Electrical transmission or interconnection systems – Plural supply circuits or sources
Patent
1986-12-05
1988-03-01
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural supply circuits or sources
307 46, 307 66, 307 87, 322 25, 322 28, H02J 300
Patent
active
047288060
ABSTRACT:
A parallel power system includes at least two DC link variable speed constant frequency power sources each having a plurality of output phases connected to a common bus. The total real error current flowing in the output phases of each of the power sources is monitored and the relative phase angle of the Thevenin voltage of the power sources is controlled in response to the monitored total real error current to reduce the magnitude of this real error current. The reactive error current flowing in at least one of the output phases of each of the power sources is monitored and the relative magnitude of the Thevenin voltage of the power sources is controlled in response to the monitored reactive error current to reduce the magnitude of the reactive error current. For operation at no load, the phase angle control loop is sensitive to both real and reactive error currents.
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Baker Donal E.
Beg Mirza A.
Ip Paul
Lenart R. P.
Shoop Jr. William M.
Westinghouse Electric Corp.
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