Zhoushan HVDC was the first
HVDC
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 ...
scheme built in
China and first put into service in July 2014.
Construction started on Zhoushan HVDC in 1984 and completed in 1986. It was built by Heavy Machine Factory,
Beijing
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Beijing ( ; ; ), alternatively romanized as Peking ( ), is the capital of the People's Republic of China. It is the center of power and development of the country. Beijing is the world's most populous national capital city, with over 21 ...
, Red Flag cable plant and Shanghai Relay Factory.
Zhoushan HVDC went in-service on December 1, 1989.
Description
Zhoushan HVDC is a bipolar HVDC connecting the power grid of
Zhoushan island
Zhoushan Island is the principal and namesake island in the Zhoushan Islands, formerly romanized as the ChusanIslands, an archipelago administered by Zhoushan Prefecture in Zhejiang Province in the People's Republic of China. It is the provinc ...
with the Chinese mainland. There is a
submarine power cable (±200kV DC) that is 129 kilometers long and a
transmission line
In electrical engineering, a transmission line is a specialized cable or other structure designed to conduct electromagnetic waves in a contained manner. The term applies when the conductors are long enough that the wave nature of the transmi ...
(200kV) that is 11 kilometers long.
The
static inverters are equipped with
thyristor
A thyristor () is a solid-state semiconductor device with four layers of alternating P- and N-type materials used for high-power applications. It acts exclusively as a bistable switch (or a latch), conducting when the gate receives a current ...
s and designed for a voltage of 200 kV and a maximum transmission rate of 50 MW.
The inverters are the six-pole type, giving the station more extended
harmonic filters than others. As transformers on the mainland a three winding type 115/83/10kV is used and on Zhenshou island a three winding type 38.5±2×2.5%/81/10kV is used. The
reactive power of the used harmonics filters is 23.5 MVAr at Ningbo station and 24.5 MVar at Gao Tongge station on Zhoushan.
The smoothing reactor has an inductance of 1.27
H.
Coordinates
The inverter plants are:
* Ningbo static inverter plant
* Gao Tongge static inverter plant
See also
*
Zhoushan Island Overhead Powerline Tie
References
External links
* https://web.archive.org/web/20110707014542/http://hvdc.chinapower.com.cn/membercenter/sitebuild7/viewarticle.asp?user=hvdc&tempname=hvdc&articleid=10000240
{{Energy in the People's Republic of China
Electric power infrastructure in China
HVDC transmission lines
Submarine power cables