What is the transmission line with the highest voltage level in China, and what is its voltage level?

The transmission line is Changzhi-Jingmen line; Grade is the most stressful.

Voltage classification: safe voltage (below 36V); Low voltage (220V and 380v); Respectively); High voltage (10 kV -220 kV); Ultra-high voltage 330 kV -750 kV; EHV 1000 kV AC and DC above 800 kV.

The highest AC voltage level in China 1000kV (Changzhi-Jingmen line) was put into operation on February 30, 2008. The transmission lines under construction (Xiangjiaba-Shanghai, Jinping-Sunan UHV DC 800kV) are 500kv, 330kv, 220kv, 1 10kv, 66kv, 35kv, 10kv, 380/220V, of which 60kV.

Extended data:

The voltage level requirements stipulate that:

1. For large and extra-large industrial enterprises or civil buildings, three-level voltage is adopted, that is, the voltage of 1 10kV(220kV) or 35kV is reduced to 10kV by the regional substation (main step-down substation).

2. If there is medium-voltage electrical equipment, the first stage is reduced to 3-6 kV to supply power to the medium-voltage electrical equipment, and then the 3-6 kV is reduced to 0.38kV/0.22 kV to supply power to the low-voltage distribution equipment.

3. Medium-sized industrial enterprises or buildings adopt two-stage voltage, and the user substation reduces the voltage of 10 kV to 0.38 kV/0. 22kV, and then supply power to electrical equipment.

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