H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/96
H02M 7/00 (2006.01) H02J 3/18 (2006.01) H02M 7/757 (2006.01)
Patent
CA 1106444
METHOD AND APPARATUS FOR CONTROLLING THE ALTERNATING VOLTAGE OF A STATIC CONVERTOR Abstract of the Disclosure An improved reactive power control for a static convertor wherein the improved control compensates for voltage transients caused by the connection and dis- connection of reactance elements in an AC convertor network by making corresponding transient adjustments in a normal control angle of the convertor. A maximum angular increment in the direction of 90° is applied to the normal control angle when the AC reactance switching occurs. If a capacitive reactance element is connected to the AC network, the maximum angular increment is rapidly built up after the connection and is thereafter gradually reduced. If the capacitive reactive element is disconnected from the AC network, the maximum angular increment is gradually built-up prior to the disconnection and after the disconnection the maximum angular increment is rapidly reduced. The sequence of incremental control angle build- up and reduction is reversed if the reactance element is a reactor.
299698
Asea Aktiebolag
Robic Robic & Associes/associates
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