View source for Shin-Shinano Frequency Converter

{{short description|HVDC back-to-back station in Japan}}
{{More footnotes needed|date=June 2019}}
{{Infobox power transmission line
| name                = Shin-Shinano Frequency Converter
| photo               = Shin-Shinano Frequency Converter.jpg
| caption             = Shin-Shinano Frequency Converter
| map                 = 
| map_caption         = 
| country             = [[Japan]]
| state               = 
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| coordinates         = {{coord|36|8|14|N|137|52|58|E|display=inline, title}}
| direction           = 
| start               = 
| through             = 
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| par                 = 
| owner               = TEPCO Power Grid<br>{{small|([[Tokyo Electric Power Company]])}}
| partners            = 
| operator            = 
| cable_manufacturer  = 
| cable_installer     = 
| cable_layer         = 
| substation_manufacturer= 
| substation_installer= [[Hitachi]] & [[Toshiba]]
| contractors         = 
| construction        = 
| expected            = 
| est                 = 1977
| decom               = 
| type                = Back-to-back
| current_type        = [[HVDC]]
| length_km           = 
| capacity            =
| AC_voltage          =
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| poles_no            = 
| circuits_no         =
}}
[[File:Power Grid of Japan as of 2008.png|right|thumb|250px|Location of Shin-Shinano and Japan's two utility frequencies]]

{{nihongo|'''Shin-Shinano Frequency Converter'''|新信濃変電所|Shin Shinano Hendensho}} is the designation of a [[back-to-back connection#Power transmission|back-to-back]] [[high-voltage direct current]] (HVDC) facility in [[Japan]] which forms one of four [[frequency changer|frequency converter stations]] that link Japan's western and eastern power grids. The other three stations are at [[Higashi-Shimizu Frequency Converter|Higashi-Shimizu]], [[Minami-Fukumitsu Frequency Converter|Minami-Fukumitsu]], and [[Sakuma Dam#HVDC frequency converter|Sakuma Dam]].

==Converter equipment==
The HVDC back-to-back facility Shin Shinano uses line-commutated [[thyristor]] converters. The station houses two converters, one of which opened in December 1977,<ref>Compendium of HVDC schemes, [[International Council on Large Electric Systems|CIGRÉ]] Technical Brochure No. 003, 1987, pp100&ndash;103.</ref> the other in 1992.  The original 1977 converter was one of the first thyristor-based HVDC schemes to be put into operation in the world and used oil-insulated, oil-cooled outdoor [[thyristor valve]]s supplied by [[Hitachi]] (60&nbsp;Hz end) and [[Toshiba]] (50&nbsp;Hz end). A special workshop was provided on the site, in which valve maintenance (for example replacing failed thyristors) could be carried out under clean conditions in order to avoid contamination of the oil.

The 1992 converter uses more conventional air-insulated, water-cooled thyristor valves. In 2008 the original 1977 converter was decommissioned and replaced by a third converter, similar in design to the 1992 converter but using [[thyristor#Photothyristors|light-triggered thyristors]].

The Shin-Shinano link operates with a DC link voltage of 125 kV for each converter. The station was initially rated at 300&nbsp;MW. In 1992, with the addition of the second 300&nbsp;MW converter, the maximum transferable power was uprated to 600&nbsp;MW.

==See also==
*[[Energy in Japan]]
*[[Kii Channel HVDC system]]
*[[HVDC Hokkaido–Honshu]]

==References==
{{Reflist}}

==External links==
{{commons category|Shin-Shinano frequency converter station}}
* [http://b4.cigre.org/Publications/Other-Documents CIGRÉ B4 Compendium of HVDC Schemes, 2009.] {{Webarchive|url=https://web.archive.org/web/20130226045206/http://b4.cigre.org/Publications/Other-Documents |date=2013-02-26 }}
* [http://www.tepco.co.jp/ir/kojin/supply/transformation-j.html Substations of the Tokyo Electric Power Company] {{in lang|ja}}
* [https://web.archive.org/web/20051115122606/http://www.transmission.bpa.gov/cigresc14/Compendium/SHINSHIN.htm www.transmission.bpa.gov/cigresc14/Compendium/SHINSHIN.htm] (archived copy)
* [https://web.archive.org/web/20051115122606/http://www.transmission.bpa.gov/cigresc14/Compendium/Shinshin%20Pictures.pdf www.transmission.bpa.gov/cigresc14/Compendium/Shinshin%20Pictures.pdf] (archived copy)

[[Category:Converter stations]]
[[Category:Electric power infrastructure in Japan]]
[[Category:Tokyo Electric Power Company]]
[[Category:Energy infrastructure completed in 1977]]
[[Category:Energy infrastructure completed in 1992]]


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