KR101692529B1 - Apparatus and method for generating simulated partial discharge signal - Google Patents

Apparatus and method for generating simulated partial discharge signal Download PDF

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KR101692529B1
KR101692529B1 KR1020150129102A KR20150129102A KR101692529B1 KR 101692529 B1 KR101692529 B1 KR 101692529B1 KR 1020150129102 A KR1020150129102 A KR 1020150129102A KR 20150129102 A KR20150129102 A KR 20150129102A KR 101692529 B1 KR101692529 B1 KR 101692529B1
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South Korea
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partial discharge
signal
wave
unit
impulses
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KR1020150129102A
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Korean (ko)
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유인창
한국찬
심상만
정진군
송은수
박황호
차영석
이한웅
박재홍
강상구
문준호
이용수
강영근
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유호전기공업주식회사
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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
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • 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
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • 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
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • 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
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits

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  • Testing Relating To Insulation (AREA)

Abstract

A pulse signal having a waveform in which impulses generated in a predetermined period are arranged is formed by modifying a reference signal having a waveform having a repetitive periodic shape, and a pulse signal having a waveform corresponding to a partial discharge type According to the algorithm for controlling the output time and the modification of the waveform of the pulse signal based on the values of the partial discharge characteristic factors determined within the range of the discharge characteristic parameters, it is preferable that impulses are clustered and generated every constant phase interval of each cycle of the system AC signal By modifying the waveform of the pulse signal and outputting it, the simulated partial discharge signal of various types and characteristics can be freely generated by simply storing the range of the partial discharge characteristic factors of the partial discharge type and the above-mentioned algorithm in the memory.

Figure R1020150129102

Description

[0001] Apparatus and method for generating simulated partial discharge signal [0002]

To an apparatus and method for generating a simulated partial discharge signal used in a reliability test of a partial discharge diagnostic apparatus.

Power plants such as power plants and substations include various power devices such as generators, gas insulated switchgears, gas insulated transformers, and oil immersed transformers. Since a high-voltage current flows in such a power device, a partial discharge occurs as a precursor to the failure of the power device. In this way, if a partial discharge occurs in the power device, there is a possibility of reaching an insulation breakdown, and finally, the operation of the entire power equipment can be stopped. Therefore, a partial discharge diagnostic equipment for preventing the failure of the power equipment is required indispensably by diagnosing the occurrence of the partial discharge early and taking appropriate measures.

If such a partial discharge diagnostic apparatus does not operate normally, the occurrence of the partial discharge can not be accurately diagnosed, so that failure of the power supply apparatus can not be prevented. Accordingly, Korean Patent Registration No. 10-1235285 discloses an apparatus for generating the same or similar simulated signal as the partial discharge signal detected by the partial discharge diagnostic apparatus in order to test the reliability of the partial discharge diagnostic apparatus. According to Korean Patent Registration No. 10-1235285, a conventional simulated partial discharge signal generator stores data representing a partial discharge signal in the form of a matrix in the form of a memory for each type of partial discharge, loads the data from the memory Generates a signal according to the data, and adjusts the magnitude and phase of the signal to generate a simulated partial discharge signal.

Since the partial discharge signal has a very irregular and complicated waveform, when the partial discharge signal is represented by the numbers of the matrix type, the data amount becomes very large, and a very large capacity memory is required to store data expressing various partial discharge signals . Accordingly, the conventional simulated partial discharge signal generating apparatus can not generate various partial discharge signals due to the capacity limitation of the memory, and it takes much time to load vast amounts of data representing the partial discharge signals in numbers, There is a problem that the generation is not performed quickly.

In addition, the conventional simulated partial discharge signal generator needs to additionally generate a new partial discharge signal which can not be generated only by adjusting the size and phase of the signal indicated by the data stored in the memory for the reliability test of the newly introduced partial discharge diagnostic equipment The newly added partial discharge signal must be expressed in the form of a matrix of numbers and then stored in the memory. The operation of expressing the partial discharge signal by the numbers of the matrix type is very troublesome and the addition of the new type partial discharge signal itself may be impossible due to the limitation of the memory capacity.

A device and a method capable of generating a simulated partial discharge signal of various types and characteristics optimized for the reliability test of various partial discharge diagnostic apparatuses which do not require vast amounts of data for expressing a plurality of partial discharge signals, . Further, the present invention is not limited to the above-described technical problems, and another technical problem may be derived from the following description.

An apparatus for generating a simulated partial discharge signal according to an aspect of the present invention includes: an impulse forming unit for forming a pulse signal having a waveform in which impulses generated in a predetermined period are arranged by modifying a reference signal having a periodically repeated waveform; In a three-dimensional space represented by three axes of phase, magnitude, and time, the pulses of the pulse signal are modified and output so that the impulses are generated by being clustered for each constant phase interval of each period of the system AC signal, Dimensional pattern forming unit; And an algorithm for controlling a variation of the pulse of the pulse signal and a point of time of output based on the value of the partial discharge characteristic factors determined within the range of the partial discharge characteristic factors corresponding to any one of the partial discharge types among the plurality of partial discharge types Dimensional pattern forming unit. The three-dimensional pattern forming unit deforms and outputs the pulse signal under the control of the control unit.

Wherein the three-dimensional pattern forming unit comprises: a level adjusting unit for adjusting a magnitude of impulses of a pulse of the pulse signal to a magnitude level of the partial discharge signal among the partial discharge characteristic factors under the control of the controller; And controlling the phase of the partial discharge signal among the partial discharge characteristic factors based on the central phase of the partial discharge signal among the partial discharge characteristic factors in all phases of each cycle of the system AC signal according to the control of the control unit And a phase adjusting unit for outputting a wave having a magnitude adjusted by the level adjusting unit during a period in which the phase interval occurs.

Wherein the simulated partial discharge signal generating device further includes a band-pass filter for extracting a pulse to be used for generation of a simulated partial discharge signal from the pulse signal, and the level adjusting section adjusts the impulse of the pulse signal extracted by the band- Can be adjusted. Wherein the control unit determines the frequency of a pulse to be used for generating a simulated partial discharge signal in a frequency band corresponding to the partial discharge type, and the simulated partial discharge signal generating apparatus generates, from the pulse signal, And a band-pass filter for extracting a wave having a frequency determined by the band-pass filter.

