CN203259488U - Measuring system for thermal contact resistance of parallel groove clamp - Google Patents
Measuring system for thermal contact resistance of parallel groove clamp Download PDFInfo
- Publication number
- CN203259488U CN203259488U CN 201320269459 CN201320269459U CN203259488U CN 203259488 U CN203259488 U CN 203259488U CN 201320269459 CN201320269459 CN 201320269459 CN 201320269459 U CN201320269459 U CN 201320269459U CN 203259488 U CN203259488 U CN 203259488U
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- CN
- China
- Prior art keywords
- parallel groove
- groove clamp
- thermal contact
- measuring system
- contact resistance
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Abstract
The utility model provides a measuring system for thermal contact resistance of a parallel groove clamp. The measuring system comprises a voltage regulator, a current booster, a measuring guide wire and a thermocouple temperature detector, wherein the two ends of the measuring guide wire are connected by a to-be-measured parallel groove clamp; the primary side of the voltage regulator is connected with an alternating-current power supply; the secondary side of the voltage regulator is connected at the two ends of the current booster; the current booster is coupled on the measuring guide wire; and the thermocouple temperature detector is respectively connected with the surface of the parallel groove clamp as well as the contact surface of the parallel groove clamp and the measuring guide wire. The measuring system disclosed by the utility model can be used for accurately measuring the thermal contact resistance of the parallel groove clamp, so that the possibility of the parallel groove clamp faults is lowered.
Description
Technical field
The utility model relates to the technical field of transmission line of electricity monitoring, particularly relates to a kind of measuring system of parallel groove clamp thermal contact resistance.
Background technology
Parallel groove clamp is the most a kind of electric power splicing connector of present domestic application, and purpose is to connect two transmission lines of electricity, so that delivery of electrical energy is continued.The overhead transmission line parallel groove clamp is the important component part of high pressure overhead power line, and its safe operation has great importance to power grid security.Overhead transmission line parallel groove clamp and power cable connector all are the weak links in the electric line.The excellent summary of wire clamp quality and wire clamp quality of connection directly affects the safe operation of equipment.
Parallel groove clamp mainly plays fixing and shunting in overhead transmission line.The wire clamp heating is the key character of reflection wire clamp quality and wire clamp quality of connection.When connector temperature surpasses the maximum temperature that transmission line of electricity can bear, will cause the faults such as wire clamp is overheated even on fire, cause the power outage on a large scale of electric power system.The temperature of overhead transmission line parallel groove clamp is the important parameter of reaction wire clamp running status, in actual applications, usually characterizes the wire clamp temperature with slotted line clamp surface temperature.In experiment measuring, but find when wire loads little electric current, the faults such as disconnected thigh and broken string appear in the not high wire that still causes of wire clamp surface temperature, by present research further be the analysis showed that, the factors such as thermal contact resistance is excessive, surface oxidation and running overload are to cause the parallel groove clamp excess Temperature, cause the main cause of wire clamp place fault, and the thermal contact resistance of parallel groove clamp is difficult to measure, and therefore causes easily the wire clamp fault.
The utility model content
Be difficult to measure for the parallel groove clamp thermal contact resistance that exists in the above-mentioned background technology, cause easily the technical matters of wire clamp fault, the utility model provides a kind of measuring system of parallel groove clamp thermal contact resistance, thermal contact resistance that can the Measurement accuracy parallel groove clamp.
A kind of measuring system of parallel groove clamp thermal contact resistance comprises: pressure regulator, current lifting device, measure traverse line and thermocouple temperature measurement instrument; The two ends of described measure traverse line connect by parallel groove clamp to be measured, the primary side of described pressure regulator connects AC power, secondary side is connected to the two ends of described current lifting device, described current lifting device is coupling on the described measure traverse line, and described thermocouple temperature measurement instrument connects respectively the surface of described parallel groove clamp and the surface of contact of described parallel groove clamp and described measure traverse line.
The measuring system of parallel groove clamp thermal contact resistance of the present utility model is provided with pressure regulator, current lifting device, measure traverse line and thermocouple temperature measurement instrument, the two ends of described measure traverse line connect by parallel groove clamp to be measured, the current coupling that described current lifting device produces described pressure regulator is to described measure traverse line, make described measure traverse line and described parallel groove clamp heating up, described thermocouple temperature measurement instrument is measured respectively the surface of described parallel groove clamp and the temperature of the surface of contact of described parallel groove clamp and described measure traverse line, can accurately calculate the thermal contact resistance of described parallel groove clamp according to the difference of above-mentioned two temperature, reduce the probability of wire clamp fault.
