CN202494743U - Electrified tester for zinc oxide lightning arrester - Google Patents
Electrified tester for zinc oxide lightning arrester Download PDFInfo
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- CN202494743U CN202494743U CN2012201430126U CN201220143012U CN202494743U CN 202494743 U CN202494743 U CN 202494743U CN 2012201430126 U CN2012201430126 U CN 2012201430126U CN 201220143012 U CN201220143012 U CN 201220143012U CN 202494743 U CN202494743 U CN 202494743U
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- conversion
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Abstract
The utility model relates to an electrified tester for a zinc oxide lightning arrester. The electrified tester comprises a signal acquisition and conversion system, a signal processing and displaying system, a power supply system, and a magnetic isolation module, wherein the signal acquisition and conversion system is divided into a current signal acquisition and conversion circuit and a voltage signal acquisition and conversion circuit; the current signal acquisition and conversion circuit comprises a hook type current mutual inductor, an operational amplifier and an A/D converter which are connected in sequence; the voltage signal acquisition and conversion circuit comprises a voltage mutual inductor, an operational amplifier and an A/D converter which are connected in sequence; the signal processing and displaying system comprises a CPU, and the CPU is connected with a printer, a liquid crystal display screen, a memory and a keyboard respectively; the power supply system comprises a two-way magnetic isolation power supply and a battery; the two-way magnetic isolation power supply is connected wit the signal acquisition and conversion system, and the battery is connected with the keyboard; and the magnetic isolation module is connected with the A/D converter and the CPU. According to the electrified tester of the utility model, the online electrified measurement of the 10KV zinc oxide lightning arrester is realized, and the accuracy and efficiency of detection are increased.
Description
Technical field
The utility model relates to a kind of electrified tester for zinc oxide arrester, refers more particularly to the 10KV electrified tester for zinc oxide arrester.
Background technology
In the system for distribution network of power, numerous substation transformer and cable line etc. all will be installed lightning arrester as lightning protection, the link that the 10KV power distribution network is a power circuit structure in the power network, environment for use is the most complicated.All will install lightning arrester as lightning protection for numerous substation transformer and cable line etc., therefore, the probability of lightning arrester fault is bigger in the 10KV power distribution network.So the safety assessment of electric system has been brought up to the detection of distribution system lightning arrester the equal requirement of generating plant, electric substation's lightning arrester detection.But the power failure field-strip is adopted in present detection, and method is outmoded, and workload is big, press in the new detection means that guarantees under the precision prerequisite, so live testing should be the development trend of 10kV Zinc-Oxide Arrester test mode.
Summary of the invention
The utility model has proposed a kind of electrified tester for zinc oxide arrester to the problems referred to above, makes the test of 10kV Zinc-Oxide Arrester under charged duty, carry out, thereby increase work efficiency that practicality is stronger.The utility model is realized through following technical scheme:
A kind of electrified tester for zinc oxide arrester comprises signals collecting and converting system, signal Processing and display system, power-supply system; It is characterized in that said signals collecting and converting system are divided into current signal collection and conversion and voltage signal acquisition and two circuits of conversion; Said current signal collection comprises hook type current transformer, transport and placing device, the A/D converter that links to each other successively with conversion line; Said voltage signal acquisition comprises voltage transformer (VT), transport and placing device, the A/D converter that links to each other successively with conversion line; Said signal Processing and display system comprise CPU, and CPU is connected with printer, LCDs, storer, keyboard respectively; Said power-supply system comprises two-way magnetic insulating power supply and battery; Said two-way magnetic insulating power supply links to each other with converting system with signals collecting, and battery links to each other with keyboard.
Said electrified tester for zinc oxide arrester comprises the magnetic isolation module; Said magnetic isolation module connects A/D converter and CPU.
Current signals adopts hook type current transformer; Voltage signal acquisition is received the secondary survey that is positioned at homophase PT with tested lightning arrester through the voltage signal input end, obtains voltage input signal through voltage transformer (VT).
After current signal and the voltage signal acquisition; Behind transport and placing device and A/D converter; The inside dual port RAM of A/D converter is read in the data timesharing, carries out the analyzing and processing of Fast Fourier Transform (FFT) pre-service and information by CPU, and the inner dual port RAM of CPU carries out buffer memory to result simultaneously; Carry out result's output through LCDs and printer after data acquisition process finishes, total system controls through keyboard.