Wherein the simulated partial discharge signal generator comprises an oscillation unit for generating an external reference signal having a plurality of pulses having a plurality of harmonics of different frequencies corresponding to an integer multiple of frequencies of the fundamental wave periodically repeated And the impulse forming unit may form a pulse signal having a plurality of pulses, which are impulse columns of different frequencies, by deforming each repetitive shape of each wave of the external reference signal generated by the oscillating unit into the impulse shape .

Wherein the control unit generates an internal reference signal having at least one wave of a frequency different from a frequency of a plurality of waves of an external reference signal generated by the oscillation unit by dividing or dividing a frequency of an internal clock of the control unit, The partial discharge signal generating apparatus further includes a signal selecting section for selecting either the external reference signal generated by the oscillating section or the internal reference signal under the control of the control section and the impulse forming section selecting the signal selected by the signal selecting section It is possible to form a pulse signal having a plurality of pulses, which are impulse arrays of different frequencies, by deforming each repetitive shape of each wave of the reference signal into the impulse shape.

Each of the waves of the external reference signal and each of the waves of the internal reference signal is a square wave and the impulse forming unit deforms each of the repetitive square shapes of the respective waves of the reference signal selected by the signal selecting unit to the impulse shape .

A method of generating a simulated partial discharge signal according to another aspect of the present invention is a method for generating a simulated partial discharge signal having an impulse number of a partial discharge signal among partial discharge characteristic parameters determined within a range of partial discharge characteristic factors corresponding to one of partial discharge types among a plurality of partial discharge types Controlling a frequency of a wave to be used for generation of a simulated partial discharge signal according to the simulation result; Controlling the magnitude of the impulses of the wave having the frequency according to the control according to the magnitude level of the partial discharge signal among the values of the partial discharge characteristic factors; And a controller for, during a period of time during which a phase interval having the phase width is generated centering on the central phase in all phases of each cycle of the system AC signal according to the center phase and phase width of the partial discharge signal among the values of the partial discharge characteristic factors, And controlling the output time point of the impulses of the wave having the magnitude according to the magnitude control of the impulse.

A pulse signal having a waveform in which impulses generated in a predetermined period are arranged is formed by modifying a reference signal having a periodic repetitive waveform, and a pulse signal having a waveform of a partial discharge characteristic factor determined within a range of partial discharge characteristic factors corresponding to the partial discharge type The waveform of the pulse signal is generated so that the impulses are clustered for each constant phase interval of each period of the system AC signal according to the modification of the waveform of the pulse signal and the output time point based on the value of the pulse signal, The simulated partial discharge signal of various types and characteristics can be freely generated only by storing the range of the partial discharge characteristic factors and the algorithm described above in the memory. Accordingly, it is not necessary to store a large amount of data for expressing a plurality of partial discharge signals in the memory.

It is possible to generate simulated partial discharge signals of various types and characteristics with much higher freedom than conventional ones in response to various types of partial discharge diagnostic apparatuses having various types and various performances. Therefore, a simulated partial discharge signal optimized for various partial discharge diagnostic apparatuses The reliability of various partial discharge diagnostic equipments can be more accurately tested. Particularly, since a simulated partial discharge signal generator can be manufactured using only a microcomputer having a small capacity memory and a few analog elements, a portable simulated partial discharge signal generator can be manufactured. In addition, the operation of expressing the partial discharge signal by the numbers of the matrix type disappears, and the time required for loading a large amount of data, which expresses a number of partial discharge signals, disappears, so that the generation of the simulated partial discharge signal can be performed quickly have.

In addition, since the frequency of the wave to be used for generating the simulated partial discharge signal can be freely determined within the frequency band corresponding to the partial discharge type through the multiplication or division of the internal clock, only the magnitude and phase adjustment of the signal represented by the data stored in the memory A new partial discharge signal which can not be generated can be freely generated. This makes it possible to perform a reliability test of any partial discharge diagnostic device such as a newly introduced partial discharge diagnostic device.

1 is a configuration diagram of a simulated partial discharge signal generator according to an embodiment of the present invention.
2 is a view showing a state in which an impulse line is formed by the impulse forming unit 30 shown in FIG.
3 is a diagram showing a state in which a simulated partial discharge signal is generated by the three-dimensional pattern forming unit 60 shown in FIG.
4 is an external view of a portable simulated partial discharge signal generator according to an embodiment of the present invention.
5 is a diagram showing an example of the user interface 90 shown in FIG.
FIG. 6 is a diagram showing another example of the user interface 90 shown in FIG.
7 is a flowchart of a method of generating a simulated partial discharge signal according to an embodiment of the present invention.
8 is a diagram showing an example of a simulated partial discharge signal generated by the simulated partial discharge signal generator shown in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Partial discharge refers to a discharge occurring at a local part other than between the electrodes. Examples of the discharge include a corona discharge, a floating discharge, a particle discharge, a void discharge, void discharge, surface discharge, and the like. This partial discharge is used as an index to prevent the breakdown of the power equipment because it causes the breakdown of the power equipment. It is a part to prevent the breakdown of the power equipment by early diagnosis of the partial discharge and proper measures Discharge diagnostic equipment is essential. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the invention to be described below are directed to an apparatus and method for generating a simulated partial discharge signal to test the reliability of a partial discharge diagnostic apparatus.

1 is a configuration diagram of a simulated partial discharge signal generator according to an embodiment of the present invention. 1, a simulated partial discharge signal generator according to the present embodiment includes an oscillator 10, a signal selector 20, an impulse generator 30, an amplifier 40, a band pass filter (BPF) Pass filter 50, a three-dimensional pattern forming unit 60, a wireless signal output unit 70, a wire signal output unit 80, a user interface 90, and a control unit 100. A signal selecting unit 20, an impulse forming unit 30, an amplifying unit 40, a band-pass filter 50, a three-dimensional pattern forming unit 60, a radio signal output unit 70, Each of the wired signal output units 80 is an analog component using an analog signal, while each of the user interface 90 and the control unit 100 is a digital component using a digital signal. As described below, some of the above-described analog devices are controlled by the control unit 100. [ In order for the control unit 100 to control the analog device, the digital control signal of the control unit 100 must be converted into an analog control signal recognizable by the analog device.

