Electricity: power supply or regulation systems – For reactive power control – Using impedance
Patent
1990-02-20
1991-10-01
Beha, Jr., William H.
Electricity: power supply or regulation systems
For reactive power control
Using impedance
323210, G05F 170
Patent
active
050536915
ABSTRACT:
When there are variations in the short-circuit power of a system, the operating conditions can change, particularly in a controller of a compensating device. To automatically adapt the controller and to avoid or suppress oscillations or voltage variations in the system, a method is provided according to a first solution, where the circuit state of a compensating element is modified for testing purposes. The reaction of the system is detected in a device and, then a parameter which determines the damping of the controller is modified by means of a computing device. According to a second solution, an oscillation of the controller is established by detecting a signal which is dependent on the system voltage and by comparing specific variations. To suppress the oscillations, the hysteresis of the controller is damped by means of the computing device.
REFERENCES:
patent: 4104576 (1978-08-01), Frank
patent: 4199804 (1980-04-01), Juhlin
patent: 4353024 (1982-10-01), Gyugyi
patent: 4680531 (1987-07-01), Rey et al.
patent: 4769587 (1988-09-01), Pettigrew
Henner Vladimir E.
Leowald Karl-Friedrich
Wild Georg
Beha Jr. William H.
Siemens Aktiengesellschaft
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