and provisional excess temperature can recover automatically without line outage.
The benefit that the present invention obtains
1, the safety benefit that the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system is brought:
(1) illuminated temperature-sensitive cap can effectively prevent, because of the heating problem that circuit overload generates heat and hold-down bolt is loosening and harmonic current increase causes, to reduce the tripping operation number of times that power transmission and transforming equipment causes because of heating initiating failure.
(2) early warning that can make according to the green early-warning lamp of illuminated temperature-sensitive cap, reasonably formulates maintenance and the plan that has a power failure in advance to heating circuit.Avoid peak times of power consumption power off time, effectively reduce equipment power off time.
(3) for the circuit of illuminated temperature-sensitive cap red alarm, make in time repairing, effectively avoid because of the infringement of long-term fever to power transmission and transforming equipment and circuit initiation.
(4) reduced cost of equipment maintenance, improved power supply reliability, increased company social benefit, optimized corporate image.
2, economic benefit
The line fault number of times causing by reducing long-term fever, has reduced power network line maintenance cost, has reduced line tripping power off time:
Because the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system has accomplished to give warning in advance, can effectively avoid the energy loss and the economic loss that cause because of power failure trip accident that heating causes, guaranteed electric power netting safe running.
Along with social progress, power load rapid growth, and carrying out of power transmission and transformation equipment state overhauling work under the new situation, proposed new higher requirement to the safe operation of power transmission and transforming equipment, maintenance, therefore just need to constantly carry out technical renovation.By 3G wireless network transmissions, realize the on-line monitoring to power transmission and transforming equipment, improve power supply reliability, guarantee the safe operation of electrical network.
Accompanying drawing explanation
Fig. 1 is high pressure self-supplying power source device circuit schematic diagram,
Fig. 2 is the illuminated temperature-sensitive cap of power transmission and transforming equipment contact circuit system structural representation,
Fig. 3 is induction power taking part electromagnetic induction principle figure,
Fig. 4 is the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system schematic,
Fig. 5 is that employing single-chip microcomputer is processor circuit temperature-sensitive cap circuit system structural representation.
Wherein, 101. flat ripple reactance, 102 full-wave rectification bridges, 103. electric capacity of voltage regulation, 104. voltage protection circuit, 105.LC filtering circuit, 106.DC-DC module, 107. current-limiting resistance, 201. high pressure self-supplying power source transformer iron core coils, 202. supply unit, 204. line of electric force, 301. magnetic induction line, 302. electric field line, the illuminated temperature-sensitive cap of 401. power transmission and transforming equipment contact, 402. thermistor, 403. comparer I, 404. comparer II, 405.LED pilot lamp, 406 wireless transmitter modules, 407. wireless receiving module, 408. Surveillance center, 501. temperature-sensitive cap screening cans, 502. fastening end, 503. internal thread counterbores, 601. single-chip microcomputer.
Embodiment
Below in conjunction with accompanying drawing and embodiment, invention is described further.
Embodiment 1: in Fig. 1, represented high pressure self-supplying power source device circuit schematic diagram.
CT directly induces alternating voltage from primary current; after flat ripple reactance 101 adopting full-wave rectification bridge 102 to change; on electric capacity of voltage regulation 103, obtain pressing compared with galvanic current; switch on again voltage protection circuit 104, filtering circuit 105 and DC-DC module 106 and current-limiting resistance 107 is transformed into the power supply of 3.3V, for electronic circuit in the illuminated temperature-sensitive cap 401 of power transmission and transforming equipment contact.Under CT degree of depth state of saturation, induced voltage and induction current all significantly rise, and the position between CT and full-wave rectification bridge 102 adds after flat ripple reactance, can share the high voltage of most CT inductions, and limit the electric current output of CT.Voltage protection circuit carries out protectiveness energy to superpotential and releases.Ensure subsequent conditioning circuit safety.