Accordingly, any one of the analog devices controlled by the control unit 100 and the control unit 100 has an A / D (analog / digital) conversion function for converting the digital control signal of the control unit 100 into an analog control signal shall. Among the signal lines shown in Fig. 1, a solid line represents an analog signal and a dotted line represents a digital signal. 1, a digital signal is inputted as a control signal of the control unit 100 to each analog device controlled by the control unit 100 from the control unit 100. In addition, In this way, in the embodiment shown in FIG. 1, each analog element controlled by the controller 100 has an A / D conversion function, and the controller 100 may have such an A / D conversion function. Since the characteristic of this embodiment is not related to the A / D conversion function, the analog control signal and the digital control signal are not further distinguished from each other in the following description in order to prevent the characteristic of the present embodiment from being blurred. That is, the digital control signal output by the control unit 100 is converted into an analog control signal by one of the analog devices controlled by the control unit 100 and the control unit 100, and a repetitive description thereof will be omitted .

The oscillating unit 10 generates an external reference signal having a plurality of waves having a plurality of harmonics of different frequencies corresponding to different integer multiples of the fundamental wave and the fundamental wave of a periodically changing shape. Each wave of the external reference signal generated by the oscillation unit 10 may be a square wave, a sine wave, a triangle wave, or the like . Partial discharge signals have characteristics that appear across all frequency bands, though there are some differences depending on their type. Partial discharge diagnostic equipment generally detects the occurrence of partial discharge by using signals detected in the frequency band of 500MHz to 1.5GHz. Electromagnetic waves below 500 MHz are difficult to distinguish from noise signals, and electromagnetic waves above 2 GHz can be detected only by expensive diagnostic equipment. For example, if the lowest frequency of the partial discharge signal detectable by the partial discharge diagnostic equipment is 500 MHz, the oscillation unit 10 sets any one of the waves of 10 to 500 MHz as the fundamental wave, It is possible to generate waves of various frequencies belonging to the band. As the frequency of the fundamental wave is lower, a wave having a frequency of a finer scale can be generated.

The simulated partial discharge signal output from the simulated partial discharge signal generator according to the present embodiment is applied to the partial discharge diagnostic equipment installed in various power equipment such as a generator, a gas insulated switchgear, a gas insulated transformer, an inflow transformer, It is possible to confirm whether the partial discharge diagnostic equipment operates normally. Partial discharge diagnostic equipment can diagnose the occurrence of partial discharge in a wider band than the frequency band of 500MHz to 1.5GHz or diagnose the occurrence of partial discharge in a narrower band than the frequency band of 500MHz to 1.5GHz according to its performance . Those skilled in the art will appreciate that the oscillating portion 10 may generate an internal reference signal having a plurality of waves appearing over a wider band and may generate an internal reference signal having a plurality of waves appearing over a narrower band It is understood that the reference signal may be generated.

The control unit 100 has an internal clock because it is implemented by a microcomputer including a microprocessor, a low capacity memory, and the like. The control unit 100 divides or divides the internal clock to generate waves having the same frequency as the frequency of the internal clock, a plurality of waves having different frequencies corresponding to different integer multiples of the frequencies of the internal clock, It is possible to generate an internal reference signal having a plurality of pulses having different frequencies corresponding to one-integer times. If the internal reference signal generated by the control unit 100 includes a plurality of waves generated by the oscillation unit 10, the oscillation unit 10 may not be required. However, when the internal clock of the controller 100 is used, the generation of the simulated partial discharge signal according to the present embodiment may be delayed because the internal clock of the controller 100 is distributed or divided by software. On the other hand, since the oscillation unit 10 generates a fundamental wave and a plurality of harmonics in hardware, the simulated partial discharge signal according to the present embodiment can be generated quickly, but a signal having a new frequency can not be additionally generated.

Since the internal clock of the control unit 100 is distributed or divided by software, the control unit 100 can additionally generate a signal having a new frequency. When the simulated partial discharge signal generating apparatus according to the present embodiment needs to additionally generate a simulated partial discharge signal of a new frequency suitable for the reliability test of the partial discharge diagnostic equipment due to the change of the partial discharge diagnostic equipment, Generates an internal reference signal having at least one wave having a frequency different from a frequency of a plurality of waves of an external reference signal generated by the oscillation unit 10 by dividing or dividing the frequency of the internal clock of the control unit 100 . Each wave of the external reference signal generated by the control unit 100 may be a square wave, a sine wave, a triangle wave, or the like . As described above, in this embodiment, the simulated partial discharge signal according to the present embodiment can be generated quickly by selectively using the external reference signal generated by the oscillation unit 10 and the internal reference signal generated by the control unit 100 A wave having a new frequency required to generate a partial discharge signal of a new frequency can be freely generated.

The signal selection unit 20 selects either the external reference signal generated by the oscillation unit 10 or the internal reference signal generated by the control unit 100 under the control of the control unit 100. [ When a simulated partial discharge signal of a frequency that can be generated from an external reference signal of the oscillation unit 10 is selected by the user, the control unit 100 outputs a control signal indicating an external reference signal of the oscillation unit 10, 20 receives the control signal indicating the external reference signal from the control unit 100 and selects the external reference signal output from the oscillation unit 10. [ When a simulated partial discharge signal of a frequency that can be generated from an internal reference signal of the control unit 100 is selected by the user, the control unit 100 outputs a control signal indicating an internal reference signal of the control unit 100, 20 receives the control signal indicating the internal reference signal from the control unit 100, the internal reference signal output from the control unit 100 is selected.

The impulse forming unit 30 forms a pulse signal having a waveform in which impulses generated in a predetermined period are arranged, by deforming a shape of a reference signal having a waveform of a periodic repetition outputted from the signal selecting unit 20. [ Since the reference signal input to the impulse generator 30 is either the external reference signal generated by the oscillator 10 or the internal reference signal generated by the controller 100 as described above, It is a combination of waves. When the external reference signal generated by the oscillation unit 10 is outputted from the signal selection unit 20, the impulse formation unit 30 outputs the repetitive shape of each wave of the external reference signal generated by the oscillation unit 10 And forms a pulse signal having a plurality of pulses which are impulse columns of different frequencies by being deformed into an impulse shape. When the internal reference signal generated by the control unit 100 is outputted from the signal selection unit 20, the impulse forming unit 30 outputs each of the repetitive shapes of the respective waves of the internal reference signal generated by the control unit 100 And forms a pulse signal having a plurality of pulses which are impulse columns of different frequencies by being deformed into an impulse shape.

