CN104267366A - Automatic relay protection testing device output alternating voltage response speed measuring method - Google Patents
Automatic relay protection testing device output alternating voltage response speed measuring method Download PDFInfo
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- CN104267366A CN104267366A CN201410535041.0A CN201410535041A CN104267366A CN 104267366 A CN104267366 A CN 104267366A CN 201410535041 A CN201410535041 A CN 201410535041A CN 104267366 A CN104267366 A CN 104267366A
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Abstract
The invention relates to an automatic relay protection testing device output alternating voltage response speed measuring method. The method includes the steps of collecting data, storing and dividing data, setting four 16-bit data storage arrays (A, B, C and D), finding the maximum value in the array C to obtain the alternating output voltage U, finding the 10% U value, the 90% U value and the maximum value U1 in the combination of the array A and the array B so as to obtain the rise time and the overshoot triggering coefficient, and finding the 90% U value, the 10% U value and the minimum value U2 in the array D so as to obtain the fall time and the overshoot stopping coefficient. By means of the method, the relay protection testing device output alternating voltage response speed can be automatically measured, the measuring accuracy of the rise time and the fall time reaches 0.1 microsecond, the measuring accuracy of the ratio of the overshoot value to the set value reaches the 0.05 level, the measuring accuracy is high, the method is convenient and rapid to implement, and the data can be directly read.
Description
Technical field
The invention belongs to instrument and meter field of measuring technique, especially a kind of relay-protection tester output AC voltage response speed method for automatic measurement.
Background technology
Specify the response speed of output AC voltage according to People's Republic of China (PRC) power industry standard DL/T624-2010 " relay protection microcomputer type test unit technical conditions " 4.3.3.10, output voltage is U
maxtime, resistive load records voltage magnitude when rising to 90% (or dropping to 10% by 90%) by 10%, its rise or fall time should be less than 100 μ s, the maximum overshoot value exporting response be not more than setting output valve ± 10%, defectively will be defined as critical defect.Do not have specialized equipment to realize automatically measuring at present, the method for inspection of employing be with measuring voltage amplitude artificial after digital storage oscilloscope wave recording figure by 10% to 90% time, it is low that the method measures efficiency, and precision is affected by human factors greatly.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of relay-protection tester output AC voltage response speed method for automatic measurement is provided.
The present invention solves its technical matters and takes following technical scheme to realize:
A kind of relay-protection tester output AC voltage response speed method for automatic measurement, comprises step as follows:
(1) relay-protection tester output AC voltage data acquisition
1. data acquisition, is connected the input end of 16 high-speed a/d conversion devices with relay-protection tester output terminal, gathers the output voltage signal of relay-protection tester, sampling rate 10M/s;
2. store Data Placement, set 4 16 bit data storages array A, B, C, D, A and be used for depositing the front 1ms time-sampling data of triggering, count 10000 numbers; B is used for depositing the rear 10ms time-sampling data of triggering, counts 100000 numbers; C is for depositing the sampled data in 1 the cycle 20ms time of 50Hz AC signal, and for saving storage space and improving computing velocity, C section is often sampled 200 and deposited a value, counts 1000 numbers; D is used for depositing negative edge 2ms time-sampling data, counts 20000 numbers, continuous 5000 o'clock of D section sampled data close to zero time show that negative edge terminates, terminate sampling;
(2) output AC voltage response speed is calculated
1. maximizing in array C, obtains ac output voltage U;
2. combine the corresponding point sequence number m1 finding 10%U value at array A, B, find the corresponding point sequence number n1 of 90%U value, maximizing U1, obtain rise time t
r=(n1-m1) * 0.1 μ s, obtains triggering overshoot factor, the ratio of overshoot value and U: σ=(U1-U)/U;
3. in array D, find the corresponding point sequence number m2 of 90%U value, find the corresponding point sequence number n2 of 10%U value, find minimum value U2, obtain t fall time
f=(n2-m2) * 0.1 μ s, obtains ending overshoot factor, the ratio of overshoot value and U: σ=(0-U2)/U.
And in step (1), described C section 2. is often sampled 200 and is deposited a value and be: the value storing the intermediate samples point of 200 sampled points.
And, in step (1) described continuous 5000 sampled points 2. data close to zero time specifically refer to that the data value of 5000 sampled points is all less than 0.1% of peak-peak.
Advantage of the present invention and good effect are:
The inventive method can realize the automatic measurement of relay-protection tester output AC voltage response speed.Rise, fall time measuring accuracy reach 0.1 μ s, overshoot value reaches 0.05 grade with the ratio measuring accuracy of setting value, and measuring accuracy is high, convenient and swift, directly reads data.
Accompanying drawing explanation
Fig. 1 is the waveform schematic diagram that the present invention measures value.
Embodiment
Be further described the invention process below in conjunction with accompanying drawing, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A kind of relay-protection tester output AC voltage response speed method for automatic measurement, comprises step as follows:
(1) relay-protection tester output AC voltage data acquisition
1. data acquisition, is connected the input end of 16 high-speed a/d conversion devices with relay-protection tester output terminal, gathers the output voltage signal of relay-protection tester, sampling rate 10M/s;
2. store Data Placement, set 4 16 bit data storages array A, B, C, D, A and be used for depositing the front 1ms time-sampling data of triggering, count 10000 numbers; B is used for depositing the rear 10ms time-sampling data of triggering, counts 100000 numbers; C is for depositing the sampled data in 1 the cycle 20ms time of 50Hz AC signal, and for saving storage space and improving computing velocity, C section is often sampled 200 and deposited a value, counts 1000 numbers; D is used for depositing negative edge 2ms time-sampling data, counts 20000 numbers, continuous 5000 o'clock of D section sampled data close to zero time show that negative edge terminates, terminate sampling;
Wherein, described C section is often sampled 200 and is deposited a value and be: the value storing the intermediate samples point of 200 sampled points.
