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on august 23 and august 30, 2016, shemar ehv ac 1000kv composite cross-arm tower passed complete sets of tests in china electric power research institute ehv ac test base and outdoor test base of hebei bazhou tower respectively, and test data is very close to the calculation result, which shows that ehv ac 1000kv composite cross-arm tower technology has been mature with conditions of the engineering application.

ehv ac 1000kv composite cross-arm tower has significant advantages in economy and technology, which has great significance to effective improvement of the reliability of ehv ac overhead transmission lines, and great reduction of the engineering cost of ehv ac transmission lines.

compared with original ehv ac 1000kv cup angle steel tower, the nominal height of composite cross-arm tower of shemar is reduced by 8m (15%), the angle steel consumption is reduced by 6.8t, tower weight is reduced by 12.2%, cubic amount of foundation concrete is reduced by 20%, corridor width is reduced by 22m (35%), tower base is reduced by 5m², and the consumption of foundation reinforcement is reduced by 10%, which make total cost of the tower reduced by 6%, and the advantage of the economy in double loop is more obvious. ehv ac 1000kv composite cross-arm tower of shemar significantly promotes the reliability, and the conductor is directly connected with the cross-arm terminal through the fitting, to effectively solve the problem of wind shift trip-out.

on august 23, deputy general manager liu zehong and the assistant to general manager yu xinqiang of state grid corporation of china led 31 leaders and experts of relevant units such as state grid corporation of china, jiangsu electric power company research institute, electric power planning & engineering institute, northwest electric power design institute, and xi’an jiaotong university to go to the outdoor test base of hebei bazhou tower and observe the experiment. after the experiment is completed, deputy general manager liu zehong held a symposium. at the symposium, the representatives of shemar reported research course, economic and technological advantages, application situation and global development trend of composite cross-arm tower, and the immense value of this revolutionary technology attracted high concerns from global power grid users, which was creating greater and greater value for the global industry.

present leaders and experts gave congratulations to that ehv ac 1000kv composite cross-arm tower of shemar passed the test and the test result is consistent with the calculation, and fully recognized economic and technological advantages of the product. the assistant to general manager yu xinqiang and deputy general manager liu zehong made a speech respectively, putting forward the requirement of further improvement of standard system for design, manufacture, installation, operation and maintenance, and comprehensively promotion and application in infrastructure project of state grid corporation ofchina.

deputy general manager liu zehong and the assistant to general manager yu xinqiang of state grid corporation of china made an important speech respectively, putting forward the requirement of relevant units for the formulation of standard specification in the next step, and comprehensive promotion and application in all-voltage class range.

the assistant to general manager yu xinqiang pointed out that the corridor of ehv ac 1000kv composite cross-arm tower is reduced by 21m, with more obvious economic advantage compared with 750kv composite cross-arm tower, which has great significance to the improvement of the economy of 1000kv overhead transmission lines. the assistant to general manager yu xinqiang also pointed out ehv ac 1000kv composite cross-arm tower has largely improved the reliability of transmission lines. because the conductor is directly connection with the composite insulation cross-arm by the fitting, without any space for wind shift, it is a reliable solution for wind shift trip-out. the assistant to general manager yu xinqiang requested relevant units to continue to complete various tests in the next step, and formulate corporate standard for design, manufacture, installation, operation and maintenance of products, to provide support for the standard for comprehensive promotion and application of subsequent project.

deputy manager liu zehong give congratulations to that ehv ac 1000kv composite cross-arm tower successfully passed the test, and the test result is consistent with the calculation. the success in the project is in sight, which is exciting. deputy general manager liu pointed out that the technological innovation in the next step of ehv ac project should focus on the reduction of cost under the premise of ensuring the reliability. the overhead transmission line is an important field for cost reduction of technological innovation, especially in the densely populated and industrialized areas. the construction cost of double-circuit transmission lines of the same ehv ac 1000kv tower is up to 16 million yuan/km, while the composite cross-arm tower is an important starting point for technological innovation. general manager liu said, the composite cross-arm tower has great significance to the reduction of construction cost of ehv ac transmission lines, and improvement of economy and competitiveness of ehv ac project. general manager liu requests relevant units to further optimize the design and improve the standard, thus to realize the maintenance-free composite cross-arm tower. general manager liu requests relevant departments to achieve comprehensive promotion and application to the infrastructure project based on the successful application of ehv ac/dc and 750kv composite cross-arm tower, thus to realize greater economic and social benefits.

from rubber seals absolutely solved the oil leakage and spill problem of substation equipment in 1996, to the composite cross-arm tower has largely improved economy and reliability of overhead transmission lines after 20 years, shemar has adhered to the corporate values of “the value creation is the most critical”, and focused on existing problems and sustainable development of power industry with the vision of “becoming the most innovative integrated service provider of new-material power equipment”, to provide solutions through technological innovation and promote industrial progress. in the future, shemar will continuously solve industry issues under the guidance of the development concept, to create value for users and the industry, thus to reflecting the value of shemar people.