CN208860909U - A kind of overhead transmission line short-circuit impedance measuring device based on synchronous vector - Google Patents
A kind of overhead transmission line short-circuit impedance measuring device based on synchronous vector Download PDFInfo
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- CN208860909U CN208860909U CN201820822555.8U CN201820822555U CN208860909U CN 208860909 U CN208860909 U CN 208860909U CN 201820822555 U CN201820822555 U CN 201820822555U CN 208860909 U CN208860909 U CN 208860909U
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- overhead transmission
- impedance
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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
- Y04S10/50—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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Abstract
The utility model relates to a kind of power system measuring devices, its measurement for being mainly used for all kinds of short-circuit impedances of overhead transmission line in electric system, it include three-phase impedance relay device, interphase impedance relay-set, three-phase impedance relay device, interphase 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, interphase 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, it is handled by the Current Voltage vector analysis to synchro measure, determine whether impedance relay acts, computing impedance is analyzed and determines fault type and fault location.
Description
Technical field
The utility model relates to a kind of power system measuring devices, and it is each to be mainly used for overhead transmission line in electric system
The measurement of class short-circuit impedance.
Background technique
With the continuous development of smart grid, power distribution network operation scale is continued 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 that short circuit occurs in transmission line of electricity can be divided into following several: single-phase
Shorted to earth, two relative ground circuits, phase fault and three-phase shortcircuit.The system (secondary network) of isolated neutral 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, system can be excluded by automatic reclosing for temporary short trouble, and it is some 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 bus both ends is particularly important, as 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.
Utility model content
The utility model in order to overcome at least one of the drawbacks of the prior art described above, provides a kind of based on synchronous vector
Transmission line of electricity short-circuit impedance measuring device is handled by the Current Voltage vector analysis to synchro measure, determines impedance relay
Whether act, computing impedance is analyzed and determines fault type and fault location.
In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of based on the aerial of synchronous vector
Transmission line of electricity short-circuit impedance measuring device, wherein it include three-phase impedance relay device, interphase impedance relay-set, three
Phase of impedance relay-set, interphase impedance relay-set are electrically connected with current transformer and voltage transformer, Current Mutual Inductance
Device and voltage transformer are electrically connected with synchronized phase measurement device, three-phase impedance relay device, interphase impedance relay-set
It is connected with the first processing unit, realizes the measurement of all kinds of short-circuit voltages and electric current that overhead transmission line occurs.
In the utility model, the sampling synchronized by synchronized phase measurement device to route both ends Current Voltage is kept away
The work of the protective relaying maloperation as caused by data sampling asynchronous is exempted from.Pass through three-phase impedance relay device, interphase impedance relay
Device differentiates all kinds of short troubles that overhead transmission line occurs, and judges whether breaker acts.Three phase of impedance after
Electrical installation, interphase impedance relay-set are connected with the first processing unit, and the first processing unit receives three phase of impedance relays
The electric signal of device device, interphase impedance relay-set, the first processing unit calculate 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
Processing result is shown with second processing device by processor processes information and by display device.
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 channel.Host CPU is based on
Calculate and handle the data of measurement.
In one embodiment, three-phase impedance relay device, interphase impedance relay-set are all made of multiphase formula width
It is worth circle characteristic impedance relay.
In one embodiment, current transformer model is LZZBJ9-10.
Preferably, three-phase impedance relay device, single-phase, voltage between phases measured by interphase impedance relay-set and
Electric current is converted into electric signal transmission to host CPU.Host CPU receives three-phase impedance relay device, interphase impedance relay-set
After the electric signal of transmission, by the way that short dot position is calculated.
Preferably, three-phase impedance relay device, single-phase, voltage between phases measured by interphase 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.
The utility model compared with prior art, has the following characteristics that three-phase impedance relay and interphase impedance relay
Device completion differentiates all kinds of short troubles that overhead transmission line occurs, and determines whether breaker acts；And it is synchronous to
Measuring device carries out the sample-synchronous of route both ends Current Voltage, avoids the guarantor of the relay as caused by data sampling asynchronous
Shield malfunction.This device provides effective line fault method of discrimination, has to the accurate judgement of localization of fault and failure
It helps, to improve the power supply reliability of power distribution network.
Detailed description of the invention
Fig. 1 is measuring device schematic illustration in the utility model embodiment.
Fig. 2 is synchronized phase measurement module composition schematic diagram in the utility model embodiment.
Specific embodiment
Attached drawing only for illustration, should not be understood as limiting the present invention；In order to more preferably illustrate this implementation
Example, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；For those skilled in the art
For, the omitting of some known structures and their instructions in the attached drawings are understandable.Positional relationship is described in attached drawing to be only used for
Exemplary illustration should not be understood as limiting the present 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
Impedance relay, Y are interphase impedance relay.
The utility model provides a kind of overhead transmission line short-circuit impedance measuring device based on synchronous vector, includes three
Phase of impedance relay-set and interphase impedance relay-set, three-phase impedance relay device and interphase impedance relay-set point
It is not electrically connected with the first processing unit, is communicated with the first processing unit.
Three-phase impedance relay device is connected with current transformer and voltage transformer, and interphase 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 two sides, to overhead transmission line two 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 interphase impedance relay-set judge that route is sent out by three-phase impedance relay device and interphase impedance relay-set
Which kind of type is raw failure belong to.Three-phase impedance relay device and interphase 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, interphase 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 shows processing result by processor processes information and by display device.
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, the model Intel Xeon of the first processing unit
E5-2650 v4。
Obviously, the above embodiments of the present invention is merely examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (8)
1. a kind of overhead transmission line short-circuit impedance measuring device based on synchronous vector, which is characterized in that include three phase resistances
Reactance relay device, interphase impedance relay-set, the three-phase impedance relay device, interphase 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, interphase impedance relay-set are connected with the first processing unit, realize defeated to making somebody a mere figurehead
The measurement of all kinds of short-circuit voltages and electric current that electric line occurs.
2. the overhead transmission line short-circuit impedance measuring device according to claim 1 based on synchronous vector, feature exist
In the synchronized phase measurement device is equipped with clock module, second processing device.
3. the overhead transmission line short-circuit impedance measuring device according to claim 2 based on synchronous vector, feature exist
In first processing unit and second processing device are equipped with processor and display device.
4. the overhead transmission line short-circuit impedance measuring device according to claim 2 based on synchronous vector, feature exist
Clock, external GPS, inside GPS, cable 1PPS, optical fiber 1PPS on plate are equipped in, the clock module, and with described the
The electrical connection of two processing units.
5. the overhead transmission line short-circuit impedance measuring device according to claim 1 based on synchronous vector, feature exist
In the three-phase impedance relay device, interphase impedance relay-set are all made of multiphase formula amplitude circle characteristic impedance relay.
6. the overhead transmission line short-circuit impedance measuring device according to claim 1 based on synchronous vector, feature exist
In the current transformer model is LZZBJ9-10, voltage transformer model JDZX10-10.
7. the overhead transmission line short-circuit impedance measuring device according to any one of claims 1 to 6 based on synchronous vector,
It is characterized in that, single-phase, voltage between phases and electric current measured by three-phase impedance relay device, interphase impedance relay-set
Electric signal transmission is converted into the first processing unit.
8. the overhead transmission line short-circuit impedance measuring device according to any one of claims 1 to 6 based on synchronous vector,
It is characterized in that, the model Intel Xeon E5-2650 v4 of first processing unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820822555.8U CN208860909U (en) | 2018-05-30 | 2018-05-30 | A kind of overhead transmission line short-circuit impedance measuring device based on synchronous vector |
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| CN201820822555.8U CN208860909U (en) | 2018-05-30 | 2018-05-30 | A kind of overhead transmission line short-circuit impedance measuring device based on synchronous vector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427058A (en) * | 2018-05-30 | 2018-08-21 | 广东电网有限责任公司 | It is a kind of based on synchronize vector overhead transmission line short-circuit impedance measuring device |
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2018
- 2018-05-30 CN CN201820822555.8U patent/CN208860909U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427058A (en) * | 2018-05-30 | 2018-08-21 | 广东电网有限责任公司 | It is a kind of based on synchronize vector overhead transmission line short-circuit impedance measuring device |
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