In Fig. 2, the illuminated temperature-sensitive cap of a kind of power transmission and transforming equipment contact system, it comprises supply unit 202, the illuminated temperature-sensitive Mao401, of power transmission and transforming equipment contact Surveillance center 408, described supply unit 202 is electrically connected to the illuminated temperature-sensitive cap 401 of power transmission and transforming equipment contact, the illuminated temperature-sensitive cap 401 of described power transmission and transforming equipment contact comprises wireless transmitter module 406, and described wireless transmitter module 406 is by network and 407 communications of Surveillance center's wireless receiving module; The illuminated temperature-sensitive cap 401 of described power transmission and transforming equipment contact also comprises fixing and masked segment and temperature measurement fraction, and described temperature measurement fraction is arranged in fixing and masked segment, is provided with luminous prior-warning device in temperature measurement fraction.
Describedly fixing comprise fastening end 502 and temperature-sensitive cap screening can 501 with masked segment, be milled with flatly on 502 sidewalls of described fastening end, lower surface is provided with internal thread counterbore, the fastening bolt immovable fitting of internal thread counterbore 503 and power transmission and transforming equipment contact; 503 upper surfaces, fastening end and temperature-sensitive cap screening can 501 bottoms connect as one, and described temperature-sensitive cap screening can 501 is stainless steel casing or aluminum alloy casing or glass fibre shell; On the sidewall of described stainless steel casing or aluminum alloy casing or glass fibre shell, all directions direction is respectively equipped with a hole, and described luminous prior-warning device coordinates installation with hole.
Described supply unit is high pressure self-supplying power source mode, is included in the high pressure self-supplying power source transformer iron core coil 201 of responding to power taking on power equipment, described high pressure self-supplying power source mutual inductor is open type forceps type structure CT or bolted bus bar formula open C T, described Current Transmit primary side carries out electromagnetic coupled induction by open type forceps type structure or bolted bus bar formula with power equipment circuit and is connected, Current Transmit secondary side is connected with flat ripple reactance 101, flat ripple reactance 101 is connected with full-wave rectification bridge 102, full-wave rectification bridge 102 output terminals and electric capacity of voltage regulation 103, voltage protection circuit 104, LC filtering circuit 105 and DC-DC module 106, current-limiting resistance 107 connects successively, current-limiting resistance 107 is connected with the illuminated temperature-sensitive cap 401 of power transmission and transforming equipment contact.
Described temperature measurement fraction comprises thermometric sensing circuit; Processor circuit and luminous prior-warning device; Described thermometric sensing circuit, processor circuit and luminous prior-warning device are electrically connected to successively; Described thermometric sensing circuit comprises temperature probe, and described temperature probe is thermistor 402 or thermojunction type temperature controller or semiconductor integrated temperature sensor.
Described processor circuit comprises comparer, and described comparer is two, is respectively comparer I 403, comparer II 404; Two comparers are divided the work, and complete respectively and reach between 70 ℃～90 ℃ when temperature, and comparer I403 output level changes, green LED pilot lamp 405 circuit turn-ons, shown in green early-warning lamp; When temperature continues to raise over 90 ℃, thermistor 402 resistances continue to diminish, and green early-warning lamp is closed, comparer II 404 outputs, and red alarm lamp is bright.Two comparers and same set of thermistor 402 or thermojunction type temperature controller or semiconductor integrated temperature sensor are connected, two comparator output terminals are connected with luminous prior-warning device series system with wireless transmitter module, and described comparer is MAX965 supply voltage comparer.The wireless transmitter module 406 that utilization is provided with by network by green alert status, red alarm state is transmitted into Surveillance center 408, Surveillance center's wireless receiving module 407 receives, staff is according to the contact temperature situation of knowing, take necessary workflow, to there is the power transmission and transforming equipment contact of overtemperature, process in time.
Described luminous prior-warning device comprises LED light 405, and described LED light 405 is super bright dual-colored LED pilot lamp, described double-colored be green and red; Described super bright dual-colored LED pilot lamp is connected with processor circuit and is fixed in the hole that temperature-sensitive cap screening can sidewall is provided with.
Between described temperature probe and fixing and masked segment, be provided with heat-conducting glue.
Described supply unit adopts dry battery type power supply or solar cell.
