CN204101663U - Lightning arrester with electrical testing meter - Google Patents
Lightning arrester with electrical testing meter Download PDFInfo
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- CN204101663U CN204101663U CN201420593821.6U CN201420593821U CN204101663U CN 204101663 U CN204101663 U CN 204101663U CN 201420593821 U CN201420593821 U CN 201420593821U CN 204101663 U CN204101663 U CN 204101663U
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- voltage
- signal
- lightning arrester
- phase
- current
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- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 230000003750 conditioning effect Effects 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000032683 aging Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Abstract
A kind of lightning arrester with electrical testing meter, for the live testing of intelligent substation lightning arrester.Testing instrument for electrified is connected with 220V supply voltage in transformer station, the lightning arrester that need test respectively; Testing instrument for electrified is embedded in voltage-phase compensating module; The signal acquiring system of voltage-phase compensating module gathers voltage signal and the current signal of transformer station 220V voltage, input signal conditioning system.Signal condition system by gather 220V voltage signal with current signal after being connected high-tension coil, low-voltage coil voltage compensation, obtain the phase compensation voltage consistent with busbar voltage and current signal, be connected with single-chip microcomputer through over-current sensor, operational amplifier, resistance, electric capacity, AD conversion.The utility model does not directly gather PT voltage, obtains PT voltage accurate phase, can improve lightning arrester live-line test work efficiency and field apparatus safe operation stability by interior 220V voltage of standing under making lightning arrester live detection be operated in the reliable prerequisite of guarantee detection.
Description
Technical field
The utility model relates to power equipment application tool technical field, specifically a kind of testing instrument for electrified for intelligent substation lightning arrester.
Background technology
Lightning arrester is as one of important equipment of electric system; its effect is used to protect the equipment that in electric system, various electric equipment impacts from lightning surge, switching overvoltage, Frequency Transient Overvoltage and damages; be directly connected to the safe and stable operation of electric system; if make moist aging and be not found, the impact so caused electrical network and loss are huge.So lightning arrester test is conventional test in preventive trial code.But intelligent substation PT secondary side voltage cannot gather.
Metal oxide arrester (hereinafter referred to as MOA) is the widely used overvoltage protective device of current electric system.MOA operational factor can simplify the parallel circuit being equivalent to a variable resistor and a constant electric capacity.MOA is under working voltage effect, and its ZnO resistors sector-meeting is aging gradually, or makes moist due to seal failure, causes current in resistance property to increase, and therefore by measuring the change of MOA current in resistance property, just can understand the operation conditions of MOA.
Current most of MOA testing current in resistance property instrument all extensively adopts PT secondary side voltage signal phase place to measure the phase differential with current signal as benchmark, judge the quality of lightning arrester according to the phase condition of the two, visible accurate acquisition voltage signal becomes the key point that instrument is accurately measured.But the collection of on-the-spot PT secondary side voltage often has difficulties: collection in worksite PT voltage increases the risk of PT secondary circuit short-circuit.There is shelter in the middle of between the lightning arrester of some substation field and PT or do not allow directly to gather from PT side, causing voltage to obtain.
Summary of the invention
For overcoming the deficiencies in the prior art, goal of the invention of the present utility model is to provide a kind of lightning arrester with electrical testing meter, make 220V supply voltage acquired in transformer station as reference voltage, with busbar voltage and PT secondary side voltage in phase, to solve the voltage-phase acquisition problems of lightning arrester live-line test.
For achieving the above object, testing instrument for electrified of the present utility model is connected with 220V supply voltage in transformer station, the lightning arrester that need test respectively; Testing instrument for electrified is embedded in voltage-phase compensating module;
The signal acquiring system of described voltage-phase compensating module gathers voltage signal and the current signal of transformer station 220V voltage, input signal conditioning system.
Described signal condition system by the 220V voltage signal collected with current signal after being connected high-tension coil, low-voltage coil voltage compensation, obtain the phase compensation voltage consistent with busbar voltage and current signal, be connected with single-chip microcomputer through over-current sensor, operational amplifier, resistance, electric capacity, AD conversion.
The utility model adopts 220V supply voltage in station to make reference voltage.But there is a fixed phase drift between reference voltage and busbar voltage, electric pressure this phase shift higher is larger, and its reason is often have certain change through its output voltage phase place of stage transformer.The transformer progression of process is more, and phase shift is larger.
The utility model is by voltage compensator and software compensation algorithm, the 220V voltage collected is obtained the phase place consistent with busbar voltage after voltage compensation module, through signal condition system, deliver to single-chip microcomputer and calculate phase differential, application trigonometric function, can current in resistance property be calculated according to total current, and then understand the operation conditions of MOA.
