Method, device, and system for acquiring phase signals to analyze partial discharge pattern

Abstract

The present invention relates to a method, a device, and a system for acquiring phase signals to analyze a partial discharge pattern. The method according to an embodiment of the present invention is a method performed in an electronic device and comprises the steps of: acquiring first and second phase signals corresponding to the start and end of one cycle from an alternating current power source; detecting partial discharge (PD) signals generated in power equipment during the interval between the acquired first and second phase signals; and analyzing a PD pattern for the detected PD signals, wherein, in the step of acquiring, the second phase signal is acquired after a predetermined time (Tth) has elapsed from the acquisition of the first phase signal.

Description

Method, device, and system for acquiring phase signals for partial discharge pattern analysis

[0001] The present invention relates to a phase signal acquisition technique for partial discharge pattern analysis, and more particularly, to a technique for minimizing the influence of external noise or harmonics, etc., in the process of acquiring a phase signal required for partial discharge pattern analysis.

[0002] Power equipment failures not only cause direct damage to loads but also impact economic losses. Therefore, technology to accurately and reliably diagnose the condition of various power equipment installed in power generation, transmission, and substation sections of the power system is essential.

[0003] For example, to diagnose the condition of various power facilities, technology can be utilized to analyze the patterns of partial discharge occurring in each facility. Partial discharge occurs in unique patterns, depending on the defect type: surface, void, floating, or corona. Analyzing these unique patterns can diagnose the cause of the fault and determine the appropriate countermeasures for the power facility.

[0004] Meanwhile, when analyzing the pattern of a partial discharge, a comparison of phase and magnitude must be performed. Accordingly, a process of acquiring a phase signal of an AC power source must be performed. To this end, a conventional phase signal acquisition method (hereinafter referred to as "prior art") uses a method of acquiring one cycle starting from a certain rising edge of an AC power source (e.g., a 60 Hz power source) to the next rising edge. Of course, the prior art can also use a method of acquiring one cycle starting from a certain falling edge to the next falling edge.

[0005] However, when using conventional technology in an environment where a lot of external noise or harmonics occur, a problem occurs in which the acquisition accuracy of phase signals such as the rising edge or falling edge of AC power is reduced.

[0006] However, the above-described content merely provides background information on the present invention and does not correspond to previously disclosed technology.

[0007] In order to solve the above-mentioned problem, the purpose of the present invention is to provide a technology for acquiring a phase signal of an AC power source required for pattern analysis of a partial discharge while minimizing the influence of external noise or harmonics, etc. during the process of acquiring the phase signal.

[0008] However, the problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0009] A method according to one embodiment of the present invention for solving the above-described problem is a method performed in an electronic device, comprising: a step of acquiring first and second phase signals corresponding to the start and end of one cycle in an AC power source; a step of detecting a partial discharge (PD) signal generated in a power facility during an interval of the acquired first and second phase signals; and a step of analyzing a PD pattern for the detected PD signal; wherein the acquiring step is performed after a predetermined time (T) after acquiring the first phase signal. th ) is used to acquire the second phase signal.

[0010] The above T th may be a time corresponding to a phase of 350° to 355° of the AC power source.

[0011] If the above AC power source has a cycle of 60 Hz, the above T thcan be between 16.2ms and 16.6ms.

[0012] If the above AC power source has a cycle of 50 Hz, the above T th can be 19.4ms to 19.8ms.

[0013] In the above acquisition step, the first and second phase signals are acquired at the rising edge of the AC power source, and after the first phase signal is acquired, the T th During the time before the rising edge is acquired, phase signal acquisition for the rising edge may not be performed.

[0014] In the above acquiring step, the first and second phase signals are acquired at the falling edge of the AC power source, and after the first phase signal is acquired, the T th During the time before the falling edge is acquired, phase signal acquisition for the falling edge may not be performed.

[0015] An electronic device according to one embodiment of the present invention includes a memory; and a processor that controls to acquire first and second phase signals corresponding to the start and end of one cycle in an AC power source using information stored in the memory, controls to detect a partial discharge (PD) signal generated in a power facility during an interval of the acquired first and second phase signals, and controls to analyze a PD pattern for the detected PD signal.

[0016] The processor acquires the first and second phase signals, and after acquiring the first phase signal, a certain period of time (T) th ) can be controlled to acquire the second phase signal after it is consumed.

