CN114167178A - Electric signal measuring device for high-voltage overhead line - Google Patents
Electric signal measuring device for high-voltage overhead line Download PDFInfo
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- CN114167178A CN114167178A CN202111457698.6A CN202111457698A CN114167178A CN 114167178 A CN114167178 A CN 114167178A CN 202111457698 A CN202111457698 A CN 202111457698A CN 114167178 A CN114167178 A CN 114167178A
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- 238000005259 measurement Methods 0.000 claims abstract description 47
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- 238000004891 communication Methods 0.000 claims abstract description 8
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- 238000012545 processing Methods 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 9
- 230000005674 electromagnetic induction Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 11
- 239000002184 metal Substances 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
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- 238000013461 design Methods 0.000 description 1
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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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
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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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 invention discloses an electric signal measuring device for a high-voltage overhead line, which comprises a high-voltage overhead line penetrating equipotential shielding electrode, wherein one penetrating position equipotential shielding electrode is electrically connected with the high-voltage overhead line; a notch is cut on the side wall of the equipotential shielding electrode, a voltage measurement sensing electrode is connected to the notch in an insulating mode, a sampling resistor is arranged inside the equipotential shielding electrode, and the sampling resistor is electrically connected with the equipotential shielding electrode and the voltage measurement sensing electrode; the sampling resistor is electrically connected with the sampling resistor at two ends, and the signal acquisition unit is connected with external communication. The invention has simple integral structure, small occupied space and lower measurement cost, and can realize the simultaneous electromagnetic induction measurement of voltage and current signals at a plurality of positions of the high-voltage overhead line.
Description
Technical Field
The invention relates to the field of high-voltage overhead line electric parameter measuring devices, in particular to an electric signal measuring device for a high-voltage overhead line.
Background
Current and voltage are two important parameters in the grid that can be used to characterize the operating state of the grid. The accurate measurement of current and voltage has important significance in the fields of parameter evaluation, fault location, relay protection and the like of a transmission line, and has very important effect on the safe and stable operation of a power grid. With the development of smart grids and the continuous improvement of voltage levels of power systems, the requirements of the power systems on current and voltage measurement are gradually increased.
Currently, in the power grid of 220kV and above, the most common voltage measuring device is a capacitive voltage-dividing type voltage transformer. Traditional electric capacity voltage division formula voltage transformer structure is complicated, for example voltage level 220 kV's electric capacity voltage division formula voltage transformer, needs hundreds of capacitors to establish ties and constitutes high-voltage arm electric capacity, and this leads to the shared space of traditional electric capacity voltage division formula voltage transformer great, and the structure is comparatively complicated, and measurement cost is higher, can't realize large-scale installation and use in the electric wire netting. However, the electromagnetic voltage transformer has a problem of nonlinearity of output voltage due to magnetic saturation when the voltage level is high, and thus, the electromagnetic voltage transformer is difficult to be used for measuring high voltage.
Disclosure of Invention
The invention aims to provide an electric signal measuring device for a high-voltage overhead line, and aims to solve the problems that a capacitive voltage-dividing type voltage transformer for measuring the voltage of the high-voltage overhead line in the prior art is complex in structure and high in cost.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an electric signal measuring device for a high-voltage overhead line comprises an equipotential shielding electrode with a hollow interior, wherein the equipotential shielding electrode penetrates through the high-voltage overhead line, the equipotential shielding electrode and the high-voltage overhead line are in insulation connection at one penetrating position, and the equipotential shielding electrode and the high-voltage overhead line are in electric connection at the other penetrating position; a notch is hollowed and cut in the side wall of the equipotential shielding electrode, a voltage measurement sensing electrode is arranged at the notch, and the voltage measurement sensing electrode is electrically insulated from the equipotential shielding electrode; a sampling resistor is arranged in the equipotential shielding electrode, one end of the sampling resistor is electrically connected with the equipotential shielding electrode, and the other end of the sampling resistor is electrically connected with the voltage measurement sensing electrode; the voltage sampling device is characterized by further comprising a signal acquisition unit, wherein the signal input end of the signal acquisition unit is electrically connected with the two ends of the sampling resistor, the signal acquisition unit acquires the voltage on the sampling resistor, and the signal acquisition unit transmits and acquires the voltage parameters of the sampling resistor.
Furthermore, the positions of the equipotential shielding electrodes corresponding to the two penetrating positions are respectively connected with grading rings, and the grading rings are respectively annularly sleeved on the high-voltage overhead line.
