CN202305052U - On-line temperature monitoring device of transmission line - Google Patents
On-line temperature monitoring device of transmission line Download PDFInfo
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- CN202305052U CN202305052U CN2011203546442U CN201120354644U CN202305052U CN 202305052 U CN202305052 U CN 202305052U CN 2011203546442 U CN2011203546442 U CN 2011203546442U CN 201120354644 U CN201120354644 U CN 201120354644U CN 202305052 U CN202305052 U CN 202305052U
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- transmission line
- lead
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Abstract
An on-line temperature monitoring device of a transmission line is characterized by comprising a shielding shell and a section of reference lead, wherein the shielding shell is internally provided with a wireless transceiver and a power module; the reference lead has the same model with the lead of the transmission line and is parallel to the lead of the transmission line; the reference lead and the lead of the transmission line penetrate through the shielding shell; a plurality of temperature sensors are arranged on the reference lead and the lead of the transmission line in the shielding shell; the temperature sensors are electrically connected with the wireless transceiver through data lines; and the power module supplies power to the wireless transceiver by getting power from a transmission conductor. The on-line temperature monitoring device has a simple structure, is used simply and conveniently, and transmits temperature data through the wireless transceiver, thereby realizing long-distance detection; and the shielding shell can play a role in preventing corona from influencing the normal work of the internal components of the device.
Description
Technical field
The utility model relates to a kind of temperature monitoring equipment, especially relates to a kind of on-line temperature monitoring device of transmission line of electricity.
Technical background
For the overhead power transmission circuit, its allow environment weather condition such as operation current-carrying capacity and ambient wind velocity, wind direction, environment temperature, ambient humidity and radiation at sunshine and with the physical property of the leads such as diameter, newness degree and resistance of lead itself relevant.China is in the design overhead transmission line; Be the permission current-carrying capacity that comes computational scheme according to abominable meteorological condition very, so extreme meteorological conditions such as promptly fine (40 ℃ of environment temperatures), wind speed low (mean wind speed 0.5m/s), sun direct projection are calculated.But in fact, seldom though this conservative computing method can be the temperature limitation of lead operation in safe range, safe distance is enough big over the ground thereby guarantee aerial condutor the time that extreme like this weather conditions occur; But when meteorological condition is in generalized case rather than harsh conditions following time; Circuit still moves by the permission current-carrying capacity of extreme meteorological condition design; What can slattern a part of transmission line of electricity send electric energy power, and this is because circuit permission current-carrying capacity in the ordinary course of things is bigger than the current-carrying capacity under extreme meteorological condition.When computing electric power line allows current-carrying capacity, generally use the thermal equilibrium formula,, MC wherein
pBe the specific heat capacity of lead, T
cBe conductor temperature, t is the time, I
2R (T
c) be the heating power of lead, Q
sBe radiation heat absorption at sunshine, Q
cBe heat loss through convection, Q
rIt is the heat loss through radiation of lead.When transmission line of electricity reaches the thermal equilibrium stable state, dT
c/ dt=0.
Obtaining of radiation at sunshine, a kind of method is through getting definite value or considering that the factors such as position angle, sea level elevation and geographic position of altitude of the sun, solar azimuth, circuit remove to calculate intensity of sunshine.And then further obtain radiant quantity Q at sunshine
sBut this method draws just fine or sunshine, the strongest intensity of sunshine constantly differed very big with actual conditions, when running into rainy weather, this as a result value (intensity of sunshine is 0.1W/cm with regard to inaccurate
2).Another kind method is exactly to utilize the sunshine radiation sensor to obtain real-time intensity of sunshine; But the shortcoming of this method also clearly, too relies on the radiation sensor at sunshine, when sensor fault, will influence obtaining of real-time weather data, and then influence the calculating that transmission line of electricity allows current-carrying capacity.
The utility model content
The utility model technical matters to be solved; Just provide a kind of on-line temperature monitoring device of transmission line of electricity; It need not the radiation sensor at sunshine, obtains real time temperature data accurately through direct measurement transmission pressure and reference conductor temperature, through calculating obtain real-time sunshine radiant quantity and meteorological condition to the influence of lead heat loss through convection.
The technical matters of the utility model solves through following technical scheme:
A kind of on-line temperature monitoring device of transmission line of electricity is characterized in that comprising:
One screening can, in be provided with wireless transceiver and power module;
One section reference conductor that the wire type with transmission line of electricity is consistent, direction is parallel;
The lead of described reference conductor and transmission line of electricity passes described screening can; And be provided with a plurality of temperature sensors on the reference conductor in screening can and the lead of transmission line of electricity; Each temperature sensor is electrically connected with data line with described wireless transceiver, and described power module can be given described wireless transceiver power supply through getting from transmission pressure.
Described screening can is square, is made up of two parts up and down, in the time of installation, with the web member combination integral body of formation that is fixed together.
