CN110095743B - Distribution network terminal wave recording performance test module and waveform fitting method thereof - Google Patents

Distribution network terminal wave recording performance test module and waveform fitting method thereof Download PDF

Info

Publication number
CN110095743B
CN110095743B CN201910296785.4A CN201910296785A CN110095743B CN 110095743 B CN110095743 B CN 110095743B CN 201910296785 A CN201910296785 A CN 201910296785A CN 110095743 B CN110095743 B CN 110095743B
Authority
CN
China
Prior art keywords
distribution network
network terminal
waveform
wave recording
standard
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910296785.4A
Other languages
Chinese (zh)
Other versions
CN110095743A (en
Inventor
陈子民
廖鹉嘉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanning Power Supply Bureau of Guangxi Power Grid Co Ltd
Original Assignee
Nanning Power Supply Bureau of Guangxi Power Grid Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanning Power Supply Bureau of Guangxi Power Grid Co Ltd filed Critical Nanning Power Supply Bureau of Guangxi Power Grid Co Ltd
Priority to CN201910296785.4A priority Critical patent/CN110095743B/en
Publication of CN110095743A publication Critical patent/CN110095743A/en
Application granted granted Critical
Publication of CN110095743B publication Critical patent/CN110095743B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/005Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
    • G01R35/007Standards or reference devices, e.g. voltage or resistance standards, "golden references"

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Test And Diagnosis Of Digital Computers (AREA)
  • Tests Of Electronic Circuits (AREA)

Abstract

The invention belongs to the technical field of distribution network terminal detection, and particularly relates to a distribution network terminal wave recording performance test module and a waveform fitting method thereof. The wave recording performance of the distribution terminal is required to be detected in the post-arrival detection outline of the distribution automation terminal in 2017 of the national grid company. The steady-state recording voltage basic error is required: 0.05Un < = 5%,0.1Un < = 2.5%,0.5Un < = 1%,1.0Un < = 5%,1.5Un < = 1%; steady state current relative error is required: 0.1In < = 5%,0.2In < = 2.5%,0.5In < = 1%,1.0In < = 5%,5.0In < = 1,10In < = 2.5%; it is required that the maximum peak instantaneous error in the transient recording should be no more than 10%.

