High voltage and low voltage grid connections are defined by the voltage levels they use.
High voltage grid connection is the term used to describe power transmission over 100kV, including super high voltage and ultra high voltage connections.
Ultra high voltage grid connections have transmission capabilities that are 24-5 times greater than that of 500kV super high voltage grid connections and are often referred to as "electricity highways"
Low voltage grid connection, on the other hand, refers to power transmission under 100kV, which is suitable for different scenarios of energy transmission and power distribution. The most commonly used AC transmission voltage levels in Chinaare 500kV, 330kV, 220kV, 110kV, 35kV, and 10kV. It's worth noting that the voltage levels used in grid connections can vary depending on the specific requirements of the power system and the region.
