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
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- phase
- lightning arrester
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- 238000012360 testing method Methods 0.000 title abstract description 17
- 230000003750 conditioning effect Effects 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims abstract 2
- 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
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
一种避雷器带电测试仪，用于智能变电站避雷器的带电测试。带电测试仪分别与变电站内220V电源电压、需测试的避雷器连接；带电测试仪内嵌入电压相位补偿模块；电压相位补偿模块的信号采集系统采集变电站220V电压的电压信号与电流信号，输入信号调理系统。信号调理系统将采集的220V电压信号与电流信号经过连接高压线圈、低压线圈电压补偿后，得到和母线电压一致的相位补偿电压及电流信号，经过电流传感器、运算放大器、电阻、电容、AD转换与单片机连接。本实用新型使避雷器带电检测工作在保证检测可靠前提下，不直接采集PT电压，通过站内220V电压获得PT电压准确相位，可提高避雷器带电测试工作效率和现场设备安全运行稳定性。
The utility model relates to a lightning arrester live tester, which is used for live test of lightning arresters in intelligent substations. The live tester is connected to the 220V power supply voltage in the substation and the lightning arrester to be tested; the voltage phase compensation module is embedded in the live tester; the signal acquisition system of the voltage phase compensation module collects the voltage signal and current signal of the 220V voltage of the substation, and inputs the signal conditioning system . The signal conditioning system connects the collected 220V voltage signal and current signal to the high-voltage coil and low-voltage coil for voltage compensation to obtain a phase-compensated voltage and current signal consistent with the bus voltage. After the current sensor, operational amplifier, resistor, capacitor, AD conversion and MCU connection. The utility model enables the live detection work of the arrester to ensure reliable detection, does not directly collect the PT voltage, and obtains the accurate phase of the PT voltage through the 220V voltage in the station, which can improve the work efficiency of the live test of the arrester and the safe operation stability of the field equipment.
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)
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
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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 |
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| CN (1) | CN204101663U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
-
2014
- 2014-10-14 CN CN201420593821.6U patent/CN204101663U/en not_active Expired - Fee Related
Cited By (4)
| 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 |
| 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 |
Granted publication date: 20150114 Termination date: 20191014 |
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| CF01 | Termination of patent right due to non-payment of annual fee |