CN117471149A - Voltage measurement system of suspended potential conductor below overhead transmission line - Google Patents
Voltage measurement system of suspended potential conductor below overhead transmission line Download PDFInfo
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- 239000003990 capacitor Substances 0.000 claims abstract description 48
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000004891 communication Methods 0.000 claims description 16
- 238000005339 levitation Methods 0.000 claims 1
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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
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
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Abstract
The invention discloses a voltage measurement system of a suspended potential conductor below an overhead transmission line, which comprises an insulating support frame, an insulating support body, an insulating cradle head, a metal inductor and a detection capacitor C 1 Wherein, the bottom of insulating support frame sets up in the bottom surface, and the bottom is provided with insulating cloud platform, and insulating support body sets up at insulating cloud platform for support metal inductor, metal inductor pass through wire and detection capacitor C 1 Is connected with the first end of the detection capacitor C 1 Is grounded to the second end of the capacitor C 1 A voltage detector is arranged at two ends of the capacitor C for detecting and outputting the induction charges of the metal inductor 1 Voltage test formed across (a)Values. By using a detection capacitor C 1 Connect the metal inductor, and carry on the insulating support to the metal inductor through insulating support frame, insulating support body, insulating cradle head, can make the metal inductor transmit the charge induced to the detection capacitor C 1 The detection device does not disappear due to the extension of time, and the detection accuracy and reliability are improved.
Description
Technical Field
The invention relates to the technical field of high-voltage transmission, in particular to a voltage measurement system of a suspended potential conductor below an overhead transmission line.
Background
When the high-voltage transmission line transmits electric energy, electromagnetic phenomena can be generated around the transmission line. Because of the relation between the electric field and the potential, a potential field is generated around the circuit, and accurate detection is needed, so that the surrounding safety distance is determined, and the power transmission equipment is accurately designed.
There are no devices and instruments for directly measuring the electric potential of a point below the transmission line in a near-ground area. Because the potential at a certain point cannot yet be measured directly by the driving device. The existing measurement of the induced voltage is mainly focused on the measurement of the induced potential of a metal structure object below the power transmission line and the measurement of the induced potential of an overhaul line around the power transmission line, and basically does not relate to the direct measurement of the potential at a certain point in the space below the power transmission line.
The induction potential of a certain point in the space below the transmission line is measured, and the potential of the certain point cannot be directly measured.
Disclosure of Invention
The invention aims to provide a voltage measurement system for a suspended potential conductor below an overhead transmission line, which is used for measuring the induction potential of a certain point in a space below the transmission line and improving the detection accuracy.
In order to solve the technical problems, the embodiment of the invention provides a voltage measurement system of a suspended potential conductor below an overhead transmission line, which comprises an insulating support frame, an insulating support body, an insulating cradle head, a metal inductor and a detection capacitor C 1 Wherein, the bottom of insulating support frame sets up in the bottom surface, and the bottom is provided with insulating cloud platform, the insulating support body sets up insulating cloud platform is used for supporting the metal inductor, the metal inductor pass through the wire with detect electric capacity C 1 Is the first of (2)One end is connected with the detection capacitor C 1 Is grounded to the second end of the detection capacitor C 1 A voltage detector is arranged at two ends of the capacitor C for detecting and outputting the induced charges of the metal inductor 1 Voltage test values formed across the two terminals of (a).
The detection capacitor also comprises a capacitive voltage divider arranged between the lead and the detection capacitor, wherein the capacitive voltage divider is connected with the detection capacitor in series, and the capacitance of the capacitive voltage divider is 2-3 PF.
The display unit is connected with the voltage detector and is used for displaying the voltage test value.
The wireless communication module is connected with the voltage detector and comprises at least one of a 5G communication module, a 4G communication module, an infrared communication module and a wifi module.
The metal inductor is characterized by further comprising an aviation connector circumferentially connected with the metal inductor and used for receiving and then conducting charges generated by the metal inductor to the lead.
Wherein, the insulating support frame is wood support frame or plastic support frame.
The insulation support frame is a height-adjustable insulation support frame, and the height adjustment range of the height-adjustable insulation support frame is 95-115cm.
Wherein, the metal inductor is a metal disc, a metal sphere or a metal round bar.
