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This paper presents a method for the performance improvement of a shunt active power filter (SAPF) using the indirect current control (ICC) scheme. Compared to the conventional direct current control (DCC) scheme, the ICC gives better performance with a lower number of sensors. A simplified and efficient control algorithm using a low cost Intel 80C196KC microcontroller is implemented using only two current sensors for the source current and one voltage sensor for the DC-link voltage of the SAPF circuit. The objective is to eliminate harmonics and to compensate the reactive power produced by non-linear loads such as an uncontrolled rectifier feeding an inductive load. The APF is realized using a three phase voltage source inverter (VSI) with a dc bus capacitor. Experimental results are presented to prove the better performance of the ICC method over the DCC one.

The proposed PV system consists of four subsystems; the PV array subsystem, the power conditioning subsystem, the control subsystem, and the DC load subsystem. Experimental realization of the proposed system is carried out. The control of the switching duty cycle of the used DC–DC converter is achieved through the 180° algorithm, where a conventional PI controller is used to provide the implemented system with the suitable control action. Experimental results are found to satisfactorily track the MPP of the PV array. Copyright © 1999 John Wiley & Sons, Ltd.

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In this paper, a complete quasi-Z-source inverter based for wind power generation system is modelled and analysed. The overall system is introduced in two main configurations, one is open loop and the other is closed loop. The open loop system is designed in such away to extract the maximum wind energy from the open loop configuration using the modified Space Vector Pulse Width Modulation based on the maximum constant boost of the quasi Z source inverter. The closed loop system is used to control the dc link voltage. Results extracted from both cases are described, analyzed and compared. A 600 watt Permanent Magnet synchronous generator is used to generate the output power from the wind turbine. A complete MATLAB simulation for the analysis and design is introduced. A hardware setup of the wind turbine emulator coupled with the Permanent Magnet synchronous generator based on the Z-source inverter and controlled by the DSP TMS320F28335 is under construction for the hardware verification.

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