An UPQC (Unified Power Quality Conditioner) is anequipment composed by two active conditioners operating in a combined way. One of the active conditioners is connected in series with the electrical power system, allowing the compensation of problems in the system voltages. The other active conditioner is connected in parallel with the electrical system, and allows the compensation of current ha...

Power quality is the major problem in fast growing electical systems. Persistent increase non linear loads have caused distortions distribution system leading to becoming unbalanced current and voltage waveforms which affect of power.The power issues analyzed this paper relate sag, reactive power, harmonics, interharmonics, subharmonics, voltage, current, inrush Induction motor.Also line ground...

This project presents a power quality improvement of unified power quality conditioner (UPQC) to compensate current and voltage quality problems of sensitive loads. The UPQC consists of the series and shunt converter having a common dc link. The series converter mitigates voltage sag from the supply side and shunt converter eliminates current harmonics from the nonlimear load side. The develope...

مبدل های کاهش کلیدیافته با توجه به مزایای متعدد از جمله هزینه و وزن کم، اندازه کوچک مورد توجه قرار گرفته اند. تاکنون ساختارهای مختلفی در جهت کاهش تعداد کلیدهای مبدل های قدرت در مقالات ارائه شده که می توان آن ها را به دو دسته اینورترهای تک خروجی و اینورترهای چندخروجی دسته بندی کرد. در این مقاله سه ساختار مبتنی بر مبدل های کاهش کلیدیافته بر اساس مبدل های 15 کلیدی 3 ساق و 15 کلیدی 5 ساق و 12 کلیدی...

The power quality (PQ) is a major issue for both electrical utilities and their customers. nonlinear loads cause PQ problems like current harmonics, voltage frequency deviation, sag swell. A unified conditioner (UPQC) utilized in this research to minimize these problems. UPQC made up of two active filters (APFs), one which connected the line series other parallel. Unit Vector Template Generatio...

This paper proposes a novel robust control scheme based on delay-dependent H∞for unified power quality conditioner (UPQC) in a microgrid under the influence of the delay and parameter uncertainties. A new UPQC model considering the effects of the delay and parameter uncertainties is established. Then, the H∞ controller is designed based on the cone complementarity linearization (CCL) algorithm....

شاخص‌های مؤثر بر ادراک کیفیت بازیابی در فضاهای شهری مورد علاقه شهروندان مشهدی (با تأکید کاهش فشار روانی افراد)

This paper presents a control strategy for a Unified Power Quality Conditioner. This control strategy is used in three-phase three-wire systems. The UPQC device combines a shunt-active filter together with a series-active filter in a backto-back configuration, to simultaneously compensate the supply voltage and the load current. Previous works presented a control strategy for shunt-active filte...