[0017] The processor acquires the first and second phase signals at the rising edge of the AC power supply when acquiring the first and second phase signals, and after the first phase signal is acquired, the T th It is possible to control that the phase signal acquisition for the rising edge is not performed during the time before it is consumed.

[0018] The processor acquires the first and second phase signals at the falling edge of the AC power supply when acquiring the first and second phase signals, and after the first phase signal is acquired, the T th During the time before the falling edge is consumed, the phase signal acquisition for the falling edge can be controlled so as not to be performed.

[0019] A system according to one embodiment of the present invention includes a sensor for detecting a sensor signal for a partial discharge (PD) signal generated from a power facility; and an electronic device for acquiring first and second phase signals corresponding to the start and end of one cycle in an AC power source, detecting a PD signal from a sensor signal received from the sensor during an interval of the acquired first and second phase signals, and analyzing a PD pattern for the detected PD signal.

[0020] The electronic device acquires the first and second phase signals, and then acquires the first phase signal after a certain period of time (T th ) can be obtained after the second phase signal is acquired.

[0021] The present invention, configured as described above, has the advantage of being able to more accurately acquire the phase signal while minimizing the influence of external noise or harmonics, etc., in the process of acquiring the phase signal of an AC power source required for pattern analysis of a partial discharge.

[0022] In particular, the present invention has an advantage in that it can accurately detect a phase signal for PD pattern analysis stably not only in a temporary power failure but also in a continuous power quality degradation environment by measuring a second phase signal after a certain period of time from a first phase signal at a starting point.

[0023] The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by a person having ordinary skill in the art to which the present invention belongs from the description below.

[0024] Figure 1 shows a block diagram of a system (1) according to one embodiment of the present invention.

[0025] FIG. 2 shows a block diagram of an electronic device (300) according to one embodiment of the present invention.

[0026] Figure 3 shows a flowchart of a method according to one embodiment of the present invention.

[0027] Figure 4 shows a sine wave signal of an AC power source.

[0028] Fig. 5 shows an example of a diagram of a sine wave signal related to a problem that occurs when acquiring a phase signal of an AC power source in the prior art.

[0029] Figures 6 and 7 show an example of a diagram of a square wave signal related to the phase signal acquisition of an improved AC power source in the present invention.

[0030] Hereinafter, specific embodiments according to the present disclosure will be described with reference to the drawings. The following detailed description is provided to facilitate a comprehensive understanding of the methods, devices, and / or systems described herein. However, these are merely examples and the present invention is not limited thereto.

[0031] In describing embodiments of the present disclosure, if a detailed description of a known technology related to the present invention is judged to unnecessarily obscure the gist of the embodiments, the detailed description will be omitted. In addition, the terms described below are terms defined in consideration of their functions in the present invention, and these may vary depending on the intention or custom of the user or operator. Therefore, the definitions should be made based on the contents throughout this specification. The terminology used in the detailed description is only for the purpose of describing one embodiment and should not be limited in any way. Unless clearly used otherwise, the singular form includes the plural form. In this description, expressions such as "comprises" or "having" are intended to indicate certain features, numbers, steps, operations, elements, parts, or combinations thereof, and should not be construed to exclude the presence or possibility of one or more other features, numbers, steps, operations, elements, parts, or combinations thereof other than those described. Additionally, terms such as “part,” “unit,” “module,” and “block” described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware, software, or a combination of hardware and software.

[0032] Figure 1 shows a block diagram of a system (1) according to one embodiment of the present invention.

[0033] A system (1) according to one embodiment of the present invention (hereinafter referred to as “the system”) is a system that diagnoses the status of a power facility (100) by analyzing patterns of partial discharge (hereinafter referred to as “PD”) occurring in the power facility (100). As illustrated in FIG. 1, the system (1) includes a power facility (100), a sensor (200), and an electronic device (300).

[0034] At this time, the power equipment (100) is a power system equipment that is the subject of analysis and status diagnosis. This power equipment (100) may be equipment installed in a generation, transmission, or substation section of an ultra-high voltage power system (i.e., a power plant or substation, etc.).

[0035] For example, the power equipment (100) may include, but is not limited to, an ultra-high voltage transformer. In this case, the ultra-high voltage transformer transmits electricity produced at a power plant to a substation or transforms the transmitted high voltage electricity into an appropriate voltage for use in factories or homes. Of course, the power equipment (100) may also include a gas insulated system (GIS) or a distribution equipment diagnostic system.

