CN211086482U

CN211086482U - Power distribution overhead line fault positioning system

Info

Publication number: CN211086482U
Application number: CN201921542648.6U
Authority: CN
Inventors: 张佰玲; 刘惠聪; 王首坚; 李洪卫; 熊彪; 王佳佳; 李伟
Original assignee: Shenzhen Power Supply Bureau Co Ltd
Current assignee: Shenzhen Power Supply Bureau Co Ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-07-24
Anticipated expiration: 2029-09-17

Abstract

The utility model discloses a distribution overhead line fault positioning system, which comprises a signal transmission device and a control terminal; the signal transmission device utilizes the electric control roller hung on the overhead cable to move back and forth, so that the signal receiving device does not need to be disassembled when the signal receiving position is replaced, the signal transmission device is more convenient to use, and the working efficiency is improved; the positioning terminal is additionally provided with a motor control key which can be used for controlling a signal receiving device with an electric control roller, so that the field operation is more convenient, the frequent replacement of fault detection positions is avoided, and the working efficiency is improved; and the key design is perfect, can carry out multiple operation, and the whole system design is ingenious, and the cooperation is used and can be promoted work efficiency and very easily operate.

Description

Power distribution overhead line fault positioning system

Technical Field

The utility model relates to a power failure detects technical field, in particular to distribution overhead line fault positioning system.

Background

The power distribution network is an important part of a power system, is directly connected with thousands of households, has multiple points and wide range, and directly influences the power supply of one area or even a city due to the fault of the power distribution network. Therefore, it is necessary to detect the type of the fault, locate the fault point, and shorten the repair time accurately and rapidly by effective technical means. In recent years, a distribution line trial transmission positioning device based on a direct-current high-voltage special frequency signal technology appears in China, a signal output host outputs a direct-current high-voltage trial transmission signal to be loaded on a tested line, then a special frequency alternating current signal is superposed into the direct-current high-voltage signal in a coupling mode, then signal detection is carried out at a distance through a signal receiving device in a caliper mode, when the special frequency signal is detected, the situation that the line from the signal output host end to a caliper position is normal is indicated, and when the amplitude, the phase or the frequency of the special frequency signal or the special frequency signal cannot be detected, the situation that a fault exists between the last test position and the current test position is indicated, and the fault needs to be continuously checked until the fault position is located.

The current special frequency signal receiving device used by the fault location method is originally used for replacing different test positions by insulating rod calipers. Or the position is changed in an unmanned aerial vehicle mode, and the operation is inconvenient.

Therefore, there is a need for a new fault location system for overhead power distribution lines that overcomes the problems of the prior art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a distribution overhead line fault positioning system, convenient to use has promoted work efficiency.

The utility model aims at realizing through the following technical scheme:

the power distribution overhead line fault positioning system comprises a signal transmission device and a control terminal;

the signal transmission device comprises a main box body, wherein the bottom of the main box body is provided with a connecting structure used for being connected with an external insulating rod, the top of the main box body is provided with at least two roller structures used for walking on a cable, the current transformer is arranged in the middle, the roller structures are respectively arranged on two sides of the current transformer, the body of the current transformer is of a left-right sectional structure, the left half body and the right half body of the current transformer are connected together through a closable pincerlike structure arranged on the top, the lower parts of the left half body and the right half body are respectively provided with a return spring, the closable pincerlike structure is opened when the closable pincerlike structure is subjected to external top-down or bottom-up pressure, and the closable pincerlike structure is closed under the action of the return spring after the pressure disappears; the intelligent power supply system comprises a main box body, a current transformer, a power supply module and a power supply module, wherein the main box body is internally provided with an MCU (microprogrammed control Unit), a filter circuit, a peak holding circuit, a detection circuit, a battery power supply module, a wireless communication module and a motor driving circuit;

the control terminal comprises an MCU processing unit, a data storage module, a key detection matrix, a state display module, a wireless transmission module and a power supply unit, wherein the data storage module is electrically connected with the MCU processing unit and used for storing acquired data;

particularly, the roller structures all comprise supporting rods, driving motors and roller bodies, walking grooves for embedding cables are formed in the outer wheel surfaces of the roller bodies, the driving motors are arranged on the supporting rods, the roller bodies are arranged on the output shafts of the driving motors, the central axes of the roller bodies of the roller structures are parallel to the cross section of the current transformer body, the lower end face of any roller body falls into the vertical projection area of the current transformer body and does not intersect with the vertical projection area, and the cables can be respectively embedded into the roller bodies on the left side and the right side of the current transformer and cannot contact with the current transformer body after entering the current transformer body;

in particular, the closable pincer-like structure is a double-V-shaped caliper structure;

particularly, the connecting structure for connecting with the external insulating rod is a threaded screw rod matching structure or a caliper structure;

particularly, the control terminal further comprises a state display module, wherein the state display module is electrically connected with the MCU processing unit II and comprises a plurality of L ED display lamp beads for displaying different states.

