Design and Test of High-Low Voltage Excitation System for HTS Synchronous Condenser

Temperature superconducting (HTS) synchronous condenser is a reactive power compensation device with the advantages of low loss, high efficiency and wide reactive power range. Therefore, it has a very good application prospect in power grid. To solve the problems of low power factor and low conduction angle of constant excitation function for a long time due to single power supply excitation system, this paper proposes a high-low voltage switching excitation system, which separates the forced excitation and constant excitation modes of the excitation system into two power supplies. Based on the introduction of principle of excitation system, the design of its parameters and simulation analysis are completed, and a set of 400kW device is designed. On this basis, a series of corresponding superconducting experiment are carried out. The experimental results verify the principle of the power supply topology, and also show the feasibility and reliability of the proposed excitation system.