Abstract

The superconducting magnetic energy storage (SMES) system would be a valuable system for power line stabilization. It would increase stability by supporting peak energy and compensating generation shortage. With the development of a large-capacity GTO thyristor suitable for 20-MW-level power conversion systems, it is possible to control the four-quadrant real power (P) and the reactive power (Q) condition by self-commutated power converters with high performance. This paper describes a new direct-connected multiple current-source converter, and also explains suitable control strategies for the pilot plant of an SMES system. The feasibility of the control strategies is demonstrated by EMTP simulation results. © 2000 Scripta Technica, Electr Eng Jpn, 133(1): 87–96, 2000

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