Described network comprises GSM/GPRS/CDAM/3G network.
Fig. 3 represents to utilize inductive coil power taking, at line of electric force 204, have electric field line 302 around, under the electric field of periodicity alternation, produce magnetic induction line 301, be positioned at the high pressure self-supplying power source transformer iron core coil 201 of magnetic induction line 301 zones of action by the magnetic induction line sensing 301, produce induced potential, by closed-loop path, produce induced current, it is the principle of CT, the electric field that the electric current that cycle changes can change in the generation cycle, the magnetic field that the electric field that the cycle changes can change in the generation cycle, vice versa.
The illuminated temperature-sensitive cap of a kind of power transmission and transforming equipment contact of Fig. 4 system, fixing and masked segment comprises fastening end 502 and temperature-sensitive cap screening can 501, on 502 sidewalls of described fastening end, be milled with flat, lower surface is provided with internal thread counterbore 503, the fastening bolt immovable fitting of heavy 503 holes of internal thread and power transmission and transforming equipment contact; Upper surface, fastening end and temperature-sensitive cap screening can bottom connect as one, and described temperature-sensitive cap screening can 501 is stainless steel casing or aluminum alloy casing or glass fibre shell; On the sidewall of described stainless steel casing or aluminum alloy casing or glass fibre shell, be provided with at least one hole;
Supply unit is high pressure self-supplying power source mode, is included in the Current Transmit of responding to power taking on power equipment; Described Current Transmit is open type forceps type structure CT or bolted bus bar formula open C T, and described Current Transmit primary side carries out electromagnetic coupled induction by open type forceps type structure or bolted bus bar formula with power equipment circuit and is connected,
(temperature-measuring range is at-50 ℃～+ 300 ℃ by thermistor 402 for the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system, there is higher sensitivity), thermistor 402 is connected with supply voltage comparator input terminal, supply voltage comparator output terminal connects light early warning part, and its resistance value has varied with temperature significant variation.When temperature raises, thermistor 402 resistances reduce, affect thus supply voltage comparator input terminal magnitude of voltage, it is 70 ℃ that early warning temperature threshold is set, when temperature reaches between 70 ℃～90 ℃, supply voltage comparer output level changes, green LED pilot lamp 405 circuit turn-ons, shown in green early-warning lamp; Utilize the wireless transmitter module being provided with that green alert status is transmitted into Surveillance center simultaneously, when temperature continues to raise over 90 ℃, thermistor 402 resistances continue to diminish, the interaction by comparer to input end, green early-warning lamp is closed, and red alarm lamp is bright.The most succinct is to adopt between comparer to be mutually independent and to work alone, and reaches the object of utilizing photoelectricity indicating mode to indicate power transmission and transforming equipment contact temperature.
Utilize the wireless transmitter module being provided with that red alarm state is transmitted into Surveillance center, otherwise the power transmission and transforming equipment contact temperature that thermistor 402 detects declines, resistance raises simultaneously, and when temperature is down to below 90 ℃, red alarm lamp is closed.Detected temperatures reaches 70 ℃～90 ℃ when interval, and green early-warning lamp lights again.Temperature drops to 70 ℃ when following, and green early-warning lamp is closed.Thereby, realize the temperature monitoring to power transmission and transforming equipment and connection contact.Staff, according to the contact temperature situation of knowing, takes necessary workflow, to there is the power transmission and transforming equipment contact of overtemperature, processes in time.
Temperature measurement fraction is formed by MAX965 supply voltage comparer system, and MAX965 supply voltage comparer is professional voltage source voltage comparator, and switch speed is fast, time delay is little, has low current, little encapsulation, turn-off function.Whole system is comprised of MAX965 supply voltage comparer and thermistor 402 temperature controllers and other auxiliary electron element.
