Sylmar Converter Station: Difference between revisions
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{{Short description|AC-DC power conversion station in Los Angeles, California}} |
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The '''Sylmar Converter Station''' is the southern converter station of the [[Pacific DC Intertie]], an [[electric power transmission]] line which transmits [[electricity]] from the [[Celilo Converter Station]] outside [[The Dalles, Oregon]] to [[Sylmar, Los Angeles|Sylmar]], a neighborhood in the northeastern [[San Fernando Valley]] region of [[Los Angeles]], [[California]]. The station converts the 500 kV [[direct current]] coming from the northern converter station Celilo to [[alternating current]] at 60 Hz and 230 kV synchronized with the Los Angeles power grid. The station capacity is 3,100 [[Watt#Megawatt|megawatts]].<ref>{{cite press release|title=ABB Rededicates Sylmar Converter Station|url=http://www.abb.com/cawp/seitp202/A719AD829B2496D085256FD4006BF446.aspx|date=March 24, 2005}}</ref> It is jointly owned by two electric utility providers, [[Southern California Edison]] and [[Los Angeles Department of Water and Power]]. |
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==History== |
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'''Sylmar Converter Station''' is the southern terminal of [[Pacific DC Intertie]] at [[Sylmar]], [[California]], [[USA]]. It consists of two parts, Sylmar A and Sylmar B. Sylmar A is the older of them. It was built in 1970 and used as valves originally three six-pulse groups of [[mercury arc valve]]s, designed for a [[voltage]] of 133 kV and a current of 1800 [[Ampere]]. In 1971 an [[earthquake]] destroyed the station. It was rebuilt without major changes. In 1985 voltage of Pacific Intertie was increased to 500 kV and a [[thyristor]] 12 pulse valve was added. In 1989 Sylmar B was built for hosting the thyristor valves of the extension. Sylmar B is switched in parallel to Sylmar A and is a few [[miles]] away. At the time, the mercury arc valves are replaced by thyristors. |
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[[File:Sylmar Converter Station.jpg|thumb|350px|Sylmar Converter Station (Sylmar East) with HVDC on the left most tower and Los Angeles alternating current on the towers to the right.]] |
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Originally [[mercury-arc valve]]s were used as static [[inverter (electrical)|inverter]] valves. The valves were series connected in three six-pulse valve bridges for each pole. The blocking [[voltage]] of the valves was 133 kV with a maximum [[current (electricity)|current]] of 1,800 [[ampere]]s, for a transmission rate of 1,440 megawatts with a symmetrical voltage of 400 kV against earth. |
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After the [[Sylmar earthquake]] in 1971, the static inverter station in Sylmar was reconstructed due to damage sustained. |
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In 1982, the power rating of the mercury arc valve rectifiers was raised by various improvements to 1,600 megawatts. |
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In 1985 two six-pulse valve groups of [[thyristor]]s were added to increase the voltage to 500 kV per pole for a total differential voltage of 1,000 kV. In 1989 the station was extended on the field east of the highway (called Sylmar East Converter Station), where two new 1,100 ampere, 500 kV 12-pulse thyristor converters were added [[Series and parallel circuits#Parallel circuits|in parallel]] with the two existing converters, giving a total transmission power of 3,100 megawatts (3,100 Amperes at +/-500 kV |
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In 2004, Sylmar East station was upgraded from 1,100 MW to 3,100 MW (rededicated as the Sylmar Converter Station in 2005). The controls and older converters, including the mercury arc valves, were completely replaced (in the same valve hall) by a single pair of 3,100 MW 12-pulse converters built by ABB. The upgrade was made to eliminate the environmental risks of [[Mercury (element)|mercury]] and to reduce the [[Maintenance, repair and operations|maintenance]] costs of the obsolete mercury arc valves. |
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==See also== |
==See also== |
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*[[Pacific DC Intertie]] |
*[[Pacific DC Intertie]] |
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== References == |
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{{reflist}} |
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{{commons category}} |
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{{Coord|34.312|-118.481|region:US-CA_type:landmark|display=title}} |
{{Coord|34.312|-118.481|region:US-CA_type:landmark|display=title}} |
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[[Category:Buildings and structures in Los Angeles |
[[Category:Buildings and structures in Los Angeles]] |
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[[Category:Western Interconnection]] |
[[Category:Western Interconnection]] |
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[[Category:Energy |
[[Category:Energy infrastructure in California]] |
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[[Category:Converter stations]] |
[[Category:Converter stations]] |
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[[Category:Sylmar, Los Angeles]] |
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Latest revision as of 14:04, 13 October 2023
 | This article needs additional citations for verification. (March 2013) |
The Sylmar Converter Station is the southern converter station of the Pacific DC Intertie, an electric power transmission line which transmits electricity from the Celilo Converter Station outside The Dalles, Oregon to Sylmar, a neighborhood in the northeastern San Fernando Valley region of Los Angeles, California. The station converts the 500 kV direct current coming from the northern converter station Celilo to alternating current at 60 Hz and 230 kV synchronized with the Los Angeles power grid. The station capacity is 3,100 megawatts.[1] It is jointly owned by two electric utility providers, Southern California Edison and Los Angeles Department of Water and Power.
History
[edit]
Originally mercury-arc valves were used as static inverter valves. The valves were series connected in three six-pulse valve bridges for each pole. The blocking voltage of the valves was 133 kV with a maximum current of 1,800 amperes, for a transmission rate of 1,440 megawatts with a symmetrical voltage of 400 kV against earth.
After the Sylmar earthquake in 1971, the static inverter station in Sylmar was reconstructed due to damage sustained.
In 1982, the power rating of the mercury arc valve rectifiers was raised by various improvements to 1,600 megawatts.
In 1985 two six-pulse valve groups of thyristors were added to increase the voltage to 500 kV per pole for a total differential voltage of 1,000 kV. In 1989 the station was extended on the field east of the highway (called Sylmar East Converter Station), where two new 1,100 ampere, 500 kV 12-pulse thyristor converters were added in parallel with the two existing converters, giving a total transmission power of 3,100 megawatts (3,100 Amperes at +/-500 kV
In 2004, Sylmar East station was upgraded from 1,100 MW to 3,100 MW (rededicated as the Sylmar Converter Station in 2005). The controls and older converters, including the mercury arc valves, were completely replaced (in the same valve hall) by a single pair of 3,100 MW 12-pulse converters built by ABB. The upgrade was made to eliminate the environmental risks of mercury and to reduce the maintenance costs of the obsolete mercury arc valves.
See also
[edit]References
[edit]- ^ "ABB Rededicates Sylmar Converter Station" (Press release). March 24, 2005.