Wherein the metal inductor is a metal sphere, and the diameter of the metal sphere is 0.05m-0.2m.
The insulation support body is an insulation support screw rod, and the adjustment range of the insulation support screw rod is 0-50cm.
Compared with the prior art, the voltage measurement system of the suspended potential conductor below the overhead transmission line provided by the embodiment of the invention has the following advantages:
the voltage measurement system of the suspended potential conductor below the overhead transmission line is characterized by adopting a detection capacitor C 1 Connecting metal inductor and supporting through insulationThe frame, the insulating support body and the insulating cradle head carry out insulating support on the metal inductor, so that the metal inductor can transmit the induced charge to the detection capacitor C 1 The detection device does not disappear due to the extension of time, and the detection accuracy and reliability are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a specific implementation of a voltage measurement system for a suspended potential conductor under an overhead transmission line according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a specific implementation manner of a voltage measurement system of a suspended potential conductor under an overhead transmission line according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a capacitance value relative error calculated by a capacitance value of a metal conductor ball to ground relative to an analytical method in a voltage measurement system of a suspended potential conductor below an overhead transmission line according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a conductor ball simulation result versus a calculation result relative error structure of a voltage measurement system of a suspended potential conductor below an overhead transmission line according to an embodiment of the present invention;
the device comprises a 1-metal inductor, a 2-aviation connector, a 3-insulating support, a 4-insulating cradle head, a 5-insulating support frame, a 6-wire, a 7-capacitance voltage divider, an 8-voltage detector and a 9-detection capacitor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to fig. 4, fig. 1 is a schematic structural diagram of a specific implementation manner of a voltage measurement system for a suspended potential conductor below an overhead transmission line according to an embodiment of the present invention; fig. 2 is a schematic circuit diagram of a specific implementation manner of a voltage measurement system of a suspended potential conductor under an overhead transmission line according to an embodiment of the present invention; fig. 3 is a schematic diagram of a capacitance value relative error calculated by a capacitance value of a metal conductor ball to ground relative to an analytical method in a voltage measurement system of a suspended potential conductor below an overhead transmission line according to an embodiment of the present invention; fig. 4 is a schematic diagram of a conductor ball simulation result versus a calculation result relative error structure of a voltage measurement system of a suspended potential conductor under an overhead transmission line according to an embodiment of the present invention.
In a specific embodiment, the voltage measurement system of the suspended potential conductor below the overhead transmission line comprises an insulation support 5, an insulation support 3, an insulation cradle head 4, a metal inductor 1 and a detection capacitor 9C 1 Wherein, the bottom of insulating support frame 5 sets up in the bottom surface, and the bottom is provided with insulating cloud platform 4, insulating support body 3 sets up insulating cloud platform 4 is used for supporting metal inductor 1, metal inductor 1 pass through wire 6 with detect electric capacity 9C 1 Is connected to the first end of the detection capacitor 9C 1 Is grounded at the second end of the capacitor C 1 A voltage detector 8 is arranged at both ends of the metal inductor 1 for detecting and outputting the induced charges and then forming a detection capacitor 9C 1 Voltage test values formed across the two terminals of (a).
By using a detection capacitor 9C 1 Connect the metal inductor 1, and carry out insulation support to the metal inductor 1 through insulation support 5, insulation support 3, insulation cradle head 4, can make the metal inductor 1 transmit the electric charge of induction to the detection capacitor 9C 1 Not due to the extension of timeVanishing, the accuracy and the reliability of detection are improved.
Due to direct detection of the detection capacitor 9C 1 Possibly with a very large value, and thus needs to be converted into a safe and reliable test range, in one embodiment the voltage measuring system of the floating potential conductor under the overhead transmission line further comprises a measuring capacitor 9C arranged between the conductor 6 and the detecting capacitor 1 The capacitive voltage divider 7 is connected in series with the detection capacitor 9, and the capacitance of the capacitive voltage divider 7 is 2-3 PF.
In the present application, the conducting wire 6 and the detection capacitor 9C are used for conducting 1 A capacitive voltage divider 7 is arranged between the two capacitors, and a detection capacitor 9C is originally detected 1 The voltage of the capacitor voltage divider 7 is reasonably arranged to reduce the detection capacitor 9C of the actual output 1 Thereby improving the efficiency and reliability of the detection.
