KR101538999B1 - Partial discharge diagnosis apparatus and method - Google Patents

Abstract

The present invention relates to a partial discharge diagnosis apparatus and method capable of automatically recognizing a frequency-specific module which performs various types of diagnosis methods that satisfies each characteristic partial discharge diagnosis process to diagnose a partial discharge suitable for the recognized module. A replaceable, frequency-specific module unit receives a partial discharge signal from an antenna capable of detecting a frequency-specific partial discharge signal. A main device unit determines whether a partial discharge has occurred from the partial discharge signal received by the replaceable, frequency-specific module unit, and processes the partial discharge signal to diagnose whether a partial discharge has occurred, as well as the level, location, and type of the partial discharge. Then the device measures a peak hold.

Description

[0001] Partial discharge diagnosis apparatus and method [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partial discharge diagnosis apparatus and method, and more particularly, to a partial discharge diagnosis apparatus and method for performing a preventive diagnosis for a power transmission facility.

Power facilities require very high reliability in view of the industrial and economic ripple effects on the entire power system. In particular, it is essential to predict and diagnose faults to improve reliability. Since an accident caused by a partial discharge in a power facility has a characteristic that a response is quicker than other signs in the occurrence of an abnormal condition, a partial discharge generated in the power facility is immediately detected, Prevention or reduction.

In the case of transformers, the capacity and power of the substation and power plants are becoming unmanned due to the increase in capacity and the increase in the power demand. Since such a large-capacity and high-voltage transformer is important for safety, the partial discharge diagnosis device always monitors the abnormalities of the electric power facilities at the substations so as to promptly diagnose abnormalities and alarms that are rapidly progressing, And prevent massive industrial losses and psychological anxiety. In other words, a partial discharge diagnosis device is installed in the electric power facility to diagnose a partial discharge (PD) caused by insulation deterioration, thereby preventing short-circuiting and short-circuiting accidents due to insulation deterioration. In this case, There are various types of diagnosis such as ultrasonic measurement technique, gas analysis technique, UHF analysis technique and the like.

Korean Patent No. 10-1007629 (Registered on May 1, 2011) discloses a wireless ultrasonic sensor for use in a power facility diagnosis using a magnetic field, and an apparatus and method for real-time monitoring of insulation deterioration of a power facility using the same. A wireless power supply module for generating a power using a magnetic field and measuring the partial discharge signal generated by the deterioration as a power source; An ultrasonic transducer for measuring a partial discharge signal generated due to insulation deterioration in a power facility; A preamplifier for amplifying the partial discharge signal measured by the ultrasonic probe; An analog to digital converter (ADC) for converting the amplified sensor output voltage of the analog type output from the preamplifier into a digital signal; A controller for controlling the analog digital converter and the local communication module to store the partial discharge measurement information converted into the digital information, and sending the stored partial discharge measurement information to the local communication module; And a short range communication module for transmitting the measured partial discharge signal data received through the controller to the outside via wireless communication. The wireless power supply module is configured to transmit a peripheral magnetic field generated by an electromagnetic induction phenomenon from a live- A Rectenna for converting the signal to a signal; And a lithium ion rechargeable battery (Li-ion battery) charged from the rectenna when the electric power facility is in a live state for provisional power supply in a non-live state. According to the disclosed technology, by using a magnetic field generated in a live electric power facility for the operation of an ultrasonic sensor installed in a power facility to diagnose insulation deterioration characteristics, the ultrasonic sensor installed in the electric power facility can be operated semi-permanently It is not necessary to worry about the twist of the wiring when the ultrasonic sensor is installed and it is possible to prevent the operator who is caused by the high voltage or extra high voltage current It is possible to prevent a safety accident such as an electric shock of the ultrasonic sensor and the digital conversion means by using the ultrasonic sensor having the wireless network transmission means and the digital conversion means itself so that the sensor cable twist and the external noise inflow And solve various problems in various locations within a power plant. By wheat measurement it is possible and the measurement of the information is immediately converted into a digitized information after the wireless transmission is possible to the real-time monitoring.