The continuous sampling data that the Fast Fourier Transform (FFT) pre-service is sent here A/D converter are carried out buffer memory, carry out conversion then, at last the data after the conversion are carried out subsequent treatment; The Fast Fourier Transform (FFT) pre-service is to directly carrying out 1024 point quick Fourier transform operations through two channel parallel datas behind the A/D converter.
The utility model adopts hook type current transformer; The pincerlike current sensor of high precision is based on the measuring principle of hollow coil; Can under the condition that electricity is isolated, measure the electric current of interchange, pulse and various irregular waveforms; Pincerlike structural design can be so that mutual inductor directly be clipped on the line of lightning arrester, has overcome the shortcoming that hollow core coil current sensor in the past can only be made closed loop configuration, need not break off tested electric current during on-the-spot the use.
The introducing of described magnetic isolation module has been avoided because voltage signal, current signal are gathered respectively, and each other the interference that produce different with the WV of CPU of the voltage of the conversion of signal, raising instrument precision.
CPU is the nucleus module of whole electrified tester for zinc oxide arrester; It is responsible for receiving electric current and the voltage signal that comes from lightning arrester; And the two is carried out analyzing and processing, and the LCDs output or the printer that under the condition of keyboard drive, carry out the result print.
The beneficial effect of the utility model is:
1, adopts the front-end collection mode of high precision hook type current transformer technology, improved the operability of tester as current signal;
2, adopt high-speed a/d converter to gather the momentary signal of current/voltage, adopted the magnetic isolation technology simultaneously, guarantee current-voltage sampling independent operating separately, do not disturb mutually.
The The data FFT of 3, gathering is handled, and isolates current in resistance property and capacity current, has avoided the interference of harmonic wave and electric field.
But 4, the utility model hot line job has improved the efficient that detects when improving accuracy in detection.
Description of drawings
Fig. 1 is the general structure frame figure of the utility model.
Among the figure: 1, two-way magnetic insulating power supply; 2, battery; 3, voltage transformer (VT); 4, transport and placing device; 5, A/D converter; 6, magnetic isolation module; 7, CPU; 8, printer; 9, LCDs; 10, storer; 11, keyboard; 12, hook type current transformer
Embodiment
As shown in Figure 1, a kind of electrified tester for zinc oxide arrester comprises signals collecting and converting system, signal Processing and display system, power-supply system; Signals collecting and converting system are divided into current signal collection and conversion and voltage signal acquisition and two circuits of conversion; Said current signal collection comprises hook type current transformer 12, transport and placing device 4, the A/D converter 5 that links to each other successively with conversion line; Said voltage signal acquisition comprises voltage transformer (VT) 3, transport and placing device 4, the A/D converter 5 that links to each other successively with conversion line; Said signal Processing and display system comprise CPU7, and CPU7 is connected with printer 8, LCDs 9, storer 10, keyboard 11 respectively; Said power-supply system comprises two-way magnetic insulating power supply 1 and battery 2; Said two-way magnetic insulating power supply 1 links to each other with converting system with signals collecting, and battery 2 links to each other with keyboard 11.
Said electrified tester for zinc oxide arrester comprises magnetic isolation module 6; Said magnetic isolation module 6 connects A/D converter 5 and CPU7.
The introducing of magnetic isolation module has been avoided because voltage signal, current signal are gathered respectively, and each other the interference that produce different with the WV of CPU of the voltage of the conversion of signal, raising instrument precision.
Two-way magnetic insulating power supply 1 provides electric energy for total system; Battery 2 provides electric energy for keyboard.
Hook type current transformer 12 is adopted in the collection of electric current; Voltage signal acquisition is received the secondary survey that is positioned at homophase PT with tested lightning arrester through the voltage signal input end, obtains voltage input signal through voltage transformer (VT) 3.The pincerlike current sensor of high precision can be measured the electric current of interchange, pulse and various irregular waveforms based on the measuring principle of hollow coil under the condition that electricity is isolated.Pincerlike structural design can be so that mutual inductor directly be clipped on the line of lightning arrester, has overcome the shortcoming that hollow core coil current sensor in the past can only be made closed loop configuration, need not break off tested electric current during on-the-spot the use.Pincerlike current sensor adopts the pincerlike current sensor of ETCR5100.The pincerlike leakage current sensor of the pincerlike current sensor high precision of ETCR5100 adopts up-to-date CT technology; Receive the influence of external magnetic field hardly; High precision, high stability, high reliability that long-term free of discontinuities collection is measured have been guaranteed; The pincerlike current sensor of ETCR5100 needn't break off circuit-under-test in the process of measuring, non-cpntact measurement, safety, quick; Output current and voltage signal arbitrarily.
