Sun, born in May 2005, 1973, graduated from our school majoring in railway power supply, party member. Now I have a bachelor's degree and a first-class maintenance electrician. He is currently the chief technician of the power supply department of the mechanical and electrical department of Wuhan Metro Operation Co., Ltd., enjoying the special allowance of the State Council. He has successively won the honors of national technical expert, Hubei province arts and crafts artist, Hubei province chief technician, Chutian city arts and crafts master in Hubei province, and national urban rail transit "Fifth Five-Year" labor competition maintenance expert. The studio he led was awarded the national skill master studio.
First, superb skills, abide by the responsibility of "saving electricity".
In recent years, the weaving line of Wuhan subway has developed by leaps and bounds, from opening a new line every year to completing the task of two or three new lines every year. Based on the concept of "disease can cure disease", Sun pioneered the establishment of a power supply test workshop for Wuhan Metro. In 9 major projects of urban rail transit construction, 6,495 sets of equipment in 384 substations were organized to carry out preventive tests in 8 major events and nearly 100 minor events. Through massive data analysis, fault prediction, preventive maintenance, elimination of security risks, solution of 6 major system risks and timely treatment of 40 major faults, the safe and stable operation of the power supply system is ensured, which has made outstanding contributions to the sound and rapid development of Wuhan Metro and the operation of super-large network.
In the major technical transformation work of Wuhan subway power supply, he bravely shouldered heavy burdens and dared to take responsibility. In 20 16, he led the team to successfully complete the first phase of Wuhan metro 1 line 10 kV protection device and power monitoring system renovation project with high quality and efficiency one month ahead of schedule. In 20 18, Sun once again faced difficulties and was responsible for the transformation of the 750V traction power supply system in the first phase of Wuhan Metro 1 Line. From 20 19 to 202 1, Sun Yong undertook the transformation task, and independently completed the transformation of the 400V frame circuit breaker and PLC on 1 line. Under the harsh conditions of heavy tasks, tight construction period, many interfaces between renovation equipment and operation equipment and cross-operation, he proposed the "four-time reverse connection method" construction method, established six categories and sixteen accounts, pioneered the "ten-moving ring" construction method, and implemented dynamic process control, which greatly improved work efficiency. The renovation project has achieved "zero mistakes, zero hidden dangers and zero accidents", and completed the main project one month ahead of schedule, creating a miracle of the shortest renovation time for similar equipment in China.
Second, overcome difficulties and promote the improvement of operational quality.
In the renovation project of the internal board circuit of the protection device of Wuhan Metro 1 Line 10 kV, Sun Ke overcame the technical monopoly and tight supply of goods, and led the technical team to overcome difficulties. Through repeated research and attempts on the faulty board, the renovation and safety demonstration of the board circuit were finally successfully completed, which ensured the normal operation of the equipment and greatly reduced the cost. This single item saved more than 500,000 yuan for enterprise production.
Aiming at the qualitative and quantitative problem of the original test instrument for current increment protection (DDL protection) of switchgear, in order to simulate the actual fault more accurately and improve the accuracy of protection, Sun refused to follow blindly, studied hard, reformed the test instrument independently, realized the quantitative verification function, and gave technical guidance to manufacturers without reservation to promote the transformation and upgrading of the test equipment. Under his guidance, the equipment was mass-produced, which promoted the DDL protection test function in the industry to a higher level.
As the golden line of Wuhan subway traffic, Line 2 has capacity bottleneck. In order to overcome this technical difficulty, Sun studied the power supply capacity, protection setting value and equipment performance of switchgear through 44 high-current tests for more than one month, and formed a set of protection setting and test experience for reference and promotion, which provided power supply quality guarantee for "increasing traffic density and shortening traffic interval" of Line 2. This achievement provides a scientific and feasible experimental experience basis for improving the transportation capacity of the whole line, and provides a guarantee basis for guiding and promoting the further improvement and optimization of the transportation capacity of Wuhan Metro, which facilitates passengers' travel and benefits the general public.
Third, be innovative and efficient, and build a project "incubator".
As an important equipment of traction power supply system in Wuhan metro, contact rail directly affects the safe operation of metro power supply system and even the whole metro. In view of the accident that the subway in a foreign city was stopped for two days due to contact rail fault, Sun led the research group to conduct extensive research, decided to develop the scheme of temporary support base for contact rail, made a prototype of the contact rail emergency repair base, invented the "temporary support base for contact rail" with completely independent intellectual property rights core technology, and obtained the national patent certificate for utility model. This patented product is the first in China. At present, Wuhan metro has produced 149 sets and applied them to the whole network, which can not only greatly shorten the time of contact rail fault repair, but also meet the demand of Wuhan metro for contact rail repair, and provide reference and practical basis for contact rail repair in other cities, and further improve the level of contact rail repair in urban rail transit in China.
Sun led the skill master studio team to carry out the innovative project "New 750V grounding wire rail end fixture" and won the national utility model patent invention, which greatly improved the work efficiency, reduced the contact resistance and ensured the work safety. At the same time, in order to quickly detect and display the longitudinal and transverse parameters of the contact rail, Sun instructed the studio team to carry out the innovative project of "electronic detection vehicle for contact rail parameters" and obtained the national utility model patent. This product is the first in China to continuously measure the operation data of the contact rail, which greatly improves the work efficiency and won the excellent project award of the second "Workers' Cup" Innovation and Entrepreneurship Competition in Wuhan.
The safety and reliability of subway DC system equipment are the basic conditions to ensure the safe operation of subway. In order to find the fault circuit of switchgear control quickly and accurately, Sun summarized the fault experience of DC circuit breakers in Wuhan Metro, compiled a PLC diagnostic program, and developed an "automatic fault detector for DC circuit breakers", which can quickly detect 1 81terminal and 2 16 conductor within1minute. At the same time, the national patent product of utility model designed and produced by him and the environmental control technical team of the studio-"all-in-one machine for descaling and passivation of heat exchangers" has obvious cleaning ability and energy-saving effect, among which Wuhan Metro Lines 2, 3, 4 and 7 will save about 6.5438+0 million kWh of electricity in 2020.
The skill master studio led by Sun won the title of "National Skill Master Studio". The studio has successively carried out 27 innovation projects, including 18 innovation achievements, 5 achievements transformation and 4 patents, and won 1 provincial innovation project award and 2 municipal innovation project awards.
Fourth, set an example and pass on the positive energy of the example.
As a mentor of the new apprenticeship system, Sun keeps learning the cutting-edge technology of rail transit power supply equipment and summarizes the new skills of equipment maintenance in the industry. He organized personnel to comprehensively sort out all kinds of maintenance procedures and training materials of power supply specialty, forming a text of about 654.38+ 10,000 words. According to the requirements of "artisans", apprenticeship training is carried out through systematic, professional, customized and project-based mechanisms. At present, 845 apprentices have been trained, 58 of whom have become technical backbones, and 15 have won honors at or above the municipal level. Relying on the theory and training platform of the company's education and training center, we will carry out advanced apprentice training, impart professional knowledge and operational skills to apprentices, develop excellent apprentice training by using special equipment and project research and development of the skills master studio, and impart cutting-edge research to apprentices. During the epidemic in 2020, with a high sense of responsibility and mission, Sun stuck to the front line of power protection and sank to the front line of the community. He used "words and deeds" to drive his disciples to participate in the fight against the epidemic, and demonstrated the professionalism of craftsmen during the war "epidemic" with practical actions. 202 1 During the rainstorm in Zhengzhou, Henan Province, he took the initiative to sign up for an expedition and went to the front line of Zhengzhou subway to participate in the emergency repair work, and passed a strong example to young employees with practical actions.