CN110261714A - A kind of short trouble rapid detection method applied to current limiter - Google Patents
A kind of short trouble rapid detection method applied to current limiter Download PDFInfo
- Publication number
- CN110261714A CN110261714A CN201910519662.2A CN201910519662A CN110261714A CN 110261714 A CN110261714 A CN 110261714A CN 201910519662 A CN201910519662 A CN 201910519662A CN 110261714 A CN110261714 A CN 110261714A
- Authority
- CN
- China
- Prior art keywords
- current
- short
- fault detection
- short trouble
- fault
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The invention proposes a kind of short trouble rapid detection methods applied to current limiter.The transmission line of electricity three-phase current quadratic sum of present invention calculating current limiter side；Calculate fault detection amount；It is compared according to failure determination threshold value with fault detection amount, if fault detection amount is greater than failure determination threshold value, is judged as short trouble, output short-circuit fault-signal；If fault detection amount is not more than failure determination threshold value, fault-signal is not exported.The present invention can rapidly and accurately reflect short-circuit fault of power system transient signal variation characteristic, fast and reliable identification short trouble, and then cut-off route for breaker fast and stable and provide more efficient guarantee.
Description
Technical field
The present invention relates to Power System Faults Detection technical fields, and in particular to a kind of short trouble applied to current limiter
Rapid detection method.
Background technique
Grow as electric system continues to develop, power system capacity scale and voltage class are continuously improved, especially in high-voltage electricity
In net, short circuit current is exceeded to have become threat system stable operation, influences the major issue of power quality.At present frequently with access
The measure of fault current limiter solves short circuit current excessive problem.After short trouble occurs, in order to quickly limit short-circuit electricity
Stream inhibits the exceeded bring harm of short circuit current, it is desirable that put into fault current limiter in a very short period of time, therefore study quickly accurate
Short circuit failure detection method be the fast and reliable necessary condition to put into operation of fault current limiter.
Fault detection technique is particularly significant for current limiter operational effect, due to the particularity of current limiter, is applied to current limliting
The short circuit failure detection method rapidity requirement of device is higher, needs quickly to identify failure in short trouble generation moment, makes current limliting
Device puts into operation.Existing fault detection method requires greatly 3 milliseconds and its above time, and in certain non-faulting operating conditions
Such as excitation surge current, reactive compensation etc., system protection can issue erroneous judgement signal.It is most of to examine although there are many fault detection method
Survey method can not quickly, it is reliable, accurately identify short circuit fault signal, become urgent problem to be solved in the prior art.
Summary of the invention
The purpose of the present invention is to provide a kind of short trouble rapid detection methods applied to current limiter, surpass for solving
Impact of the short circuit current to electric system and equipment when high voltage network short-circuit fault, within the allowable range by short circuit current limitation,
The technological difficulties in grid network and annulation process are solved, power system transient stability is improved, is that high-voltage fence current limiter is fast
The key that speed reliably puts into operation.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of short trouble rapid detection method applied to current limiter, comprising the following steps:
Step 1: calculating the transmission line of electricity three-phase current quadratic sum of current limiter side；
Step 2: calculating fault detection amount；
Step 3: failure determination threshold value is compared with fault detection amount, if fault detection amount is greater than failure determination threshold value,
Then it is judged as short trouble, output short-circuit fault-signal；If fault detection amount is not more than failure determination threshold value, failure is not exported
Signal.
Preferably, it is as follows to calculate three-phase current signal quadratic sum in step 1:
When system operates normally:
Wherein:
ImA=ImB=ImC=Im
It can obtain:
When short trouble occurs:
If single-phase earthing fault occurs:
If two-phase short-circuit fault occurs:
If three phase short circuit fault occurs:
Wherein, i (t) is short-circuit current, and SSC is three-phase current quadratic sum, iAFor A phase current, iBFor B phase current, iC
For C phase current, ImFor steady-state current amplitude, Im' it is AC compounent amplitude, I0For attenuating dc component amplitude, θ is phase angle,For
Failure initial phase, τ are DC component damping time constant；
Preferably, calculating fault detection amount FDC (t described in step 2n) are as follows:
Signal is handled by the way of shifting data window, taking data window length is Ts=10ms, current time tn, every number
It is Δ t=t according to window movable lengthn-tn-1=1ms, SC (tn) it is current time intermediate quantity, SC (tn-1) it is tn-1Moment intermediate quantity,
FDC(tn) it is current time fault detection amount.
