CN102854484A - Signal sampling accuracy detecting system of combining unit of intelligent substation - Google Patents
Signal sampling accuracy detecting system of combining unit of intelligent substation Download PDFInfo
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Abstract
The invention relates to the field of power detection and provides a signal sampling accuracy detecting system of a combining unit of an intelligent substation. The signal sampling accuracy detecting system of the combining unit of the intelligent substation comprises a reference supply output device, a signal comparing device and a comparison result output device, wherein the reference supply output device is used for outputting a reference supply to the combining unit and the signal comparing device; the signal comparing device is used for comparing signals which are respectively output from the reference supply output device and the combining unit; and the comparison result output device is used for outputting the comparison result of the comparing device. Therefore, by adoption of the signal sampling accuracy detecting system provided by the invention, the signal sampling accuracy of the combining unit of the intelligent substation can be detected.
Description
Technical field
The present invention relates to the electric power detection field, relate in particular to a kind of signal sampling accuracy detection system of merge cells of intelligent substation.
Background technology
At present, intelligent substation is that automatic operating and the management of transformer station brings far-reaching influence and huge change, is the important component part that intelligent grid is built, and all has great significance in economy and technical elements.The widespread use in intelligent substation along with electronic mutual inductor and digital communication technology, merge cells has become the important step in signal sampling in the transformer station, the transmission course, and its function and performance are subject to extensive concern.Then, intelligent substation is as an emerging technical field, and what electric mutual inductor and merge cells adopted also is new technology, owing to be in the initial stage of technical development, the each side such as function and stability are ripe not enough.Therefore, the detection of electric mutual inductor and merge cells properties is that important means is stablized, moved reliably to the assurance intelligent substation.
And in the prior art, not yet provide the detection system to the signal sampling accuracy of the merge cells of intelligent substation.
Summary of the invention
The object of the present invention is to provide a kind of signal sampling accuracy detection system of merge cells of intelligent substation, be intended to detect the signal sampling accuracy of the merge cells of intelligent substation.
The present invention realizes by the following technical solutions:
A kind of signal sampling accuracy detection system of merge cells of intelligent substation is connected with merge cells, and the signal sampling accuracy detection system of the merge cells of described intelligent substation comprises:
The reference source output unit in output reference source, the output terminal of the described reference source output unit of input termination of described merge cells is to sample to the signal of reference source output unit output;
The signal fusing device that the signal that described reference source output unit and merge cells are exported is respectively compared, the first input end of described signal fusing device connects the output terminal of described reference source output unit, the output terminal of the described merge cells of the second input termination;
The comparison result output unit that the result that described comparison device is compared exports, the described compare device's output terminal of the input termination of described comparison result output unit.
The signal sampling accuracy detection system of the merge cells of intelligent substation provided by the invention, be connected with merge cells, the signal sampling accuracy detection system of the merge cells of described intelligent substation comprises: the output reference source is to the reference source output unit of merge cells and signal fusing device, and the output terminal of the described reference source output unit of input termination of described merge cells is to sample to the signal of reference source output unit output; The signal fusing device that the signal that described reference source output unit and merge cells are exported is respectively compared, the first input end of described signal fusing device connects the output terminal of described reference source output unit, the output terminal of the described merge cells of the second input termination; The comparison result output unit that the result that described comparison device is compared exports, the described compare device's output terminal of the input termination of described comparison result output unit.Therefore, the signal sampling accuracy detection system of the merge cells of intelligent substation provided by the invention can detect the signal sampling accuracy of the merge cells of intelligent substation.
Description of drawings
The ultimate principle block diagram of the signal sampling accuracy detection system of the merge cells of the intelligent substation that Fig. 1 provides for the embodiment of the invention;
The concrete theory diagram of the signal sampling accuracy detection system of the merge cells of the intelligent substation that Fig. 2 provides for the embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, the present invention is described in further detail below in conjunction with drawings and the specific embodiments.Should be appreciated that specific embodiment described herein only is used for explaining the present invention, be not limited to the present invention.
With reference to Fig. 1, the theory diagram of the signal sampling accuracy detection system of the merge cells of the intelligent substation that the embodiment of the invention provides.
A kind of signal sampling accuracy detection system of merge cells of intelligent substation, be connected with merge cells 1, the signal sampling accuracy detection system of the merge cells of intelligent substation comprises: the reference source output unit 2 in output reference source, and the output terminal of the input termination reference source output unit 2 of merge cells 1 is to sample to the signal of reference source output unit 2 outputs; The signal fusing device 3 that the signal that reference source output unit 2 and merge cells 1 exports is respectively compared, output terminal, the second input end that the first input end of signal fusing device 3 connects reference source output unit 2 engage the also output terminal of unit 2; The comparison result output unit 4 that the result that comparison device 3 is compared exports, input termination compare device 3 output terminals of comparison result output unit 4.
With reference to Fig. 2, the concrete theory diagram of the signal sampling accuracy detection system of the merge cells of the intelligent substation that the embodiment of the invention provides.
