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The paper is focused on power flow control in energy systems with grid-on renewable energy sources employing time-proportional controlled and phase angle controlled resistive loads (like boilers) to balance energy produced by the sources. The system operational properties are described and major mechanisms affecting power and voltage quality are identified. Contributions of the pulse-width regulated...
The protection to the sensitive loads from voltage sags, swells and harmonics can be achieved using the dynamic voltage restorer (DVR) in a cost effective manner. In this paper, a new control algorithm based on unit templates and instantaneous symmetrical component theory along with complex Fourier series is used for the generation of reference voltages for a dynamic voltage restorer (DVR). These...
In this paper, a study on the operation of a static synchronous compensator for distribution systems, D-STATCOM, in relation to its performance in the presence of events that can affect system's power quality, is presented. Performance under short-circuit and load variation is assessed. The IEEE 13 node test feeder, which is a highly loaded unbalanced system, is used in the study. The D-STATCOM consists...
This paper presents a one stage circuit topology for a double buck chopper type single phase PFC converter with active power filtering function in a utility AC grid side and DC output power quality, which can realize much smaller in reactor size and lighter in its weight, along with two unique channel control schemes. The main advantageous point of the newly-proposed PFC converter includes that the...
This paper proposes an effective control scheme for three-phase three-wire (3P3W) active power filter using neural-based harmonic identification scheme. To achieve excellent steady state and dynamic response, the feedback control plus feed-forward control structures is utilized in the proposed control algorithms. The steady-state error minimization is achieved by the feedback loop, where the proportional...
The presence of current harmonics in the grid causes major problems such as overheating and electromagnetic emissions. Active Power Filters (APF) have been presented as alternative to reduce such harmonics. In this paper, a new constant-frequency control scheme based on the linear decoupling principle is proposed for a shunt three-phase fourwire APF. The APF is used to compensate the current distortion...
The following topics are dealt with: power electronics; dc-dc converters; VRM design; dc-ac inverters; voltage source inverters; power semiconductor devices; induction motor drives; digital control; alternative energy; renewable energy; motor control; soft switching converters; resonant converters; passive components; power quality; utility applications; power factor correction; automotive applications;...
This paper presents the design of a prototype distribution static compensator (D-STATCOM) for load compensation in an unbalanced distribution system. The D-STATCOM is intended to replace the widely used static VAr compensator (SVC). The compensation scheme of the D-STATCOM is derived using the symmetrical component method. In this work, the 12-pulse D-STATCOM configuration with IGBT has been designed...
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