公开(公告)号：US09599653B2

公开(公告)日：2017-03-21

申请号：US14368677

申请日：2012-12-26

Applicant: HYOSUNG CORPORATION

Inventor： Sung-Wook Kim ,  Hwang-Dong Seo ,  Sung-Jik Kim

IPC: G01N7/14 ,  G01R31/02 ,  G01K13/00 ,  G01N33/00 ,  G01N33/28 ,  G01N33/20 ,  G01N1/22 ,  G01N33/24 ,  G01V9/00 ,  G01R31/12 ,  H01F27/12

CPC classification number: G01R31/027 ,  G01K13/00 ,  G01N1/2294 ,  G01N7/14 ,  G01N33/0004 ,  G01N33/203 ,  G01N33/24 ,  G01N33/2841 ,  G01R31/1281 ,  G01V9/007 ,  H01F27/12

Abstract: The present invention relates to a method for diagnosing an internal fault of an oil-immersed transformer by analyzing the composition ratio of dissolved gas in oil that is caused when an internal fault of the oil-immersed transformer occurs. According to the present invention, a method for diagnosing an internal fault of an oil-immersed tranformer by extracting and analyzing dissolved gas in oil from the oil-immersed transformer for which an internal fault is to be diagnosed comprises: a first step of calculating the composition ratio of each of CH4/H2, C2H2/C2H4, C2H4, C2H4/C2H6, and C2H4/CH4 from among the extracted dissolved gas in oil; a second step of determining whether the internal fault is an electrical fault or a thermal fault using the calculated composition ratios of CH4/H2 and C2H2/C2H4; and a third step of determining, if said internal fault is determined to be an electrical fault in the second step, whether the electrical fault is a partial discharge (PD), a discharge of low energy (D1), or a discharge of high energy (D2) using the calculated composition ratios of C2H2/C2H4 and C2H4/C2H6.

公开(公告)号：US20150204936A1

公开(公告)日：2015-07-23

申请号：US14371394

申请日：2012-02-21

Applicant: Toru Fukasawa ,  Takashi Ito ,  Hiroaki Miyashita

Inventor： Toru Fukasawa ,  Takashi Ito ,  Hiroaki Miyashita

IPC: G01R31/12 ,  G01R31/327

CPC classification number: G01R31/1254 ,  G01R31/1272 ,  G01R31/1281 ,  G01R31/14 ,  G01R31/327 ,  H01Q9/28 ,  H01Q9/285 ,  H02B13/065

Abstract: A partial discharge sensor is configured to have a metal casing 7 disposed outside flange 2a and 2b and a bowtie antenna 8 disposed inside the metal casing 7 in a direction orthogonal to a circumferential direction of the flanges 2a and 2b to thus receive a signal caused by a partial discharge over a wide band with high sensitivity.

Abstract translation: 局部放电传感器被配置为具有设置在凸缘2a和2b外侧的金属壳体7和设置在金属壳体7内的方向与法兰2a和2b的圆周方向正交的方向的弓形天线8，从而接收由 在宽频带上具有高灵敏度的局部放电。

公开(公告)号：US07842171B2

公开(公告)日：2010-11-30

申请号：US11693353

申请日：2007-03-29

Applicant: Michael Muhr ,  Werner Lick ,  Georg Johannes Pukel

Inventor： Michael Muhr ,  Werner Lick ,  Georg Johannes Pukel

IPC: G01N27/403 ,  G01N27/02

CPC classification number: G01R31/1281 ,  G01R31/027

Abstract: A testing arrangement for testing the dielectric strength of liquid insulating media has a test cell comprising an interior space for receiving the insulating medium to be tested and a first test electrode and a second test electrode for generating an electric field in a test volume of the test cell. The test cell is arranged in the interior of a receiving vessel which is filled with an auxiliary insulating medium or in the interior of an evacuated receiving vessel.