The utility model has the advantages that:

the utility model comprises a signal transmission device and a positioning terminal, wherein the signal transmission device utilizes an electric control roller wheel hung on an overhead cable to move back and forth, so that the signal receiving device does not need to be disassembled when the signal receiving position is changed, the use is more convenient, and the working efficiency is improved; the positioning terminal is additionally provided with a motor control key which can be used for controlling a signal receiving device with an electric control roller, so that the field operation is more convenient, the frequent replacement of fault detection positions is avoided, and the working efficiency is improved; and the key design is perfect, can carry out multiple operation, and the whole system design is ingenious, and the cooperation is used and can be promoted work efficiency and very easily operate.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the present invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.

Drawings

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, in which:

FIG. 1 is a front view of an external structure of a signal transmission device;

FIG. 2 is a side view of the signal transmission device;

FIG. 3 is a schematic diagram of a module connection of the signal transmission apparatus;

fig. 4 is a circuit diagram of a peak hold circuit of the signal transmission device.

FIG. 5 is a schematic diagram of the connection of internal modules of the control terminal;

FIG. 6 is an external display diagram of the control terminal;

fig. 7 is a circuit diagram of a key detection matrix of the control terminal.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention.

As shown in fig. 1 and fig. 2, the utility model discloses a distribution overhead line fault positioning system, which comprises a signal transmission device and a positioning terminal; the signal transmission device comprises a main box body 1, a connecting structure 2 used for being connected with an external insulating rod is arranged at the bottom of the main box body 1, two roller structures 3 and a current transformer 4 are arranged at the top of the main box body, the current transformer 4 is arranged in the middle, the roller structures 3 are respectively arranged at two sides of the current transformer 4, the body of the current transformer 4 is of a left-right sectional structure, the left half body and the right half body are connected together through a closable pincerlike structure 5 arranged at the top, the lower parts of the left half body and the right half body are respectively provided with a return spring 6, the closable pincerlike structure is opened when being subjected to external top-down or bottom-up pressure, and the closable pincerlike structure is closed under the action of the return springs after the pressure disappears; in this embodiment, the closable pincer-shaped structure is a double-V-shaped caliper structure, and is convenient to use. The connecting structure for being connected with the external insulating rod can be a threaded screw rod matching structure or a caliper structure, and the insulating rod can be firmly connected with the main box body.

The roller structures all comprise a supporting rod 7, a driving motor 8 and roller bodies 9, walking grooves 10 used for embedding cables are formed in the outer wheel surfaces of the roller bodies 9, the driving motor 8 is arranged on the supporting rod 7, the roller bodies 9 are arranged on the output shafts of the driving motor 8, the central axes of the roller bodies of the roller structures are parallel to the cross sections of the current transformer bodies, the lower end face of any one roller body falls into the vertical projection area of the current transformer body and does not intersect with the vertical projection area of the current transformer body, and after the cables enter the current transformer body, the cables can be respectively embedded into the roller bodies on the left side and the right side of the current transformer and cannot contact with the current transformer; in this embodiment, the support rod is made into an N-shape, but an a-shape or a trapezoid structure may be adopted.

The inside of device main tank body is provided with MCU processing unit, filter circuit, peak hold circuit, detection circuitry, battery power module, wireless communication module and motor drive circuit, the current signal that current transformer gathered is through filter circuit and peak hold circuit processing back, send into MCU processing unit through detection circuitry, motor drive circuit and driving motor electric connection, battery power module is used for MCU processing unit, wireless communication module and motor drive circuit's power supply. The signal receiving device is connected with the hand-held remote controller through the wireless communication module and carries out remote control. The filter circuit, the detection circuit, the battery power supply module, the wireless communication module, and the motor driving circuit are conventional design circuits in the art, and are not described herein, and fig. 4 is a circuit design diagram of the peak holding circuit in this embodiment. As shown IN the figure, the sampling signal is input to the signal input end rectified by the DB107 rectifying bridge, the positive electrode signal output end of the rectifying bridge is input to the signal input end IN of the amplifier D after passing through the fourth resistor R4 and the third capacitor C3 which are connected IN parallel, and the negative electrode output end of the DB107 is grounded. The 1 st pin of the amplifier D is connected with a +/-5V power supply and is grounded through a 4 th capacitor C4, the 4 th pin of the amplifier D is connected with a-5V power supply, an 8 th pin of the amplifier D is a first path of control signal input pin of the MCU processing unit, a 7 th pin of the amplifier D is connected with the +/-5V power supply through a twelfth resistor and is grounded through a thirteenth resistor, a 6 th pin is grounded through a 6 th capacitor C6 and is connected with a collector of a first triode T1, a base of the T1 acquires a second path of control signal sent by the MCU processing unit through a 7 th resistor R7, an emitter of the T1 is grounded, a 2 nd pin of the amplifier D is connected with the +/-5V power supply through a fifth resistor R5, and the 2 nd pin is grounded through a 6 th resistor R6. And a 5 th pin of the amplifier is a signal output end and outputs a peak voltage output signal. By adopting the peak holding circuit, the influence of sampling on the peak value error is avoided, the measured peak value data is more real and reliable, and the result judgment is more accurate.

