This chapter describes the main aspects about distributed generation (DG) systems and investigates the operation of DG systems based on static power converters connected to weak grids. Initially, the concept of DG is discussed, and the main topologies for the con‐ nection of DG systems to the grid are covered. Converters used in such applications are also introduced. When connected to weak grid...

Multilevel inverters have been widely used for high power and high voltage applications as their performance is highly superior to that of conventional two level inverters due to reduced harmonic distortion, lower electromagnetic interference, and higher dc link voltages but it has some disadvantages such as increased number of components, complex pulse width modulation control method and volta...

With the advancements in semiconductor technology, high power medium voltage (MV) Drives are extensively used in numerous industrial applications. Challenging technical requirements of MV Drives is to control multilevel inverter (MLI) with less Total harmonic distortion (%THD) which satisfies IEEE standard 519-1992 harmonic guidelines and less switching losses. Among all modulation control stra...

The single phase inverter performance through the unipolar and bipolar strategies has been previously analyzed based on constant switching frequency pulse width modulation (CSFPWM). However, confined band variable PWM (CB-VSFPWM) is currently proposed as a new technique strategy to facilitate design of high order filter, reduce losses, current total harmonics distortion (THD) well. To evaluate ...

In this paper, a comparative analysis of Total Harmonic Distortion (THD) between wind farms with double-fed induction generators (DFIG) and synchronous permanent magnet (PMSG) integrated into the grid is developed. The Fast Fourier Transform (FFT) technique to evaluate output current signal THD in different fault conditions indicate best performance among used. generation problems are associate...

In general Pulse width modulation (PWM) techniques of a voltage source inverter (VSI) need a sinusoidal reference signal and triangular carrier signal to generate the required modulating signals for the desired output. Modifications in modulating techniques can be considered in two ways, namely modified reference and modified carrier. The existing multilevel carrier based pulse width modulation...

Abstract—This paper presents comparative study and implementation of Unified Power Quality Conditioner (UPQC) to eliminate harmonics and reactive power compensation in a single-phase to threephase converter system. The proposed configuration solves typical problems encountered in remote rural area applications, where only a single-phase supply is available and there is a demand for three-phase ...

Flashover of polluted insulators in contaminated areas is one of the most important factors influencing the operation of transmission and distribution lines and finally line outages. Therefore, it is essential to prevent and detect flashover in the insulators. Hence, utilizing the insulator status monitoring systems and predicting their functions have absorbed a lot of attention over the recent...

There are problems in the limitations of conventional inverters, especially in high-voltage and high-power applications. Recently multilevel inverters are becoming increasingly popular for high-power applications due to their improved harmonic profile and increased power ratings. Several studies have been reported on multilevel inverters topologies, control techniques, and applications. However...

In this paper, two kinds of evaluation index for the haptic motion analysis in parallel multiple degrees–of– freedom (MDOF) system are proposed. At first, the spatial modal decomposition method based on discrete Fourier series expansion (DFS) is presented. Spatial modal information expresses a motion element that corresponds to a specific physical action. The spatial modal information can mathe...