CN103926502A - AC/DC electric channeling detection device of DC power source - Google Patents
AC/DC electric channeling detection device of DC power source Download PDFInfo
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- CN103926502A CN103926502A CN201410167101.8A CN201410167101A CN103926502A CN 103926502 A CN103926502 A CN 103926502A CN 201410167101 A CN201410167101 A CN 201410167101A CN 103926502 A CN103926502 A CN 103926502A
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Abstract
The invention provides an AC/DC electric channeling detection device of a DC power source. The AC/DC electric channeling detection device comprises a blocking filter, a voltage divider, a true RMS converter, an A/D sampler, an FPGA and an audible and visual alarm. After the blocking filter is used for filtering a DC bus, AC signals are output to the voltage divider, the AC signals are output to the true RMS converter after undergoing voltage dividing of the voltage divider, the AC signals are output to the A/D sampler after being converted by the true RMS converter, the AC signals are output to the FPGA after being sampled by the A/D sampler, and the audible and visual alarm is then connected with the FPGA. The AC/DC electric channeling detection device of the DC power source can quickly detect whether AC/DC electric channeling happens to a DC power source circuit or not.
Description
Technical field
The present invention relates to a kind of alternating current-direct current and alter electric detection means, especially a kind of alternating current-direct current for direct supply is altered electric detection means.
Background technology
DC system earth fault in electric system is a kind of easy generation and the fault larger to electric system harmfulness.No matter be plus earth or minus earth, the in the situation that of 2 ground connection, all may cause protection malfunction or protection tripping, harm primary system normally moves.Existing direct current monitoring device adopts patrol mode more, completing one-time detection needs the time long, efficiency is lower, and existing direct current on-Line Monitor Device only monitors insulation, and the interchange in straight-flow system is altered to electric fault and direct current, alters mutually fault and cannot monitor.
Summary of the invention
The object of the present invention is to provide a kind of can fast to whether there being alternating current-direct current to alter the pick-up unit that electricity detects in DC power supply circuit.
To achieve these goals, the alternating current-direct current that the invention provides a kind of direct supply is altered electric detection means, comprise every straight wave filter, voltage divider, real effective converter, A/D sampling thief, FPGA and audible-visual annunciator, every the input end of straight wave filter and the DC bus of direct supply, be connected, every the output terminal of straight wave filter and the input end of voltage divider, be connected, the output terminal of voltage divider is connected with the input end of real effective converter, the output terminal of real effective converter is connected with the input end of A/D sampling thief, the output terminal of A/D sampling thief is connected with the signal input part of FPGA, the signal output part of FPGA is connected with the input end of audible-visual annunciator.
Employing is after straight wave filter is to DC bus filtering, export AC signal to voltage divider, again by exporting real effective converter after voltage divider dividing potential drop to, after the conversion of real effective converter, export again A/D sampling thief to, after the sampling of A/D sampling thief, export again FPGA to, thereby by FPGA, according to sampled result, judge whether to have scurried into AC compounent, if there is AC compounent, to audible-visual annunciator, send alarm signal.
Scheme as a further improvement on the present invention, also comprise constant current signal source, voltage data collector and MCU, the output terminal in constant current signal source is connected with the DC bus of direct supply, two input ends of voltage data collector are connected with two differences on the DC bus of direct supply respectively, the signal input part of MCU is connected with the output terminal of voltage data collector, the control end of MCU is connected with the input end in constant current signal source, and the signal output part of MCU is connected with the input end of audible-visual annunciator.Adopt constant current signal source to inject DC source to DC bus, by voltage data collector, two differences on DC bus are gathered again, finally by MCU, according to collection signal, judge whether to exist direct current to alter mutually, if there is direct current, alter mutually, to audible-visual annunciator, send alarm signal.
Scheme, also comprises a display screen as a further improvement on the present invention, and the signal input part of display screen is connected with the signal output part of FPGA and the signal output part of MCU respectively.Adopt display to show testing result, facilitate testing staff to carry out field notes to testing result.