[0036] In particular, ultra-high voltage transformers may be oil-immersed transformers containing insulating oil that dissipates heat generated during the transformation process. For example, the insulating oil may be filled into a housing or the like, and petroleum-based or non-flammable synthetic insulating oil may be used. Furthermore, the insulating oil may have high electrical resistance, low viscosity, and stability against oxidation.

[0037] The sensor (200) is a configuration that detects the status of the power equipment (100) and generates a sensor signal. In particular, the sensor (200) may be a sensor for detecting PD generated in the power equipment (100) and may be installed in or around the power equipment (100).

[0038] At this time, PD is a phenomenon that occurs when the dielectric is locally destroyed in the solid or liquid composition within the power equipment (100) due to a defect or deterioration caused by high voltage stress, etc. In other words, PD is a discharge phenomenon that occurs in the power equipment (100) due to a defect or deterioration of the power equipment (100). This PD occurs in the form of a specific pattern (hereinafter referred to as “PD pattern”) according to the defect or deterioration of the power equipment (100), and this PD pattern can be analyzed in the electronic device (300). For example, different first to third PD patterns may occur in the power equipment (100) depending on the PD factor. That is, a defect or deterioration of a specific component in the power equipment (100) may correspond to a PD factor that causes the PD.

[0039] At this time, the first PD pattern is a pattern for PD that occurs when an electric field is concentrated due to a defect or deterioration of a first component corresponding to a protruding conductive portion in a power facility (100). This first PD pattern may also be referred to as a protrusion pattern or a corona pattern. At this time, the first component may be a protrusion formed on a high-voltage section's protrusion or a ground section conductor. Specifically, the first component may correspond to a lead wire or a bolt fastening portion. That is, a defect or deterioration of the protruding conductive portion corresponding to the first component may correspond to a first PD factor that causes the first PD.

[0040] The second PD pattern is a pattern for PD caused by a defect or deterioration of a second component corresponding to an insulator (part) or a void in a power equipment (100). This second PD pattern may also be referred to as a surface pattern or a void pattern. In other words, a defect or deterioration of an insulator (part) or a void corresponding to a second component may correspond to a second PD factor that causes the second PD.

[0041] The third PD pattern is a pattern for PD caused by a defect or deterioration of a third component corresponding to a non-grounded conductor in a power facility (100). This third PD pattern may also be referred to as a floating pattern. At this time, the third PD pattern may be a pattern for the third PD caused by a defect or deterioration between windings, turns, or sections, caused by a loose bolt, or caused by a defect or deterioration of an On Load Tap Changer (OLTC). That is, a defect or deterioration between windings, turns, or sections, a loose bolt, or a defect or deterioration of an OLTC may correspond to the third PD factors that cause the third PD.

[0042] The sensor signal detected by the sensor (200) may include a signal for PD generated in the power facility (100). That is, the sensor (200) may detect a signal for PD generated in the power facility (100). The sensor signal including the PD signal detected in this way may be transmitted to the electronic device (300) via a wired or wireless line. Accordingly, the electronic device (300) may analyze the PD signal according to the received sensor signal to determine the type of a specific pattern (i.e., PD pattern) for the corresponding PD signal, and may infer a factor (i.e., PD factor) that generates the corresponding PD in the power facility (100) according to the determined PD pattern type.

[0043] For example, the sensor (200) may be a sensor that detects a PD signal in an ultra-high frequency (UHF) band of 300 MHz to 3 GHz, but is not limited thereto.

[0044] The electronic device (300) is a device that receives and processes a PD signal detected and transmitted by the sensor (200). At this time, the electronic device (300) controls the performance of an analysis on a partial discharge occurring in a power facility (100) based on the received PD signal, and can control a diagnosis on the status of the power facility (100) based on the analysis.

[0045] FIG. 2 shows a block diagram of an electronic device (300) according to one embodiment of the present invention.

[0046] This electronic device (300) is an electronic device capable of computing, and as illustrated in FIG. 2, may include an input unit (310), a communication unit (320), a display (330), a memory (340), and a control unit (350).

[0047] For example, the electronic device (300) may be a general-purpose computing system such as a desktop personal computer, a laptop personal computer, a tablet personal computer, a netbook computer, a workstation, a personal digital assistant (PDA), a smartphone, a smartpad, or a mobile phone, or may be a dedicated embedded system implemented based on Embedded Linux, but is not limited thereto.

[0048] The input unit (310) generates input data in response to various user inputs and may include various input means.