The capacitance of the capacitive divider 7 is not limited in this application, including but not limited to 2 to 3PF, and the capacitance and number of the capacitive divider 7 are not limited.
In order to further improve the reliability of the detection and to facilitate the reading, in one embodiment the voltage measuring system of the suspended potential conductor under the overhead transmission line further comprises a display unit connected to the voltage detector 8 for displaying the voltage test value.
The voltage test value is displayed through the display unit, so that reading can be directly carried out, and the convenience of detection is improved.
The type of the display unit and the display mode are not limited in the application.
In order to further realize remote data transmission and remote monitoring, in one embodiment, the voltage measurement system of the suspended potential conductor below the overhead transmission line further comprises a wireless communication module connected with the voltage detector 8, wherein the wireless communication module comprises at least one of a 5G communication module, a 4G communication module, an infrared communication module and a wifi module.
Remote data transmission can be realized through the wireless communication module, remote voltage detection can be realized, and detection efficiency is improved.
The present application includes, but is not limited to, the wireless communication modules described above.
In the present application, the wire 6 is used to transfer the induced charge generated by the metal inductor 1 to the detection capacitor 9C 1 In order to improve the charge transfer efficiency, in one embodiment, the voltage measurement system of the suspended potential conductor under the overhead transmission line further comprises an air connector 2 circumferentially connected with the metal inductor 1, and the air connector is used for receiving and conducting charges generated by the metal inductor 1 to the conducting wire 6.
After the metal inductor 1 is circumferentially connected through the aviation connector 2, generated charges are transferred to the lead 6, so that transfer efficiency can be improved, the situation that the part, far away from the connector of the lead 6, of the metal inductor 1 cannot be conducted to the lead 6 can be avoided, and the receiving efficiency of induced charges is improved. The structure and dimensions of the aircraft joint 2 are not limited in this application,
The insulating support 5 is used for supporting the metal inductor 1, the structure of the insulating support is not limited, and the insulating support 5 is a wooden support or a plastic support or the insulating support 5 made of other materials.
In order to further realize the detection of the voltage at all positions, in one embodiment, the insulating support 5 is a height-adjustable insulating support 5, and the height adjustment range of the height-adjustable insulating support 5 is 95-115cm.
The height-adjustable insulating support 5 in this application can be to the height of landing leg be adjusted, can be similar to slide caliper structure and carry out sliding adjustment, can also be set up small-size cylinder therein, through motor drive adjustment, perhaps adopt other modes to adjust, this application is not limited to.
The metal inductor 1 is used for charge induction, the shape and the business trip are not limited, the metal inductor 1 is a metal disc, a metal sphere or a metal round bar, or other metal inductors 1, the material of the metal inductor 1 is not limited, and the metal inductor 1 can be a copper metal inductor 1 or an iron metal inductor 1.
Preferably, the metal inductor 1 is a metal sphere, and the diameter of the metal sphere is 0.05m-0.2m.
In this application, the installation mode and the size of the insulating holder 4 are not limited, and generally, the diameter of the insulating holder 4 is not more than 15cm.
In order to further improve the structural and dimensional parameters of the insulating support 3, but in order to improve the height adjustment of the metal inductor 1, in one embodiment, the insulating support 3 is an insulating support screw, and the adjustment range of the insulating support screw is 0-50cm.
In one embodiment, in the voltage measurement system of the suspended potential conductor below the overhead transmission line, a metal sphere is placed in a near-ground area below the high-voltage transmission line to induce a potential; the aviation connector 2 is connected with a metal sphere and a wire 6; the support nut is made of insulating materials and is used for supporting the metal ball; the cradle head plays a role of supporting the metal ball; the wooden tripod can be height-adjustable to finish measurement of different heights; the wire 6 is used for connecting the metal conductor ball with the voltage measuring device; the capacitive voltage divider 7 is connected in series with the detection capacitor 9C 1 The potential measuring device is used for completing potential measurement of the metal conductor ball; the voltmeter is connected in parallel with the detection capacitor 9C 1 And finally, finishing the voltage display of the metal conductor ball. The measurement principle of the high-voltage dividing device and the low-voltage reality device is shown in fig. 2.