Under the utility model makes the live detection of lightning arrester be operated in the prerequisite ensureing detecting reliability, directly do not gather PT voltage, obtained the accurate phase of PT voltage by interior 220V voltage of standing, drastically increase the work efficiency of lightning arrester live-line test and the stability of field apparatus safe operation.
Accompanying drawing explanation
Fig. 1 is the overall hardware block diagram of instrument.
Fig. 2 is wiring diagram of the present utility model.
Embodiment
As shown in Figure 1 and Figure 2, testing instrument for electrified 13 is connected with 220V supply voltage in transformer station, the lightning arrester 14 that need test respectively; Testing instrument for electrified 13 is embedded in voltage-phase compensating module 15; The signal acquiring system 2 of described voltage-phase compensating module 15 gathers voltage signal V and the current signal Ix of transformer station 220V voltage, input signal conditioning system.
For obtaining voltage accurate phase, devise voltage compensator and software compensation algorithm.Substation bus bar high pressure through high-tension coil 3,4, main-transformer and a series of decompression device such as station local coordinate frame, low-voltage coil 5,6, obtain 220V voltage, the advanced busbar voltage certain angle of this voltage-phase (for 60 degree).If 220V voltage delay 60 degree (or advanced 300 degree) in station, then obtain new voltage and busbar voltage and PT secondary side voltage in phase, solve voltage-phase acquisition problems.
Signal condition system by the 220V voltage signal that collects and current signal through high-tension coil 3,4, main-transformer and station local coordinate frame, after low-voltage coil 5,6 voltage compensation, obtain the phase compensation voltage consistent with busbar voltage and current signal, be connected with single-chip microcomputer 12 through over-current sensor 7, operational amplifier 8, resistance 9, electric capacity 10, AD conversion 11; Regulated and controled by single-chip microcomputer 12, calculate phase differential, application trigonometric function, can calculate current in resistance property according to total current.By instrument operations, draw required data.
Claims (2)
1. a lightning arrester with electrical testing meter, is characterized in that: testing instrument for electrified (13) is connected with 220V supply voltage in transformer station, the lightning arrester (14) that need test respectively; Testing instrument for electrified (13) is embedded in voltage-phase compensating module (15);
The signal acquiring system (2) of described voltage-phase compensating module (15) gathers voltage signal and the current signal of transformer station 220V voltage, input signal conditioning system.
2. lightning arrester with electrical testing meter according to claim 1, it is characterized in that: described signal condition system (2) by the 220V voltage signal collected with current signal after being connected high-tension coil, low-voltage coil voltage compensation, obtain the phase compensation voltage consistent with busbar voltage and current signal, be connected with single-chip microcomputer (12) through over-current sensor (7), operational amplifier (8), resistance (9), electric capacity (10), AD conversion (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420593821.6U CN204101663U (en) | 2014-10-14 | 2014-10-14 | Lightning arrester with electrical testing meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420593821.6U CN204101663U (en) | 2014-10-14 | 2014-10-14 | Lightning arrester with electrical testing meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204101663U true CN204101663U (en) | 2015-01-14 |
Family
ID=52270080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420593821.6U Expired - Fee Related CN204101663U (en) | 2014-10-14 | 2014-10-14 | Lightning arrester with electrical testing meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204101663U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182160A (en) * | 2015-09-21 | 2015-12-23 | 厦门大恒科技有限公司 | On-line SPD microampere current leakage detecting device |
| CN105548765A (en) * | 2015-12-31 | 2016-05-04 | 国网浙江省电力公司金华供电公司 | GIS zinc oxide lightning arrester live-line tester |
| CN106483360A (en) * | 2015-08-26 | 2017-03-08 | 国网河南省电力公司检修公司 | Method using 220V power supply on-line monitoring arrester resistance current |
-
2014
- 2014-10-14 CN CN201420593821.6U patent/CN204101663U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106483360A (en) * | 2015-08-26 | 2017-03-08 | 国网河南省电力公司检修公司 | Method using 220V power supply on-line monitoring arrester resistance current |
| CN106483360B (en) * | 2015-08-26 | 2019-03-12 | 国网河南省电力公司检修公司 | Utilize the method for 220V power supply on-line monitoring MOA current in resistance property |
| CN105182160A (en) * | 2015-09-21 | 2015-12-23 | 厦门大恒科技有限公司 | On-line SPD microampere current leakage detecting device |
| CN105182160B (en) * | 2015-09-21 | 2018-08-31 | 厦门大恒科技有限公司 | A kind of online SPD microampere orders leak current detection device |
| CN105548765A (en) * | 2015-12-31 | 2016-05-04 | 国网浙江省电力公司金华供电公司 | GIS zinc oxide lightning arrester live-line tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20191014 |