Preferably, be compared by failure determination threshold value with fault detection amount described in step 3, specifically:
It is as follows that short trouble detects logic judgment condition:
FDC(tn) > TH
Wherein, FDC (tn) indicate tnMoment fault detection amount, TH representing fault detection threshold value, FDC (t when short troublen)
Can rapid increase, when fault detection amount be greater than failure determination threshold value, then be judged as short trouble, to current limiter output short-circuit failure
Signal, the movement of current limiter ontology high-speed switch, current limiter puts into operation, when fault detection amount is not more than failure determination threshold value, then
Short trouble does not occur for judgement, does not export fault-signal.
Beneficial effects of the present invention:
A kind of short trouble rapid detection method applied to current limiter of the present invention utilizes back-and-forth motion data window
The ratio between three-phase current quadratic sum mean value is used as fault detection amount, can rapidly and accurately reflect that high voltage network short-circuit fault transient state is believed
Number variation characteristic, fast and reliable identification short trouble, and then more efficient guarantee is provided for current limiter fast and stable investment.
Detailed description of the invention
It, below will be to tool for the more detailed description specific embodiment of the invention or current short trouble detection technique scheme
Attached drawing needed for body embodiment or current short trouble detection technique scheme explanation is briefly introduced.The following drawings is only shown
Certain embodiments of the present invention is gone out, therefore has been not construed as the restriction to range, those of ordinary skill in the art have been come
It says, without creative efforts, other various forms of modifications or variation can also be carried out according to these attached drawings.
Fig. 1: for short circuit failure detection method flow chart of the invention；
Fig. 2: short circuit failure detection method testing result.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
A kind of short trouble applied to current limiter of the present invention will quickly be detected with specific embodiment below
Method is further detailed:
For the present invention on matlab platform, to have built IEEE-9 node system model, which includes IEEE-9 node,
3 generators, 3 transformers, 6 routes, 3 loads, route use Bei Jielong model, frequency 50Hz, voltage rating
220kV, relevant parameter such as table 1, fault point occur among route 2, after considering that four kinds of short trouble operating conditions, failure occur.
As shown in Figure 1, a kind of short trouble rapid detection method applied to current limiter of the present invention, including it is following
Step:
Step 1: calculating the transmission line of electricity three-phase current quadratic sum of current limiter side；
It is as follows that three-phase current signal quadratic sum is calculated in step 1:
When system operates normally:
Wherein:
ImA=ImB=ImC=Im
It can obtain:
When short trouble occurs:
If single-phase earthing fault occurs:
If two-phase short-circuit fault occurs:
If three phase short circuit fault occurs:
Wherein, i (t) is short-circuit current, and SSC is three-phase current quadratic sum, iAFor A phase current, iBFor B phase current, iC
For C phase current, ImFor steady-state current amplitude, Im' it is AC compounent amplitude, I0For attenuating dc component amplitude, θ is phase angle,
For failure initial phase, τ is DC component damping time constant.
Step 2: calculating fault detection amount；
Fault detection amount FDC (t is calculated described in step 2n) are as follows:
Signal is handled by the way of shifting data window, taking data window length is Ts=10ms, current time tn, every number
It is Δ t=t according to window movable lengthn-tn-1=1ms, SC (tn) it is current time intermediate quantity, SC (tn-1) it is tn-1Moment intermediate quantity,
FDC(tn) it is current time fault detection amount.
Step 3: failure determination threshold value is compared with fault detection amount, if fault detection amount is greater than failure determination threshold value,
Then it is judged as short trouble, output short-circuit fault-signal；If fault detection amount is not more than failure determination threshold value, failure is not exported
Signal.
