CN201555879U - Parameter measuring instrument of induction circuit - Google Patents
Parameter measuring instrument of induction circuit Download PDFInfo
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- CN201555879U CN201555879U CN2009200489845U CN200920048984U CN201555879U CN 201555879 U CN201555879 U CN 201555879U CN 2009200489845 U CN2009200489845 U CN 2009200489845U CN 200920048984 U CN200920048984 U CN 200920048984U CN 201555879 U CN201555879 U CN 201555879U
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- 230000006698 induction Effects 0.000 title claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 22
- 230000005611 electricity Effects 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims description 20
- 238000005070 sampling Methods 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 238000010205 computational analysis Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005283 ground state Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004353 relayed correlation spectroscopy Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses a parameter measuring instrument of induction circuit, which comprises a partial pressure device, a current detector, an automatic switching circuit, a signal processing circuit and industrial control computer processing system, and is characterized in that, firstly, the partial pressure device consists of a plurality of linear resistance-capacitance small units; secondly, the current detector adopts a magnetic balance Hall current sensor; thirdly, the automatic switching circuit adopts a photo coupler to output control signal automatically so as to enable a relay to switch data channels, thereby measuring the induced voltage and the current signal step by step, which avoids the measurement error brought by data out of sync; fourthly, the signal processing unit adopts an anti-aliasing filter circuit with a function of eliminating the higher harmonic wave in the signal; fifthly, the instrument adopts the industrial control computer processing system. The utility model overcomes the defects of the current instrument that the measuring precision is poor and the instrument can't work normally under the influence of the high induced electricity, requires no external power supply signal, has higher measuring precision as the induced electricity increases, and has the advantages of simple wiring, convenient use, safety and reliability.
Description
Technical field
The utility model relates to a kind of line parameter circuit value tester.Belong to electric system high-tension apparatus technical field of measurement and test.
Background technology
As the basis of trend and protection setting valve, the accuracy of line parameter circuit value is most important.Along with day being becoming tight of circuit corridor, more and more general with bar many times, parallel circuit.Strong with the electromagnetic coupled between tower many times or the parallel circuit, be subjected to the effect of working line induced electricity, the line parameter circuit value test of dead line is difficulty very, and how overcoming the induced electricity influence is the key that line parameter circuit value is accurately measured.Existing shift frequency parameter tester often can't operate as normal because of the induced electricity height, and tradition is injected high-pressure process proving installation heaviness, operates very inconveniently, and is subjected to the place limitation big.
The utility model content
The purpose of this utility model provides a kind of instrument that utilizes the automatic measurement circuit parameter of induced electricity, execute power supply signal outside this instrument need not, wiring is simple, and is safe and reliable, obvious to the electromagnetic coupled impact effect of eliminating circuit, be applicable to the occasion that the adjacent lines induced voltage is higher and can not have a power failure.
The utility model is to take following technical scheme to realize:
A kind of induced electricity line parameter circuit value measuring instrument, it comprises bleeder mechanism, current detector, automatic switch-over circuit, signal processing circuit, industrial control computer disposal system, it is characterized in that:
(1) bleeder mechanism is made up of several linear resistance-capacitance type junior units, and its effect is to regulate range automatically according to the inductive voltage value of on-the-spot circuit to carry out suitable step-down, and with the input range of coupling instrument, its input end with the automatic switch-over circuit voltage segment is connected;
(2) current detector is to adopt the magnetic balance type Hall current sensor, and its effect is that the induction current with circuit detects and regulates, and with the input range of coupling instrument, and exports through follow circuit; Its input end with the automatic switch-over circuit current segment is connected;
(3) automatic switch-over circuit adopts optocoupler automatic output control signal, makes relay switch data passage, with step measurement induced voltage and current signal, avoids the asynchronous measuring error of bringing of data, comprises voltage segment and current segment passage; It is connected with the signal processing circuit input port, so that external signal is inputed to signal processing;
(4) signal processing circuit adopts the frequency overlapped-resistable filter circuit, after the voltage and current signal carried out filtering, be input to multifunctional data acquisition card and carry out data sampling, its effect is the higher hamonic wave in the erasure signal, and its input port with the industrial control computer disposal system is connected;
(5) industrial control computer disposal system, it comprises multifunctional data acquisition card, industrial control computer and LCDs, its effect is that the sampling of control signal, computational analysis and processing and output are shown.
Aforesaid induced electricity line parameter circuit value measuring instrument is characterized in that: described bleeder mechanism is the resistance-capacitance type voltage divider.According to the actual sensed magnitude of voltage at scene, can range be set by the induced voltage input range.
