KR100499907B1 - Partial Discharge Sensor for End Winding Installation in Global Vacuum Pressure Impregnation Processed Rotating Machine - Google Patents
Partial Discharge Sensor for End Winding Installation in Global Vacuum Pressure Impregnation Processed Rotating Machine Download PDFInfo
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- KR100499907B1 KR100499907B1 KR10-2003-0010659A KR20030010659A KR100499907B1 KR 100499907 B1 KR100499907 B1 KR 100499907B1 KR 20030010659 A KR20030010659 A KR 20030010659A KR 100499907 B1 KR100499907 B1 KR 100499907B1
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- partial discharge
- rotor
- winding terminal
- discharge signal
- insulated
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- 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
- G01R31/1227—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 of components, parts or materials
- G01R31/1263—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- 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
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
Abstract
본 발명은 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서에 관한 것으로, 함침 절연 고압 회전기의 권선 단말에 설치가능하도록 'ㄷ'자 형상으로 형성한 절연박판과; 상기 절연박판의 'ㄷ'자 형상면의 중심부위를 따라 설치되되, 동축케이블의 리드선과 접속되어 해당 고압 회전기의 권선에서 발생하는 부분방전 신호를 부분방전 측정장치로 출력하도록 하는 부분방전 신호선을 포함하도록 구성함으로써 함침 절연 고압 회전기의 권선 단말에 설치 가능하여 설치작업 및 동축케이블의 차폐선 접지가 용이하고, 고정자 권선에서 발생한 부분방전 신호만을 선택적으로 측정할 수 있으며, 기계적 충격과 열적 변형에 내성을 가지도록 한 것이다. The present invention relates to a partial discharge measurement sensor during operation that can be installed in the winding terminal of the impregnated insulated high pressure rotor, and the insulating thin plate formed in a 'c' shape to be installed in the winding terminal of the impregnated insulated high pressure rotor; Is installed along the center of the 'c' shaped surface of the insulating thin plate, and connected to the lead wire of the coaxial cable includes a partial discharge signal line for outputting a partial discharge signal generated in the winding of the high-voltage rotor to the partial discharge measuring device It can be installed in the winding terminal of impregnated insulation high voltage rotor to facilitate the installation work and the grounding of the shielded wire of the coaxial cable, and to measure only the partial discharge signal generated in the stator winding, and to be resistant to mechanical shock and thermal deformation. It was to have.
Description
본 발명은 발전기나 전동기 등과 같은 회전기의 비파괴 검사 장치에 관련되며, 특히, 함침(Vacuum Pressure Impregnation) 절연 공정에 의해 처리된 고압 회전기의 부분방전 상태를 측정하여 절연 성능을 검증하는 부분방전 측정센서에 관한 것이다.The present invention relates to a non-destructive testing device of a rotor such as a generator or an electric motor, and more particularly, to a partial discharge measuring sensor for verifying insulation performance by measuring a partial discharge state of a high-pressure rotor processed by a vacuum pressure impregnation insulation process. It is about.
고압 회전기의 경우 고정자와 회전자 제조시에 함침 절연 공정을 통해 바니쉬 용액 등의 절연재에 코일을 함침시켜 절연처리한다. 생산된 고압 회전기는 출고전에 절연처리된 코일의 절연 성능의 시험이 요구된다. 절연 성능의 시험은 고전압에 의한 절연파괴 시험보다는 비파괴 시험인 부분 방전을 측정하는 방식이 선호되고 있다.In the case of the high-pressure rotor, during the manufacturing of the stator and the rotor, the coil is impregnated with an insulating material such as a varnish solution through an impregnation insulation process to insulate. The high pressure rotor produced is required to be tested for insulation performance of coils insulated before shipment. As for the test of insulation performance, the method of measuring partial discharge, which is a non-destructive test, is preferred to the test of insulation breakdown by high voltage.
도 1 은 종래의 함침 절연 고압 회전기의 부분방전 측정센서의 예시도이다.1 is an exemplary view of a partial discharge measurement sensor of a conventional impregnation insulated high pressure rotor.