Furthermore, an electricity taking coil is further arranged inside the equipotential shielding electrode, the electricity taking coil is sleeved on the high-voltage overhead line, the electricity taking coil is electrically insulated from the equipotential shielding electrode, and two ends of the electricity taking coil are electrically connected with a power input end of the signal acquisition power supply respectively.
Furthermore, an electronic current transformer is further arranged in the equipotential shielding electrode, the electronic current transformer is annularly sleeved on the high-voltage overhead line, and the electronic current transformer is electrically insulated from the equipotential shielding electrode; the signal acquisition unit is also provided with a signal input end which is electrically connected with two ends of the electronic current transformer, the signal acquisition unit acquires the current on the electronic current transformer and transmits the acquired current parameters of the electronic current transformer to the outside.
Furthermore, the signal acquisition unit is arranged inside the equipotential shielding electrode and transmits the acquired electrical signal parameters outwards in a wired or wireless mode.
The data processing device is in communication connection with the signal acquisition unit and receives the voltage parameter of the sampling resistor transmitted by the signal acquisition unit;
and the data processing device calculates the voltage of the high-voltage overhead line based on the voltage parameter of the sampling resistor, the resistance value of the sampling resistor, the insulation capacitance between the voltage measurement sensing electrode and the equipotential shielding electrode and the stray capacitance of the voltage measurement sensing electrode to the ground.
Further, the data processing device calculates the current of the high-voltage overhead line based on the current parameter of the electronic current transformer.
In the invention, a sampling resistor is integrated in the equipotential shielding electrode for generating a voltage signal, the high-voltage overhead line and the equipotential shielding electrode are equipotential, current flows into the voltage measurement sensing electrode from the equipotential shielding electrode through the sampling resistor and an insulating film between the voltage measurement sensing electrode and the equipotential shielding electrode, so that a voltage signal is generated on the sampling resistor, and a signal acquisition unit acquires the voltage signal on the sampling resistor. When voltage measurement is carried out, stray capacitance between the voltage measurement sensing electrode and the ground can be used as a high-voltage arm capacitor, hundreds of capacitors are not needed to be connected in series, and the voltage of the high-voltage overhead line can be calculated by combining voltage parameters of the sampling resistor, the resistance value of the sampling resistor and the insulation capacitance between the voltage measurement sensing electrode and the equipotential shielding electrode through the stray capacitance. Therefore, compared with the traditional capacitance voltage division type voltage transformer, the invention has the advantages of simple structure, low measurement cost and the like.
In the invention, the current commonly used current measuring equipment, namely the electronic current transformer, is integrated in the equipotential shielding electrode, the electronic current transformer has small volume, light weight and better economy, and can be combined into a circuit breaker or other high-voltage equipment to reduce the occupied area. The current of the high-voltage overhead line can be calculated through the current parameters generated by the electronic current transformer.
In the invention, the equipotential shielding electrode and the high-voltage overhead line have the same potential, the voltage measurement sensing electrode is directly manufactured on the equipotential shielding electrode, and the sensitivity to the high-voltage overhead line is higher, so that the voltage measurement sensing electrode can be very small, the influence of conductors near the whole measurement device including conductors of adjacent phases on a measurement system is small, the measurement device has stronger external interference resistance, the independent measurement of the voltage of the high-voltage overhead line of any phase can be realized, and the voltage measurement device is also suitable for the voltage measurement of the three-phase high-voltage overhead line.
In the invention, the induced voltage at two ends of the measuring resistor is low and is generally only 3-5V, and the induced voltage can be directly transmitted to a subsequent digital circuit without processing an induced voltage signal through an attenuation circuit.
Therefore, the invention has simple integral structure, small occupied space and lower measurement cost, is convenient to realize large-scale installation and use, can realize simultaneous measurement of voltage and current signals of a plurality of positions of the high-voltage overhead line, provides more information for the fields of parameter estimation, fault location, relay protection and the like of a transmission line, and has important significance for the safe and stable operation of a measurement system.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is an equivalent circuit diagram of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1, the present embodiment includes an equipotential shielding electrode 1 that is horizontal left and right in the axial direction, the equipotential shielding electrode 1 is hollow, the left and right ends of the axis are end walls, the centers of the end walls at the left and right ends of the equipotential shielding electrode are respectively provided with an opening, and an overhead line 4 coaxially penetrates through the equipotential shielding electrode 1 through the opening in the left and right directions.
The left end and the right end of the equipotential shielding electrode 1 are respectively provided with a metal connector 3, each metal connector 3 is electrically connected with a grading ring 2 in a ring sleeve mode, each metal connector 3 is fixed on a high-voltage overhead line 4 in a corresponding position in a ring sleeve mode, and the metal connectors 3 are in electrical connection contact with the high-voltage overhead lines 4. The left end part of the right metal connector 3 is directly electrically connected into the opening of the right end wall of the equipotential shielding electrode 1, and the equipotential shielding electrode 1 and the high-voltage overhead line 4 are electrically connected through the right metal connector 3; the right end part of the left metal connector 3 is connected in the opening of the left end wall of the equipotential shielding electrode 1 in an insulating way through an insulating layer 14, and the left metal connector 3 is electrically insulated from the equipotential shielding electrode 1 through the insulating layer 14, so that the current of the high-voltage overhead line 4 is inhibited from flowing to the equipotential shielding electrode 1 from the left metal connector. The grading ring 2 acts to homogenize the electric field and prevent discharges caused by the introduction of the measuring device according to the invention.
The electronic current transformer 5 is arranged in the equipotential shielding electrode 1, the electronic current transformer 5 is connected to the inner wall of the equipotential shielding electrode 1 through the basin-type insulator 6, and is supported and fixed by the basin-type insulator 6, and the electronic current transformer 5 is electrically insulated from the equipotential shielding electrode 1. The electronic current transformer 5 is sleeved outside the high-voltage overhead line 4 inside the equipotential shielding electrode 1, and the electronic current transformer 5 senses the current flowing through the high-voltage overhead line 4, so that a corresponding induced current signal is generated in the electronic current transformer 5.
The lower side wall of the equipotential shielding electrode 1 is hollowed to form a cut, and the cut penetrates through the lower side wall of the equipotential shielding electrode 1. A voltage measurement sensing electrode 12 is arranged in the notch, the circumferential side wall of the voltage measurement sensing electrode 12 is connected with an insulating film 11, the voltage measurement sensing electrode 12 is connected with the inner wall of the notch through the insulating film 11, and the insulating film 11 is used for realizing the electrical insulation between the voltage measurement sensing electrode 12 and the equipotential shielding electrode 1.
The inside of equipotential shielding electrode 1 is provided with sampling resistor 10, and sampling resistor 10 one end is connected to voltage measurement sensing electrode 12, and the other end electricity of sampling resistor 10 is connected to equipotential shielding electrode 1. Equipotential shielding electrode 1 and high-voltage overhead line 4 equipotential, the electric current flows into voltage measurement sensing electrode 12 through sampling resistor 10 and insulating film 11 between voltage measurement sensing electrode 12 and equipotential shielding electrode 1 by equipotential shielding electrode 1 to by voltage measurement sensing electrode 12 through the stray capacitance flow direction ground between voltage measurement sensing electrode 12 and the ground, produce voltage on this in-process sampling resistor 10 again.
The equipotential shielding electrode 1 is internally provided with a signal acquisition unit 8, and the signal acquisition unit 8 is a voltage and current acquisition chip. The signal acquisition unit 8 is connected with two ends of the electronic current transformer 5 through current leads 7 corresponding to the signal input end of the current acquisition chip, and the signal acquisition unit 8 acquires a current signal generated by the electronic current transformer 5; the signal acquisition unit 8 is corresponding to the signal input end of the voltage acquisition chip and is respectively connected with two ends of the sampling resistor 10 through the voltage lead 9, and the signal acquisition unit 8 acquires the voltage signal generated by the sampling resistor 10. Thus, the signal acquisition unit 8 acquires and acquires a current signal generated by the electronic current transformer 5 and a voltage signal generated by the sampling resistor 10. Meanwhile, the signal acquisition unit 8 is integrated with a wireless communication module, an antenna 13 connected with the wireless communication module penetrates out of the equipotential shielding electrode 1, and the signal acquisition unit 8 transmits acquired electric signals outwards in a wireless mode through the wireless communication module.
The inside of the equipotential shielding electrode 1 is provided with a CT electricity taking coil 15, and the CT electricity taking coil 15 is fixedly connected with the inner wall of the equipotential shielding electrode 1 through another basin-type insulator, so that electrical insulation is formed between the CT electricity taking coil 15 and the equipotential shielding electrode 1. And the CT electricity-taking coil 15 is coaxially sleeved outside the high-voltage overhead line 4 inside the equipotential shielding electrode 1, so that the CT electricity-taking coil 15 can sense the current of the high-voltage overhead line 4 to generate a sensing current. Two ends of the CT electricity taking coil 15 are electrically connected with a power input end of the signal acquisition unit 8 through an energy taking lead 16 respectively, and the CT electricity taking coil 15 supplies power to the signal acquisition unit 8. Therefore, the invention does not need to arrange a power supply aiming at the electric parts of the equipotential shielding electrode 1, but directly gets electricity from the high-voltage overhead line.
