High power inverter pole employing series connected devices conf

Details High power inverter pole employing series connected devices conf High power inverter pole employing series connected devices conf

1997-03-20

1998-08-25

Wong, Peter S.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 57, 363 96, 363138, H02H 7122, H02M 324, H02M 7515, H02M 106

Patent

active

057989168

ABSTRACT:
A high power inverter pole for a voltage sourced inverter suitable for providing compensation in electric power transmission and distribution systems, has a positive switching valve and a negative switching valve connected between closely spaced dc-source terminal, respectively, and a common ac terminal to form a current loop with minimum loop area thereby reducing stray loop inductance and limiting the overshoot voltage on serially connected electronic switches which make up the valves. In a preferred embodiment, the valves are mounted on opposite sides of the web of an insulative I-beam. The electronic switches are incorporated in modular switching units connected in series by C-channel connecting conductors having flanges bolted to the I-beam flanges. The modular units include broad, flat conductors bolted through end flanges to the C-channel connecting conductors. The electronic switches and anti-parallel diodes of the modular units are clamped between these broad, flat conductors. Cooling water is circulated through the broad, flat conductors which serve as heat sinks as well as providing low inductance electrical connections. In another embodiment of the invention, sections of the positive and negative switching valves are folded back on themselves to minimize loop area and hence again, reduce stray loop inductance.

REFERENCES:
patent: 4908734 (1990-03-01), Fujioka
patent: 5321598 (1994-06-01), Moran
patent: 5337227 (1994-08-01), Stacey et al.
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patent: 5373418 (1994-12-01), Hayasi
patent: 5497289 (1996-03-01), Susgishima et al.
patent: 5544035 (1996-08-01), Beriger et al.
patent: 5576944 (1996-11-01), Uchino

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