CN107677919B - A kind of disconnection fault recognition methods of the high-voltage alternating route based on both-end amount - Google Patents
A kind of disconnection fault recognition methods of the high-voltage alternating route based on both-end amount Download PDFInfo
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- CN107677919B CN107677919B CN201710828363.8A CN201710828363A CN107677919B CN 107677919 B CN107677919 B CN 107677919B CN 201710828363 A CN201710828363 A CN 201710828363A CN 107677919 B CN107677919 B CN 107677919B
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- 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 discloses a kind of disconnection fault recognition methods of high-voltage alternating route based on both-end amount, comprising: route both ends three-phase voltage phasor and three-phase current phasor is obtained by calculation；According to line impedance parameter and route both ends three-phase current phasor, the three-phase that route both ends are calculated calculates voltage phasor landing, according to route both ends three-phase voltage phasor, the three-phase measurement voltage phasor landing at route both ends is calculated, the modulus value for calculating the difference of voltage phasor landing and measurement voltage phasor landing phasor by route both ends are mutually calculated separately, obtain the voltage drop drop of each phase, by the size of the size and electric current phasor modulus value and electric current phasor modulus value setting valve that are mutually respectively compared voltage drop drop and voltage drop drop setting valve, identify whether the phase shows disconnection fault according to judging result.
Description
Technical field
The invention belongs to field of relay protection in power, more particularly, to a kind of high-voltage alternating based on both-end amount
The disconnection fault recognition methods of route.
Background technique
China city high-voltage fence generallys use the means that overhead transmission line is transmitted as electric energy at present, and overhead transmission line is exposed to
In wilderness, it is easy to be struck by lightning and external force is destroyed and various disconnection faults occur, become the inducement of some personal injuries.Overhead line
The situations such as broken string rear port two sides conducting wire is earth-free or non-electrical source conducting wire lands, which occur, for road not will form apparent failure spy
Sign, the protective relaying device installed at present can not effectively differentiate disconnection fault, cannot cut off faulty line in time.
Summary of the invention
Aiming at the problem that existing high-voltage alternating route lacks the recognition methods specifically for disconnection fault, the purpose of the present invention
It is to propose a kind of disconnection fault recognition methods of high-voltage alternating route based on both-end amount.This method can be sentenced fast and reliablely
Other high-voltage alternating line disconnection failure, be able to solve at present lack specifically for disconnection fault recognition methods the problem of.
The present invention provides a kind of disconnection fault recognition methods of high-voltage alternating route based on both-end amount, including walk as follows
It is rapid:
S1: acquisition transmission line of alternation current both ends three-phase voltage signal and three-phase current signal；According to transmission line of alternation current two
It holds three-phase voltage signal to obtain route both ends three-phase voltage phasor, and is obtained according to transmission line of alternation current both ends three-phase current signal
Route both ends three-phase current phasor；
S2: voltage phase is calculated according to the three-phase that line impedance parameter and route both ends three-phase current phasor obtain route both ends
Amount landing；The three-phase measurement voltage phasor landing at route both ends is obtained according to route both ends three-phase voltage phasor；
S3: by the single-phase measurement voltage phase of single-phase single-phase calculating the voltage phasor landing and route both ends for obtaining route both ends
The modulus value of difference between amount landing, it is poor to land as the phase voltage；
S4: judge whether phase voltage landing difference is greater than the poor setting valve of phase voltage landing by single-phase, and judge phase electricity
Whether stream phasor modulus value is less than electric current phasor modulus value setting valve, if phase voltage landing difference is greater than the poor setting valve of phase voltage landing
And the phase current phasor modulus value is less than electric current phasor modulus value setting valve, then mutually there is disconnection fault in this；Otherwise, which does not break
Line failure.
Preferably, route three-phase current phasor is obtained according to route both ends three-phase current phasor in step S2, according to route
The three-phase at three-phase current phasor and line impedance gain of parameter route both ends calculates voltage phasor landing.
Preferably, according to formula in step S2Obtain route three-phase current phasor；
Wherein,It is followed successively by route a, b, c phase current phasor,It is followed successively by route one end
A, b, c phase current phasor,To be followed successively by route other end a, b, c phase current phasor.
Preferably, step S2 is according to formulaThe three-phase for obtaining route both ends calculates
Voltage phasor landing；
Wherein,It is followed successively by route a, b, c phase current phasor, Zaa、Zbb、ZccIt is followed successively by route a, b, c phase
Self-impedance, ZijFor the mutual impedance between route i phase and j phase, i ≠ j, i=a, b, c, j=a, b, c.
