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Analysis on Electromagnetic Transient Characteristics of UHV Half-wavelength AC Transmission System
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2011
Year
Electrical EngineeringGeographical PositionsEngineeringSmart GridEnergy ManagementEnergy EfficiencyElectrical TransmissionUhvac Transmission LineTransmission LineElectric Power TransmissionElectromagnetic Transient CharacteristicsTransmission SystemPower ElectronicsPower System ProtectionElectric Power DistributionPower System TransientElectric PowerElectromagnetic Compatibility
The geographical positions of main energy resources in China are far from load centers,and the distances between energy resources and load centers are close to half-wavelength of power frequencey.UHV half-wavelength AC power transmission can be regarded as one of the selectable schemes to send large capacity of electric power via long distance.Based on parameters of UHVAC transmission line in China and refering to the UHVAC transmission system being planned,a model to research UHV half-wavelength AC power transmission is built and by which such problems in half-wavelength power transmission as power frequency overvoltage,switching overvoltage,overvotlage caused by grounding faults and seconday arc current are simulated and researched.Based on the results from simulation and research,several measures to suppress these kinds of overvoltages and seconday arc current are proposed.