[0049] For example, the input unit (310) may include, but is not limited to, a keyboard, a key pad, a dome switch, a touch panel, a touch key, a touch pad, a mouse, a menu button, a sound input device, various types of sensor devices, or a photographing device.

[0050] The communication unit (320) is a component that performs communication with other devices. For example, the communication unit (320) can receive a PD signal detected by the sensor (200) and receive various data required for performing the method described below from other devices. In addition, the communication unit (300) can also transmit data regarding the results of performing the method described below to other devices.

[0051] For example, the communication unit (320) may perform wireless communication such as 5G (5th generation communication), LTE-A (long term evolution-advanced), LTE (long term evolution), Bluetooth, BLE (Bluetooth low energy), NFC (near field communication), WiFi communication, or wired communication such as cable communication, but is not limited thereto.

[0052] The display (330) displays various image data on a screen and may be configured as a non-luminous panel or an emissive panel. That is, the display (330) can display image data according to the method described below.

[0053] For example, the display (330) may include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display, an organic light emitting diode (OLED) display, a micro electro mechanical systems (MEMS) display, or an electronic paper display. In addition, the display (330) may be implemented as a touch screen or the like by being coupled with the input unit (320).

[0054] The memory (340) stores various data required for the operation of the electronic device (300). The data stored in the memory (340) may include, but is not limited to, PD signals detected by the sensor (200), information transmitted and received with other devices via the communication unit (320), information for the control operation of the control unit (350), and program information related to the method described below.

[0055] For example, the memory (340) may include, but is not limited to, volatile memory elements such as DRAM or SRAM, non-volatile memory elements such as PRAM, MRAM, ReRAM, or NAND flash memory, or hard disk drives (HDDs) or solid state drives (SSDs). In addition, the memory (14, 24) may include, but is not limited to, a cache, a buffer, a main memory, an auxiliary memory, or a separately provided storage system depending on its use / location.

[0056] The control unit (350) can perform various control operations of the electronic device (300). That is, the control unit (350) can control the execution of the method described below. In addition, the control unit (350) can control the operations of the remaining components of the electronic device (300), such as the input unit (310), the communication unit (320), the display (330), the memory (340), etc.

[0057] For example, the control unit (350) may include, but is not limited to, a hardware processor (351) or a software process executed on the processor (351). For example, the processor (351) may include, but is not limited to, a microprocessor, a central processing unit (CPU), a processor core, a multiprocessor, an application-specific integrated circuit (ASIC), or a field programmable gate array (FPGA).

[0058] Hereinafter, a method according to one embodiment of the present invention will be described in more detail.

[0059] Figure 3 shows a flowchart of a method according to one embodiment of the present invention.

[0060] A method according to one embodiment of the present invention (hereinafter referred to as “the method”) is a method performed in the present system (1), and may be performed, in particular, under the control of the control unit (350) of the electronic device (300), and may include S100 to S400, as illustrated in FIG. 3. That is, S100 to S400 may be processed by a processor or process of the control unit (350).

[0061] Fig. 4 shows a sine wave signal of an AC power source, and Fig. 5 shows an example of a diagram of a square wave signal related to a problem that occurs when acquiring a phase signal of an AC power source in the prior art. Figs. 6 and 7 show an example of a diagram of a square wave signal related to acquiring a phase signal of an AC power source improved in the present invention.

[0062] That is, Fig. 4 shows a sine wave signal of an AC power supply voltage, and Figs. 5 to 7 show square wave signals converted from the sine wave signal of the AC power supply voltage. However, Fig. 6 shows an example of detecting a phase signal of a rising edge, and Fig. 7 shows an example of detecting a phase signal of a falling edge.

[0063] First, the control unit (350) controls to acquire (detect) the phase signal of the AC power source (S100).

[0064] At this time, a phase signal corresponding to a rising edge or falling edge is detected from the AC power signal. Of course, the AC power is a commercial power applied to drive the electronic device (300) and may be a power source having a constant cycle. For example, the constant cycle may be 50 Hz or 60 Hz.

[0065] That is, as shown in FIGS. 4 to 7, the phase signal of the AC power supply can be detected by converting the sine wave signal of the AC power supply voltage into a square wave signal using a square wave generator and detecting the rising edge or falling edge of the converted square wave signal.