2 is a view showing a state in which an impulse line is formed by the impulse forming unit 30 shown in FIG. 2 (a) shows an example of each wave of a reference signal, and Fig. 2 (b) shows an example of an impulse train formed from each wave of a reference signal. As described above, the impulse forming unit 30 transforms each repetitive shape of each wave of the reference signal selected by the signal selecting unit 20 into an impulse shape, thereby generating a pulse signal having a plurality of pulses which are impulse columns of different frequencies . In the present embodiment, when each wave of the external reference signal generated by the oscillation unit 10 and each wave of the internal reference signal generated by the control unit 100 is a square wave as shown in FIG. 2A, The forming unit 30 can be transformed into an impulse shape as shown in FIG. 2 (b) by differentiating each repetitive square shape of each wave of the reference signal selected by the signal selecting unit 20. [

The impulse generating unit 30 generates the absolute value of the result obtained by differentiating each repetitive shape of each wave of the reference signal selected by the signal selecting unit 20 so that the impulse generating unit 30 generates the impulse generating unit 30 at a period corresponding to half of each wave period of the reference signal Impulses can form waves of the sort listed. The impulse forming unit 30 discards the impulses having a negative magnitude among the impulses formed by differentiating each repetitive shape of each wave of the reference signal selected by the signal selecting unit 20 so that the period of each wave of the reference signal Impulses generated in the same period may form waves of the listed type. The former is preferable in that a simulated partial discharge signal can be generated quickly by forming a larger number of impulses within a short time.

The amplifying unit 40 amplifies the pulse signal formed by the impulse forming unit 30. When the intensity of the pulse signal output from the impulse forming unit 30 is weak, the band-pass filter 50 filters the pulse signal and the three-dimensional pattern forming unit 60 processes the filtered signal, Can be intervened. The amplification unit 40 amplifies the impulse generated by the impulse generator 30 so that noise can hardly be interfered in the process of the band-pass filter 50 filtering the pulse signal and the three-dimensional pattern forming unit 60 processing the filtered signal. Amplifies the pulse signal outputted from the pulse signal generating unit. The amplifying unit 40 may not be needed if the intensity of the pulse signal output from the impulse forming unit 30 is sufficient.

 The band pass filter 50 extracts a wave having a frequency determined by the controller 100 from the pulse signal amplified by the amplifier 40 under the control of the controller 100. [ As described below, the control unit 100 determines the frequency of the wave to be used to generate the simulated partial discharge signal in the frequency band corresponding to the type of the partial discharge. More specifically, the band-pass filter 50 extracts a wave having a frequency determined by the controller 100 from the pulse signal output from the amplifying unit 40 through the filter coefficient adjusted according to the control of the controller 100 . As described above, the pulse signal output from the impulse forming unit 30 is a combination of a plurality of pulses, which are impulse columns of different frequencies. That is, the band-pass filter 50 extracts a wave having a frequency determined by the control unit 100 from such a pulse signal.

The three-dimensional pattern forming unit 60 generates the three-dimensional pattern forming unit 60 in accordance with the control of the controller 100, The waveform of the pulse signal extracted by the band-pass filter 50 is modified and output so that impulses of the pulses of the pulse signal extracted by the band-pass filter 50 are generated for each section to generate a simulated partial discharge signal. The partial discharge signal has a characteristic of being generated in synchronization with the change of the system AC flowing in the power equipment. The partial discharge signal is repeatedly generated in a specific pattern in accordance with the type of impulses of a specific range in a certain phase interval of each period of each period of the system AC flowing from the specific point of the power device to the power device. Therefore, by analyzing the number of impulses generated at a specific point of the power device, the pattern of the change in the phase, and the pattern of the magnitude, it is possible to diagnose the type of the partial discharge generated at a specific point of the power device. Most of the partial discharge diagnostics devices released to date diagnose whether partial discharge is generated or not by using this principle.

Referring to FIG. 1, the three-dimensional pattern forming unit 60 includes a level adjusting unit 61 and a phase adjusting unit 62. The level adjuster 61 adjusts the magnitude of the impulses of the pulses of the pulse signal extracted by the bandpass filter 50 to the magnitude level of the partial discharge signal among the partial discharge characteristic factors under the control of the controller 100. As described below, the control unit 100 outputs the magnitude of each impulse of the pulse signal extracted by the band-pass filter 50 to the level adjusting unit 61. The level adjuster 61 adjusts the magnitude of each impulse of the pulse signal extracted by the bandpass filter 50 to the magnitude of each impulse indicated by the control signal output from the controller 100. [

The phase adjusting unit 62 adjusts the phase of the phase of the AC signal in the three-dimensional space represented by the three axes of phase, size, and time according to the control of the controller 100, A waveform having a magnitude adjusted by the level adjusting unit 61 during a time period during which a phase interval having a phase width of the partial discharge signal occurs among the partial discharge characteristic factors with the center phase of the partial discharge signal among the discharge characteristic parameters being the center Output. As described below, the control unit 100 outputs a control signal indicating the output time point of each impulse of the wave having the magnitude adjusted by the level adjusting unit 61 to the phase adjusting unit 62. The phase adjusting unit 62 outputs each impulse of the wave having the magnitude adjusted by the level adjusting unit 61 at the output timing of each impulse indicated by the control signal output from the control unit 100. [

3 is a diagram showing a state in which a simulated partial discharge signal is generated by the three-dimensional pattern forming unit 60 shown in FIG. Since the partial discharge signal is generated in the form of a cluster of a number of impulses in synchronization with the change of the system AC flowing in the power equipment, it can be expressed by defining the generation phase, generation size, and generation time of each impulse. 3, in this embodiment, in order to simulate the characteristics of the partial discharge signal, in a three-dimensional space represented by three axes of magnitude, phase, and time, a bandpass filter 50 generates modulated partial discharge signals by modifying the pulses of the pulse signals extracted by the band-pass filter 50 so that the impulses of the pulses of the pulsed signals extracted by the band-pass filter 50 are collectively generated.

