CN201247310Y - Tester for composite error of current mutual inductor - Google Patents
Tester for composite error of current mutual inductor Download PDFInfo
- Publication number
- CN201247310Y CN201247310Y CNU2008200654250U CN200820065425U CN201247310Y CN 201247310 Y CN201247310 Y CN 201247310Y CN U2008200654250 U CNU2008200654250 U CN U2008200654250U CN 200820065425 U CN200820065425 U CN 200820065425U CN 201247310 Y CN201247310 Y CN 201247310Y
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- China
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- tester
- current
- card
- data gathering
- composite error
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- Expired - Lifetime
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Abstract
The utility model relates to a composite error tester of a current transformer, which is characterized by comprising a preamplification signal modulating module, a quick-speed data gathering card and a portable industrial control computer, wherein the preamplification signal modulating module is connected with the data gathering card through a single-core coaxial shielding cable, and the data gathering card is connected with the portable industrial control computer through a PCI bus. Standard current and spill current in a composite error testing circuit of a transformer are respectively switched in a corresponding channel of a preamplification box, which are output to the data gathering card after passing through an amplifying and filtering and protecting circuit after conversing to voltage signals by a precision sampling resistance, and a digital gathering card outputs digital signals, and the digital signals are output after analyzing and processing by software of an host computer. The composite error tester can display signal waveforms in real time, and calculates out and outputs root mean square values of each circle of standard current and spill current.
Description
Technical field
The utility model is the measurement novel portable measurement mechanism that is applied to power industry Current Transformer combination misalignment and safety coefficient.
Background technology
The current transformer combination misalignment testing tool that estimated current mutual inductor quality inspection unit is adopted mostly is that two tables are directly measured or based on the simple acquisition system of C51 single-chip microcomputer framework.Existing these measuring equipment ubiquity sampling rates are low, and precision is not high, and long to the test period requirement, real-time is poor, can't show the shortcoming of dynamic waveform and instant storage mass data, are unfavorable for testing identifying that use and related side are to carrying out of studying.
Summary of the invention
For a change existing mutual inductor combination misalignment checkout equipment precision is low, real-time is poor, can't show shortcomings such as dynamic waveform and instant storage mass data, the purpose of this utility model is to develop a kind of current transformer combination misalignment tester based on the DAQ capture card, can quick and precisely must measure the mutual inductor combination misalignment, and dynamically show, storage coherent signal waveform, thereby improved measure accuracy, greatly reduce experimentation cost.
The technical solution of the utility model is: current transformer combination misalignment tester, it is characterized in that: it is made up of preposition amplification both signal condition module, fast data capture card, portable industrial pc three parts, both the signal condition module was by single core coaxial shielding cable and data acquisition card connection in preposition amplification, and data collecting card is connected with portable industrial pc by pci bus.
Aforesaid current transformer combination misalignment tester is characterized in that: data collecting card is 16 A/D conversions, the acquisition rate of 100k/s, the input of 4 tunnels analogies, corresponding gain range ± 0.1V, ± 0.2V, ± 0.5V, ± 1V, ± 2V, ± 4V, ± 10V, ± 20V.
Aforesaid current transformer combination misalignment tester is characterized in that: all measure floating ground, loop.
Beneficial effect: owing to adopted fast data capture card and portable industrial pc, used the software of Labview exploitation, so can quick and precisely must measure the mutual inductor combination misalignment, and dynamically show, storage coherent signal waveform, thereby improved measure accuracy, greatly reduce experimentation cost.
Description of drawings
Fig. 1 is the current transformer combination misalignment tester structured flowchart of the utility model embodiment.
Fig. 2 is the device connection block diagram of Fig. 1 embodiment.
Fig. 3 is the software flow pattern of Fig. 1 embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
The current transformer combination misalignment tester of the utility model embodiment as shown in Figure 1, it is made up of preposition amplification both signal condition module, fast data capture card, portable industrial pc three parts, both the signal condition module was by single shaft shielded cable and data acquisition card connection in preposition amplification, and the data acquisition card connection is connected with portable industrial pc by pci bus.
Device connects as shown in Figure 2; according to GB 1208-2006 and IEC 60044-1 standard; normalized current in the current transformer metering circuit and spill current are inserted both respective channel of signal condition module of preposition amplification respectively; be converted into behind the voltage signal again through importing data collecting card after amplification filtering and the holding circuit by accurate sample resistance, export after by digital collection card output digital signal again through the upper computer software analyzing and processing.Its workflow as shown in Figure 3.