It is compared by failure determination threshold value with fault detection amount described in step 3, specifically:
It is as follows that short trouble detects logic judgment condition:
FDC(tn) > TH
Wherein, FDC (tn) indicate tnMoment fault detection amount, TH representing fault detection threshold value, FDC (t when short troublen)
Can rapid increase, when fault detection amount be greater than failure determination threshold value, then be judged as short trouble, to current limiter output short-circuit failure
Signal, the movement of current limiter ontology high-speed switch, current limiter puts into operation, when fault detection amount is not more than failure determination threshold value, then
Short trouble does not occur for judgement, does not export fault-signal.
After considering that four kinds of short trouble operating conditions, failure occur, short circuit failure detection method testing result is as shown in Figure 2.Fig. 2
The result shows that a kind of short trouble rapid detection method applied to current limiter proposed by the present invention can quick and precisely detect it is short
Road failure provides a strong guarantee for fast and reliable put into operation of current limiter.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.Although referring to aforementioned each implementation
Invention is explained in detail for example, those skilled in the art still can according to previous embodiment or attached drawing into
Other various forms of modifications of row or variation.Here can not all embodiments or technical solution be carried out with exhaustion, all hairs
Modification, replacement in bright principle etc., should be included in the present invention claims protection scope in.
Claims (4)
1. a kind of short trouble rapid detection method applied to current limiter, which comprises the following steps:
Step 1: calculating the transmission line of electricity three-phase current quadratic sum of current limiter side；
Step 2: calculating fault detection amount；
Step 3: failure determination threshold value is compared with fault detection amount, if fault detection amount is greater than failure determination threshold value, is sentenced
Break as short trouble, output short-circuit fault-signal；If fault detection amount is not more than failure determination threshold value, failure letter is not exported
Number.
2. the short trouble rapid detection method according to claim 1 applied to current limiter, it is characterised in that: step 1
Middle calculating three-phase current signal quadratic sum is as follows:
When system operates normally:
Wherein:
ImA=ImB=ImC=Im
It can obtain:
When short trouble occurs:
If single-phase earthing fault occurs:
If two-phase short-circuit fault occurs:
If three phase short circuit fault occurs:
Wherein, i (t) is short-circuit current, and SSC is three-phase current quadratic sum, iAFor A phase current, iBFor B phase current, iCFor C
Phase current, ImFor steady-state current amplitude, Im' it is AC compounent amplitude, I0For attenuating dc component amplitude, θ is phase angle,For event
Hinder initial phase, τ is DC component damping time constant.
3. the short trouble rapid detection method according to claim 1 applied to current limiter, it is characterised in that: step 2
The calculating fault detection amount FDC (tn) are as follows:
Signal is handled by the way of shifting data window, taking data window length is Ts=10ms, current time tn, each data window
Movable length is Δ t=tn-tn-1=1ms, SC (tn) it is current time intermediate quantity, SC (tn-1) it is tn-1Moment intermediate quantity, FDC
(tn) it is current time fault detection amount.
4. the short trouble rapid detection method according to claim 1 applied to current limiter, it is characterised in that: step 3
Described in be compared by failure determination threshold value with fault detection amount, specifically:
It is as follows that short trouble detects logic judgment condition:
FDC(tn) > TH
Wherein, FDC (tn) indicate tnMoment fault detection amount, TH representing fault detection threshold value, FDC (t when short troublen) can be fast
Speed rise, when fault detection amount be greater than failure determination threshold value, then be judged as short trouble, to current limiter output short-circuit failure believe