A data processing device 18 composed of a computer is arranged outside the equipotential shielding electrode 1, the data processing device 18 is in communication connection with a signal acquisition unit inside the equipotential shielding electrode 1 through a wireless communication module 17 of the data processing device, and the data processing device 18 receives a current signal generated by the electronic current transformer 5 and a voltage signal generated by the sampling resistor 10, which are transmitted by the signal acquisition unit. The data processing device 18 calculates the current of the high-voltage overhead line 4 based on the current signal generated by the electronic current transformer 5, and the calculation process is the same as the process of calculating the target current based on the current sensed by the current transformer in the prior art, and is not described herein again.
The data processing device 18 further calculates the voltage of the high-voltage overhead line based on the voltage parameter of the sampling resistor, the resistance value of the sampling resistor, the insulation capacitance between the voltage measurement sensing electrode and the equipotential shielding electrode, and the stray capacitance of the voltage measurement sensing electrode to the ground. As shown in fig. 2, which is an equivalent circuit diagram of the present invention, the voltage calculation process of the high voltage overhead line is as follows:
according to maxwell's equations and ampere-loop theorem, equation (1) can be obtained:
wherein,
is a potential displacement vector;
is the conduction current density; t is time, S is the closed surface through which the conduction current and the displacement current flow, and the reference direction thereof is the outer normal direction.
Taking each surface of the voltage measurement sensing electrode 12 as a closed surface, the algebraic sum of the displacement current and the conduction current flowing into and out of the closed surface is 0 according to formula (1). The conduction current flows from the equipotential shield electrode 1 through the sampling resistor 10 into the closed surface. Thus, the two terms on the left side of equation (1) can be written as equation (2) and equation (3):
wherein R is the resistance value of the sampling resistor 10; u. ofRThe voltage across the sampling resistor 10; i.e. idIs the algebraic sum of the displacement currents flowing into and out of the closed surface (i.e. the closed surface formed by the surfaces of the voltage-measuring sensing electrode 12), the displacement currents passing through the insulation gap (i.e. the insulation gap) between the voltage-measuring sensing electrode 12 and the equipotential shielding electrode 1 by the equipotential shielding electrode 1The edge film 11) of the capacitor C1Flowing into the closed face; the displacement current is measured by the voltage measuring sensing electrode 12 and the stray capacitance C between the voltage measuring sensing electrode 12 and the ground2And flows out of the closing surface. Thus, with the direction of current flow out of the closed face as the reference direction, equation (1) can be written as equation (4):
wherein u isSIs the voltage of the high voltage overhead line 4.
In FIG. 2, C1Is the insulation gap capacitance between the voltage measurement sensing electrode 12 and the equipotential shielding electrode 1; c2Is the stray capacitance between the voltage measuring sensing electrode 12 and ground; r is the impedance of the sampling resistor 10.
As can be seen from fig. 2, in the frequency domain, the relationship between the induced voltage across the sampling resistor 10 and the voltage of the high-voltage overhead line 4 is as follows:
in practical application, the voltage of the high-voltage overhead line 4 can be obtained according to the induced voltage at the two ends of the sampling resistor 10 collected by the signal collecting unit 8 and a formula (5).
The embodiments of the present invention are described only for the preferred embodiments of the present invention, and not for the limitation of the concept and scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall into the protection scope of the present invention, and the technical content of the present invention which is claimed is fully set forth in the claims.
Claims (7)
1. An electrical signal measuring device for a high voltage overhead line, characterized in that: the equipotential shielding electrode is penetrated by a high-voltage overhead line, the equipotential shielding electrode and the high-voltage overhead line are in insulation connection at one penetrating position, and the equipotential shielding electrode and the high-voltage overhead line are in electric connection at the other penetrating position; a notch is hollowed and cut in the side wall of the equipotential shielding electrode, a voltage measurement sensing electrode is arranged at the notch, and the voltage measurement sensing electrode is electrically insulated from the equipotential shielding electrode; a sampling resistor is arranged in the equipotential shielding electrode, one end of the sampling resistor is electrically connected with the equipotential shielding electrode, and the other end of the sampling resistor is electrically connected with the voltage measurement sensing electrode; the voltage sampling device is characterized by further comprising a signal acquisition unit, wherein the signal input end of the signal acquisition unit is electrically connected with the two ends of the sampling resistor, the signal acquisition unit acquires the voltage on the sampling resistor, and the signal acquisition unit transmits and acquires the voltage parameters of the sampling resistor.
2. An electrical signal measuring device for a high voltage overhead line according to claim 1, characterized in that: the positions of the equipotential shielding electrodes corresponding to the two penetrating positions are respectively connected with equalizing rings, and the equalizing rings are respectively annularly sleeved on the high-voltage overhead line.
