KR101789900B1 - Partial discharge measurement apparatus, partial discharge measurement method, and program - Google Patents

Partial discharge measurement apparatus, partial discharge measurement method, and program Download PDF

Info

Publication number
KR101789900B1
KR101789900B1 KR1020157029848A KR20157029848A KR101789900B1 KR 101789900 B1 KR101789900 B1 KR 101789900B1 KR 1020157029848 A KR1020157029848 A KR 1020157029848A KR 20157029848 A KR20157029848 A KR 20157029848A KR 101789900 B1 KR101789900 B1 KR 101789900B1
Authority
KR
South Korea
Prior art keywords
partial discharge
detection signal
phase
charge
alternating current
Prior art date
Application number
KR1020157029848A
Other languages
Korean (ko)
Other versions
KR20160058723A (en
Inventor
야스오 사카구치
고지 우라노
모리타카 히가시
다케루 이시이
Original Assignee
스미토모 덴키 고교 가부시키가이샤
에스이 테크놀로지 리미티드
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 스미토모 덴키 고교 가부시키가이샤, 에스이 테크놀로지 리미티드 filed Critical 스미토모 덴키 고교 가부시키가이샤
Publication of KR20160058723A publication Critical patent/KR20160058723A/en
Application granted granted Critical
Publication of KR101789900B1 publication Critical patent/KR101789900B1/en

Links

Images

Classifications

    • 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
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
    • G01R19/0053—Noise discrimination; Analog sampling; Measuring transients
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/02—Measuring characteristics of individual pulses, e.g. deviation from pulse flatness, rise time or duration
    • 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

Abstract

A partial discharge measuring apparatus for measuring a partial discharge occurring in an electric power facility, comprising: a measuring unit for measuring an alternating current flowing in the electric power facility and outputting a voltage value based on the alternating current as a detection signal; A distribution for generating distribution data showing a distribution of occurrence frequency per unit time of the electric charge obtained from the measurement of the alternating current obtained by the phase and the electric charge obtained in the phase and the phase of the electric current or voltage of the high voltage, And a data generating section for generating a trigger signal when the alternating current satisfies an output condition based on at least one of the phase, the charge, and the occurrence frequency corresponding to the partial discharge in the distribution data A signal output unit for outputting the trigger signal; And a sampling section for sampling the detection signal outputted from the side section.

Figure R1020157029848

Description

TECHNICAL FIELD [0001] The present invention relates to a partial discharge measurement apparatus, a partial discharge measurement method,

The present invention relates to a partial discharge measuring apparatus, a partial discharge measuring method, and a program.

2. Description of the Related Art [0002] There is known a method of evaluating the degree of similarity of a signal measured with respect to a partial discharge signal by a neural network to determine the presence or absence of a partial discharge (see, for example, Patent Document 1 ).

Japanese Laid-Open Patent Publication No. 1996-338856

However, in the conventional method, sampling is not performed on the basis of a trigger signal outputted based on an output condition, so that a detection signal such as a noise of low frequency, which is not a partial discharge, is sampled There was a case.

It is therefore an object of the present invention to provide a partial discharge measuring apparatus, partial discharge measuring method, and program capable of sampling a detection signal of a partial discharge from a detection signal of an alternating current including a low frequency noise and the like.

There is provided a partial discharge measuring apparatus for measuring a partial discharge occurring in an electric power facility according to an aspect of the present invention, comprising: measuring an alternating current flowing through the electric power facility; An electric charge obtained from the phase of the applied high-voltage current or voltage measured by the measuring unit, an electric charge obtained by the phase, and an electric charge obtained from the measurement of the alternating current obtained by the phase occur per unit time Wherein the distribution data includes at least one of an output condition based on at least one of the phase, the charge, and the occurrence frequency corresponding to the partial discharge in the distribution data, A signal output section for outputting a trigger signal when the alternating current is satisfied, When the trigger signal from the output, characterized by having a sample to carry out the sampling of the detection output signal of the measuring part.
A partial discharge measuring method performed by a partial discharge measuring apparatus for measuring a partial discharge occurring in an electric power facility according to an aspect of the embodiment of the present invention is characterized in that the partial discharge measuring apparatus includes an alternating current And outputting, as a detection signal, a voltage value based on the alternating current; and a control section for controlling the partial discharge measuring device to measure the phase difference between the phase of the applied high voltage current or voltage measured by the measuring section, And a distribution data generating process for generating distribution data indicating a distribution of the frequency of occurrences of the charges obtained from the measurement of the alternating current obtained in the phase per unit time, , Wherein the phase corresponding to the partial discharge, the charge, and the frequency of occurrence A signal output process for outputting a trigger signal when the alternating current satisfies an output condition based on any one of the plurality of output signals; and, when the trigger signal is output in the signal output process, And a sampling process for sampling the detection signal to be performed by the sampling unit.
There is provided a program recorded in a computer-readable storage medium for causing a partial discharge measuring apparatus for measuring a partial discharge occurring in an electric power facility to perform the measurement of the partial discharge in an aspect of an embodiment of the present invention, The partial discharge measuring apparatus comprising: a measuring process of measuring an alternating current flowing through the electric power facility and outputting a voltage value based on the alternating current as a detection signal; and a partial discharge measuring device for measuring the voltage of the applied high- Generating distribution data indicating a distribution of the frequency of occurrences per unit time of the electric charge obtained from the phase of the electric current or voltage, the electric charge obtained by the phase, and the electric charge obtained from the measurement of the alternating current obtained by the phase And the partial discharge measuring apparatus is characterized in that in the distribution data, A signal output process for outputting a trigger signal when the alternating current satisfies an output condition based on at least one of the phase, the charge, and the occurrence frequency corresponding to the partial discharge; And a step of performing a sampling process of sampling the detection signal outputted in the measurement process when the trigger signal is output in the signal output process.

It is possible to provide a partial discharge measuring apparatus, a partial discharge measuring method, and a program capable of sampling a partial discharge detecting signal from a detection signal of an alternating current including a low frequency noise and the like.

1 is a block diagram for explaining an example of a hardware configuration of a partial discharge measuring apparatus according to an embodiment of the present invention.
2 is a flow chart for explaining an example of overall processing by the partial discharge measuring apparatus according to an embodiment of the present invention.
3 is a diagram for explaining an example of a case where distribution data according to an embodiment of the present invention is represented by a? -QN distribution diagram.
4 is a? -QN distribution diagram for explaining an example of the threshold value of the charge amount Q according to the embodiment of the present invention.
5 is a timing chart for explaining an example of a trigger signal and sampling according to an embodiment of the present invention.
6 is a? -QN distribution diagram for explaining an example of the effect of setting the threshold value of the charge amount Q according to the embodiment of the present invention.
7 is a waveform diagram for explaining an example of the effect of low frequency noise in the embodiment of the present invention.
Fig. 8 is a diagram showing a example of the setting of the range of the phase [phi] according to the embodiment of the present invention and a φ-QN distribution for explaining an example of the effect of the setting.
FIG. 9 is a view showing the example of the setting of the threshold of the occurrence frequency N according to the embodiment of the present invention and the φ-QN distribution for explaining an example of the effect of the setting.
10 is a? -QN distribution diagram for explaining an example of the setting of the threshold value of the charge amount Q and the range of the phase? And an example of the effect of the setting according to the embodiment of the present invention.
11 is a? -QN distribution diagram for explaining an example of the setting of the threshold of the charge amount Q, the threshold of the occurrence frequency N, and an example of the effect of the setting according to the embodiment of the present invention.
Fig. 12 is a view showing the example of the setting of the range of the phase?, The threshold of the occurrence frequency N, and the example of the effect of the setting according to the embodiment of the present invention.
Fig. 13 is a view showing the example of the setting of the threshold value of the amount of charge Q, the range of the phase?, The threshold of the occurrence frequency N, and the example of the effect of the setting according to the embodiment of the present invention.
14 is a? -QN distribution diagram for explaining an example of the effect of calculation, setting, and setting of the threshold value of the charge amount Q by the setting unit according to the embodiment of the present invention.
15 is a block diagram for explaining an example of a hardware configuration of a partial discharge measuring apparatus having two measuring units according to an embodiment of the present invention.
16 is a? -QN distribution diagram for explaining an example of the threshold value of the charge amount Q in the case of the partial discharge measuring apparatus having two measuring units according to the embodiment of the present invention.

Hereinafter, a partial discharge measuring apparatus for measuring a partial discharge occurring in a power facility of the present invention will be described.

≪ Embodiment 1 >

≪ Hardware configuration of partial discharge measuring apparatus >

1 is a block diagram for explaining an example of a hardware configuration of a partial discharge measuring apparatus according to an embodiment of the present invention.

The partial discharge measuring apparatus 100 includes a sensor 100H1, an amplifier 100H2, a filter 100H3, a detection processing circuit 100H4, a? -QN measurement board Board 100H5, a waveform measurement board 100H6, a phase detection sensor 100H7, and a phase signal processing circuit 100H8.

The sensor 100H1 is an example of a measuring unit. Hereinafter, a case in which the measurement part is the sensor 100H1 will be described as an example.

The sensor 100H1 is connected to a power facility such as a cable in which the partial discharge is measured.

The electric power facilities are, for example, cables, connection boxes, and gas insulated switches (GIS). In the following description, the case where the power equipment is a cable will be described as an example.

The sensor 100H1 is constituted by a current sensor such as a high frequency CT (Current Transformers), and the sensor 100H1 measures an alternating current of a high voltage flowing in a power facility such as a cable.

