Electricity: power supply or regulation systems – For reactive power control – Using impedance
Patent
1993-05-17
1996-02-06
Sterrett, Jeffrey L.
Electricity: power supply or regulation systems
For reactive power control
Using impedance
323209, G05F 170
Patent
active
054898382
ABSTRACT:
A method and apparatus is described for generating a synchronizing signal for a firing-circuit subassembly to trigger a power converter valve of a controlled series compensator. According to the invention, a sinusoidal substitute variable is provided, which can be either a measured line current or the sum of a capacitor current and a valve current, such that the zero crossings of said substitute variable do not vary. This substitute variable is modified in terms of its phase position so that a synchronizing signal that corresponds to the phase position of the capacitor voltage of the series capacitor of the controlled series compensator is made available to the firing-circuit subassembly. The result, even in the bypassed state, is a sinusoidal synchronizing signal whose zero crossings do not vary, so that operating stability problems no longer occur in the transient state during operation close to resonance.
REFERENCES:
patent: 4292545 (1981-09-01), Hingorani
patent: 4859884 (1989-08-01), Yoshino
patent: 4999565 (1991-03-01), Nilsson
patent: 5032738 (1991-07-01), Vithayathil
patent: 5134356 (1992-07-01), El-Sharkawi et al.
patent: 5198746 (1993-03-01), Gyugi et al.
patent: 5202583 (1993-04-01), Larsen et al.
patent: 5227713 (1993-07-01), Bowler et al.
patent: 5291120 (1994-03-01), Leowald et al.
patent: 5367197 (1994-11-01), Klerfors
patent: 5374853 (1994-12-01), Larsen et al.
patent: 5424627 (1995-06-01), Clark et al.
IEEE Transactions on Power Delivery, vol. 7, No. 2 Apr. 1992, New York, US, pp. 914-919; Boon-Teck OOI et al.: Solid-State Series Capacitive Reactance Compensators.
Siemens Forsch. U. Entwicklungsbericht, vol. 6 (Jun. 1977) No. 1, pp. 29-38, W. Meusel and H. Waldmann: Coordinate Transformations of Multi-Term Regulation Systems for the Compensation and Symmetrization of Three-Phase Supplies.
IEE Meeting, London, UK, N. Christl et al.: Power System Studies and Modelling for the Kayenta 23;0 KV Substation Advanced Series Compensation, pp. 33-37, Dec. 1991.
Cigre Tagung, Summer 1992, N. Christl et al.: Advanced Series Compensation (ASC) with Thyristor Controlled Impedance, pp. 1-10, Sep. 1992.
EPRI Workshop, Nov. 14-16, Dec. 1990, Cincinnnati, Ohio, Siemens, Munich, Germany: Advanced Series Compensation with Variable Impedance, 13 pages.
Leowald Karl-Friedrich
Weiss Stephan
Siemens Aktiengesellschaft
Sterrett Jeffrey L.
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