CN201402317Y - Verifying unit for resistive current tester of zinc oxide arrester - Google Patents
Verifying unit for resistive current tester of zinc oxide arrester Download PDFInfo
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- CN201402317Y CN201402317Y CN2009200061974U CN200920006197U CN201402317Y CN 201402317 Y CN201402317 Y CN 201402317Y CN 2009200061974 U CN2009200061974 U CN 2009200061974U CN 200920006197 U CN200920006197 U CN 200920006197U CN 201402317 Y CN201402317 Y CN 201402317Y
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- power amplifier
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 31
- 230000003321 amplification Effects 0.000 claims description 38
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 38
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 5
- 230000036541 health Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 238000003491 array Methods 0.000 abstract 1
- 229960001296 zinc oxide Drugs 0.000 description 26
- 238000005259 measurement Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000013459 approach Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 238000012795 verification Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000013178 mathematical model Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Testing Electric Properties And Detecting Electric Faults (AREA)
- Thermistors And Varistors (AREA)
Abstract
The utility model relates to a verifying unit for a resistive current tester of a zinc oxide arrester, which is characterized in that the verifying unit comprises a computer, a two-channel D/A converter and a two-channel program control precision power amplifier unit, wherein the computer gives the voltage and current arrays of digital quantities, the waveshape length and the waveshape frequency parameters; the two-channel D/A converter is connected with the computer through a USB interface, and is used for converting the digital quantity parameters into analog quantities; two-channel signalsof the two-channel D/A converter are output synchronously; and the two-channel program control precision power amplifier unit is connected with the two-channel D/A converter, is used for conditioningand amplifying signals output by D/A, and consists of a voltage amplifying unit and a current amplifying unit. The utility model adopts the computer intelligent control technology and the digital design principle, and has the advantages of high measuring accuracy and convenient processing and storage of measured data. The verifying unit can be used for conveniently setting various verifying parameters such as reference voltage, full current, resistive current, capacitative current and the like, and can also be used for setting the triple-harmonic resistive current.
Description
Technical field
The utility model belongs to the power equipment technical field of measurement and test, is specifically related to a kind of zinc oxide lightning arrester block property current tester calibration equipment, is applicable to the accuracy of measurement of verification zinc oxide lightning arrester block property current tester.
Background technology
Zinc-Oxide Arrester is the visual plant that guarantees safe operation of power system, zinc oxide lightning arrester block property current tester flows through the leakage current of zinc oxide lightning arrester insulation by measurement, thereby can assess the insulation status of Zinc-Oxide Arrester, have crucial meaning for the safe operation of system.
At present mainly adopt resistance, capacity cell and linked method for the verification of zinc oxide lightning arrester block property current tester, promptly adopt the operation conditions of hardware approach simulation Zinc-Oxide Arrester, this method need insert three reometers and detect in circuit, its disadvantage is to be difficult to simulate the third harmonic current in resistance property that the Zinc-Oxide Arrester nonlinear characteristic is produced, and the third harmonic current in resistance property is an important parameter of reaction zinc oxide lightning arrester insulation, simultaneously, the stability of this method also is to be difficult to guarantee.
Summary of the invention
In order to overcome the shortcoming of the operation conditions that adopts hardware approach simulation Zinc-Oxide Arrester, the utility model provides a kind of zinc oxide lightning arrester block property current tester calibration equipment, this device adopts the computer intelligence control technology, the Design of digital principle, accuracy of measurement height, measurement data are convenient to handle and preserve.This device can be provided with various checking parameters such as reference voltage, total current easily, current in resistance property, and capacity currents etc. can also carry out the setting of third harmonic current in resistance property.
The way of thinking of the present utility model is: according to the following mathematical model of the zinc oxide lightning arrester block property of setting up among the national standard DL/T987-2005 " zinc oxide lightning arrester block property current tester technical conditions ",
u＝USinωt (1)
i＝I
R1Sinωt+I
R3Sin(3ωt+π)+I
C1Sin(ωt+π/2) (2)
In the formula:
U---reference voltage
U---reference voltage peak value
ω---first-harmonic angular frequency, ω=2 π f
I---total current
I
R1---the resistive fundamental current peak value
I
R3---resistive triple harmonic current peak value
I
C1---capacitive fundamental current peak value
With synthetic reference voltage signal v of software engineering and full current signal i, by high-precision d/a converter of computer control, reference voltage and circuital digital signal that software is synthetic are converted into simulating signal, nurse one's health through program control accurate power amplifier unit and amplify the standard signal of back as the verification zinc oxide lightning arrester block property current tester.