The high alternating current is an alternating current having a voltage of, for example, 600 V or more.

The sensor 100H1 converts the measured current value of the alternating current into a voltage. The voltage value of the converted voltage is output to the amplifier 100H2 as the detection signal SIG1. The output terminal of the sensor 100H1 is connected to the input terminal of the amplifier 100H2.

The amplifier 100H2 amplifies the detection signal SIG1 output from the sensor 100H1. The output terminal of the amplifier 100H2 is connected to the input terminal of the filter 100H3 and the input terminal of the waveform measurement board 100H6.

The filter 100H3 is a band-pass filter. The filter 100H3 extracts a signal of a specific frequency band from the detection signal SIG1 amplified by the amplifier 100H2. The output terminal of the filter 100H3 is connected to the input terminal of the detection processing circuit 100H4.

The detection processing circuit 100H4 performs detection processing. The detection processing detects the presence or absence of each waveform included in the detection signal SIG1. The output terminal of the detection processing circuit 100H4 is connected to the input terminal of the? -Q-N measurement board 100H5.

The phase detection sensor 100H7 is mounted on a power facility such as a cable. The phase detecting sensor 100H7 detects a high-voltage current or voltage flowing through the power equipment. The output terminal of the phase detecting sensor 100H7 is connected to the input terminal of the phase signal processing circuit 100H8.

The phase signal processing circuit 100H8 detects a zero-cross of the signal inputted from the phase detecting sensor 100H7. The phase signal processing circuit 100H8 outputs the reference point to the? -Q-N measurement board 100H5 and the waveform measurement board 100H6 based on the detected zero cross. The output terminal of the phase signal processing circuit 100H8 is connected to the input terminal of the? -Q-N measurement board 100H5 and the input terminal of the waveform measurement board 100H6.

The? -Q-N measurement board 100H5 is an example of a distribution data generation unit. Hereinafter, the case where the distribution data generator is the? -Q-N measurement board 100H5 will be described as an example.

The φ-Q-N measurement board 100H5 is an example of a signal output unit. Hereinafter, the case where the signal output portion is the? -Q-N measurement board 100H5 will be described as an example.

The? -Q-N measurement board 100H5 is an example of a setting unit. Hereinafter, the case where the setting unit is the? -Q-N measurement board 100H5 will be described as an example.

The φ-Q-N measurement board 100H5 has an A / D (Analog / Digital) converter 100H51, a memory 100H52, and an MCU (Micro Controller Unit) 100H53.

The φ-Q-N measurement board 100H5 is an electronic circuit board for mounting an FPGA (Field-Programmable Gate Array) or the like.

The? -Q-N measurement board 100H5 generates distribution data based on the detection signal SIG1. The φ-Q-N measurement board 100H5 calculates a peak point, which is the maximum point of each waveform included in the detection signal SIG1, by digital filter processing. At this time, the φ-Q-N measurement board 100H5 calculates the phase φ at the peak point in φ-Q-N measurement by using the phase reference point and the internal counter of the microprocessor MCUH531.

The? -Q-N measurement board 100H5 outputs the trigger signal SIG2 to the waveform measurement board 100H6 based on the output condition.

The A / D converter 100H51 has an input terminal of the? -Q-N measurement board 100H5. The A / D converter 100H51 A / D converts the detection signal SIG1. The output terminal of the A / D converter 100H51 is connected to the input terminal of the memory 100H52 and the input terminal of the MCU 100H53.

The memory 100H52 stores various data and parameters used in the? -Q-N measurement board 100H5. The output terminal of the memory 100H52 is connected to the input terminal of the MCU 100H53.

The MCU 100H53 has a microprocessor MCUH531.

The microprocessor MCUH531 controls each hardware included in the? -Q-N measurement board 100H5.

The output terminal of the? -Q-N measurement board 100H5 is connected to the input terminal of the waveform measurement board 100H6.

The waveform measurement board 100H6 is an example of a sampling unit. Hereinafter, the case where the sampling section is the waveform measurement board 100H6 will be described as an example.

The waveform measurement board 100H6 samples the detection signal SIG1 amplified by the amplifier 100H2. When the trigger signal SIG2 is output from the φ-Q-N measurement board 100H5, the waveform measurement board 100H6 performs sampling. When the waveform is sampled, the waveform measurement board 100H6 uses the internal counter of the microprocessor MCUH631 to store the phase data when the waveform measurement board 100H6 performs sampling.

The waveform measurement board 100H6 has an A / D converter 100H61, a memory 100H62, and an MCU 100H63.

The waveform measurement board 100H6 is an electronic circuit board for mounting an FPGA or the like.

The A / D converter 100H61 has an input terminal of the waveform measurement board 100H6. The A / D converter 100H61 A / D converts the detection signal SIG1. The output terminal of the A / D converter 100H61 is connected to the input terminal of the memory 100H62 and the input terminal of the MCU 100H63.

The memory 100H62 stores various data and parameters used in the waveform measurement board 100H6.

The MCU 100H63 has a microprocessor MCUH631.

The microprocessor MCUH631 controls each hardware of the waveform measurement board 100H6.

The output terminals of the? -Q-N measurement board 100H5 and the waveform measurement board 100H6 are connected to input terminals of an information processing apparatus such as a PC (Personal Computer) 101 and the like.

The? -Q-N measurement board 100H5 outputs, for example, distribution data generated in the PC 101, and the PC 101 displays the distribution data in the? -Q-N distribution diagram or the like. The φ-Q-N measurement board 100H5 inputs, for example, a setting value used for determining the output condition from the PC 101. [

The waveform measurement board 100H6 outputs the sampled data to the PC 101, for example, and the PC 101 displays the waveform based on the sampled data.

The hardware configuration of the partial discharge measuring apparatus is not limited to the configuration shown in Fig. The hardware configuration of the partial discharge measuring apparatus may be a configuration having an analyzer (not shown) such as an oscilloscope and a spectrum analyzer.

≪ Whole process by partial discharge measuring device >

2 is a flow chart for explaining an example of overall processing by the partial discharge measuring apparatus according to an embodiment of the present invention.

In step S0201, the sensor 100H1 measures an alternating current flowing in a power facility such as a cable, and performs a process of outputting the detection signal SIG1 to the? -QN measurement board 100H5 and the waveform measurement board 100H6 . The detection signal SIG1 is amplified by the amplifier 100H2. The detection signal SIG1 extracts a signal of a specific frequency band by the filter 100H3. Detection signal SIG1 is subjected to detection processing by detection processing circuit 100H4.

In step S0202, the? -Q-N measurement board 100H5 performs a process of generating distribution data based on the detection signal SIG1.

In step S0203, the? -Q-N measurement board 100H5 performs processing for outputting the generated distribution data to the PC 101. [

3 is a diagram for explaining an example of a case where distribution data according to an embodiment of the present invention is represented by a? -Q-N distribution diagram.

The distribution data is, for example, data represented by a φ-Q-N distribution diagram. 3 is an example of a? -Q-N distribution diagram showing distribution data. The abscissa axis in Fig. 3 is an axis indicating the applied high voltage current flowing through the electric power equipment measured by the phase detecting sensor 100H7, or the phase? Of the voltage. The ordinate of Fig. 3 is the axis representing the applied high-voltage current flowing through the electric power facility shown by the abscissa or the electric charge obtained by the phase? Of the voltage. Charge is expressed by the amount of charge Q. The color of each point in Fig. 3 represents the occurrence frequency N of each charge obtained in the phase? Per unit time. The occurrence frequency N can be obtained by integrating the case where the same phase? Per unit time and the same charge amount Q is generated.

The distribution data is output to the PC 101 in step S0203, and the PC 101 displays the distribution data in the form of the? -Q-N distribution diagram on the basis of the output distribution data to the user. Hereinafter, the charge of the detection signal output from the sensor 100H1 may be represented by the? -Q-N distribution diagram.

In step S0204, the? -Q-N measurement board 100H5 performs a process of inputting, from the PC 101, the threshold value of the electric charge corresponding to the partial discharge as a set value.

In step S0204, the? -Q-N measurement board 100H5 performs a process of inputting, as a set value, the threshold value of the charge amount Q from the PC 101. When the output condition is determined based on the threshold value of the charge amount Q, When determining the output condition based on the range of the phase?, In step S0204, the? -Q-N measurement board 100H5 performs processing for inputting the upper limit value and the lower limit value from the PC 101 as a set value. When determining the output condition based on the threshold of the occurrence frequency N, in step S0204, the? -Q-N measurement board 100H5 performs a process of inputting, as a set value, the threshold of the occurrence frequency N from the PC 101. [

In step S0205, the sensor 100H1 measures an alternating current flowing in a power facility such as a cable and outputs a detection signal SIG1 to the? -QN measurement board 100H5 and the waveform measurement board 100H6 in the same manner as in step S0201 . In step S0205, the? -Q-N measurement board 100H5 may perform processing for generating distribution data as in step S0202 based on the detection signal SIG1 output from the sensor 100H1.

In step S0206, the? -Q-N measurement board 100H5 determines whether or not the measured alternating current meets the output condition. The output condition is a condition for determining whether the? -Q-N measurement board 100H5 outputs the trigger signal SIG2. When the output condition is satisfied, the? -Q-N measurement board 100H5 outputs the trigger signal SIG2. In step S0206, the? -Q-N measurement board 100H5 proceeds to step S0207 when determining that the output condition is satisfied (YES in step S0206). In step S0206, the? -Q-N measurement board 100H5 returns to step S0205 when determining that the output condition is not satisfied (NO in step S0206).