As a measurement method of the induced voltage of the metal inductor 1, there are a contact type voltage measurement method and a non-contact type voltage measurement method.
The non-contact voltage measuring instrument needs to put an object to be measured into a groove of the non-contact voltage measuring instrument for voltage measurement, and in the method, a metal body is selected as an inductor, and the non-contact inductor cannot be directly used for direct measurement of the induced voltage of the metal inductor 1.
The contact voltage measuring instrument is characterized by simple principle and easy operation, and can directly contact the measuring device with the inductor to measure the voltage.
To achieve a more accurate measurement, the resistance of the capacitive divider 7 is selected in relation to the capacitance of the metal inductor 1 to ground. The capacitance value of the inductor to the ground needs to be solved, and the selection work of the capacitance value of the capacitive voltage divider 7 is completed.
Measurement protocol selection of metal inductor 1. The relative error result after the correction of the metal sphere correction algorithm is better than the correction result of the metal disc and the metal round bar.
When the metal inductor 1 is a metal disc and a metal round bar, in field measurement, the end surfaces of the disc and the round bar are required to be horizontal, so that the measurement difficulty is increased.
For the convenience of measurement operation, a metal sphere is selected as the metal inductor 1.
The size of the metal sphere is selected. Simulation results show that the correction relative errors are less than 0.003%, and the fact that the metal conductor balls with the radius can be used as inductors is explained.
In the selection of the radius of the metal sphere, when the radius of the metal sphere is too small, the induced voltage is not necessarily capable of driving a voltage measurement system, and under the condition of comprehensively considering convenience, the diameter of the processed metal conductor sphere is selected to be 10cm and 20cm for subsequent field test.
In the contact voltage measurement method, a capacitive voltage divider 7 is adopted in a measurement system to realize measurement of high-voltage alternating current. In FIG. 2, the left side is the high voltage section, using capacitive divider 7, formed by capacitive divider 7C 2 And a detection capacitor 9C 1 Two parts. High voltage U i Input from the upper end equalizing ball, input from the capacitor C 2 The output of the low-voltage sampling signal U 0 The method comprises the steps of carrying out a first treatment on the surface of the The right side is a low voltage display meter for processing the low voltage sampling signal U 0 . Low voltage sampling signal U 0 And the processed product is sent to a low-voltage display table for display after rectifying, filtering and amplifying. High voltage U i And a low voltage sampling signal U 0 The relationship is shown in the following formula:
in the induction sensing device, an induction measuring device, that is, a measuring device composed of the capacitive voltage divider 7 and the voltmeter is first determined. To achieve a more accurate measurement, the resistance of the capacitive divider 7 is selected in relation to the capacitance of the metal inductor 1 to ground.
Then, the capacitance value of the inductor to the ground needs to be solved, and the selection work of the capacitance value of the capacitive voltage divider 7 is completed, so that a proper capacitance is selected.
The capacitance of the system formed by the metal inductor 1 and the ground is related to the charge amount carried by the metal inductor 1 and the potential of the metal inductor 1, and the relationship can be expressed by the following relational expression:
wherein q is the amount of charge carried by the metal inductor 1,the voltage to ground for the metal inductor 1.
In the calculation of the capacitance to ground of the metal sphere, the system capacitance value is formed by the metal sphere and the ground, and the solution is carried out by adopting an analysis method and a COMSOL software simulation method.
(1) Analytical method
According to the capacitance value of the system formed by the metal sphere and the ground, the capacitance of the ground can be solved by the metal sphere by giving the metal sphere 1V potential and knowing the charge quantity carried by the metal sphere.
When the potential of the metal sphere is known, the solution of the charge quantity carried by the metal sphere is carried out by adopting an analog charge method. The metal sphere is decomposed into n charged circular rings, and n potential matching points are taken on the surface of the metal sphere.
The equation is written for n potential matching point columns, and the following equation sets are possible:
the method comprises the steps of obtaining a plurality of analog charge rings, wherein n unknowns and n equations are used, and the charge quantity of each analog charge ring can be obtained by solving an equation set. The amount q of charge carried by the metal sphere can be expressed by the following formula:
q＝∑τ i 。
2. in COMSOL simulation software, simulation modeling calculation is carried out on a metal sphere and ground composition system, and because the sphere and the ground composition system have axisymmetry, modeling in a two-dimensional axisymmetric model can be adopted to simplify calculation.
