CN103248005B - A kind of analyses for double circuits on same tower AC electric quantity sampling synchronization method - Google Patents
A kind of analyses for double circuits on same tower AC electric quantity sampling synchronization method Download PDFInfo
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- CN103248005B CN103248005B CN201310173206.XA CN201310173206A CN103248005B CN 103248005 B CN103248005 B CN 103248005B CN 201310173206 A CN201310173206 A CN 201310173206A CN 103248005 B CN103248005 B CN 103248005B
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- 238000004458 analytical method Methods 0.000 title claims abstract description 45
- 238000005070 sampling Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000001131 transforming effect Effects 0.000 claims abstract description 30
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000004043 responsiveness Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of analyses for double circuits on same tower AC electric quantity sampling synchronization method.First the inventive method is measured analyses for double circuits on same tower m and is held the reverse forward-order current of fault phase
the reverse forward-order current of fault phase is held with n
calculate
leading
angle θ; Then choose and be transferred to m and hold transforming plant protecting device
the analyses for double circuits on same tower m of the t sampling instant that the analyses for double circuits on same tower n end AC electric quantity of sampling instant and m hold transforming plant protecting device to collect holds AC electric quantity to be that synchrodata is for relaying protection computing; Wherein, A, B, C phase on φ=I loop line road, A, B, C phase on II loop line road; N is the sampling number of a fundamental frequency cycles; △ t is sampling interval duration; T is the sampling time.It is zero that the inventive method achieves analyses for double circuits on same tower both-end AC electric quantity sample-synchronous error, and algorithm principle is simple, and the operand increased to computer disposal is very little, does not affect the responsiveness of analyses for double circuits on same tower relaying protection, practical.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System field, specifically relate to a kind of analyses for double circuits on same tower AC electric quantity sampling synchronization method.
Background technology
Because CPU has certain randomness and dispersiveness to the response time that hardware synchronization link proposes to interrupt, causing sample-synchronous precision to there is error, is the intrinsic defect of Hardware synchronous sampling method.The AC sampling synchronous method that relaying protection adopts mainly is divided into two large classes, and a class is when synchronous error is certain, by reducing measure error to the process of sampled data or the correction of measurement result; Equations of The Second Kind reduces measure error by reducing synchronous error.First kind method due to complex disposal process, the large and data processing length consuming time of operand, poor practicability.Equations of The Second Kind method ignores the uneven impact on measurement result of sampling time interval, causes sample-synchronous to there is error.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art existence, a kind of analyses for double circuits on same tower AC electric quantity sampling synchronization method is provided.
For completing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of analyses for double circuits on same tower AC electric quantity sampling synchronization method, its main points are, comprise the steps:
(1) m be arranged on respectively in analyses for double circuits on same tower m end transformer station and analyses for double circuits on same tower n end transformer station is provided to hold transforming plant protecting device and n to hold transforming plant protecting device;
(2) m holds transforming plant protecting device to gather the AC electric quantity of analyses for double circuits on same tower m end; N holds transforming plant protecting device to gather the AC electric quantity of analyses for double circuits on same tower n end, and is held by analyses for double circuits on same tower n AC electric quantity to be transferred to m end transforming plant protecting device by optical-fibre communications; Wherein, m, n are respectively analyses for double circuits on same tower and connect two ends transformer station title;
(3) m holds transforming plant protecting device to utilize Fourier algorithm and six-sequence component to calculate the reverse forward-order current of fault phase of analyses for double circuits on same tower m end
wherein, A, B, C phase on φ=I loop line road, A, B, C phase on II loop line road;
M holds transforming plant protecting device to utilize Fourier algorithm and six-sequence component to calculate the reverse forward-order current of fault phase of analyses for double circuits on same tower n end
wherein, A, B, C phase on φ=I loop line road, A, B, C phase on II loop line road;
(4) m holds transforming plant protecting device to calculate
leading
angle
(5) m holds transforming plant protecting device to choose to be transferred to m to hold transforming plant protecting device
the analyses for double circuits on same tower m of the t sampling instant that the analyses for double circuits on same tower n end AC electric quantity of sampling instant and m hold transforming plant protecting device to collect holds AC electric quantity to be that synchrodata is for relaying protection computing; Wherein, N is the sampling number of a fundamental frequency cycles; △ t is sampling interval duration; T is the sampling time.
Feature of the present invention and technological achievement:
It is zero that the inventive method achieves analyses for double circuits on same tower both-end AC electric quantity sample-synchronous error, and principle is simple, and the operand increased to computer disposal is very little, does not affect the responsiveness of analyses for double circuits on same tower relaying protection, practical.
Accompanying drawing explanation
Fig. 1 is application analyses for double circuits on same tower transmission system schematic diagram of the present invention.
Embodiment
According to Figure of description, technical scheme of the present invention is expressed in further detail below.