The φ-Q-N measurement board 100H5 performs determination as to whether or not the output condition is satisfied based on, for example, a threshold value of the charge amount Q to be input as a set value. Hereinafter, a case of determining whether or not the output condition is satisfied is performed based on the threshold value of the charge amount Q will be described as an example. The explanation is given by taking the case of Fig. 3 as an example.

4 is a? -Q-N distribution diagram illustrating an example of the threshold value of the charge amount Q according to the embodiment of the present invention.

When determining whether or not the φ-QN measurement board 100H5 satisfies the output condition based on the threshold value of the charge quantity Q, the φ-QN measurement board 100H5 sets the threshold QTh of the charge quantity Q as the set value in step S0204 Is input. The threshold value QTh of the charge amount Q is a value determined by the user based on the? -Q-N distribution chart displayed by the PC 101 in step S0203, for example. The threshold value QTh of the charge amount Q is determined by the user, for example, to a value larger than the charge amount of the noise.

In the case of FIG. 3, when the threshold value QTh of the amount of charge Q is set, the threshold value QTh of the amount of charge Q is expressed as shown in FIG. In the case of FIG. 4, in step S0206, the? -Q-N measurement board 100H5 judges whether or not the output condition is satisfied, depending on whether or not it is electric charge equal to or larger than the threshold value QTh of the electric charge quantity Q. In the case of FIG. 4, the charge equal to or higher than the threshold value QTh of the charge amount Q is the charge corresponding to the partial discharge. In Fig. 4, the electric charges exceeding the threshold value QTh of the electric charge quantity Q are electric charges in the range shown by oblique lines.

In the case of FIG. 4, in step S0206, the? -Q-N measurement board 100H5 judges that the output condition is not satisfied when the charge is less than the threshold value QTh of the charge amount Q. When it is determined that the output condition is not satisfied, the sensor 100H1 measures an alternating current flowing in a power facility such as a cable. Therefore, the processes of step S0205 and step S0206 are repeatedly performed until the AC current satisfying the output condition is measured.

In step S0207, the? -Q-N measurement board 100H5 outputs the trigger signal SIG2 to the waveform measurement board 100H6.

In step S0208, the waveform measurement board 100H6 samples the detection signal SIG1 based on the trigger signal SIG2.

5 is a timing chart for explaining an example of a trigger signal and sampling according to an embodiment of the present invention.

The detection signal SIG1 measured and outputted by the sensor 100H1 in step S0205 is, for example, the detection signal SIG1 shown in Fig. The detection signal SIG1 is processed by the filter 100H3 and the detection processing circuit 100H4 to become the detection processing signal SIG1A subjected to the filter processing and detection processing shown in Fig. In step S0206, the φ-Q-N measurement board 100H5 detects the peak point Pk1A of the detection signal SIG1A subjected to the filter processing and detection processing, and determines whether or not the output condition is satisfied. The filter processing, and the peak point Pk1A of the detection signal SIG1A subjected to detection processing are set as the trigger timing T1A.

If it is determined in step S0206 that the φ-Q-N measurement board 100H5 satisfies the output condition, in step S0207, the φ-Q-N measurement board 100H5 outputs the trigger signal SIG2. The trigger signal SIG2 is output based on the timing of the trigger timing T1A.

When the trigger signal SIG2 is output in step S0207, the waveform measurement board 100H6 performs sampling in step S0208. The sampling in step S0208 is performed based on the timing at which the trigger signal SIG2 is output, for example. The trigger signal SIG2 is output at the trigger timing T1A shown in Fig. 5, for example. When the trigger signal SIG2 is outputted, the waveform measurement board 100H6 samples the detection signal SIG1.

Hereinafter, the case where the waveform measurement board 100H6 performs sampling at the timing of the trigger timing T1A will be described as an example.

When sampling is performed at the trigger timing T1A, the waveform measurement board 100H6 samples the detection signal SIG1 of the trigger preprocessing time T2 a predetermined time before the trigger timing T1A. When sampling is performed based on the trigger timing T1A, the waveform measurement board 100H6 samples the detection signal SIG1 of the post-trigger processing time T3 after a predetermined time (after) the trigger timing T1A. That is, the waveform measurement board 100H6 performs a process of sampling the detection signal SIG1 with respect to the time when the sampling range SIG3 becomes High. The sampling processing range SIG3 is a time that can be arbitrarily adjusted by software or the like in advance. In the sampling processing range SIG3, the time at which the peak point Pk1 of the detection signal SIG1 is sufficiently included is set.

The waveform measurement board 100H6 stores data of the detection signal SIG1 for the trigger preprocessing time T2, for example. Each time the sensor 100H1 outputs the detection signal SIG1, the waveform measurement board 100H6 overwrites the stored data of the detection signal SIG1 with the stored data and updates the data. The data of the detection signal SIG1 is stored, for example, in the memory 100H62 or the like. That is, the waveform measurement board 100H6 stores the detection signal SIG1 for a predetermined time regardless of the output of the trigger signal SIG2. When the trigger signal SIG2 is not output, the waveform measurement board 100H6 deletes the oldest data and stores the detection signal SIG1 newly output from the sensor 100H1. When the trigger signal SIG2 is output, the waveform measurement board 100H6 performs sampling of the step S0208 for the trigger pretreatment time T2 stored before being deleted and the detection signal SIG1 for the post-trigger processing time T3. In the case of Fig. 5, the waveform measurement board 100H6 samples the data of the detection signal SIG1 of the sampling data SA.

In step S0209, the waveform measurement board 100H6 outputs the data of the sampled partial discharge detection signal SIG1. The data of the partial discharge detection signal SIG1 sampled in step S0208 is output to the PC 101, for example. The PC 101 displays the data of the detected detection signal to the user with a waveform diagram or the like. The waveform measurement board 100H6 may output the data of the detection signal SIG1 of the partial discharge to be sampled to the recording medium.

The timing at which the waveform measurement board 100H6 samples data of the partial discharge waveform is not limited to the timing based on the trigger preprocessing time T2. The waveform measurement board 100H6 may detect the peak point Pk1 of the detection signal SIG1 and perform sampling at the detected timing. That is, the waveform measurement board 100H6 may adjust the timing of sampling.

As shown in Fig. 5, the filter processing and the peak point Pk1A of the detection signal SIG1A subjected to the detection processing are different from the peak point Pk1 of the detection signal SIG1 because the filtering processing and the detection processing are performed. The difference between the peak point Pk1A of the detection signal SIG1A subjected to the filter processing and the detection processing and the peak point Pk1 of the detection signal SIG1 changes in accordance with the detection signal SIG1. The difference between the peak point Pk1A of the detection signal SIG1A and the peak point Pk1 of the detection signal SIG1 changes due to the filter processing and the detection processing and therefore the trigger timing T1A is detected with respect to the timing of the peak point Pk1 of the detection signal SIG1 And changes in accordance with the signal SIG1. When the data sampled in step S0209 is displayed to the user by the PC 101 because the trigger timing T1A changes with respect to the timing of the peak point Pk1 of the detection signal SIG1, The data of the detection signal SIG1 may be sampled at a timing at which the peak point Pk1 becomes a display that is difficult for the user to see.

The waveform measurement board 100H6 detects the peak point Pk1 of the detection signal SIG1 in order to make the peak point Pk1 of the detection signal SIG1 visible to the user in the waveform diagram. The detection of the peak point Pk1 of the detection signal SIG1 can be detected by the waveform measurement board 100H6 obtaining the maximum value of the voltage value of the detection signal SIG1 or the like. In the case of Fig. 5, the waveform measurement board 100H6 samples the data of the detection signal SIG1 of the sampling data SB based on the detection of the peak point Pk1 of the detection signal SIG1.

By detecting the peak point Pk1 of the detection signal SIG1, the waveform measurement board 100H6 samples the data of the detection signal SIG1 of the partial discharge whose peak point Pk1 of the detection signal SIG1 is visible to the user, for example, can do.

The detection of the peak point Pk1 of the detection signal SIG1 may be difficult, for example, when the detection signal SIG1 contains low-frequency noise.

Thus, the waveform measurement board 100H6 performs digital filter processing on the detection signal SIG1 when the detection signal SIG1 includes low-frequency noise. The filter unit is, for example, a waveform measurement board 100H6. Hereinafter, the case where the filter part is the waveform measurement board 100H6 will be described as an example. When the waveform measurement board 100H6 performs digital filter processing on the detection signal SIG1 output from the sensor 100H1, the waveform measurement board 100H6 performs digital filter processing in the frequency band that the filter 100H3 performs. By the digital filter processing, the low-frequency noise contained in the detection signal SIG1 is attenuated. Since the low frequency noise is attenuated by the digital filter processing, the waveform measurement board 100H6 can easily detect the peak point Pk1 of the detection signal SIG1 by obtaining the maximum value of the voltage value of the detection signal SIG1 by the waveform measurement board 100H6 Can be detected. Therefore, the waveform measurement board 100H6 can sample the data of the partial discharge waveform that is easy for the user to see by performing the digital filter processing. The digital filter processing is implemented by processing an electronic circuit such as an FPGA that mounts an FPGA or the like on the waveform measurement board 100H6 and mounts the circuit.

When it is judged whether or not the output condition is satisfied in accordance with whether or not the? -QN measuring board 100H5 is an electric charge equal to or higher than the threshold value QTh of the electric charge quantity Q, the waveform measuring board 100H6 outputs an alternating current The detection signal of the partial discharge can be sampled.