Beneficial effect of the present invention is: (1) can fast and effeciently separate AC compounent from DC bus, and AC compounent is gathered, and judge whether to have scurried into AC compounent by FPGA, if there is AC compounent, by audible-visual annunciator, given the alarm; (2) by voltage data collector, two differences on DC bus are gathered, then judge whether to exist direct current to alter mutually by MCU, if there is direct current, alter mutually, by audible-visual annunciator, given the alarm; (3) adopt display to show testing result, facilitate testing staff to carry out field notes to testing result.
Accompanying drawing explanation
Fig. 1 is AC detection circuit schematic diagram of the present invention;
Fig. 2 is alternating current-direct current testing circuit schematic diagram of the present invention;
Fig. 3 is the circuit diagram with Presentation Function of the present invention.
Embodiment
As shown in Figure 1, the alternating current-direct current of direct supply of the present invention is altered electric detection means, comprise every straight wave filter, voltage divider, real effective converter, A/D sampling thief, FPGA and audible-visual annunciator, every the input end of straight wave filter and the DC bus of direct supply, be connected, every the output terminal of straight wave filter and the input end of voltage divider, be connected, the output terminal of voltage divider is connected with the input end of real effective converter, real effective converter can convert AC signal to direct current signal accurately, the output terminal of real effective converter is connected with the input end of A/D sampling thief, A/D sampling thief can complete the sampling of 10000 times per second, the output terminal of A/D sampling thief is connected with the signal input part of FPGA, the signal output part of FPGA is connected with the input end of audible-visual annunciator.
This pick-up unit is when work, first by every straight wave filter, the signal on DC bus being carried out to filtering, filtering DC component, only retain AC compounent wherein, and then export AC signal to voltage divider, again by exporting real effective converter after voltage divider dividing potential drop to, real effective conversion converts AC signal to direct current signal, after the conversion of real effective converter, export again A/D sampling thief to, after the sampling of A/D sampling thief, export again FPGA to, finally by FPGA, according to collection result, judge in direct current, whether to have scurried into AC compounent, if there is AC compounent, by audible-visual annunciator, given the alarm.
As shown in Figure 2, in order further to judge the phenomenon that whether exists direct current signal to alter mutually in DC bus, the present invention also comprises constant current signal source, voltage data collector and MCU, the output terminal in constant current signal source is connected with the DC bus of direct supply, two input ends of voltage data collector are connected with two differences on the DC bus of direct supply respectively, the signal input part of MCU is connected with the output terminal of voltage data collector, the control end of MCU is connected with the input end in constant current signal source, and the signal output part of MCU is connected with the input end of audible-visual annunciator.
This pick-up unit is when work, also utilize constant current signal source to inject DC source to DC bus, by voltage data collector, two differences on DC bus are gathered again, finally by MCU, to the collection signal receiving, judge whether to exist direct current to alter mutually, if there is direct current, alter mutually, by audible-visual annunciator, given the alarm.
As shown in Figure 3, in order to further facilitate testing staff, carry out field notes, the present invention has also designed and has also comprised a display screen, and the signal input part of display screen is connected with the signal output part of FPGA and the signal output part of MCU respectively.Adopt display to show in real time testing result, facilitate testing staff to carry out field notes to testing result.
Claims (3)
1. the alternating current-direct current of a direct supply is altered electric detection means, it is characterized in that: comprise every straight wave filter, voltage divider, real effective converter, A/D sampling thief, FPGA and audible-visual annunciator, describedly every the input end of straight wave filter and the DC bus of direct supply, be connected, describedly every the output terminal of straight wave filter and the input end of voltage divider, be connected, the output terminal of described voltage divider is connected with the input end of real effective converter, the output terminal of described real effective converter is connected with the input end of A/D sampling thief, the output terminal of described A/D sampling thief is connected with the signal input part of FPGA, the signal output part of described FPGA is connected with the input end of audible-visual annunciator.
2. the alternating current-direct current of direct supply according to claim 1 is altered electric detection means, it is characterized in that: also comprise constant current signal source, voltage data collector and MCU, the output terminal in described constant current signal source is connected with the DC bus of direct supply, two input ends of described voltage data collector are connected with two differences on the DC bus of direct supply respectively, the signal input part of described MCU is connected with the output terminal of voltage data collector, the control end of described MCU is connected with the input end in constant current signal source, the signal output part of described MCU is connected with the input end of audible-visual annunciator.
