The Temperature Alarm System Of The Switchgear’s Contactor

High voltage switchgear is a very important link of the entire power system, and itis of vital importance to the safe operating of the system. The safe operating of theswitchgear affects the reliable power utilization of the users directly. The contactor’sover temperature of the high voltage switchgear is an important reason that leads tousing the real-time detection of damage contactor’s temperature is an unnecessarymeasure to guarantee the safe operation.Fiber Optic Sensor(FOS)developed very fastamong all kings of sensors that used to test temperature on line. Now, it could beused to realize pressure, temperature, sound field, electric field, angular speed andaccelerated speed, and also achieve the measuring tasks that still couldn’t beaccomplished with present techniques. It shows unique ability in both Strongelectromagnetic interference and high voltage environment.The paper firstly introduced several methods and their advantages anddisadvantages of traditional test of switchgear’s contact temperature. Based on thisintroduction, it concluded the merits to test with fiber grating temperature sensor andput forward the testing system based on fiber brag grating temperature sensor ofswitchgear’s contact temperature. This system which mainly include， C8051Fmicrocontroller，fiber Bragg grating temperature sensor，RS-485communicationmodule， MGLS-19264LCD and some peripheral circuit， can offer a betteranti-interference performance test method to test the temperature. Though the teeth ofa saw wave of the signal processing control mold piece creation scanning electricvoltage and add in PZT to press to give or get an electric shock a porcelain andceramics, make PZT press to give or get an electric shock porcelain and ceramicsoccurrence to correspond stretch and shrink, change the F-P filter chamber length thus,also changed through the wave-length of filter.Filter at adjust the Xie electric voltagecontrol function under scan whole fiber-optic light grid glint spectrum, be lead awave-length and glint wave-length equal, the locator acquires biggest only strongcombine will most the strong light signal convert to in response to telecommunication, the Feng telecommunication is worth at this time to should need to be measured totouch some temperature at the switch cabinet.After control centre logarithmsaccording to carry on analytical processing, get switch cabinet to should touch toorder an on-line temperature value.In The Last of this Article, commissioning，test methods, and the a simple analysisof data was introduced of the switchgear contacts temperature detection system. It iscome to a conclusion that the use of optical fiber Bragg grating temperature sensor fortemperature detection really has the high stability and reliability...