Abstract: An artificial intelligence reactive power control system for low voltage ride-through in a grid connected distributed generation network includes a grid, a circuit breaker, a distributed generation circuit including 3-phase terminals, and a voltage and current measurement unit connected to the 3-phase terminals and configured to generate a set of measured variables. An intelligent low voltage ride-through detector receives the set of measured variables and identifies a low voltage ride-through status of the utility grid. An intelligent reactive power controller receives a low voltage ride-through status signal from the intelligent low voltage ride-through detector and controls a low voltage ride-through during a grid voltage sag and a voltage reduction by transmitting one or more of an active power reference and a reactive power reference value to the distributed generation circuit based on the low voltage ride-through status signal.

Abstract: An apparatus for powering a lamp connected to a ballast circuit. A DC bus provides a DC voltage signal to an inverter. A control circuit selectively energizes the inverter to generate an AC signal for powering the lamp load via the rectifier circuit and an inverter circuit. A detection circuit connected between the lamp and inverter generates a detection signal indicating whether an arc condition is present in the circuit. The detection circuit also senses the magnitude of the detection signal and generates a command signal to provide to the control circuit to inhibit power from being supplied to the lamp during an arc condition. A switching circuit is coupled between the output of the detection circuit and circuit ground and responsive to an ignition signal from the control circuit to direct the detection signal to ground during an ignition period.

Abstract: An apparatus for powering a lamp connected to a ballast circuit. A DC bus provides a DC voltage signal to an inverter. A control circuit selectively energizes the inverter to generate an AC signal for powering the lamp load via the rectifier circuit and an inverter circuit. A detection circuit connected between the lamp and inverter generates a detection signal indicating whether an arc condition is present in the circuit. The detection circuit also senses the magnitude of the detection signal and generates a command signal to provide to the control circuit to inhibit power from being supplied to the lamp during an arc condition. A switching circuit is coupled between the output of the detection circuit and circuit ground and responsive to an ignition signal from the control circuit to direct the detection signal to ground during an ignition period.