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US20080278121 |
Electrical Energy Transmission Device
An electrical energy transmission device has phase conductors, which carry alternating current and have transfer impedance, and sheathed conductors, which are inductively coupled to the phase...
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US20080265848 |
Electric Power Flow Control
An apparatus for controlling a power flow in a high voltage network. A phase shifting transformer includes a tap changer.
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US20080252269 |
Actuating circuit
Disclosed is an actuating circuit and method for actuating a switch regulating the power consumption in a power factor correction circuit having input terminals for applying an input voltage and...
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US20080239607 |
OVERLOAD PROTECTION DELAY CIRCUIT FOR SWITCHING POWER SUPPLY
Disclosed is an overload protection delay circuit for use in a switching power supply for enabling the switching power supply to detect overload problems with high accuracy. The overload protection...
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US20080238374 |
SAMPLING METHOD WITH ADJUSTING DUTY RATIOS
A sampling method with adjusting duty ratios is provided and includes the following steps. A first working pulse signal which has a pulse-width duty ratio D in a switching period T s is provided....
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US20080157728 |
Reactive-power control apparatus and reactive-power compensator using the same
In a conventional reactive-power compensator using a static reactive-power compensator (SVC), there are many cases in which the SVC is operating in a state in which it generates an amount of...
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US20080150496 |
Reactive power control apparatus for AC power system
A reactive power control apparatus for an AC power system includes a reactive power compensation device, a compensation capacitor device and a compensation capacitor control device. The...
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US20080001581 |
Control System for Static VAR Compensator
In a control system for a static var compensator that performs phase control of a current of a reactor for each phase by a thyristor and thus controls reactive power, a detecting unit that detects...
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