[0066] For example, the square wave generator may be, but is not limited to, a comparator or a PWM. At this time, the square wave signal for the AC power voltage generated by the square wave generator is a signal in which a low level and a high level are repeated for a certain period of time. For example, the low level may be 0 V, and the high level may be a voltage greater than 0 V. Accordingly, a rising edge indicates a moment when a low level changes to a high level, and a falling edge indicates a moment when a high level changes to a low level.

[0067] By detecting the gradient of such a square wave signal, rising and falling edges can be detected. For example, if there is a part in the square wave signal where the gradient increases rapidly from 0 to a certain level or more (i.e., a part with a steep positive slope), that part may correspond to a rising edge. Conversely, if there is a part in the square wave signal where the gradient decreases rapidly from 0 to a certain level or less (i.e., a part with a steep negative slope), that part may correspond to a falling edge.

[0068] Hereinafter, the case where a rising edge is detected is referred to as “case 1,” and the case where a falling edge is detected is referred to as “case 2.”

[0069] Of course, it is desirable that the phase signals corresponding to the start and end points are detected at intervals of 1 cycle.

[0070] For example, in the first case, the first phase signal of the rising edge may be detected as the starting point of one cycle, and the second phase signal of the next other rising edge that arrives after the first phase signal may be detected as the ending point of one cycle. Alternatively, in the second case, the first phase signal of the falling edge may be detected as the starting point of one cycle, and the second phase signal of the next other falling edge that arrives after the first phase signal may be detected as the ending point of one cycle.

[0071] Of course, the phase signal can be detected normally and on time when the influence of noise (N) due to external noise or harmonics is small. That is, in the first normal case, after the first phase signal with a rising edge is detected at t1, the second phase signal with a different rising edge can be detected at t1'. Or, in the second normal case, after the first phase signal with a falling edge is detected at t3, the second phase signal with a different falling edge can be detected at t3'.

[0072] However, when the influence of noise (N) is significant, the phase signal may be detected abnormally. For example, as illustrated in FIGS. 5 to 7, noise (N) due to external noise or harmonics may be added to the square wave signal. Accordingly, unlike in the normal case, the phase signals of the rising or falling edges of the starting and ending points, such as t2 and t4, may be detected abnormally, and the phase signals detected in this way have a period that is different from the phase signal that should have been originally detected.

[0073] That is, when using conventional technology in an environment where external noise or harmonics occur frequently, a problem occurs in which the acquisition accuracy of phase signals such as the rising edge or falling edge of AC power is reduced.

[0074] In particular, the phase signal for power acquired in S100 must be utilized in PD pattern analysis in S300, which will be described later. In other words, analysis of the PD pattern is possible only by comparing the magnitude and phase of the PD signal and the phase signal. However, if the acquisition accuracy of the phase signal is low due to the above-mentioned problem, not only will the accuracy of the PD pattern analysis decrease, but in severe cases, the PD pattern analysis itself may become impossible.

[0075] To solve this problem, as shown in FIGS. 6 and 7, the control unit (360) detects the first phase signal of the starting point and then, for a certain period of time (T th ) can be controlled to detect the second phase signal of the end point after it has been consumed.

[0076] That is, in the first case, as shown in Fig. 6, the first phase signal of the rising edge at t1 is detected from the voltage signal of the AC power source and selected as the starting point, and then T th During the period, the phase signal of the rising edge is not detected. However, T th After the time of t1', the second phase signal of another rising edge is detected from the voltage signal of the AC power source and selected as the end point. Accordingly, an abnormal rising edge phase signal that may be detected by noise (N) at t2 or t4, etc. between t1 and t1' may not be detected, and the first and second phase signals can be detected at more accurate timing.

[0077] Similarly, in the second case, as shown in Fig. 7, the first phase signal of the falling edge is detected from the voltage signal of the AC power supply at t3 and selected as the starting point, and then T th During the period, the phase signal of the falling edge is not detected. However, T thAfter the time of t3', the second phase signal of another falling edge is detected from the voltage signal of the AC power supply and selected as the end point. Accordingly, an abnormal falling edge phase signal that may be detected by noise (N) at t4 or t2' between t3 and t3' may not be detected, and the first and second phase signals can be detected at more accurate timing.

[0078] For example, if the AC power cycle is 60 Hz, this corresponds to approximately 16.7 ms (1 / 60 Hz), so T th It may be desirable that it be 16.4ms±0.2ms. At this time, 16.4ms±0.2ms is the time corresponding to the phase of 350° to 355° from the starting point. That is, if it takes more than 16.4ms±0.2ms from the first phase signal of the starting point, the second phase signal of the ending point is detected thereafter.

