This paper describes the typical field of power electronic converter in the branch of traction substation. The main attention is paid to problematic of ACtraction substation. This topic is solved here due to the just started conversion from DC-traction system to ACtraction system in Czech Republic. These new ACtraction substations use semiconductor power converters for purpose to minimize un-symmetrical unbalance of input current consumption, to compensate reactive power, to filtrate high-order harmonics etc. This article describe and compare basic attributes of these modern topologies of AC-traction substation.
This paper introduces the advanced synchronization method second order general integrator phase locked loop modified especially for voltage synchronization exclusively for traction active rectifier. Designed synchronization is characterized by resistance to interfaces and especially quick response to frequency fluctuations. The behavior of designed synchronization method was analyzed by simulations tests and the final synchronization adjustment was suggested.
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