Technical solutions of the utility model are: the calibration equipment of zinc oxide lightning arrester block property current tester is characterized in that: comprise computing machine, two passage D/A converters and the program control accurate power amplifier unit of two passages; Computing machine provides voltage and current array, the length of waveform, the waveform frequency parameter of digital quantity, two passage D/A converters are connected with computing machine by USB interface, be used for the digital quantity Parameters Transformation is become analog quantity, two channel signals of two passage D/A converters are exported synchronously; The program control accurate power amplifier unit of two passages is connected with two passage D/A converters, is used for the signal of D/A output being nursed one's health and being amplified, and the program control accurate power amplifier unit of two passages is made of voltage amplification unit and current amplification unit.
The calibration equipment of aforesaid zinc oxide lightning arrester block property current tester, it is characterized in that: two passage D/A converters comprise digital signal processor DSP, communicating circuit USB, Programmable Logic Device CPLD, digital-to-analog conversion interface circuit D/A, the 256KB static memory, 8 bit digital quantity I/O circuit; Its annexation is: communicating circuit USB is connected with the serial ports of digital signal processor DSP, the parallel bus of digital signal processor DSP connects digital-to-analogue conversion interface circuit D/A, the parallel bus of digital signal processor DSP connects the 256KB static memory, the control bus of digital signal processor DSP connects Programmable Logic Device CPLD, and Programmable Logic Device CPLD connects 8 bit digital quantity I/O circuit.
The calibration equipment of aforesaid zinc oxide lightning arrester block property current tester is characterized in that: linear modulate circuit, constant-current source circuit and power amplifier that current amplification unit comprises pre-amplification circuit, links to each other with pre-amplification circuit; The current signal of D/A output at first enters pre-amplification circuit, input end through the current signal wiring modulate circuit after the pre-amplification circuit amplification, the output current signal of linear modulate circuit connects the input end of constant-current source circuit, and the output current signal of constant-current source circuit connects the input end of power amplifier;
Linear modulate circuit, constant voltage power supply circuit, power amplifier and booster circuit that the voltage amplification unit comprises pre-amplification circuit, links to each other with pre-amplification circuit; The voltage signal of D/A output at first enters pre-amplification circuit, input end through the voltage signal wiring modulate circuit after the pre-amplification circuit amplification, the output voltage signal of linear modulate circuit connects the input end of constant voltage power supply circuit, the output voltage signal of constant voltage power supply circuit connects the input end of power amplifier, and the output voltage signal of power amplifier connects the input end of booster circuit.
The utility model has the advantages that: the utility model adopts software synthetic normal voltage signal source and normalized current signal source, operation conditions to equipment is simulated, produce one group of relevant normal voltage, current signal, by changing the amplitude and the phase differential of signal, various checking parameters such as reference voltage, total current can be set easily, current in resistance property, capacity currents etc. can also carry out the setting of third harmonic current in resistance property.The utility model adopts the Design of digital principle, the accuracy of measurement height, and measurement data is convenient to handle and preserve.
Description of drawings
Fig. 1, the calibration equipment fundamental diagram of the utility model embodiment.
Fig. 2, the calibration equipment structural representation of the utility model embodiment.
Fig. 3 is current amplification unit, the voltage amplification element circuit block diagram among Fig. 2.
Fig. 4 is the software synthetic schemes that adopts among Fig. 1 embodiment.
Embodiment
Referring to Fig. 1.Calibration equipment principle of work such as Fig. 1 of the utility model embodiment, computing machine is according to the mathematical model of setting up, send the reference voltage of standard, the total current digital signal is to the D/A unit, be transformed into analog signal transmission to power amplifier unit by D/A, power amplifier unit is with voltage, current signal offers detected device after amplifying, owing to adopted the pure software control mode, the setting of standard signal such as reference voltage, total current, current in resistance property, capacity current, the third harmonic current in resistance property can pass through software setting, and display shows the standard value and the relevant voltage of output synchronously, current waveform figure.
Referring to Fig. 2.Realize the zinc oxide lightning arrester block property current tester calibration equipment of such scheme, special-purpose TT﹠C software based on the Visiul6.0 programming, high-precision d/a converter, the digital quantity Parameters Transformation of software setting is become analog quantity, the program control accurate power amplifier unit of two passages, constitute comprising one tunnel voltage amplification unit and one road current amplification unit, the signal of D/A output is nursed one's health and amplified.
In the present embodiment, special-purpose TT﹠C software based on the Visiul6.0 programming, adopt window XP operating system, menu in Chinese, mathematical model according to zinc oxide lightning arrester insulation is set up associated databases, set in advance detected parameters such as reference voltage, total current, current in resistance property, capacity current, third harmonic current in resistance property etc. in the menu, also have the user simultaneously parameter function is set.
