A b s t r a c t -This paper presents results of laboratory tests of a power conversion system (PCS) f o r superconducting magnetic energy storage (SMES). The PCS uses a two-quadrant chopper and a v o l t a g e source converter. Operating modes of the c h o p p e r are discussed. Operation of the SMES to p r o v i d e independent control of real and reactive p o w e r , operation as a static var compensator, low frequency modulation of the real power, and speed of r e s p o n s e are demonstrated. A circuit is presented for testing a SMES PCS that does not require a superconducting c o i l .

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