CN106154025B - A kind of method that combining unit rejects single-point abnormal data - Google Patents
A kind of method that combining unit rejects single-point abnormal data Download PDFInfo
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- CN106154025B CN106154025B CN201610439050.9A CN201610439050A CN106154025B CN 106154025 B CN106154025 B CN 106154025B CN 201610439050 A CN201610439050 A CN 201610439050A CN 106154025 B CN106154025 B CN 106154025B
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- 230000002159 abnormal effect Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000004364 calculation method Methods 0.000 claims description 10
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004422 calculation algorithm Methods 0.000 abstract description 2
- 208000032368 Device malfunction Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 231100000681 Certain safety factor Toxicity 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Abstract
A kind of method that combining unit rejects single-point abnormal data.It includes the actual sample value for obtaining a certain sampled point that combining unit is ready for sending；Calculate ideal value corresponding to actual sample value；Judge the catastrophe characteristics for the actual sample value that combining unit is ready for sending；Actual sample value is substituted with calculated ideal value and is sent；The actual sample value of transmission current sampling point and etc..The beneficial effect that combining unit provided by the invention rejects the method for single-point abnormal data is: passing through the crude sampling point data before and after comparison sampled point; single-point abnormal data can effectively be rejected; and sensitivity can be controlled according to the size of threshold value; load fluctuation amount can effectively be avoided; the method is suitable for the single-point abnormity removing data of electric current and voltage; it can be in the performance of source raising combining unit; simplify the protection of rear end and the Processing Algorithm of measure and control device; system operation level can be effectively improved, the reliability of device is improved.
Description
Technical field
The invention belongs to technical field of power systems, and the side of single-point abnormal data is rejected more particularly to a kind of combining unit
Method.
Background technique
In recent years, intelligent substation came into all-round construction period, however the combining unit of intelligent substation is responsible for handle
The voltage and current of simulation is converted into the voltage and current amount of number, and subsequent all protection and measure and control device will be from merging
Unit obtains data；If combining unit sends single-point abnormal data due to electromagnetic interference etc., it is likely that protection is caused to fill
The malfunction set.The thing of protective device malfunction caused by a lot of abnormal sample data sent as combining unit was once occurred for scene
Therefore.General processing method is all to do the rejecting of single-point abnormal data in reception sampled value side, will result in each producer in this way
Way it is inconsistent, sensitivity also can be inconsistent, so as to cause with some problems for closing.
So needing to propose a kind of elimination method of single-point abnormal data carried out from source i.e. combining unit side.
China Patent Publication No. CN103872667A discloses a kind of abnormal line current several greatly of entitled anti-combining unit
Differential protecting method, this method are compared by the amount of line differential protection alternative route device two sides, judge whether it is different
Often big number can effectively prevent combining unit abnormal the case where number leads to differential protection malfunction greatly.But it is by opposite side
Data as reference, it is only effective to differential protection, not can solve the protective device malfunction problem of not opposite side.
Summary of the invention
To solve the above-mentioned problems, the purpose of the present invention is to provide the sides that a kind of combining unit rejects single-point abnormal data
Method.
In order to achieve the above object, the method that combining unit provided by the invention rejects single-point abnormal data includes in order
The following steps of execution:
Step 1) obtains the actual sample value for a certain sampled point that combining unit is ready for sending；
Step 2) calculates ideal value corresponding to above-mentioned actual sample value, and the calculation method of ideal value is to utilize
The actual sample value progress interpolation calculation of two sampled points obtains before and after the sampled point；
Step 3) judges the catastrophe characteristics for the actual sample value that combining unit is ready for sending, and method is by actual sample value
Subtract each other with ideal value, if the two difference is greater than threshold value, judges the actual sample value for the list with macromutation characteristic
4) point abnormal data, enters step, otherwise enters step 5)；
The calculated ideal value of step 4) substitutes actual sample value and sends；
The actual sample value of step 5) transmission current sampling point.
In step 1), the actual sample value is voltage or current value.
In step 3), the interpolation computing method is linear interpolation method or Lagrange's interpolation.
In step 3), the value principle of the threshold value are as follows: generally take 0.1-3 times of voltage rating or current value.
The beneficial effect that combining unit provided by the invention rejects the method for single-point abnormal data is: by comparing sampled point
The crude sampling point data of front and back can effectively reject single-point abnormal data, and sensitivity can be according to the size control of threshold value
System can effectively avoid load fluctuation amount, and the method is suitable for the single-point abnormity removing data of electric current and voltage, can be in source
The performance of combining unit is improved, the protection of rear end and the Processing Algorithm of measure and control device are simplified, system operation can be effectively improved
Level improves the reliability of device.
Detailed description of the invention
Fig. 1 is the method flow diagram that combining unit provided by the invention rejects single-point abnormal data.
Fig. 2 is the effect diagram that combining unit rejects single-point abnormal data.
Specific embodiment
The method that single-point abnormal data is rejected to combining unit provided by the invention in the following with reference to the drawings and specific embodiments
It is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, right below according to accompanying drawings and embodiments
The present invention is further elaborated.It should be appreciated that specific implementation described herein is only used to explain the present invention, not
Limit the present invention.
