Special fiber optic cable applications

The breakthrough in localization and independent innovation of power grid equipment and technology depends on breakthroughs in core raw materials, industrial control technologies, and optical fiber sensing technologies. An important direction of these technologies is special optical fiber, special optical fiber industrial control, and networking. Technology and key fiber sensing technologies based on specialty optical fibers.

With the constant development and progress of various technologies in China, domestically, UHV DC and flexible DC transmission projects independently researched and developed by many units within Donet have been reported, and the technical level and industry status are in the process. However, special optical fibers using the converter valve and control networking technology have been monopolized by foreign manufacturers.

In the global specialty optical fiber industry, China's only Changfei Fiber Optic Cable Co., Ltd., through years of continuous research and development and accumulation, has introduced special optical fiber solutions for converter valves based on UHV DC transmission and flexible DC transmission projects. It took the lead in realizing the localization of key raw materials and truly enabled China's power electronics equipment manufacturing to achieve a transition from follow-up to overtaking. In particular, as reported in recent years, many projects such as UHV DC transmission, flexible DC transmission, and “back-to-back” projects have been completed in China, basically relying on special fiber solutions provided by Changfei Company to provide the national power grid The "zero accident, zero complaint" strong protection.

The converter valve plays a key role in UHV DC transmission and flexible DC transmission. AC or DC power can only be transmitted after the converter valve is commutated (as shown in Figure 1).

The core technologies of many power grids in China have been mastered and monopolized by foreign companies for many years, but in terms of UHV DC transmission, flexible DC transmission, new energy integration, power grid protection, power dispatch automation, power system security and monitoring, etc. Many upstream and downstream companies in China have achieved unprecedented breakthroughs, and gradually achieved independent innovation and localization of equipment raw materials, and in some areas have taken the forefront of the industry.

The breakthrough in localization and independent innovation of power grid equipment and technology depends on breakthroughs in core raw materials, industrial control technologies, and optical fiber sensing technologies. An important direction of these technologies is special optical fiber, special optical fiber industrial control, and networking. Technology and key fiber sensing technologies based on specialty optical fibers.