Global organisation
Ultra-high-voltage electricity transmission (UHV electricity transmission) has been used in China since 2009 to transmit both alternating current (AC) and direct current (DC) electricity over long distances separating China's energy resources and consumers.
China defines those sending direct currents (DC) at voltage levels of 800 kilovolts (kV) or above and alternating currents (AC) at 1,000 kV or above as UHV links. DC systems can carry more power with less loss than AC, and are used to cover greater distances, but they are more expensive to build.
UHV refers to voltage levels with direct current over ±800 kV and alternating current over ±1000 kV. Compared with high voltage (HV) transmission technology, UHV power transmission has the advantages of large transmission capacity, long transmission distance, and low line loss (Liu 2015).
Compared with high voltage (HV) transmission technology, UHV power transmission has the advantages of large transmission capacity, long transmission distance, and low line loss (Liu 2015). The Jindongnan-Nanyang-Jingmen UHV transmission line is the first UHV alternating current transmission project in China.
The Jindongnan-Nanyang-Jingmen UHV transmission line is the first UHV alternating current transmission project in China. It was completed and put into operation in 2009. By the end of 2020, 30 UHV lines in China had been put into operation (Tan et al. 2022). The inter-regional UHV transmission grid is an essential part of the power system.
Different countries have different thresholds for what is considered a UHV line. China defines those sending direct currents (DC) at voltage levels of 800 kilovolts (kV) or above and alternating currents (AC) at 1,000 kV or above as UHV links.
With the preliminarily formed UHV backbone power grid, UHV transmission technology will be further applied according to the situation of energy in China, and the short-term goal is to form a UHV backbone power grid …
OverviewBackgroundTransmission and distributionUHV transmission worldwideReasons for UHV transmission in ChinaSee alsoExternal links
Ultra-high-voltage electricity transmission (UHV electricity transmission) has been used in China since 2009 to transmit both alternating current (AC) and direct current (DC) electricity over long distances separating China''s energy resources and consumers. Expansion of both AC and DC capacity continues in order to match generation to consumption demands while minimizing transmission losses. Decarbonization improvements will result from the replacement of lower effic…
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This chapter introduces the development of UHV transmission systems and the construction of EHV/UHV transmission projects, as well as key technologies for UHV …
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Energilagringsteknik blir allt viktigare för att integrera förnybara energikällor i elnätet. Dessa lösningar hanterar effekten av de intermittenta energislagen sol- och vindenergi, vilket …
Eight AC UHV projects and 11 DC UHV projects have been built in China, which play an important role in the optimal allocation of energy. Plus there are one more UHVAC and …
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Ultrahigh-voltage (UHV) and offshore substations are fast-becoming mature applications, but there is a big difference between substation technologies. UHV technology …
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It spearheaded an era that would see the country build a vast network of UHV infrastructure, dubbed the "bullet trains for power", to send electricity generated from hydro and …
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Cross-regional UHV construction projects fall into two main categories: direct current DC UHV and alternating current AC UHV projects. DC UHV projects are primarily point-to-point terminal projects, while AC UHV …
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Die Strömung im UHV ist molekular, die mittlere freie Weglänge beträgt mehr als 1 km. Wenn der Druck weiter bis 10-12 mbar sinkt, wächst die freie Weglänge auf 10.000 km. Die restlichen in …