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US 6,552,598 B2Granted
Semiconductor high voltage electrical energy transmission switching system and method
OwnerVitaly Gelmaninventor
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OwnerVitaly Gelmaninventor
Estimating the term…
A method for controlling fault interruption in a high voltage electrical energy transmission system semiconductor high voltage electrical energy transmission switching system which includes a multiple stack of power semiconductor SCR thyristor circuit sections arranged for single phase or three-phase operation with each section of the stack comprising; a pair of input and output terminals, a plurality of switching thyristors connected in series between the input and output terminals, an auxiliary power transformer having at least three windings with first and second windings interconnecting the input and output terminals of one section to the respective output and input terminals in each adjacent section of the stack such that the voltage difference between the first and second transformer windings is limited to the maximum voltage across the section. The system also includes an AC/DC power supply connected to the third winding of the auxiliary power transformer and a gate drive circuit for controlling the firing of the switching thyristors in said section comprising the steps of connecting in tandem a multiple stack of power semiconductor SCR thyristor circuit switching sections. The a gate drive circuit is connected to the gate terminals of the commutation SCR thyristor's for controlling the firing of the commutation SCR thyristor's in each section and the firing angle of the SCR thyristor's in each section is changed between 0° and 180° to allow for downstream protection coordination.
A semiconductor high voltage electrical energy transmission switching system including a multiple stack of free floating power semiconductor thyristor circuit sections having separate input and output terminals respectively with each of said circuit sections being isolated from ground potential and arranged in tandem with the output terminals of one circuit section connected to the input terminals of an adjacent circuit section for distributing auxiliary electrical power sequentially through each of said circuit sections, with each section in the stack comprising:
A method for controlling fault interruption in a high voltage electrical energy transmission AC network system including a multiple stack of free floating circuit sections isolated from ground potential with each circuit section including a plurality of semiconductor switching devices having a gate terminal, gating means connected to each gate terminal for firing the semiconductor switching devices in a controlled manner after a fault interruption occurs and a power supply, comprising the steps of arranging the multiple stack of free floating circuit sections in tandem with the output terminals of one circuit section connected to the input terminals of an adjacent circuit section for transferring auxiliary electrical power from the power supply through each circuit section sequentially, connecting the switching devices of each circuit section in series between the input and output terminals thereof and firing each semiconductor switching device by adjusting the firing angle of each such switching device in each circuit section between 0° and 180° so as to regulate the flow of current through each of the semiconductor switching devices to provide for downstream protection to the other circuit sections following the fault interruption.
Dependencies are inferred from the claim text.