초록 ▼

A frequency domain self-synchronization controller for solid state switches is disclosed. The controller analyzes a measured power signal in the frequency domain to identify a frequency domain firing angle and then converts the frequency domain firing angle to a time-domain firing signal command. Th

A frequency domain self-synchronization controller for solid state switches is disclosed. The controller analyzes a measured power signal in the frequency domain to identify a frequency domain firing angle and then converts the frequency domain firing angle to a time-domain firing signal command. The time-domain firing signal command is used to fire selected solid state switches of, for example, a static VAR compensator, precisely when the voltage across the selected solid state switches is at or near zero volts, so that the solid state switches are not damaged. The controller also calculates the line voltage level of the power system and in response to the voltage level it automatically executes either a high voltage coarse line conditioning strategy, a high voltage fine line conditioning strategy, a low voltage coarse line conditioning strategy, or a low voltage fine line conditioning strategy. Each of the line conditioning strategies is used to rapidly accomplish voltage control of the power signal on a cycle-by-cycle basis.

대표청구항 ▼

A circuit for firing solid state devices, comprising: a power line output node for connection to a power line carrying a power signal; a parameter measurement circuit to continuously sample said power signal and obtain a measured power signal; a power compensation element; a plurality of solid state

A circuit for firing solid state devices, comprising: a power line output node for connection to a power line carrying a power signal; a parameter measurement circuit to continuously sample said power signal and obtain a measured power signal; a power compensation element; a plurality of solid state devices connected between said power compensation element and said power line output node; and a self-synchronizing controller connected to said parameter measurement circuit and said plurality of solid state devices to analyze said measured power signal in the frequency domain to identify a frequency domain firing angle and to convert said frequency domain firing angle to a time-domain firing signal command that is applied to said solid state devices to provide selected power conditioning to said power signal.