The pollution and smog weather in our country is spreading and nationalizing. The smog in this winter covers one-sixth of the country's land area. The increasingly smog weather has seriously affected the safe operation of the power grid. State Grid Corporation, China Southern Power Grid Corporation and other power grid operators have to invest heavily in the development and application of grid anti-pollution flash technology, and achieved outstanding results. Porcelain (glass) composite insulators provide new ideas and new products for the anti-pollution work of the power grid. Since 2003, China has successively hanged about 200 million pieces of porcelain (glass) composite insulators. The operation in the past ten years shows that the porcelain (glass) composite insulator can solve the problem of insufficient technical performance such as anti-pollution flash, lightning protection, zero value of porcelain insulator, high self-explosion rate of glass insulator and brittle broken string of composite insulator. . The porcelain (glass) composite insulator developed by Qingzhou Liwang Power Technology Co., Ltd. (referred to as “Liwang Power”) was rated as “International Innovation and Technology Leading” by experts in the industry. By the end of 2012, Qingzhou Liwang Power Technology Co., Ltd. has installed 1.87 million pieces of porcelain (glass) composite insulators, which has made important contributions to building a strong transmission line in China. Recently, the reporter interviewed Tang Yuanwen, chairman of Qingzhou Liwang Power Technology Co., Ltd.

 

As the "Top Ten Inventors of Weifang City" and the winner of the third "Invention and Entrepreneurship Award" in Shandong Province, Tang Yuanwen first introduced his experience of invention and creation. In 2000, Tang Yuanwen attended an anti-pollution flash conference in Shandong Province. At the meeting, Shandong Electric Power Research Institute proposed the topic of “Resistance of composite insulators for tensile rods”. After the meeting, Tang Yuanwen immediately invested in research and experimentation. The most difficult thing to overcome is to combine the two kinds of materials with different strengths and different characteristics, such as silicone rubber and porcelain. It must have certain high temperature and high pressure conditions, and must overcome the irregular characteristics of the surface of porcelain edges. Series of technical problems.

 

Tang Yuanwen found NGK Tangshan Electric Porcelain Co., Ltd., one of the best manufacturers of porcelain in China at that time, and hoped that they would cooperate with the development of new products of porcelain, but did not succeed. Tang Yuanwen constantly seeks suitable manufacturers to cooperate with the production of accessories, and continues to trial production. From the first set of production molds to the last trial production, it has undergone six major changes. In more than three years, the number of trials has reached hundreds of thousands of times, and sometimes the amount of material wasted a day is more than 100,000 yuan.

 

Under the simple conditions, Tang Yuanwen and the technicians solved the technical problems. In 2003, the process problems were basically solved, and the first batch of finished products in the first half of the year was off the assembly line. In November 2003, Tang Yuanwen's products were type tested at the National Insulator Arresters Quality Supervision and Inspection Center. In the same year, the porcelain composite insulators produced by the company were operated on several 35KV lines. In November 2005, two years after the operation of the network, the Science and Technology Department of Shandong Province and the Machinery Industry Office of Shandong Province jointly organized product appraisal. The appraisal report indicated that the product was the first in the world and the technology was leading.

 

Tang Yuanwen pointed out that porcelain (glass) composite insulators were used for the first time in the 110kV Jiangtu line project of Shandong Liaocheng Power Supply Company in 2003. By the end of 2012, Liwang Power's porcelain (glass) composite insulators had used 1.84 million on 821 lines. The film, which is distributed in 20 provinces, 1 autonomous region and 2 municipalities directly under the central government, has also been used in the UHV ±800 Jinsu line. On the line using Liwang Electric Porcelain (Glass) composite insulator, no abnormality has occurred in one line, and the operating unit has reflected well, ensuring safe operation of the power grid.

 

The porcelain (glass) composite insulator pioneered by Liwang Power International has excellent technical characteristics: it has stable and reliable mechanical properties; it has excellent resistance to flashover, and the pollution flashover voltage of each porcelain (glass) composite insulator is the same type. The traditional insulator of the specification has improved dirt resistance by 1.7 times, has better wind and rain self-cleaning ability, and has a slow deposition speed, which can meet the requirements of the creepage distance of the insulator string in the heavy-duty area running line; convenient transportation installation and maintenance, porcelain (glass The weight of the composite insulator is reduced by 1/3 compared with the porcelain insulator of the same type, which reduces the labor intensity of installation and the bearing pressure of the tower; the structure is unique and reasonable, and it is easy to use tool clamping during installation and replacement, and has good interchangeability.

 

Based on such technical characteristics, porcelain (glass) composite insulators solve a series of problems: solving the problem of flashover of porcelain and glass insulators. Ceramic (glass) composite insulators are processed by special processes on the surface of glass plates and related interfaces, silicone rubber. The composite jacket is made of a rigorous heat-vulcanization primary molding process to ensure the quality of the product. The silicone rubber composite jacket has good hydrophobicity and hydrophobic migration, and has strong anti-staining ability; it solves the common rod-shaped suspension composite insulator. "Brunch" problem, in the mechanical damage of organic composite insulators, the "brittle breaking" of the mandrel accounts for 60% of the broken core rod accidents, accounting for 35% of all mechanical accidents, porcelain (glass) composite insulator core The disc adopts a new technology to solve the problem of "crunchy break" of the core rod of the ordinary rod-shaped suspension composite insulator; and solves the problem that the composite insulator cannot be used for the tensile string resistance.

 

Porcelain (glass) composite insulators are more expensive than conventional insulators due to their complicated production process and high manufacturing cost. However, porcelain (glass) composite insulators have a long life cycle and do not require regular cleaning. This ensures maintenance-free transmission lines, greatly reduces maintenance personnel, greatly reduces line maintenance and maintenance costs, and more importantly, porcelain (glass). The composite insulator ensures the safety and reliability of the transmission line. It has been confirmed from the national 35kV to 500kV line for many years. Among all kinds of insulators, the porcelain (glass) composite insulator is an insulator that has never had any problem, achieving safety, efficiency and energy saving. Discharge, prevent disasters, and reduce the unity of employers. The cost performance of porcelain (glass) composite insulators is much higher than that of traditional insulators. It is the best solution for sustainable development and has a broad application prospect.

 

Under the leadership of Tang Yuanwen, the newly developed large-diameter epoxy core-pillar composite insulator has also been used in the UHV ±800KV project, which completely solves the problem of brittle fracture and power-off cleaning maintenance of porcelain post insulators. The expert appraisal result is “ First and foremost at home and abroad." Liwang Power has built a well-equipped high-voltage test center and established a provincial-level composite insulator engineering technology research and development center, with 65 patents, including 3 invention patents. The company has established product standards for two systems of composite insulators, AC and DC, together with experts from State Grid Corporation, China Electric Power Research Institute, China Power Engineering Consulting Group Corporation and State Grid Wuhan Research Institute. The company was recognized as “Shandong High-tech Enterprise”. The new ceramic composite insulator industrialization project is a science and technology small and medium-sized enterprise technology innovation fund support project of the Ministry of Science and Technology. The FXWP series ceramic composite insulator series products have been awarded “Shandong High-tech Products”. ", "Shandong Province SME Technology Progress First Prize".

 

Tang Yuanwen told reporters that innovation is the foundation of Liwang Power's strong service to strengthen the smart grid. Liwang Power has formed an annual production capacity of 1 million pieces of porcelain (glass) composite insulators. The company will continue to increase investment in innovation, build the world's largest R&D and production base of composite insulators, and make greater efforts to build a modern and strong smart grid. contribution.