Study on main magnetic field of ultra-high voltage magnetically controlled saturated reactor

Reactive power compensation using controlled reactor in Ultra-High Voltage Transmission Lines not only can smoothly regulate system reactive power and realize flexible power transmission, but also can restrain power frequency operating over-voltage, reduce line losses, and improve system stability and safety greatly. According to the principle of controlled reactor, the controlled reactor works under the interaction of alternating current and direct current, so the calculation of main magnetic field is extremely complicated. Now, we don´t know the distribution of main magnetic field under different conditions very well. So the article greatly researches and simulates the distribution of main magnetic field. The article provides the control characteristic curve, which can describe the continuous and smooth regulation scheme of the controlled reactor. We can know the Ultra-High Voltage Magnetically Controlled Saturated Reactor meet the design requirements and verify the rationality of the design by the study on the control characteristic curve and the distribution of main magnetic field. So we can make a prototype for further study.