Description

Distribution network terminal wave recording performance test module and waveform fitting method thereof
Technical Field
The invention belongs to the technical field of distribution network terminal detection, and particularly relates to a distribution network terminal wave recording performance test module and a waveform fitting method thereof.
Background
The wave recording performance of the distribution terminal is required to be detected in the post-arrival detection outline of the distribution automation terminal in 2017 of the national grid company. The steady-state recording voltage basic error is required: 0.05Un < = 5%,0.1Un < = 2.5%,0.5Un < = 1%,1.0Un < = 5%,1.5Un < = 1%; steady state current relative error is required: 0.1In < = 5%,0.2In < = 2.5%,0.5In < = 1%,1.0In < = 5%,5.0In < = 1,10In < = 2.5%; it is required that the maximum peak instantaneous error in the transient recording should be no more than 10%.
In the conventional recording performance test, the standard waveform and the measured waveform have inconsistent waveform sampling rates, and the waveform starting points of 2 waveforms are different when the waveforms are compared. If the sampling rates of the 2 waveforms are different, the waveforms with less sampling rates need to be subjected to interpolation by applying a Lagrange interpolation algorithm, so that the waveforms are consistent with the sampling rates of the other waveforms. If the steady-state waveforms are compared, waveform discrete points which are not in the same stage are taken for calculating an effective value of root mean square calculation, so that the calculated effective value has larger deviation; if transient waveforms are compared, 2 waveforms are needed to obtain the maximum peak value at the same stage to calculate the transient error, otherwise, the calculated transient error has no meaning. In order to ensure that the discrete points of the standard waveform and the measured waveform are taken at the same stage, 2 waveforms need to be fitted, and errors are calculated after the fitting, so that the calculated errors can accurately judge the wave recording performance of the distribution network terminal.
Disclosure of Invention
In order to overcome the defects, the invention provides a method for fitting the standard waveform of the standard source and the measurement waveform of the distribution network terminal, and the obtained error can more accurately judge the distribution network wave recording performance. A wave recording performance test module of a distribution network terminal and a waveform fitting method thereof. The specific technical content is as follows:
the distribution network terminal wave recording performance test module comprises a distribution network terminal verification standard source, a distribution network terminal and distribution network terminal verification system software; the distribution network terminal is connected with the standard source through a voltage test wire and a current test wire; the distribution network terminal is connected with the distribution network terminal verification system software; the distribution network terminal verification system software is connected with a distribution network terminal verification standard source, and the distribution network terminal verification system software obtains a distribution network terminal verification standard source standard waveform and a measurement waveform of the distribution terminal.
Further, the distribution network terminal is connected with the distribution network terminal verification system software through an RJ45 network port line.
Further, the distribution network terminal verification system software is connected with a distribution network terminal verification standard source through an RS232 serial port line.
A waveform fitting method for a distribution network terminal wave recording performance test is characterized by comprising the following steps of: the method comprises the following steps:
s1, analyzing a standard waveform and a measured waveform, and taking a standard waveform discrete point A 0 ,A 1 ,A 2 ,...,A N The method comprises the steps of carrying out a first treatment on the surface of the Taking discrete point B of measurement waveform 0 ,B 1 ,B 2 ,...,B N
S2, inserting discrete points by using a Bragg-Rich interpolation algorithm to the discrete points of the extracted measurement waveform, so that the discrete points are consistent with the standard waveform sampling rate, and forming new discrete points M 0 ,M 1 ,M 2 ,...,M N
S3, designating inflection point region discrete points (namely discrete points to be matched) A of standard waveform t ,A t+1 ,...,A t+100
S4, performing fitting calculation by using the matched discrete points to form new discrete points,
C 0 =M 0 *A t +M 1 *A t+1 +...+M 100 *A t+100
C 1 =M 1 *A t +M 2 *A t+1 +...+M 101 *A t+100
....
C 100 =M 100 *A t +M 101 *A t+1 +...+M 200 *A t+100
then M Y Namely sum A t Corresponding point, changing the time of the discrete point of the waveform A to enable the waveform A to be t And M Y The two discrete point moments are consistent, and the A discrete point waveform deduced from the two discrete point moments is fitted with the M discrete point waveform.
After the A discrete point and the M discrete point are fitted, the A discrete point waveform and the B discrete point waveform naturally form fitting
Further, the step S1 is that the source continuous output quantity enables the standard source and the power distribution terminal to generate a wave recording file.
The invention has the beneficial effects that: a waveform fitting algorithm for a distribution network wave recording performance test is provided, wherein a standard waveform of a standard source and a measured waveform of a distribution network terminal are fitted first, then errors of the standard waveform and the measured waveform are calculated, and the obtained errors can be used for accurately judging the transient wave recording performance and the steady wave recording performance of the distribution network terminal.
Drawings
Fig. 1 is a schematic structural diagram of a distribution network terminal wave recording performance test module according to the present invention;
fig. 2 is a waveform effect diagram of a waveform fitting method of a distribution network terminal wave recording performance test according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, a distribution network terminal wave recording performance test module includes a distribution network terminal verification standard source, a distribution network terminal, and distribution network terminal verification system software; the distribution network terminal is connected with the standard source through a voltage test wire and a current test wire; the distribution network terminal is connected with the verification system software of the distribution network terminal through an RJ45 network port line; the distribution network terminal verification system software is connected with a distribution network terminal verification standard source through an RS232 serial port line, and the distribution network terminal verification system software obtains a distribution network terminal verification standard source standard waveform and a measurement waveform of a distribution terminal.
A waveform fitting method for a distribution network terminal wave recording performance test is characterized by comprising the following steps of: the method comprises the following steps:
s1, analyzing a standard waveform and a measured waveform, wherein a source continuous output quantity enables a standard source and a power distribution terminal to generate a wave recording file; taking standard waveform discrete point A 0 ,A 1 ,A 2 ,...,A N The method comprises the steps of carrying out a first treatment on the surface of the Taking discrete point B of measurement waveform 0 ,B 1 ,B 2 ,...,B N
S2, inserting discrete points by using a Bragg-Rich interpolation algorithm to the discrete points of the extracted measurement waveform, so that the discrete points are consistent with the standard waveform sampling rate, and forming new discrete points M 0 ,M 1 ,M 2 ,...,M N
S3, designating inflection point region discrete points of the standard waveform, namely discrete points to be matched, A t ,A t+1 ,...,A t+100
S4, performing fitting calculation by using the matched discrete points to form new discrete points,
C 0 =M 0 *A t +M 1 *A t+1 +...+M 100 *A t+100
C 1 =M 1 *A t +M 2 *A t+1 +...+M 101 *A t+100
....
C 100 =M 100 *A t +M 101 *A t+1 +...+M 200 *A t+100
then M Y Namely sum A t Corresponding point, changing the time of the discrete point of the waveform A to enable the waveform A to be t And M Y The two discrete point moments are consistent, and the A discrete point waveform deduced from the two discrete point moments is fitted with the M discrete point waveform.
As shown in FIG. 2, the A discrete point waveform and the B discrete point waveform are naturally formed after being fitted
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (4)