The software of measuring adopts the Labview exploitation, has combination misalignment and calculates and the current waveform playback function.Calculate outputting standard electric current and each cycle root-mean-square value of spill current.
Referring to Fig. 3, the measurement flow process of the current transformer combination misalignment tester of the utility model embodiment is as follows:
The operation upper computer software is provided with gain shift earlier and the mode of setting out; Click begins to measure, and enters the triggering waiting status, and it is bright to trigger " wait " light; When satisfying the signal generation that is provided with, instrument is gathered, in real time display waveform and the root-mean-square value that calculates each periodic signal.Testing crew is is suitably accepted or rejected according to waveform and data, obtains the combination misalignment value and the instrument safety coefficient that need.
The utility model embodiment is according to the measuring accuracy requirement to measurement of correlation 0.5% of GB 1208-2006 and IEC 60044-1 standard, leave in performance under the situation of certain nargin, determine the performance parameter of capture card: 16 A/D conversions, the acquisition rate that 100k/s is above, the input of 4 tunnels analogies.Finally we have selected the PCI4516 data collecting card, corresponding gain range ± 0.1V, ± 0.2V, ± 0.5V, ± 1V, ± 2V, ± 4V, ± 10V, ± 20V.
Normalized current and spill current are respectively by 0.1 Ω sample resistance, by preposition amplification filtering, data collecting card, provide at last 25 cycle root-mean-square valves (actual can do the continuous sampling of 0.3s, i.e. 15 cycle root-mean-square valves) of two-way electric current respectively according to request for utilization by host computer combination misalignment Survey Software.
The current transformer combination misalignment tester of present embodiment is measured composition of prime amplifier by one of portable machine.
The utility model can quick and precisely must be measured the mutual inductor combination misalignment, and dynamically shows, storage coherent signal waveform, thereby improved measure accuracy, greatly reduce experimentation cost.
The current transformer combination misalignment tester and the prior art performance of present embodiment are compared as follows:
| Prior art | Present embodiment | |
| Sampling rate: | Below every passage 1k/s | Every path 10～100k/s is adjustable |
| The accuracy of measuring: | 1 grade | 0.5 level |
| The sampling minimum length: | 0.5s more than | 0.1s |
| Experimentation cost: | Often damaged instrument by the ground wire counterattack; Test period is long, causes the power supply maintenance cycle short | There is not ground wire counterattack problem; Reduce and test conduction time more than 40%, prolong the power supply maintenance cycle |
Claims (3)
1, current transformer combination misalignment tester, it is characterized in that: it is made up of preposition amplification both signal condition module, fast data capture card, portable industrial pc three parts, both the signal condition module was by single core coaxial shielding cable and data acquisition card connection in preposition amplification, and data collecting card is connected with portable industrial pc by pci bus.
2, current transformer combination misalignment tester as claimed in claim 1 is characterized in that: data collecting card is 16 A/D conversions, the acquisition rate of 100k/s, the input of 4 tunnels analogies, corresponding gain range ± 0.1V, ± 0.2V, ± 0.5V, ± 1V, ± 2V, ± 4V, ± 10V, ± 20V.
3, current transformer combination misalignment tester as claimed in claim 1 or 2 is characterized in that: all measure floating ground, loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200654250U CN201247310Y (en) | 2008-01-23 | 2008-01-23 | Tester for composite error of current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200654250U CN201247310Y (en) | 2008-01-23 | 2008-01-23 | Tester for composite error of current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201247310Y true CN201247310Y (en) | 2009-05-27 |
Family
ID=40731130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200654250U Expired - Lifetime CN201247310Y (en) | 2008-01-23 | 2008-01-23 | Tester for composite error of current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201247310Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736052A (en) * | 2011-04-14 | 2012-10-17 | 上海创力集团股份有限公司 | Current transformer fault self-detection apparatus |
-
2008
- 2008-01-23 CN CNU2008200654250U patent/CN201247310Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736052A (en) * | 2011-04-14 | 2012-10-17 | 上海创力集团股份有限公司 | Current transformer fault self-detection apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE NETWORK ELECTRIC POWER RESEARCH INSTITUTE Owner name: WUHAN NARI CO., LTD., STATE GRID ELECTRIC POWER RE Free format text: FORMER OWNER: WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID Effective date: 20100702 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100702 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 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160718 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 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 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090527 |
|
| CX01 | Expiry of patent term |