WO2023210048A1 - Partial discharge detector - Google Patents
Partial discharge detector Download PDFInfo
- Publication number
- WO2023210048A1 WO2023210048A1 PCT/JP2022/042571 JP2022042571W WO2023210048A1 WO 2023210048 A1 WO2023210048 A1 WO 2023210048A1 JP 2022042571 W JP2022042571 W JP 2022042571W WO 2023210048 A1 WO2023210048 A1 WO 2023210048A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- partial discharge
- sensor
- detection device
- discharge detection
- ground voltage
- Prior art date
Links
- 230000001052 transient effect Effects 0.000 claims abstract description 20
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 2
- 230000002123 temporal effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 15
- 239000012212 insulator Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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
Definitions
- the present invention relates to a partial discharge detection device.
- the switchboard is configured to ensure safety by interrupting the current with a circuit breaker in the event of an accident, and if a failure due to deterioration occurs, the ripple effects will be wide-ranging, so diagnosis is required.
- Patent Document 1 discloses a technique for a partial discharge detection device that detects partial discharge generated in power equipment with high sensitivity. However, Patent Document 1 does not consider whether partial discharge occurs inside or outside the power equipment.
- An object of the present invention is to provide a partial discharge detection device that can detect the occurrence of partial discharge inside an object whose partial discharge is to be detected.
- a preferred example of the present invention is a partial discharge detection device for detecting partial discharge in an object, which includes: a first sensor for measuring a transient ground voltage placed on a grounded conductor;
- the partial discharge detection device includes a second sensor that measures ground voltage, and an output unit that outputs the presence or absence of partial discharge in the object based on signals from the first sensor and the second sensor.
- FIG. 2 is a diagram showing the configuration of a switchboard according to the first embodiment.
- 3 is a diagram showing a graph of a sensor signal of Example 1.
- FIG. 7 is a diagram showing a graph obtained by Fourier transforming the signal of Example 2.
- Example 1 will be explained using FIGS. 1 and 2.
- the switchboard 4 of this embodiment has a circuit breaker 1 arranged therein, and has a structure covered by a metal container 9, and the metal container 9 is grounded.
- the circuit breaker 1 is connected by a cable (power transmission side) 2 and a cable (power distribution side) 3.
- a sensor 6 (disposed outside the metal container) capable of measuring transient ground voltage is arranged outside the metal container 9. Further, a sensor 7 (disposed on the grounded metal plate) capable of measuring a transient ground voltage is also disposed on a grounded metal plate 8 disposed outside the switchboard. Signals from a sensor (placed on the outside of the metal container) 6 and a sensor (placed on a grounded metal plate) 7 are measured with an oscilloscope 5.
- an induced current 41 flows through the external partial discharge 12 generated in the insulator 21, and signals are acquired by a sensor (placed on the outside of the metal container) 6 and a sensor (placed on a grounded metal plate) 7. Therefore, as shown in Fig. 2, when a partial discharge 11 occurs inside, a signal is generated only from the sensor (placed outside the metal container), but when a partial discharge occurs outside, a signal is generated from the sensor (placed outside the metal container). Signals are generated both at the sensor (located on the outside) 6 and at the sensor (located on the grounded metal plate) 7.
- the vertical axis shows the transient ground voltage V detected by the sensor 6, and the horizontal axis shows time t.
- the vertical axis indicates the transient ground voltage V detected by the sensor 7, and the horizontal axis indicates time t.
- the upper diagram in FIG. 2 and the lower diagram in FIG. 2 show cases where a partial discharge occurs inside the switchboard 4 and then a partial discharge occurs outside the switchboard 4.
- the temporal changes in the signals in the upper diagram of FIG. 2 and the lower diagram of FIG. 2 can be observed with the oscilloscope 5. From the output of the signal that can be observed with the oscilloscope 5, the user can detect the presence or absence of partial discharge inside the switchboard.
- FIG. 1 shows an example using one switchboard 4, sensors 6 and 7, and one oscilloscope 5 that outputs signals from the sensors 6 and 7.
- the present invention is not limited to this example, and two sensors may be arranged in each of the plurality of switchboards 4, and the output unit for determining the presence or absence of partial discharge in each of the plurality of switchboards 4 may be configured by a computer.
- This computer is a server connected to sensors of a plurality of switchboards 4, and is configured as a data center that determines whether a partial discharge occurring in the switchboard 4 is an internal partial discharge or an external partial discharge. You can also do this.
- the presence or absence of partial discharge inside the switchboard can be automatically determined by comparing the timing of generation of the transient ground voltage generated by the above-described sensor 6 and sensor 7.
- the determination result is not limited to outputting the time change of the signal, but also includes information such as the presence or absence of internal partial discharge, the time of occurrence of internal partial discharge, and the number of past occurrences of internal partial discharge. may be displayed on the monitor.
- the insulator 21 is shown as an example, and may be any location where a partial discharge occurs outside the switchboard. Therefore, since it is necessary to arrange the sensor 7 (placed on a grounded metal plate) at each location where partial discharge occurs, it is assumed that a plurality of sensors 7 are often installed.
- Example 2 will be explained using FIG. 3. Note that descriptions of parts that overlap with those in Example 1 will be omitted here.
- Example 1 there were cases where determination could not be made due to the influence of noise, so in this example, a configuration was adopted in which partial discharge was detected while reducing the influence of noise.
- the upper diagram in FIG. 3 shows a graph obtained by Fourier transform of the signal detected by sensor 6 or sensor 7 in the case where partial discharge occurs in the switchboard.
- the lower diagram in FIG. 3 shows a graph obtained by Fourier transform of the signal detected by sensor 6 or sensor 7 in the case where no partial discharge occurs in the switchboard.
- the vertical axis shows amplitude and the horizontal axis shows frequency.
- the frequency bands differ between when partial discharge occurs and where partial discharge does not occur. As shown in the upper diagram of FIG. 3, the frequency band of partial discharge occurs at a lower frequency than the frequency band of noise. Therefore, the occurrence of partial discharge can be ascertained by determining the difference in frequency bands.
- the configuration is such that the frequency band of noise in the switchboard is detected and the signal from the sensor 6 or sensor 7 is passed through a filter (notch filter) that removes the frequency band of the noise.
- the structure is such that the signal from the sensor 6 or the sensor 7 is passed through a filter that passes only the signal in the partial discharge frequency band.
- the signal from sensor 6 or sensor 7 from which noise has been removed is sent to the oscilloscope or determination server as in embodiment 1, and the noise is removed.
- the presence or absence of partial discharge inside the switchboard can be detected with less influence.
- a switchboard was used as an example of an object for detecting partial discharge, but the present invention can be applied to detecting partial discharge in other objects such as a gas circuit breaker.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
A partial discharge detector for detecting partial discharge in an object, wherein the partial discharge detector includes: a first sensor that is arranged on a grounded conductor and measures transient ground voltage; a second sensor that is arranged on an object and measures transient ground voltage; and an output unit that uses the signals from the first sensor and the second sensor as a basis to output whether there is partial discharge in the object.
Description
本発明は、部分放電検出装置に関する。
The present invention relates to a partial discharge detection device.
配電盤は、事故時に遮断器で電流を遮断することで安全を担保する構成となっており、劣化による故障が発生すると波及効果が広いため診断が求められている。
The switchboard is configured to ensure safety by interrupting the current with a circuit breaker in the event of an accident, and if a failure due to deterioration occurs, the ripple effects will be wide-ranging, so diagnosis is required.
特許文献１は、電力機器で発生する部分放電を高感度で検出する部分放電検出装置の技術を開示している。しかしながら、特許文献１では、電力機器の内部で部分放電が発生したのか外部で部分放電が発生したのかについては配慮をしていない。
Patent Document 1 discloses a technique for a partial discharge detection device that detects partial discharge generated in power equipment with high sensitivity. However, Patent Document 1 does not consider whether partial discharge occurs inside or outside the power equipment.
本発明の目的は、部分放電を検出したい対象物の内部において、部分放電が発生したことを検出できる部分放電検出装置を提供する。
An object of the present invention is to provide a partial discharge detection device that can detect the occurrence of partial discharge inside an object whose partial discharge is to be detected.
本発明の好ましい一例は、対象物の部分放電を検出する部分放電検出装置であって、接地した導体に配置された過渡接地電圧を測定する第１のセンサと、前記対象物に配置された過渡接地電圧を測定する第２のセンサと、第１のセンサと第２のセンサからの信号に基づいて、前記対象物内の部分放電の有無を出力する出力部とを有する部分放電検出装置である。
A preferred example of the present invention is a partial discharge detection device for detecting partial discharge in an object, which includes: a first sensor for measuring a transient ground voltage placed on a grounded conductor; The partial discharge detection device includes a second sensor that measures ground voltage, and an output unit that outputs the presence or absence of partial discharge in the object based on signals from the first sensor and the second sensor. .
本発明によれば、部分放電を検出したい対象物の内部において、部分放電が発生したことを検出できる。
According to the present invention, it is possible to detect that a partial discharge has occurred inside an object whose partial discharge is to be detected.
以下、本発明を実施する上で好適となる実施例について図面を用いて説明する。尚、下記はあくまでも実施の例に過ぎず、発明の内容が下記具体的態様に限定されるものではない。本発明は、下記態様を含めて種々の態様に変形することが無論可能である。
Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. Note that the following is merely an example of implementation, and the content of the invention is not limited to the specific embodiments described below. It goes without saying that the present invention can be modified into various embodiments including the following embodiments.
実施例１について図１、図２を用いて説明する。
Example 1 will be explained using FIGS. 1 and 2.
図１に示す如く、本実施例の配電盤４は遮断器１を配置しており、金属容器９に覆われた構造となっており、金属容器９は接地されている。遮断器１はケーブル（送電側）２とケーブル（配電側）３でつながっている。
As shown in FIG. 1, the switchboard 4 of this embodiment has a circuit breaker 1 arranged therein, and has a structure covered by a metal container 9, and the metal container 9 is grounded. The circuit breaker 1 is connected by a cable (power transmission side) 2 and a cable (power distribution side) 3.
金属容器９の外側には過渡接地電圧を測定できるセンサ（金属容器の外側に配置）６が配置されている。また、配電盤の外部に配置した接地した金属板８にも過渡接地電圧を測定できるセンサ（接地した金属板に配置）７が配置されている。センサ（金属容器の外側に配置）６とセンサ（接地した金属板に配置）７の信号はオシロスコープ５で測定する。
A sensor 6 (disposed outside the metal container) capable of measuring transient ground voltage is arranged outside the metal container 9. Further, a sensor 7 (disposed on the grounded metal plate) capable of measuring a transient ground voltage is also disposed on a grounded metal plate 8 disposed outside the switchboard. Signals from a sensor (placed on the outside of the metal container) 6 and a sensor (placed on a grounded metal plate) 7 are measured with an oscilloscope 5.
配電盤４の内部で部分放電１１が発生した場合、部分放電１１により発生する電磁波３１によって金属容器９に表面電流４０が流れセンサ（金属容器の外側に配置）６で信号が取得される。
When a partial discharge 11 occurs inside the switchboard 4, a surface current 40 flows through the metal container 9 due to electromagnetic waves 31 generated by the partial discharge 11, and a signal is acquired by a sensor (disposed outside the metal container) 6.
また、碍子２１で発生した外部の部分放電１２は誘導電流４１が流れて、センサ（金属容器の外側に配置）６とセンサ（接地した金属板に配置）７で信号が取得される。そのため、図２で示すように内部で部分放電１１が発生した場合はセンサ（金属容器の外側に配置）６のみで信号が発生するが、外部で部分放電が発生した場合はセンサ（金属容器の外側に配置）６とセンサ（接地した金属板に配置）７の両方で信号が発生する。
Further, an induced current 41 flows through the external partial discharge 12 generated in the insulator 21, and signals are acquired by a sensor (placed on the outside of the metal container) 6 and a sensor (placed on a grounded metal plate) 7. Therefore, as shown in Fig. 2, when a partial discharge 11 occurs inside, a signal is generated only from the sensor (placed outside the metal container), but when a partial discharge occurs outside, a signal is generated from the sensor (placed outside the metal container). Signals are generated both at the sensor (located on the outside) 6 and at the sensor (located on the grounded metal plate) 7.
図２の上段の図は、縦軸がセンサ６で検出した過渡接地電圧Ｖで横軸が時間tを示す図である。図２の下段の図は、縦軸がセンサ７で検出した過渡接地電圧Ｖで横軸が時間tを示す図である。図２の上段の図や図２の下段の図では、配電盤４の内部で部分放電が生じ、その後、配電盤４の外部で部分放電が生じた場合を示している。
In the upper diagram of FIG. 2, the vertical axis shows the transient ground voltage V detected by the sensor 6, and the horizontal axis shows time t. In the lower diagram of FIG. 2, the vertical axis indicates the transient ground voltage V detected by the sensor 7, and the horizontal axis indicates time t. The upper diagram in FIG. 2 and the lower diagram in FIG. 2 show cases where a partial discharge occurs inside the switchboard 4 and then a partial discharge occurs outside the switchboard 4.
図２の下段の図に示すように、配電盤４の外部で部分放電が生じた場合には、過渡接地電圧の一時的な上昇が発生することを示している。センサ７で検出した過渡接地電圧の一時的な上昇は、センサ６で検出した過渡接地電圧の一時的な上昇とほぼ同じ時刻に発生する。センサ６とセンサ７で発生する過渡接地電圧の一時的な上昇は、配電盤４の外部での放電に起因する誘導電流４１が、センサ６やセンサ７に伝わる信号の遅れにより生じる。そのため、その時間差は、ほぼ同じ時刻である。配電盤４の内部で部分放電が生じた場合には、センサ７では検出できないので、図２の上段の図では、配電盤４の内部で部分放電に起因した過渡接地電圧の一時的な上昇が発生する。図２の下段の図では、配電盤４の内部で部分放電に起因した過渡接地電圧の一時的な上昇は見られない。内部放電で生じる表面電流４０は外部放電で生じる誘導電流４１に比べて小さいため、センサ６では、表面電流４０による過渡接地電圧は検出できるが、センサ７では、その過渡接地電圧は検出できないと推定される。
As shown in the lower diagram of FIG. 2, when a partial discharge occurs outside the switchboard 4, a temporary rise in the transient ground voltage occurs. The temporary rise in the transient ground voltage detected by the sensor 7 occurs at approximately the same time as the temporary rise in the transient ground voltage detected by the sensor 6. The temporary rise in the transient ground voltage generated at the sensor 6 and the sensor 7 is caused by a delay in the signal transmitted to the sensor 6 and the sensor 7 by the induced current 41 caused by discharge outside the switchboard 4 . Therefore, the time difference is approximately the same time. If a partial discharge occurs inside the switchboard 4, it cannot be detected by the sensor 7, so in the upper diagram of FIG. 2, a temporary rise in the transient ground voltage due to the partial discharge occurs inside the switchboard 4. . In the lower diagram of FIG. 2, no temporary rise in the transient ground voltage due to partial discharge inside the switchboard 4 is observed. Since the surface current 40 generated by the internal discharge is smaller than the induced current 41 generated by the external discharge, it is estimated that the sensor 6 can detect the transient ground voltage due to the surface current 40, but the sensor 7 cannot detect the transient ground voltage. be done.
図２の上段の図や、図２の下段の図の信号の時間変化は、オシロスコープ５で、観察できる。オシロスコープ５で観察できる信号の出力から、利用者は、配電盤の内部での部分放電の有無を検出できる。
The temporal changes in the signals in the upper diagram of FIG. 2 and the lower diagram of FIG. 2 can be observed with the oscilloscope 5. From the output of the signal that can be observed with the oscilloscope 5, the user can detect the presence or absence of partial discharge inside the switchboard.
図１では、１つの配電盤４と、センサ６とセンサ７と、センサ６とセンサ７からの信号を出力する１台のオシロスコープ５を使った例を示している。この例に限らず、複数の配電盤４のそれぞれに、２つのセンサを配置し、複数の配電盤４のそれぞれの部分放電の有無を判定する出力部を、コンピュータで構成するようにしてもよい。
FIG. 1 shows an example using one switchboard 4, sensors 6 and 7, and one oscilloscope 5 that outputs signals from the sensors 6 and 7. The present invention is not limited to this example, and two sensors may be arranged in each of the plurality of switchboards 4, and the output unit for determining the presence or absence of partial discharge in each of the plurality of switchboards 4 may be configured by a computer.
このコンピュータは、複数の配電盤４のセンサと接続したサーバであり、配電盤４で生じた部分放電が、内部での部分放電なのか、外部での部分放電なのかを判定するデータセンタとして構成するようにしてもよい。配電盤の内部での部分放電の有無の判定は、上記したセンサ６とセンサ７で発生する過渡接地電圧の発生のタイミングを比較することで、自動的に判定できる。例えば、その判定結果は、信号の時間変化を出力することに限らず、内部の部分放電の有無や、内部の部分放電の発生時刻や、過去の内部の部分放電の発生回数などを伴った情報をモニターに表示するようにしてもよい。
This computer is a server connected to sensors of a plurality of switchboards 4, and is configured as a data center that determines whether a partial discharge occurring in the switchboard 4 is an internal partial discharge or an external partial discharge. You can also do this. The presence or absence of partial discharge inside the switchboard can be automatically determined by comparing the timing of generation of the transient ground voltage generated by the above-described sensor 6 and sensor 7. For example, the determination result is not limited to outputting the time change of the signal, but also includes information such as the presence or absence of internal partial discharge, the time of occurrence of internal partial discharge, and the number of past occurrences of internal partial discharge. may be displayed on the monitor.
このように、センサ６からの信号とセンサ７からの信号から、上記の差を認識することで部分放電が発生している場所が配電盤の内部で生じたのか外部で生じたのかを判定することができる。
In this way, by recognizing the above-mentioned difference from the signal from sensor 6 and the signal from sensor 7, it is possible to determine whether the partial discharge is occurring inside or outside the switchboard. I can do it.
内部で発生した部分放電１１の電磁波３１は金属容器で遮蔽されるため、センサ（接地した金属板に配置）７への影響がない。
Since the electromagnetic waves 31 of the partial discharge 11 generated inside are shielded by the metal container, there is no effect on the sensor (placed on a grounded metal plate) 7.
なお、碍子２１は一例として示しており、配電盤の外部で発生する部分放電場所であればどこでも良い。そのため、センサ（接地した金属板に配置）７は部分放電が発生する箇所毎に配置する必要があるため、複数の設置する場合が多いと想定される。
Note that the insulator 21 is shown as an example, and may be any location where a partial discharge occurs outside the switchboard. Therefore, since it is necessary to arrange the sensor 7 (placed on a grounded metal plate) at each location where partial discharge occurs, it is assumed that a plurality of sensors 7 are often installed.
本実施例によれば、配電盤の内部で発生した部分放電を検出でき、それにより、絶縁劣化を診断することができる。
According to this embodiment, it is possible to detect the partial discharge that occurs inside the switchboard, thereby making it possible to diagnose insulation deterioration.
実施例２について図３を用いて説明する。尚、実施例１と重複する箇所については、ここでの説明を省略する。
Example 2 will be explained using FIG. 3. Note that descriptions of parts that overlap with those in Example 1 will be omitted here.
実施例1ではノイズの影響で判定できない場合があるため、本実施例では、ノイズの影響を少なくして部分放電を検出する構成とした。
In Example 1, there were cases where determination could not be made due to the influence of noise, so in this example, a configuration was adopted in which partial discharge was detected while reducing the influence of noise.
配電盤に部分放電が発生した場合であって、センサ６またはセンサ７で検出した信号をフーリエ変換したグラフを、図３の上段の図に示す。
The upper diagram in FIG. 3 shows a graph obtained by Fourier transform of the signal detected by sensor 6 or sensor 7 in the case where partial discharge occurs in the switchboard.
配電盤に部分放電が発生しない場合であって、センサ６またはセンサ７で検出した信号をフーリエ変換したグラフを、図３の下段の図に示す。
The lower diagram in FIG. 3 shows a graph obtained by Fourier transform of the signal detected by sensor 6 or sensor 7 in the case where no partial discharge occurs in the switchboard.
図３は、縦軸に振幅、横軸に周波数を示す。
In FIG. 3, the vertical axis shows amplitude and the horizontal axis shows frequency.
センサ６やセンサ７で取得した信号波形をフーリエ変換すると、部分放電が発生した場合と部分放電が発生していない場所で周波数帯域が異なる。図３の上段の図に示すように、部分放電の周波数帯域は、ノイズの周波数帯域よりも低い周波数に発生する。そのため、周波数帯域の差を判定することで部分放電の発生を把握することができる。
When the signal waveforms acquired by sensor 6 and sensor 7 are Fourier-transformed, the frequency bands differ between when partial discharge occurs and where partial discharge does not occur. As shown in the upper diagram of FIG. 3, the frequency band of partial discharge occurs at a lower frequency than the frequency band of noise. Therefore, the occurrence of partial discharge can be ascertained by determining the difference in frequency bands.
そこで、配電盤におけるノイズの周波数帯域を検出しておき、ノイズの周波数帯域を除くようなフィルタ（ノッチフィルタ）に、センサ６またはセンサ７からの信号を通過させるような構成とする。もしくは、部分放電の周波数帯域の信号のみを通過させるようなフィルタに、センサ６またはセンサ７からの信号を通過させるような構成とする。
Therefore, the configuration is such that the frequency band of noise in the switchboard is detected and the signal from the sensor 6 or sensor 7 is passed through a filter (notch filter) that removes the frequency band of the noise. Alternatively, the structure is such that the signal from the sensor 6 or the sensor 7 is passed through a filter that passes only the signal in the partial discharge frequency band.
そのような構成を追加することで、本実施例では、ノイズを除いたセンサ６もしくはセンサ７からの信号を、実施例１のようなオシロスコープや、判定用のサーバに、信号を送り、ノイズの影響を少なくして、配電盤の内部での部分放電の有無を、検出できる。
By adding such a configuration, in this embodiment, the signal from sensor 6 or sensor 7 from which noise has been removed is sent to the oscilloscope or determination server as in embodiment 1, and the noise is removed. The presence or absence of partial discharge inside the switchboard can be detected with less influence.
上記した実施例では、部分放電を検出する対象物として配電盤を例にして説明をしたが、ガス遮断器などの他の対象物の部分放電を検出することに適用することができる。
In the above-described embodiments, a switchboard was used as an example of an object for detecting partial discharge, but the present invention can be applied to detecting partial discharge in other objects such as a gas circuit breaker.
１…遮断器、２…ケーブル（送電側）、３…ケーブル（配電側）、４…配電盤、５…オシロスコープ、６…センサ（金属容器の外側に配置）、７…センサ（接地した金属板に配置）、８…接地した金属板、９…金属容器、１１…内部の部分放電、１２…外部の部分放電、２１…碍子、２２…高電圧の配線、３１…電磁波、４０…表面電流、４１…誘導電流
1...Breaker, 2...Cable (power transmission side), 3...Cable (power distribution side), 4...Switching board, 5...Oscilloscope, 6...Sensor (placed outside the metal container), 7...Sensor (placed on the grounded metal plate) arrangement), 8...grounded metal plate, 9...metal container, 11...internal partial discharge, 12...external partial discharge, 21...insulator, 22...high voltage wiring, 31...electromagnetic wave, 40...surface current, 41 …induced current
Claims (7)
- 対象物の部分放電を検出する部分放電検出装置であって、
接地した導体に配置された過渡接地電圧を測定する第１のセンサと、
前記対象物に配置された過渡接地電圧を測定する第２のセンサと、
第１のセンサと第２のセンサからの信号に基づいて、前記対象物内の部分放電の有無を出力する出力部とを有する部分放電検出装置。 A partial discharge detection device for detecting partial discharge in a target,
a first sensor for measuring a transient ground voltage disposed on a grounded conductor;
a second sensor disposed on the object that measures a transient ground voltage;
A partial discharge detection device comprising: an output section that outputs the presence or absence of partial discharge in the object based on signals from a first sensor and a second sensor. - 請求項１に記載の部分放電検出装置において、
前記対象物は、金属容器で覆われ、
第１のセンサおよび第２のセンサは、前記対象物の外部に配置される部分放電検出装置。 The partial discharge detection device according to claim 1,
the object is covered with a metal container;
The first sensor and the second sensor are partial discharge detection devices arranged outside the object. - 請求項１に記載の部分放電検出装置において、
前記出力部は、
第１のセンサと第２のセンサからの信号の時間変化を出力する部分放電検出装置。 The partial discharge detection device according to claim 1,
The output section is
A partial discharge detection device that outputs temporal changes in signals from a first sensor and a second sensor. - 請求項１に記載の部分放電検出装置において、
前記出力部は、
前記対象物内の部分放電の有無を判定し、判定結果を出力する部分放電検出装置。 The partial discharge detection device according to claim 1,
The output section is
A partial discharge detection device that determines the presence or absence of partial discharge within the object and outputs a determination result. - 請求項１に記載の部分放電検出装置において、
前記出力部は、
第１のセンサと第２のセンサからの信号から、ノイズの周波数帯域を除く処理をして、
前記対象物内の部分放電の有無を出力する部分放電検出装置。 The partial discharge detection device according to claim 1,
The output section is
Processing is performed to remove the noise frequency band from the signals from the first sensor and the second sensor,
A partial discharge detection device that outputs the presence or absence of partial discharge within the object. - 請求項１に記載の部分放電検出装置において、
前記対象物は、配電盤もしくは、ガス遮断器である部分放電検出装置。 The partial discharge detection device according to claim 1,
The target object is a partial discharge detection device that is a switchboard or a gas circuit breaker. - 対象物の部分放電を検出する部分放電検出方法であって、
過渡接地電圧線を測定する第１のセンサが接地した導体に配置され、
過渡接地電圧線を測定する第２のセンサが前記対象物に配置され、
第１のセンサと第２のセンサからの信号に基づいて、前記対象物内の部分放電の有無を出力する部分放電検出方法。 A partial discharge detection method for detecting partial discharge in an object, the method comprising:
a first sensor for measuring a transient ground voltage line is disposed on the grounded conductor;
a second sensor for measuring a transient ground voltage line is disposed on the object;
A partial discharge detection method that outputs the presence or absence of partial discharge in the object based on signals from a first sensor and a second sensor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022075511A JP2023164157A (en) | 2022-04-28 | 2022-04-28 | Partial discharge detection device |
| JP2022-075511 | 2022-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023210048A1 true WO2023210048A1 (en) | 2023-11-02 |
Family
ID=88518202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2022/042571 WO2023210048A1 (en) | 2022-04-28 | 2022-11-16 | Partial discharge detector |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2023164157A (en) |
| WO (1) | WO2023210048A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459674A (en) * | 2018-12-28 | 2019-03-12 | 国家电网有限公司 | A kind of partial discharge of switchgear multinode monitoring system synchronization device |
| JP2019135455A (en) * | 2018-02-05 | 2019-08-15 | 日新電機株式会社 | Partial discharge detector using multi-sensor |
| JP2020012726A (en) * | 2018-07-18 | 2020-01-23 | 株式会社東芝 | Partial discharge detection system, learning system, method for detecting partial discharge, computer program, and electric apparatus |
| JP2021025881A (en) * | 2019-08-06 | 2021-02-22 | Ｊｆｅスチール株式会社 | Partial discharge detection device and partial discharge monitoring system |
| JP2022032335A (en) * | 2020-08-11 | 2022-02-25 | 株式会社東芝 | Transformer and partial discharge determination method |
-
2022
- 2022-04-28 JP JP2022075511A patent/JP2023164157A/en active Pending
- 2022-11-16 WO PCT/JP2022/042571 patent/WO2023210048A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019135455A (en) * | 2018-02-05 | 2019-08-15 | 日新電機株式会社 | Partial discharge detector using multi-sensor |
| JP2020012726A (en) * | 2018-07-18 | 2020-01-23 | 株式会社東芝 | Partial discharge detection system, learning system, method for detecting partial discharge, computer program, and electric apparatus |
| CN109459674A (en) * | 2018-12-28 | 2019-03-12 | 国家电网有限公司 | A kind of partial discharge of switchgear multinode monitoring system synchronization device |
| JP2021025881A (en) * | 2019-08-06 | 2021-02-22 | Ｊｆｅスチール株式会社 | Partial discharge detection device and partial discharge monitoring system |
| JP2022032335A (en) * | 2020-08-11 | 2022-02-25 | 株式会社東芝 | Transformer and partial discharge determination method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023164157A (en) | 2023-11-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4975800A (en) | Contact abnormality detecting system | |
| EP2442121B1 (en) | Acoustic sensor system, acoustic signature simulator, and electrical distribution system | |
| JP6910897B2 (en) | Partial discharge detection device and partial discharge detection method | |
| JP2006170815A (en) | Partial discharge diagnostic method and system of gas insulating apparatus | |
| JP6116952B2 (en) | Partial discharge monitoring system and partial discharge monitoring method | |
| JP2012058046A (en) | Abnormality diagnosis device for power device | |
| KR102192609B1 (en) | High voltage distributing board, low voltage distributing board, distributing board, motor control board having monitoring watching function using induced voltage sensor | |
| KR102140059B1 (en) | A Defect-Detection System and its Detection Method for the Joint of Cable Termination for the EHV Underground Transmission Lines, Partial Discharge Sensing Apparatus | |
| CN109596956B (en) | DC series arc detection method and device | |
| Raja et al. | Comparative investigations on UHF and acoustic PD detection sensitivity in transformers | |
| WO2023210048A1 (en) | Partial discharge detector | |
| JP2010230497A (en) | Insulation deterioration diagnostic device of high voltage power receiving facility | |
| JP6118627B2 (en) | Vacuum leak monitoring device for vacuum valve | |
| KR101308003B1 (en) | Mehthod of arc detection based on wavelet | |
| JP2011252778A (en) | Method for detecting partial discharge of electrical device using magnetic field probe | |
| CN111108400B (en) | Method and device for detecting partial discharges in an electrical operating mechanism | |
| US11843236B2 (en) | Arc detection system and method for an aircraft high voltage and direct current electrical circuit | |
| KR0169969B1 (en) | Power apparatus, power transmission/distribution unit, and tripping method therefor | |
| US11726131B2 (en) | Method for detecting an electrical discharge in an electrical apparatus and system therefor | |
| JP4353840B2 (en) | Method for detecting partial discharge of electric circuit | |
| Achatz et al. | Features and benefits of UHF partial discharge monitoring systems for GIS | |
| JP2723902B2 (en) | Spectrum subtraction type partial discharge monitoring system | |
| US11977129B2 (en) | Arc fault detector utilizing a broadband spectrum | |
| JPH11223654A (en) | Partial discharge identifier | |
| JPH01232626A (en) | Abnormal current supply sensing device for gas-insulated switching apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22940319 Country of ref document: EP Kind code of ref document: A1 |