[0079] Also, if the AC power cycle is 50 Hz, this corresponds to approximately 20 ms (1 / 50 Hz), so T th It may be desirable that it be 19.6ms±0.2ms. At this time, 19.6ms±0.2ms is the time corresponding to the phase of 350° to 355° from the starting point. That is, if it takes more than 19.6ms±0.2ms from the first phase signal of the starting point, the second phase signal of the ending point is detected thereafter.

[0080] Next, the control unit (350) controls to detect a PD signal (S200).

[0081] That is, it is a step of receiving a detection sensor signal from a sensor (200) and detecting a PD signal included in the corresponding sensor signal. At this time, the PD signal is detected during the time interval of the first and second phase signals (i.e., during one cycle of the AC power supply).

[0082] At this time, the PD signal is a signal related to the PD detected by the sensor (200), and may be a signal corresponding to a case where the signal size is greater than a certain value (i.e., greater than a reference value). For example, if the signal size by the frequencies of a specific band related to the PD signal in the UHF band is greater than the reference value, it may be determined that a PD signal has been generated. That is, if a signal in a specific band has a size value greater than the reference value, the signal may be referred to as a PD signal.

[0083] Next, the control unit (350) controls to analyze the PD pattern (S300).

[0084] That is, by comparing and analyzing the magnitude and phase of the phase signal of the AC power detected in S100 and the PD signal detected for one cycle in S200, the PD pattern for the corresponding PD signal can be analyzed, thereby analyzing the PD factor.

[0085] At this time, the PD factor is a factor that generates PD in the power equipment (100). For example, the PD factor may include first to third PD factors, and different PD patterns (i.e., first to third PD patterns) may be generated depending on each PD factor. However, since the PD pattern has been described above in the present system (1), a detailed description thereof will be omitted below.

[0086] Meanwhile, in S300, an alarm may be generated based on the PD pattern analysis results. At this time, the alarm may be generated in the form of visual, auditory, or textual information. The control unit (350) may transmit a control signal for generating the alarm to an alarm device (not shown), and accordingly, the alarm device may generate an alarm in the form of visual, auditory, or textual information according to the control signal. For example, an alarm device that generates an alarm in the form of visual or textual information may include a display (330).

[0087] Meanwhile, S100 to S300 may be performed repeatedly. That is, after S100 to S300 are performed for one cycle, S100 to S300 may be performed for the next cycle. At this time, the phase signal at the end point of one cycle may correspond to the phase signal at the start point of the next cycle.

[0088] Figure 8 is a drawing for explaining the computing environment of an electronic device (300).

[0089] In the illustrated embodiment, each component may have different functions and capabilities other than those described below, and may include additional components other than those described below. The computing environment of the electronic device (300) may include one or more components, as illustrated in FIG. 8.

[0090] That is, for a computing environment, the electronic device (300) may include at least one processor (351), a memory (340), and a communication bus (373). The processor (351) may cause the electronic device (300) to operate according to the exemplary embodiment mentioned above. The processor (351) may be included in the control unit (350). For example, the processor (351) may execute one or more programs (341) stored in the memory (340). The one or more programs (341) may include one or more computer-executable instructions, and the computer-executable instructions, when executed by the processor (351), may be configured to cause the electronic device (300) to perform operations according to the exemplary embodiment.

[0091] That is, the above-described method can be executed by loading the memory (340) and executing the program (341) under the control of the processor (351) of the control unit (350). This program (341) can be stored in the memory (340) of various types of non-transitory computer-readable media. In addition, the program (341) can also be supplied by various types of transitory computer-readable media. For example, the transitory computer-readable media can include, but are not limited to, electrical signals, optical signals, and electromagnetic waves. That is, the transitory computer-readable media can supply the program (341) to the control unit (30) through a wired communication line such as an electric wire or an optical fiber, or a wireless communication line.

[0092] The communication bus (373) interconnects various other components of the electronic device (300) in addition to the processor (351) and memory (340).

[0093] The electronic device (300) may include one or more input / output interfaces (372) that provide interfaces for one or more input / output devices (372), and one or more communication interfaces (321) for a communication unit (320), etc. The input / output devices (372) may include an input unit (310) and an output unit. In this case, the output unit is configured to generate various outputs. For example, the output unit may include an output device such as a display (330), a printer, a speaker, or a network card.

