Southern Hami–Zhengzhou UHVDC
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The Southern Hami–Zhengzhou UHVDC is an ultra
high-voltage direct current A high-voltage direct current (HVDC) electric power transmission system (also called a power superhighway or an electrical superhighway) uses direct current (DC) for electric power transmission, in contrast with the more common alternating curre ...
power transmission line from the north-west to central
China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
.


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 The State Grid Corporation of China (SGCC), commonly known as the State Grid, is a Chinese state-owned electric utility corporation. It is the largest utility company in the world, and as of 2022, the world's third largest company overall by re ...
. Construction started on 13 May 2012. It went into operation in January 2014. Expected cost was 23.4 billion yuan.


Design

The line was designed and built by several different Chinese companies. Converter transformers and components were supplied by
ABB Group ABB Ltd. is a Swedish-Swiss multinational corporation headquartered in Zürich, Switzerland. The company was formed in 1988 when Sweden's Allmänna Svenska Elektriska Aktiebolaget (ASEA) and Switzerland's Brown, Boveri & Cie merged to create ...
, by
XD Group China XD Group (Chinese “中国西电集团”) is a Chinese state-owned power engineering company and manufacturer of electrical equipment. The company was established in July 1959 and was formerly known as Xi'an Electric Machinery Manufactu ...
, and by
Siemens AG Siemens AG ( ) is a German multinational conglomerate corporation and the largest industrial manufacturing company in Europe headquartered in Munich with branch offices abroad. The principal divisions of the corporation are ''Industry'', '' ...
.


Operation

The transmission line starts at the Hami Nanhu
converter station An HVDC converter station (or simply converter station) is a specialised type of substation which forms the terminal equipment for a high-voltage direct current (HVDC) transmission line.Arrillaga, Jos; High Voltage Direct Current Transmission, se ...
next to the Dananhu Power Station in
Xinjiang Xinjiang, SASM/GNC: ''Xinjang''; zh, c=, p=Xīnjiāng; formerly romanized as Sinkiang (, ), officially the Xinjiang Uygur Autonomous Region (XUAR), is an autonomous region of the People's Republic of China (PRC), located in the northwest ...
and runs through Xinjiang,
Gansu Gansu (, ; alternately romanized as Kansu) is a province in Northwest China. Its capital and largest city is Lanzhou, in the southeast part of the province. The seventh-largest administrative district by area at , Gansu lies between the Tibet ...
,
Shaanxi Shaanxi (alternatively Shensi, see #Name, § Name) is a landlocked Provinces of China, province of China. Officially part of Northwest China, it borders the province-level divisions of Shanxi (NE, E), Henan (E), Hubei (SE), Chongqing (S), Sichu ...
,
Ningxia Ningxia (,; , ; alternately romanized as Ninghsia), officially the Ningxia Hui Autonomous Region (NHAR), is an autonomous region in the northwest of the People's Republic of China. Formerly a province, Ningxia was incorporated into Gansu in ...
,
Shanxi Shanxi (; ; formerly romanised as Shansi) is a landlocked province of the People's Republic of China and is part of the North China region. The capital and largest city of the province is Taiyuan, while its next most populated prefecture-lev ...
and
Henan Henan (; or ; ; alternatively Honan) is a landlocked province of China, in the central part of the country. Henan is often referred to as Zhongyuan or Zhongzhou (), which literally means "central plain" or "midland", although the name is al ...
provinces to
Zhengzhou Zhengzhou (; ), also spelt Zheng Zhou and alternatively romanized as Chengchow, is the capital and largest city of Henan Province in the central part of the People's Republic of China. Located in north-central Henan, it is one of the National ...
converter station in Henan. Its total length is . The line operates at ±800 kV voltage and is designed to have a transmission capacity of 8,000 MW, the highest in the world.


Coordinates

* Southern Hami–Zhengzhou UHVDC – Converterstation Hami * Southern Hami–Zhengzhou UHVDC – Converterstation Zhengzhou


References

{{DEFAULTSORT:Southern Hami-Zhengzhou UHVDC Electric power infrastructure in China HVDC transmission lines 2014 establishments in China Energy infrastructure completed in 2014