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In this paper, a cost-effective finite-time settling current control system for a utility-interactive three-phase voltage source inverter system with an inductor–capacitor–inductor (LCL)-type filter is originally designed and developed. The discrete-time system equation of the LCL-type filter is first simply derived in the $\alpha{-}\beta$ stationary reference frame. Then, the finite time of a three-sampling-period...
This paper proposes analytical expressions of a deadbeat control system for the output LCL filter in a grid-connected inverter with a settling time of three sampling periods. Unlike the conventional analysis, the proposed control algorithm is derived in the descritised time-domain instead of the s-domain. Furthermore, not only integrated active power but also reactive power can be controlled independently...
In this paper, an effective deadbeat current control scheme for a third-order inductor-capacitor-inductor(LCL) filter in voltage source inverter applications of wind energy is developed. The novel scheme is not only used to damp the LCL resonance but also to achieve time-optimal responses of the grid-side currents. Based on the theoretical analysis of the LCL-filter with the deadbeat current control...
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