In the embodiment of the invention, reference source output unit 2 adopts AC analogue elementary errors source 21, and signal fusing device 3 adopts dsp processor 31, and comparison result output unit 4 adopts host computer 41.
The output terminal in AC analogue elementary errors source 21 comprises ac current signal output terminal IP, ac voltage signal output terminal UP, exchanges poor stream signal output part IX, exchanges differential pressure signal output terminal UX.
The ac current signal output terminal IP in AC analogue elementary errors source 21 meets the first input end IO1 of dsp processor 31 successively by zero magnetic flux mutual inductor 51, I/V transducer 52, difference channel 53, A/D process chip 54.
The ac voltage signal output terminal UP in AC analogue elementary errors source 21 meets the first input end IO1 of dsp processor 31 successively by voltage divider 61, PGA signal processing circuit 62, difference channel 63, A/D process chip 54.
The poor stream signal output part of interchange IX and the ac current signal output terminal IP in AC analogue elementary errors source 21 engages simultaneously and the current signal sampling end IK of unit 1, exchanges differential pressure signal output terminal UX and engage simultaneously the also voltage signal sampling end UK of unit 1 with ac voltage signal output terminal UP.
The output terminal of merge cells 1 meets the second input end IO2 of dsp processor 31 successively by Optical Receivers 71, ethernet controller 72.
The output terminal COM1 of the input termination dsp processor 31 of host computer 41.
Below the principle of work of signal sampling accuracy detection system of merge cells of intelligent substation that the embodiment of the invention is provided be described further.
High-precision ac current signal and ac voltage signal are exported from ac current signal output terminal IP, ac voltage signal output terminal UP respectively in AC analogue elementary errors source 21.
This high-precision ac current signal becomes little current signal by large current signal after zero passage magnetic flux mutual inductor 51, be converted to voltage signal through I/V transducer 52 by current signal again, process difference channel 53 inhibition external environments such as temperature export afterwards A/D process chip 54 to and carry out analog to digital conversion the impact of signal again.
This high-precision ac voltage signal is through becoming the small voltage signal by large voltage signal after the voltage divider 61, reduce output impedance through PGA signal processing circuit 62 again, process difference channel 63 inhibition external environments such as temperature export afterwards A/D process chip 54 to and carry out analog to digital conversion the impact of signal again.
Carry out analog to digital conversion high-precision ac current signal and ac voltage signal afterwards through A/D process chip 54 and export dsp processor 31 to.
The high-precision ac current signal of the ac current signal output terminal IP output in AC analogue elementary errors source 21 and the poor stream signal stack that exchanges poor stream signal output part IX output, the high-precision ac voltage signal of ac voltage signal output terminal UP output and the differential pressure signal stack that exchanges differential pressure signal output terminal UX output, the signal that ratio is poor or fixed angle is poor of the known fixed of signal formation before the high-precision AC current signal after the stack and ac voltage signal and the stack.High-precision AC current signal and ac voltage signal after this stack export merge cells 1 to, merge cells 1 exports ac voltage signal and the ac current signal that samples to Optical Receivers 71, the signal that Optical Receivers 71 receives is the signal of following the IEC61850 agreement, therefore export ethernet controller 72 to, ethernet controller 72 exports signal to dsp processor 31 afterwards.
Dsp processor with first input end IO1 input by AC analogue elementary errors source 21 respectively from treated high-precision ac current signal and the ac voltage signal of ac current signal output terminal IP, ac voltage signal output terminal UP output,
With the second input end IO2 input by AC analogue elementary errors source 21 comparing from the poor stream signal that exchanges poor stream signal output part IX output, the differential pressure signal that exchanges differential pressure signal output terminal UX output of stack respectively from the basis of the high-precision ac voltage signal of the high-precision ac current signal of ac current signal output terminal IP output, ac voltage signal output terminal UP respectively, and the result that will compare exports host computer 41 to and shows.Check the value of comparison of the signal that ratio is poor or fixed angle is poor of stack known fixed of merge cells 1 output or differential seat angle signal poor with the ratio that do not superpose by host computer 41 whether at preset value, thereby detect the signal sampling accuracy of this merge cells 1.
In sum, the signal sampling accuracy detection system of the merge cells of intelligent substation provided by the invention, comprise: the output reference source is to the reference source output unit 2 of merge cells 1 and signal fusing device 3, the signal fusing device 3 that the signal that described reference source output unit 2 and merge cells 1 are exported is respectively compared, the comparison result output unit 4 that the result that described comparison device 3 is compared exports, therefore, can detect the signal sampling accuracy of the merge cells of intelligent substation.
The above is the preferred embodiment of the present invention only, is not limited to the present invention, all any modifications of doing within principle of the present invention, is equal to and replaces and improvement etc., all should be included within the scope of protection of the invention.
