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To guarantee a smooth transition from islanding mode to grid-connected mode, synchronization is the first issue to be considered. This paper puts forward a new synchronizing strategy based on voltage-controlled inverter. It can easily and accurately make the voltage frequency and phase of the distributed generation system track the main grid even if it varies. At the same time, there is a very small...
Voltage-controlled inverters are grid-friendly and can cope with the high penetration caused by connecting a lot of distributed generations. In low voltage power systems This paper proposes a simple and precise PQ control strategy based on improved voltage-controlled inverters with inner output impedance. The PLL part is replaced by second order generalized integrator method and it performs well when...
In this paper, a new constant on-time control with output capacitor equivalent series resistance (ESR) ripple compensation and offset cancellation for buck converter is presented. The proposed controller uses lossless capacitor current sensing circuit and an offset-cancellation circuit, which not only improves system stability, but also eliminates the output dc offset.
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