The National Distribution Grid Structure
HV, MV, and LV distribution networks comprise the distribution network in China. The
voltage levels are divided as follows:
The HV distribution network is usually supplied by 35 kV, 66 kV, or 110 kV, as well as
220 kV for high-density load.
The MV distribution network is supplied by 6 kV or 10 kV, with only a few by 20 KV.
The LV distribution network is supplied by 220 V/380 V.
HV Level: During the normal operating condition, the voltage bias of the point of common
coupling (PCC) between a PV plant and power system should between -10%UN ~+10%UN.
Five typical structures are commonly used for the HV network in Chinese city, including
radiation, ring, link, T-type, and hybrid wiring. The radiation type is suitable for a 110(66)-
kV end substation and a 110(66)-kV station without a second source┻ The ぱ-wiring with
two sources is applicable in the areas where there are needs for strong connection,
frequent changes in operation, or severe requirements for load density and reliability
between two 220-kV-substations. The chain-wiring with two sources applies in situations
when
1) two or three 110(66)-kV substations are located in the same transmission corridor,
which can supply source lines on the unified tower; or
2) there are needs for strong connection, frequent changes in operation, or severe
requirement for load density and reliability between two 220-kVsubstations.
The hybrid wiring is suitable for regions in which load grows very fast and requires high
reliability
The National Distribution Grid Structure HV, MV, and LV distribution networks comprise the distribution network in China. The voltage levels are divided as follows: The HV distribution network is usually supplied by 35 kV, 66 kV, or 110 kV, as well as 220 kV for high-density load. The MV distribution network is supplied by 6 kV or 10 kV, with only a few by 20 KV. The LV distribution network is supplied by 220 V/380 V.HV Level: During the normal operating condition, the voltage bias of the point of common coupling (PCC) between a PV plant and power system should between -10%UN ~+10%UN. Five typical structures are commonly used for the HV network in Chinese city, including radiation, ring, link, T-type, and hybrid wiring. The radiation type is suitable for a 110(66)-kV end substation and a 110(66)-kV station without a second source┻ The ぱ-wiring with two sources is applicable in the areas where there are needs for strong connection, frequent changes in operation, or severe requirements for load density and reliability between two 220-kV-substations. The chain-wiring with two sources applies in situations when 1) two or three 110(66)-kV substations are located in the same transmission corridor, which can supply source lines on the unified tower; or2) there are needs for strong connection, frequent changes in operation, or severe requirement for load density and reliability between two 220-kVsubstations. สายผสมเหมาะสำหรับภูมิภาคในการโหลดที่เติบโตอย่างรวดเร็ว และต้องการสูง ความน่าเชื่อถือ
การแปล กรุณารอสักครู่..
