The optical fiber grating on-line temperature measurement system produced by Shanghai Former Optoelectronics Technology Co., Ltd. has been applied in Shifodong Substation in Guizhou Province. The substation has 10kV and 35kV switch rooms with a total of 12 35kV switchgear cabinets and 19 10kV switchgear cabinets. The six static contacts of the switchgear cabinet are equipped with fiber grating temperature sensors to realize real-time on-line monitoring of the temperature change of the 31-face switch cabinet contacts. The main equipment of the system includes: 186 QST200 fiber grating temperature sensors, one QSA01-16 fiber sensor analyzer, and one industrial control host.
Six QST200 Fiber Bragg Grating Temperature Sensors installed in each switch cabinet are star-connected to an optical fiber via a QSC01-06 optical splitter and led to the cable trench below the switchgear cabinet; The two optical fibers from the cabinet are communicatively connected to a single optical fiber in the main transmission cable through a single QSC01-02 optical splitter in the cable channel. Therefore, a single-mode, 16-core metal-free optical fiber cable is used as the transmission main optical cable. The QSA01-16 optical fiber sensor analyzer is placed in the main control room and realizes the real-time acquisition of temperature data of 186 QST200 fiber grating temperature sensors in 10kV and 35kV switch rooms of 2.2km outside through a 16-core transmission main fiber cable. The temperature acquisition frequency can be set through software. The minimum time for a single acquisition of all temperature measurement points is only 0.04 seconds. The temperature data monitored by the QSA01-16 fiber sensor analyzer is uploaded to the industrial control host through the 10/100M Ethernet, and all the temperature measurement is performed by the "front optical fiber online temperature measurement analysis software V1.0" running on the industrial control host. Data acquisition, display, storage and automatic alarm. The software is developed based on the "Web Kingview Web Edition". It supports temperature map information electronic map display, log query, report printing, multi-condition alarm settings (high temperature warning, high temperature alarm, Temperature rise rate alarm, regional temperature difference alarm, etc. and remote Web access. Once the over-temperature overheat of the switch cabinet's static contact occurs, the sound and light alarm action can be automatically controlled, and the corresponding over-temperature alarm message of the switch cabinet is automatically sent to the management. Personnel on the phone. The communication room and the main control room are connected through the internal LAN. The background workstation placed in the communication room can view the running status of the contact temperature of the 31 switch cabinets in the switch room through the Web, including the current temperature, real-time temperature curve, historical temperature curve, and online Temperature logging system operation logs and management and maintenance information.
At present, the system has been operating normally for several months, and it has been successfully monitored once for abnormal temperature fluctuations caused by poor contact between the moving contacts and static contacts of the switchgear, and an alarm message was issued. After the fault treatment, the system shows that the temperature of the measuring point has returned to normal. The system has withstood the test of the actual environment of the transformer station. Practice has proved that it has long-term stable performance, can accurately monitor the temperature changes in the power switch cabinet, and reduce the losses caused by faults in the substation. The system can be connected to the management network in the station to share information and improve the safety and economy of the substation.![]()
Six QST200 Fiber Bragg Grating Temperature Sensors installed in each switch cabinet are star-connected to an optical fiber via a QSC01-06 optical splitter and led to the cable trench below the switchgear cabinet; The two optical fibers from the cabinet are communicatively connected to a single optical fiber in the main transmission cable through a single QSC01-02 optical splitter in the cable channel. Therefore, a single-mode, 16-core metal-free optical fiber cable is used as the transmission main optical cable. The QSA01-16 optical fiber sensor analyzer is placed in the main control room and realizes the real-time acquisition of temperature data of 186 QST200 fiber grating temperature sensors in 10kV and 35kV switch rooms of 2.2km outside through a 16-core transmission main fiber cable. The temperature acquisition frequency can be set through software. The minimum time for a single acquisition of all temperature measurement points is only 0.04 seconds. The temperature data monitored by the QSA01-16 fiber sensor analyzer is uploaded to the industrial control host through the 10/100M Ethernet, and all the temperature measurement is performed by the "front optical fiber online temperature measurement analysis software V1.0" running on the industrial control host. Data acquisition, display, storage and automatic alarm. The software is developed based on the "Web Kingview Web Edition". It supports temperature map information electronic map display, log query, report printing, multi-condition alarm settings (high temperature warning, high temperature alarm, Temperature rise rate alarm, regional temperature difference alarm, etc. and remote Web access. Once the over-temperature overheat of the switch cabinet's static contact occurs, the sound and light alarm action can be automatically controlled, and the corresponding over-temperature alarm message of the switch cabinet is automatically sent to the management. Personnel on the phone. The communication room and the main control room are connected through the internal LAN. The background workstation placed in the communication room can view the running status of the contact temperature of the 31 switch cabinets in the switch room through the Web, including the current temperature, real-time temperature curve, historical temperature curve, and online Temperature logging system operation logs and management and maintenance information.
At present, the system has been operating normally for several months, and it has been successfully monitored once for abnormal temperature fluctuations caused by poor contact between the moving contacts and static contacts of the switchgear, and an alarm message was issued. After the fault treatment, the system shows that the temperature of the measuring point has returned to normal. The system has withstood the test of the actual environment of the transformer station. Practice has proved that it has long-term stable performance, can accurately monitor the temperature changes in the power switch cabinet, and reduce the losses caused by faults in the substation. The system can be connected to the management network in the station to share information and improve the safety and economy of the substation.