Korean Registered Patent No. 10-1181713 (registered on Aug. 31, 2012) discloses a hybrid structure of an ultrasound-type PD detection module and an electromagnetic-wave PD detection module, through which a surface partial discharge and an internal partial discharge of a transformer- And a PD diagnosis method for the substation power distribution facility through the hybrid PD detector. According to the disclosed technology, an ultrasonic wave is shot on the surface of a transformer distribution apparatus to sense partial discharge (PD) of the surface, and electromagnetic pulse pulses are flowed inward from the surface of the transformer distribution apparatus to sense internal partial discharge And the sensing value of the surface partial discharge and the internal partial discharge is displayed on the screen.

Since the conventional partial discharge diagnosis apparatus described above has been made as a preventive diagnostic apparatus only by dedicated apparatuses such as a narrow-band system, a broadband system, an acoustic system, and an OLTC system, It is not possible to recognize the diagnosis method of various kinds of partial discharge diagnostic apparatuses. Therefore, when the necessary modules are installed according to the field, the partial discharge detection, analysis and judgment processing suitable for the installed modules can not be executed immediately. It is difficult to construct an excellent equipment in diagnosis safety.

Korean Patent No. 10-1007629 Korean Patent No. 10-1181713

According to an aspect of the present invention, there is provided a method for diagnosing a partial discharge of each feature, the method comprising the steps of: A partial discharge diagnostic apparatus and method for diagnosing a proper partial discharge are provided.

According to an aspect of the present invention, there is provided an interchangeable frequency-division module for receiving a partial discharge signal from an antenna capable of detecting a partial discharge signal by frequency, And a controller for determining whether a partial discharge is generated from the partial discharge signal received by the interchangeable frequency-dependent module unit, diagnosing whether the partial discharge is generated, processing the partial discharge signal, diagnosing the size, position, A partial discharge diagnostic apparatus including a device unit is provided.

In one embodiment, the interchangeable frequency-dependent module section includes a plurality of signal detection modules for detecting partial discharge signals for respective frequencies of the partial discharge signals received via the antenna, And detecting a partial discharge signal having a frequency corresponding to each of the partial discharge signals, and outputting the detected partial discharge signal to the main apparatus unit.

In one embodiment, the interchangeable frequency-dependent module unit is provided with a plurality of UHF, VHF, HF, and AE band-specific meter reading sensors attached to a power facility according to a predetermined system, And a partial discharge frequency characteristic module for detecting the partial discharge signal having the partial discharge frequency characteristic.

In one embodiment, the interchangeable frequency-dependent module unit includes a plurality of amplifiers for receiving and amplifying the partial discharge signals detected by the respective metering sensors, and a plurality of amplifiers for amplifying the partial discharge signals amplified by the respective amplifiers, And a plurality of filters for filtering the input signal.

In one embodiment, the interchangeable frequency-dependent module portion includes a UHF module having an output frequency band of 300 MHz to 3000 MHz, a VHF module having a detection frequency band of 30 MHz to 300 MHz, an HF module having a detection frequency band of 3 MHz to 30 MHz, And an AE module having a frequency band of 50 KHz to 300 KHz.

In one embodiment, the interchangeable frequency-dependent module unit has an individual ID for each signal detection module, and when replacing each signal detection module, To the device unit.

In one embodiment, the main unit determines whether a partial discharge is generated using the partial discharge signal received in the interchangeable frequency-dependent module unit, and analyzes the partial discharge signal received in the interchangeable frequency- Frequency module unit, detects a replacement signal detection module in the replaceable frequency-dependent module unit, receives a power supply frequency, and receives a signal received from the replaceable frequency-dependent module unit A data acquisition processor for performing a peak hold on a discharge signal; A partial discharge generation confirmation algorithm corresponding to a feature of each partial discharge signal frequency is provided to the data acquisition processor, and a peak hold partial discharge A main processor for receiving a signal and measuring a peak hold; And a power block for generating a power supply frequency and supplying the generated power supply frequency to the data acquisition processor.

In one embodiment, the main device unit further includes an A / D converter for converting the analog partial discharge signal received by the replaceable frequency-dependent module unit into a digital partial discharge signal.