Preferably, step S2 is according to formulaThe three-phase for obtaining route both ends measures voltage phasor
Landing；
Wherein,It is followed successively by route both ends a, b, c phase and measures voltage phasor landing, It is followed successively by route one end a, b, c phase voltage phasor,It is followed successively by the route other end a, b, c phase electricity
Press phasor.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
The present invention is by acquisition HVAC power transmission line both ends three-phase voltage and three-phase current signal, the line being calculated
Road both ends three-phase voltage phasor and three-phase current phasor, then according to line impedance parameter, route both ends three-phase current phasor, meter
It calculates and obtains the three-phase calculating voltage phasor landing at route both ends, and according to route both ends three-phase voltage phasor, line is calculated
The three-phase measurement voltage phasor landing at road both ends.
The difference for further calculating voltage phasor landing by route both ends are mutually calculated separately and measuring voltage phasor landing phasor
Modulus value, obtain the voltage drop drop of each phase.By the size for being mutually respectively compared voltage drop drop Yu voltage drop drop setting valve
And the size of electric current phasor modulus value and electric current phasor modulus value setting valve.If the voltage drop drop of this phase is greater than voltage drop drop
Setting valve, while this phase current phasor modulus value is less than electric current phasor modulus value setting valve, then judges that this separate disconnection fault occurs.
A kind of disconnection fault recognition methods of high-voltage alternating route based on both-end amount proposed by the present invention, is able to solve mesh
The problem of preceding recognition methods lacked specifically for disconnection fault.
Detailed description of the invention
Fig. 1 is high-voltage AC transmission system structure diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of process of the disconnection fault recognition methods of the high-voltage alternating route based on both-end amount provided by the invention
Figure；
Fig. 3 is 220KV high-voltage AC transmission system structure diagram provided in an embodiment of the present invention；
Fig. 4 is 220KV high-voltage AC transmission system of the invention when disconnection fault occurs for first line a phase line, first
The a phase line computation voltage landing at route both ends, measurement voltage landing change curve；Wherein, 4 (a) be first line both ends a phase
Line computation voltage landing change curve, Fig. 4 (b) are that a phase line at first line both ends measures voltage landing change curve；
Fig. 5 is 220KV high-voltage AC transmission system of the invention when disconnection fault occurs for first line a phase line, first
The voltage drop drop change curve of each phase line of route；Wherein, the voltage drop drop change curve of 5 (a) first line a phase lines, 5
(b) the voltage drop drop change curve of first line b phase line, the voltage drop drop change curve of 5 (c) first line c phases；
Fig. 6 is 220KV high-voltage AC transmission system of the invention when disconnection fault occurs for first line a phase line, first
Route a phase current change curve；
Wherein, 1 it is sending end AC system equivalent power supply, 2 be the first bus, 3 is first line a the first relay protection of phase line
Device, 4 be first line a phase line, 5 be the second protective relaying device of first line a phase line, 6 be first line b phase line first after
Electrical protective device, 7 be first line b phase line, 8 be the second protective relaying device of first line b phase line, 9 be first line c phase line
First protective relaying device, 10 be first line c phase line, 11 be the second protective relaying device of first line c phase line, 12 be second
Bus, 13 are receiving end AC system equivalent power supply.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
A kind of disconnection fault recognition methods embodiment of high-voltage alternating route based on both-end amount provided by the invention, the party
Method based on high-voltage alternating system structure it is as shown in Figure 1, comprising: sending end AC system equivalent power supply 1, the first bus 2, First Line
Road the first protective relaying device of a phase line 3, first line a phase line 4, the second protective relaying device of first line a phase line 5, First Line
Road the first protective relaying device of b phase line 6, first line b phase line 7, the second protective relaying device of first line b phase line 8, First Line
Road the first protective relaying device of c phase line 9, first line c phase line 10, the second protective relaying device of first line c phase line 11, second
Bus 12, receiving end AC system equivalent power supply 13.Sending exchange equivalent power supply 1 is connected with the first bus 2, the first bus 2
It is connected by first line a phase line 4, first line b phase line 7, first line c phase line 10 with the second bus 12, the second bus 12
It is connected with receiving end AC system equivalent power supply 13.The first protective relaying device of first line a phase line 3 is mounted on the first bus 2 company
4 exit of first line a phase line connect, the second protective relaying device of first line a phase line 5 are mounted on the connection of the second bus 12
4 exit of first line a phase line；The first protective relaying device of first line b phase line 6 installs the First Line of the first bus 2 connection
7 exit of road b phase line, the second protective relaying device of first line b phase line 8 are mounted on the first line b of the second bus 12 connection
7 exit of phase line；The first protective relaying device of first line c phase line 9 is mounted on the first line c phase line of the first bus 2 connection
10 exits, the second protective relaying device of first line c phase line 11 are mounted on the first line c phase line 10 of the second bus 12 connection
Exit.
