In this paper, the Renewable energy sources, which have been expected to be a promising alternative energy source, can bring new challenges when it is connected to the power grid. However, the generated power from wind energy source is always fluctuating due to environmental condition. In the same way wind power injection into the electrical grid affects the power quality due to the fluctuation...

Power quality (PQ) assurance is a vital part of electrical distribution networks. There are many advantages and benefits improving PQ, especially in the modern/smart grid. Smart grid (SG) has lot complicated sensitive components (non-linear loads) addition to renewable energy systems (wind-solar) that may also be source PQ disturbances. problems harm personal life national production. Static sy...

This paper presents the designing of a power quality compensator to solve the power quality problem of negative-sequence and harmonic currents in high-speed railway traction systems. The proposed power quality compensator is constituted by railway static power conditioner (RPC), two thyristor-controlled reactors and two thyristor-controlled 3filters. The RPC contains two converters which are co...

This paper presents a new transformation scheme for the control of active power-line conditioner. An active powerline conditioner is a power electronic device which is designed to su.ppress the power-line distortions caused by the non-linear loads. Currently, the method of instantaneous power transformation is the most popular one for the active power-line conditioning control. This method uses...

— The Unified Power Flow Controller (UPFC) is a typical FACTS (Flexible AC Transmission Systems) device that is the most sophisticated and complex power electronic equipment and has emerged for the control and optimization of power flow and also to regulate the voltage in electrical power transmission system. This project propose the real, reactive power and voltage control through a transmissi...

<p>The Power quality of the electrical system is an important issue for industrial, commercial, and housing uses. An increasing request high power number distorting loads had led to increase consideration by customers utilities. The development use flexible alternating current transmission (FACTs) controllers in systems many applications these controllers. A unified flow controller (UPFC)...

Active power conditioners have been developed over the years to solve the problems to improve power quality. Among which shunt active power conditioners is used to eliminate load current harmonics and reactive power compensation. The controller ensures that the dc-side capacitor voltage is nearly constant with small ripple besides extracting fundamental reference currents. The PLL block assists...

This paper presents the development of a control scheme for a multilevel diode-clamped converter connected in a series–parallel fashion to the electrical system such that it can compensate for deviations in utility voltage (sag, surge, and unbalance) and act as a harmonic and/or reactive current source for a load. New carrier-based multilevel pulsewidth modulation techniques are identified to m...

While the unified power quality conditioner based on modular multilevel converter (MMC-UPQC) can be used for recovering of voltage and current in high grids, it is difficult to manage when grid imbalance large. In this paper, a passivity-based control (PBC) combined with sliding mode (SMC) proposed MMC-UPQC improve under unbalance systems. First, according structure MMC-UPQC, equivalent mathema...

 This paper presents the development of a control scheme for a multilevel diode-clamped converter connected in a series-parallel fashion to the electrical system such that it can compensate for deviations in utility voltage (sag, surge, and unbalance) and act as a harmonic and/or reactive current source for a load. New carrier-based multilevel pulse width modulation (PWM) techniques are identi...