Behind the voltage and current signal process transport and placing device 4 and A/D converter 5 that signal pickup assembly is gathered; The inside dual port RAM of CPU7 is read in the data timesharing; Carry out the analyzing and processing of Fast Fourier Transform (FFT) pre-service and information by CPU7; RAM carries out buffer memory to result simultaneously, carries out result's output through LCDs 9 and printer 8 after data acquisition process finishes, and total system controls through keyboard 11.
Transport and placing device 4 is used for signal source and A/D converter 5 are separated, and provides low-resistance to drive for A/D converter 5, the input voltage range coupling that provides certain gain to make input signal and A/D converter 5 simultaneously.Transport and placing device 4 has adopted the TLV2372 of TI company, all changes the voltage of input and the current signal that collects into the voltage AC signal of 0-2V.The A/D converter chip has been selected the AD7686 of ADI company for use.
For the effect that guarantees that magnetic is isolated, magnetic isolation module 6 has adopted the ADUM1420 four-way isolating door driver of ADI company
technology.The introducing of magnetic isolation module 6 has been avoided because voltage signal, current signal are gathered respectively, and each other the interference of generation different with the WV of CPU of the voltage of the conversion of signal.
The continuous sampling data that the Fast Fourier Transform (FFT) pre-service is sent here A/D converter 5 are carried out buffer memory, carry out conversion then, at last the data after the conversion are carried out subsequent treatment; The Fast Fourier Transform (FFT) pre-service is to directly carrying out 1024 point quick Fourier transform operations through two channel parallel datas behind the A/D converter 5.
CPU7 is the nucleus module of whole electrified tester for zinc oxide arrester; It is responsible for receiving electric current and the voltage signal that comes from lightning arrester; And the two is carried out analyzing and processing, and the LCDs output or the printer that under the condition of keyboard drive, carry out the result print.CPU7 adopts PHILIPS monolithic 32 8-digit microcontroller LPC2138 processors.
Claims (2)
1. an electrified tester for zinc oxide arrester comprises signals collecting and converting system, signal Processing and display system, power-supply system; It is characterized in that said signals collecting and converting system are divided into current signal collection and conversion and voltage signal acquisition and two circuits of conversion; Said current signal collection comprises hook type current transformer, transport and placing device, the A/D converter that links to each other successively with conversion line; Said voltage signal acquisition comprises voltage transformer (VT), transport and placing device, the A/D converter that links to each other successively with conversion line; Said signal Processing and display system comprise CPU, and CPU is connected with printer, LCDs, storer, keyboard respectively; Said power-supply system comprises two-way magnetic insulating power supply and battery; Said two-way magnetic insulating power supply links to each other with converting system with signals collecting, and battery links to each other with keyboard.
2. electrified tester for zinc oxide arrester according to claim 1 is characterized in that said electrified tester for zinc oxide arrester comprises the magnetic isolation module; Said magnetic isolation module connects A/D converter and CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201430126U CN202494743U (en) | 2012-04-06 | 2012-04-06 | Electrified tester for zinc oxide lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201430126U CN202494743U (en) | 2012-04-06 | 2012-04-06 | Electrified tester for zinc oxide lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202494743U true CN202494743U (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201430126U Expired - Fee Related CN202494743U (en) | 2012-04-06 | 2012-04-06 | Electrified tester for zinc oxide lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202494743U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771719A (en) * | 2016-11-28 | 2017-05-31 | 唐恩(厦门)电气有限公司 | A kind of metal oxide arrester tester |
| CN112557725A (en) * | 2020-12-04 | 2021-03-26 | 上海航天控制技术研究所 | Simple isolation voltage detection circuit |
-
2012
- 2012-04-06 CN CN2012201430126U patent/CN202494743U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771719A (en) * | 2016-11-28 | 2017-05-31 | 唐恩(厦门)电气有限公司 | A kind of metal oxide arrester tester |
| CN112557725A (en) * | 2020-12-04 | 2021-03-26 | 上海航天控制技术研究所 | Simple isolation voltage detection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20130406 |