[0094] The input / output interface (372) and the communication interface (321) are connected to a communication bus (373). The input / output device (372) can be connected to other components of the electronic device (300) via the input / output interface (372). The input / output device (372) can be included within the electronic device (300) as a component constituting the electronic device (300), or can be connected to the electronic device (300) as a separate device distinct from the electronic device (300).

[0095] The present invention, configured as described above, has the advantage of being able to more accurately acquire the phase signal of an AC power source required for pattern analysis of partial discharge while minimizing the influence of external noise or harmonics during the process of acquiring the phase signal. In particular, the present invention has the advantage of being able to accurately detect the phase signal for PD pattern analysis stably not only in a temporary power failure but also in a continuous power quality deterioration environment by measuring the second phase signal after a certain period of time from the first phase signal at the starting point.

[0096] While the present invention has been described in detail above through representative examples, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

[0097] The present invention relates to a phase signal acquisition technique for partial discharge pattern analysis, and can provide a technique for minimizing the influence of external noise or harmonics, etc., in the process of acquiring a phase signal required for partial discharge pattern analysis, and thus has industrial applicability.

Claims

1. A method performed in an electronic device, A step of acquiring first and second phase signals corresponding to the start and end of one cycle from an AC power source; A step of detecting a partial discharge (PD) signal generated in a power facility during the interval between the acquired first and second phase signals; and A step of analyzing a PD pattern for a detected PD signal; The above acquiring step is performed after a certain time (T) after acquiring the first phase signal. th ) A method for acquiring the second phase signal after the second phase signal is consumed.

2. In paragraph 1, The above T th is a method that corresponds to the time corresponding to the phase of 350° to 355° of the above AC power.

3. In paragraph 1, If the above AC power source has a cycle of 60 Hz, the above T th A method that is 16.2ms to 16.6ms.

4. In paragraph 1, If the above AC power source has a cycle of 50 Hz, the above T th The method is 19.4ms to 19.8ms.

5. In paragraph 1, In the above acquiring step, the first and second phase signals are acquired at the rising edge of the AC power source, and after the first phase signal is acquired, the T th A method in which phase signal acquisition for a rising edge is not performed during the time before it is consumed.

6. In paragraph 1, In the above acquiring step, the first and second phase signals are acquired at the falling edge of the AC power source, and after the first phase signal is acquired, the T th A method in which phase signal acquisition for the falling edge is not performed during the time before it is consumed.

7. Memory; and A processor is included, which controls to acquire first and second phase signals corresponding to the start and end of one cycle in an AC power source using the information stored in the above memory, controls to detect a partial discharge (PD) signal generated in a power facility during the interval of the acquired first and second phase signals, and controls to analyze a PD pattern for the detected PD signal. The processor acquires the first and second phase signals, and after acquiring the first phase signal, a certain period of time (T) th ) An electronic device that controls the acquisition of the second phase signal after the second phase signal is consumed.

8. In paragraph 7, The above T th An electronic device whose time corresponds to the phase of 350° to 355° of the AC power source.

9. In paragraph 7, If the above AC power source has a cycle of 60 Hz, the above T th An electronic device having a time of 16.2 ms to 16.6 ms.

10. In paragraph 7, If the above AC power source has a cycle of 50 Hz, the above T th An electronic device having a time of 19.4 ms to 19.8 ms.

11. In paragraph 7, The processor acquires the first and second phase signals at the rising edge of the AC power supply when acquiring the first and second phase signals, and after the first phase signal is acquired, the T th An electronic device that controls the phase signal acquisition for a rising edge to be non-performed during the time before it is consumed.

12. In paragraph 7, The processor acquires the first and second phase signals at the falling edge of the AC power supply when acquiring the first and second phase signals, and after the first phase signal is acquired, the T th An electronic device that controls the phase signal acquisition for the falling edge to be non-performed during the time before it is consumed.

13. A sensor that detects a sensor signal for a partial discharge (PD) signal generated from a power facility; and An electronic device comprising: an electronic device that acquires first and second phase signals corresponding to the start and end of one cycle from an AC power source, detects a PD signal from a sensor signal received from the sensor during the interval of the acquired first and second phase signals, and analyzes a PD pattern for the detected PD signal; The electronic device acquires the first and second phase signals, and then acquires the first phase signal after a certain period of time (T th ) A system for acquiring the second phase signal after the second phase signal is consumed.

Images