In one embodiment, the data acquisition processor identifies characteristics of the partial discharge signal frequency of the replaceable frequency-dependent module unit, and detects the occurrence of the partial discharge by the partial discharge occurrence confirmation algorithm corresponding to the identified characteristic of the partial discharge signal frequency And a signal data measuring unit for outputting the determined result to the main processor as an event signal.

In one embodiment, the data acquisition processor automatically recognizes the partial discharge detection module at the time of replacing the partial discharge detection module in the replaceable frequency-dependent module unit, and automatically generates a partial discharge occurrence confirmation algorithm for the partial discharge diagnosis from the main processor And a module detection unit that is selectively provided.

In one embodiment, the data acquisition processor receives the individual ID corresponding to the replaced module from the replaceable frequency-dependent module unit, detects the module replacement state, and automatically switches to the partial discharge detection mode corresponding to the replaced module .

In one embodiment, the data acquisition processor separates the partial discharge signal received by the interchangeable frequency-dependent module unit into a positive (+) region and a negative (-) region, The phase maximum value is detected for each signal on the dual path and the analog signal is converted into a digital signal through the A / D converter while maintaining the detected maximum value, thereby calculating a partial discharge parameter , A partial discharge signal which divides the calculated parameters into partial discharge measurement data by size and partial discharge measurement data by phase to form a partial discharge signal database and determines the state of the electric power facility by using a two- And a peak hold unit for generating a signal as a signal and outputting the signal to the main processor.

According to another aspect of the present invention, there is provided a method comprising: transmitting an individual ID of a module to which the replaceable frequency-dependent module unit is replaced when replacing the frequency-dependent module in the replaceable frequency- A main unit receiving the individual ID to detect a module replacement state and automatically switching to a partial discharge detection system corresponding to the replaced module; Receiving a partial discharge signal from an antenna capable of detecting an interchangeable frequency-dependent module added partial discharge signal by frequency; And a step of determining whether a partial discharge is generated from the received partial discharge signal and processing the partial discharge signal to diagnose whether or not partial discharge has occurred, Thereby providing a discharge diagnosis method.

According to the present invention, it is possible to automatically recognize a frequency-dependent module for performing diagnosis of various types by partial discharge diagnosis for each characteristic and to diagnose a partial discharge suitable for the recognized module, It is possible to execute the partial discharge detection, analysis and judgment process corresponding to the mounted module immediately, and it is possible to use it as a preventive diagnosis of a partial discharge in a power substation in a wide range, and to construct a device excellent in reliability and diagnosis safety .

1 is a view for explaining a partial discharge diagnosis apparatus according to an embodiment of the present invention.
2 is a flowchart illustrating a partial discharge diagnosis method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

Meanwhile, the meaning of the terms described in the present invention should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A partial discharge diagnosis apparatus and method according to an embodiment of the present invention will now be described in detail with reference to the drawings.

1 is a view for explaining a partial discharge diagnosis apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the partial discharge diagnosis apparatus 100 includes an interchangeable frequency-dependent module unit 110 and a main device unit 120.

The interchangeable frequency-dependent module unit 110 receives the partial discharge signal from the antenna capable of detecting the partial discharge signal by frequency, and transmits the partial discharge signal to the main device unit 120.

In one embodiment, the interleaved frequency-dependent module 110 is configured to receive a frequency of a partial discharge signal (e.g., Ultra High Frequency (UHF), Very High Frequency (VHF), High Frequency (HF) (Frequency of AE (Acousic Emission) band), and each of the signal detecting modules 111 to 114 may be provided with a plurality of signal detecting modules 111 to 114 It is possible to detect a partial discharge signal having a frequency corresponding to each of them and output the detected partial discharge signal to the main device unit 120. [

In one embodiment, the interchangeable frequency-dependent module unit 110 is provided with a plurality of UHF, VHF, HF, and AE band-specific meter reading sensors attached to a power facility according to a predetermined system, Each of the partial discharge frequency characteristic modules 111 to 114 for detecting a partial discharge signal having a frequency corresponding to each of the partial discharge frequency characteristics may be provided through the plurality of sensors 113. At this time, A plurality of filters (not shown in the drawing for the sake of convenience of explanation) and a plurality of filters for selectively filtering the partial discharge signals amplified by the respective amplifiers for each set frequency band ).

In one embodiment, the replaceable frequency-dependent module unit 110 includes a UHF module 111 having a detection frequency band of 300 MHz to 3000 MHz, a VHF module 112 having a detection frequency band of 30 MHz to 300 MHz, An HF module 113 having a frequency of 3 MHz to 30 MHz, and an AE module 114 having a detection frequency band of 50 KHz to 300 KHz.

In one embodiment, the interchangeable frequency-dependent module unit 110 is implemented such that each frequency-specific module 111 to 114 (different measurement frequency ranges) has a separate ID (i.e., a unique number) (I.e., a unique number) of the replaced modules 111 to 114 when the star modules 111 to 114 are replaced.

The main unit 120 receives the partial discharge signal transmitted from the interchangeable frequency-dependent module unit 110, determines whether a partial discharge is generated from the received partial discharge signal, processes the partial discharge signal Size, position, kind, etc. of the partial discharge, and also measures the peak hold.

In one embodiment, the main device unit 120 may include a data acquisition processor 121, a main processor 122, and a power block 123.

In one embodiment, the main device unit 120 receives the analog partial discharge signal (i.e., the analog partial discharge signal filtered by each filter) transmitted from the replaceable frequency-dependent module unit 110, An A / D converter (not shown in the drawing for convenience of explanation) for converting a discharge signal into a digital partial discharge signal.

The data acquisition processor 121 performs the partial discharge processing on the partial discharge detected by the interchangeable frequency-dependent module unit 110 (i.e., the UHF module 111, the VHF module 112, the HF module 113, the AE module 114, Size, position, and type of the partial discharge by analyzing the partial discharge signal received by the interchangeable frequency-dependent module unit 110, Frequency module unit 110 detects the replaced partial discharge detection modules 111 to 114 and supplies power (that is, power source frequency) from the power block 123 to the main processor 122, And performs a peak hold function on the partial discharge signal received by the replaceable frequency-dependent module unit 110 to deliver the peak-held partial discharge signal to the main processor 122.

In one embodiment, the data acquisition processor 121 may further include a signal data measurement unit, which may include an alternate frequency-dependent module unit 110 (i.e., a UHF module 111, a VHF module 112, , The HF module 113, the AE module 114, and the like) of each partial discharge signal frequency is checked, and a partial discharge generation confirmation algorithm (for example, partial discharge signal (E.g., measuring the number of pulses having a voltage level equal to or greater than a predetermined threshold), and output the determined result to the main processor 122 as an event signal.

In one embodiment, the data acquisition processor 121 may further include a module detection unit, which automatically recognizes the partial discharge detection module when replacing the partial discharge detection module in the replaceable frequency-dependent module unit 110, It is possible to automatically select and provide a detection method (that is, a partial discharge generation confirmation algorithm) necessary for diagnosis, from the main processor 122. Accordingly, when the necessary modules 111 to 114 are installed according to the field, 111 to 114), it is possible to immediately execute the processing of partial discharge detection, analysis, and judgment.

In one embodiment, the data acquisition processor 121 receives the replacement modules 111 to 114 from the replaceable frequency-dependent module unit 110 at the time of replacement of the partial discharge detection module in the replaceable frequency- (I.e., a unique number) corresponding to the modules 111 to 114, and can automatically detect the module replacement state and automatically switch to the partial discharge detection method corresponding to the replaced modules 111 to 114. [

In one embodiment, the data acquisition processor 121 may further include a peak hold portion, and the peak hold portion performs a peak hold function in which the partial discharge signal transmitted from the interchangeable frequency- (+) Region and a negative (-) region, separates each separated partial discharge signal into a double path again, detects a phase maximum value for each signal on the dual path, And converts the analog signal to a digital signal through the A / D converter while calculating the partial discharge parameter. The calculated parameter is divided into partial discharge measurement data for each size and partial discharge measurement data for each phase, And generates a partial discharge signal capable of determining the state of the electric power facility as a two-dimensional / three-dimensional graph based on the database, .

