CN108427058A - It is a kind of based on synchronize vector overhead transmission line short-circuit impedance measuring device - Google Patents
It is a kind of based on synchronize vector overhead transmission line short-circuit impedance measuring device Download PDFInfo
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- CN108427058A CN108427058A CN201810542003.6A CN201810542003A CN108427058A CN 108427058 A CN108427058 A CN 108427058A CN 201810542003 A CN201810542003 A CN 201810542003A CN 108427058 A CN108427058 A CN 108427058A
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- Prior art keywords
- phase
- transmission line
- impedance relay
- overhead transmission
- impedance
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
-
- 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
-
- 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
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to a kind of power system measuring devices, it is mainly used for the measurement of all kinds of short-circuit impedances of overhead transmission line in electric system, it include three-phase impedance relay device, phase to phase impedance relay-set, three-phase impedance relay device, phase to phase impedance relay-set is electrically connected with current transformer and voltage transformer, current transformer and voltage transformer are electrically connected with synchronized phase measurement device, three-phase impedance relay device, phase to phase impedance relay-set is connected with the first processing unit, realize the measurement of all kinds of short-circuit voltages and electric current that overhead transmission line occurs, pass through the Current Voltage vector analysis processing to synchro measure, determine whether impedance relay acts, judgement fault type and fault location are analyzed to computing impedance.
Description
Technical field
The present invention relates to a kind of power system measuring devices, and it is all kinds of short to be mainly used for overhead transmission line in electric system
The anti-measurement of roadlock.
Background technology
With the continuous development of intelligent grid, distribution network operation scale continues to increase, and operating structure is constantly complicated, and system is defeated
The frequency that short trouble occurs in electric line is increasing.The situation of transmission line of electricity appearance short circuit can be divided into following several：It is single-phase
Shorted to earth, two relative ground circuits, phase fault and three-phase shortcircuit.The system of isolated neutral（Secondary network）It can be
Operate with failure when single-phase short circuit 1-2 hours, and other short troubles occur when should all require the correct quick acting of breaker with
Guarantee system safety.Moreover, for temporary short trouble, system can be excluded by automatic reclosing, and some are permanent
Failure must be by manually excluding, and this requires systems, and fault point can be accurately positioned.The short trouble of conventional electrical distribution net
Detection and location technology are suitable only for radiation type distribution network, are not suitable for network-type power distribution network.Meanwhile it is differential for bus current
For protection, the current synchronization measuring problem at busbar both ends is particularly important, due to not being difference current mistake caused by synchro measure
Accident that is big and then causing bus current differential protection to act happens occasionally.Therefore, short circuit fault of power distribution network orientation problem and
The synchro measure problem of bus current voltage is to ensure that the key that circuit relay protection correctly acts.
Invention content
The present invention is at least one defect overcome described in the above-mentioned prior art, is provided a kind of based on the transmission of electricity for synchronizing vector
Whether line short impedance measurement device determines impedance relay by the Current Voltage vector analysis processing to synchro measure
Action analyzes judgement fault type and fault location to computing impedance.
In order to solve the above technical problems, the technical solution adopted by the present invention is：It is a kind of based on synchronize vector overhead power transmission
Line short impedance measurement device, wherein include three-phase impedance relay device, phase to phase impedance relay-set, three phase resistances
Reactance relay device, phase to phase impedance relay-set are electrically connected with current transformer and voltage transformer, current transformer and
Voltage transformer is electrically connected with synchronized phase measurement device, three-phase impedance relay device, phase to phase impedance relay-set and
One processing unit is connected, and realizes the measurement of all kinds of short-circuit voltages and electric current that overhead transmission line occurs.
In the present invention, the sampling synchronized to circuit both ends Current Voltage by synchronized phase measurement device avoids
Since protective relaying maloperation caused by data sampling asynchronous is made.Pass through three-phase impedance relay device, phase to phase impedance relay-set
All kinds of short troubles that overhead transmission line occurs differentiate, judge whether breaker acts.Three-phase impedance relay
Device, phase to phase impedance relay-set are connected with the first processing unit, and the first processing unit receives three-phase impedance relay dress
It sets, the electric signal of phase to phase impedance relay-set, the first processing unit calculates short dot position by short-circuit impedance.
In one embodiment, synchronized phase measurement device is equipped with clock module, second processing device.
Preferably, the first processing unit and second processing device are equipped with processor and display device.First processing unit
It is shown with second processing device by processor processes information and by display device by handling result.
Preferably, clock module is equipped with clock, external GPS, inside GPS, cable 1PPS, optical fiber 1PPS on plate, and
It is electrically connected with host CPU.