도면에 도시한 바와같이, 종래의 함침 절연 고압 회전기의 부분방전 측정센서(40a)는 고정자 철심(10)에 형성한 고정자 슬롯(11)에 삽입되어 설치되는 상, 하부 권선(20a,20b)과 회전자(도면 도시 생략) 사이의 공극 하부에 위치하는 웨지(30) 상부에 박막 형태로 설치되어, 운전중 전압에 의한 권선(20a,20b)의 열화에 따라 함침 절연된 권선의 절연층에 미소공극, 균열, 박리 등의 결함이 생기게 되어 발생하는 부분방전에 의한 펄스전류를 측정함으로써 고압 회전기의 고정자 권선에서 발생되는 부분방전을 측정하였다.As shown in the figure, the partial discharge measurement sensor 40a of the conventional impregnation insulated high-voltage rotor is provided with the upper and lower windings 20a and 20b inserted into and installed in the stator slots 11 formed in the stator core 10. It is installed in the form of a thin film on the top of the wedge 30 located below the gap between the rotors (not shown in the drawing), and is minutely applied to the insulating layer of the windings impregnated and insulated according to the deterioration of the windings 20a and 20b due to voltage during operation. The partial discharge generated in the stator winding of the high-voltage rotor was measured by measuring the pulse current caused by partial discharge caused by defects such as voids, cracks, and peeling.
그러나, 회전기의 고정자 철심(10)과 회전자(도면 도시 생략) 사이의 공극은 보통 2∼3 mm 의 매우 좁은 공간이므로, 부분방전 측정센서(40a) 설치시 작업공간이 협소하여 불편할 뿐만 아니라 동축 케이블의 차폐선 접지가 어려우며, 부분방전 측정시 부분방전 측정센서(40a)가 고속회전하는 회전자에 접촉될 우려도 있었다.However, since the air gap between the stator core 10 of the rotor and the rotor (not shown in the drawing) is usually a very narrow space of 2 to 3 mm, the work space is narrow when the partial discharge measurement sensor 40a is installed, and it is inconvenient as well. It was difficult to ground the shield wire of the cable, and there was a fear that the partial discharge measuring sensor 40a would come into contact with the rotor rotating at high speed during the partial discharge measurement.
따라서, 본 발명자는 함침 절연 고압 회전기의 권선 단말의 반도전층에 설치가 가능하여 부분방전 측정센서 설치작업 및 동축케이블의 차폐선 접지가 용이하며, 센서가 설치되는 고정자 권선에서 발생한 부분방전 신호만을 선택적으로 측정할 수 있는 새로운 구조의 고압 회전기용 부분방전 측정센서에 대한 연구를 하게 되었다.Therefore, the present inventors can be installed in the semi-conductive layer of the winding terminal of the impregnation insulated high-voltage rotor, so it is easy to install the partial discharge measurement sensor and ground the shield wire of the coaxial cable, and select only the partial discharge signal generated from the stator winding in which the sensor is installed. The study of the partial discharge measuring sensor for the high-pressure rotor of the new structure that can be measured with
본 발명은 상기한 문제점을 해결하기 위한 것으로, 함침 절연 고압 회전기의 권선 단말에 설치 가능하여 설치작업이 용이한 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서를 제공함을 그 목적으로 한다.The present invention is to solve the above problems, to provide a partial discharge measuring sensor during operation that can be installed in the winding terminal of the impregnation insulated high-pressure rotor can be installed in the winding terminal of the impregnation insulated high-voltage rotor easy to install. do.
본 발명의 다른 목적은 동축케이블의 차폐선 접지가 용이한 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서를 제공하는 것이다.Another object of the present invention is to provide a partial discharge measurement sensor during operation that can be installed in the winding terminal of the impregnated insulation high voltage rotor, which is easy to ground the shield wire of the coaxial cable.
본 발명의 또 다른 목적은 센서가 설치되는 고정자 권선에서 발생한 부분방전 신호만을 선택적으로 측정할 수 있는 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서를 제공하는 것이다.Still another object of the present invention is to provide a partial discharge measuring sensor during operation that can be installed in the winding terminal of the impregnated insulation high voltage rotor capable of selectively measuring only the partial discharge signal generated in the stator winding in which the sensor is installed.
본 발명의 또 다른 목적은 기계적 충격과 열적 변형에 강한 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서를 제공하는 것이다. It is still another object of the present invention to provide a partial discharge measuring sensor during operation that can be installed in a winding terminal of an impregnation insulated high pressure rotor that is resistant to mechanical shock and thermal deformation.
상기한 목적을 달성하기 위한 본 발명의 일 양상에 따르면, 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서는 함침 절연 고압 회전기의 권선 단말에 설치가능하도록 'ㄷ'자 형상으로 형성한 절연박판과; 상기 절연박판의 'ㄷ'자 형상면의 중심부위를 따라 설치되되, 동축케이블의 리드선과 접속되어 해당 고압 회전기의 권선에서 발생하는 부분방전 신호를 부분방전 측정장치로 출력하도록 하는 부분방전 신호선을 포함하는 것을 특징으로 한다.According to an aspect of the present invention for achieving the above object, the partial discharge measuring sensor during operation that can be installed in the winding terminal of the impregnation insulated high-voltage rotor according to the present invention to be installed in the winding terminal of the impregnation insulated high-voltage rotor An insulating thin plate formed in a shape of a child; Is installed along the center of the 'c' shaped surface of the insulating thin plate, and connected to the lead wire of the coaxial cable includes a partial discharge signal line for outputting a partial discharge signal generated in the winding of the high-voltage rotor to the partial discharge measuring device Characterized in that.
따라서, 이와같은 양상에 따라 함침 절연 고압 회전기의 부분방전 측정시 부분방전 측정센서를 함침 절연 고압 회전기의 권선 단말에 설치가 가능하여 설치작업이 용이한 장점을 가진다.Therefore, according to this aspect, it is possible to install the partial discharge measurement sensor in the winding terminal of the impregnation insulated high pressure rotor during the partial discharge measurement of the impregnated insulated high pressure rotor.
본 발명의 부가적인 양상에 따르면, 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서는 상기 부분방전 신호선이 설치된 절연박판의 배면에 형성되되, 상기 부분방전 신호선과 전기적으로 절연되고, 함침 절연 고압 회전기의 권선 단말의 반도전층에 접촉되는 접지용 동박판과; 상기 부분방전 신호선과 전기적으로 절연되고, 상기 접지용 동박판과 전기적으로 연결되어 상기 함침 절연 고압 회전기의 권선 단말의 반도전층에 접지되는 동축케이블 차폐선을 더 포함하는 것을 특징으로 한다.According to an additional aspect of the present invention, the partial discharge measurement sensor during operation that can be installed in the winding terminal of the impregnated insulated high-voltage rotor according to the present invention is formed on the rear surface of the insulating thin plate provided with the partial discharge signal line, the partial discharge signal line and the electrical A copper foil plate for insulating and contacting the semiconducting layer of the winding terminal of the impregnating insulation high voltage rotor; And a coaxial cable shielding wire electrically insulated from the partial discharge signal line, electrically connected to the ground copper plate, and grounded to a semiconducting layer of a winding terminal of the impregnating insulation high voltage rotor.
따라서, 이와같은 양상에 따라 함침 절연 고압 회전기의 부분방전 측정시 부분방전 측정센서를 함침 절연 고압 회전기의 권선 단말의 반도전층에 설치가 가능하여 설치작업이 용이한 동시에 차폐선 접지가 용이한 장점을 가진다. Therefore, according to this aspect, the partial discharge measurement sensor can be installed in the semiconducting layer of the winding terminal of the impregnated insulated high pressure rotor when the partial discharge measurement of the impregnated insulated high pressure rotor is easy, and the shielding wire is easily grounded. Have
본 발명의 부가적인 양상에 따르면, 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서는 상기 부분방전 신호선과 전기적으로 절연되고 상기 동축케이블 차폐선과 전기적으로 연결되되, 상기 절연박판의 'ㄷ'자 형상면을 따라 상기 부분방전 신호선의 양측으로 설치되어 센싱감도에 영향을 주는 외부의 전자기파를 차단하는 차폐막을 더 포함하는 것을 특징으로 한다.According to an additional aspect of the present invention, the partial discharge measurement sensor during operation that can be installed in the winding terminal of the impregnation insulated high voltage rotor according to the present invention is electrically insulated from the partial discharge signal line and electrically connected to the coaxial cable shielding line, It is characterized in that it further comprises a shielding film installed on both sides of the partial discharge signal line along the 'c' shaped surface of the insulating thin film to block external electromagnetic waves affecting the sensing sensitivity.
따라서, 이와같은 양상에 따라 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서는 센서가 설치되는 고정자 권선에서 발생한 부분방전 신호만을 선택적으로 측정할 수 있는 장점을 가진다.Therefore, according to this aspect, the partial discharge measurement sensor during operation that can be installed in the winding terminal of the impregnation insulated high voltage rotor according to the present invention has the advantage of selectively measuring only the partial discharge signal generated in the stator winding in which the sensor is installed.
본 발명의 부가적인 양상에 따르면, 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서는 절연박판의 재질이 에폭시이고, 상기 부분방전 측정센서가 함침 절연 고압 회전기의 권선 단말의 반도전층에 에폭시 접착제에 의해 접착되어 설치되는 것을 특징으로 한다.According to an additional aspect of the present invention, the partial discharge measurement sensor during operation that can be installed in the winding terminal of the impregnation insulated high pressure rotor according to the present invention is a material of the insulating thin plate is epoxy, the partial discharge measurement sensor is a winding of the impregnation insulated high pressure rotor The semiconductive layer of the terminal is characterized in that the adhesive is installed by the adhesive.
따라서, 이와같은 양상에 따라 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서의 절연박판 재질과 이를 권선단말에 접착시키는 접착제의 재질이 동일하여 기계적 충격과 열적 변형에 강한 장점을 가진다.Therefore, according to this aspect, the insulating sheet material of the partial discharge measuring sensor during operation that can be installed in the winding terminal of the impregnating insulation high voltage rotor according to the present invention and the adhesive material that bonds it to the winding terminal are the same, so that the mechanical shock and thermal deformation Has a strong advantage.
이하, 첨부된 도면을 참조하여 기술되는 본 발명의 바람직한 실시예를 통해 본 발명을 당업자가 용이하게 이해하고 재현할 수 있도록 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.
도 2 는 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서의 일실시예의 구조도, 도 3 은 도 2 에서 도시한 부분방전 측정센서를 펼친상태를 도시한 도면이다.Figure 2 is a structural diagram of an embodiment of the partial discharge measurement sensor during operation that can be installed in the winding terminal of the impregnation insulated high-voltage rotor according to the present invention, Figure 3 is a view showing a state in which the partial discharge measurement sensor shown in FIG. .
도면에 도시한 바와같이, 이 실시예에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서(40b)는 절연박판(41b)과, 부분방전 신호선(42b)과, 접지용 동박판(43b)과, 동축케이블 차폐선(44b)과, 차폐막(45b)을 포함한다.As shown in the drawing, the partial discharge measurement sensor 40b during operation that can be installed in the winding terminal of the impregnated insulated high voltage rotor according to this embodiment includes an insulating thin plate 41b, a partial discharge signal line 42b, and a ground copper. The thin plate 43b, the coaxial cable shielding line 44b, and the shielding film 45b are included.
상기 절연박판(41b)은 함침 절연 고압 회전기의 권선 단말(21)에 설치가능하도록 'ㄷ'자 형상으로 이루어져 슬라이드 방식으로 상기 권선 단말(21)에 설치된다. 이 절연박판(41b)은 에폭시 등의 절연성 재질로 1mm 정도의 두께를 가진다.The insulating thin plate 41b is formed in a 'c' shape so as to be installed on the winding terminal 21 of the impregnating insulation high voltage rotor, and is installed on the winding terminal 21 in a slide manner. The insulating thin plate 41b is made of an insulating material such as epoxy and has a thickness of about 1 mm.
상기 부분방전 신호선(42b)은 상기 절연박판(41b)의 'ㄷ'자 형상면의 중심부위를 따라 설치되되, 동축케이블(도면 도시 생략)의 리드선과 접속되어 해당 고압 회전기의 권선에서 발생하는 부분방전 신호를 부분방전 측정장치(도면 도시 생략)로 출력하도록 한다. 이 부분방전 신호선(42b)은 도면상에서는 간단하게 직선으로 표시하였으나, 상기 에폭시 등의 절연성 재질로 된 절연박판(41b)에 0.1mm 정도 직경을 가진 코일형태로 배치된 것으로, 부분방전 측정시 동축케이블의 리드선과 연결되어 권선에서 발생한 부분방전에 의해 유도되는 전류를 부분방전 측정장치(도면 도시 생략)로 출력한다.상기 부분방전 측정장치는 본 발명에 따른 부분방전 측정센서로부터 인출된 리드선을 접속함에 의해 상기 부분방전 측정센서에 의해 검출되는 신호를 수신하고, 이 검출 신호를 분석함에 의해 고압 회전기의 권선에서 발생하는 부분방전을 측정하는 장치로, 측정자가 휴대하고 다니는 휴대용 부분방전 측정장치나, 부분방전 측정센서와 원격으로 연결되는 컴퓨터 단말장치 등을 포함한다.The partial discharge signal line 42b is installed along the center of the 'c' shaped surface of the insulating thin plate 41b, and is connected to a lead wire of a coaxial cable (not shown in the drawing) to be generated in the winding of the high-voltage rotor. The discharge signal is output to the partial discharge measuring device (not shown). Although the partial discharge signal line 42b is simply shown in a straight line on the drawing, the partial discharge signal line 42b is disposed in the form of a coil having a diameter of about 0.1 mm on the insulating thin plate 41b made of an insulating material such as epoxy. Connected to the lead wire of the output current induced by the partial discharge generated in the winding to the partial discharge measuring device (not shown). The partial discharge measuring device is connected to the lead wire drawn from the partial discharge measuring sensor according to the present invention. A device for measuring a partial discharge generated in a winding of a high-voltage rotor by receiving a signal detected by the partial discharge measuring sensor by analyzing the detected signal, and a portable partial discharge measuring device carried by a measurer or a part Computer terminal device and the like connected remotely with the discharge measuring sensor.
따라서, 도 4 에 도시한 바와 같이 상기 부분방전 신호선(42b)이 형성된 'ㄷ'자 형상의 절연박판(41b)을 함침 절연 고압 회전기의 권선 단말(21)에 설치하고, 상기 부분방전 신호선(42b)에 동축케이블(도면 도시 생략)을 연결하여 부분방전 측정장치(도면 도시 생략)를 통해 함침 절연 고압 회전기의 권선 단말(21)에서 발생하는 부분방전을 검출할 수 있게 되어, 종래의 회전자(도면 도시 생략)와 고정자 철심(10)에 형성된 고정자 슬롯(11)에 삽입되는 권선(20a,20b) 사이의 협소한 공극에 위치하는 웨지(30) 상부에 설치되는 부분방전 측정센서에 비해 설치작업이 용이하다.Therefore, as shown in FIG. 4, the '-' shaped insulating plate 41b having the partial discharge signal line 42b is provided on the winding terminal 21 of the impregnated insulation high voltage rotor, and the partial discharge signal line 42b. By connecting the coaxial cable (not shown) to the partial discharge measuring device (not shown) it is possible to detect the partial discharge generated in the winding terminal 21 of the impregnated insulation high-voltage rotor, the conventional rotor ( (Not shown in the drawing) and the installation work compared to the partial discharge measurement sensor installed on the wedge 30 located in the narrow gap between the windings 20a and 20b inserted into the stator slot 11 formed in the stator iron core 10. This is easy.
상기 접지용 동박판(43b)은 상기 부분방전 신호선(42b)이 설치된 절연박판(41b)의 배면에 형성되되, 상기 부분방전 신호선(42b)과 전기적으로 절연되고, 함침 절연 고압 회전기의 권선 단말(21)의 반도전층(23)에 접촉된다. 이 접지용 동박판(43b)은 약 0.1 mm 정도 두께로 절연박판(41b)의 배면에 3mm 정도의 폭으로 부착되어 부분방전 측정센서(40a) 설치시 함침 절연 고압 회전기의 권선 단말(21)의 반도전층(23)과 접촉되게 된다.The ground copper plate 43b is formed on the rear surface of the insulating thin plate 41b provided with the partial discharge signal line 42b, and is electrically insulated from the partial discharge signal line 42b, and is wound around the winding terminal of the impregnated insulation high voltage rotor ( 21 is in contact with the semiconducting layer 23. The ground copper plate 43b is about 0.1 mm thick and is attached to the back surface of the insulating thin plate 41b with a width of about 3 mm, so that when the partial discharge measuring sensor 40a is installed, the winding terminal 21 of the impregnated insulated high voltage rotor is installed. It comes into contact with the semiconducting layer 23.
상기 동축케이블 차폐선(44b)은 상기 부분방전 신호선(42b)과 전기적으로 절연되고, 상기 접지용 동박판(43b)과 전기적으로 연결되어 상기 함침 절연 고압 회전기의 권선 단말(21)의 반도전층(23)에 접지된다. 즉, 이 동축케이블 차폐선(44b)은 동축케이블(도면 도시 생략)의 접지용 리드선 등의 외부와 접지되어 상기 부분방전 신호선(42b)에 유도되는 전압을 접지 전위 근방으로 떨어뜨린다. The coaxial cable shielding line 44b is electrically insulated from the partial discharge signal line 42b and is electrically connected to the ground copper plate 43b so as to have a semiconducting layer of the winding terminal 21 of the impregnating insulation high voltage rotor ( 23) is grounded. In other words, the coaxial cable shielding line 44b is grounded to the outside such as a grounding lead wire of the coaxial cable (not shown) to drop the voltage induced in the partial discharge signal line 42b near the ground potential.
즉, 함침 절연 고압 회전기의 권선 단말(21)은 제작시 함침 절연과정을 통해 처리되며, 이 함침 절연처리에 의해 절연층(22)과, 반도전층(23)이 형성되게 된다. 상기 반도전층(23)은 상기 절연층(22)의 평활하지 않은 표면에 의해 발생하는 코로나 방전을 방지하기 위한 것으로, 권선(20b)에 발생하는 전계의 불균형 발생을 최소화한다.That is, the winding terminal 21 of the impregnation insulation high voltage rotor is processed through an impregnation insulation process during manufacture, and the insulation layer 22 and the semiconductive layer 23 are formed by this impregnation insulation process. The semiconducting layer 23 is to prevent corona discharge generated by the unsmooth surface of the insulating layer 22, and minimizes the occurrence of an unbalance of the electric field generated in the winding 20b.
따라서, 부분방전 측정센서(40b) 설치시 도 4 에 도시한 바와같이 상기 절연박판(41b)의 배면에 형성된 접지용 동박판(43b)이 상기 함침 절연 고압 회전기의 권선 단말(21)의 반도전층(23)에 접촉되도록 간편하게 설치할 수 있고, 이 때, 상기 동축케이블 차폐선(44b)이 상기 접지용 동박판(43b)과 연결되어 있으므로, 결국 상기 동축케이블 차폐선(44b)은 함침 절연 고압 회전기의 권선 단말(21)의 반도전층(23)에 용이하게 접지되게 되며, 함침 절연 고압 회전기의 권선 단말(21)에서 발생하는 부분방전 측정시 이 동축케이블 차폐선(44b)과 동축케이블(도면 도시 생략)의 접지용 리드선을 그라운드에 접지시키고, 상기 부분방전 신호선(42b)을 동축케이블(도면 도시 생략)의 리드선에 연결하여 부분방전 측정장치(도면 도시 생략)를 통해 부분방전을 검출하게 된다. Therefore, when the partial discharge measuring sensor 40b is installed, the ground copper plate 43b formed on the rear surface of the insulating thin plate 41b is semi-conducting layer of the winding terminal 21 of the impregnating insulation high voltage rotor. The coaxial cable shielding wire 44b is impregnated insulated high voltage rotor because the coaxial cable shielding wire 44b is connected to the ground copper plate 43b. It is easily grounded to the semi-conductive layer 23 of the winding terminal 21 of the coaxial cable shielding wire 44b and the coaxial cable during partial discharge measurement occurring in the winding terminal 21 of the impregnating insulation high voltage rotor (shown in the drawing). The grounding lead wire (not shown) is grounded to ground, and the partial discharge signal line 42b is connected to the lead wire of the coaxial cable (not shown) to detect the partial discharge through the partial discharge measuring device (not shown).
상기 차폐막(45b)은 상기 부분방전 신호선(42b)과 전기적으로 절연되고 상기 동축케이블 차폐선(44b)과 전기적으로 연결되되, 상기 절연박판(41b)의 'ㄷ'자 형상면을 따라 상기 부분방전 신호선의 양측으로 설치되어 센싱감도에 영향을 주는 외부의 전자기파를 차단한다.The shielding film 45b is electrically insulated from the partial discharge signal line 42b and electrically connected to the coaxial cable shielding line 44b, and the partial discharge is formed along the 'c' shaped surface of the insulating thin plate 41b. It is installed on both sides of the signal line to block external electromagnetic waves that affect the sensing sensitivity.
즉, 함침 절연 고압 회전기의 고정자 철심(10)상에는 다수의 고정자 슬롯(11)이 형성되며, 근접한 두 슬롯(11)쌍에는 한쌍의 상,하부 권선(20a,20b)이 삽입되게 되고, 그 권선 단말(21)들은 각각 전선케이블의 리드선에 연결되게 된다. 따라서, 각 권선(20a,20b)에는 각각 부분방전이 발생하게 되고, 소정의 권선에 대한 부분방전 측정시 타 권선에서 발생되는 부분방전 신호들이 영향을 미치게 된다.That is, a plurality of stator slots 11 are formed on the stator iron core 10 of the impregnated insulation high-voltage rotor, and a pair of upper and lower windings 20a and 20b are inserted into two adjacent slots 11 pairs. Terminals 21 are each connected to the lead wire of the wire cable. Accordingly, partial discharge occurs in each of the windings 20a and 20b, and partial discharge signals generated in other windings affect the measurement of the partial discharge of a predetermined winding.
그러나, 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서는 상기 차폐막(45b)을 통해 센싱감도에 영향을 주는 외부의 전자기파를 차단할 수 있어 센서가 설치되는 고정자 권선에서 발생한 부분방전 신호만을 선택적으로 측정할 수 있게 된다.However, the partial discharge measurement sensor during operation that can be installed in the winding terminal of the impregnation insulated high-voltage rotor according to the present invention can block external electromagnetic waves affecting the sensing sensitivity through the shielding film 45b in the stator winding in which the sensor is installed. Only the generated partial discharge signal can be measured selectively.
한편, 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서(40b)는 절연박판(41b)의 재질이 에폭시이고, 상기 부분방전 측정센서(40b)가 함침 절연 고압 회전기의 권선 단말(21)의 반도전층(23)에 에폭시 접착제에 의해 접착되어 설치되도록 함으로써 부분방전 측정센서(40b)의 절연박판(41b) 재질과 이를 권선 단말(21)에 접착시키는 접착제의 재질이 동일하여 기계적 충격과 열적 변형에 강하도록 설치하는 것이 바람직하다.On the other hand, the partial discharge measurement sensor 40b during operation that can be installed in the winding terminal of the impregnation insulated high pressure rotor according to the present invention is made of an insulating thin film 41b of epoxy, and the partial discharge measurement sensor 40b is impregnated insulated high pressure rotor. The insulating plate 41b material of the partial discharge measuring sensor 40b and the adhesive for bonding it to the winding terminal 21 are formed by being adhered to the semiconductive layer 23 of the winding terminal 21 by an epoxy adhesive. It is preferable to install the same to resist mechanical shock and thermal deformation.
따라서, 위와같이 함에 의해 상기에서 제시한 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서의 목적을 달성하게 된다.Thus, by doing as described above to achieve the object of the partial discharge measurement sensor during operation that can be installed in the winding terminal of the impregnated insulation high-voltage rotor according to the present invention.
이상에서 상세히 설명한 바와 같이 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서는 함침 절연 고압 회전기의 권선 단말에 설치 가능하여 설치작업 및 동축케이블의 차폐선 접지가 용이하고, 고정자 권선에서 발생한 부분방전 신호만을 선택적으로 측정할 수 있으며, 기계적 충격과 열적 변형에 강한 유용한 효과가 있다. As described in detail above, the partial discharge measuring sensor during operation that can be installed in the winding terminal of the impregnated insulated high voltage rotor according to the present invention can be installed in the winding terminal of the impregnated insulated high voltage rotor, and thus the installation work and the shielding wire of the coaxial cable can be easily grounded. Therefore, only the partial discharge signal generated in the stator winding can be measured selectively, and it has a strong useful effect on mechanical shock and thermal deformation.
본 발명은 첨부된 도면을 참조하여 기술되는 바람직한 실시예를 중심으로 설명되었으나, 이에 한정되는 것은 아니며 당업자라면 이로부터 다양한 변형예를 도출할 수 있음이 명백하다. 따라서 본 발명은 이 같은 변형예들을 포괄하도록 의도된 특허청구범위에 의해 해석되어져야 한다.Although the present invention has been described with reference to the preferred embodiments described with reference to the accompanying drawings, it is not limited thereto and it will be apparent to those skilled in the art that various modifications may be derived therefrom. Therefore, the present invention should be construed by the claims intended to cover such modifications.
도 1 은 종래의 함침 절연 고압 회전기의 부분방전 측정센서의 예시도1 is an illustration of a partial discharge measurement sensor of a conventional impregnated insulated high pressure rotor
도 2 는 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서의 일실시예의 구조도Figure 2 is a structural diagram of an embodiment of a partial discharge measuring sensor during operation that can be installed in the winding terminal of the impregnation insulated high-pressure rotor according to the present invention
도 3 은 도 2 에서 도시한 부분방전 측정센서를 펼친상태를 도시한 도면FIG. 3 is a view illustrating an extended state of the partial discharge measuring sensor shown in FIG. 2;
도 4 는 본 발명에 따른 함침 절연 고압 회전기의 권선 단말에 설치 가능한 운전중 부분방전 측정센서의 설치상태도Figure 4 is an installation state diagram of the partial discharge measurement sensor during operation that can be installed in the winding terminal of the impregnation insulated high-pressure rotor according to the invention
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
10 : 고정자 철심 11 : 고정자 슬롯10: stator core 11: stator slot
20a, 20b : 권선 21 : 권선 단말20a, 20b: winding 21: winding terminal
22 : 절연층 23 : 반도전층22: insulating layer 23: semiconducting layer
30 : 웨지 40a, 40b : 부분방전 측정센서30: wedge 40a, 40b: partial discharge sensor
41b : 절연박판 42b : 부분방전 신호선41b: insulating sheet 42b: partial discharge signal line
43b : 접지용 동박판 44b : 동축케이블 차폐선43b: Ground copper foil 44b: Coaxial cable shielded wire
45b : 차폐막45b: shielding film
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-0010659A KR100499907B1 (en) | 2003-02-20 | 2003-02-20 | Partial Discharge Sensor for End Winding Installation in Global Vacuum Pressure Impregnation Processed Rotating Machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-0010659A KR100499907B1 (en) | 2003-02-20 | 2003-02-20 | Partial Discharge Sensor for End Winding Installation in Global Vacuum Pressure Impregnation Processed Rotating Machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20040075187A KR20040075187A (en) | 2004-08-27 |
| KR100499907B1 true KR100499907B1 (en) | 2005-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR10-2003-0010659A KR100499907B1 (en) | 2003-02-20 | 2003-02-20 | Partial Discharge Sensor for End Winding Installation in Global Vacuum Pressure Impregnation Processed Rotating Machine |
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| KR (1) | KR100499907B1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2983276B2 (en) | 2014-08-04 | 2020-01-29 | Siemens Aktiengesellschaft | Dynamo-electric machine with an insulation monitoring system |
| WO2019160168A1 (en) * | 2018-02-13 | 2019-08-22 | 주식회사 큐유아이 | Vehicle biometric signal checking system provided in vehicle, and operation method therefor |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20040075187A (en) | 2004-08-27 |
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