Make the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system blank in kind, debugging test.Analog operation state is tested the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system:
1, during excess temperature, the green early-warning lamp of illuminated temperature-sensitive cap is bright, red alarm lamp is bright by test;
2,, during excess temperature, green early-warning lamp, red alarm lamp brightness radiation radius are 50 meters;
3, high pressure self-supplying power source device can be installed easily, dismantle, and device bayonet socket can fixedly secure on power transmission and transforming equipment and circuit; Operating voltage 500kV and following, working current 5～1800A;
4, excess temperature early warning range is set in 70 ℃～90 ℃ intervals, and overtemperature alarm scope is set in more than 90 ℃, and during 140 ℃ of excess temperatures, equipment operation is stable.
5, the wireless transmitter module that utilization is provided with is by green alert status, and red alarm state is transmitted into Surveillance center, and staff, according to the contact temperature situation of knowing, takes necessary workflow, to there is the power transmission and transforming equipment contact of overtemperature, processes in time.
Effect checks
(1) target inspection
(1) analog operation state carries out the record of withstand voltage test and test figure.
Simulated field carries out to 10 the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system blanks the AC voltage withstand test that 10kV, 35kV, 110kV, tetra-electric pressures of 220kV add respectively 35kV, 78kV DC break down voltage, 149kV, 246kV, device housings tool and high pressure self-supplying power source device have higher electromagnetic screen ability, guarantee reliable insulation over the ground.
Withstand voltage test qualification rate statistical form
(2) analog operation state carries out the record of luminous, heat run and test figure.
Simulation excess temperature situation is carried out luminous, heat run detection to 10 the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system blanks, tests luminosity factor and the temperature triggered of illuminated temperature-sensitive cap and closes rate.
The luminosity factor statistical form of the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system
By temperature triggered qualification rate, test, find triggering temperature 0.5 degree on the low side of the illuminated temperature-sensitive cap of 2#.Look into its reason, disassembled to open while carrying out temperature measurement fraction heat run more separately and find, it is qualified that the thermometric of temperature measurement fraction triggers, and observes masked segment and see while assembling having bubble in heat-conducting glue, causes assembling rear thermometric and trigger inaccurate.By heat run, detect, we recognize the importance of assembling process.Re-assembly rear thermometric triggering qualified, make the temperature triggered qualification rate of illuminated temperature-sensitive cap reach 100%.
(3) out-put supply of high pressure self-supplying power source device part under different electric pressures is stable, exporting enough power can be for the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system, long-term work is at low hear rate state, during system index primary current 5～600A, system stability output power is 1W, and insulation is over the ground reliable.
High pressure self-supplying power source device power taking effect table
From above test, find out, ten the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system test conclusions are qualified, possessed under various external environments, effectively thermometric rate has reached 100%, thermometric temperature rate of accuracy reached is to 100%, different electric pressure relevance factors reach 100%, and supply unit can be realized uninterrupted stable electric power supply.Reached the design object of expection.
In sum, illuminated temperature-sensitive cap all technical meets design object, the success of the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system development.
(2) obtain benefit
1, the safety benefit that the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system is brought:
(1) illuminated temperature-sensitive cap can effectively prevent, because of circuit overload heating and the loosening heating problem causing of hold-down bolt, to reduce the tripping operation number of times that power transmission and transforming equipment causes because of heating initiating failure.
(2) early warning that can make according to the green early-warning lamp of illuminated temperature-sensitive cap, reasonably formulates maintenance and the plan that has a power failure in advance to heating circuit.Avoid peak times of power consumption power off time, effectively reduce equipment power off time.
(3) for the circuit of illuminated temperature-sensitive cap red alarm, make in time repairing, effectively avoid because of the infringement of long-term fever to power transmission and transforming equipment and circuit initiation.
(4) reduced cost of equipment maintenance, improved power supply reliability, increased company social benefit, optimized corporate image.