In the present embodiment, high precision two passage D/A converters, two channel signals are exported synchronously, master controller adopts high speed digital signal processor DSP, the communicating circuit USB that is connected with computing machine, two tunnel accurate 16 D/A chips, the 256KB static memory, 8 bit digital quantity I/O circuit.
Current amplification unit comprises pre-amplification circuit, the linear modulate circuit that links to each other with pre-amplification circuit, constant-current source circuit, power amplifier, maximum output current 20mA.The voltage amplification unit comprises pre-amplification circuit, the linear modulate circuit that links to each other with pre-amplification circuit, constant voltage power supply circuit, power amplifier, booster circuit, maximum output voltage 200V.
Among the utility model embodiment with the flow process of synthetic reference voltage signal v of software engineering and full current signal i as shown in Figure 4.
Step with synthetic reference voltage signal of software engineering and full current signal is:
Passage one: input reference voltage effective value;
Be divided into some spots according to reference voltage amplitude and wavelength;
Discrete sine cycle AC signal also deposits the each point magnitude of voltage in array;
Passage two: input resistive fundamental current peak value, resistive triple harmonic current peak value and capacity current peak value;
Be divided into some spots according to current amplitude, harmonic component and wavelength;
Discrete non-sinusoidal cycle AC signal also deposits the each point current value in array;
The voltage and current array, the length of waveform, the waveform frequency that gather two passages;
Send to two passage D/A.
Below provide the actual measurement example of a contrast.Promptly, select a zinc oxide lightning arrester block property current tester, adopt resistance, capacity cell and linked method, promptly adopt the operation conditions of hardware approach simulation Zinc-Oxide Arrester to detect, detect with the operation conditions of the Zinc-Oxide Arrester of simulating with software approach of the present utility model, two kinds of results are compared, the advantage of this method and device is described.
Table 1 adopts the testing result of hardware approach
| Project | U(V) | I(mA) | I R1(mA) | I C1(mA) |
| Standard value | 100 | 1.00 | 0.20 | 0.98 |
| Measured value | 99.3 | 0.98 | 0.17 | 0.96 |
Table 2 adopts the testing result of the utility model software approach
| Project | U(V) | I(mA) | I R1(mA) | I C1(mA) | I R3(mA) |
| Standard value | 100 | 1.00 | 0.20 | 1.00 | 0.06 |
| Measured value | 99.1 | 0.98 | 0.18 | 0.97 | 0.05 |
More as can be known, table 1 adopts the operation conditions of hardware approach simulation Zinc-Oxide Arrester, can not produce the third harmonic current in resistance property, therefore can not carry out verification to this function of detected instrument from the detection data of table 1 and table 2.And table 2 adopts the operation conditions of the utility model software approach simulation Zinc-Oxide Arrester, can produce the third harmonic current in resistance property, therefore can realize this function of detected instrument is carried out verification.
Claims (3)
1, the calibration equipment of zinc oxide lightning arrester block property current tester is characterized in that: comprise computing machine, two passage D/A converters and the program control accurate power amplifier unit of two passages; Computing machine provides voltage and current array, the length of waveform, the waveform frequency parameter of digital quantity, two passage D/A converters are connected with computing machine by USB interface, be used for the digital quantity Parameters Transformation is become analog quantity, two channel signals of two passage D/A converters are exported synchronously; The program control accurate power amplifier unit of two passages is connected with two passage D/A converters, is used for the signal of D/A output being nursed one's health and being amplified, and the program control accurate power amplifier unit of two passages is made of voltage amplification unit and current amplification unit.
2, the calibration equipment of zinc oxide lightning arrester block property current tester as claimed in claim 1, it is characterized in that: two passage D/A converters comprise digital signal processor DSP, communicating circuit USB, Programmable Logic Device CPLD, digital-to-analog conversion interface circuit D/A, the 256KB static memory, 8 bit digital quantity I/O circuit; Its annexation is: communicating circuit USB is connected with the serial ports of digital signal processor DSP, the parallel bus of digital signal processor DSP connects digital-to-analogue conversion interface circuit D/A, the parallel bus of digital signal processor DSP connects the 256KB static memory, the control bus of digital signal processor DSP connects Programmable Logic Device CPLD, and Programmable Logic Device CPLD connects 8 bit digital quantity I/O circuit.