In one embodiment, the data acquisition processor 121 detects and maintains a maximum value at intervals of 1 [deg.] On a single path, and converts the analog signal into a digital signal for A / D sampling, The maximum value of the phase interval (ie, 1 ° interval) can be obtained and sampled using peak hold and A / D conversion (Peak-Hold and Analog to Digital Converter) have.

In one embodiment, the data acquisition processor 121 separates the partial discharge signal transmitted from the interchangeable frequency-dependent module unit 110 into two double paths, The maximum value of the partial discharge signal can be obtained by using the A / D converter. At this time, a predetermined period 360 ° based on the power source frequency supplied from the power block 123 is set to 360 (1 unit per unit interval), and detects and maintains a maximum value every 1 degree of the corresponding divided section in accordance with the detected phase, converts the analog signal into a digital signal, On the phase axis. In other words, the data acquisition processor 121 performs the above-described operation at the time of 1 deg., 3 deg., 5 deg., And so on in the signal on the first path, 2 °, 4 °, 6 °, ..., and so on.

The main processor 122 receives the diagnosis result (or event signal) from the data acquisition processor 121 and stores the diagnostic data. The main processor 122 performs a partial discharge generation confirmation algorithm corresponding to the characteristics of the partial discharge signal frequency, 121, and receives a peak hold partial discharge signal transmitted from the data acquisition processor 121 to measure a peak hold.

The power block 123 generates a power source (i.e., power source frequency) for performing the peak hold function and supplies the power source to the data acquisition processor 121.

The partial discharge diagnostic apparatus 100 having the above-described configuration modulates the frequency-dependent detection function of the partial diagnosis feature to provide a frequency-dependent module 111 The data acquisition processor 121 automatically recognizes the outputs of the modules 111 to 114 and diagnoses partial discharges corresponding to the recognized modules 111 to 114 so that the modules 111 to 114 are classified by themselves into any detection method The partial discharge can be diagnosed and the partial discharge detection, analysis, and judgment processing suitable for the installed modules 111 to 114 can be executed immediately when the necessary modules 111 to 114 are installed according to the field, It can be widely used in substation for preventive diagnosis of partial discharge, and it is convenient to construct equipment with excellent reliability and diagnostic safety.

The partial discharge diagnostic apparatus 100 having the above-described configuration modulates the functions of the different characteristic functions for detecting the partial discharge preventive diagnostic signal and outputs the modules to various It is possible to easily replace the detected signal module by making it possible to replace the detection method for each characteristic of the branching phenomenon by module. Also, the module automatic recognition for the partial discharge diagnosis, the detected signal analysis algorithm, It is possible to diagnose whether or not the partial discharge has occurred, the size, the position, and the type.

2 is a flowchart illustrating a partial discharge diagnosis method according to an embodiment of the present invention.

Referring to FIG. 2, signal detecting modules 111 to 114 for detecting partial discharge signals for frequencies (for example, UHF, VHF, HF, and AE band frequencies) of partial discharge signals received through an antenna Frequency module unit 110 according to the present invention. At this time, according to a predetermined method, the UHF, VHF, HF, and AE bands are attached to the electric power facility, and a partial discharge signal having a frequency corresponding to each of the sensors is detected Frequency modules 111 to 114 for each of the partial discharge frequency characteristics are provided in the interchangeable frequency-dependent module unit 110. FIG.

Each of the frequency-dependent modules 111 to 114 (different measurement frequency ranges) has the individual ID (i.e., unique number), and the frequency-dependent modules 111 to 114 are replaced Frequency module unit 110 transfers the individual IDs (i.e., unique numbers) of the replaced modules 111 to 114 to the main device unit 120 (S201).

The main device unit 120 detects the replaced partial discharge detection modules 111 to 114 in the replaceable frequency-dependent module unit 110. [ At this time, in the module detection unit provided in the data acquisition processor 121 of the main device unit 120, when replacing the partial discharge detection module in the replaceable frequency-dependent module unit 110, (I.e., a unique number) corresponding to the modules 111 to 114 that have been replaced from the corresponding modules 111 to 114 and detects the module replacement state by itself and sets the partial discharge detection mode corresponding to the replaced modules 111 to 114 (S202).

