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Grid-connected inverter is an important part of the grid-connected system. Compared with the traditional L or LC filter, LCL filter has a better high-frequency harmonic attenuation performance. However, LCL filter has resonant peak, which has a great influence on the stability of the system. This paper first analyzes the effect of passive damping method on the resonance peak; then a double closed-loop...
Power switch devices which base on wide band-gap (WBG) semiconductor, such as silicon carbide metal-oxide-semiconductor-field-effect-transistor (SiC MOSFET) and gallium nitride high-electron-mobility transistor (GaN-HEMT) perform superior performance as compared with silicon (Si) MOSFET in high switching frequency, high blocking voltage, and high temperature operation. In this paper, a series of characteristic...
Magnetic components are very important part in the power electronics system. Given weight and constrain space in the power converter, high power density converter is increasely required. In the whole system, half of the weight are the magnetic components. For the grid-connected system, the LCL filter is a necessary part to suppress the noise due to the high switching frequency transistor appeared...
This study proposes a novel dynamic reliability network-equivalent approach (RNEA) for distribution generations (DGs) enhanced distribution system. This method includes a bottom-up process and a top-down process, which are developed based on equivalent principle, and the synthesis of both processes yields the reliability performance of any node in the system. In addition, a novel switch zone concept...
The harmonics and electromagnetic interference (EMI) generated by grid-connected power converter have to be well filtered by a passive filter to achieve electromagnetic compatibility (EMC). This paper evaluates the performance of two different winding methods of a LCL filter in a grid-connected high power density converter (HPDC) for the purpose of power quality control and EMI suppression. The foil-would...
Power quality and electromagnetic interference (EMI) control are mandatory for any grid-connected power converter. This paper describes a procedure for LCL filter design in a grid-connected high power density converter (HPDC) with the objective to meet both power quality and EMI requirements. The performance of the LCL filter is simulated and then validated experimentally.
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