The radio signal output unit 70 outputs the simulated partial discharge signal generated by the three-dimensional pattern forming unit 60 in the form of a radio signal. The wire signal output unit 80 outputs the simulated partial discharge signal generated by the three-dimensional pattern forming unit 60 in the form of a wire signal. The detailed implementation of the wireless signal output unit 70 and the wire signal output unit 80 can be performed by a technique known to those skilled in the art, so a detailed description thereof will be omitted . Since the partial discharge signal is generated in the form of an electromagnetic wave at a specific point of the power device, in order to test the reliability of the partial discharge diagnostic device, the simulated partial discharge signal generated by the three- . Meanwhile, when the sensor of the partial discharge diagnostic equipment is broken, the partial discharge diagnostic equipment normally operates when a simulated partial discharge signal in the form of a wire signal is inputted to the computer of the partial discharge diagnostic equipment. By inputting a simulated partial discharge signal in the form of a wire signal directly to the computer of the partial discharge diagnostic device without passing through the sensor of the partial discharge diagnostic device, it is possible to diagnose the failure of the sensor of the partial discharge diagnostic device.

4 is an external view of a portable simulated partial discharge signal generator according to an embodiment of the present invention. Since the simulated partial discharge signal generator shown in FIG. 1 can be implemented with several analog circuits, a microcomputer, a touch screen, and several button switches, it is mounted inside the housing as shown in FIG. 4, Can be manufactured as a discharge signal generating device. The user interface 90 generates a user signal representing the information input by the user under the control of the control unit 100 and outputs the user signal to the control unit 100. The user interface 90 converts the image content indicated by the image signal output from the control unit 100 Lt; / RTI > The user interface 90 may be implemented with a touch screen 91, a button switch 92, or the like as shown in FIG. The simulated partial discharge signal generator according to the present embodiment can be manufactured in a portable form as shown in FIG. 4 because it can be manufactured with only a few analog elements and a microcomputer having a small capacity memory.

5 is a diagram showing an example of the user interface 90 shown in FIG. The touch screen 91 shown in FIG. 4 can output a screen as shown in FIG. 5, an icon representing a void discharge, an icon representing a corona discharge, an icon representing a particle discharge, and a floating display are displayed on the touch screen 91 of the user interface 90. [ An icon indicating discharge is displayed. The user can select any one of four types of partial discharge, that is, void discharge, corona discharge, particle discharge, and floating discharge, to be input to the partial discharge diagnostic apparatus by clicking any one of the four icons displayed on the touch screen 91 The partial discharge type can be selected. For example, when the user clicks the icon indicating the void discharge, the partial discharge type corresponding to the void discharge is selected. The user interface 90 outputs a user signal indicating the partial discharge type selected by the user to the control unit 100 when one of the partial discharge types is selected by the user.

FIG. 6 is a diagram showing another example of the user interface 90 shown in FIG. The touch screen 91 shown in FIG. 4 can output a screen as shown in FIG. 5, the number of impulses ("Number"), the magnitude level ("Height") of the partial discharge signal among the partial discharge characteristic factors defining the partial discharge, the attenuation Icons indicating levels ("Atten"), center phase ("Phase"), output time ("Time") and random number generation ("RANDOM") are displayed. Here, the number of impulses of the partial discharge signal, the magnitude level, the attenuation level, and the center phase correspond to the partial discharge characteristic factors, and the output time of the partial discharge signal is the same as the simulated partial discharge signal Is output.

The user can select the values of the four partial discharge characteristic factors by sequentially clicking the increase / decrease button of the icon indicating the four partial discharge characteristic parameters displayed on the touch screen 91. [ At this time, the user interface 90 outputs a user signal indicating the values of the four partial discharge characteristic factors selected by the user. For example, the user can select the number of impulses of the partial discharge signal by clicking the increase / decrease button of the icon indicating the number of impulses of the partial discharge signal. The user interface 90 outputs a user signal indicating the number of impulses of the partial discharge signal selected by the user to the control unit 100. The user can set the output time of the partial discharge signal by sequentially clicking the increase / decrease button of the icon indicating the output time of the partial discharge signal displayed on the touch screen 91. [ At this time, the user interface 90 outputs a user signal indicating the output time of the partial discharge signal set by the user.

On the other hand, the user can cause the controller 100 to arbitrarily select the values of the five partial discharge characteristic factors by clicking on the icon indicating the random number generation displayed on the touch screen 91. When the user clicks the icon indicating the generation of the random number, the user interface 90 outputs the user signal indicating the arbitrary selection of the values of the five partial discharge characteristic factors to the control unit 100. In this case, the values of five randomly selected partial discharge characteristic factors are displayed in the data window of the icon showing five partial discharge characteristic parameters. At this time, the user may change the value displayed in the data window of the icon indicating the partial discharge characteristic parameter by clicking the increase / decrease button of the icon indicating a certain partial discharge characteristic parameter. The partial discharge characteristic factors shown in FIG. 6 are only some of the partial partial discharge characteristic factors, and depending on how the user interface 90 is designed, the total partial discharge characteristic factors may be displayed and other partial discharge characteristic factors may be displayed . The values of the partial discharge characteristic factors not shown in the user interface 90 are arbitrarily selected by the algorithm of the control unit 100. [

7 is a flowchart of a method of generating a simulated partial discharge signal according to an embodiment of the present invention. Referring to FIG. 7, the method of generating a simulated partial discharge signal according to the present embodiment is an algorithm composed of steps that are processed in a time-series manner by the control unit 100 shown in FIG. 1 as a program that can be executed in a microcomputer , And may be embodied in a microcomputer operating the program using a computer-readable recording medium. The computer readable recording medium includes a storage medium such as a magnetic storage medium (e.g., ROM, floppy disk, hard disk, etc.), optical reading medium (e.g., CD ROM, DVD, etc.).

The control unit 100 determines whether the pulse signal extracted by the band-pass filter 50 based on the value of the partial discharge characteristic factors determined within the range of the partial discharge characteristic factors corresponding to any one of the plurality of partial discharge types By controlling the signal selection unit 20, the band-pass filter 50, and the three-dimensional pattern formation unit 60 by using the algorithm for controlling the output time and the deformation type of the waveform of the waveform, So that a discharge signal can be generated. The contents described above with respect to the control unit 100 shown in Fig. 1 are also applied to a method of generating a simulated partial discharge signal to be described below.