Fig. 2 is a kind of disconnection fault recognition methods process of the high-voltage alternating route based on both-end amount provided by the invention
Figure, this method comprises:
S1: acquisition transmission line of alternation current both ends three-phase voltage signal and three-phase current signal；According to transmission line of alternation current two
It holds three-phase voltage signal to obtain route both ends three-phase voltage phasor, and is obtained according to transmission line of alternation current both ends three-phase current signal
Route both ends three-phase current phasor；
S2: voltage phase is calculated according to the three-phase that line impedance parameter and route both ends three-phase current phasor obtain route both ends
Amount landing；The three-phase measurement voltage phasor landing at route both ends is obtained according to route both ends three-phase voltage phasor；
S3: by the single-phase measurement voltage phase of single-phase single-phase calculating the voltage phasor landing and route both ends for obtaining route both ends
The modulus value of difference between amount landing, by the single-phase measurement voltage of single-phase calculating the voltage phasor landing and route both ends at route both ends
The modulus value of difference is landed poor as the phase voltage between phasor landing；
S4: judge whether phase voltage landing difference is greater than the poor setting valve of phase voltage landing by single-phase, and judge phase electricity
Whether stream phasor modulus value is less than electric current phasor modulus value setting valve, if phase voltage landing difference is greater than the poor setting valve of phase voltage landing
And the phase current phasor modulus value is less than electric current phasor modulus value setting valve, then mutually there is disconnection fault in this；Otherwise, which does not break
Line failure.
As an embodiment of the present invention, route three-phase electricity is obtained according to route both ends three-phase current phasor in step S2
Phasor is flowed, voltage phasor drop is calculated according to the three-phase at route three-phase current phasor and line impedance gain of parameter route both ends
It falls.
Wherein, the formula of route three-phase current phasor is obtained are as follows:
The three-phase for obtaining route both ends calculates the formula of voltage phasor landing are as follows:
Wherein,It is followed successively by route a, b, c phase current phasor,It is followed successively by route one end
A, b, c phase current phasor,To be followed successively by route other end a, b, c phase current phasor, Zaa、Zbb、ZccIt is followed successively by line
Road a, b, c phase self-impedance, ZijFor the mutual impedance between route i phase and j phase, i ≠ j, i=a, b, c, j=a, b, c.
In embodiment provided by the invention, the formula of the three-phase measurement voltage phasor landing at route both ends is obtained are as follows:
Wherein,It is followed successively by a at route both ends, b, c phase measures voltage phasor landing, It is followed successively by route one end a, b, c phase voltage phasor,It is followed successively by the route other end a, b, c phase electricity
Press phasor.
In embodiment provided by the invention, step S3 obtains the formula of each phase voltage landing difference of route are as follows:
Wherein,For route both endsVoltage phasor landing is mutually calculated,For route both endsMutually measurement voltage
Phasor landing,It is poor to land for phase voltage,
In embodiments of the present invention, step 4 and step 5 differentiate according to following formula:
Wherein,ForPhase voltage landing is poor, ForPhase current phasor；UsetFor voltage landing
Poor setting valve, UsetValue is the 5%~20% of route voltage rating；IsetFor electric current phasor modulus value setting valve, line is comprehensively considered
The factors such as road length, line voltage distribution grade, IsetValue is 2~4 times of route capacitance current under route nominal operating conditions.
Above-mentioned two inequality is satisfied simultaneously after disconnection fault occurs, then is determined as routePhase disconnection fault, it is no
Then determine routeMutually without disconnection fault.
The present invention is calculated by acquisition HVAC power transmission line both ends three-phase voltage signal and three-phase current signal
Route both ends three-phase voltage phasor and route both ends three-phase current phasor, then according to line impedance parameter and route both ends three
Phase current phasor, the three-phase that route both ends are calculated calculate voltage phasor landing, and according to route both ends three-phase voltage phase
The three-phase measurement voltage phasor landing at route both ends is calculated, further by the calculating electricity for mutually calculating separately route both ends in amount
The modulus value for pressing the difference of the measurement voltage phasor landing phasor at phasor landing and route both ends, obtains the voltage drop drop of each phase.