Be provided with two parallel wire casings in the described screening can, so that hold the lead of reference conductor and transmission line of electricity.
The lead of described reference conductor and transmission line of electricity is fixed on two wire casings with fixing larynx hoop respectively.
The tapping that the lead of described reference conductor and transmission line of electricity passes shell is provided with packing ring.
The lead usefulness of described reference conductor and transmission line of electricity fixedly support arm fixes the relative position between two leads, makes both parallel, and fixedly the two ends of support arm are provided with an armlet and are used for fixing lead.
The utility model is through adding one section reference conductor (the reference conductor model is consistent with transmission pressure), and reference conductor is with the residing environmental facies of transmission pressure are same, newness degree is identical, surface aging is identical, and reference conductor and transmission pressure parallel.Because reference conductor is consistent with the various conditions of transmission pressure, so their unit caloric receptivity at sunshine can equate.Utilize the temperature variation of the real-time witness mark lead of temperature sensor, can draw Transient Thermal balance equation relevant for reference conductor; Use Transient Thermal balance equation and steady-state heat balance equation to confirm the real-time permission current-carrying capacity of transmission pressure to transmission pressure more at last.This method can be removed the use of radiation sensor at sunshine from; Simultaneously also can calculate intensity of sunshine and heat transfer coefficient according to the meteorological condition of reality; Help overcoming and adopt conservative intensity of sunshine value and adopt the sun altitude intensity of sunshine to calculate that current-carrying capacity brought and errors actual conditions; When both being applicable to fine day, be applicable to that also the permission current-carrying capacity when overcast and rainy calculates.
Beneficial effect: this apparatus structure is reasonable, and is easy to use, carries out the temperature data transmission through wireless transceiver, thereby reaches remote detection, and screening can play the effect of corona to the influence of device internal components operate as normal that prevent.
Description of drawings
Fig. 1 is the utility model embodiment 1 synoptic diagram;
Fig. 2 is the utility model embodiment 2 synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further explanation:
As shown in Figure 1; The instance one of the utility model is installed on the lead on the transmission line of electricity that needs dynamic compatibilization and temperature detection; Present embodiment comprises the reference conductor consistent with the wire type of transmission line of electricity, that direction is parallel 1, transmission pressure to be measured 2, square screening can 3, power module 4, temperature sensor 5, wireless transceiver 6, fixedly support arm 7, support arm set collar 8, wire casing 9, fixedly larynx hoop 10, packing ring 11; Wherein, Reference conductor 1 and transmission pressure 2 to be measured are fixed on two wire casings 9 with fixing larynx hoop 10 respectively; Together pass square screening can 3 and packing ring 11, install earlier fixedly an end and an armlet 8 of support arm 7 at the two ends of reference conductor 1 respectively, and then combine the other end of support arm 7 and an armlet 8 and transmission pressure 2 to be measured; The relative position of fixed reference lead 1 and transmission pressure 2, and both are paralleled.A plurality of temperature sensors 5 are placed on respectively on two wire casings 10, with the surface of reference conductor 1 and transmission pressure 2 to be measured sufficient the contact are arranged all.Power module 4 is arranged on the below of transmission pressure 2 to be measured.Each temperature sensor 5 links to each other with wireless transceiver 6.Wireless transceiver 6 is sent near the place, reception base station the electric power line pole tower to data.
Square screening can also has anticorona effect, the normal operation of protective device internal electronic element.
Support arm is processed by compound substance, makes the reference conductor no power, and power module is installed in the square screening can, through the lead power taking, for the normal operation of holdout device is supplied power.
Shown in Fig. 2, embodiment two comprises reference conductor 1, transmission pressure to be measured 2, square screening can 3, assembling bolt 12.Described square screening can 3 is made up of two parts up and down, in the time of installation, makes up the integral body of formation that is fixed together with combined screw 12.
The reference conductor of the utility model is equivalent between two shaft towers, set up a cold parallel wire; Its model, newness degree are the same; Meteorological conditions such as the wind speed in the residing atmospheric environment, wind direction, environment temperature, humidity are identical; The radiant quantity at sunshine that unit length absorbs equates, thus can be simultaneously the temperature value of witness mark lead and transmission pressure constantly.The temperature of reference conductor is influenced by the factors such as wind speed and direction humidity sunshine in the weather environment, and the temperature of transmission pressure is except receiving meteorological factor of environmental influences, and the heat that the electric current of also being flowed through produces influences.Through recording the temperature that constantly records reference conductor and transmission pressure; Can obtain two thermal equilibrium steady-state equations of reference conductor and transmission pressure; And the composition system of equations, the group of solving an equation can obtain sometime sunshine radiant quantity and weather environment to the lead influential heat loss through convection coefficient that dispels the heat.Obtain after two above-mentioned numerical quantities, again through calculating the permission current-carrying capacity of transmission pressure under this moment environmental impact.The whole calculations is crossed the temperature that only need use temperature sensor measurement reference conductor and transmission pressure; Only both can eliminate that fixedly sunshine, density of radiation was perhaps according to sun elevation angle calculated the limitation of density of radiation at sunshine by conservative value; Also can reduce the use of radiation sensor at sunshine, standard realizes the calculating of transmission line of electricity maximum delivery capacity with going.
