The application of the average current mode control (ACMC) to a new type of very efficient post-regulators is studied in this paper. This post-regulator, called series-switching post-regulator (SSR), has recently been proposed to improve the dynamic response series-switching of power factor correctors (PFC). The post-regulator exhibits very high efficiency due to the fact that only a part of th...

The doubly-fed generators (DFIG) have clear superiority for the applications of large capacity and limited-range speed control case due to the partially rated inverter, lower cost and high reliability. These characteristics enable the doubly-fed wound rotor induction machine to have vast applications in wind-driven generation.In this paper Combined Vector and direct power control (CVDPC) strate...

Thyristor based controlled method in AC voltage regulator has very low dynamic response and discharge large amount of harmonic components. And a PWM Controlled Buck-Boost AC Voltage Regulator can efficiently and economically used in low and medium power applications in the advantage of design simplicity with operation reliability in a clear withstand of naturally commutated schemes. It has very...

renewable energy sources like wind, sun, and hydro are considered as a reliable alternative to the traditional energy sources such as oil, natural gas, or coal. this paper describes modeling and simulations to determine a method for the power performance evaluation of autonomous wind turbine system. a speed control regulator is utilized to control the dc bus voltage. the inverter gate’s signals...

Thyristor based controlled method in AC voltage regulator has very low dynamic response and discharge large amount of harmonic components. And a PWM Controlled Buck-Boost AC Voltage Regulator can efficiently and economically used in low and medium power applications in the advantage of design simplicity with operation reliability in a clear withstand of naturally commutated schemes. It has very...

This paper investigates an improved control strategy for a doubly-fed induction generator (DFIG) based wind-power generation system with series grid-side converter (SGSC) under network unbalance and harmonic grid voltage distortion conditions. The integrated mathematical modeling of the DFIG system with SGSC is established by taking both the negative-sequence and harmonic components of the grid...

In this paper, an improved maximum power point (MPP) tracking (MPPT) with better performance based on voltage-oriented control (VOC) is proposed to solve a fastchanging irradiation problem. In VOC, a cascaded control structure with an outer dc link voltage control loop and an inner current control loop is used. The currents are controlled in a synchronous orthogonal d, q frame using a decoupled...

The electrostatic charger can be operated in automatic or manual mode. In automatic mode, the high voltage is controlled by means of an analog input ranging from 0–5 V, corresponding to 0–20 kV at the high voltage side of the device. In our case, a laptop running NI Labview 7.1® and a DAQCard 6062E® (National Instruments, Austin, TX, USA) was used to provide the analog control signal. The 0–5 V...