Number, the movement of current limiter ontology high-speed switch, current limiter puts into operation, when fault detection amount is not more than failure determination threshold value, then sentences
It is disconnected that short trouble does not occur, do not export fault-signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910519662.2A CN110261714B (en) | 2019-06-17 | 2019-06-17 | Short-circuit fault rapid detection method applied to current limiter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910519662.2A CN110261714B (en) | 2019-06-17 | 2019-06-17 | Short-circuit fault rapid detection method applied to current limiter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110261714A true CN110261714A (en) | 2019-09-20 |
| CN110261714B CN110261714B (en) | 2021-05-04 |
Family
ID=67918548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910519662.2A Active CN110261714B (en) | 2019-06-17 | 2019-06-17 | Short-circuit fault rapid detection method applied to current limiter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110261714B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687477A (en) * | 2019-10-17 | 2020-01-14 | 武汉大学 | Rapid short-circuit fault detection system and method applied to high-voltage substation |
| CN112147536A (en) * | 2020-09-07 | 2020-12-29 | 广东电网有限责任公司广州供电局 | Current-amount-based short-circuit fault rapid detection method |
| CN112345883A (en) * | 2020-10-23 | 2021-02-09 | 刘振盛 | Transmission line hidden danger early warning system based on traveling wave current |
| CN113109671A (en) * | 2021-04-30 | 2021-07-13 | 武汉大学 | Method for accelerating detection of small half-wave stage of fault current |
| CN113253048A (en) * | 2021-04-27 | 2021-08-13 | 南京南瑞继保电气有限公司 | Short-circuit fault detection method and device |
| CN115588972A (en) * | 2022-12-08 | 2023-01-10 | 中国南方电网有限责任公司超高压输电公司广州局 | Short circuit current limiting control system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4918390A (en) * | 1989-04-13 | 1990-04-17 | Pinhas Ziv | Method and system for monitoring the condition of a plurality of electrical devices |
| CN101413982A (en) * | 2007-10-18 | 2009-04-22 | 深圳长城开发科技股份有限公司 | Method and apparatus for detecting short circuit of current loop |
| CN203337763U (en) * | 2013-06-21 | 2013-12-11 | 国家电网公司 | Short-circuit failure judgment device applied to fault current limiter |
| CN103683202A (en) * | 2012-09-20 | 2014-03-26 | 博世力士乐(西安)电子传动与控制有限公司 | Device and method for detecting output earth short circuit condition of frequency converter |
| CN104881709A (en) * | 2015-05-12 | 2015-09-02 | 国家电网公司 | Comprehensive configuration algorithm for optimizing short-circuit current-limiting reactance in electric system |
| JP2015192582A (en) * | 2014-03-28 | 2015-11-02 | トヨタ自動車株式会社 | Current-sensor failure detection apparatus |
| CN106291236A (en) * | 2016-07-29 | 2017-01-04 | 国家电网公司 | Current limiter fault detection method based on transient fault row ripple |
| CN107561400A (en) * | 2017-08-30 | 2018-01-09 | 国家电网公司 | A kind of distribution network short circuit fault quick determination method based on real-time wavelet conversion |
-
2019
- 2019-06-17 CN CN201910519662.2A patent/CN110261714B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4918390A (en) * | 1989-04-13 | 1990-04-17 | Pinhas Ziv | Method and system for monitoring the condition of a plurality of electrical devices |
| CN101413982A (en) * | 2007-10-18 | 2009-04-22 | 深圳长城开发科技股份有限公司 | Method and apparatus for detecting short circuit of current loop |
| CN103683202A (en) * | 2012-09-20 | 2014-03-26 | 博世力士乐(西安)电子传动与控制有限公司 | Device and method for detecting output earth short circuit condition of frequency converter |
| CN203337763U (en) * | 2013-06-21 | 2013-12-11 | 国家电网公司 | Short-circuit failure judgment device applied to fault current limiter |
| JP2015192582A (en) * | 2014-03-28 | 2015-11-02 | トヨタ自動車株式会社 | Current-sensor failure detection apparatus |
| CN104881709A (en) * | 2015-05-12 | 2015-09-02 | 国家电网公司 | Comprehensive configuration algorithm for optimizing short-circuit current-limiting reactance in electric system |
| CN106291236A (en) * | 2016-07-29 | 2017-01-04 | 国家电网公司 | Current limiter fault detection method based on transient fault row ripple |
| CN107561400A (en) * | 2017-08-30 | 2018-01-09 | 国家电网公司 | A kind of distribution network short circuit fault quick determination method based on real-time wavelet conversion |
Non-Patent Citations (3)
| Title |
|---|
