Electricity: power supply or regulation systems – For reactive power control – Using converter
Patent
1996-07-26
1998-08-25
Wong, Peter S.
Electricity: power supply or regulation systems
For reactive power control
Using converter
363 98, 307 87, G05F 170, H02M 324, H02J 100
Patent
active
057986339
ABSTRACT:
A method and apparatus for controlling a battery energy storage system of the type in which an inverter is coupled to convert direct current power from a DC source to a controlled frequency AC power suitable for supplementing utility power or for replacing utility power includes a control mechanism for operating the system and either a supplemental or replacement mode in parallel with a utility power system. The system favors frequency control over power control and maintains constant monitoring of frequency output with adjustment of power in response to any frequency shift of the inverter output. The system also includes apparatus for determining a power error signal based upon commanded power output in which the power error signal is applied as a phase shift control signal in the frequency control circuit for regulating the real component of power supplied by the inverter. In one form, the system is illustrated as multiple, parallel connected power control systems coupled to a common DC source for supplying a common AC output and each of the power control systems are regulated in response to the reactive component of power supplied therefrom so as to promote load sharing between the separate power control systems.
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Delmerico Robert W.
Larsen Einar V.
General Electric Company
Mora Enrique J.
Patel Rajnikant B.
Wong Peter S.
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