The effect of internal GPS is to ensure that equipment internal time is consistent.External GPS ensures GPS time and Coordinated Universal Time(UTC)
UTC can be synchronized to nanosecond order.Cable 1PPS, optical fiber 1PPS are for providing PUM and telemechanical communication port.Host CPU is based on
Calculate and handle the data of measurement.
In one embodiment, three-phase impedance relay device, phase to phase impedance relay-set are all made of multiphase formula width
Value circle characteristic impedance relay.
In one embodiment, current transformer model is LZZBJ9-10, voltage transformer model JDZX10-10/
3/0.1/ 3/0.1/3。
Preferably, three-phase impedance relay device, the single-phase, voltage between phases measured by phase to phase impedance relay-set and
Electric current is converted into electric signal transmission to host CPU.Host CPU receives three-phase impedance relay device, phase to phase impedance relay-set
After the electric signal of transmission, by the way that short dot position is calculated.
Preferably, three-phase impedance relay device, the single-phase, voltage between phases measured by phase to phase impedance relay-set and
Electric current is converted into electric signal transmission to the first processing unit.First processing unit receive electric signal after, by electric signal into
Row calculates, and realizes the judgement to fault point.
Preferably, the model Intel Xeon E5-2650 v4 of the first processing unit.
Compared with prior art, the present invention having the characteristics that：Three-phase impedance relay and phase to phase impedance relay are complete
All kinds of short troubles that pairs of overhead transmission line occurs are differentiated, and determine whether breaker acts；And it is synchronous to measurement
Amount device makes the sample-synchronous of circuit both ends Current Voltage carry out, and avoids since relay protection caused by data sampling asynchronous misses
Action.This device provides effective line fault method of discrimination, helpful to the accurate judgement of localization of fault and failure,
To improve the power supply reliability of power distribution network.
Description of the drawings
Fig. 1 is measuring device principle schematic in the embodiment of the present invention.
Fig. 2 is synchronized phase measurement module composition schematic diagram in the embodiment of the present invention.
Specific implementation mode
Attached drawing only for illustration, is not considered as limiting the invention；It is attached in order to more preferably illustrate the present embodiment
Scheme certain components to have omission, zoom in or out, does not represent the size of actual product；To those skilled in the art,
The omitting of some known structures and their instructions in the attached drawings are understandable.Being given for example only property of position relationship described in attached drawing
Illustrate, is not considered as limiting the invention.
Embodiment 1：
As shown in Figure 1, CT is current transformer, VT is voltage transformer, and PMU is synchronized phase measurement device.X is three phase of impedance
Relay, Y are phase to phase impedance relay.
The present invention provide it is a kind of based on synchronize vector overhead transmission line short-circuit impedance measuring device, include three phase resistances
Reactance relay device and phase to phase impedance relay-set, three-phase impedance relay device and phase to phase impedance relay-set respectively with
First processing unit is electrically connected, and is communicated with the first processing unit.
Three-phase impedance relay device is connected with current transformer and voltage transformer, and phase to phase impedance relay-set also connects
It is connected to current transformer and voltage transformer, current transformer and voltage transformer are connect with synchronized phase measurement device.
The synchronized sampling of current transformer and voltage transformer, synchronized phase measurement are controlled by synchronized phase measurement device
Device and current transformer and voltage transformer are fitted to overhead transmission line both sides, to overhead transmission line both sides
Voltage vector and current vector synchronize sampling.
Each phase current and voltage are converted into corresponding electric signal, and associated electrical signals focus on and are conveyed to three phase of impedance relays
Device device and phase to phase impedance relay-set judge that circuit is sent out by three-phase impedance relay device and phase to phase impedance relay-set
Which kind of type is raw failure belong to.Three-phase impedance relay device and phase to phase impedance relay-set are by electric signal transmission to first
Processing unit carries out short-circuit impedance calculating by the first processing unit, realizes the judgement to short dot position.
Three-phase impedance relay device, phase to phase impedance relay-set are all made of multiphase formula amplitude circle characteristic impedance relay
Device.
In the present embodiment, synchronized phase measurement device is equipped with clock module, second processing device.
First processing unit and second processing device are equipped with processor and display device, at the first processing unit and second
Reason device is shown by processor processes information and by display device by handling result.