3, the calibration equipment of zinc oxide lightning arrester block property current tester as claimed in claim 1 or 2 is characterized in that: linear modulate circuit, constant-current source circuit and power amplifier that current amplification unit comprises pre-amplification circuit, links to each other with pre-amplification circuit; The current signal of D/A output at first enters pre-amplification circuit, input end through the current signal wiring modulate circuit after the pre-amplification circuit amplification, the output current signal of linear modulate circuit connects the input end of constant-current source circuit, and the output current signal of constant-current source circuit connects the input end of power amplifier;
Linear modulate circuit, constant voltage power supply circuit, power amplifier and booster circuit that the voltage amplification unit comprises pre-amplification circuit, links to each other with pre-amplification circuit; The voltage signal of D/A output at first enters pre-amplification circuit, input end through the voltage signal wiring modulate circuit after the pre-amplification circuit amplification, the output voltage signal of linear modulate circuit connects the input end of constant voltage power supply circuit, the output voltage signal of constant voltage power supply circuit connects the input end of power amplifier, and the output voltage signal of power amplifier connects the input end of booster circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200061974U CN201402317Y (en) | 2008-07-01 | 2009-03-13 | Verifying unit for resistive current tester of zinc oxide arrester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820068205 | 2008-07-01 | ||
| CN200820068205.3 | 2008-07-01 | ||
| CN2009200061974U CN201402317Y (en) | 2008-07-01 | 2009-03-13 | Verifying unit for resistive current tester of zinc oxide arrester |
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| Publication Number | Publication Date |
|---|---|
| CN201402317Y true CN201402317Y (en) | 2010-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200061974U Expired - Lifetime CN201402317Y (en) | 2008-07-01 | 2009-03-13 | Verifying unit for resistive current tester of zinc oxide arrester |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854346A (en) * | 2011-07-01 | 2013-01-02 | 上海思盛信息科技事务所 | Leakage current reference source signal combining device for lightning arrester |
| CN104808166A (en) * | 2015-05-18 | 2015-07-29 | 国网上海市电力公司 | Calibration method for resistive current measurement and calibration device thereof |
| CN106645835A (en) * | 2016-12-22 | 2017-05-10 | 唐恩(厦门)电气有限公司 | Signal generating device for lightning arrester verification and testing |
-
2009
- 2009-03-13 CN CN2009200061974U patent/CN201402317Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854346A (en) * | 2011-07-01 | 2013-01-02 | 上海思盛信息科技事务所 | Leakage current reference source signal combining device for lightning arrester |
| CN104808166A (en) * | 2015-05-18 | 2015-07-29 | 国网上海市电力公司 | Calibration method for resistive current measurement and calibration device thereof |
| CN106645835A (en) * | 2016-12-22 | 2017-05-10 | 唐恩(厦门)电气有限公司 | Signal generating device for lightning arrester verification and testing |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUHAN NANRUI CO,. LTD. OF STATE GRID ELECTRIC POWE Free format text: FORMER OWNER: STATE GRID WUHAN HIGH VOLTAGE RESEARCH INSTITUTE Effective date: 20100604 Owner name: STATE NETWORK ELECTRIC POWER RESEARCH INSTITUTE |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100604 Address after: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Co-patentee after: State Grid Electric Power Research Insititute Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee before: Guowang Wuhan High Voltage Inst |
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| ASS | Succession or assignment of patent right |
Owner name: SHANXI ELECTRIC POWER CORPORATION STATE GRID ELECT Free format text: FORMER OWNER: STATE GRID ELECTRIC POWER RESEARCH INSITITUTE Effective date: 20130626 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Guo Heng Inventor after: Wang Jian Inventor after: Yang Yonghui Inventor after: Xie Yan Inventor after: Song Shuting Inventor after: Wei Bin Inventor after: Niu Biao Inventor before: Guo Heng Inventor before: Wang Jian Inventor before: Yang Yonghui Inventor before: Xie Yan |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: GUO HENG WANG JIAN YANG YONGHUI XIE YAN TO: GUO HENG WANG JIAN YANG YONGHUI XIE YAN SONG SHUTING WEI BIN NIU BIAO |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130626 Address after: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee after: Shanxi Electric Power Comany Patentee after: State Grid Electric Power Research Insititute Patentee after: State Grid Corporation of China Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee before: State Grid Electric Power Research Insititute |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20160629 Address after: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee after: Shanxi Electric Power Comany Patentee after: State Grid Corporation of China Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Patentee before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee before: Shanxi Electric Power Comany Patentee before: State Grid Electric Power Research Insititute Patentee before: State Grid Corporation of China |
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| CX01 | Expiry of patent term |
Granted publication date: 20100210 |
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| CX01 | Expiry of patent term |