In step 101, the controller 100 selects one of the plurality of partial discharge types according to the partial discharge type indicated by the user signal output from the user interface 90. As described above, when the user selects one of the partial discharge types using the user interface 90, the user interface 90 outputs a user signal indicating the partial discharge type selected by the user. At this time, the control unit 100 receives a user signal indicating a partial discharge type selected by the user from the user interface 90, and selects a partial discharge type among a plurality of partial discharge types according to the partial discharge type indicated by the user signal . When the user selects one of the partial discharge types, the simulated partial discharge signal generator generates partial discharge signals belonging to the partial discharge type selected by the user through the process as described below, . At this time, the partial discharge diagnostic equipment can test whether the partial discharge diagnostic equipment is abnormal by confirming whether or not to diagnose occurrence of partial discharge belonging to the partial discharge type selected by the user.

In step 102, the controller 100 determines the values of the partial discharge characteristic factors defining the specific partial discharge belonging to the partial discharge type within the range of the partial discharge characteristic factors corresponding to the selected partial discharge type. The basic partial discharge characteristic factors for defining a specific partial discharge include the number of impulses of the partial discharge signal, the magnitude level, the center phase, and the phase width. In addition to the basic partial discharge characteristic factors, additional partial discharge characteristic factors include attenuation level, phase shift amount, signal distribution degree, occurrence order, and the like of the partial discharge signal for each type of partial discharge. The basic partial discharge characteristic parameters refer to values required to define a specific partial discharge, and the additional partial discharge characteristic parameters are values required to generate a simulated partial discharge signal closer to the actual partial discharge signal. The values of these partial discharge characteristic factors may all be selected by the user or arbitrarily selected. Otherwise, the value of some of the partial discharge characteristic parameters may be selected by the user and the remaining values may be selected arbitrarily.

As described above, when the user selects a value of a partial discharge characteristic parameter using the user interface 90, the user interface 90 outputs a user signal indicating the value of the partial discharge characteristic parameter selected by the user. At this time, the controller 100 receives a user signal indicating the value of the partial discharge characteristic factor selected by the user from the user interface 90, and calculates the partial discharge characteristic factor according to the value of the partial discharge characteristic factor indicated by the user signal. The value of the argument is selected. Meanwhile, when the user arbitrarily selects the value of the partial discharge characteristic factors using the user interface 90, the user interface 90 outputs a user signal indicating an arbitrary selection of values of the partial discharge characteristic factors. At this time, the control unit 100 receives a user signal indicating an arbitrary selection of the values of the partial discharge characteristic factors from the user interface 90, and arbitrarily selects the values of the partial discharge characteristic factors as indicated by the user signal . The controller 100 can arbitrarily determine one value within a range of a partial discharge characteristic factor using a random number generation algorithm.

In step 103, the control unit 100 samples the entire phase 0 to 360 degrees of one period according to the frequency of the system AC, for example, 50 Hz or 60 Hz, in 64 or 128 units. When the impulse is output in the sampling unit corresponding to the 64-divided phase point, the resolution of the simulated partial discharge signal is lower than that of the 128-divided signal, but the simulation partial discharge The generation of the signal can be performed quickly. If the impulse is output in the sampling unit corresponding to the 128-divided phase point by dividing the whole phase 0 to 360 degrees of one cycle of the system AC by 128, the generation of the simulated partial discharge signal is delayed because the data amount is larger than 64 The resolution of the simulated partial discharge signal becomes high. It will be appreciated by one of ordinary skill in the art that sampling of 64 or 128 samples is only an example and can be sampled in different units.

 In step 104, the controller 100 sets the output time of the simulated partial discharge signal according to the output time indicated by the user signal output from the user interface 90. [ As described above, when the user sets the output time of the partial discharge signal using the user interface 90, the user interface 90 outputs the user signal indicating the output time of the partial discharge signal set by the user. At this time, the control unit 100 receives a user signal indicating the output time of the partial discharge signal set by the user from the user interface 90, and outputs the output time of the simulated partial discharge signal according to the output time indicated by the user signal . For example, the output time of the partial discharge signal may be set to 1 second, 10 seconds, or 100 seconds.

In operation 105, the controller 100 determines a frequency of a pulse to be used for generating a simulated partial discharge signal in a frequency band corresponding to the type of the partial discharge according to the number of impulses of the partial discharge signal among the values of the partial discharge characteristic factors determined in operation 102 And controls the signal selection unit 20 and the band-pass filter 50 according to the thus determined frequency so that the wave extracted by the band-pass filter 50 has a frequency corresponding to the number of impulses of the partial discharge signal. And controls the frequency of the wave to be used for generation of the discharge signal. Since the frequency of the wave to be used for generation of the simulated partial discharge signal can be freely determined only by changing the number of the impulses of the partial discharge signal as described above, the size of the signal stored in the memory and the new partial discharge The signal can also be freely generated. This makes it possible to perform a reliability test of any partial discharge diagnostic device such as a newly introduced partial discharge diagnostic device.

The control unit 100 adjusts the filter coefficient of the band-pass filter 50 so that the band-pass filter 50 generates a pulse having a frequency of a wave to be used for generation of a simulated partial discharge signal from a pulse signal having a plurality of pulses of different frequencies Can be extracted. In this embodiment, the number of impulses of the partial discharge signal may be the number of impulses generated per unit time, i.e., every second, or the number of impulses generated during the output time set in step 104. [ In the latter case, the controller 100 may calculate the number of impulses generated per unit time by dividing the number of impulses determined in step 102 by the output time.

As described above, since the impulse is formed by the impulse forming unit 30 in a cycle of a square wave or a half cycle unit, one impulse is generated for each cycle according to the frequency of the wave extracted by the band pass filter 50 . That is, since the frequency of the wave extracted by the band-pass filter 50 is the number of the impulses generated per unit time, the control unit 100 controls the frequency of the wave extracted by the band-pass filter 50, It is possible to control the number of impulses of the partial discharge signal generated according to FIG. In order to obtain a wave having a frequency corresponding to the number of impulses of the partial discharge signal determined in operation 102, a wave having the frequency equal to or twice the frequency of the reference signal output from the signal selector 20 Should be included. Accordingly, the control unit 100 determines a reference signal from which the waveform to be used for generation of the simulated partial discharge signal can be extracted from the external reference signal and the internal reference signal, and outputs the control signal indicating the determined reference signal to the signal selection unit 20 The signal selector 20 can be controlled.