As shown in fig. 5 and fig. 6, the control terminal of the present invention includes:

(1) the MCU processing unit: detect the button detection module through real-time scanning's mode, the utility model discloses the model of the MCU processing unit who adopts in is the MSP430F5438A of TI company, and this device has a powerful 16 bits RISCCPU, uses 16 bit registers and normal number generator to obtain the highest coding efficiency. The Digitally Controlled Oscillator (DCO) can wake up from the low power mode to the active mode within 3.5 mus (typical value).

The configuration of MSP430F5438A microcontroller includes three 16-bit timers, a high-performance 12-bit ADC, up to four USCI, a hardware multiplier, DMA, RTC module with alarm function and up to 87I/O pins, well suited for the use of the present invention.

(2) A data storage module: the MCU processing unit is electrically connected with the storage unit and used for storing the acquired curve data;

(3) the display unit comprises a display screen and a display driving module, wherein the signal input end of the display driving module is electrically connected with the MCU processing unit, and the signal output end of the display driving module is electrically connected with the display screen; the display content comprises the maximum peak value of the signal, the frequency of the signal, the polarity of the signal and the like, so that the signal state can be observed very intuitively, and the follow-up judgment is facilitated. It should be noted that, the above information is derived from the processing result of the MCU processing unit and the data storage unit, and the related data processing technology belongs to the known technology of those skilled in the art, and does not belong to the protection scope of the present invention, and is not described herein again. In this embodiment, the display screen is a RoboPeak Mini USB display screen. The RoboPeakMini USB display screen can support any computing equipment with the USB Host communication function through a matched driving program to serve as a standard display and a touch screen device of the computing equipment, any existing graphical interface program can be displayed through the display screen without being modified, and a worker can be supported to operate in a touch mode.

(4) The key detection matrix is electrically connected with the MCU processing unit and comprises a plurality of control keys, in the embodiment, forward, backward, leftward and rightward movement, setting, memorizing and starting measurement keys are adopted, wherein the forward and backward movement are motor control keys and are used for controlling a signal receiving device on an overhead line, when the measurement is started, a state indicating module can flicker L ED to display to prompt that the measurement is in progress, when the measurement is started, the control terminal sends total internal detection time length data to a signal receiving terminal to sample the time length data only, and the technical characteristics of data calling, display and the like related to key operation, relating to built-in programs or calculation are the prior art and do not belong to the protection range of the utility model, the key control matrix adopted in the embodiment is a 2 × 4 matrix, and a circuit diagram of the key control matrix is shown in fig. 7.

(5) The state display module is electrically connected with the MCU processing unit and comprises a plurality of L ED display lamp beads for displaying different states, and the state display module comprises a power supply indicator lamp, a communication connection indicator lamp and a measurement state indicator lamp in the embodiment.

(6) Wireless transmitting module, in this embodiment, adopts the WIFI communication module of low-power consumption, and communication distance is greater than 100m for carry out wireless communication with signal receiver on the overhead line. When the handheld control terminal is powered on, the wireless transmitting module can automatically search peripheral WIFI signals, and when the SSID of the detected signals is the same as the preset SSID, handshake connection can be automatically completed. After the connection is successful, the communication indicator lamp is always on. The WIFI module between the handheld control terminal and the signal receiving terminal adopts unified setting, the setting is finished when the handheld control terminal leaves a factory, and no operation is required on site.

(7) A power supply unit: and the MCU processing unit and the wireless transmitting module are electrically connected and used for supplying power to all the components.

The utility model discloses improvement to key control mainly has: (1) the motor control function is added corresponding to the signal receiving device controlled by the motor, the forward and backward control buttons are arranged, and the signal receiving device on the wire can finish walking through the two buttons; (2) and adding a starting measurement function and a key, taking the key triggering starting time as the starting time of a measurement period, and setting the default test period to be 1 minute. Namely, the time for each fault detection is 1 minute, so that the time lengths are consistent when the faults are detected at different positions, and the data is more effective and accurate.

