If normal temperature superconductivity is realized, UHV will fail？ Stop it, its application will only be wider!

　　Superconducting technology at room temperature has always attracted the attention of scientific and engineering circles, and many people think that it may bring many changes. However, some people worry that if normal temperature superconductivity becomes a reality, will UHV investment be meaningless or even wasted? In fact, this concern is based on a misunderstanding of the characteristics of superconductors.

　　First of all, it needs to be clear that although superconductors can conduct current with zero resistance, they cannot withstand infinite current. Therefore, if you want to use superconducting cable to transmit power, you still need to raise the voltage to reduce the current. This is very important, because even with superconducting cables at room temperature, EHV transmission is still necessary.

　　In fact, there are already some superconducting transmission lines. For example, there is a 35KV superconducting transmission line in Shanghai, with a current of 2,000 amperes and a length of 1.2km, which uses liquid nitrogen cooling technology. This shows that even at the current technical level, transmission through superconducting materials has been verified in practice.

　　It is worth mentioning that if the room temperature superconducting technology is truly realized, it will bring a wider application field for UHV transmission. Because superconducting materials have no loss in transmission current, it will be possible to realize ultra-long distance transmission. This means that in the future, we can build longer-distance UHV transmission lines and even realize transnational and transcontinental power transmission.

　　Therefore, the realization of room temperature superconductivity will not make UHV investment meaningless, on the contrary, it will provide more space for the development of UHV transmission technology. The application of superconducting technology will be more extensive, and UHV transmission will also become an important infrastructure connecting all parts of the world, promoting cross-regional allocation of power resources and energy interconnection.

　　To sum up, the realization of room temperature superconducting technology will not only bring new opportunities and challenges to UHV transmission, but also become an important tool to realize sustainable energy development and promote regional economic integration. Therefore, for UHV investment, there is no problem of squandering water. On the contrary, its prospects are broader. We should continue to pay attention to and support the research and application of superconducting technology and promote the innovative development in the energy field.