FIG. 6 is a? -Q-N distribution diagram for explaining an example of the effect of setting the threshold value of the charge amount Q according to the embodiment of the present invention.

6A is a? -QN distribution diagram showing an example of distribution data based on a noise detection signal when the sensor 100H1 measures noise and the sensor 100H1 outputs a noise detection signal .

When the sensor 100H1 measures the noise NIS generated in the power equipment such as a cable, the noise NIS is shown in, for example, Fig. 6 (a) in the? -Q-N distribution diagram. The noise NIS is, for example, so-called Background noise. Background noise is a noise that varies depending on a measurement place of a power equipment such as a cable and a frequency of an alternating current to be measured. Background noise is a noise that occurs in other power equipment, such as when entering from outside of a power facility such as a cable, or when it is always present, such as white noise.

6 (b) is a? -Q-N distribution diagram for explaining an example of the case where the threshold value QTh of the quantity of charges Q is set. 6 (b) is a φ-Q-N distribution diagram shown in FIG. 6 (a).

In the case of noise in Fig. 6A, the set value of the threshold value of the electric charge corresponding to the partial discharge in step S0204 is input as the threshold value QTh of the electric charge quantity Q shown in Fig. 6B, for example. The threshold value QTh of the charge amount Q is larger than the charge amount Q of the noise NIS.

When the threshold value QTh of the quantity of charge Q is set as shown in FIG. 6 (b), in step S0206, the? -QN measuring board 100H5 judges whether the output condition is satisfied or not in accordance with whether or not the quantity is equal to or larger than the threshold value QTh of the quantity of charges Q . 6 (b), in step S0207, the φ-Q-N measurement board 100H5 outputs a trigger signal when the charge amount of the charge is equal to or larger than the threshold value QTh of the charge amount Q. In the case of Fig. 6B, in step S0207, the φ-Q-N measurement board 100H5 does not output the trigger signal in the noise NIS whose electric charge is a charge whose value is smaller than the threshold value QTh of the electric charge quantity Q.

7 is a waveform diagram for explaining an example of the effect of low frequency noise in the embodiment of the present invention.

7A is a waveform diagram showing an example of a case where a threshold value of the voltage value of the detection signal is set and the detection signal of the partial discharge is sampled.

In the case shown in Fig. 7A, in the case of sampling the partial discharge detection signal, the voltage value of the detection signal SIG1 outputted from the sensor 100H1 by the partial discharge is estimated in advance. In the case of Fig. 7A, the waveform measurement board 100H6 is set as a threshold value of a voltage value for which a speculative voltage value is sampled. When the threshold value is set in the waveform measurement board 100H6, the waveform measurement board 100H6 performs sampling when the detection signal SIG1 of the voltage value equal to or higher than the set threshold value is output. The case where the detection signal SIG1 of the voltage value equal to or higher than the set threshold value is output is in the case of the trigger occurrence point in the case of Fig. 7A. In the case of Fig. 7A, the waveform measurement board 100H6 performs sampling at the timing of the trigger occurrence point. For example, the waveform measurement board 100H6 stores the waveform data for a predetermined time before the timing of the trigger generation point, and outputs the data of the waveform stored before and after the trigger generation point.

Fig. 7 (b) is a waveform diagram showing an example of sampling the detection signal of the partial discharge including the low-frequency noise by the method of Fig. 7 (a).

7B is an example of a case where the voltage value equal to or higher than the threshold value to be set is output even when it is not a partial discharge in the case of a partial discharge detection signal including a low frequency noise. Due to the low-frequency noise, the voltage value may become a voltage value equal to or higher than the threshold value. When a voltage value equal to or higher than a threshold value to be set is output, the waveform measurement board 100H6 performs sampling to the trigger generation point even when the voltage is not a partial discharge. In the case of Fig. 7 (b), it is difficult for the waveform measurement board 100H6 to select and sample the timing at which the detection signal corresponding to the partial discharge waveform is output from a plurality of trigger occurrence points shown. Therefore, in the case of Fig. 7 (b), the waveform measurement board 100H6 may not be able to sample the partial discharge due to low-frequency noise.

In the measurement of the partial discharge, a method of recording a waveform using an instrument such as an oscilloscope for waveform observation or an A / D sampling board may be used.

When judging whether or not the output condition is satisfied by whether or not the electric charge is equal to or larger than the threshold value QTh of the electric charge quantity Q, the waveform measurement board 100H6 determines whether the electric charge is larger than the threshold value QTh of the electric charge quantity Q by the threshold value QTh of the electric charge quantity Q, do. Therefore, it is judged whether or not the output condition is satisfied based on whether or not the electric charge is equal to or higher than the threshold value QTh of the electric charge quantity Q. The waveform measurement board 100H6 has a function of measuring the electric charge of the noise NIS shown in Fig. 6 and the low- The number of sampling times can be reduced. Therefore, the partial discharge measuring apparatus 100 can sample the detection signal of the partial discharge from the detection signal of the alternating current including the low-frequency noise and the like.

The? -Q-N measurement board 100H5 may judge whether or not the output condition is satisfied based on, for example, the range of the phase? inputted as the set value. Hereinafter, a case of determining whether or not the output condition is satisfied is performed based on the range of the phase? Will be described as an example.

FIG. 8 is a view showing an example of the setting of the range of the phase? According to the embodiment of the present invention and a? -Q-N distribution diagram for explaining an example of the effect of the setting. Hereinafter, the case of the distribution data of FIG. 3 will be described as an example.

The range of the phase? Is, for example, a range determined by setting the upper and lower limits of the phase?.

In step S0206, the? -Q-N measurement board 100H5 judges whether or not the output condition is satisfied based on the lower limit value and the upper limit value of the phase? Inputted as a set value, for example. QN measurement board 100H5 determines whether or not the φ-QN measurement board 100H5 satisfies the output condition of step S0206 based on the range of the phase φ. In step S0204, The upper limit value and the lower limit value of the phase? Corresponding to the partial discharge are inputted as set values. When a partial discharge occurs, the charge is represented as a distribution concentrated at two places in the? -Q-N distribution diagram, as shown in FIG. FIG. 8 is a diagram showing a case where a charge is concentrated at two locations by a partial discharge, and a case where there is a noise signal intruded from another noise source. FIG. The range of the phase [phi] is set to the range of the phase [phi] in which the partial discharge occurs.

In the case of Fig. 8, in step S0206, the phi-QN measurement board 100H5 determines whether or not the phase &thetas; of the alternating current of the detection signal SIG1 output from the sensor 100H1 is equal to or larger than the set lower limit value, In the case of phase, it is determined that the output condition is satisfied (YES in step S0206). Therefore, when the phase &thetas; of the alternating current of the detection signal SIG1 output from the sensor 100H1 is a phase of a lower limit value or more and a phase value that is smaller than the upper limit value, the phi-Q-N measurement board 100H5 outputs, SIG2 are output in step S0207. In Fig. 8, the charge for outputting the trigger signal SIG2 in step S0207 is the charge in the range indicated by oblique lines.

8, since the φ-QN measurement board 100H5 outputs the trigger signal SIG2 corresponding to the charge in the range of the phase φ corresponding to the partial discharge, the waveform measurement board 100H6 is configured to output the trigger signal SIG2 corresponding to the partial discharge Sampling is performed corresponding to the charge in the range of the phase [phi]. As shown in Fig. 8, when charges other than the partial discharge are generated, the waveform measurement board 100H6 occasionally performs a process of sampling charges other than the partial discharge. In the case of Fig. 8, the waveform measurement board 100H6 performs the sampling process of step S0208 in response to the charge in the range of the phase? Corresponding to the partial discharge. Therefore, it is determined whether or not the output condition is satisfied according to whether or not the charge is in the range of the phase? Corresponding to the partial discharge. The waveform measurement board 100H6 samples the detection signal such as noise, Can be reduced. Therefore, the partial discharge measuring apparatus 100 can sample the detection signal of the partial discharge from the detection signal of the alternating current including noise and the like.

The? -Q-N measurement board 100H5 may judge whether or not the output condition is satisfied, for example, based on the threshold of the occurrence frequency N inputted as the set value. Hereinafter, a case where determination as to whether or not the output condition is satisfied is performed based on the threshold value of the occurrence frequency N will be described as an example.

9 is a φ-Q-N distribution diagram for explaining an example of the setting of the threshold of the occurrence frequency N and an example of the effect of the setting according to the embodiment of the present invention.

When the φ-QN measuring board 100H5 judges whether or not the output condition is satisfied based on the threshold of the occurrence frequency N, the φ-QN measuring board 100H5 sets the occurrence frequency as a set value in step S0204 The threshold value NTh of N is input. The threshold value NTh of the occurrence frequency N is a value determined by the user based on, for example, the? -Q-N distribution diagram displayed by the PC 101 in step S0203. The threshold value NTh of the occurrence frequency N is a value larger than the occurrence frequency N of the noise of the noise, for example, and is determined by the user. In the case of FIG. 9, the threshold value NTh of the occurrence frequency N is input as 30 pps (Pulse Per Second).

In the case of Fig. 9, in step S0206, the φ-Q-N measurement board 100H5 judges whether or not the output condition is satisfied according to whether or not the occurrence frequency N is equal to or higher than the threshold value NTh of the occurrence frequency N. In the case of Fig. 9, the charge of the occurrence frequency N exceeding the threshold value NTh of the occurrence frequency N is the charge corresponding to the partial discharge.