Abstract translation: 用于测试液体绝缘介质的介电强度的测试装置具有包括用于接收待测试的绝缘介质的内部空间的测试单元和用于在测试的测试体积中产生电场的第一测试电极和第二测试电极 细胞。 测试电池被布置在容纳容器的内部，其中填充有辅助绝缘介质或者在抽空的接收容器的内部。

公开(公告)号：US5804972A

公开(公告)日：1998-09-08

申请号：US587531

申请日：1996-01-17

Applicant: Nicholas de Kock ,  Ingo Herbst

Inventor： Nicholas de Kock ,  Ingo Herbst

IPC: G01R29/00 ,  G01R31/12 ,  H02B13/065 ,  G01N27/60

CPC classification number: G01R31/1281 ,  H02B13/0356 ,  H02B13/065

Abstract: A partial-discharge measuring device (3) which detects partial discharges in a gas-insulated, metal-enclosed, high-voltage system. The device includes an annular-gap antenna (6) arranged on the inner surface of the metal enclosure (1), a coaxial measuring cable (7) guided to a measuring instrument, and a tapering adaptor conductor (8) which connects the annular-gap antenna (6) and the coaxial measuring cable (7). The annular gap (9) of the antenna is determined by a plate-shaped electrode (10) which is inserted in an electrically insulated fashion into an opening (5), provided for a flanged attachment (4) in the metal enclosure (1). The adaptor conductor (8) includes an inner conductor, which supports the electrode (10), and is guided onto the shielded conductor (14) of the measuring cable (7), and an outer conductor which is guided onto the shield (15) of the measuring cable (7). The flanged attachment (4) tapers in the shape of a funnel between the opening (5) and the flange (16), and forms with its inner surface a first portion of the outer conductor. The partial-discharge measuring device (3) is of a simple and compact design and can be produced economically. In the UHF region, which is important for an accurate measurement of partial discharges, its transfer function exhibits at frequencies between 300 MHz and 1.8 GHz a portion which is high and flat. The measuring accuracy and sensitivity of the partial-discharge measuring device (3) are therefore particularly high in this frequency region.

Abstract translation: 一种局部放电测量装置（3），其在气体绝缘金属封闭的高压系统中检测部分放电。 该装置包括布置在金属外壳（1）的内表面上的环形间隙天线（6），引导到测量仪器的同轴测量电缆（7）和锥形接合导体（8） 间隙天线（6）和同轴测量电缆（7）。 天线的环形间隙（9）由以电绝缘方式插入到金属外壳（1）中用于凸缘附件（4）的开口（5）中的板状电极（10）确定， 。 适配器导体（8）包括支撑电极（10）并被引导到测量电缆（7）的屏蔽导体（14）的内部导体和被引导到屏蔽（15）上的外部导体， 的测量电缆（7）。 凸缘附件（4）在开口（5）和凸缘（16）之间以漏斗的形状逐渐变细，并且其内表面形成外部导体的第一部分。 局部放电测量装置（3）具有简单紧凑的设计，可经济地生产。 在对于部分放电的精确测量非常重要的UHF区域中，其传输函数在300MHz和1.8GHz之间的频率处表现出高且平坦的部分。 因此，在该频率区域中，局部放电测量装置（3）的测量精度和灵敏度特别高。

公开(公告)号：US20140347071A1

公开(公告)日：2014-11-27

申请号：US14355992

申请日：2012-11-14

Applicant: TECHIMP TECHNOLOGIES S.R.L.

Inventor： Gian Carlo Montanari ,  Matteo Fattori ,  Stefano Serra

IPC: G01R31/12 ,  G01N17/00

CPC classification number: G01R31/1281 ,  G01N17/00 ,  G01N17/02 ,  G01N33/28 ,  H01F27/402 ,  H01F2027/404

Abstract: A device (1) for assessing the corrosion of the transformer windings in an oil-insulated transformer comprising a copper conductor (2) immersed in the oil. The change of the resistance of the copper conductor (2) over time is measured, e.g. using a Wheatstone bridge (2, 12a, 12b, 12c), and used to assess the degradation of the copper exposed to the insulation oil. The temperature of the copper conductor can be controlled by an heating element and a temperature sensor.

Abstract translation: 一种用于评估在油绝缘变压器中的变压器绕组的腐蚀的装置（1），其包括浸入油中的铜导体（2）。 测量铜导体（2）随时间的电阻的变化，例如， 使用惠斯通电桥（2,12a，12b，12c），并用于评估暴露于绝缘油的铜的降解。 铜导体的温度可以通过加热元件和温度传感器来控制。

公开(公告)号：US20140340096A1

公开(公告)日：2014-11-20

申请号：US14345397

申请日：2012-09-17

Applicant: Olaf Rudolph

Inventor： Olaf Rudolph

IPC: G01R31/12 ,  G01R31/08

CPC classification number: G01R31/1272 ,  G01R31/08 ,  G01R31/1254 ,  G01R31/1281

Abstract: A method for identifying one or more simultaneously occurring partial discharge sources from partial discharge measurement signals of an electrical device to which an AC voltage is applied. A method according to the invention for identifying one or more simultaneously occurring partial discharge sources from partial discharge measurement signals of an electrical device to which an AC voltage is applied, in particular a gas-insulated system, a high-voltage generator, a transformer, an electrical high-voltage power line or an electrical cable, comprises the following steps: on the basis of a frequency matrix into which measured partial discharge pulses are entered as partial discharge pulse matrix arrays according to the detected pulse amplitude and to the detected phase position and in which partial discharge pulse matrix arrays are allocated to at least one enclosed area of partial discharge pulse matrix arrays, determining area parameters of the at least one enclosed area of partial discharge pulse matrix arrays; comparing, for each enclosed area of partial discharge pulse matrix arrays, area parameters of the enclosed area of partial discharge pulse matrix arrays to predetermined rule sets, with each rule set corresponding to a characteristic partial discharge pulse area basic form; and allocating, for each enclosed area of partial discharge pulse matrix arrays, that rule set to the enclosed area which best corresponds to the enclosed area, such that one partial discharge pulse area basic form is allocated to each enclosed area of partial discharge pulse matrix arrays; applying predetermined fault rules, which allocate characteristic partial discharge pulse area basic forms and characteristic combinations of partial discharge pulse area basic forms to known partial discharge sources, to the ascertained partial discharge pulse area basic forms in order to determine those partial discharge sources which have rendered the corresponding partial discharge pulses.

公开(公告)号：US20120290229A1

公开(公告)日：2012-11-15

申请号：US13519528

申请日：2011-01-10

Applicant: Andrea Cavallini ,  Fabio Ciani ,  Stefano Serra ,  Gian Carlo Montanari

Inventor： Andrea Cavallini ,  Fabio Ciani ,  Stefano Serra ,  Gian Carlo Montanari

IPC: G01R31/12 ,  G06F19/00

CPC classification number: G01R31/1281 ,  G01N33/2841 ,  G01R31/14

Abstract: A diagnostic method and apparatus for assessing the insulation condition of electrical equipment (3) insulated with oil (2). The method comprises the following steps: measuring the concentration of at least one gas dissolved in the insulating oil (2) of the electrical equipment (3); deriving at least one concentration parameter correlated with the gas concentration measured in a predetermined acquisition time interval; measuring electrical pulses relating to partial electrical discharges which occur in the electrical equipment (3) and which generate said pulses; deriving at least one discharge parameter correlated with the partial discharges measured substantially concurrently with the predetermined acquisition time interval; deriving a diagnostic indication about the insulation condition of the electrical equipment (3) as a function of the derived values of the concentration and discharge parameters.

Abstract translation: 用于评估用油（2）绝缘的电气设备（3）的绝缘条件的诊断方法和装置。 该方法包括以下步骤：测量溶解在电气设备（3）的绝缘油（2）中的至少一种气体的浓度; 导出与在预定采集时间间隔中测量的气体浓度相关的至少一个浓度参数; 测量与电气设备（3）中发生的并且产生所述脉冲的部分放电有关的电脉冲; 得出与预定采集时间间隔基本同时测量的部分放电相关的至少一个放电参数; 根据浓度和排出参数的导出值，得出关于电气设备（3）的绝缘状况的诊断指示。

公开(公告)号：US06545480B1

公开(公告)日：2003-04-08

申请号：US09600560

申请日：2000-07-19

Applicant: Igor Viktorovich Zhuravkov

Inventor： Igor Viktorovich Zhuravkov

IPC: G01R2912

CPC classification number: G01R31/1281 ,  G01N27/92 ,  H05H1/48 ,  H05H2001/483

Abstract: The invention pertains to testing technique and designed to be used in the research n the dielectric rigidity of high-voltage equipment gaseous isolation. The technical result of the invention is the achievement of gas dielectric breakdown with relatively low voltage. A corona discharge is generated by supplying the initial voltage to the electrodes, defining the discharge gap so as to ensure a three dimensional load at the corona-producing electrode. Then, the total voltage, sufficient for complete breakdown, is supplied to the discharge gap with the uniformly distributed three-dimensional load and the breakdown of a gaseous dielectric takes place. The present method provides the decrease of corona discharge and formation of impulse pedestal with the help of additional dynamic discharger in the circuit, which electrodes are switched from the closed state to the open one.

Abstract translation: 本发明涉及测试技术，设计用于研究高压设备气体隔离的介电刚度。 本发明的技术结果是实现具有较低电压的气体绝缘击穿。 通过向电极提供初始电压来产生电晕放电，限定放电间隙，以确保电晕产生电极处的三维负载。 然后，足够的完全击穿的总电压以均匀分布的三维负载供给到放电间隙，并且发生气体电介质的击穿。 本方法通过电路中的额外的动态放电器来提供电晕放电的减少和脉冲基座的形成，这些电极从闭合状态切换到开路状态。

公开(公告)号：US3559049A

公开(公告)日：1971-01-26

申请号：US3559049D

申请日：1968-07-02

Applicant: LEONARD N LIEBERMANN ,  STANLEY H LAI

Inventor： LIEBERMANN LEONARD N ,  LAI STANLEY H

IPC: G01R31/12 ,  G01N27/62

CPC classification number: G01R31/1281

Abstract: A LOW INTENSITY SPARK DISCHARGE IS PERIODICALLY IGNITED AND EXTINGUISHED IN A GIVEN ATMOSPHERE BY APPLYING VOLTAGE PULSES ACROSS ONE OR MORE PAIRS OF ELECTRODES DISPOSED IN THE GIVEN ATMOSPHERE, WHICH PULSES HAVE AMPLITUDES SUFFICIENT TO CAUSE A LOW INTENSITY SPARK DISCHARGE TO OCCUR ACROSS ONE OF THE PAIRS OF ELECTRODES IN THE PRESENCE OF SUBSTANTIALLY ALL CONCENTRATIONS IN THE GIVEN ATMOSPHERE OF GASEOUS IMPURITIES TO BE DETECTED. A DETECTOR DETECTS CHANGES IN THE MAXIMUM ELECTRODE VOLTAGE OCCURING DURING THE LOW INTENSITY SPARK DISCHARGES FROM THE MAXIMUM ELECTRODE VOLTAGE IN THE ABSENCE OF GASEOUS IMPURITIES, WHICH CHANGES CORRESPOND TO THE PRESENCE OF GASEOUS IMPURITIES IN THE GIVEN ATMOSPHERE. IN ONE PREFERRED EMBODIMENT OF THE INVENTION, THE DETECTOR INCLUDES A VOLTAGESENSITIVE SWITCH ACTUABLE BY A CHANGE OF MORE THAN A PREDETERMINED MAGNITUDE IN THE MAXIMUM ELECTRODE VOLTAGE FROM ITS VALUE IN THE ABSENCE OF GASEOUS IMPURITIES. IN ANOTHER EMBODIMENT, THE DETECTOR INCLUDES A PEAK-READING VOLTMETER, ENABLING THE IMPURITY CONCENTRATION TO BE READ DIRECTLY. IN A FURTHER EMBODIMENT OF THE INVENTION, CHANGES IN THE MAXIMUM ELECTRODE VOLTAGE ARE CONVERTED INTO VARIATIONS IN THE FREQUENCY OF THE VOLTAGE PULSES APPLIED TO THE ELECTRODES, WHICH FREQUENCY VARIATIONS ARE USED TO INDICATE THE PRESENCE OF IMPURITIES. IN A FURTHER ENBODIMENT, TWO PAIRS OF ELECTRODES ARE PROVIDED AND A CHANGE IN THE MAXIMUM ELECTRODE VOLTAGE IS DETECTED BY THE TRANSFER OF THE DISCHARGE FROM ONE ELECTRODE PAIR TO THE OTHER.

公开(公告)号：US20070227880A1

公开(公告)日：2007-10-04

申请号：US11693353

申请日：2007-03-29

Applicant: Michael Muhr ,  Werner Lick ,  Georg Johannes Pukel

Inventor： Michael Muhr ,  Werner Lick ,  Georg Johannes Pukel

IPC: C25B9/00

CPC classification number: G01R31/1281 ,  G01R31/027

Abstract: A testing arrangement for testing the dielectric strength of liquid insulating media has a test cell comprising an interior space for receiving the insulating medium to be tested and a first test electrode and a second test electrode for generating an electric field in a test volume of the test cell. The test cell is arranged in the interior of a receiving vessel which is filled with an auxiliary insulating medium or in the interior of an evacuated receiving vessel.

Abstract translation: 用于测试液体绝缘介质的介电强度的测试装置具有包括用于接收待测试的绝缘介质的内部空间的测试单元和用于在测试的测试体积中产生电场的第一测试电极和第二测试电极 细胞。 测试电池被布置在容纳容器的内部，其中填充有辅助绝缘介质或者在抽空的接收容器的内部。