CN204287388U - A kind of bushing shell for transformer insulation state on-line monitoring device - Google Patents
A kind of bushing shell for transformer insulation state on-line monitoring device Download PDFInfo
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- CN204287388U CN204287388U CN201420391035.8U CN201420391035U CN204287388U CN 204287388 U CN204287388 U CN 204287388U CN 201420391035 U CN201420391035 U CN 201420391035U CN 204287388 U CN204287388 U CN 204287388U
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- 238000009413 insulation Methods 0.000 title claims abstract description 18
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Abstract
The utility model belongs to the technical field of bushing shell for transformer state of insulation on-line monitoring, particularly relates to a kind of bushing shell for transformer insulation state on-line monitoring device.The utility model device comprises current sensing unit, signal condition unit, data acquisition and processing unit, communication unit, storage unit, display unit and power supply unit.This device does not need to introduce PT with reference to calculating, and can adapt to the measurement requirement of intelligent substation completely, and installs simple, and economic benefit is given prominence to.The utility model can when not needing extraction voltage mutual inductor secondary singal the variation tendency of monitoring sleeve relative medium loss factor, thus react the state of insulation of sleeve pipe accurately and efficiently, ensure the safe and stable operation of equipment.Meet IEC61850 stipulations simultaneously, there is function and the traffic model of specification, can be implemented in the Function Integration Mechanism of line monitoring device and main IED, can be applicable to intelligent substation.<u/>
Description
Technical field
The utility model belongs to the technical field of power transformer sleeve pipe insulation state on-line monitoring device, particularly relate to a kind of bushing shell for transformer insulation state on-line monitoring device, adopt the on-Line Monitor Device of relative method calculating transformer sleeve pipe relative medium loss factor, the utility model based on IEC61850 stipulations, and can be applicable to intelligent substation.
Background technology
At present, carried out the research of traditional substation transformer sleeve pipe on-Line Monitor Device both at home and abroad, the monitoring method of each device is different, not enough specification.Also there is report to the research of IEC61850, but yet there are no the bushing shell for transformer on-Line Monitor Device meeting IEC61850 stipulations.
For a long time, the bushing shell for transformer on-line monitoring of traditional transformer station adopts the form of monitoring Transformer Bushing Tap Leakage Current and PT secondary voltage angular difference to carry out the dielectric dissipation factor of monitoring sleeve always.At present, along with intelligent substation large-scale application electronic mutual inductor, transformer station has not had PT secondary voltage signal directly to gather, synchronous voltage signal cannot be provided, and counting of the PT voltage acquisition data of electronic mutual inductor is 80 points, sample frequency is 4KHz, cannot meet the data demand of Fourier decomposition, and is difficult to and Transformer Bushing Tap Leakage Current phase-locking.
Because traditional transformer sleeve pipe on-Line Monitor Device and method have limitation and nonstandard problem, be necessary to design and a kind ofly can be applicable to the bushing shell for transformer on-Line Monitor Device of intelligent substation based on IEC61850 stipulations.
Summary of the invention
For above-mentioned problems of the prior art, the utility model provides a kind of bushing shell for transformer insulation state on-line monitoring device.The utility model, by the three-phase end shield Leakage Current signal of synchronized sampling bushing shell for transformer, by the phase place of relatively three-phase sleeve pipe ground current, obtains the relative medium loss factor of sleeve pipe in conjunction with relative method.The utility model breaches traditional transformer sleeve pipe on-Line Monitor Device, can realize the on-line monitoring of bushing shell for transformer when intelligent substation does not have PT bis-analog voltage signals equally.
The utility model also meets IEC61850 stipulations simultaneously, there is function and the traffic model of specification, the interoperability of equipment can be realized, meet the requirement of State Grid Corporation of China for intelligent substation field apparatus, can be implemented in the Function Integration Mechanism of line monitoring device and main IED.
The utility model solves the technical scheme that its technical matters adopts:
A kind of bushing shell for transformer insulation state on-line monitoring device, comprises current sensing unit, signal condition unit, data acquisition and processing unit, communication unit, storage unit, display unit and power supply unit.
Wherein: the input end of the output terminal connection signal conditioning unit of current sensing unit; The output terminal of signal condition unit is connected with the input end of data acquisition and processing unit, and the output terminal of data acquisition and processing unit is connected with communication unit, storage unit and display unit respectively; Power supply unit is connected with signal condition unit, data acquisition and processing unit, communication unit, storage unit and display unit respectively.
Described current sensing unit is provided with three groups, respectively A, B, C tri-of connection transformer sleeve pipe.
Described communication unit adopts ethernet interface, is connected with backstage in station by communication unit.
Described signal condition unit carries out I-V conversion, amplification and filtering process to three-phase current signal, current signal is converted to the voltage signal that can gather for data acquisition and processing unit; Then, data acquisition and processing unit carry out A-D conversion and data processing to signal, calculate the vector phase of three-phase transformer sleeve pipe ground current, then obtain the relative medium loss factor of three-phase sleeve pipe according to relative method; Finally, result of calculation is successively preserved in the memory unit by data acquisition and processing unit, by communication unit, result is uploaded to backstage in station, drives display unit display monitoring result; Package unit is powered by power supply unit.
The utility model has following innovative point:
(1) when intelligent substation does not have PT bis-analog voltage signals, obtained the relative medium loss factor of bushing shell for transformer by relative method, its variation tendency can reflect the state of insulation of sleeve pipe;
(2) meet IEC61850 stipulations, there is function and the traffic model of specification;
(3) can be implemented in the Function Integration Mechanism of line monitoring device and main IED;
(4) three-phase transformer sleeve pipe synchro measure, real-time is high, is easy to on-the-spot installing and using.
Advantage of the present utility model and effect are:
Prove through retrieval, have no the application report directly being carried out detection thimble state of insulation by synchro measure one group of three-phase transformer sleeve pipe at present.The utility model device does not need to introduce PT with reference to calculating, and can adapt to the measurement requirement of intelligent substation completely, and installs simple, and economic benefit is given prominence to.The utility model detection method, can when not needing extraction voltage mutual inductor secondary singal the variation tendency of monitoring sleeve relative medium loss factor, thus react the state of insulation of sleeve pipe accurately and efficiently, ensure the safe and stable operation of equipment.The utility model meets IEC61850 stipulations simultaneously, has function and the traffic model of specification, can be implemented in the Function Integration Mechanism of line monitoring device and main IED.
Below in conjunction with specific embodiment of the utility model mode and accompanying drawing, the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the utility model monitoring device.
In figure: current sensing unit 1, signal condition unit 2, data acquisition and processing unit 3, communication unit 4, storage unit 5, display unit 6, power supply unit 7.
Embodiment
The utility model is a kind of bushing shell for transformer insulation state on-line monitoring device, and as shown in Figure 1, the utility model pick-up unit comprises signal condition unit 2, data acquisition and processing unit 3, communication unit 4, storage unit 5, display unit 6 and power supply unit 7.
Wherein: the input end of the output terminal connection signal conditioning unit 2 of current sensing unit 1; The output terminal of signal condition unit 2 is connected with the input end of data acquisition and processing unit 3, and the output terminal of data acquisition and processing unit 3 is connected with communication unit 4, storage unit 5 and display unit 6 respectively; Power supply unit 7 is connected with signal condition unit 2, data acquisition and processing unit 3, communication unit 4, storage unit 5 and display unit 6 respectively.
Described current sensing unit 1 is provided with three groups, respectively A, B, C tri-of connection transformer sleeve pipe.
The utility model device, by the three-phase ground current signal of synchronized sampling intelligent substation bushing shell for transformer, obtains the relative medium loss factor of sleeve pipe in conjunction with relative method.The utility model can realize the on-line monitoring of bushing shell for transformer equally when intelligent substation does not have PT bis-analog voltage signals.The utility model also meets IEC61850 stipulations simultaneously, there is function and the traffic model of specification, the interoperability of equipment can be realized, meet the requirement of State Grid Corporation of China for intelligent substation field apparatus, can be implemented in the Function Integration Mechanism of line monitoring device and main IED.
Concrete operations are as follows:
The utility model utilizes bushing shell for transformer insulation state on-line monitoring device, successively obtains current signal, nurses one's health, gathers, processes, analyzes, communicates, stores and show.
First, the utility model bushing shell for transformer on-Line Monitor Device obtains the ground current signal of one group of three-phase transformer sleeve pipe by current sensing unit 1, and current signal is inputed to signal condition unit 2.
Signal condition unit 2 utilizes mixed electronic element to carry out I-V conversion, amplification and filtering process to three-phase current signal, current signal is converted to the voltage signal that can gather for data acquisition and processing unit 3; Then, data acquisition and processing unit 3 pairs of signals carry out A-D conversion and data-optimized process, calculate the vector phase of three-phase transformer sleeve pipe ground current, then obtain the relative medium loss factor of three-phase sleeve pipe according to relative method; Finally, result of calculation is successively kept in storage unit 5 by data acquisition and processing unit 3, by communication unit 4, result is uploaded to backstage in station, drives display unit 6 to show monitoring result.Package unit is powered by power supply unit 7.
During enforcement, signal condition unit 2 is primarily of element compositions such as the instrument amplifier of ADI company precision, Low Drift Temperature low noise amplifier and high-accuracy voltage reference sources.The signal processing flow of signal condition unit 2 is as follows: the I/V conversion first realizing input signal, converts the current signal of input to voltage signal; Signal transmission suppresses circuit to radio frequency afterwards, suppresses the high frequency noise of substation field; Then signal transmission carries out signal amplification to instrument amplifier, signal amplitude is adjusted to the scope that applicable AD converter gathers; Last signal transmission, to second order active low-pass filter circuit, carries out further filtering process to signal.Signal is now exactly the output signal of signal condition unit 2.
Data acquisition and processing unit 3 mainly contain the processor of ARM company advanced person and the high-speed synchronous AD converter composition of ADI company.The signal processing flow of data acquisition and processing unit 3 is as follows: the analog to digital conversion first realizing signal, synchronously converts three-phase simulation signal to three-phase digital signal, then passes to processor; Processor carries out discrete Fourier transformation to signal, obtain the phase place of three-phase signal, the relative medium loss factor of A phase and C phase sleeve pipe is calculated again according to relative method, the result obtained is kept at storage unit 5, result is outputted to display unit 6 simultaneously, long-term monitoring can obtain the variation tendency of relative medium loss factor, can analyze the state of insulation of sleeve pipe according to variation tendency.
Communication unit 4 adopts ethernet interface, and the utility model device is directly connected, for uploading Monitoring Data with backstage in station by communication unit 4.
Storage unit 5 is primarily of FLASH chip composition, and major function stores monitoring result, and the important parameter of device.
Display unit 6 is formed primarily of the electronic display of technical grade, for showing monitoring result, is convenient to man-machine interaction.
Power supply unit 7 forms primarily of high-grade insulating power supply module, for power to package unit and protective device is not damaged by superpotential.
Claims (3)
1. a bushing shell for transformer insulation state on-line monitoring device, is characterized in that: comprise current sensing unit (1), signal condition unit (2), data acquisition and processing unit (3), communication unit (4), storage unit (5), display unit (6) and power supply unit (7);
Wherein: the input end of the output terminal connection signal conditioning unit (2) of current sensing unit (1); The output terminal of signal condition unit (2) is connected with the input end of data acquisition and processing unit (3), and the output terminal of data acquisition and processing unit (3) is connected with communication unit (4), storage unit (5) and display unit (6) respectively; Power supply unit (7) is connected with signal condition unit (2), data acquisition and processing unit (3), communication unit (4), storage unit (5) and display unit (6) respectively.
2. a kind of bushing shell for transformer insulation state on-line monitoring device according to claim 1, is characterized in that: described current sensing unit (1) is provided with three groups, respectively A, B, C tri-of connection transformer sleeve pipe.
3. a kind of bushing shell for transformer insulation state on-line monitoring device according to claim 1, is characterized in that: described communication unit (4) adopts ethernet interface, is connected with backstage in station by communication unit (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420391035.8U CN204287388U (en) | 2014-07-16 | 2014-07-16 | A kind of bushing shell for transformer insulation state on-line monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420391035.8U CN204287388U (en) | 2014-07-16 | 2014-07-16 | A kind of bushing shell for transformer insulation state on-line monitoring device |
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| CN204287388U true CN204287388U (en) | 2015-04-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122490A (en) * | 2014-07-16 | 2014-10-29 | 国家电网公司 | Transformer bushing insulation state online monitoring device and method |
| CN108680841A (en) * | 2018-06-26 | 2018-10-19 | 广西电网有限责任公司电力科学研究院 | A kind of Operation Condition of Power Transformers comprehensive monitor system |
| CN110208665A (en) * | 2019-07-05 | 2019-09-06 | 杭州西湖电子研究所 | A kind of detection method of wide area with respect to dielectric loss |
-
2014
- 2014-07-16 CN CN201420391035.8U patent/CN204287388U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122490A (en) * | 2014-07-16 | 2014-10-29 | 国家电网公司 | Transformer bushing insulation state online monitoring device and method |
| CN108680841A (en) * | 2018-06-26 | 2018-10-19 | 广西电网有限责任公司电力科学研究院 | A kind of Operation Condition of Power Transformers comprehensive monitor system |
| CN110208665A (en) * | 2019-07-05 | 2019-09-06 | 杭州西湖电子研究所 | A kind of detection method of wide area with respect to dielectric loss |
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