9, in step S0206, when the charge of the detection signal SIG1 output from the sensor 100H1 is the charge of occurrence frequency N equal to or higher than the threshold value NTh of the occurrence frequency N set in the φ-QN measurement board 100H5 , It is determined that the output condition is satisfied (YES in step S0206). Therefore, when the charge of the detection signal SIG1 outputted by the sensor 100H1 is the charge of the occurrence frequency N equal to or higher than the threshold value NTh of the occurrence frequency N, the? -QN measurement board 100H5 outputs the trigger signal SIG2 in step S0207 do. In Fig. 9, the charge for outputting the trigger signal SIG2 in step S0207 is shown by a broken line.

9, the? -QN measurement board 100H5 outputs the trigger signal SIG2 corresponding to the charge of the frequency of occurrence corresponding to the partial discharge, so that the waveform measurement board 100H6 outputs the occurrence frequency corresponding to the partial discharge Sampling is carried out in correspondence with the charge of the gate electrode. As shown in Fig. 9, when charges other than the partial discharge are generated, the waveform measurement board 100H6 sometimes samples charges other than the partial discharge. In the case of Fig. 9, the waveform measurement board 100H6 performs sampling in step S0208 corresponding to the charge of the frequency of occurrence corresponding to the partial discharge. Therefore, it is determined whether or not the output condition is satisfied, depending on whether or not the charge is of the occurrence frequency corresponding to the partial discharge. The case where the waveform measurement board 100H6 samples noises, which are electric charges other than the partial discharge, can do. Therefore, the partial discharge measuring apparatus 100 can sample the detection signal of the partial discharge even with the detection signal of the alternating current including the noise or the like.

The output condition may be a condition in which the threshold value of the charge amount Q, the range of the phase?, And the threshold of the occurrence frequency N are used in combination.

10 is a φ-Q-N distribution diagram for explaining an example of setting of the threshold value of the charge amount Q and the range of the phase φ and an example of the effect of the setting according to the embodiment of the present invention.

In the case of Fig. 10, similarly to Fig. 6, in step S0204, the threshold value QTh of the charge amount Q is input as the set value. In the case of Fig. 10, similarly to Fig. 8, in step S0204, the upper limit value and lower limit value for setting the range of the phase [phi] are input as the set value.

In the case of Fig. 10, in step S0206, the φ-Q-N measurement board 100H5 judges whether or not the output condition is satisfied, depending on whether or not it is electric charge equal to or larger than the threshold value QTh of the electric charge quantity Q. 10, in step S0206, the? -QN measuring board 100H5 detects the phase of the alternating current of the detection signal SIG1 output from the sensor 100H1 by a phase of at least the lower limit and a value smaller than the upper limit It is determined whether or not the output condition is satisfied. In the case of Fig. 10, the φ-QN measurement board 100H5 judges that the output condition is satisfied when both the conditions relating to the quantity of charge Q and the conditions relating to the phase φ are satisfied YES in S0206).

In Fig. 10, the charge for outputting the trigger signal SIG2 in step S0207 is the charge in the range indicated by oblique lines.

In the case of Fig. 10, the φ-QN measurement board 100H5 outputs the trigger signal SIG2 when both the conditions relating to the quantity of charge Q and the conditions relating to the phase φ are satisfied, The board 100H6 performs sampling when both the conditions related to the amount of charge Q and the conditions related to the phase? Are satisfied. In the case of Fig. 10, the waveform measurement board 100H6 can perform sampling of the detection signal of the partial discharge more precisely than the output condition using either the charge amount Q or the phase? Alone.

The output condition may be a condition in which a threshold value of the charge amount Q and a threshold value of the occurrence frequency N are used in combination.

11 is a? -Q-N distribution diagram for explaining an example of the setting of the threshold of the charge amount Q, the threshold of the occurrence frequency N, and an example of the effect of the setting according to the embodiment of the present invention.

In the case of Fig. 11, as in the case of Fig. 6, in step S0204, the threshold value QTh of the charge amount Q is input as the set value. In the case of Fig. 11, similarly to the case of Fig. 9, in step S0204, the threshold value NTh of the occurrence frequency N is input as the set value. In the case of FIG. 11, the threshold value NTh of the occurrence frequency N is input at 30 pps as in the case of FIG.

In the case of Fig. 11, in step S0206, the φ-Q-N measurement board 100H5 judges whether or not the output condition is satisfied in accordance with whether or not it is electric charge equal to or larger than the threshold value QTh of the electric charge quantity Q. 11, the? -QN measurement board 100H5 is configured to determine whether the charge of the detection signal SIG1 output from the sensor 100H1 is equal to or higher than the threshold NTh of the occurrence frequency N, Is satisfied or not. In the case of Fig. 11, the φ-QN measuring board 100H5 judges that the output condition is satisfied when both the conditions relating to the quantity of charge Q and the conditions relating to the frequency of occurrence N are satisfied ( YES in step S0206).

11, the φ-QN measurement board 100H5 outputs the trigger signal SIG2 when both the conditions relating to the quantity of charge Q and the conditions relating to the occurrence frequency N are satisfied, The measurement board 100H6 performs sampling when both the conditions relating to the charge amount Q and the conditions relating to the occurrence frequency N are satisfied. In Fig. 11, the charge for outputting the trigger signal SIG2 in step S0207 is the charge in the range indicated by the broken line. In the case of Fig. 11, the waveform measurement board 100H6 performs the sampling of the detection signal of the partial discharge with high accuracy, as in the case of Fig. 10, rather than the output condition using either the charge amount Q or the occurrence frequency N singly .

The output condition may be a condition in which the range of the phase? And the threshold of the occurrence frequency N are used in combination.

12 is a φ-Q-N distribution diagram illustrating an example of the setting of the range of the phase φ, the threshold of the occurrence frequency N, and an example of the effect of the setting according to the embodiment of the present invention.

In the case of Fig. 12, similarly to the case of Fig. 8, in step S0204, the upper limit value and the lower limit value for setting the range of the phase? In the case of Fig. 12, similarly to the case of Fig. 9, in step S0204, the threshold value NTh of the occurrence frequency N is input as the set value. In the case of FIG. 12, the threshold value NTh of the occurrence frequency N is input at 30 pps as in FIG.

12, in step S0206, the? -QN measuring board 100H5 detects the phase of the alternating current of the detection signal SIG1 output from the sensor 100H1 by a phase of not less than a lower limit value and a phase of a value smaller than the upper limit value It is judged whether or not the output condition is satisfied. 12, the? -QN measurement board 100H5 is configured to determine whether the charge of the detection signal SIG1 output from the sensor 100H1 is equal to or higher than the threshold NTh of the occurrence frequency N, Is satisfied or not. In the case of Fig. 12, the φ-QN measurement board 100H5 judges that the output condition is satisfied when both the conditions relating to the phase φ and the conditions relating to the occurrence frequency N are satisfied ( YES in step S0206). In Fig. 12, the charge for outputting the trigger signal SIG2 in step S0207 is the charge in the range indicated by the broken line.

In the case of Fig. 12, the φ-QN measurement board 100H5 outputs the trigger signal SIG2 when both the conditions relating to the phase φ and the conditions relating to the occurrence frequency N are satisfied, The measurement board 100H6 performs sampling when both the conditions relating to the phase? And the conditions relating to the occurrence frequency N are satisfied. In the case of Fig. 12, the waveform measurement board 100H6 performs sampling of the detection signal of the partial discharge with high accuracy, as in the case of Fig. 10, rather than the output condition using either the phase? Or the occurrence frequency N singly .

The combination of the output conditions may be a combination of the threshold value of the charge amount Q, the range of the phase?, And the threshold of the occurrence frequency N. [

13 is a? -Q-N distribution diagram for explaining an example of the setting of the threshold of the charge amount Q, the range of the phase?, The threshold of the occurrence frequency N, and an example of the effect of the setting according to the embodiment of the present invention.

In the case of FIG. 13, similarly to FIG. 6, in step S0204, the threshold value QTh of the charge amount Q is input as the set value. In the case of FIG. 13, similarly to FIG. 8, in step S0204, the upper limit value and the lower limit value for setting the range of the phase? Are inputted as the set value. In the case of Fig. 13, similarly to Fig. 9, in step S0204, the threshold value NTh of the occurrence frequency N is input as the set value. In the case of FIG. 13, the threshold value NTh of the occurrence frequency N is input at 30 pps as in FIG.

In the case of Fig. 13, in step S0206, the φ-Q-N measurement board 100H5 judges whether or not the output condition is satisfied in accordance with whether or not it is electric charge equal to or larger than the threshold value QTh of the electric charge quantity Q. 13, in step S0206, the? -QN measurement board 100H5 detects a phase of the alternating current of the detection signal SIG1 output from the sensor 100H1 by a phase of not less than the lower limit value and a value smaller than the upper limit value It is determined whether or not the output condition is satisfied. 13, the φ-QN measurement board 100H5 is configured to determine whether the charge of the detection signal SIG1 output from the sensor 100H1 is equal to or higher than the threshold NTh of the occurrence frequency N, Is satisfied or not. In the case of Fig. 13, when all three conditions are satisfied, that is, the condition relating to the quantity of charge Q, the condition relating to the phase? And the condition relating to the occurrence frequency N, the? -QN measuring board 100H5 (YES in step S0206). In Fig. 13, the charge for outputting the trigger signal SIG2 in step S0207 is the charge in the range indicated by the broken line.

When the output condition combining the threshold value of the charge amount Q, the range of the phase?, And the threshold value of the occurrence frequency N is used and the restriction based on the condition of the threshold value of the charge amount Q is not performed, (100H5) sets the smallest value output from the detection signal SIG1 to the threshold value of the amount of charge Q. QN measurement board 100H5, when the output condition combining the threshold value of the charge amount Q, the range of the phase?, And the threshold of the occurrence frequency N is used, and the restriction based on the condition of the range of the phase? ) Is set to 0 DEG for the lower limit value and 360 DEG for the upper limit value. When the output condition combining the threshold value of the charge amount Q, the range of the phase?, And the threshold of the occurrence frequency N is used, and the restriction based on the threshold value of the occurrence frequency N is not performed, 100H5) sets a threshold value NTh of occurrence frequency N to 0 pps.

13, the φ-QN measurement board 100H5 generates the trigger signal SIG2 when the three conditions of the condition related to the amount of charge Q, the condition relating to the phase φ, and the condition relating to the occurrence frequency N are satisfied The waveform measurement board 100H6 performs sampling when the three conditions, that is, the condition related to the amount of charge Q, the condition relating to the phase?, And the condition relating to the frequency of occurrence N are satisfied. In the case of FIG. 13, the waveform measurement board 100H6 can perform sampling of the detection signal of the partial discharge more precisely than the output condition using the charge amount Q, the phase?, Or the occurrence frequency N singly.

Note that the threshold value QTh of the charge amount Q is not limited to the case where the user inputs and sets the threshold value QTh from the PC 101. [

14 is a? -Q-N distribution diagram for explaining an example of the effect of calculation, setting, and setting of the threshold value of the charge amount Q by the setting unit according to the embodiment of the present invention.

When determining whether or not the φ-QN measurement board 100H5 satisfies the output condition on the basis of the threshold value of the charge quantity Q, the φ-QN measurement board 100H5 sets, in step S0204, A process of inputting the threshold value QTh is performed. The threshold value QTh of the charge amount Q may be a value calculated based on the charge amount Q of the noise. The case where the noise of Fig. 6 (a) is measured will be described as an example.

In Fig. 14, the? -Q-N measurement board 100H5 calculates the minimum value Min of the charge of the noise NIS in step S0204. The minimum value Min is the voltage value of the detection signal SIG1 which is the smallest value among the measured noise NIS.

In Fig. 14, the? -Q-N measurement board 100H5 calculates the width W at which the charge of the noise NIS is obtained in step S0204. The width W at which the charge of the noise NIS is obtained is calculated by, for example, the voltage value of the detection signal SIG1 having the smallest value and the voltage value of the detection signal SIG1 having the largest value among the measured noise NIS. The width W at which the charge of the noise NIS can be obtained may be set by the PC 101 in advance, such as a so-called 3 sigma, which is obtained by multiplying the standard deviation or the standard deviation of the charge Q of the charge of the noise NIS by three times. The width W at which the charge of the noise NIS can be obtained is not limited to the case where the user inputs a value to the PC 101 and a value is set.

The threshold value QTh of the charge amount Q is a value obtained by adding the minimum value Min to the width W at which the charge of the noise NIS is obtained as shown in Fig. Since the value QTh of the charge amount Q is set to be larger than the charge amount Q of the charge of the noise NIS, the threshold value QTh of the charge amount Q becomes a value corresponding to the partial discharge similarly to the threshold value QTh of the charge amount Q of FIG. 6B . In the case of Fig. 14, in step S0206, the φ-Q-N measurement board 100H5 judges whether or not the output condition is satisfied in accordance with whether or not it is electric charge equal to or larger than the threshold value QTh of the electric charge quantity Q. In the case of Fig. 14, similarly to the case of Fig. 6 (b), in step S0207, the φ-Q-N measurement board 100H5 outputs a trigger signal in the case of charge equal to or larger than the threshold value QTh of the charge amount Q. In the case of Fig. 14, in the step S0207, the φ-Q-N measurement board 100H5 does not output the trigger signal in the noise NIS whose charge amount is a charge whose value is smaller than the threshold value QTh of the charge amount Q.

The φ-Q-N measurement board 100H5 can set the threshold value QTh of the quantity of charge Q based on the minimum value Min of the charge of the noise NIS and the width W of the charge of the noise NIS. According to the threshold value QTh of the amount of charge Q based on the minimum value Min of the electric charge of the noise NIS and the width W of the electric charge of the noise NIS, the φ-QN measuring board 100H5 calculates the trigger signal Can be output. Therefore, the partial discharge measuring apparatus 100 can sample the detection signal of the partial discharge from the detection signal of the alternating current including the low-frequency noise and the like.

In addition, the minimum value Min of the charge of the noise NIS and the width W of the charge of the noise NIS may change due to background noise varying from time to time. Therefore, the minimum value Min of the charge of the noise NIS and the width W of the charge of the noise NIS may be updated at predetermined time intervals. The minimum value Min of the electric charge of the noise NIS and the width W of the electric charge of the noise NIS can be updated so that the threshold value QTh of the electric charge quantity Q may be updated at a predetermined time interval.

≪ Embodiment 2 >

≪ Hardware configuration of partial discharge measuring device having a plurality of sensors >

15 is a block diagram for explaining an example of a hardware configuration of a partial discharge measuring apparatus having two measuring units according to an embodiment of the present invention.

The hardware configuration of Fig. 15 is different from the hardware configuration of Fig. 1 in that the partial discharge measuring apparatus 100 includes the sensor 100H21, the amplifier 100H22, the filter 100H23, and the detection processing circuit 100H24 The points are different. Hereinafter, different points will be mainly described.

Like the sensor 100H1, the sensor 100H21 is connected to a power facility such as a cable for measuring a partial discharge, and the sensor 100H21 measures an alternating current flowing through a power facility such as a cable. The output terminal of the sensor 100H21 is connected to the input terminal of the amplifier 100H22. The detection signal corresponding to the alternating current measured by the sensor 100H1 is set as the first detection signal SIG11 and the detection signal corresponding to the alternating current measured by the sensor 100H21 is set as the second detection signal SIG12.

The amplifier 100H22 amplifies the second detection signal SIG12 output from the sensor 100H21 in the same manner as the amplifier 100H2. The output terminal of the amplifier 100H22 is connected to the input terminal of the filter 100H23 and the input terminal of the waveform measurement board 100H6.

The filter 100H23 is a band-pass filter similar to the filter 100H3. The filter 100H23 extracts a signal of a specific frequency band from the second detection signal SIG12 amplified by the amplifier 100H22. The output terminal of the filter 100H23 is connected to the input terminal of the detection processing circuit 100H24.

The detection processing circuit 100H24 performs the detection processing on the second detection signal SIG12 in the same manner as the detection processing circuit 100H4. The output terminal of the detection processing circuit 100H24 is connected to the input terminal of the? -Q-N measurement board 100H5.

In the case of Fig. 15, the A / D converter 100H51 A / D converts the first detection signal SIG11 and the second detection signal SIG12.

The memory 100H52 stores various data and parameters used by the? -Q-N measurement board 100H5.

The hardware configuration shown in Fig. 15 is such that the detection signals of the two channels (Channel) of the first detection signal SIG11 and the second detection signal SIG12 are output to the? -Q-N measurement board 100H5. Similarly, in the hardware configuration of Fig. 15, the waveform measurement board 100H6 also has a configuration in which two detection signals of the first detection signal SIG11 and the second detection signal SIG12 are outputted.

In the case of FIG. 15, the? -Q-N measurement board 100H5 judges step S0206 under different output conditions for the first detection signal SIG11 and the second detection signal SIG12.

16 is a? -Q-N distribution diagram for explaining an example of a threshold value of the amount of charge Q in the case of a partial discharge measuring apparatus having two measuring units according to an embodiment of the present invention.

16A is a? -Q-N distribution diagram for explaining an example of the threshold value of the charge amount Q set for the charge measured by the first detection signal SIG11. 16B is a? -Q-N distribution diagram for explaining an example of the threshold value of the charge amount Q set for the charge measured by the second detection signal SIG12.

16 illustrates an example in which it is determined in step S0206 whether or not the output condition is satisfied, depending on whether or not the? -Q-N measurement board 100H5 has an electric charge equal to or larger than a threshold value of the electric charge quantity Q.

When the two-channel detection signal of the first detection signal SIG11 and the second detection signal SIG12 is output, in step S0204, the set value is the threshold value QTh11 of the charge amount Q of the first detection signal SIG11 and the charge amount Q Quot; QTh12 "

As shown in Figs. 16A and 16B, the threshold value QTh11 of the charge amount Q of the first detection signal SIG11 and the threshold value QTh12 of the charge amount Q of the second detection signal SIG12 are set to different values, respectively.

In the case where the two-channel detection signal of the first detection signal SIG11 and the second detection signal SIG12 is outputted, in the step S0206, the? -QN measurement board 100H5 determines whether or not the charge of the first detection signal SIG11 exceeds the threshold value Quot; QTh " or not. When the two-channel detection signal of the first detection signal SIG11 and the second detection signal SIG12 is output, in the step S0206, the? -QN measurement board 100H5 determines whether the charge of the second detection signal SIG12 is equal to the set charge amount Q Is determined to be equal to or larger than the threshold value QTh of each of the signals. In the case where the two-channel detection signal of the first detection signal SIG11 and the second detection signal SIG12 is output, in step S0206, the? -QN measurement board 100H5 judges whether or not the judgment relating to the first detection signal SIG11, It is judged that the output condition is satisfied (YES in step S0206) when it is determined that the charge is equal to or larger than the threshold value QTh of the charge amount Q in either of the judgments related to the detection signal SIG12. In the case where the two-channel detection signal of the first detection signal SIG11 and the second detection signal SIG12 is outputted, in the step S0207, the? -QN measurement board 100H5 detects that the charge of the first detection signal SIG11 is the first detection signal SIG11 Or when the charge of the second detection signal SIG12 is equal to or higher than the threshold value QTh12 of the charge amount Q of the second detection signal SIG12, the trigger signal SIG2 is output.

By setting the threshold value QTh11 of the charge amount Q of the first detection signal SIG11 and the threshold value QTh12 of the charge amount Q of the second detection signal SIG12 respectively, the? -QN measurement board 100H5 outputs the first detection signal SIG11 or the second detection signal SIG11, It is possible to output the trigger signal SIG2 when the charge of the partial discharge is outputted to either of the SIG12. Therefore, when partial discharge detection signal is output to either the first detection signal SIG11 or the second detection signal SIG12, the partial discharge measuring apparatus 100 samples the detection signal of the partial discharge from the output detection signal can do.

Here, the? -QN measuring board 100H5 is configured to determine whether the output condition is satisfied when either one of the first detection signal SIG11 and the second detection signal SIG12 becomes a threshold value or more, (OR) operation has been described, but the embodiment is not limited to the logical sum operation. The embodiment may be a so-called AND (AND) operation for determining that the output condition is satisfied for both the first detection signal SIG11 and the second detection signal SIG12 when both signals exceed the threshold value. Similarly, in the embodiment, when one of the signals is greater than or equal to the threshold value and the other signal is less than the threshold value, that is, both signals are judged for the first detection signal SIG11 and the second detection signal SIG12 (XOR) operation in which it is determined that the output condition is satisfied.

For example, in the case of outputting the trigger signal SIG2 based on the AND operation, in step S0207, when the charge of the first detection signal SIG11 is equal to or higher than the threshold value QTh11 of the charge amount Q of the first detection signal SIG11, If the charge of the second detection signal SIG12 further becomes equal to or higher than the threshold value QTh12 of the charge amount Q of the second detection signal SIG12 within a time period of one hour, the? -QN measurement board 100H5 is set to satisfy the output condition . Therefore, when one signal becomes equal to or larger than the threshold value and one signal becomes equal to or larger than the threshold value within a predetermined time, the? -Q-N measurement board 100H5 outputs the trigger signal SIG2.

For example, when the trigger signal SIG2 is output based on the exclusive-OR operation, in step S0207, when the charge of the first detection signal SIG11 is equal to or higher than the threshold value QTh11 of the charge amount Q of the first detection signal SIG11, If the charge of the second detection signal SIG12 is an electric charge that becomes less than the threshold value QTh12 of the electric charge amount Q of the second detection signal SIG12 within the predetermined time period, the? -QN measurement board 100H5 is set to satisfy the output condition . Therefore, when one of the signals becomes equal to or larger than the threshold value and one of the signals becomes less than the threshold value within the predetermined time, the? -Q-N measurement board 100H5 outputs the trigger signal SIG2.

When the trigger signal SIG2 is output based on the exclusive-OR operation and the charge Q becomes less than the threshold value QTh11 of the charge amount Q of the first detection signal SIG11 and the charge of the second detection signal SIG12 When the charge is equal to or higher than the threshold value QTh12 of the charge amount Q of the second detection signal SIG12, the? -QN measurement board 100H5 may determine that the output condition is satisfied.

The hardware configuration shown in Fig. 15 may be a filter in which the filter 100H3 and the filter 100H23 extract signals in the same frequency band. The hardware configuration shown in Fig. 15 may be a filter in which the filter 100H3 and the filter 100H23 extract signals of different frequency bands, respectively.

The partial discharge measuring apparatus 100 is a hardware configuration having two or more sensors. The partial discharge measuring apparatus 100 has a hardware configuration including two or more sensors, and has a threshold value of the amount of charge Q, a range of the phase?, A threshold of the occurrence frequency N, May be performed. Likewise, the partial discharge measuring apparatus 100 has a hardware configuration including two or more sensors. The partial discharge measuring apparatus 100 uses the threshold QTh11 of the charge amount Q of the first detection signal SIG11 and the threshold QTh12 of the charge amount Q of the second detection signal SIG12, A value calculated on the basis of the amount of charge Q of the capacitor C1 may be set.

The hardware configuration of the partial discharge measuring apparatus 100 is not limited to the hardware configuration shown in FIGS. 1 and 15. FIG. The partial discharge measuring apparatus 100 may have a hardware configuration having three or more sensors. In this case, in the embodiment, the φ-QN measurement board 100H5 performs an OR operation, a logical product operation, and an exclusive-OR operation on a detection signal of a plurality of sensors included in the partial discharge measuring apparatus 100, It is also possible to make a determination.

The partial discharge measuring apparatus 100 may be configured to have an information processing apparatus such as a PC. The partial discharge measuring apparatus 100 may be configured to perform part or all of the processing performed by, for example, the? -Q-N measuring board 100H5 and the waveform measuring board 100H6 by a PC or the like.

The digital filter process may be realized by processing by software when the partial discharge measuring apparatus 100 has an information processing apparatus such as a PC.

As described above, the partial discharge measuring apparatus for measuring the partial discharge occurring in the cable according to the exemplary embodiment of the present invention includes: a measuring unit for measuring an alternating current flowing through the cable and outputting a voltage value based on the alternating current as a detection signal; A distribution data generation section for generating distribution data indicating a distribution of the frequency of occurrence of the charge generated in the phase per unit time per unit time, the phase of the alternating current measured by the measurement section, And a signal output section for outputting a trigger signal when the alternating current satisfies an output condition based on at least one of the phase, the charge, and the occurrence frequency corresponding to the partial discharge with respect to the distribution data, When the trigger signal is outputted from the signal output section, The present invention is not limited to the specifically disclosed embodiments but can be variously modified and changed without departing from the scope of the claims of the invention Do.

100: Partial discharge measuring device
100H1, 100H21: Sensor 100H2, 100H22: Amplifier
100H3, 100H23: filter 100H4: detection processing circuit
100H5: φ-QN measurement board 100H51: A / D converter
100H52: Memory 100H53: MCU
100H531: Microprocessor 100H6: Waveform Measurement Board
100H61: A / D converter 100H62: Memory
100H63: MCU 100H631: Microprocessor
100H7: Sensor for phase detection 100H8: Phase signal processing circuit
101: PC SIG1, SIG1A: detection signal
SIG11: first detection signal SIG12: second detection signal
SIG2: Trigger signal SIG3: Sampling range
Q: charge amount?: Phase
N: occurrence frequency QTh: threshold value of charge amount Q
QTh11: the threshold value of the charge amount Q of the first detection signal SIG11
QTh12: the threshold value of the charge amount Q of the second detection signal SIG12
Pk1, Pk1A: Peak point T1A: Trigger timing
T2: Trigger preprocessing time T3: Post-trigger processing time
NIS: noise W: noise Width at which charge of NIS is obtained

Claims (9)

A partial discharge measuring apparatus for measuring a partial discharge occurring in a power facility,
A measuring unit for measuring an alternating current flowing in the electric power facility and outputting a voltage value based on the alternating current as a detection signal,
A distribution of the frequency of occurrences occurring per unit time of the electric charge obtained from the measurement of the alternating current obtained by the phase, the electric charge obtained by the phase, the phase of the applied high-voltage current or voltage measured by the measuring unit A distribution data generating unit for generating distribution data representing the distribution data,
A signal output section for outputting a trigger signal when the alternating current satisfies an output condition based on at least any one of the phase, the charge, and the occurrence frequency corresponding to the partial discharge in the distribution data;
And a sampling unit for sampling the detection signal output from the measurement unit when the trigger signal is output from the signal output unit,
And the partial discharge measuring device.
The method according to claim 1,
And a setting unit that sets, as the output condition, a threshold value of the charge corresponding to the partial discharge,
Wherein the signal output section outputs the trigger signal when the detection signal based on the alternating current corresponding to the partial discharge for which the charge equal to or higher than the threshold value set by the setting section is obtained is outputted
Partial discharge measuring device.
The method according to claim 1,
As the output condition, a setting section for setting a range of the phase corresponding to the partial discharge,
And the signal output section outputs the trigger signal when the detection signal based on the phase of the alternating current corresponding to the range set by the setting section is output
Partial discharge measuring device.
The method according to claim 1,
As the output condition, a setting unit for setting a threshold value of the occurrence frequency corresponding to the partial discharge,
Wherein the signal output unit outputs the trigger signal when the detection signal based on the alternating current that generates the frequency of occurrence of the frequency equal to or higher than the threshold set by the setting unit is outputted
Partial discharge measuring device.
3. The method of claim 2,
Wherein the measuring unit measures the alternating current of noise and outputs a voltage value based on the alternating current of the noise as a detection signal,
Wherein the distribution data generation unit generates the distribution data based on the phase of the alternating current of the noise measured by the measurement unit and the charge of the noise obtained by the phase of the alternating current of the noise and the alternating current And generating distribution data indicating the distribution of the frequency of occurrence of the noise generated per unit time of the charge of the noise obtained by the phase of the noise,
Wherein the setting unit calculates a minimum value of the charge of the noise obtained from the alternating current of the noise per unit time and a width at which the charge of the noise is obtained from the minimum value and adds a value obtained by adding the width to the minimum value, Set to the threshold
Partial discharge measuring device.
6. The method according to any one of claims 1 to 5,
And a filter unit that filters the predetermined frequency band to the detection signal output from the measurement unit to the distribution data generation unit,
Wherein the sampling unit performs digital filter processing on the detection signal in the frequency band
Partial discharge measuring device.
6. The method according to any one of claims 1 to 5,
And at least two measuring units,
Wherein the output condition is set for each of the detection signals output from each of the measurement units,
Wherein the signal output unit is configured to output at least one of the output conditions set for the detection signal and the output condition set for the detection signal, When one side is satisfied, a trigger signal is outputted
Partial discharge measuring device.
There is provided a partial discharge measuring method performed by a partial discharge measuring apparatus for measuring a partial discharge occurring in a power facility,
The partial discharge measuring apparatus comprising a measuring process of measuring an alternating current flowing in the electric power facility and outputting a voltage value based on the alternating current as a detection signal,
Wherein the partial discharge measuring apparatus is configured to measure an applied high-voltage current or voltage phase measured by the measuring means, an electric charge obtained in the phase, and an electric charge obtained from the measurement of the alternating current obtained in the phase, A distribution data generating process for generating distribution data indicating a distribution of occurrence frequencies that occur,
When the AC current satisfies an output condition based on at least one of the phase, the charge, and the occurrence frequency corresponding to the partial discharge in the distribution data, the partial discharge measuring apparatus generates a trigger signal A signal output process for outputting,
Wherein the partial discharge measuring apparatus performs sampling processing for sampling the detection signal outputted in the measurement processing when the trigger signal is outputted in the signal output processing
The partial discharge measuring method comprising:
A program recorded in a computer-readable storage medium for causing a partial discharge measuring apparatus for measuring a partial discharge occurring in a power facility to perform the measurement of the partial discharge,
The partial discharge measuring apparatus comprising a measuring process of measuring an alternating current flowing in the electric power facility and outputting a voltage value based on the alternating current as a detection signal,
Wherein the partial discharge measuring apparatus is configured to measure an applied high-voltage current or voltage phase measured by the measuring means, an electric charge obtained in the phase, and an electric charge obtained from the measurement of the alternating current obtained in the phase, A distribution data generating process for generating distribution data indicating a distribution of occurrence frequencies that occur,
When the AC current satisfies an output condition based on at least one of the phase, the charge, and the occurrence frequency corresponding to the partial discharge in the distribution data, the partial discharge measuring apparatus generates a trigger signal A signal output process for outputting,
Wherein the partial discharge measuring apparatus performs sampling processing for sampling the detection signal outputted in the measurement processing when the trigger signal is outputted in the signal output processing
A program recorded on a computer-readable storage medium for executing the program.
KR1020157029848A 2014-09-19 2014-09-19 Partial discharge measurement apparatus, partial discharge measurement method, and program KR101789900B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/074945 WO2016042675A1 (en) 2014-09-19 2014-09-19 Partial discharge measurement device, partial discharge measurement method, and program

Publications (2)

Publication Number Publication Date
KR20160058723A KR20160058723A (en) 2016-05-25
KR101789900B1 true KR101789900B1 (en) 2017-10-25

Family

ID=55532738

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020157029848A KR101789900B1 (en) 2014-09-19 2014-09-19 Partial discharge measurement apparatus, partial discharge measurement method, and program

Country Status (7)

Country Link
JP (1) JP6489651B2 (en)
KR (1) KR101789900B1 (en)
CN (1) CN105612428B (en)
HK (1) HK1221019A1 (en)
SG (1) SG11201508210YA (en)
TW (1) TWI586974B (en)
WO (1) WO2016042675A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230095386A (en) 2021-12-22 2023-06-29 한남대학교 산학협력단 Partial Discharge Diagnosis System Using Ultrasonic Measurement and Deep Learning Technique

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107544005B (en) * 2017-07-19 2020-07-10 华北电力大学 Method and device for determining time domain parameters of partial discharge current of high-voltage IGBT (insulated Gate Bipolar transistor)
WO2019182246A1 (en) * 2018-03-18 2019-09-26 Lg Electronics Inc. Partial discharge detecting system
JP7273482B2 (en) * 2018-11-07 2023-05-15 株式会社東芝 Partial discharge detection device, partial discharge detection method, partial discharge detection system, and computer program
JP7373277B2 (en) * 2018-12-25 2023-11-02 株式会社明電舎 Partial discharge detection device and partial discharge detection method
JP7373275B2 (en) * 2018-12-25 2023-11-02 株式会社明電舎 Partial discharge detection device and partial discharge detection method
JP7373276B2 (en) * 2018-12-25 2023-11-02 株式会社明電舎 Partial discharge detection device and partial discharge detection method
JP7373274B2 (en) * 2018-12-25 2023-11-02 株式会社明電舎 Partial discharge detection device and partial discharge detection method
CN110866340B (en) * 2019-11-18 2022-02-01 广东电网有限责任公司广州供电局 Partial discharge data processing method and device, storage medium and computer equipment
CN111141998A (en) * 2019-12-20 2020-05-12 国网浙江海盐县供电有限公司 10kV high-voltage cable alternating-current withstand voltage and partial discharge test system and method
JP7412392B2 (en) * 2021-08-06 2024-01-12 株式会社日立製作所 Partial discharge determination device and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001183411A (en) 1999-12-27 2001-07-06 Mitsubishi Electric Corp Partial discharge measuring system, partial discharge measuring device, voltage phase measuring device, and partial discharge measuring method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2941961B2 (en) * 1990-12-26 1999-08-30 株式会社フジクラ Method and apparatus for detecting partial discharge of load break elbow
JPH06331686A (en) * 1993-05-24 1994-12-02 Furukawa Electric Co Ltd:The Insulation deterioration monitoring system
US6313640B1 (en) * 1998-02-03 2001-11-06 Abb Power T & D Company, Inc. System and method for diagnosing and measuring partial discharge
JP4256492B2 (en) * 1998-06-10 2009-04-22 東芝電機サービス株式会社 Partial discharge monitoring device for rotating electrical machines
KR100577347B1 (en) * 2004-02-20 2006-05-10 한국 전기안전공사 Detector for gis and detecting method thereof
WO2012059983A1 (en) * 2010-11-02 2012-05-10 三菱電機株式会社 Power source device and programmable controller
JP6134101B2 (en) * 2012-03-14 2017-05-24 東芝三菱電機産業システム株式会社 Partial discharge measurement system and partial discharge measurement method using repetitive impulse voltage
TW201416682A (en) * 2012-10-30 2014-05-01 Taiwan Power Co Method, system, and apparatus for detecting high-voltage feeder power phase

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001183411A (en) 1999-12-27 2001-07-06 Mitsubishi Electric Corp Partial discharge measuring system, partial discharge measuring device, voltage phase measuring device, and partial discharge measuring method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230095386A (en) 2021-12-22 2023-06-29 한남대학교 산학협력단 Partial Discharge Diagnosis System Using Ultrasonic Measurement and Deep Learning Technique

Also Published As

Publication number Publication date
CN105612428A (en) 2016-05-25
CN105612428B (en) 2018-10-23
JPWO2016042675A1 (en) 2017-07-13
WO2016042675A1 (en) 2016-03-24
SG11201508210YA (en) 2016-04-28
HK1221019A1 (en) 2017-05-19
TW201612534A (en) 2016-04-01
KR20160058723A (en) 2016-05-25
JP6489651B2 (en) 2019-03-27
TWI586974B (en) 2017-06-11

Similar Documents

Publication Publication Date Title
KR101789900B1 (en) Partial discharge measurement apparatus, partial discharge measurement method, and program
KR101051099B1 (en) Microwave partial discharge and discharge position measuring device of high voltage power equipment
CN102792173B (en) Instrument and method for detecting partial electrical discharges
JP5228558B2 (en) Partial discharge detection device by electromagnetic wave detection and detection method thereof
EP2406643B1 (en) Time domain electromagnetic interference monitoring method and system
KR102244716B1 (en) Apparatus for analyzing pattern of partial discharge and detecting location of partial discharge
CN113366327B (en) Lightning arrester resistive leakage current detection device and detection method thereof
JP6821495B2 (en) Partial discharge measurement system and partial discharge measurement method
US10928436B2 (en) Evaluation of phase-resolved partial discharge
CN102792174B (en) Instrument and method for detecting partial electrical discharges
EP2183608B1 (en) Instrument and a method for detecting partial electrical discharges occurring in an electric apparatus
JP5539762B2 (en) Lightning arrester failure determination method
JP2006220629A (en) Internal impedance measuring device for storage battery, and internal impedance measuring method of the storage battery
JP2011237182A (en) Device and method for determining partial discharge
JP2007292700A (en) Partial discharge position specifying method of stationary induction apparatus
KR101579896B1 (en) System and Method for Analyzing Cable State using Multi Band Signal
JPH05240902A (en) Method for measuring partial discharge
US20100060290A1 (en) Identification of power system primary arcs based on pulse density
CN111751676A (en) Detection system and method capable of distinguishing partial discharge signals of transformer and sleeve
JP7009809B2 (en) Partial discharge detection device and partial discharge detection method by ground wire current method
KR101882945B1 (en) Real Time Insulation of Electronical installation Inspect System
JP2011099775A (en) Partial discharge current measuring system
KR101515232B1 (en) A processing apparatus and method of partial discharge diagnosis for gas insulated switchgear
JP2020101488A (en) Partial discharge detector and partial discharge detection method
JP2020101490A (en) Partial discharge detector and partial discharge detection method

Legal Events

Date Code Title Description
A201 Request for examination
N231 Notification of change of applicant
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant