Development and performance testing of a 200 kVA damperless superconducting generator

Journal Article · Mon Dec 01 04:00:00 EST 1997 · IEEE Transactions on Energy Conversion

DOI:https://doi.org/10.1109/60.638869· OSTI ID:603824

Suryanarayana, T; Bhattacharya, J L; Raju, K S.N.; Durga Prasad, K A ^[1]

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1. Bharat Heavy Electricals Ltd., Hyderabad (India). Corporate R and D Div.

A 200 kVA, 3,000 RPM superconducting generator has been developed and tested. The rotor has been wound with superconducting wire of Nb-Ti alloy. A closed-circuit liquid helium system has been designed and installed for cooling the superconducting windings. The stator carries the air-gap type armature windings and a laminated-iron flux-shield. A new concept in the design of superconducting generators with high short-circuit ratio (more than 5) has been introduced. This eliminates the requirement of Electro-magnetic Damper (EMD) and Quick Response Excitation System (QRES). The generator has been comprehensively tested in superconducting state. Open-circuit and sustained short-circuit tests, 3-phase sudden short-circuit test, synchronization with grid and parallel operation with power system have been conducted. The synchronous machine was operated up to its rated kVA in the four quadrants--as generator and as condenser with leading and lagging power factors. A few special tests on superconducting generator, which were not reported earlier, such as direct-on-line starting of a 20 HP squirrel-cage induction motor and negative phase sequence tests have also been performed successfully. Test results and conclusions are given in the paper.

• OSTI ID: 603824
• Journal Information: IEEE Transactions on Energy Conversion, Journal Name: IEEE Transactions on Energy Conversion Journal Issue: 4 Vol. 12; ISSN 0885-8969; ISSN ITCNE4
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CRYOGENIC FLUIDS
DESIGN
HELIUM
NIOBIUM ALLOYS
PERFORMANCE TESTING
SUPERCONDUCTING GENERATORS
TITANIUM ALLOYS