Ultra High Voltage Abbreviation UHV; The voltage symbol is U (represented by V in some places); The unit of voltage is volts, and the unit symbol is also V; There are kV (kilovolts) that are larger than the voltage, mV (millivolts) and uV (microvolts) that are smaller than the voltage, and there are thousands of units between them. In China, ultra-high voltage refers to the voltage level of ± 800 kV and above DC and 1000 kV and above AC.
And China is the only country in the world that possesses ultra-high voltage technology. In the global ultra-high voltage field, China's standards are the only standards in the world.
China has submitted and approved nearly 600 ISO/IEC standards, leading the preparation of 39 international standards. The international standards such as ultra-high voltage and new energy access developed by China have become important norms for global engineering construction.