In the above-described step S202, the data acquisition processor 121 automatically recognizes the partial discharge detection module at the time of replacing the partial discharge detection module in the replaceable frequency-dependent module unit 110 and detects a detection method (that is, Generation confirmation algorithm) to the main processor 122. The main processor 122 receives the request from the data acquisition processor 121 and provides the data acquisition processor 121 with a partial discharge generation confirmation algorithm corresponding to the characteristic of the partial discharge signal frequency. Then, the data acquisition processor 121 can automatically receive the partial discharge generation confirmation algorithm provided from the main processor 122, and accordingly, when the necessary modules 111 to 114 are installed according to the field, It is possible to immediately execute the processing of partial discharge detection, analysis, and judgment corresponding to the modules 111 to 114. [

After the partial discharge detection method is automatically switched in step S202, the interchangeable frequency-dependent module unit 110 receives the partial discharge signal from the antenna capable of detecting the partial discharge signal on a frequency-by-frequency basis, To the main device unit 120 (S203).

In the above-described step S203, the replaceable frequency-dependent module unit 110 can detect the partial discharge signal having the frequency corresponding to each of the signal detecting modules 111 to 114, And can output the discharge signal to the main device unit 120. At this time, the replaceable frequency-dependent module unit 110 receives and amplifies the partial discharge signals detected by the respective meter probe through the respective amplifiers, and outputs the partial discharge signals amplified by the corresponding amplifiers through the respective filters to the set frequency And can be selectively filtered by each band.

In step S203, the UHF module 111 of the interchangeable frequency-dependent module unit 110 can detect the partial discharge signal having the frequency band of 300 MHz to 3000 MHz. The UHF module 111 of the interchangeable frequency- The VHF module 112 can detect a partial discharge signal having a frequency band of 30 MHz to 300 MHz and the HF module 113 of the interchangeable frequency-dependent module unit 110 can detect a partial discharge signal having a frequency band of 3 MHz to 30 MHz And the AE module 114 of the interchangeable frequency-dependent module unit 110 can detect the partial discharge signal having the frequency band of 3 MHz to 30 MHz.

When the partial discharge signal is detected and transmitted in the above-described step S203, the main unit 120 receives the partial discharge signal transmitted from the interchangeable frequency-dependent module unit 110, And then processes the input partial discharge signal to diagnose whether the partial discharge has occurred, size, position, type, etc. (S204)

In the above-described step S204, the A / D converter provided in the main device unit 120 receives the analog partial discharge signal (that is, the analog partial discharge signal filtered by each filter) And converts the received analog partial discharge signal into a digital partial discharge signal.

The data acquisition processor 121 provided in the main device unit 120 may be configured to receive the interchangeable frequency-dependent module unit 110 (i.e., the UHF module 111, the VHF module 112, the HF module 112, Frequency module unit 110 by using the partial discharge signal detected by the partial discharge signal detecting unit 113, the AE module 114, and the like) Size, position, and type of the diagnosis result, and may transmit the diagnosis result to the main processor 122. [ The main processor 122 receives the diagnosis result from the data acquisition processor 121 and stores the diagnostic data. In addition, the main processor 122 may provide the stored diagnostic data to the operator through a display means such as an LCD or the like, a voice output means such as a speaker, and the like.

The UHF module 111, the VHF module 112, and the HF module 113 (that is, the UHF module 111, the VHF module 112, and the HF module 113) ), The AE module 114, etc.) of each partial discharge signal frequency and confirms the characteristics of the partial discharge signal frequency according to the confirmed partial discharge signal frequency characteristic (for example, the partial discharge signal has a predetermined threshold (E.g., by measuring the number of pulses having a voltage level equal to or greater than a threshold value), and output the determined result to the main processor 122 as an event signal. The main processor 122 may receive the event signal from the data acquisition processor 121 and store and manage the event.

The power block 123 generates a power source (i.e., a power source frequency) for performing the peak hold function and supplies the generated power source to the data acquisition processor 121 (S205).

The data acquisition processor 121 measures the peak hold when the power supply frequency is supplied in step S205. When the power supply 123 receives the power (that is, the power supply frequency) 110, and delivers the peak-held partial discharge signal to the main processor 122. The main processor 122 receives the peak hold partial discharge signal transmitted from the data acquisition processor 121 and measures the peak hold (S206).

