Equipment and method for exchanging power, in shunt...

Electrical transmission or interconnection systems – Combined impedance and switch systems

Reexamination Certificate

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C323S205000

Reexamination Certificate

active

10501076

ABSTRACT:
Equipment for exchanging power, in shunt connection, with an electric power network. A reactive impedance element and a voltage source converter provide mutual connection in series. The power network has a nominal voltage of a fundamental frequency and a given phase position. The converter is intended for generating a fundamental-tone voltage within a control range which limits the amplitude of the fundamental-tone voltage. The control range limits the amplitude of the fundamental-tone voltage to a value that is lower than the nominal voltage of the power network and comprises generation of a reactive component of the fundamental-tone voltage with a phase position that either coincides with the phase position for the voltage of the power network, or that deviates by 180° electrically form the phase position for the voltage of the power network.

REFERENCES:
patent: 6411067 (2002-06-01), Bjorklund
patent: 2004/0052015 (2004-03-01), Angquist et al.
patent: 2302498 (1999-03-01), None
patent: 197 38 125 (1999-03-01), None
patent: WO 97/49157 (1997-12-01), None
Bijlenga, Bo et al., “SVC Light—a powerful tool for power quality improvement”, ABB Review, Jun. 1998, pp. 21-30.
Ashari, M. et al., “Mitigation of Line and Neutral Harmonics in Three-Phase Distribution Systems”, Pub-Conference Record of the 2000 IEEE Industry Applications Conference, vol. 5, Oct. 8-12, 2000, pp. 3166-3171.

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