Superconducting cables help solve power supply problems in megacities
Reporters learned from China Energy Construction Group on September 13 that the 10-kilovolt three-phase ultrasonic power plant was developed by the Shenzhen Power Supply Bureau and the Guangdong Electric Power Design Institute of China Energy Construction Group (hereinafter referred to as the Guangdong Institute) as a key core technology output unit. The conductive cable system provides help to effectively solve the problem of power supply in mega cities.
In recent years, as urban power load demand continues to grow, a series of problems such as saturated transmission line corridors and difficulty in obtaining land for power grid construction have become increasingly prominent. Power supply in central areas of super-large cities around the world is facing challenges.
According to the relevant technical person in charge of the Guangdong Institute, in order to overcome this world-class problem, under the leadership of China Southern Power Grid Shenzhen Power Supply Bureau, the Guangdong Institute established a special technical research group in 2017. Since then, it has conducted in-depth research on key superconducting power transmission technologies and participated in It has conducted more than 10 tests such as superconducting system tuning, hot and cold cycles, and large load tests. It has compiled the first international design standards for superconducting cable lines, and is the general contractor for the construction of a 10 kV Binhe to Xinghe superconducting cable demonstration project. Relying on this demonstration project, Guangdong Institute, as a key core technology output unit, participated in the research and development of 10 kV three-phase superconducting cable system and assisted in the transformation and implementation of this technological achievement.
“This superconducting system uses a new generation of high-temperature superconducting power transmission technology. It is mainly composed of key components such as superconducting cable bodies, terminals, refrigeration systems, and protection devices. It can realize large-capacity power transmission at low voltage levels and solve the problem of power generation in super-large cities around the world. It provides a new solution to the supply problem, with significant economic and environmental benefits.” said the relevant technical person in charge of the Guangdong Institute. ˆ
According to reports, the superconducting cable has a body diameter of only 17.5 centimeters, a total length of 400 meters, and a power transmission capacity of up to 43 megavolt amperes, which is equivalent to the power transmitted by five conventional cables of the same level. It can drive four high-speed trains at a speed of 350 kilometers per hour at the same time. Superconducting cable terminals adopt structural designs such as vacuum multi-layer insulation and high-voltage isolation insulation, which can effectively reduce terminal heat leakage, improve insulation performance, and achieve a reliable transition from superconducting cables to conventional power distribution systems.