When the system is used, firstly, a signal transmission device is placed on a lead, and the specific process is as follows: the closable pincerlike structure is aligned with the wire and is pushed upwards by the insulating rod with force to enable the opening and closing position of the current transformer to be stressed and then opened, the wire enters the current transformer, then the position of the wire is adjusted, the wire is suspended in the wire clamping groove, then the insulating rod is separated from the main box body, the installation is completed, and the signal receiving device can walk on the line after the installation is completed. The control terminal can be used to control the signal transmission device and receive various measurement signals from the signal transmission device.

After the test is finished, the main box body is connected with the insulating rod, the position of the main box body is adjusted to enable the main box body to be located below the closable pincerlike structure after being separated from the overhead cable, and then the mutual inductor can be opened again by exerting downward force to enable the main box body to be separated from the cable.

The signal transmission device has the following characteristics:

(1) two motors and a control module are added, so that the signal receiving device can be directly moved on a distribution line, and when the signal receiving position is replaced, the signal receiving device can be controlled only in a wireless mode.

(2) Two support rods and a roller with a motor driving function are added to the structure of the signal receiving device, so that the whole signal receiving device can be hung on a distribution line;

(3) a peak value holding circuit is added for measuring a peak value signal detected when a measurement period is finished at a certain detection position, so that the peak value information can be reflected more accurately.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides a distribution overhead line fault positioning system which characterized in that: the system comprises a signal transmission device and a control terminal;

the signal transmission device comprises a main box body, wherein the bottom of the main box body is provided with a connecting structure used for being connected with an external insulating rod, the top of the main box body is provided with at least two roller structures used for walking on a cable, the current transformer is arranged in the middle, the roller structures are respectively arranged on two sides of the current transformer, the body of the current transformer is of a left-right sectional structure, the left half body and the right half body of the current transformer are connected together through a closable pincerlike structure arranged on the top, the lower parts of the left half body and the right half body are respectively provided with a return spring, the closable pincerlike structure is opened when the closable pincerlike structure is subjected to external top-down or bottom-up pressure, and the closable pincerlike structure is closed under the action of the return spring after the pressure disappears; an MCU processing unit I, a filter circuit, a peak holding circuit, a detection circuit, a battery power supply module and a wireless communication module are arranged in the main box body, current signals acquired by the current transformer are processed by the filter circuit and the peak holding circuit and then are sent to the MCU processing unit I through the detection circuit, and the battery power supply module is used for supplying power to the MCU processing unit I and the wireless communication module;

the control terminal comprises an MCU processing unit II, a data storage module, a key detection matrix, a wireless transmitting module, a display unit and a power supply unit, wherein the data storage module is electrically connected with the MCU processing unit II and used for storing acquired data; the display unit comprises a display screen and a display driving module, wherein the signal input end of the display driving module is electrically connected with the MCU processing unit II, and the signal output end of the display driving module is electrically connected with the display screen; the key detection matrix is electrically connected with the MCU processing unit and comprises a plurality of control keys; the wireless transmitting module is used for carrying out wireless communication with a signal transmission device on the overhead line; and the power supply unit is electrically connected with the MCU processing unit II and used for supplying power to each component.

2. The electrical distribution overhead line fault location system of claim 1, wherein: the gyro wheel structure all includes bracing piece, driving motor and gyro wheel body, the outer round of face of gyro wheel body all is provided with the walking groove that is used for imbedding the cable, driving motor sets up on the bracing piece, the gyro wheel body sets up on driving motor's output shaft, and the axis of the gyro wheel body of gyro wheel structure all is on a parallel with the cross section of current transformer body, and the lower terminal surface of arbitrary gyro wheel body all falls into in the vertical projection area of current transformer body and non-intersect, can imbed the current transformer left and right sides gyro wheel originally internally and can not contact the current transformer body respectively after the cable gets into the current transformer body, still be provided with motor drive circuit in the main tank, motor drive circuit and driving motor electric connection, motor drive circuit supply power through power supply unit.

3. The electrical distribution overhead line fault location system of claim 1, wherein: the closable pincer-shaped structure is a double-V-shaped caliper structure.

4. The electrical distribution overhead line fault location system of claim 1, wherein: the connecting structure used for being connected with the external insulating rod is a threaded screw rod matching structure or a caliper structure.

5. The power distribution overhead line fault location system of claim 1, wherein the control terminal further comprises a status display module electrically coupled to the MCU processing unit II, the status display module comprising a plurality of L ED display lamp beads for displaying different statuses.