1. The waveform fitting method of the distribution network terminal wave recording performance test adopts a distribution network terminal wave recording performance test module, wherein the distribution network terminal wave recording performance test module comprises a distribution network terminal verification standard source, a distribution network terminal and distribution network terminal verification system software; the distribution network terminal is connected with the standard source through a voltage test wire and a current test wire; the distribution network terminal is connected with the distribution network terminal verification system software; the distribution network terminal verification system software is connected with a distribution network terminal verification standard source, and the distribution network terminal verification system software obtains a distribution network terminal verification standard source standard waveform and a measurement waveform of a distribution terminal;
the method is characterized in that: the method comprises the following steps:
s1, analyzing a standard waveform and a measured waveform, and taking a standard waveform discrete point A 0 ,A 1 ,A 2 ,...,A N The method comprises the steps of carrying out a first treatment on the surface of the Taking discrete point B of measurement waveform 0 ,B 1 ,B 2 ,...,B N
S2, inserting discrete points of the extracted measurement waveform by using a Bragg-Rich interpolation algorithm to make the discrete points consistent with the standard waveform sampling rate, thereby deducing and forming new discrete points M 0 ,M 1 ,M 2 ,...,M N
S3, designating inflection point region discrete points of the standard waveform, wherein the inflection point region discrete points are discrete points A to be matched t ,A t+1 ,...,A t+100
S4, performing fitting calculation by using the matched discrete points to form new discrete points,
C 0 =M 0 *A t +M 1 *A t+1 +...+M 100 *A t+100
C 1 =M 1 *A t +M 2 *A t+1 +...+M 101 *A t+100
....
C 100 =M 100 *A t +M 101 *A t+1 +...+M 200 *A t+100
ordered discrete point C 0 ,...,C 100 Number Y of maximum value of A t And M Y The two discrete points coincide in time.
2. The waveform fitting method for a distribution network terminal wave recording performance test according to claim 1, wherein the step S1 source continuous output quantity enables both a standard source and a distribution terminal to generate wave recording files.
3. The waveform fitting method for a distribution network terminal wave recording performance test according to claim 2, wherein the distribution network terminal is connected with distribution network terminal verification system software through an RJ45 network port line.
4. A waveform fitting method for a distribution network terminal wave recording performance test as set forth in claim 3, wherein the distribution network terminal verification system software is connected with a distribution network terminal verification standard source through an RS232 serial port line.
CN201910296785.4A 2019-04-14 2019-04-14 Distribution network terminal wave recording performance test module and waveform fitting method thereof Active CN110095743B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910296785.4A CN110095743B (en) 2019-04-14 2019-04-14 Distribution network terminal wave recording performance test module and waveform fitting method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910296785.4A CN110095743B (en) 2019-04-14 2019-04-14 Distribution network terminal wave recording performance test module and waveform fitting method thereof

Publications (2)

Publication Number Publication Date
CN110095743A CN110095743A (en) 2019-08-06
CN110095743B true CN110095743B (en) 2024-03-29

Family

ID=67444795

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910296785.4A Active CN110095743B (en) 2019-04-14 2019-04-14 Distribution network terminal wave recording performance test module and waveform fitting method thereof

Country Status (1)