2, economic benefit
The line fault number of times causing by reducing long-term fever, has reduced power network line maintenance cost, has reduced line tripping power off time:
To cause that because of long-term fever fault the power off time that line tripping causes calculates for 6 hours
Q＝UITcos∮＝10kV*300A*0.98*6h＝17640kwh
Increase electricity sales amount the year same period approximately: (take 1 year because of long-term fever fault cause that line tripping is as 8 calculating)
Article 8, time * 17640kwh=14.112w ten thousand kwh
The cost of making the illuminated temperature-sensitive cap of a power transmission and transforming equipment contact system is 100 yuan, and 8 circuits calculate with 30 temperature-sensitive caps, and cost is 50 yuan * 30=3000 yuan
Directly increase-0.3 ten thousand yuan=7.27 ten thousand yuan/year, economic benefit approximately 14.112 ten thousand kwh*0.5469 unit
Because the illuminated temperature-sensitive cap of power transmission and transforming equipment contact system has accomplished to give warning in advance, can effectively avoid the energy loss and the economic loss that cause because of power failure trip accident that heating causes, guaranteed electric power netting safe running.
Along with social progress, power load rapid growth, and carrying out of power transmission and transformation equipment state overhauling work under the new situation, proposed new higher requirement to the safe operation of power transmission and transforming equipment, maintenance, therefore just need to constantly carry out technical renovation.By 3G wireless network transmissions, realize the Always Online" monitoring to power transmission and transforming equipment, improve power supply reliability, guarantee the safe operation of electrical network.
In Fig. 5, be embodiment 2, described processor circuit comprises single-chip microcomputer 601, adopts conventional MCS51 Series MCU, and miscellaneous part annexation is referring in Fig. 2, and this is no longer going to repeat them.
Although above-mentioned, by reference to the accompanying drawings the embodiment of invention is described; but the not restriction to invention protection domain; one of ordinary skill in the art should be understood that; on the basis of technical scheme of invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in the protection domain of invention.
Claims (9)
1. the illuminated temperature-sensitive cap of a power transmission and transforming equipment contact system, it is characterized in that, it comprises supply unit, the illuminated temperature-sensitive Mao, of power transmission and transforming equipment contact Surveillance center, described supply unit is electrically connected to the illuminated temperature-sensitive cap of power transmission and transforming equipment contact, the illuminated temperature-sensitive cap of described power transmission and transforming equipment contact comprises wireless transmitter module, and described wireless transmitter module is by network and Surveillance center's wireless receiving module communication; The illuminated temperature-sensitive cap of described power transmission and transforming equipment contact also comprises fixing and masked segment and temperature measurement fraction, and described temperature measurement fraction is arranged in fixing and masked segment, is provided with luminous prior-warning device in temperature measurement fraction; Describedly fixing comprise fastening end and temperature-sensitive cap screening can with masked segment, be milled with flatly on the sidewall of described fastening end, lower surface is provided with internal thread counterbore, the fastening bolt immovable fitting of internal thread counterbore and power transmission and transforming equipment contact; Upper surface, fastening end and temperature-sensitive cap screening can bottom connect as one, and described temperature-sensitive cap screening can is stainless steel casing or aluminum alloy casing or glass fibre shell; On the sidewall of described stainless steel casing or aluminum alloy casing or glass fibre shell, be provided with at least one hole, described luminous prior-warning device coordinates installation with hole.
2. the illuminated temperature-sensitive cap of power transmission and transforming equipment contact as claimed in claim 1 system, is characterized in that, described supply unit is high pressure self-supplying power source mode, is included in the high pressure self-supplying power source transformer iron core coil of responding to power taking on power equipment, described high pressure self-supplying power source mutual inductor is open type forceps type structure Current Transmit or bolted bus bar formula opening Current Transmit, described Current Transmit primary side carries out electromagnetic coupled induction by open type forceps type structure or bolted bus bar formula with power equipment circuit and is connected, Current Transmit secondary side is connected with flat ripple reactance, flat ripple reactance is connected with rectifier bridge, rectification bridge output end and electric capacity of voltage regulation, voltage protection circuit, LC filtering circuit and DC-DC module, current-limiting resistance connects successively, current-limiting resistance is connected with the illuminated temperature-sensitive cap of power transmission and transforming equipment contact.