As shown in Fig. 2, clock module is equipped with clock, external GPS, inside GPS, cable 1PPS, optical fiber 1PPS on plate, and
It is electrically connected with second processing device.The effect of internal GPS is to ensure that equipment internal time is consistent.When external GPS ensures GPS
Between with Coordinated Universal Time(UTC) UTC can be synchronized to nanosecond order.Cable 1PPS, optical fiber 1PPS are logical for providing PUM and telemechanical communication
Road.Second processing device is used to calculate and handle the data of measurement.
In the present embodiment, current transformer model is LZZBJ9-10, voltage transformer model JDZX10-10/ 3/0.1/ 3/0.1/3, the model Intel Xeon E5-2650 v4 of the first processing unit.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement etc., should be included in the claims in the present invention made by within the spirit and principle of invention
Protection domain within.
Claims (8)
1. a kind of based on the overhead transmission line short-circuit impedance measuring device for synchronizing vector, which is characterized in that include three phase resistances
Reactance relay device, phase to phase impedance relay-set, the three-phase impedance relay device, phase to phase impedance relay-set are electric
It is connected with current transformer and voltage transformer, the current transformer and voltage transformer are electrically connected with synchronized phase measurement dress
It sets, the three-phase impedance relay device, phase to phase impedance relay-set are connected with the first processing unit, realize to aerial defeated
The measurement of all kinds of short-circuit voltages and electric current that electric line occurs.
2. according to claim 1 based on the overhead transmission line short-circuit impedance measuring device for synchronizing vector, feature exists
In the synchronized phase measurement device is equipped with clock module, second processing device.
3. according to claim 2 based on the overhead transmission line short-circuit impedance measuring device for synchronizing vector, feature exists
In first processing unit and second processing device are equipped with processor and display device.
4. according to claim 2 based on the overhead transmission line short-circuit impedance measuring device for synchronizing vector, feature exists
It is equipped with clock, external GPS, inside GPS, cable 1PPS, optical fiber 1PPS on plate in, the clock module, and with described the
Two processing units are electrically connected.
5. according to claim 1 based on the overhead transmission line short-circuit impedance measuring device for synchronizing vector, feature exists
In the three-phase impedance relay device, phase to phase impedance relay-set are all made of multiphase formula amplitude circle characteristic impedance relay.
6. according to claim 1 based on the overhead transmission line short-circuit impedance measuring device for synchronizing vector, feature exists
In the current transformer model is LZZBJ9-10, voltage transformer model JDZX10-10/ 3/0.1/ 3/0.1/3。
7. it is according to any one of claims 1 to 6 based on synchronize vector overhead transmission line short-circuit impedance measuring device,
It is characterized in that, the single-phase, voltage between phases measured by three-phase impedance relay device, phase to phase impedance relay-set and electric current
Electric signal transmission is converted into the first processing unit.
8. according to any one of claims 1 to 6 measure dress based on the overhead transmission line short-circuit impedance for synchronizing vector
It sets, the model Intel Xeon E5-2650 v4 of first processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810542003.6A CN108427058A (en) | 2018-05-30 | 2018-05-30 | It is a kind of based on synchronize vector overhead transmission line short-circuit impedance measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810542003.6A CN108427058A (en) | 2018-05-30 | 2018-05-30 | It is a kind of based on synchronize vector overhead transmission line short-circuit impedance measuring device |
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| Publication Number | Publication Date |
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| CN108427058A true CN108427058A (en) | 2018-08-21 |
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| CN201810542003.6A Pending CN108427058A (en) | 2018-05-30 | 2018-05-30 | It is a kind of based on synchronize vector overhead transmission line short-circuit impedance measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082637A (en) * | 2019-05-10 | 2019-08-02 | 贵州电网有限责任公司 | A kind of power distribution network operation data monitoring system and method based on synchronous vector |
| CN110441649A (en) * | 2019-06-27 | 2019-11-12 | 国网福建省电力有限公司福州供电公司 | One kind is aerial-cable hybrid line fault fast positioning dress and localization method |
| RU2801348C1 (en) * | 2020-07-13 | 2023-08-07 | Омикрон Электроникс Гмбх | Method and device for determining the state of capacitive voltage converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082637A (en) * | 2019-05-10 | 2019-08-02 | 贵州电网有限责任公司 | A kind of power distribution network operation data monitoring system and method based on synchronous vector |
| CN110441649A (en) * | 2019-06-27 | 2019-11-12 | 国网福建省电力有限公司福州供电公司 | One kind is aerial-cable hybrid line fault fast positioning dress and localization method |
| RU2801348C1 (en) * | 2020-07-13 | 2023-08-07 | Омикрон Электроникс Гмбх | Method and device for determining the state of capacitive voltage converter |
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