Southern Hami–Zhengzhou UHVDC

The Southern Hami–Zhengzhou UHVDC is an ultra high-voltage direct current power transmission line from the north-west to central China.

Hami–Zhengzhou UHVDC Transmission Project
Location
Country	China
Province	Yunnan, Guangdong
General direction	west-east
From	Hami, Xinjiang
Passes through	Xinjiang, Gansu, Shaanxi, Ningxia, Shanxi and Henan provinces
To	Zhengzhou, Henan
Ownership information
Owner	State Grid Corporation of China
Operator	Northwest China Grid Company
Construction information
Manufacturer of substations	ABB
Construction started	2012
Commissioned	January 2014
Technical information
Type	overhead transmission line
Type of current	Ultra HVDC
Total length	2,210 km (1,370 mi)
Power rating	8,000 MW
DC voltage	±800 kV
No. of poles	2

Background

It is the first ultra high-voltage project implemented by the Northwest China Grid Company, a subsidiary of the State Grid Corporation of China.^[1] Construction started on 13 May 2012. It went into operation in January 2014.^[2] Expected cost was 23.4 billion yuan.^[1]

Design

The line was designed and built by several different Chinese companies. Converter transformers and components were supplied by ABB Group,^[3] by XD Group,^[4] and by Siemens AG.^[5]

Operation

The transmission line starts at the Hami Nanhu converter station next to the Dananhu Power Station in Xinjiang and runs through Xinjiang, Gansu, Shaanxi, Ningxia, Shanxi and Henan provinces to Zhengzhou converter station in Henan.^[6] Its total length is 2,210 kilometres (1,370 mi). The line operates at ±800 kV voltage and is designed to have a transmission capacity of 8,000 MW, the highest in the world.^[1]

Coordinates

• Southern Hami–Zhengzhou UHVDC – Converterstation Hami 42°35′20″N 93°27′46″E
• Southern Hami–Zhengzhou UHVDC – Converterstation Zhengzhou 34°48′46″N 114°03′24″E

References

1. "Southern Hami-Zhengzhou ±800kV UHVDC Transmission Project, Second Xinjiang-Northwest Main Grid 750kV HVDC Transmission Line Start Construction to Build the Silk Road of Electricity Connecting the Western Frontier with the Central Plains" (Press release). State Grid Corporation of China. 2012-05-14. Retrieved 2012-11-27.
2. "China-EPRI Electric Power Engineering Co., Ltd". Archived from the original on 2014-04-20. Retrieved 2014-04-19.
3. "ABB wins power transformers order in China worth over $100 million" (Press release). ABB. 2012-11-27. Retrieved 2012-11-27.
4. "China XD to supply equipment for SGCC's UHVDC project". Global Transmission Report. 2012-10-16. Retrieved 2012-11-27.
5. "New order from SGCC: Siemens' biggest HVDC transformer order to date" (PDF;101KiB). Siemens AG. 2015. Retrieved 2019-01-31.
6. "Preliminary Assessments for Hami-Zhengzhou and Xiluodu-Western Zhejiang UHV DC Projects Completed" (Press release). State Grid Corporation of China. 2012-04-12. Retrieved 2012-11-27.

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