RU189904U1 - Locating device with an arbitrary waveform generator and the possibility of self-diagnosis - Google Patents

Abstract

The utility model relates to the field of electric power engineering and can be used to diagnose the condition of wires of overhead power lines, detect damage and ice on power lines with voltage of 35-750 kV on alternating current, as well as for periodic self-diagnostics of the health of the location complex. The technical result of the utility model is the ability to create arbitrary shape of the probing signals of the location device and the possibility of self-diagnostics of the health of the location device. This is achieved by locating a device with an arbitrary waveform generator and the possibility of self-diagnostics, consisting of a control unit 1, which has an interface input 2, with the ability to connect an external computer 3, the first digital port 4 to which the memory unit 5 is connected, the second digital port 6, to which the output of the digital receiver 7 is connected, according to the present invention, the location device further comprises a third digital port 8, the output of which is connected to the input of the digital-to-analog conversion 9, the output of the D / A converter is connected to the input of the low-frequency filter 10, the output of which is connected to the input of the power amplifier 11, the output of the power amplifier is connected to the input of the matching unit 12, the output of which is connected to the input of the digital receiver 7 and to the input of the switch 13, which has a working output 14 and test output 15, while the operating output of the switch 14 is designed to connect to the measured line 16, and the test output of the switch 15 is connected to the emulator of the measured line 17.

Description

Technical field

The utility model relates to the field of electric power industry and can be used to diagnose the condition of wires of overhead power lines, detect damage and ice on power lines with a voltage of 35-750 kV on alternating current, as well as for periodic self-diagnostics of the location of the location complex.

The level of technology

A device is known for impulse locating wires of a power line (RF Patent No. RU 110555 U1, IPC H02G 7/16 dated May 13, 2011), which contains a probe pulse generator and an echo receiver connected through a system of connection to a controlled portion of the power line wire barrier, serially connected digital processing unit of reflectograms, memory unit of reflectograms, display unit, which are connected to the control unit of the device, with the second output of the memory block reflectograms are connected to the second input of a digital processing unit of reflectograms, the first input of which is connected to the receiver of the reflected signal, according to the claimed utility model, the digital processing unit of reflectograms is configured to calculate the amplitude-frequency spectrum of the reflectogram using the Fourier transform method and reverse reconstruction after removing the frequency band from the spectrum occupied by the transmitters of the relay protection, emergency control, telemechanics and communication devices.

A device is known for locating sensing of a transmission line adopted for the prototype (RF Patent No. RU 126216 U1, IPC H02G 7/16 dated 10/23/2012), which contains a generator, the output of which is intended to be connected to a controlled section of a wire of a transmission line, a receiver of reflected signals connected to the digital processing unit with a graphic indicator at the output, and a control unit of the generator, receiver and graphic indicator, while the generator is configured to form bipolar rectangular pulses close to about amplitude.

Both of these devices, including the prototype, form probing pulses of a rigidly defined shape, and are not capable of changing the shape of the location pulses. In addition, these devices are not capable of self-monitoring device performance.

Disclosure of utility model

The task of the utility model is to develop a location device in which the shortcomings of the prototype are eliminated.

The technical result of the utility model is the ability to create an arbitrary shape of the probing signals of the location device and the ability to self-diagnose the health of the location device.

The technical result is achieved by the location device with an arbitrary waveform generator and the possibility of self-diagnosis, consisting of the control unit 1, which has an interface input 2, with the ability to connect an external computer 3, the first digital port 4 to which the memory unit 5 is connected, the second digital the port 6, to which the output of the digital receiver 7 is connected, according to the present utility model, the location device further comprises a third digital port 8, the output of which is connected to the input of the digital-analogs The converter 9 is connected to the input of a low-frequency filter 10, the output of which is connected to the input of power amplifier 11, the output of power amplifier is connected to the input of matching unit 12, the output of which is connected to the input of digital receiver 7 and to the input of switch 13, which has the working output 14 and the test output 15, while the working output of the switch 14 is designed to connect to the measured line 16, and the test output of the switch 15 is connected to the emulator of the measured line 17.

Implementation of the utility model

A diagram of the inventive location device with an arbitrary waveform generator and the possibility of self-diagnosis is presented in FIG. one.

