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This paper presents Direct Power Control (DPC) based on instantaneous power theory is presented. The simulation of a grid connected five level inverter via an inductive filter with a new direct power strategy is used. However, this control method is similar to the classic DPC method, in which used triangles instead of the sectors. Furthermore, the regulation of DC link without interfering the hysteresis...
The paper presents a detailed description of the prediction model for Predictive Power Control based on Virtual Flux (MPPC-VF) scheme for control grid connected three-level neutral-point clamped inverter (3L-NPC). The controller uses a model to calculate predictions of the future values of the virtual flux, grid currents and DC-link capacitor voltages for all possible voltage vectors. The active and...
To make the Quasi-Z-source inverter applied in photovoltaic systems better, a flexible grid-connection method based on direct power control is proposed. The proposed method adopted grid power to control APF directly, thus the detection of harmonics and reactive current of loads is omitted. Moreover, space vector modulation (SVM) is adopted to keep switching frequency constant and improve dynamic performance...
In this work, we present an experimental study of PV grid-connected system installed in the Faculty of Sciences of Tunisia. This system is composed by a PV generator, a buck-boost DC-DC converter, a voltage inverter and a grid utility. Two control lows are developed in this work. The first is the sliding mode control applied to the dc-dc converter in order to insure the required reference DC voltage...
To maximize the power flow in a transmission grid while maintaining stability, unnatural power flows can be enforced by a Unified Power Flow Controller. Theoretically the control of active and reactive power flow can be without overshoot or cross coupling. Direct power control, based on instantaneous power theory, can apply the full potential of the power converter and achieve better results. Simulation...
VSC-HVDC system based on voltage source converter connecting large-scale offshore wind farm is illustrated in the paper. To improve the transmission capacity and solve power quality problem, multilevel inverter is used in VSC-HVDC system. The simulation system is built on the basis of power control algorithm, implementing the independent control on bilateral sides. On wind turbine side, three are...
This paper describes a novel control strategy of a direct-power-control based indirect matrix converter. The key of this strategy is direct selection of a switching state of the indirect matrix converter on the basis of instantaneous power errors. A relationship between the instantaneous power and the switching state of the indirect matrix converter is theoretically analyzed, which is essential to...
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