In step 106, the controller 100 controls the level adjusting unit 61 of the three-dimensional pattern forming unit 60 according to the magnitude level of the partial discharge signal among the values of the partial discharge characteristic factors determined in step 102, The impulses of the wave having the frequency according to the frequency control of the wave in step 105 are controlled so that the impulses of the wave having the frequency according to the frequency control have the magnitude level of the partial discharge signal determined in step 102. [ The actual partial discharge signal has the characteristic that the impulse cluster, that is, the impulses dense each other do not have the same size, and are attenuated constantly with time or the impulse size is changed in a specific pattern. In order to generate a simulated partial discharge signal more approximate to the characteristics of the actual partial discharge signal, the controller 100 may further perform the following procedure in step 106. [

The control unit 100 controls the level adjusting unit 61 of the three-dimensional pattern forming unit 60 according to the attenuation level of the partial discharge signal among the values of the partial discharge characteristic factors determined in step 102, It is possible to control the size of the impulses having a magnitude according to the magnitude control of the impulse so that the magnitudes of the impulses having the magnitude of the impulse having the magnitude of the impulse are gradually attenuated. The control unit 100 controls the level adjusting unit 61 of the three-dimensional pattern forming unit 60 according to the signal distribution diagram of the partial discharge signal among the values of the partial discharge characteristic factors determined in step 102 to control the size of the impulse The magnitude of the impulses having a magnitude according to the magnitude control of the impulse can be controlled so that the magnitude of the impulses having the magnitude according to the magnitude of the impulse is changed according to the magnitude of the signal distribution determined at the step 102.

The actual partial discharge signal has a characteristic in which the magnitude level, the attenuation level, and the signal distribution degree of the partial discharge signal are alternately changed in a specific order and the magnitude of the impulse is changed. To simulate this point, The level adjustment unit 61 of the three-dimensional pattern forming unit 60 is controlled in accordance with the generation order of the partial discharge signals among the values of the discharge characteristic factors so that the magnitude of the partial discharge signal is reduced to the impulses having the magnitude according to the size control of the impulse, The level, the attenuation level, and the signal distribution may be alternately applied in a specific order so as to control the size of the impulses having a size according to the size control of the impulse.

The control unit 100 calculates the level of the partial discharge signal, the attenuation level, the signal distribution, and the magnitude of each impulse in accordance with the generation order, and outputs a control signal indicating the magnitude of each impulse of the wave to the level adjustment unit 61 The level adjusting unit 61 can be controlled. As described above, the control section 100 may calculate the magnitude of each impulse of the wave without considering the attenuation level of the partial discharge signal, the signal distribution diagram, and some or all of the generation order.

In step 107, the controller 100 controls the phase adjusting unit 62 of the three-dimensional pattern forming unit 60 according to the center phase and the phase width of the partial discharge signal among the values of the partial discharge characteristic factors determined in step 102, , 64 or 128 sampled in step 94 during a period in which a phase interval having a phase width determined in step 102 is generated centering on a center phase determined in step 102 in all phases of each cycle of a system AC signal generated repeatedly The output time of the impulses having the magnitude according to the magnitude control of the impulse in step 106 is controlled so that the impulses of the wave having the magnitude according to the magnitude control of the impulse in step 106 are outputted. In step 107, the controller 100 controls the output timing of the impulses of the pulse of the pulse signal to the phase width centered on the phase determined in step 91.

The actual partial discharge signal is generated in the impulse cluster, that is, the impulse generation phase is slightly generated according to the flow of time in the constant phase interval among the entire phases of the respective periods of the system AC signals repeatedly generated according to the flow of time And the impulse generating phase is shifted or changed in a specific pattern. In order to generate the simulated partial discharge signal more approximate to the characteristics of the actual partial discharge signal, the controller 100 may further perform the following procedure in step 107. [

The control unit 100 controls the phase adjusting unit 62 of the three-dimensional pattern forming unit 60 according to the phase shift amount of the partial discharge signal among the values of the partial discharge characteristic factors determined in step 102, The magnitude of the impulse is controlled in step 106 so that the impulses of the wave having the magnitude according to the magnitude control of the impulse in step 106 are outputted at the time when the phase interval shifted by the phase shift amount determined in step 102 is generated from the section It is possible to control the output timing of the impulses of the wave. The control unit 100 controls the phase adjusting unit 62 of the three-dimensional pattern forming unit 60 according to the signal distribution diagram of the partial discharge signal among the values of the partial discharge characteristic factors determined in step 102, The magnitude of the impulse size control in step 106 is controlled so that the impulses of the wave having the magnitude according to the magnitude control of the impulse in step 106 are outputted at the time when the shifted phase section occurs according to the signal distribution determined in step 102 from the section It is possible to control the output point of the impulses of the wave having the wave.

The actual partial discharge signal has a characteristic in which the phase of the impulse is changed while the central phase, phase width, phase shift amount, and signal distribution degree of the partial discharge signal alternate in a specific order. To simulate this point, Dimensional pattern forming unit 60 according to the order of generation of the partial discharge signal among the values of the partial discharge characteristic factors determined in the step of determining the center of the partial discharge signal from the phase interval according to the output control of the impulse, The phase and phase widths, the phase shift amounts, and the signal distribution degrees are applied in accordance with the generation order determined in step 102, so that the impulses of the waves having the magnitudes according to the size control of the impulse in step 106 are outputted at the time when the shifted phase section occurs It is possible to control the output time of the impulses of the wave having the magnitude according to the magnitude control of the impulse in step 106. [

The control unit 100 calculates a center phase and a phase width of a partial discharge signal, a phase shift amount, a signal distribution diagram, and an output time point of each impulse of the waveform according to the generation order, and outputs a control signal representing the output time point of each impulse of the waveform as a phase And outputs it to the adjustment unit 62 to control the phase adjustment unit 62. [ As described above, the control unit 100 may calculate the output time point of each impulse of the wave without considering the phase shift amount of the partial discharge signal, the signal distribution degree, and some or all of the generation order.