By the size and electric current phasor modulus value and electric current phasor modulus value for being mutually respectively compared voltage drop drop and voltage drop drop setting valve
The size of setting valve.If the voltage drop drop of this phase is greater than voltage drop drop setting valve, while this phase current phasor modulus value is small
In electric current phasor modulus value setting valve, then judge this it is separate there is disconnection fault, otherwise, which does not occur disconnection fault.The present invention
The disconnection fault recognition methods of the high-voltage alternating route based on both-end amount proposed is able to solve and lacks at present specifically for broken string
The problem of recognition methods of failure.
A kind of another embodiment of disconnection fault recognition methods of high-voltage alternating route based on both-end amount provided by the invention
In, this method based on high-voltage alternating system be 220KV high-voltage AC transmission system, structural schematic diagram is as shown in Figure 3.First
The fault initiating element of the first protective relaying device of route a phase line 3 and the second protective relaying device of first line 5 is because of First Line
The doubtful generation disconnection fault starting of road a phase line, carries out disconnection fault identification using following steps:
Step 1: being calculated according to each phase voltage signal in first line route both ends and each phase current signal in both ends of acquisition
To each phase current phasor of each phase voltage phasor in first line route both ends and both ends.
Step 2: first line three-phase line electric current phasor is obtained according to the following formula:
Wherein,It is followed successively by route a, b, c phase current phasor,It is close for first line
First bus 2 end a, b, c phase current phasor,It is first line close to 12 end a of the second bus, b, c phase current
Phasor；
The three-phase for obtaining first line both ends according to the following formula calculates voltage phasor landing:
Wherein,It is followed successively by a at first line both ends, b, c phase calculates voltage phasor landing, impedance
In matrix, diagonal entry is the every phase self-impedance of first line, and off diagonal element is first line mutual impedance, this implementation
It is 100 kms that first line length is taken in example.
The three-phase measurement voltage phasor landing at first line both ends is obtained according to the following formula:
Wherein,It is followed successively by each mutually measurement voltage phasor landing at first line both ends,First line is followed successively by close to 2 end a of the first bus, b, c phase voltage phasor, It is followed successively by
First line is close to 12 end a of the second bus, b, c phase voltage phasor.
Step 3: the voltage drop drop of each phase line of first line is calculated according to the following formula:
Wherein,Each phase line voltage drop drop of first line,
Step 4: judging whether phase voltage landing difference is greater than the poor setting valve of phase voltage landing by single-phase, and judge the phase
Whether electric current phasor modulus value is less than electric current phasor modulus value setting valve, if phase voltage landing difference is greater than phase voltage landing difference adjusting
It is worth and the phase current phasor modulus value is less than electric current phasor modulus value setting valve, then this disconnection fault mutually occurs；Otherwise, which does not occur
Disconnection fault.
In embodiments of the present invention, differentiate whether a phase occurs disconnection fault according to such as lower inequality:
Wherein, Δ Uerror_aIt is poor to land for first line a phase voltage；For route first line a phase line electric current phasor；
UsetFor voltage drop drop setting valve, U is takenset=25KV；IsetFor electric current phasor modulus value setting valve, I is takenset=0.2KA.
Above-mentioned two inequality are satisfied simultaneously after failure, are determined as first line a phase line disconnection fault, otherwise
Determine first line a phase line without disconnection fault.
Fig. 4 is for 220KV high-voltage AC transmission system of the invention in first line a phase in f1When disconnection fault occurs for place,
The a phase line measurement voltage phasor landing at first line both ends and calculating voltage phasor landing amplitude change curve；Fig. 5 is the present invention
220KV high-voltage AC transmission system in first line a phase in f1When disconnection fault occurs for place, each phase voltage landing of first line
Poor change curve；Fig. 6 is for 220KV high-voltage AC transmission system of the invention in first line a phase in f1Disconnection fault occurs for place
When, first line a phase current change curve.As can be seen that the electricity of the first line a phase line to break down from Fig. 4-Fig. 5
Pressure drop drop is far longer than first line other phase line voltage drop drops not broken down, while being evident that First Line
The voltage drop drop of road a phase line meets first item in above-mentioned inequality, and first line other phase lines are unsatisfactory for.By Fig. 6
As can be seen that first line a phase line electric current phasor is substantially reduced, meet Section 2 in above-mentioned inequality, for first line a
Two formulas are set up simultaneously in phase line criterion, therefore are determined as that disconnection fault occurs for first line a phase line.