Description of drawings
Fig. 1 is the structural representation of the measuring system of the utility model parallel groove clamp thermal contact resistance;
Fig. 2 is the connected mode synoptic diagram of measure traverse line and parallel groove clamp to be measured in the measuring system of the utility model parallel groove clamp thermal contact resistance;
Fig. 3 is the cross sectional representation of parallel groove clamp to be measured and measure traverse line in the utility model;
Fig. 4 is a kind of connected mode synoptic diagram of thermocouple temperature measurement instrument in the measuring system of the utility model parallel groove clamp thermal contact resistance;
Fig. 5 is the structural representation of the unified preferred embodiment of Department of Survey of the utility model parallel groove clamp thermal contact resistance.
Embodiment
See also Fig. 1, Fig. 1 is the structural representation of the measuring system of the utility model parallel groove clamp thermal contact resistance.
The measuring system of described parallel groove clamp thermal contact resistance comprises: pressure regulator 11, current lifting device 12, measure traverse line 13 and thermocouple temperature measurement instrument 14;
The two ends of described measure traverse line 13 connect by parallel groove clamp to be measured, the primary side of described pressure regulator 11 connects AC power, secondary side is connected to the two ends of described current lifting device 12, described current lifting device 12 is coupling on the described measure traverse line 13, and described thermocouple temperature measurement instrument 14 connects respectively the surface of described parallel groove clamp to be measured and the surface of contact of described parallel groove clamp to be measured and described measure traverse line 13.
When measuring the thermal contact resistance of described parallel groove clamp to be measured, described pressure regulator 11 regulation output voltages, 12 pairs of described measure traverse lines 13 of described current lifting device apply measuring current, record the strength of current of described measuring current, the strength of current of described measuring current can read by the modes such as alternating current ammeter are set, and also can calculate by output voltage and the circuitous resistance of described pressure regulator 11.
According to the strength of current of described measuring current, and the AC resistance of described measure traverse line 13, calculate the thermal value of described measure traverse line 13: Φ
1=I
2R
c, wherein, Φ
1Be the thermal value of described measure traverse line, R
cFor described measure traverse line temperature is T
cThe time AC resistance.
Described thermocouple temperature measurement instrument 14 detects the temperature T of the surface of contact that obtains described parallel groove clamp to be measured and described measure traverse line 13
1Surface temperature T with described parallel groove clamp to be measured
3
Thermal value Φ according to described measure traverse line 13
1, described parallel groove clamp to be measured and described measure traverse line 13 the temperature T of surface of contact
1Surface temperature T with described parallel groove clamp to be measured
3, calculate wire clamp thermal contact resistance R according to following formula
2:
The mode that the two ends of described measure traverse line 13 connect by parallel groove clamp to be measured as shown in Figure 2, the two ends of described measure traverse line 13 are stretched into respectively after the wire guide of described parallel groove clamp to be measured, fix by the holding screw of locking described parallel groove clamp to be measured.
In one embodiment, described thermocouple temperature measurement instrument 14 connects respectively the parallel groove clamp described to be measured surface of same xsect and the surface of contact of described parallel groove clamp to be measured and described measure traverse line 13, as shown in Figure 3.Described thermocouple temperature measurement instrument 14 connects respectively 2 points of the same xsect of described parallel groove clamp, detects this temperature of 2, and it is more accurate to make the thermal contact resistance measurement result of described parallel groove clamp.
In another embodiment, described thermocouple temperature measurement instrument 14 comprises two groups of measurement points, every group comprises two measurement points, and described two measurement points of every group connect respectively the surface of described parallel groove clamp to be measured and the surface of contact of described parallel groove clamp to be measured and described measure traverse line 13.As shown in Figure 4, described thermocouple temperature measurement instrument 14 comprises that two groups of measurement points are respectively No. 1, No. 2 measurement points and No. 3, No. 4 measurement points, connect the surface of contact of described parallel groove clamp to be measured and described measure traverse line 13 with the number of being connected described No. 1, described No. 2, No. 4 measurement points connect the surface of described parallel groove clamp to be measured.When obtaining the temperature data of measurement, obtain measurement point No. 1, No. 2, perhaps obtain the temperature data of No. 3, No. 4 measurement points.By the temperature data that two groups of measurement points obtain, can average, avoid stochastic error, make the temperature data of measurement more accurate, improve the accuracy of measurement of thermal contact resistance.
In a preferred embodiment, the measuring system of described parallel groove clamp thermal contact resistance also comprises two reactive-load compensation capacitors, and the two ends of described current lifting device 12 are respectively by ground connection behind the described reactive-load compensation capacitor, as shown in Figure 5.Compensate by the reactive power that produces in the measuring system testing process of described reactive-load compensation capacitor to described parallel groove clamp thermal contact resistance, energy-saving and cost-reducing, improve efficiency.