Modeling a system formed by the metal ball and the ground by using simulation software, wherein in a simulation diagram, the outer calculation domain is 5m wide and 10m high, and the radius of the metal conductor ball is 0.1m. The metal conductor balls are respectively placed at the capacitance values of the simulation balls with the heights of 0.5m, 1m, 1.5m and 2m to the ground. And programming the analytical method by using MATLAB. The calculation results are shown in the following table.
Sphere to ground capacitance
The relative error graph of the capacitance value of the metal conductor ball to the ground relative to the capacitance value calculated by the analytical method is shown in fig. 3. As can be seen from fig. 3, the relative error between the simulation result and the analysis calculation result is less than 0.009%, and the simulation result and the calculation result are considered to be approximately equal, which is the capacitance value of the metal conductor ball to the ground.
The capacitive voltage division configuration is selected as follows:
(1) Metal inductor 1 selection
As can be seen from the results of the above-mentioned com simulation and program correction relative errors, the correction results of the metal sphere correction algorithm are better than those of the metal disc and the metal rod.
When the metal inductor 1 is placed in the area near the ground below the high-voltage transmission line to perform induction potential measurement, when a metal disc and a metal round bar are used, the disc and the round bar end face are required to be horizontal in subsequent field tests, and the measurement difficulty is increased. In the selection of the metal sensor 1 for facilitating the subsequent measurement, a metal sphere is selected as the metal sensor 1.
(2) Selection of metal sphere size
The metal sphere is selected as an inductor for induction electricity measurement in a near-ground area below the high-voltage transmission line, and the size of the inductor needs to be determined in the subsequent device processing. The impact of sphere size on the correction algorithm was explored by COMSOL simulation and correction procedure before machining.
In the COMSOL simulation software, simulation modeling calculation is performed on the metal sphere and ground composition system, and because the metal sphere and the ground composition system have axisymmetry, modeling in a two-dimensional axisymmetric model can be adopted to simplify calculation.
Metal sphere radius selection simulation model
In simulation software, the radii of the metal conductor balls are set to be different sizes, the metal conductor balls with different radii are placed at the position 1m away from the ground, simulation measurement voltages are carried out on the metal conductor balls with different radii, the simulation voltages are corrected by a correction program, simulation results and correction results of the different radii are shown in the following table, and relative errors of the simulation voltages are shown in fig. 4.
Simulation results of metal spheres with different radiuses and sizes
As can be seen from fig. 4, the experimental results show that when the metal conductor ball is placed at a height of 1m from the ground, a metal ball is placed in the uniform electric field, the original electric potential at the place where the ball is placed is reversely pushed by measuring the electric potential of the ball, and under the condition of different ball radii, the correction relative error is less than 0.003%, which indicates that the metal conductor ball with the radius can be used as an inductor.
When the radius of the metal sphere is selected, the two aspects of convenience and performance are considered comprehensively, the metal sphere is not easy to carry when the radius of the metal conductor sphere is too large, the induced voltage below the high-voltage overhead transmission line is not necessarily capable of driving the voltage measurement system when the metal conductor sphere is too small, and under the condition that the relative errors are small, the two metal spheres with the diameters of 0.1m and 0.2m are selected to be processed.
The measurement steps in one embodiment are as follows:
the step of placing the metal sphere below the high-voltage transmission line to finish the voltage measurement below the transmission line can be performed according to the following steps:
the first step: a metal inductor 1 is arranged below the high-voltage transmission line;
and a second step of: measuring the induction voltage of the metal sphere by using a capacitive voltage divider;
and a third step of: the distortion influence of the metal sphere on the space electric field is considered, an analog charge method is applied to correct the distortion voltage, and the electric field intensity in the vertical direction of the electric field below the high-voltage transmission line and the analog charge quantity of the metal sphere are obtained;
fourth step: and (3) finishing the calculation of the voltage of the area near the ground below the high-voltage transmission line according to the formula, the electric field strength in the vertical direction of the electric field and the height of the metal conductor ball.
The voltage measurement under the high-voltage transmission line can be completed through the steps.
The metal inductor 1 placed under the high-voltage transmission line may be a metal sphere, a metal disc, a metal rod, or the like.