Aforesaid induced electricity line parameter circuit value measuring instrument is characterized in that: described current detector adopts the magnetic balance type Hall current sensor, the follow circuit of current detection circuit for being made of operational amplifier.According to presence induced current measurement requirement, can select linearity scope and response time.
Aforesaid induced electricity line parameter circuit value measuring instrument, described industrial control computer disposal system possesses controlling of sampling, digital filtering, computational analysis and processing, output Presentation Function, and its core is to adopt preface component decomposition algorithm computational scheme parameter.
The utility model mainly comprises five parts: bleeder mechanism, current detector, automatic switch-over circuit, signal processing circuit, industrial control computer disposal system.
The effect of bleeder mechanism is that line influence voltage is carried out suitable step-down, with the sampling input range of coupling multifunctional data acquisition card; The effect of current detector is that size is measured and regulated to induction current, to satisfy the sampling input range of multifunctional data acquisition card; The effect of signal switching circuit is that the automatic switchover passage is with step measurement induced voltage and induction current; The effect of signal processing circuit is the higher hamonic wave in the filtering sampled signal; The effect of industrial control computer disposal system is processing capacities such as control sampling, digital filtering, computational analysis, output demonstration;
The test process of the utility model line parameter circuit value tester is:
(1) the ground connection disconnecting link of operation dead line, circuit one end is changed to open-circuit condition, one end keeps ground state, selected internal power reference phase, outside not, execute under the prerequisite of signal source, utilize voltage divider and waveform to survey the three-phase open circuit induced voltage of recording device measurement with dead line in tower or the parallel many loop lines road;
(2) the ground connection disconnecting link of operation dead line keeps ground state with the circuit two ends, and selected internal power reference phase utilizes current detector and waveform to survey the three-phase shortcircuit induction current that recording device is measured dead line;
(3) handle by software and hardwares such as filtering, signal Processing, the decomposition of preface component, draw zero sequence and positive sequence voltage, electric current, thereby draw positive sequence, the zero sequence impedance of dead line.
The beneficial effect that the utility model reached:
The utility model has overcome original instrument and has been subjected to high induced electricity to influence measuring accuracy difference or shortcoming that can't operate as normal, has to need not the outer advantages such as the high more measuring accuracy of power supply signal, induced electricity is high more, wiring is simple, and is esy to use, safe and reliable of executing.
Description of drawings
Fig. 1 system construction drawing of the present utility model;
Fig. 2 division module circuit diagram of the present utility model;
Fig. 3 current detection circuit figure of the present utility model;
The traffic filter circuit diagram that this use of Fig. 4 is novel;
Fig. 5 automatic switch-over circuit figure of the present utility model;
Fig. 6 flow chart of data processing of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises division module, current detector, signal processing circuit, automatic switch-over circuit, industrial control computer disposal system.The bleeder mechanism effect is an input range of regulating induced voltage; The current detector effect is induction current to be regulated zoom into suitable input reference signal; The effect of signal processing circuit is the higher hamonic wave in the filtering sampled signal; The automatic switch-over circuit effect is that rapid switched voltage and current channel carry out step measurement; The effect of industrial control computer disposal system is digital filtering, computational analysis and the output demonstration of the voltage and current signal being carried out digital sample, sampled signal.
The division module of this example is to adopt the resistance-capacitance type bleeder circuit of the parallel connection of R and C, scope according to input voltage value, connect U11, U12, U13, U14 joint from big to small respectively by 5000/20,1000/20,500/20,200/20 range, improve the measuring accuracy of induced voltage, as shown in Figure 2.
What this example current detector adopted is the magnetic balance type current sensor, the V+ of the sensor of current detector connects positive supply, V-connects negative supply, M termination sampling resistor, sampling resistor other end ground connection, through a follow circuit that is made of operational amplifier, output voltage signal is U1, as shown in Figure 3 again;
The signal processor of this example adopts the aliasing filter circuit, and the SRIN of filter circuit connects input signal, and the SROUT of filter circuit exports filtered signal and gives multifunctional data acquisition card, as shown in Figure 4.
The automatic switch-over circuit of this example adopts optocoupler output control signal, makes relay automatic switchover passage, with step measurement induced voltage and current signal.Optocoupler OP1, OP2, OP3 export A, B, C three-phase control signal respectively, the break-make of pilot relay RELAY, as shown in Figure 5.