Claims (6)
1. the on-line temperature monitoring device of a transmission line of electricity is characterized in that comprising:
One screening can, in be provided with wireless transceiver and power module;
One section reference conductor that the wire type with transmission line of electricity is consistent, direction is parallel;
The lead of described reference conductor and transmission line of electricity passes described screening can; And be provided with a plurality of temperature sensors on the reference conductor in screening can and the lead of transmission line of electricity; Each temperature sensor is electrically connected with data line with described wireless transceiver, and described power module can be given described wireless transceiver power supply through getting from transmission pressure.
2. the on-line temperature monitoring device of transmission line of electricity according to claim 1 is characterized in that: be provided with two parallel wire casings in the described screening can.
3. the on-line temperature monitoring device of transmission line of electricity according to claim 2 is characterized in that: the lead of described reference conductor and transmission line of electricity is fixed on described two parallel wire casings with fixing larynx hoop respectively.
4. the on-line temperature monitoring device of transmission line of electricity according to claim 3, it is characterized in that: the lead of described reference conductor and transmission line of electricity passes described screening can place and is provided with packing ring.
5. the on-line temperature monitoring device of transmission line of electricity according to claim 4, it is characterized in that: described screening can is square, is made up of two parts up and down, with integral body of the fixing formation of web member combination.
6. the on-line temperature monitoring device of transmission line of electricity according to claim 5; It is characterized in that: the lead usefulness of described reference conductor and transmission line of electricity fixedly support arm fixes the relative position between two leads; Make both parallel, fixedly the two ends of support arm are provided with an armlet and are used for fixing lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203546442U CN202305052U (en) | 2011-09-21 | 2011-09-21 | On-line temperature monitoring device of transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203546442U CN202305052U (en) | 2011-09-21 | 2011-09-21 | On-line temperature monitoring device of transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202305052U true CN202305052U (en) | 2012-07-04 |
Family
ID=46373927
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203546442U Expired - Lifetime CN202305052U (en) | 2011-09-21 | 2011-09-21 | On-line temperature monitoring device of transmission line |
Country Status (1)
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| CN (1) | CN202305052U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778619A (en) * | 2012-07-11 | 2012-11-14 | 华北电力大学 | Method for detecting maximum current-carrying capacity of transmission conductor of high-voltage transmission line |
| CN102818643A (en) * | 2012-07-11 | 2012-12-12 | 广东电网公司电力科学研究院 | Dynamic-capacity-expansion environmental temperature measuring method for conductor wire of high-voltage transmission line |
| CN103115643A (en) * | 2013-01-22 | 2013-05-22 | 华南理工大学 | Electric transmission line on-line monitoring system based on distribution-type energy capture |
| TWI461686B (en) * | 2013-10-25 | 2014-11-21 | Univ Nat Taiwan | Thermal prediction method for power transmission lines |
| CN110763349A (en) * | 2019-10-31 | 2020-02-07 | 国网上海市电力公司 | Anti-electromagnetic interference splicing fitting temperature monitoring and positioning device |
-
2011
- 2011-09-21 CN CN2011203546442U patent/CN202305052U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778619A (en) * | 2012-07-11 | 2012-11-14 | 华北电力大学 | Method for detecting maximum current-carrying capacity of transmission conductor of high-voltage transmission line |
| CN102818643A (en) * | 2012-07-11 | 2012-12-12 | 广东电网公司电力科学研究院 | Dynamic-capacity-expansion environmental temperature measuring method for conductor wire of high-voltage transmission line |
| CN102778619B (en) * | 2012-07-11 | 2014-07-09 | 华北电力大学 | Method for detecting maximum current-carrying capacity of transmission conductor of high-voltage transmission line |
| CN103115643A (en) * | 2013-01-22 | 2013-05-22 | 华南理工大学 | Electric transmission line on-line monitoring system based on distribution-type energy capture |
| CN103115643B (en) * | 2013-01-22 | 2016-03-02 | 华南理工大学 | Based on the transmission line online monitoring system that distributed energy obtains |
| TWI461686B (en) * | 2013-10-25 | 2014-11-21 | Univ Nat Taiwan | Thermal prediction method for power transmission lines |
| CN110763349A (en) * | 2019-10-31 | 2020-02-07 | 国网上海市电力公司 | Anti-electromagnetic interference splicing fitting temperature monitoring and positioning device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |