CN203422170U - Equipment for simultaneously monitoring temperatures of oil surface and winding of transformer - Google Patents
Equipment for simultaneously monitoring temperatures of oil surface and winding of transformer Download PDFInfo
- Publication number
- CN203422170U CN203422170U CN201320437819.5U CN201320437819U CN203422170U CN 203422170 U CN203422170 U CN 203422170U CN 201320437819 U CN201320437819 U CN 201320437819U CN 203422170 U CN203422170 U CN 203422170U
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- CN
- China
- Prior art keywords
- oil surface
- temperature
- winding
- transformer
- chip microcomputer
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- Expired - Lifetime
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- Housings And Mounting Of Transformers (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The utility model discloses a piece of equipment for simultaneously monitoring the temperatures of an oil surface and a winding of a transformer. The equipment is provided with a temperature sensor and a mutual inductor. The temperature sensor is connected with a single chip microcomputer through an operational amplification and filtering circuit A. The output of the mutual inductor is connected with the single chip microcomputer through an alternating-current transducer and an operational amplification and filtering circuit B. The single chip microcomputer is further connected with a display screen, an alarm driving circuit, an oil surface temperature signal output circuit, a winding temperature signal output circuit and a communication interface circuit. The output of the alarm driving circuit is connected with an alarm device. The temperatures of an oil surface and a winding of a transformer can be simultaneously monitored, and the problems such as troublesome operation, complex monitoring equipment structure and high cost caused by step-by-step monitoring in the prior art are avoided.
Description
Technical field
The utility model relates to a kind of transformer oil surface and winding temperature monitoring equipment, especially a kind of simple to operate, save cost, can monitor the equipment of transformer oil surface and winding temperature simultaneously.
Background technology
At present, primary structure for the monitoring equipment of transformer oil surface and winding is to be provided with the current transformer joining with transformer current mutual inductor, current transformer output is joined with heating (resistance wire), heating is placed in the copper body of inner chamber, front end at copper body has catch bar, copper intracoelomic cavity communicates with temperature-sensitive bag by conduit, in the sealing system forming, has all been full of temperature sensing medium at temperature-sensitive bag, sensing catheter and copper body.Its monitoring is that substep carries out: during measuring transformer oil surface temperature, temperature-sensitive bag is placed in transformer oil, the temperature that temperature-sensitive bag is responded to changes the volume of temperature sensing medium thereupon, volume variable orders about catch bar and produces a corresponding displacement, drive movement and drive with movement one and be placed in the pointer rotation on dial plate, indication measured oil surface temperature; During monitoring Transformer Winding temperature, make the electric current of current transformer output flow through the heating in copper body, the heating-up temperature of heating reexpands the volume of temperature sensing medium, continues push pointer and rotates, thereby realize stack temperature rise to indicate tested winding temperature.There are the following problems for existing monitoring equipment:
1. only have temperature-sensitive bag to be placed in tested sensor oil, and other parts are all consistent with outdoor temperature, the variation of outdoor temperature directly affects monitoring result, although existing various indemnifying measures, but can not thoroughly stop the measuring error that environment temperature causes.
2. complex structure, cost are high, and the substep monitoring to oil surface temperature and winding temperature, make troublesome poeration.
Summary of the invention
The utility model is in order to solve the existing above-mentioned technical matters of prior art, and a kind of simple to operate, saving cost is provided, and can monitor the equipment of transformer oil surface and winding temperature simultaneously.
A kind of equipment of simultaneously monitoring transformer oil surface and winding temperature, be provided with temperature sensor and mutual inductor, temperature sensor joins by operation amplifier filtering circuit A and single-chip microcomputer, the output of mutual inductor is joined by AC current transducer and operation amplifier filtering circuit B and single-chip microcomputer, also be connected to display screen, warning driving circuit, oil surface temperature signal output apparatus, winding temperature signal output apparatus and communication interface circuit with single-chip microcomputer, output and the warning device of warning driving circuit join.
The utility model is that usable temp sensor directly gathers transformer oil surface temperature and gathers (measurement) high voltage side of transformer load current I with mutual inductor etc., by formula T=T
p+ Δ T (I/ I
volume)
2m, calculate Transformer Winding temperature.Not only whole observation process is not influenced by ambient temperature, and set blower fan cooling ratio (m) and carried out temperature compensation, measuring accuracy high (can reach 0.5%), more crucial is to monitor transformer oil surface and winding temperature simultaneously, avoid the essential substep monitoring of prior art and problem, the problem includes: troublesome poeration, monitoring equipment complex structure, high in cost of production problem.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment monitoring equipment schematic block circuit diagram used.