3. the alternating current-direct current of direct supply according to claim 1 and 2 is altered electric detection means, it is characterized in that: also comprise a display screen, the signal input part of described display screen is connected with the signal output part of FPGA and the signal output part of MCU respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410167101.8A CN103926502B (en) | 2014-04-23 | 2014-04-23 | A kind of alternating current-direct current of dc source alters electric detection means |
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| CN201410167101.8A CN103926502B (en) | 2014-04-23 | 2014-04-23 | A kind of alternating current-direct current of dc source alters electric detection means |
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| CN103926502A true CN103926502A (en) | 2014-07-16 |
| CN103926502B CN103926502B (en) | 2017-06-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391256A (en) * | 2014-12-03 | 2015-03-04 | 浙江科畅电子有限公司 | Direct-current power supply looped network fault diagnosis device |
| CN105988088A (en) * | 2015-01-30 | 2016-10-05 | 深圳奥特迅电力设备股份有限公司 | Method and system for detecting DC bus branch crossing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08320352A (en) * | 1995-03-20 | 1996-12-03 | Matsushita Electric Ind Co Ltd | Earth leakage detection device |
| CN202421312U (en) * | 2011-12-20 | 2012-09-05 | 首瑞（北京）投资管理集团有限公司 | Device for monitoring alternating current being in series connection with direct current system |
| CN103135038A (en) * | 2013-02-01 | 2013-06-05 | 广州优维电子科技有限公司 | Alternative current electric crosstalk and insulation fault monitoring line selection method of direct current system |
| CN203350333U (en) * | 2013-06-18 | 2013-12-18 | 国家电网公司 | DC (direct current) system alternating current fault detection apparatus |
| CN103698651A (en) * | 2013-12-27 | 2014-04-02 | 国家电网公司 | Method and device for monitoring crossing of direct current insulated buses |
| CN203909197U (en) * | 2014-04-23 | 2014-10-29 | 国家电网公司 | AC/DC channeling detecting device for DC power supply |
-
2014
- 2014-04-23 CN CN201410167101.8A patent/CN103926502B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08320352A (en) * | 1995-03-20 | 1996-12-03 | Matsushita Electric Ind Co Ltd | Earth leakage detection device |
| CN202421312U (en) * | 2011-12-20 | 2012-09-05 | 首瑞（北京）投资管理集团有限公司 | Device for monitoring alternating current being in series connection with direct current system |
| CN103135038A (en) * | 2013-02-01 | 2013-06-05 | 广州优维电子科技有限公司 | Alternative current electric crosstalk and insulation fault monitoring line selection method of direct current system |
| CN203350333U (en) * | 2013-06-18 | 2013-12-18 | 国家电网公司 | DC (direct current) system alternating current fault detection apparatus |
| CN103698651A (en) * | 2013-12-27 | 2014-04-02 | 国家电网公司 | Method and device for monitoring crossing of direct current insulated buses |
| CN203909197U (en) * | 2014-04-23 | 2014-10-29 | 国家电网公司 | AC/DC channeling detecting device for DC power supply |
Non-Patent Citations (2)
| Title |
|---|
| 李修金等: "变电站直流系统两段母线串电分析", 《江苏电机工程》, vol. 30, no. 3, 31 May 2011 (2011-05-31) * |
| 赵应春等: "直流系统交流窜电故障监测技术的研究", 《电工技术》, no. 11, 10 November 2013 (2013-11-10) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391256A (en) * | 2014-12-03 | 2015-03-04 | 浙江科畅电子有限公司 | Direct-current power supply looped network fault diagnosis device |
| CN105988088A (en) * | 2015-01-30 | 2016-10-05 | 深圳奥特迅电力设备股份有限公司 | Method and system for detecting DC bus branch crossing |
| CN105988088B (en) * | 2015-01-30 | 2018-12-04 | 深圳奥特迅电力设备股份有限公司 | A kind of method and system that detection DC bus branch is mutually altered |
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| CN103926502B (en) | 2017-06-23 |
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