In step 108, the controller 100 determines whether the output time set in step 104 is completed. If the output time set in step 104 is not completed, the control unit 100 returns to step 105 and continuously executes steps 105 to 107 so that a simulated partial discharge signal having an impulse cluster synchronized with the system AC signal is continuously output . When the output time set in step 104 is completed, the controller 100 stops the operation of the three-dimensional pattern forming part 60 so that the output of the simulated partial discharge signal can be stopped.

8 is a diagram showing an example of a simulated partial discharge signal generated by the simulated partial discharge signal generator shown in Fig. Referring to FIG. 8, the simulated partial discharge signal generated by the simulated partial discharge signal generator shown in FIG. 1 is generated in the form of a cluster of a number of impulses in synchronization with the change of the system AC, .

According to the embodiments described above, according to the algorithm for controlling the modification time and the output time of the pulse of the pulse signal based on the value of the partial discharge characteristic factors determined within the range of the partial discharge characteristic factors corresponding to the partial discharge type Since the simulated partial discharge signal is generated by modifying the pulses of the pulse signal so that the impulses are clustered for each constant phase interval of each period of the system AC signal, It is not necessary to store vast amounts of data representing a number of partial discharge signals themselves. As a result, the work of expressing the partial discharge signal by the numbers of the matrix type disappears, and the time required for loading a large amount of data, which expresses a number of partial discharge signals, disappears, and the generation of the simulated partial discharge signal is quick .

In other words, by storing the range of the partial discharge characteristic factors of the partial discharge type and the algorithm corresponding to the method of generating the simulated partial discharge signal shown in FIG. 7 in the memory of the controller 100, the simulated partial discharge signal of various types and characteristics can be freely Can be generated. In this way, it is possible to generate simulated partial discharge signals of various types and characteristics at a much higher degree of freedom in response to various types of partial discharge diagnostic equipment having various types and various performances. Therefore, the simulated partial discharge Signal can be input, so that the reliability of various partial discharge diagnostic equipments can be more accurately tested.

The present invention has been described above with reference to preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

10 ... oscillation portion
20 ... signal selector
30 ... impulse forming portion
40 ... amplification unit
50 ... Bandpass filter
60 ... three-dimensional pattern forming portion
61 ... level adjusting unit 62 ... phase adjusting unit
70 ... wireless signal output section
80 ... wire signal output section
90 ... User Interface
100 ... controller

Claims (8)

Each wave being a square wave, a sinusoidal wave, or a triangular wave and having a plurality of harmonics of a plurality of harmonics of different frequencies corresponding to a fundamental wave of a periodically repeated shape and an integer multiple of frequencies of the fundamental wave, An impulse forming unit for forming a pulse signal having a waveform in which the impulses are arranged in a predetermined period by modifying each of the repetitive shapes of the impulses into shapes of impulses;
In a three-dimensional space represented by three axes of phase, magnitude, and time, the pulses of the pulse signal are modified and output so that the impulses are generated by being clustered for each constant phase interval of each period of the system AC signal, Dimensional pattern forming unit; And
Using an algorithm for controlling the variation of the pulse of the pulse signal and the output time point based on the value of the partial discharge characteristic factors determined within the range of the partial discharge characteristic factors corresponding to any one of the plurality of partial discharge types Dimensional pattern forming unit, and the control unit controls the three-
Wherein the three-dimensional pattern forming unit modifies the pulse signal under the control of the control unit and outputs the modified pulse signal. The method according to claim 1,
The three-dimensional pattern forming unit
A level adjuster for adjusting a magnitude of impulses of a pulse of the pulse signal to a magnitude level of a partial discharge signal among the partial discharge characteristic parameters under the control of the controller; And
And a control unit for controlling the phase of the partial discharge signal based on the center phase of the partial discharge signal among the partial discharge characteristic factors in all phases of each cycle of the system AC signal, And a phase adjusting unit for outputting a wave having a magnitude adjusted by the level adjusting unit during a time period during which the interval is generated. 3. The method of claim 2,
Further comprising a band-pass filter for extracting a wave to be used for generation of a simulated partial discharge signal from the pulse signal,
Wherein the level adjusting unit adjusts the magnitude of impulses of a pulse of the pulse signal extracted by the band-pass filter. The method according to claim 1,
Wherein the controller determines a frequency of a wave to be used to generate a simulated partial discharge signal in a frequency band corresponding to the partial discharge type,
And a band-pass filter for extracting a wave having a frequency determined by the controller from the pulse signal under the control of the controller. 5. The method of claim 4,
Further comprising an oscillation unit for generating an external reference signal having the plurality of waves,
The impulse generating unit generates a simulated partial discharge signal to generate a pulse signal having a plurality of pulses, which are impulse columns of different frequencies, by deforming each repetitive shape of each wave of the external reference signal generated by the oscillating unit into the shapes of the impulses Device. 6. The method of claim 5,
The control unit generates an internal reference signal having at least one wave of a frequency different from a frequency of a plurality of waves of an external reference signal generated by the oscillation unit by dividing or dividing the frequency of the internal clock of the control unit,
Further comprising a signal selection unit for selecting either the external reference signal generated by the oscillation unit or the internal reference signal under the control of the control unit,
The impulse generating unit generates a simulated partial discharge signal to generate a pulse signal having a plurality of pulses, which are impulse arrays of different frequencies, by deforming each repetitive shape of each wave of the reference signal selected by the signal selecting unit into the shapes of the impulses Device. The method according to claim 6,
Wherein each wave of the external reference signal and each wave of the internal reference signal is a square wave,
Wherein the impulse forming unit transforms each of the repetitive shapes of the respective waves of the reference signal selected by the signal selecting unit into the shapes of the impulses. A method of generating a simulated partial discharge signal of a control unit according to claim 1,
The frequency of the wave to be used for generation of the simulated partial discharge signal according to the number of impulses of the partial discharge signal among the partial discharge characteristic factors determined within the range of the partial discharge characteristic factors corresponding to any one of the partial discharge types among the plurality of partial discharge types ;
Controlling the magnitude of the impulses of the wave having the frequency according to the control according to the magnitude level of the partial discharge signal among the values of the partial discharge characteristic factors; And
Wherein, during a period in which a phase interval having the phase width is generated centering on the center phase in all phases of each period of the system AC signal according to the center phase and the phase width of the partial discharge signal among the values of the partial discharge characteristic factors, And controlling output timing of impulses of a magnitude having a magnitude in accordance with the magnitude control of the magnitude of the impulses.
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