Further, in the measuring system of described parallel groove clamp thermal contact resistance, described pressure regulator 11, described current lifting device 12 are arranged on indoor, described measure traverse line 13 and described thermocouple temperature measurement instrument 14 are arranged on outdoor, described measure traverse line 13 is erected on the outdoor shaft tower, described measure traverse line 13 wherein one section stretch into 12 couplings of indoor and described current lifting device.By the way, described measure traverse line 13 is erected on the outdoor shaft tower, can simulate the situation when described parallel groove clamp is actual to be used, and makes measurement result more near truth.
Further, the measuring system of described parallel groove clamp thermal contact resistance also comprises processor, and described processor connects described thermocouple temperature measurement instrument 14.Described processor can adopt various computer equipments to realize, such as PC etc., the data that described thermocouple temperature measurement instrument 14 is obtained are in conjunction with the measuring current of described current lifting device 12 couplings, the parameters such as AC resistance of described measure traverse line 13 are calculated the thermal contact resistance of described parallel groove clamp.
In the measuring system of described parallel groove clamp thermal contact resistance, described thermocouple temperature measurement instrument 14 is preferably T-shaped thermocouple temperature measurement instrument.Described measure traverse line 13 is preferably LGJ-240/30 type aerial condutor, described parallel groove clamp to be measured can be polytype parallel groove clamps such as JBY-603 type aluminium matter parallel groove clamp.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (7)
1. the measuring system of a parallel groove clamp thermal contact resistance is characterized in that, comprising: pressure regulator, current lifting device, measure traverse line and thermocouple temperature measurement instrument;
The two ends of described measure traverse line connect by parallel groove clamp to be measured, the primary side of described pressure regulator connects AC power, secondary side is connected to the two ends of described current lifting device, described current lifting device is coupling on the described measure traverse line, and described thermocouple temperature measurement instrument connects respectively the surface of described parallel groove clamp to be measured and the surface of contact of described parallel groove clamp to be measured and described measure traverse line.
2. the measuring system of parallel groove clamp thermal contact resistance as claimed in claim 1 is characterized in that, described thermocouple temperature measurement instrument connects respectively the parallel groove clamp described to be measured surface of same xsect and the surface of contact of described parallel groove clamp to be measured and described measure traverse line.
3. such as the measuring system of claim 1 or 2 described parallel groove clamp thermal contact resistances, it is characterized in that, described thermocouple temperature measurement instrument comprises two groups of measurement points, every group comprises two measurement points, and described two measurement points of every group connect respectively the surface of described parallel groove clamp to be measured and the surface of contact of described parallel groove clamp to be measured and described measure traverse line.
4. the measuring system of parallel groove clamp thermal contact resistance as claimed in claim 1 is characterized in that, also comprises two reactive-load compensation capacitors, and the two ends of described current lifting device are respectively by ground connection behind the described reactive-load compensation capacitor.
5. the measuring system of parallel groove clamp thermal contact resistance as claimed in claim 1, it is characterized in that, described pressure regulator, current lifting device are arranged on indoor, described measure traverse line and described thermocouple temperature measurement instrument are arranged on outdoor, described measure traverse line is erected on the shaft tower, described measure traverse line wherein one section stretch into the coupling of indoor and described current lifting device.
6. the measuring system of parallel groove clamp thermal contact resistance as claimed in claim 1 is characterized in that, described thermocouple temperature measurement instrument is T-shaped thermocouple temperature measurement instrument.
7. the measuring system of parallel groove clamp thermal contact resistance as claimed in claim 1 is characterized in that, also comprises processor, and described processor connects described thermocouple temperature measurement instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320269459 CN203259488U (en) | 2013-05-16 | 2013-05-16 | Measuring system for thermal contact resistance of parallel groove clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320269459 CN203259488U (en) | 2013-05-16 | 2013-05-16 | Measuring system for thermal contact resistance of parallel groove clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203259488U true CN203259488U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320269459 Expired - Lifetime CN203259488U (en) | 2013-05-16 | 2013-05-16 | Measuring system for thermal contact resistance of parallel groove clamp |
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|---|---|
| CN (1) | CN203259488U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950451A (en) * | 2017-05-02 | 2017-07-14 | 国网山东省电力公司电力科学研究院 | Power line tension pipe ducting capacity appraisal procedure and system based on current detecting |
| CN108519406A (en) * | 2018-03-23 | 2018-09-11 | 华南理工大学 | A kind of computational methods of the conductor thermal resistance and thermal-convection resistance of aerial earth wire axial direction |
-
2013
- 2013-05-16 CN CN 201320269459 patent/CN203259488U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950451A (en) * | 2017-05-02 | 2017-07-14 | 国网山东省电力公司电力科学研究院 | Power line tension pipe ducting capacity appraisal procedure and system based on current detecting |
| CN108519406A (en) * | 2018-03-23 | 2018-09-11 | 华南理工大学 | A kind of computational methods of the conductor thermal resistance and thermal-convection resistance of aerial earth wire axial direction |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |
|
| CX01 | Expiry of patent term |