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In this paper, an improved control strategy for three-phase inverter is proposed, which ensures three-phase output voltage symmetry under unbalanced grid voltage. Firstly, the positive and negative sequence separation module is used to obtain unbalance output voltage and current during the grid faults. By calculating output power of the inverter, an improved P-ƒ, Q-U and Q-G droop control strategy...
A LED control system is presented. The brightness and color temperature of the lamp are adjustable. The system composition and design of hardware and software are given. The infrared signal is sent by an infrared remote controller. A STC-MCU is used to process the infrared information and generate PWM signals which can adjust the brightness of the white LED and yellow LED respectively. It proves that...
We present an averaging approach for investigation of input-to-state stability (ISS) for a class of hybrid systems. Two recently proposed definitions of averages (strong and weak averages) for time varying systems with disturbances are adapted to a class of hybrid systems. Assuming that the average systems is forward complete, we show an appropriate closeness of solutions on compact time intervals...
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