Arrangement for power supply for a reactor for production of polysilicon with a frequency converter

An arrangement comprising:

• a first power supply arrangement (VSC), wherein the first power supply arrangement (VSC) comprises at least one single-phase transformer (4), a three-phase transformer (4′) or an n-phase transformer having at least three taps (421, 422, 423, 434) for each secondary winding (42), wherein another tap (424) of each secondary winding (42) is connected to a secondary-side neutral conductor and the at least three taps (421, 422, 423) of each secondary winding (42) are each connected via a corresponding power controller (5) with a secondary-side phase conductor, wherein each secondary-side phase conductor is connected to a phase terminal (L1′″, L2′″, L3′″) and the neutral conductor is connected to at least one neutral conductor terminal (N′″), wherein each phase conductor terminal (L1′″, L2′″, L3′″) in conjunction with one of the neutral conductor terminals (N′″) forms an output of the first power supply arrangement (VSC), and
• between one and n second power supply arrangements (MF)
• wherein
• the n second power supply arrangement (MF) is configured, comprising:
• a transformerless conversion circuit having at least one input for receiving an input current from a supply grid with which the at least one input is connectable, and outputs connectable to at least one load (3) supplied with an output current;
• the conversion circuit converting the input current into an n-phase AC current, wherein a phase shift between chained voltages of an n-phase AC current system formed on an output side of the conversion circuit is 360°/n, wherein n is a natural number greater than or equal to two,
• the power supply arrangement has n outputs,
• the outputs of the power supply arrangement form a chain, and one of the chained voltages of the n-phase AC current system is applied on each output,
• and
• wherein each output of the first power supply arrangement (VSC) is connected in parallel with the chain or with one of the chains formed from the outputs of the second or one of the second power supply arrangements (MF).