Fig. 1 is application analyses for double circuits on same tower transmission system schematic diagram of the present invention.Protective device in the present embodiment is arranged on analyses for double circuits on same tower m respectively and holds transformer station and analyses for double circuits on same tower n to hold in transformer station.M holds transforming plant protecting device to gather the AC electric quantity of analyses for double circuits on same tower m end.N holds transforming plant protecting device to gather the AC electric quantity of analyses for double circuits on same tower n end, and is held by analyses for double circuits on same tower n AC electric quantity to be transferred to m end transforming plant protecting device by optical-fibre communications; Wherein, m, n are respectively analyses for double circuits on same tower and connect two ends transformer station title.
M holds transforming plant protecting device to utilize Fourier algorithm and six-sequence component to calculate the reverse forward-order current of fault phase of analyses for double circuits on same tower m end
wherein, A, B, C phase on φ=I loop line road, A, B, C phase on II loop line road; Six-order component can be divided into forward component and reverse component two kinds, and F represents the reverse component in six-order component.
M holds transforming plant protecting device to utilize Fourier algorithm and six-sequence component to calculate the reverse forward-order current of fault phase of analyses for double circuits on same tower n end
wherein, A, B, C phase on φ=I loop line road, A, B, C phase on II loop line road; Six-order component can be divided into forward component and reverse component two kinds, and F represents the reverse component in six-order component.
M holds transforming plant protecting device to calculate
leading
angle
M holds transforming plant protecting device to choose to be transferred to m to hold transforming plant protecting device
the analyses for double circuits on same tower m of the t sampling instant that the analyses for double circuits on same tower n end AC electric quantity of sampling instant and m hold transforming plant protecting device to collect holds AC electric quantity to be that synchrodata is for relaying protection computing; Wherein, N is the sampling number of a fundamental frequency cycles; △ t is sampling interval duration; T is the sampling time.
The foregoing is only preferred embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (1)
1. an analyses for double circuits on same tower AC electric quantity sampling synchronization method, is characterized in that, comprises the following steps:
(1) m be arranged on respectively in analyses for double circuits on same tower m end transformer station and analyses for double circuits on same tower n end transformer station is provided to hold transforming plant protecting device and n to hold transforming plant protecting device;
(2) m holds transforming plant protecting device to gather the AC electric quantity of analyses for double circuits on same tower m end; N holds transforming plant protecting device to gather the AC electric quantity of analyses for double circuits on same tower n end, and is held by analyses for double circuits on same tower n AC electric quantity to be transferred to m end transforming plant protecting device by optical-fibre communications; Wherein, m, n are respectively analyses for double circuits on same tower and connect two ends transformer station title;
(3) m holds transforming plant protecting device to utilize Fourier algorithm and six-sequence component to calculate the reverse forward-order current of fault phase of analyses for double circuits on same tower m end
wherein, A, B, C phase on φ=I loop line road, A, B, C phase on II loop line road;
M holds transforming plant protecting device to utilize Fourier algorithm and six-sequence component to calculate the reverse forward-order current of fault phase of analyses for double circuits on same tower n end
wherein, A, B, C phase on φ=I loop line road, A, B, C phase on II loop line road;
and the analyses for double circuits on same tower m of the frame double-circuit line n t sampling instant of holding AC electric quantity and m to hold transforming plant protecting device to collect holds AC electric quantity to be that synchrodata is for relaying protection computing; Wherein, N is the sampling number of a fundamental frequency cycles; △ t is sampling interval duration; T is the sampling time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310173206.XA CN103248005B (en) | 2013-05-10 | 2013-05-10 | A kind of analyses for double circuits on same tower AC electric quantity sampling synchronization method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310173206.XA CN103248005B (en) | 2013-05-10 | 2013-05-10 | A kind of analyses for double circuits on same tower AC electric quantity sampling synchronization method |
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| CN103248005A CN103248005A (en) | 2013-08-14 |
| CN103248005B true CN103248005B (en) | 2016-04-20 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105891579A (en) * | 2016-03-29 | 2016-08-24 | 国网福建省电力有限公司 | Method of realizing synchronization of sampling values of double circuit lines on the same tower by using fault opposite negative phase-sequence current phase characteristics |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2290775A1 (en) * | 2009-08-31 | 2011-03-02 | ABB Research Ltd. | A method of fault phase selection and fault type determination |
| CN102623966A (en) * | 2012-04-01 | 2012-08-01 | 许继集团有限公司 | Differential protection method for bus |
-
2013
- 2013-05-10 CN CN201310173206.XA patent/CN103248005B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2290775A1 (en) * | 2009-08-31 | 2011-03-02 | ABB Research Ltd. | A method of fault phase selection and fault type determination |
| CN102623966A (en) * | 2012-04-01 | 2012-08-01 | 许继集团有限公司 | Differential protection method for bus |
Non-Patent Citations (2)
| Title |
|---|
| 利用两端非同步电流的同杆双回线故障定位研究;索南加乐等;《电工技术学报》;20040831;第19卷(第8期);第100-106页 * |
| 基于相位特性的同杆双回线非同步故障定位研究;朱卓玲;《电工电气》;20120229(第2期);第18-22页 * |
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| CN103248005A (en) | 2013-08-14 |
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