(1) To achieve a more accurate measurement, the resistance of the capacitive divider 7 is selected in relation to the capacitance of the metal inductor 1 to ground. The capacitance value of the inductor to the ground needs to be solved, and the selection work of the capacitance value of the capacitive voltage divider 7 is completed.
(2) Measurement protocol selection of metal inductors 1
The relative error result after the correction of the metal sphere correction algorithm is better than the correction result of the metal disc and the metal round bar. When the metal inductor 1 is a metal disc and a metal round bar, in field measurement, the end surfaces of the disc and the round bar are required to be horizontal, so that the measurement difficulty is increased. For the convenience of measurement operation, a metal sphere is selected as the metal inductor 1.
In one embodiment, the voltage measurement system of the suspended potential conductor below the overhead transmission line consists of a metal conductor ball, a cradle head, a wooden tripod, a supporting screw, a height adjusting hand wheel, a high-voltage lead wire, a grounding wire, a test transmitting module and a far-end receiving module.
The system configuration list in the measuring device is as follows:
measuring system configuration list
The system index of the measuring device is as follows:
(1) The use conditions are as follows: ambient temperature: -10-40 ℃; relative humidity: less than or equal to 85 percent, and no condensation exists; working power supply: a battery is used for supplying power; the grounding mode is as follows: directly grounded.
(2) The main technical indexes are as follows: testing high pressure range: 0-10 kV (AC); frequency range: 30-300 Hz.
Effective value test precision: 1.5 grade; peak-Testing precision: 2 stages.
The isolation mode of the test voltage divider and the display unit is as follows: and (5) wireless.
(3) And (5) using instructions of all parts.
1) The measurement transmitting unit is as follows:
the main technical indexes are as follows: voltage divider capacitance: 3pF; voltage divider impedance: 200MΩ;
test range: 0-10 kV; measurement accuracy: grade 1.5.
Measuring frequency range: 30-300 HZ; testing frequency accuracy: 0.1%.
The test content is as follows: effective value, peak value of alternating voltage +.Crest factor, etc.
Working power supply: a 12V lithium battery continuously works for 8 hours, and the charging time is not less than 4 hours; the display mode is as follows: and (5) wireless data transmission and remote display.
Wireless transmission distance: 10 meters.
Wiring description: the high-voltage measuring end is connected with a screw rod at the lower end of the induction ball by adopting a high-voltage lead wire, and the black grounding wire is grounded; and (3) starting the work by pressing a power switch.
Receiving display unit, function: receiving and displaying a remote voltage test value by adopting wireless;
working power supply: 12V; the display content comprises the following steps: high voltage (RMS), peak high voltage +.High voltage frequency, high voltage crest factor, waveform display, etc.
3) And a high voltage sensing unit. The tripod is a wooden tripod, the diameter of the platform is smaller than 15cm, and the induction ball is not influenced to induce high-voltage; the tripod can be adjusted in height, and the height range is 95-115 cm;
the sensing ball is connected to the platform through a screw rod, and the height is adjusted through a height adjusting hand wheel, and the adjusting range is 0-50 cm; the height of the induction ball can be adjusted according to different requirements.
The induction voltage of the induction ball can be reliably connected with the test voltage divider by directly clamping the high-voltage lead on the adjusting screw.
The operation steps are as follows:
the first step: the metal sphere is connected with the screw rod, the grounding hook is connected with the screw rod at the bottom of the sensing sphere, and the wooden tripod and the screw rod are adjusted together to enable the metal sphere to be at the height to be measured;
and a second step of: the measurement transmitting unit is reliably grounded, and then the high-voltage lead is reliably connected with the lower part of the screw;
and a third step of: opening a receiving display end switch to wait for connection with a measurement transmitting unit;
fourth step: opening a measuring unit switch;
fifth step: and disconnecting the grounding device of the screw rod, and measuring staff away from the measuring device to measure the induced electricity below the high-voltage transmission line.