In the above-described step S206, the peak hold unit included in the data acquisition processor 121 performs a peak hold function. The partial discharge signal transmitted from the replaceable frequency-dependent module unit 110 is divided into a positive And separates the separated partial discharge signals into a double path again. The phase maximum value is detected for each signal on the dual path, and A D converter converts the analog signals to digital signals to calculate partial discharge parameters. The calculated parameters are divided into partial discharge measurement data by size and partial discharge measurement data by phase to convert the partial discharge signals into a database, Based on a two-dimensional / three-dimensional graph, a partial discharge signal that can determine the state of the electric power facility, and outputs the partial discharge signal to the main processor 122 Can. Accordingly, the main processor 122 can receive the partial discharge signal transmitted from the data acquisition processor 121 and determine the state of the electric power facility.

In the above-described step S206, the peak hold unit detects and holds the maximum value at intervals of 1 DEG on a single path, and converts the analog signal into a digital signal to perform A / D sampling. At this time, It is possible to obtain a maximum value of a corresponding phase interval (i.e., an interval of 1 deg.) By using a peak hold and an A / D conversion (Peak-Hold and Analog to Digital Converter) method.

In the above-described step S206, the peak hold part separates the partial discharge signal transmitted from the interchangeable frequency-dependent module part 110 into two double paths and receives the maximum value of each phase alternately on each path The maximum value of the partial discharge signal can be obtained by using an A / D converter, that is, by setting an arbitrary phase at a power supply frequency supplied from the power block 123, The maximum value can be detected and maintained at intervals of 1 degree on the path, and the analog signal can be converted into a digital signal to perform A / D sampling.

In the above-described step S206, the peak hold section divides one predetermined period 360 deg. Based on the power supply frequency supplied from the power block 123 into 360 unit sections (1 deg. Every unit section) predetermined on the phase axis Detects and maintains a maximum value for each divided unit of 1 deg. In accordance with the detected phase, and converts the analog signal into a digital signal, which can be alternately performed on the phase axis for each signal on the dual path. In other words, the peak hold section performs the above-described operation at the time of 1 °, 3 °, 5 °, ... in the signal on the first path, and 2 ° and 4 ° , 6 [deg.], ..., and so on.

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented by a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded, And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

100: Partial discharge diagnostic device
110: Replacement type frequency-dependent module part
111: UHF module
112: VHF module
113: HF module
114: AE module
115: main unit unit
121: Data acquisition processor
122: main processor
123: Power block

Claims (5)

A plurality of signal detection modules for detecting partial discharge signals for each frequency of a partial discharge signal received through an antenna capable of detecting partial discharge signals by frequency, Frequency module unit for detecting a partial discharge signal having a frequency that is lower than a predetermined frequency and outputting the detected partial discharge signal to the main apparatus unit; And
Frequency module unit to determine whether a partial discharge is generated by using the partial discharge signal received by the interchangeable frequency-dependent module unit, analyze the partial discharge signal received by the interchangeable frequency-dependent module unit, Frequency module unit, detects the replaced signal detection module in the replaceable frequency-dependent module unit, receives peak-hold data for the partial discharge signal received by the replaceable frequency-dependent module unit And a partial discharge generation confirmation algorithm corresponding to a characteristic of the partial discharge signal frequency to the data acquisition processor, A main processor for receiving a held partial discharge signal and measuring a peak hold, And a power block for generating a number of data and supplying the data to the data acquisition processor,
Frequency module unit has an individual ID for each of the signal detection modules and transmits an individual ID of a signal detection module that is replaced when the signal detection modules are replaced to the main unit,
The data acquisition processor of the main device unit automatically recognizes the signal detection module when replacing the module for signal detection in the interchangeable frequency module unit and automatically selects a partial discharge occurrence confirmation algorithm required for partial discharge diagnosis from the main processor And a module receiving unit for receiving the individual ID corresponding to the replaced module from the module for each frequency of the interchangeable type and automatically recognizing the ID to detect a module replacement state and automatically switching to a partial discharge detection system corresponding to the replaced module The partial discharge diagnosis apparatus comprising:











delete delete delete delete

Images