The numbers in FIG. 1 marked:

1 - control unit;

2 - interface input;

3 - external computer connected to the locating device;

4 - the first digital port;

5 - memory block;

6 - the second digital port;

7 - digital receiver;

8 - the third digital port;

9 - digital-to-analog converter;

10 - low-pass filter;

11 - power amplifier;

12 - matching unit;

13 - switch input;

14 - switch operating output;

15 - test output of the switch;

16 - measurable line connected to the locating device;

17 - emulator of the measured line.

The locating device with an arbitrary waveform generator and the possibility of self-diagnosis works as follows. The locating device with its control unit 1, through the interface input 2 is connected to an external computer 3, with which the user configures the locating device. The setting consists, among other things, of loading through the first digital port 4 into the memory block 5 test reflectograms, which consist of a sequence of amplitudes of points, which form a reflectogram model formed when reflecting the sounding device of the probing signal from heterogeneities of the location signal.

These test traces are used during the self-control of the location device: during self-diagnosis, the control unit 1 reads the required test trace from one memory unit 5, and via the third digital port 8 supplies the data points to the input of the digital-to-analog converter 9, which converts the digital amplitudes of the points into an analog signal . Next, this analog signal, through power amplifier 10, low-frequency filter 11 and matching unit 12, goes to the input of switch 13 and to the input of digital receiver 7. Blocks 9, 10, 11 and 12 together form a so-called arbitrary waveform generator.

The input of the switch 13 in the operating mode is connected to the working output of the switch 14, with which the location device is connected to the measured line 16, in the self-diagnosis mode the input of the switch 13 is connected to the test output 15, which is connected to the emulator of the measured line 17 (in order for the operation mode did not change during self-diagnosis). During self-control, a full check of the location device is performed: generation of sensing signals (formation of a test reflectogram), reception of a reflectogram (reception of a test reflectogram by a digital receiver 7), processing of a reflectogram by the control unit 1 (which receives a test reflectogram from the output of the digital receiver 7 to the second digital port 6) , comparing the results of processing the test trace by the control unit 1 with the correct result for this test trace. In this case, the test trace can describe the trace in different modes of operation of the measured line 16: normal mode (reflection from the end of line 16), short circuit mode (reflection from the short circuit location), mode of ice formations (reflection from the end of line 16 with additional attenuation and echo delays). In all these modes in self-test mode, the control unit 1 must correctly determine the test mode used.

In addition, when setting the location device, the memory of the memory unit 5 loads the location signals, which are used by the location device in the operating mode, for sensing the measured line 16. At the same time, the location signals can have any shape, since the waveform is recorded sequentially in time by points (each the point has its own amplitude and is given out after a specified period of time): video pulse, radio pulse, narrow-band bell-shaped radio pulse, etc. In the operating mode, the control unit 1 reads one location from the memory unit 5 the desired location signal, and via the third digital port 8 and the arbitrary waveform generator (blocks 9, 10, 11, 12) supplies this location signal to the input of the switch 13 and to the input digital receiver 7. The input of the switch 13 in the operating mode is connected to the working output of the switch 14, through which the location device is connected to the measured line 16. Thus, the measurement of the reflectogram takes place: on the measured line 16 the location device is fed location signal reflected from measured line 16 signals (reflectogram) get to location device through working output of switch 14, and through input of switch 13 to input of digital receiver 7, then from output of digital receiver 7 through second digital port 6 to control unit 1, which records the received reflectogram through the first digital port 4 into the memory of memory block 5, the control unit 1 processes the received reflectogram, determines the operation mode of the measured line 16 according to the results of processing.

Thus, the locating device with an arbitrary waveform generator and the possibility of self-diagnostics has the ability to create an arbitrary shape of the probing signals of the locating device and the possibility of complete self-diagnostics of the health of the locating device.

Claims (1)

Locating device with an arbitrary waveform generator and the possibility of self-diagnosis, consisting of a control unit that has an interface input, with the ability to connect an external computer, the first digital port to which the memory unit is connected, the second digital port to which the output of the digital receiver is connected, distinguished by that the location device additionally contains a third digital port, the output of which is connected to the input of the digital-to-analog converter, the output of the digital-to-analog converter of the connection with the input of the low-frequency filter, the output of which is connected to the input of the power amplifier, the output of the power amplifier is connected to the input of the matching unit, the output of which is connected to the input of the digital receiver and to the input of the switch, which has a working output and test output, while the working output of the switch is designed for connection with the measured line, and the test output of the switch is connected to the emulator of the measured line.

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