| TOSHIFUMI ISE ET AL.: "Hybrid transfer switch with fault current limiting function", 《NINTH INTERNATIONAL CONFERENCE ON HARMONICS AND QUALITY OF POWER. PROCEEDINGS (CAT. NO.00EX441)》 * |
| 戴朝波: "故障电流限制器用故障识别技术综述", 《智能电网》 * |
| 王丽超: "基于快速开关串联补偿型短路故障电流限制器研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687477A (en) * | 2019-10-17 | 2020-01-14 | 武汉大学 | Rapid short-circuit fault detection system and method applied to high-voltage substation |
| CN112147536A (en) * | 2020-09-07 | 2020-12-29 | 广东电网有限责任公司广州供电局 | Current-amount-based short-circuit fault rapid detection method |
| CN112345883A (en) * | 2020-10-23 | 2021-02-09 | 刘振盛 | Transmission line hidden danger early warning system based on traveling wave current |
| CN113253048A (en) * | 2021-04-27 | 2021-08-13 | 南京南瑞继保电气有限公司 | Short-circuit fault detection method and device |
| CN113253048B (en) * | 2021-04-27 | 2022-10-28 | 南京南瑞继保电气有限公司 | Short-circuit fault detection method and device |
| CN113109671A (en) * | 2021-04-30 | 2021-07-13 | 武汉大学 | Method for accelerating detection of small half-wave stage of fault current |
| CN113109671B (en) * | 2021-04-30 | 2022-07-19 | 武汉大学 | Method for accelerating detection of small half-wave stage of fault current |
| CN115588972A (en) * | 2022-12-08 | 2023-01-10 | 中国南方电网有限责任公司超高压输电公司广州局 | Short circuit current limiting control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110261714B (en) | 2021-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110261714A (en) | A kind of short trouble rapid detection method applied to current limiter | |
| Zhalefar et al. | A high-speed adaptive single-phase reclosing technique based on local voltage phasors | |
| CN203276027U (en) | Digital dynamic closed-loop test system of electricity smooth and steady supply device | |
| CN112165078B (en) | Resonant current limiter input control method utilizing short-circuit current change rate | |
| Ding et al. | Peak-ratio analysis method for enhancement of lom protection using m-class pmus | |
| Madzarevic et al. | Overvoltages on EHV transmission lines due to faults and subsequent bypassing of series capacitors | |
| CN114118546A (en) | Overvoltage risk assessment method and system for high-proportion new energy power system | |
| Tariq et al. | Investigation of the Effects of Distributed Generation on Protection Coordination in a Power System | |
| CN100362718C (en) | Fault-tolerant complex judging self adaption high voltage parallel reactor turn-to-turn protection | |
| Chen et al. | Stabilizing switching | |
| Luo et al. | Research on limiting measures for DC component of short circuit current based on fault current limiter and selection of installation site | |
| Wämundsson | Calculating voltage dips in power systems using probability distributions of dip durations and implementation of the Moving Fault Node method | |
| Zheng et al. | Research on the application of traveling wave protection for DC lines in the hybrid HVDC system | |
| Ammar et al. | Performance analysis of fault current limiter (fcl) againts short circuit current at pecangan feeder unit customer service negara | |
| CN115453265B (en) | Island micro-grid fault transient protection method based on initial fault current waveform characteristics | |
| Li et al. | Study on the Calculation Methods for Short-Circuit Current DC Component | |
| CN116632795B (en) | Active power distribution network pilot protection method and system based on sequence components | |
| Bao-Wei et al. | Two-terminal fault location scheme based on distributed parameters of cable-overhead hybrid transmission line | |
| Chen et al. | A Protection Scheme Based on the Current-limiting Reactor Voltage and its Derivation for MMC-MVDC | |
| Nobakhti et al. | A new impedance-based main and backup protection scheme for active distribution lines in ac microgrids. Energies 2021, 14, 274 | |
| Liu et al. | Research on the process of power flow transferring and its identification method | |
| Zhou et al. | Near real time system short-circuit current Online monitoring platform and its application | |
| Sowa et al. | Transferring signals to the secondary side of the transformers in high voltage unloaded lines | |
| Eroshenko et al. | Practical experience in short-circuit current limiting measures implementation | |
| Villas et al. | Calculation of electric field and potential distributions into soil and air media for a ground electrode of an HVDC system |
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 |