Chinanews.com, Guangzhou, February 10th: A special "heart surgery"
Author Wu Tianlong Guo Jun
"Deng Gong, the monitoring and analysis console shows that there is an abnormal alarm on the UPS1 power supply in the mechanical room of the signal building of Dalang Station, and it needs to be dealt with immediately."
"Okay, come right away."
At 18:12 on February 5, Deng Guoqing, an engineer in the Guangzhou workshop of the Guangzhou Electricity Section of the Guangzhou Railway Group, received a call from a colleague. He quickly put down the Lantern Festival he had just eaten, put on his tool bag, and rushed to Dalang Station.
"If the signal equipment is the 'eyes' to ensure traffic safety, then the mechanical room is like the 'central nervous system', and the UPS power supply system is the 'heart' of the whole system." Deng Guoqing told reporters, "The signal equipment is to direct the train to run. , if the mechanical room fails, then the signaling equipment cannot function properly, just like a traffic light fails when driving.”
"Go, go to the mechanical room, look at the monitoring terminal, and analyze what went wrong." At 18:56, after Deng Guoqing arrived, he called Li Xiaobin, who was on duty, to enter the mechanical room for inspection.
After investigation, the terminal displays the first and thirty battery alarms.
"Open the UPS1 battery monitoring curve, and test and analyze the two batteries that have been alarmed." Deng Guoqing said firmly.
Deng Guoqing participated in the acceptance work of the transitional line switch Photo by Tan Xiangwei
Deng Guoqing introduced to reporters that each mechanical room has two "hearts", and a UPS power supply has 32 batteries in total. Time, they come in handy.
The monitoring curve is like the "electrocardiogram" of these batteries, which can intuitively reflect whether the power supply function is abnormal.
Deng Guoqing focused his eyes on the keyboard, and kept tapping the keyboard with his fingers. From the first section to the thirty-second section, he found that not only the internal resistance of the two batteries that the system was warning about was too high, but the internal resistance of the eighth battery was too high. There is also an upward trend.
Li Xiaobin asked: "Deng Gong, is this situation in the eighth section abnormal? Does it need to be replaced?"
"The average internal resistance value of a normal battery is generally 5.5 milliohms, but the internal resistance value of the two batteries that the system alarmed showed as 10.3 milliohms, and the internal resistance value of the eighth battery also increased. Hidden dangers need to be judged after further measurement.” After speaking, Deng Guoqing turned on his mobile phone to contact the manufacturer, planning to use the “skylight repair” that night to replace it.
At 1:14 in the morning, the bright moonlight fell on the window sill of the mechanical room.
The house was brightly lit, and Deng Guoqing heard the long-awaited voice from the radio in his hand: "The dispatch order has been issued, the number is 226703, and the vertical skylight at Dalang Station has been ordered, and the time is 60 minutes."
"Received the work in the building, now turn off the switch of the UPS1 power supply battery pack, and carry out the battery test and replacement operation." Deng Guoqing responded quickly.
He took out the battery capacity evaluation tester that he had already prepared, connected the test leads to both ends of the battery, and stared at the data on the screen without daring to blink.
Deng Guoqing participated in the cable acceptance check work Photo by Tan Xiangwei
"After measurement, the first, eighth, and thirtieth batteries were confirmed to be abnormal and need to be replaced." After Deng Guoqing reported the test results through the radio, he took out a screwdriver, carefully disconnected the two terminals of the battery's positive and negative poles, and inserted the new battery put on.
With 11 years of rich experience, he can change easily, and the whole process only takes 16 minutes.
"Deng Gong, thanks to you, you helped us eliminate a potential safety hazard." Li Xiaobin gave a thumbs up.
"It's okay. You need to learn more about failure cases and master how to deal with them. When troubleshooting hidden dangers, you have to be more careful, otherwise how can you ensure the safety of the train." Deng Guoqing patted Xiao Li on the shoulder and said, "Let's have a bowl of Lantern Festival together later. , Make up for what I didn’t finish eating yesterday.” (End)