Embodiment
The schematic block circuit diagram of the utility model embodiment monitoring equipment used can be as shown in Figure 1: be provided with temperature sensor and mutual inductor, temperature sensor joins by operation amplifier filtering circuit A and single-chip microcomputer, the output of mutual inductor is joined by AC current transducer (real effective current transducer) and operation amplifier filtering circuit B and single-chip microcomputer, be connected to display screen, warning driving circuit, oil surface temperature signal output apparatus, winding temperature signal output apparatus and communication interface circuit with single-chip microcomputer, output and the warning device of warning driving circuit join.
Measuring principle and method are as follows:
A. can directly read high voltage side of transformer load current I with direct ，Ye Kecong transformer station backstages that gathers such as mutual inductors; With temperature sensor (thermopair, platinum resistance etc.), gather transformer oil surface temperature T
p;
B. be calculated as follows winding temperature T:
T=T
p+ Δ T (I/ I
volume)
2m
In formula:
Δ T-specified temperature rise (transformer nameplate mark);
I
volume-rated current (transformer nameplate mark);
M-blower fan cooling ratio, during fan starting, m=0.8; When blower fan cuts out, m=1.
The temperature variant electric signal that temperature sensor gathers, after processing, operation amplifier filtering circuit A delivers to single-chip microcomputer, the high voltage side of transformer load current I that mutual inductor gathers delivers to single-chip microcomputer after AC current transducer and operation amplifier filtering circuit B processing, and single-chip microcomputer is according to being calculated as follows winding temperature T:T=T
p+ Δ T (I/ I
volume)
2m.
Single-chip microcomputer shows the transformer oil surface temperature and the winding temperature that obtain by display screen, can export corresponding control signal by oil surface temperature signal output apparatus, winding temperature signal output apparatus simultaneously, by communication interface circuit, realize temperature data teletransmission, when reaching design temperature, single-chip microcomputer output drive signal, to the driving circuit of reporting to the police, starts warning device and reports to the police.
Claims (1)
1. an equipment of simultaneously monitoring transformer oil surface and winding temperature, it is characterized in that: be provided with temperature sensor and mutual inductor, temperature sensor joins by operation amplifier filtering circuit A and single-chip microcomputer, the output of mutual inductor is joined by AC current transducer and operation amplifier filtering circuit B and single-chip microcomputer, also be connected to display screen, warning driving circuit, oil surface temperature signal output apparatus, winding temperature signal output apparatus and communication interface circuit with single-chip microcomputer, output and the warning device of warning driving circuit join.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320437819.5U CN203422170U (en) | 2013-07-23 | 2013-07-23 | Equipment for simultaneously monitoring temperatures of oil surface and winding of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320437819.5U CN203422170U (en) | 2013-07-23 | 2013-07-23 | Equipment for simultaneously monitoring temperatures of oil surface and winding of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203422170U true CN203422170U (en) | 2014-02-05 |
Family
ID=50021265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320437819.5U Expired - Lifetime CN203422170U (en) | 2013-07-23 | 2013-07-23 | Equipment for simultaneously monitoring temperatures of oil surface and winding of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203422170U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280146A (en) * | 2014-10-23 | 2015-01-14 | 国家电网公司 | Contact type temperature alarm for transformer substation |
| CN105097204A (en) * | 2015-08-27 | 2015-11-25 | 安徽西高电气设备有限公司 | Self-test transformer |
| CN105407574A (en) * | 2015-12-11 | 2016-03-16 | 成都翰道科技有限公司 | Signal processing circuit-based energy-saving control system for intelligent LED lamp |
-
2013
- 2013-07-23 CN CN201320437819.5U patent/CN203422170U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280146A (en) * | 2014-10-23 | 2015-01-14 | 国家电网公司 | Contact type temperature alarm for transformer substation |
| CN105097204A (en) * | 2015-08-27 | 2015-11-25 | 安徽西高电气设备有限公司 | Self-test transformer |
| CN105407574A (en) * | 2015-12-11 | 2016-03-16 | 成都翰道科技有限公司 | Signal processing circuit-based energy-saving control system for intelligent LED lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140205 |
|
| CX01 | Expiry of patent term |