Notice that:
the receiving display end starts up firstly, displays a starting interface and waits to be connected with the measurement transmitting end; the grounding hook is reliably connected with the bottom of the induction ball; the induction ball is reliably connected with the tripod, and is adjusted to the required height; the high-voltage lead is reliably connected with the measuring unit, and the measuring unit is reliably connected with the ground wire;
starting the measuring unit, and displaying an access working interface at the far end;
manually releasing the grounding hook, and displaying the high voltage as an induced voltage value at the current height;
in the state of induced voltage, when the power is turned off or the height is adjusted, special attention is paid to the fact that the grounding hook is adopted to reliably ground the induction ball, the height is manually adjusted, and then the grounding is released;
after the test is completed, the measuring device is removed after the inductor needs to be fully discharged.
In summary, the voltage measurement system for the suspended potential conductor below the overhead transmission line provided by the embodiment of the invention adopts the detection capacitor C 1 Connect the metal inductor, and carry on the insulating support to the metal inductor through insulating support frame, insulating support body, insulating cradle head, can make the metal inductor transmit the charge induced to the detection capacitor C 1 The detection device does not disappear due to the extension of time, and the detection accuracy and reliability are improved.
The voltage measuring system of the suspended potential conductor below the overhead transmission line provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (10)
1. The utility model provides a voltage measurement system of overhead transmission line below suspension potential conductor which characterized in that includes insulating support frame, insulating branchSupport body, insulating cradle head, metal inductor and detection capacitor C 1 Wherein, the bottom of insulating support frame sets up in the bottom surface, and the bottom is provided with insulating cloud platform, the insulating support body sets up insulating cloud platform is used for supporting the metal inductor, the metal inductor pass through the wire with detect electric capacity C 1 Is connected with the first end of the detection capacitor C 1 Is grounded at the second end of the capacitor C 1 A voltage detector is arranged at two ends of the capacitor C for detecting and outputting the induced charges of the metal inductor 1 Voltage test values formed across the two terminals of (a).
2. The system for measuring voltage of a suspended potential conductor under an overhead transmission line according to claim 1, further comprising a detection capacitor C disposed between said conductor and said detection capacitor C 1 A capacitive voltage divider between the detection capacitor C and the detection capacitor C 1 The capacitors of the capacitive voltage divider are connected in series, and the capacitance of the capacitive voltage divider is 2-3 PF.
3. A voltage measurement system for a suspended potential conductor under an overhead transmission line according to claim 1 or 2, further comprising a display unit connected to the voltage detector for displaying the voltage test value.
4. A voltage measurement system for an overhead transmission line lower levitation potential conductor as defined in claim 3, further comprising a wireless communication module connected to the voltage detector, the wireless communication module comprising at least one of a 5G communication module, a 4G communication module, an infrared communication module, and a wifi module.
5. The system for measuring the voltage of a suspended potential conductor under an overhead transmission line of claim 1, further comprising an air connector circumferentially coupled to the metallic inductor for receiving and conducting an electrical charge generated by the metallic inductor to the conductor.
6. The system for measuring the voltage of a suspended potential conductor under an overhead transmission line according to claim 1, wherein the insulating support frame is a wooden support frame or a plastic support frame.
7. The system for measuring the voltage of a suspended potential conductor under an overhead transmission line according to claim 6, wherein the insulating support is a height-adjustable insulating support, and the height-adjustable insulating support has a height adjustment range of 95-115cm.
8. The system for measuring the voltage of a suspended potential conductor under an overhead transmission line according to claim 1, wherein the metal inductor is a metal disc, a metal sphere or a metal round bar.
9. The system for measuring the voltage of a suspended potential conductor under an overhead transmission line according to claim 8, wherein the metal inductor is a metal sphere, and the diameter of the metal sphere is 0.05m-0.2m.
10. The system for measuring the voltage of a suspended potential conductor under an overhead transmission line according to claim 1, wherein the insulating support body is an insulating support screw, and the adjusting range of the insulating support screw is 0-50cm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311341955.9A CN117471149A (en) | 2023-10-17 | 2023-10-17 | Voltage measurement system of suspended potential conductor below overhead transmission line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311341955.9A CN117471149A (en) | 2023-10-17 | 2023-10-17 | Voltage measurement system of suspended potential conductor below overhead transmission line |
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| CN202311341955.9A Pending CN117471149A (en) | 2023-10-17 | 2023-10-17 | Voltage measurement system of suspended potential conductor below overhead transmission line |
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| CN (1) | CN117471149A (en) |
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