Claims (2)
1. the signal sampling accuracy detection system of the merge cells of an intelligent substation is connected with merge cells (1), it is characterized in that, the signal sampling accuracy detection system of the merge cells of described intelligent substation comprises:
The reference source output unit (2) in output reference source, the output terminal of the described reference source output unit of the input termination of described merge cells (1) (2) is to sample to the signal of reference source output unit (2) output;
The output terminal, second that the signal fusing device (3) that the signal that described reference source output unit (2) and merge cells (1) exports is respectively compared, the first input end of described signal fusing device (3) connect described reference source output unit (2) is inputted the output terminal of the described merge cells of termination (2);
The comparison result output unit (4) that the result that described comparison device (3) is compared exports, the described compare device of input termination (3) output terminal of described comparison result output unit (4).
2. the signals collecting accuracy detection system of the merge cells of intelligent substation as claimed in claim 1, it is characterized in that, described reference source output unit (2) adopts AC analogue elementary errors source (21), described signal fusing device (3) adopts dsp processor (31), and described comparison result output unit (4) adopts host computer (41);
The output terminal in described AC analogue elementary errors source (21) comprises ac current signal output terminal IP, ac voltage signal output terminal UP, exchanges poor stream signal output part IX, exchanges differential pressure signal output terminal UX;
The ac current signal output terminal IP in described AC analogue elementary errors source (21) meets the first input end IO1 of described dsp processor (31) successively by zero magnetic flux mutual inductor (51), I/V transducer (52), difference channel (53), A/D process chip (54)
The ac voltage signal output terminal UP in described AC analogue elementary errors source (21) meets the first input end IO1 of described dsp processor (31) successively by voltage divider (61), PGA signal processing circuit (62), difference channel (63), A/D process chip (54)
The poor stream signal output part of interchange IX and the ac current signal output terminal IP in described AC analogue elementary errors source (21) connect simultaneously described merge cells (1) current signal sampling end IK, exchange the voltage signal sampling end UK that differential pressure signal output terminal UX and ac voltage signal output terminal UP connect described merge cells (1) simultaneously
The output terminal of described merge cells (1) meets the second input end IO2 of described dsp processor (31) successively by Optical Receivers (71), ethernet controller (72),
The output terminal COM1 of the described dsp processor of input termination (31) of described host computer (41).
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Cited By (8)
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| CN103439679A (en) * | 2013-08-28 | 2013-12-11 | 国家电网公司 | Absolute time delay detection device and method of intelligent substation mutual inductor data collection system |
| CN103941211A (en) * | 2014-05-12 | 2014-07-23 | 国家电网公司 | Novel automatic checking method of analogue input merging unit |
| CN103995198A (en) * | 2014-05-22 | 2014-08-20 | 国家电网公司 | Analog input merging unit metering performance detection device and detection method thereof |
| CN104237833A (en) * | 2013-06-07 | 2014-12-24 | 中国能建集团装备有限公司南京技术中心 | Detector used for cross-testing combiner unit compatibility |
| CN105425183A (en) * | 2015-11-13 | 2016-03-23 | 安徽朗格暖通设备有限公司 | Electronic instrument calibration circuit and calibration device |
| CN105911498A (en) * | 2016-06-21 | 2016-08-31 | 南京国电南自电网自动化有限公司 | Merging unit sampling and testing system and application method thereof |
| CN106053899A (en) * | 2016-08-15 | 2016-10-26 | 北京博电新力电气股份有限公司 | Reference signal generation system and method |
| CN108414841A (en) * | 2018-03-09 | 2018-08-17 | 黄建钟 | A kind of pulse per second (PPS) stable measurement device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104237833A (en) * | 2013-06-07 | 2014-12-24 | 中国能建集团装备有限公司南京技术中心 | Detector used for cross-testing combiner unit compatibility |
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| CN103941211A (en) * | 2014-05-12 | 2014-07-23 | 国家电网公司 | Novel automatic checking method of analogue input merging unit |
| CN103995198A (en) * | 2014-05-22 | 2014-08-20 | 国家电网公司 | Analog input merging unit metering performance detection device and detection method thereof |
| CN105425183A (en) * | 2015-11-13 | 2016-03-23 | 安徽朗格暖通设备有限公司 | Electronic instrument calibration circuit and calibration device |
| CN105911498A (en) * | 2016-06-21 | 2016-08-31 | 南京国电南自电网自动化有限公司 | Merging unit sampling and testing system and application method thereof |
| CN105911498B (en) * | 2016-06-21 | 2018-09-21 | 南京国电南自电网自动化有限公司 | A kind of sampling of combining unit and test system and its application process |
| CN106053899A (en) * | 2016-08-15 | 2016-10-26 | 北京博电新力电气股份有限公司 | Reference signal generation system and method |
| CN106053899B (en) * | 2016-08-15 | 2018-10-09 | 北京博电新力电气股份有限公司 | A kind of reference signal generating system and method |
| CN108414841A (en) * | 2018-03-09 | 2018-08-17 | 黄建钟 | A kind of pulse per second (PPS) stable measurement device |
| CN108414841B (en) * | 2018-03-09 | 2023-07-28 | 黄建钟 | Pulse per second stability measuring device |
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| CN102854484B (en) | 2015-04-29 |
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