Chinas Ultrahosen -Hochspannung „Electricity Highway“ -Projekt: Eine Sekunde Stromübertragung über 1500 km entfernt reicht aus, um einen Haushalt für zwei Jahre aufrechtzuerhalten

> In just 0.005 seconds, green energy from China’s Qinghai Province can be transmitted to Henan Province over 1,500 km away; one second of power transmission is enough to sustain a household for two years…This is the magic of China’s Ultra High Voltage Transmission Project.

> Ultra High Voltage (UHV) technology, often dubbed the „**highway of electricity**“, stands as one of gilded hallmarks of China’s manufacturing. From the operation of the first UHV project in 2009 to the present, China has built 19 Ultra High Voltage AC lines and 20 DC lines, with transmission lengths exceeding **40,000 km**, forming the main energy artery of the country’s „West-to-East Power Transmission“ initiative.

> Generally speaking, transmission voltages are categorized into high voltage, extra high voltage, and ultra high voltage. Ultra High Voltage transmission technology refers to **AC transmission of 1,000 kilovolts and DC transmission of ±800 kilovolts or above**.

> Compared to high voltage and extra high voltage, Ultra High Voltage has advantages such as **higher transmission efficiency, longer transmission distances, lower line losses, and land savings.**

> For instance, under the same power transmission conditions, the transmission distances of 1,000 kilovolts Ultra High Voltage AC and ±1,100 kilovolts Ultra High Voltage DC are four times and five times those of 500 kilovolts transmission lines, respectively, with line losses reduced to only 25%.

> Since the 1960s, developed countries like the United States, Japan, and the Soviet Union have conducted research on Ultra High Voltage transmission technology and have launched various projects. However, due to technical challenges and operational efficiency issues, **they eventually reduced or halted operations.**

> Dozens of research institutions and universities, over 200 equipment manufacturing enterprises, more than 500 construction units, and hundreds of thousands of people have participated in basic research, technology development, equipment manufacturing, system design, experimental verification, project construction, and commissioning operations of Ultra High Voltage, **overcoming 310 key technologies.**