Abstract
In a DC distribution system configured by AC/DC power conversion system (PCS), the voltage control performance of the AC/DC PCS determines the stability and reliability of the DC distribution grid. The DC voltage of grid is maintained by capacitor, thus transient voltage is an inevitable problem when a grid is connected with a high amount of load or renewable energy. Space vector pulse width modulation (SVPWM) is well known as a stable modulation method and is used in AC/DC PCS and many types of topologies, but a solution for the transient states issue of DC link has not clearly been studied. In this paper, a feedforward compensation method based on the mathematical model of SVPWM is proposed to solve the transient state problem in a DC distribution system. The proposed method is verified by simulation and experiment. AC/DC PCS with the proposed feedforward compensation method has more robust DC voltage control characteristics.
Highlights
As the fields of power semiconductor technology and power converter technology have advanced and interest in environmental pollution has increased, a distributed power source utilizing new and renewable energy has been attracting attention, and DC distribution has been actively studied for this purpose
A robust DC voltage control characteristic of AC/DC power conversion system (PCS) is required to supply power to tothe thesensitive sensitive load that is connected to the DC distribution in a stable load that is connected to the DC distribution in a stable manner
The themost mostreliable reliable way way to to increase increase the of of distribution is to improve the performance of and feedforward compensated to the output distribution is to improve the performance of AC/DC PCS and feedforward compensated to the through valuethe that wasthat obtained throughthrough modeling of the AC/DC
Summary
As the fields of power semiconductor technology and power converter technology have advanced and interest in environmental pollution has increased, a distributed power source utilizing new and renewable energy has been attracting attention, and DC distribution has been actively studied for this purpose. A robust DC voltage control characteristic of AC/DC PCS is required to supply power dips [17,18,19,20,21]. A robust DC voltage control characteristic of AC/DC PCS is required to supply power to tothe thesensitive sensitive load (to voltage fluctuation) that is connected to the DC distribution in a stable load (to voltage fluctuation) that is connected to the DC distribution in a stable manner. A control method for stabilization of the DC link voltage is studied in in when voltage dips occur on the side voltage.
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