Country Link
CN (1) CN110095743B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110764036B (en) * 2019-10-29 2022-02-18 南京南瑞继保电气有限公司 Intelligent distribution transformer terminal test method and system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0829255A (en) * 1994-07-12 1996-02-02 Advantest Corp Waveform analyzer
US5493208A (en) * 1992-01-20 1996-02-20 Nec Corporation Waveform displaying method and waveform analyzing apparatus
JP2007240170A (en) * 2006-03-06 2007-09-20 Tohoku Univ Waveform alignment method
CN104360120A (en) * 2014-11-19 2015-02-18 国家电网公司 Real-time waveform display method with low communication bandwidth requirement
CN104901706A (en) * 2015-06-08 2015-09-09 南京灿能电力自动化有限公司 Digital electric energy quality monitoring terminal monitoring device and data converting method thereof
CN108872752A (en) * 2018-07-09 2018-11-23 国网上海市电力公司 A kind of power distribution automation device detection system and its method
CN109001664A (en) * 2018-06-15 2018-12-14 国网湖北省电力有限公司电力科学研究院 A kind of transient state recording type fault detector waveform contrastive test method
CN109617001A (en) * 2018-12-28 2019-04-12 广西电网有限责任公司防城港供电局 A kind of multi-source heterogeneous information intelligent processing system of relay protection

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5493208A (en) * 1992-01-20 1996-02-20 Nec Corporation Waveform displaying method and waveform analyzing apparatus
JPH0829255A (en) * 1994-07-12 1996-02-02 Advantest Corp Waveform analyzer
JP2007240170A (en) * 2006-03-06 2007-09-20 Tohoku Univ Waveform alignment method
CN104360120A (en) * 2014-11-19 2015-02-18 国家电网公司 Real-time waveform display method with low communication bandwidth requirement
CN104901706A (en) * 2015-06-08 2015-09-09 南京灿能电力自动化有限公司 Digital electric energy quality monitoring terminal monitoring device and data converting method thereof
CN109001664A (en) * 2018-06-15 2018-12-14 国网湖北省电力有限公司电力科学研究院 A kind of transient state recording type fault detector waveform contrastive test method
CN108872752A (en) * 2018-07-09 2018-11-23 国网上海市电力公司 A kind of power distribution automation device detection system and its method
CN109617001A (en) * 2018-12-28 2019-04-12 广西电网有限责任公司防城港供电局 A kind of multi-source heterogeneous information intelligent processing system of relay protection

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
电力系统故障录波装置性能评价体系的建立;项灿芳 等;电网技术;第33卷(第4期);94-98 *

Also Published As

Publication number Publication date
CN110095743A (en) 2019-08-06

Similar Documents

Publication Publication Date Title
CN109560540B (en) Line loss load characteristic curve-based theoretical line loss calculation method for power distribution network
CN109524982B (en) AC/DC power grid transient stability risk assessment method
CN106548410B (en) Method for evaluating voltage unbalance probability of power distribution network containing distributed power supply
CN109886604A (en) A kind of transient stability evaluation in power system method based on one-dimensional convolutional neural networks
CN104316894A (en) Simulation and calibration method for practical running environment of electric energy meter
CN109324261A (en) A kind of power distribution network cable run overheat method for prewarning risk and system
CN112731242A (en) Calibration method of on-site calibrator of online power quality monitoring device
CN105510864A (en) Electric energy meter error metering detection method
CN110095743B (en) Distribution network terminal wave recording performance test module and waveform fitting method thereof
CN111311021A (en) Theoretical power prediction method, device, equipment and storage medium for wind power plant
CN109307795A (en) Data point detection method and device
CN103760514B (en) The method and device that a kind of electric energy meter quickly detects
CN116228465A (en) Power distribution network state rapid evaluation and calculation method, system, equipment and storage medium
CN110826498A (en) Transient power quality detection method based on HHT
CN107221933B (en) Probabilistic load flow calculation method
CN108896805A (en) Chopping signal calibration method, system and electric energy detection device
CN105259409A (en) Power signal frequency calculating method based on zero-crossing time-domain characteristic
CN111965479A (en) Line loss abnormity positioning method based on data fine measurement and comparison
CN108614147B (en) Voltage fluctuation detection method and gateway meter thereof
CN112910006B (en) Universal electromagnetic transient modeling method for direct-drive wind turbine generator
CN115656625A (en) Dynamic signal measuring method and system based on dynamic self-adaptive step wave
CN116231620A (en) Quantitative evaluation method for primary frequency modulation capability of large power grid
CN112557813B (en) Method for judging voltage stability of power grid under simultaneous fault of multiple loops of direct current
CN109407543B (en) Verification method and device for voltage response characteristics of electrical model of wind turbine generator
CN113985266A (en) Centralized load identification method for multiple intelligent electric meters

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant