apparatus for determination of dissolved gases in insulation oil of transformer using optical fiber

The present invention relates to an apparatus for detecting multiple gases in oil in a transformer by using an optical fiber, which comprises: a first light transmission terminal for transmitting the light emitted by a light source and then transmitted through a first distribution channel of a light distributor to the inside of a transformer filled with insulating oil; a first gas detection unit composed of a first light reception terminal which is spaced apart from the terminal of the first light transmission terminal to receive and then guide the light emitted by the first light transmission terminal; a side surface polished optical fiber embedded in the inside of a transformer to have a polished area polished partly in a clad layer on the substrate and inserted in a curved way into the substrate to guide the light transmitted through a second distribution channel of the light distributor; a second gas detection unit having a first reactive layer formed from a material which reacts with a gas to be inspected on the top surface of the substrate including the polished area; a first light detector for detecting light outputted by the first light reception terminal; a second light detector for detecting light which passes through the side surface polished optical fiber; and a measuring unit for measuring a kind and concentration of a dissolved gas thermally decomposed in insulating oil by using signals outputted by the first and second light detectors. According to the present invention, the kind and concentration of a thermally decomposed gas in insulating oil can be detected by using light transmitted through an optical fiber. 본 발명은 광섬유를 이용한 변압기 내 유증 복합가스 검출장치에 관한 것으로서, 광원에서 출사되는 광을 광분배기의 제1분배채널을 통해 전송된 광을 절연유가 충진된 변압기 내부까지 전송하는 제1광전송단과, 제1광전송단의 종단과 이격되게 배치되어 제1광전송단으로부터 출사되는 광을 입사받아 도파하는 제1광수신단으로 된 제1가스검출부와, 변압기 내부에 내장되며 기판 위에 클래드층이 일부 연마된 연마부분을 갖으며 기판에 굴곡지게 삽입되어 광분배기의 제2분배채널을 통해 전송된 광을 도파하는 측면 연마형 광섬유와, 연마부분을 포함한 기판 상면에 검사대상 기체에 반응하는 소재로 형성된 제1반응층을 갖는 제2가스검출부와, 제1광수신단에서 출력되는 광을 검출하는 제1광검출기와, 측면 연마형 광섬유를 거쳐 진행되는 광을 검출하는 제2광검출부와, 제1 및 제2광검출부에서 출력되는 신호를 이용하여 절연유에 열분해되어 용해된 가스 종류 및 농도를 측정하는 측정부를 구비한다.