3. An electrical signal measuring device for a high voltage overhead line according to claim 1, characterized in that: the equipotential shielding electrode is characterized in that a power taking coil is further arranged inside the equipotential shielding electrode, the power taking coil is mounted on the high-voltage overhead line in a ring sleeve mode, the power taking coil is electrically insulated from the equipotential shielding electrode, and two ends of the power taking coil are electrically connected with a power input end of a signal acquisition power supply respectively.
4. An electrical signal measuring device for a high voltage overhead line according to claim 1, characterized in that: an electronic current transformer is further arranged in the equipotential shielding electrode, the electronic current transformer is sleeved on the high-voltage overhead line, and the electronic current transformer is electrically insulated from the equipotential shielding electrode; the signal acquisition unit is also provided with a signal input end which is electrically connected with two ends of the electronic current transformer, the signal acquisition unit acquires the current on the electronic current transformer and transmits the acquired current parameters of the electronic current transformer to the outside.
5. An electrical signal measuring device for a high voltage overhead line according to claim 1 or 4, characterized in that: the signal acquisition unit is arranged in the equipotential shielding electrode and transmits acquired electric signal parameters outwards in a wired or wireless mode.
6. An electrical signal measuring device for a high voltage overhead line according to claim 1, characterized in that: the data processing device is in communication connection with the signal acquisition unit and receives the voltage parameter of the sampling resistor transmitted by the signal acquisition unit;
and the data processing device calculates the voltage of the high-voltage overhead line based on the voltage parameter of the sampling resistor, the resistance value of the sampling resistor, the insulation capacitance between the voltage measurement sensing electrode and the equipotential shielding electrode and the stray capacitance of the voltage measurement sensing electrode to the ground.
7. An electrical signal measuring device for a high voltage overhead line according to claim 4 or 6, characterized in that: and the data processing device calculates the current of the high-voltage overhead line based on the current parameters of the electronic current transformer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111457698.6A CN114167178A (en) | 2021-12-02 | 2021-12-02 | Electric signal measuring device for high-voltage overhead line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111457698.6A CN114167178A (en) | 2021-12-02 | 2021-12-02 | Electric signal measuring device for high-voltage overhead line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114878894A (en) * | 2022-05-13 | 2022-08-09 | 华北电力大学 | Multiphase overhead line power frequency voltage measuring device capable of restraining influence of adjacent phases |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0806675A1 (en) * | 1996-05-07 | 1997-11-12 | Schneider Electric Sa | Electrooptical current sensor with an optical fibre |
| CN2788323Y (en) * | 2005-04-14 | 2006-06-14 | 谢东阳 | Digital high-voltage combined mutual inductor |
| CN202693699U (en) * | 2012-06-14 | 2013-01-23 | 深圳市中科集创电力科技有限公司 | On-line detection device of overhead line and current transformer (CT) electricity-taking power unit |
| CN103884947A (en) * | 2014-04-10 | 2014-06-25 | 珠海国测电能仪表科技有限公司 | Electric energy metering device and method of high-voltage aerial cables |
| CN112946343A (en) * | 2021-01-29 | 2021-06-11 | 华北电力大学 | Overhead line power frequency voltage measuring device and measuring method |
-
2021
- 2021-12-02 CN CN202111457698.6A patent/CN114167178A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0806675A1 (en) * | 1996-05-07 | 1997-11-12 | Schneider Electric Sa | Electrooptical current sensor with an optical fibre |
| CN2788323Y (en) * | 2005-04-14 | 2006-06-14 | 谢东阳 | Digital high-voltage combined mutual inductor |
| CN202693699U (en) * | 2012-06-14 | 2013-01-23 | 深圳市中科集创电力科技有限公司 | On-line detection device of overhead line and current transformer (CT) electricity-taking power unit |
| CN103884947A (en) * | 2014-04-10 | 2014-06-25 | 珠海国测电能仪表科技有限公司 | Electric energy metering device and method of high-voltage aerial cables |
| CN112946343A (en) * | 2021-01-29 | 2021-06-11 | 华北电力大学 | Overhead line power frequency voltage measuring device and measuring method |
Non-Patent Citations (1)
| Title |
|---|
| 电工仪器仪表检定与修理编写组: "《电工仪器仪表检定与修理（下册）》", 30 September 1983, 国防工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114878894A (en) * | 2022-05-13 | 2022-08-09 | 华北电力大学 | Multiphase overhead line power frequency voltage measuring device capable of restraining influence of adjacent phases |
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