State Grid operating company testing new converter control and protection system
Recently, the State Grid operating company Yibin Management Office maintenance staff to explore a new method to troubleshoot, significantly improve the efficiency of troubleshooting the DC control and protection system.
HVDC project control and protection system is very complicated. A converter station control and protection system drawings and documents have nearly 20,000 pages. Check the DC control protection system defects hidden danger comparable needle in a haystack. In the past, the converter station operation and maintenance personnel mainly through the analysis of the fault has occurred to identify the cause, and then modify the software, replace the hardware, and ultimately eliminate the hidden defects. However, it is not easy to find out potential hidden dangers that have not been exposed yet, consuming a lot of time and energy and the effect is not obvious.
Yibin management office is responsible for Fu Long, Jinping, Yibin three UHV converter station operation and maintenance management. Yibin Management Service Center second monitor Zhang Peng, has long been engaged in DC control and protection system operation and maintenance. He has in-depth study of the control and protection system of the three UHV converter stations, and has also been exploring a more scientific and effective way of troubleshooting. One day Zhang Peng saw a scientific essay about the fact that the human brain can not imagine what it has never seen before. He was inspired by the imagination, why not use a technical route to control the other to find the differences. These differences may be caused by different manufacturers based on different technical principles of design differences, but there may be some hidden dangers.
His idea was accepted by all members of the second class. At his suggestion, the second shift promptly set up a control and protection system hazard investigation team, and eight team members volunteered to participate. Since August, each member has selected a survey project to compare the similarities and differences between control and protection systems under different technical routes. After a short period of one month, 24 serious hidden dangers were found and 3 major hidden dangers should be concerned about during operation. Their month-long hidden investigation results were more than those of the entire management office in the past year.
While investigating potential hidden dangers and improving the quality of the control and protection system, the technical level of secondary maintenance personnel has also been significantly improved in this way. Jiang Zhangwei, who has just joined the workforce for one year, said: "After this type of comparative investigation, I deepened my understanding and understanding of the control and protection systems for various technological routes. No matter what station I am conducting overhaul, I am even more confident. "He is currently in the field alone, has been fully recognized new and old employees.
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