'Two power module output current is normal.' At 11:10 on November 28, Guangzhou Petrochemical No. 2 reformer cabinets, when adding redundant power modules after the last set of operations is completed, the 'main hand' clock Eagle Eagle gently Gentle tone, the tension between the cabinet is also relaxed.
Some time ago, No. 1 distillation unit due to system power failure affecting the device is producing, in order to prevent the recurrence of similar failures, instrument control center in the affair, launched a half-month up and down linkage, comprehensive coverage, without leaving the power Classified special hidden trouble investigation.
The investigation found that some systems 24V redundant power supply module in the configuration there is a security risk.Among them, the No. 7 reformer system 7 group controller configuration 24V power supply unit are not redundant modules, once the redundant power supply One of the power supply output short-circuit fault, will result in power loss DCS system, the corresponding control loop out of control, to the device running a great potential hazard.
In order to eliminate the hidden danger as soon as possible, the instrument control center elaborately plans to add redundant power supply modules, continuously refine the construction plan and do offline test of redundant power supply modules.
On the basis of full implementation of risk prevention measures, seven power redundancy modules were officially added on line at 9:30 on November 28. Lin Xinghua, deputy director of the Instrument Control Center, was in charge of on-site command, mechanical power department and production dispatching department, etc. Unit leaders are also on-site guidance.
Zhong Xiongying, the deputy squad leader with rich experience in reorganization, serves as the guardian of the main knife and technician Yuan Guanwei, who carefully insulates the metal parts around the terminals of the power output terminals and the metal parts of the redundant module terminals to prevent the circuit from being short-circuited to ground and Carefully confirm the working status of the two power supply.
Yuan Guanwei read out after repeated practice of the technical program and make parameter records, Zhong Xiong Ying meticulous operation in accordance with the technical program steps saw Chung Horn Eagle skillfully cut out all the way to power, access redundant modules, to be normal after the vote and then the other way Cut out, and then access redundant modules ......
After nearly two hours of hard work, seven groups of redundant power supply module online replacement work successfully completed.Add redundant power supply module, you can effectively avoid redundant power supply Single power supply output short circuit failure affect the operation of the DCS system, the power of the instrumentation system Reliability has been further improved, safe and stable production of devices more secure.
