STATE GRID CORPORATION OF CHINA;STATE GRID SMART GRID RESEARCH INSTITUTE;STATE GRID LIAONING ELECTRIC POWER COMPANY LTD.;STATE GRID LIAONING ECONOMIC TECHNIQUE INSTITUTE
Provided is a power transmission system for improving the transmission capacity of an urban power grid through non-sine alternating current power transmission. The system comprises a first waveform conversion system and a third waveform conversion system both for converting a sine wave into an alternating square wave, and a second waveform conversion system and a fourth waveform conversion system both for converting the alternating square wave into the sine wave; the first waveform conversion system is connected with the second waveform conversion system through a first polar wire and a second polar wire, and the first polar wire is arranged parallelly to the second polar wire; the third waveform conversion system is connected with the fourth waveform conversion system through a third polar wire. Through the use of the capability of bidirectional current conduction of voltage source converters and with the help of switching devices, the power transmission system provided in the present invention well solves t