A kind of high-voltage alternating circuit breaking guard method based on both-end amount provided in an embodiment of the present invention can effectively be sentenced
Disconnection fault inside and outside other route.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (5)
1. a kind of disconnection fault recognition methods of the high-voltage alternating route based on both-end amount, which comprises the steps of:
S1: acquisition transmission line of alternation current both ends three-phase voltage signal and three-phase current signal；According to the transmission line of alternation current two
Three-phase voltage signal is held to obtain route both ends three-phase voltage phasor, and according to transmission line of alternation current both ends three-phase current signal
Obtain route both ends three-phase current phasor；
S2: voltage phase is calculated according to the three-phase that line impedance parameter and the route both ends three-phase current phasor obtain route both ends
Amount landing；The three-phase measurement voltage phasor landing at route both ends is obtained according to the route both ends three-phase voltage phasor；
S3: by the single-phase single-phase calculating voltage phasor landing for obtaining the route both ends and the single-phase measurement at route both ends electricity
The modulus value for pressing difference between phasor landing, it is poor to land as the phase voltage；
S4: judge whether phase voltage landing difference is greater than the poor setting valve of phase voltage landing by single-phase, and judge the phase current phase
Whether amount modulus value is less than electric current phasor modulus value setting valve, if phase voltage landing difference is greater than the poor setting valve of phase voltage landing and should
Phase current phasor modulus value is less than electric current phasor modulus value setting valve, then this disconnection fault mutually occurs；Otherwise, which does not occur broken string event
Barrier.
2. disconnection fault recognition methods as described in claim 1, which is characterized in that according to route both ends three in the step S2
Phase current phasor obtains route three-phase current phasor, according to the route three-phase current phasor and line impedance gain of parameter line
The three-phase at road both ends calculates voltage phasor landing.
3. disconnection fault recognition methods as claimed in claim 2, which is characterized in that according to formula in the step S2Obtain route three-phase current phasor；
Wherein,It is followed successively by route a, b, c phase current phasor,It is followed successively by route one end a, b, c
Phase current phasor,To be followed successively by route other end a, b, c phase current phasor.
4. disconnection fault recognition methods as claimed in claim 2 or claim 3, which is characterized in that the step S2 is according to formulaThe three-phase for obtaining the route both ends calculates voltage phasor landing；
Wherein,It is followed successively by route a, b, c phase current phasor, Zaa、Zbb、ZccIt is followed successively by route a, b, c phase hinders certainly
It is anti-, ZijFor the mutual impedance between route i phase and j phase, i ≠ j, i=a, b, c, j=a, b, c.
5. disconnection fault recognition methods as described in any one of claims 1 to 3, which is characterized in that step S2 is according to formulaObtain the three-phase measurement voltage phasor landing at route both ends；
Wherein,It is followed successively by route both ends a, b, c phase and measures voltage phasor landing, According to
Secondary is route one end a, b, c phase voltage phasor,It is followed successively by route other end a, b, c phase voltage phasor.
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| CN109375030A (en) * | 2018-09-06 | 2019-02-22 | 深圳供电局有限公司 | The recognition methods of high voltage overhead lines disconnection fault and device |
| CN110907746B (en) * | 2018-09-18 | 2022-08-30 | 深圳供电局有限公司 | High-voltage alternating-current line open-circuit fault identification method, device, equipment and storage medium |
| CN110780235B (en) * | 2019-11-12 | 2022-05-31 | 深圳供电局有限公司 | Disconnection fault identification method and system based on phase-to-phase voltage difference |
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| CN102707194A (en) * | 2012-05-17 | 2012-10-03 | 中国电力科学研究院 | Power distribution network broken line fault location method |
| CN102944804A (en) * | 2012-11-13 | 2013-02-27 | 航天科工深圳（集团）有限公司 | Overhead line fault detection system |
| CN105182151A (en) * | 2014-05-27 | 2015-12-23 | 通用汽车环球科技运作有限责任公司 | Vmethod and apparatus for open-wire fault detection and diagnosis in a controller area network |
| CN105891680A (en) * | 2016-06-16 | 2016-08-24 | 国网山东省电力公司滨州供电公司 | 10kV distribution line multiphase disconnection fault determination method based on three-phase voltage and current |
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- 2017-09-14 CN CN201710828363.8A patent/CN107677919B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707194A (en) * | 2012-05-17 | 2012-10-03 | 中国电力科学研究院 | Power distribution network broken line fault location method |
| CN102944804A (en) * | 2012-11-13 | 2013-02-27 | 航天科工深圳（集团）有限公司 | Overhead line fault detection system |
| CN105182151A (en) * | 2014-05-27 | 2015-12-23 | 通用汽车环球科技运作有限责任公司 | Vmethod and apparatus for open-wire fault detection and diagnosis in a controller area network |
| CN105891680A (en) * | 2016-06-16 | 2016-08-24 | 国网山东省电力公司滨州供电公司 | 10kV distribution line multiphase disconnection fault determination method based on three-phase voltage and current |
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