Wherein, described continuous 5000 sampled points data close to zero time specifically refer to that the data value of 5000 sampled points is all less than 0.1% of peak-peak.
(2) output AC voltage response speed is calculated
1. maximizing in array C, obtains ac output voltage U;
2. combine the corresponding point sequence number m1 finding 10%U value at array A, B, find the corresponding point sequence number n1 of 90%U value, maximizing U1, obtain rise time t
r=(n1-m1) * 0.1 μ s, obtains triggering overshoot factor, the ratio of overshoot value and U: σ=(U1-U)/U;
3. in array D, find the corresponding point sequence number m2 of 90%U value, find the corresponding point sequence number n2 of 10%U value, find minimum value U2, obtain t fall time
f=(n2-m2) * 0.1 μ s, obtains ending overshoot factor, the ratio of overshoot value and U: σ=(0-U2)/U.
Claims (3)
1. a relay-protection tester output AC voltage response speed method for automatic measurement, is characterized in that comprising step as follows:
(1) relay-protection tester output AC voltage data acquisition
1. data acquisition, is connected the input end of 16 high-speed a/d conversion devices with relay-protection tester output terminal, gathers the output voltage signal of relay-protection tester, sampling rate 10M/s;
2. store Data Placement, set 4 16 bit data storages array A, B, C, D, A and be used for depositing the front 1ms time-sampling data of triggering, count 10000 numbers; B is used for depositing the rear 10ms time-sampling data of triggering, counts 100000 numbers; C is for depositing the sampled data in 1 the cycle 20ms time of 50Hz AC signal, and for saving storage space and improving computing velocity, C section is often sampled 200 and deposited a value, counts 1000 numbers; D is used for depositing negative edge 2ms time-sampling data, counts 20000 numbers, continuous 5000 o'clock of D section sampled data close to zero time show that negative edge terminates, terminate sampling;
(2) output AC voltage response speed is calculated
1. maximizing in array C, obtains ac output voltage U;
2. combine the corresponding point sequence number m1 finding 10%U value at array A, B, find the corresponding point sequence number n1 of 90%U value, maximizing U1, obtain rise time tr=(n1-m1) * 0.1 μ s, obtain triggering overshoot factor, the ratio of overshoot value and U: σ=(U1-U)/U;
3. in array D, find the corresponding point sequence number m2 of 90%U value, find the corresponding point sequence number n2 of 10%U value, find minimum value U2, obtain tf=fall time (n2-m2) * 0.1 μ s, obtain ending overshoot factor, the ratio of overshoot value and U: σ=(0-U2)/U.
2. relay-protection tester output AC voltage response speed method for automatic measurement according to claim 1, is characterized in that: in step (1), described C section 2. is often sampled 200 and deposited a value and be: the value storing the intermediate samples point of 200 sampled points.
3. relay-protection tester output AC voltage response speed method for automatic measurement according to claim 1, is characterized in that: in step (1) described continuous 5000 sampled points 2. data close to zero time specifically refer to that the data value of 5000 sampled points is all less than 0.1% of peak-peak.
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Citations (5)
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| JPS5961789A (en) * | 1982-10-01 | 1984-04-09 | Sony Tektronix Corp | Method for judging probe calibration |
| US7027945B2 (en) * | 2003-12-22 | 2006-04-11 | Agilent Technologies, Inc. | Method of self-calibration of pulse rise and fall times |
| CN201589855U (en) * | 2009-12-15 | 2010-09-22 | 江西省电力科学研究院 | Detection device of relay protection testing device |
| CN202649449U (en) * | 2012-07-24 | 2013-01-02 | 国家电网公司 | Inspection device and inspection system for relay protection device checking instrument |
| CN103823198A (en) * | 2014-02-28 | 2014-05-28 | 国家电网公司 | Relay protection testing device time measurement accuracy degree detection system and method |
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2014
- 2014-10-13 CN CN201410535041.0A patent/CN104267366B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5961789A (en) * | 1982-10-01 | 1984-04-09 | Sony Tektronix Corp | Method for judging probe calibration |
| US7027945B2 (en) * | 2003-12-22 | 2006-04-11 | Agilent Technologies, Inc. | Method of self-calibration of pulse rise and fall times |
| CN201589855U (en) * | 2009-12-15 | 2010-09-22 | 江西省电力科学研究院 | Detection device of relay protection testing device |
| CN202649449U (en) * | 2012-07-24 | 2013-01-02 | 国家电网公司 | Inspection device and inspection system for relay protection device checking instrument |
| CN103823198A (en) * | 2014-02-28 | 2014-05-28 | 国家电网公司 | Relay protection testing device time measurement accuracy degree detection system and method |
Non-Patent Citations (1)
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| 管晓虎 等: "一种微机继电保护教学实验平台的硬件设计研究", 《测控技术》 * |
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Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Applicant after: State Grid Corporation of China Applicant after: State Grid Tianjin Electric Power Company Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: State Grid Tianjin Electric Power Company |
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