Zhejiang's largest capacity 220 kV transformer station put into operation

On February 26th, with the installation of the No. 4 main transformer of the 220 kV Phoenix Substation in Xiaoshan, Zhejiang, the transformer capacity reached 720,000 kVA, becoming the largest 220 kV substation in Zhejiang Province and the first in the province. It has 4 main transformers and a 220 kV substation with double mother and double segmented wiring.

On the same day, the four main transformers of the Phoenix Substation were operated simultaneously. The maximum load rate in the area was reduced from 92% to 65.3%, and the power supply capacity was increased from 510,000 kilowatts to 690,000 kilowatts, which is equivalent to 360 SMEs or 90,000 households. Residents used electricity to effectively ease the power shortage in the central and eastern regions of Xiaoshan.

It is reported that as the hub station of the highest county power grid in Zhejiang Province, the 220 kV Phoenix substation is responsible for the power supply task of 241,000 towns and 6 townships within 200 square kilometers, and is one of the three major power points in Xiaoshan District. In recent years, the phoenix in the electric power-intensive region has become severely overloaded. Although it has undergone expansion and upgrades twice, it still cannot meet the needs of regional development. In 2011, the maximum load density in the supply area reached 146.7 thousand kilowatts per square kilometer, and the substation load rate was as high as 92%, which was almost full.

To this end, in July 2011, the Phoenix substation launched a third expansion project, a new 180,000 kVA main transformer was built, five 35-kV intervals were expanded, and double-mother and double-segment substations were transformed.

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