3. the illuminated temperature-sensitive cap of power transmission and transforming equipment contact as claimed in claim 2 system, is characterized in that, described temperature measurement fraction comprises thermometric sensing circuit; Processor circuit and luminous prior-warning device; Described thermometric sensing circuit, processor circuit and luminous prior-warning device are electrically connected to successively; Described thermometric sensing circuit comprises temperature probe, and described temperature probe is thermistor or thermojunction type temperature controller or semiconductor integrated temperature sensor.
4. the illuminated temperature-sensitive cap of a power transmission and transforming equipment contact as claimed in claim 3 system, is characterized in that, described processor circuit comprises single-chip microcomputer, and described single-chip microcomputer is connected with wireless transmitter module; Described single-chip microcomputer is also connected with thermistor or thermojunction type temperature controller or semiconductor integrated temperature sensor and luminous prior-warning device respectively.
5. the illuminated temperature-sensitive cap of a power transmission and transforming equipment contact as claimed in claim 3 system, it is characterized in that, described processor circuit comprises comparer, described comparer is two, two comparers with same set of or two independently thermistor or thermojunction type temperature controller or semiconductor integrated temperature sensor are connected, two comparator output terminals are connected with luminous prior-warning device with wireless transmitter module, and described comparer is MAX965 supply voltage comparer.
6. the illuminated temperature-sensitive cap of a power transmission and transforming equipment contact as claimed in claim 3 system, it is characterized in that, described luminous prior-warning device comprises LED light, and described LED light is super bright dual-colored LED pilot lamp or common LED pilot lamp, described double-colored be green and red; Described LED light is connected with processor circuit and is fixed in the hole that temperature-sensitive cap screening can sidewall is provided with.
7. the illuminated temperature-sensitive cap of a power transmission and transforming equipment contact as claimed in claim 3 system, is characterized in that, between described temperature probe and fixing and masked segment, is provided with heat-conducting glue.
8. the illuminated temperature-sensitive cap of a power transmission and transforming equipment contact as claimed in claim 1 system, is characterized in that, described supply unit adopts dry battery type power supply or solar cell.
9. the illuminated temperature-sensitive cap of a power transmission and transforming equipment contact as claimed in claim 1 system, is characterized in that, described network comprises GSM/GPRS/CDAM/3G network.
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| CN201210101278.9A CN102607733B (en) | 2012-04-09 | 2012-04-09 | Electric transmission and transformation equipment contact luminous temperature sensing cap system |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103017930A (en) * | 2012-12-14 | 2013-04-03 | 山东电力集团公司菏泽供电公司 | Transformer substation secondary equipment temperature collecting device |
| CN103728039A (en) * | 2013-11-15 | 2014-04-16 | 成都市宏山科技有限公司 | Busbar temperature rise warning detection device based on thermocouple |
| CN104779528A (en) * | 2015-04-14 | 2015-07-15 | 宁波宁通电气成套有限公司 | Intelligent high-voltage switch cabinet |
| CN107229300B (en) * | 2017-08-01 | 2022-07-22 | 任宝泉 | Automatic temperature controller for greenhouse air release machine |
| CN110579290A (en) * | 2019-09-05 | 2019-12-17 | 西人马（厦门）科技有限公司 | Temperature measuring device and electric power system |
| CN110779636A (en) * | 2019-10-31 | 2020-02-11 | 江苏量为石科技股份有限公司 | Temperature measuring device for power transmission system |
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| CN202511918U (en) * | 2012-04-09 | 2012-10-31 | 济南市历城区供电公司 | Lighting thermal cap system of contact point of electric transmission and transformation equipment |
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| JP2005100164A (en) * | 2003-09-25 | 2005-04-14 | Ntn Corp | Wireless sensor system and bearing device with wireless sensor |
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| CN1812227A (en) * | 2005-01-24 | 2006-08-02 | 谢东阳 | Remote monitoring terminal for high-voltage power line |
| CN201673587U (en) * | 2010-04-19 | 2010-12-15 | 北京国电力成科技有限公司 | Operating temperature monitor for high-voltage equipment |
| CN201993905U (en) * | 2011-04-07 | 2011-09-28 | 云南电力试验研究院(集团)有限公司 | ZigBee network-based temperature online monitoring and early-warning system |
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