As shown in Figure 1, the method that combining unit of the invention rejects single-point abnormal data include execute in order it is following
Step:
Step 1) obtains the actual sample value for a certain sampled point that combining unit is ready for sending；
Step 2) calculates ideal value corresponding to above-mentioned actual sample value, and the calculation method of ideal value is to utilize
The actual sample value progress interpolation calculation of two sampled points obtains before and after the sampled point；
Step 3) judges the catastrophe characteristics for the actual sample value that combining unit is ready for sending, and method is by actual sample value
Subtract each other with ideal value, if the two difference is greater than threshold value, judges the actual sample value for the list with macromutation characteristic
4) point abnormal data, enters step, otherwise enters step 5)；As shown in Fig. 2, wherein A point is the single-point with macromutation characteristic
Abnormal data, B point are the ideal value obtained by interpolation calculation, and C is the difference of A point and B point；
The calculated ideal value of step 4) substitutes actual sample value and sends；
The actual sample value of step 5) transmission current sampling point.
In step 1), the actual sample value is voltage or current value.
In step 3), the interpolation computing method is linear interpolation method or Lagrange's interpolation.
In step 3), the value principle of the threshold value are as follows: the maximum harmonic content being likely to occur according to system is in wave
Embodiment in shape determines, and multiplied by certain safety factor, generally takes 0.1-3 times of voltage rating or current value.
Combining unit provided by the invention does not reject the method for single-point abnormal data in view of the defects existing in the prior art and not
Foot can carry out the rejecting of single-point abnormal data from source, therefore the reliability of whole system can be improved.
Claims (4)
1. a kind of method that combining unit rejects single-point abnormal data, it is characterised in that: it is different that the combining unit rejects single-point
The method of regular data includes the following steps executed in order:
Step 1) obtains the actual sample value for a certain sampled point that combining unit is ready for sending；
Step 2) calculates ideal value corresponding to above-mentioned actual sample value, and the calculation method of ideal value is adopted using this
The actual sample value progress interpolation calculation of two sampled points obtains before and after sampling point；
Step 3) judges the catastrophe characteristics for the actual sample value that combining unit is ready for sending, and method is by actual sample value and reason
Think that sampled value is subtracted each other, if the two difference is greater than threshold value, judges that the actual sample value is different for the single-point with macromutation characteristic
4) regular data, enters step, otherwise enter step 5)；
The calculated ideal value of step 4) substitutes actual sample value and sends；
The actual sample value of step 5) transmission current sampling point.
2. the method that combining unit according to claim 1 rejects single-point abnormal data, it is characterised in that: in step 1)
In, the actual sample value is voltage or current value.
3. the method that combining unit according to claim 1 rejects single-point abnormal data, it is characterised in that: in step 3)
In, the interpolation computing method is linear interpolation method or Lagrange's interpolation.
4. the method that combining unit according to claim 1 rejects single-point abnormal data, it is characterised in that: in step 3)
In, the value principle of the threshold value are as follows: take 0.1-3 times of voltage rating or current value.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106786336B (en) * | 2016-12-26 | 2019-05-31 | 国电南瑞科技股份有限公司 | The sampling of intelligent substation protective device single-point is abnormal to count greatly anti-error processing method |
| CN109375007B (en) * | 2018-09-30 | 2021-01-26 | 南方电网科学研究院有限责任公司 | Failure evaluation method, device, equipment and storage medium of measurement and control protection device |
| CN110243291A (en) * | 2019-01-10 | 2019-09-17 | 武汉滨湖电子有限责任公司 | A kind of laser pavement construction depth detection system anti-interference method |
| CN111654695A (en) * | 2020-07-30 | 2020-09-11 | 重庆盛泰光电有限公司 | Camera module detection data management system |
| CN115657925B (en) * | 2022-12-28 | 2023-03-14 | 上海海栎创科技股份有限公司 | Touch input recognition system, method, device and computer-readable storage medium |
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| CN101350518A (en) * | 2008-09-05 | 2009-01-21 | 国电南瑞科技股份有限公司 | Method for processing sampling value of digitalization protection test control apparatus |
| CN101707396A (en) * | 2009-06-08 | 2010-05-12 | 国电南瑞科技股份有限公司 | Lost sample data processing method based on mathematic models of current and voltage |
| CN102684151A (en) * | 2012-04-28 | 2012-09-19 | 辽宁省电力有限公司朝阳供电公司 | Dual-redundancy A/D (analog/digital) sampling signal effectiveness judgment method and relay protection method |
| CN102707132A (en) * | 2012-05-21 | 2012-10-03 | 国电南瑞科技股份有限公司 | Dynamic processing method of abnormal sampling value of digitalized protection and monitoring device |
| CN103872667A (en) * | 2014-03-26 | 2014-06-18 | 国家电网公司 | Circuit current differential protection method preventing abnormal large number of combination unit |
| US20150171621A1 (en) * | 2012-06-26 | 2015-06-18 | Mitsubishi Electric Corporation | Current differential relay |
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2016
- 2016-06-15 CN CN201610439050.9A patent/CN106154025B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101350518A (en) * | 2008-09-05 | 2009-01-21 | 国电南瑞科技股份有限公司 | Method for processing sampling value of digitalization protection test control apparatus |
| CN101707396A (en) * | 2009-06-08 | 2010-05-12 | 国电南瑞科技股份有限公司 | Lost sample data processing method based on mathematic models of current and voltage |
| CN102684151A (en) * | 2012-04-28 | 2012-09-19 | 辽宁省电力有限公司朝阳供电公司 | Dual-redundancy A/D (analog/digital) sampling signal effectiveness judgment method and relay protection method |
| CN102707132A (en) * | 2012-05-21 | 2012-10-03 | 国电南瑞科技股份有限公司 | Dynamic processing method of abnormal sampling value of digitalized protection and monitoring device |
| US20150171621A1 (en) * | 2012-06-26 | 2015-06-18 | Mitsubishi Electric Corporation | Current differential relay |
| CN103872667A (en) * | 2014-03-26 | 2014-06-18 | 国家电网公司 | Circuit current differential protection method preventing abnormal large number of combination unit |
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