In the industrial control computer disposal system of this example, what multifunctional data acquisition card adopted is the PCI-2102A integrated card, directly inserts PCI slot and industrial computer and carries out exchanges data; Controller adopts the X86 hardware platform and moves WINDOWS XP operating system, after software programming, connects multifunctional data acquisition card by pci bus, realizes the automatic collection and the control of multi-channel data; Display module adopts LCD, directly connects the output bus of industrial control computer.The program circuit of software as shown in Figure 6.
In addition to the implementation, all employings are equal to the technical scheme that form obtained of replacement or equivalent transformation, all drop within the protection domain of the present utility model.
Claims (3)
1. induced electricity line parameter circuit value measuring instrument, it comprises bleeder mechanism, current detector, automatic switch-over circuit, signal processing circuit, industrial control computer disposal system, it is characterized in that:
(1) bleeder mechanism is made up of several linear resistance-capacitance type junior units, and its effect is to regulate range automatically according to the inductive voltage value of on-the-spot circuit to carry out suitable step-down, and with the input range of coupling instrument, its input end with the automatic switch-over circuit voltage segment is connected;
(2) current detector is to adopt the magnetic balance type Hall current sensor, and its effect is that the induction current with circuit detects and regulates, and with the input range of coupling instrument, and through follow circuit output, its input end with the automatic switch-over circuit current segment is connected;
(3) automatic switch-over circuit adopts optocoupler automatic output control signal, make relay switch data passage, with step measurement induced voltage and current signal, avoid the asynchronous measuring error of bringing of data, comprise voltage segment and current segment passage, it is connected with the signal processing circuit input port, so that external signal is inputed to signal processing;
(4) signal processing circuit adopts the frequency overlapped-resistable filter circuit, after the voltage and current signal carried out filtering, be input to multifunctional data acquisition card and carry out data sampling, its effect is the higher hamonic wave in the erasure signal, and its input port with the industrial control computer disposal system is connected;
(5) industrial control computer disposal system comprises multifunctional data acquisition card, industrial control computer and LCDs, and its effect is that the sampling of control signal, computational analysis and processing and output are shown.
2. induced electricity line parameter circuit value measuring instrument according to claim 1 is characterized in that: described bleeder mechanism is the resistance-capacitance type voltage divider.
3. induced electricity line parameter circuit value measuring instrument according to claim 1 and 2 is characterized in that: described current detector is the magnetic balance type Hall current sensor, the follow circuit of current detection circuit for being made of operational amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200489845U CN201555879U (en) | 2009-10-30 | 2009-10-30 | Parameter measuring instrument of induction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200489845U CN201555879U (en) | 2009-10-30 | 2009-10-30 | Parameter measuring instrument of induction circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201555879U true CN201555879U (en) | 2010-08-18 |
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| CN2009200489845U Expired - Lifetime CN201555879U (en) | 2009-10-30 | 2009-10-30 | Parameter measuring instrument of induction circuit |
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| CN (1) | CN201555879U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330630A (en) * | 2014-10-31 | 2015-02-04 | 许继电气股份有限公司 | High-accuracy analog quantity phase difference measuring method |
| CN109813990A (en) * | 2019-03-21 | 2019-05-28 | 山西晋电电力科技有限公司电网技术分公司 | Transmission line parameter tests security protection platform |
-
2009
- 2009-10-30 CN CN2009200489845U patent/CN201555879U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330630A (en) * | 2014-10-31 | 2015-02-04 | 许继电气股份有限公司 | High-accuracy analog quantity phase difference measuring method |
| CN109813990A (en) * | 2019-03-21 | 2019-05-28 | 山西晋电电力科技有限公司电网技术分公司 | Transmission line parameter tests security protection platform |
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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: ELECTRIC POWER RESEARCH INSTITUTE, JIANGSU ELECTRI Free format text: FORMER OWNER: JIANGOU PROVINCIAL POWER TEST INST CO., LTD. Effective date: 20121024 Owner name: JIANGSU ELECTRIC POWER CO. STATE ELECTRIC NET CROP Effective date: 20121024 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 210029 NANJING, JIANGSU PROVINCE TO: 210036 NANJING, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121024 Address after: 210036 Fenghuang West Street, Jiangsu, Nanjing, China, No. 243 Patentee after: Electric Power Research Institute of Jiangsu Electric Power Company Patentee after: Jiangsu Electric Power Company Patentee after: State Grid Corporation of China Address before: 210029 No. 243 Fenghuang West Street, Jiangsu, Nanjing Patentee before: Jiangou Provincial Power Test Inst Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100818 |