This paper describes the development of a low cost shunt active power filter with digital control, which allows dynamic power factor correction and both harmonics and zero-sequence current compensation. The active filter controller is based on the instantaneous power theory (p-q theory) and was implemented using a standard 16 bits microcontroller. The p-q theory is introduced followed by the pr...

This paper describes role of UPQC as applied to a 3P4W system to improve PQ. The Forth wire of 3P4W system is developed by means of neutral of series transformer. Neutral current which flows through neutral terminal of transformer is removed with the help of 4 leg voltage source inverter (VSI) topology for shunt part. The series transformer neutral will have 0 potential in all conditions of ope...

Pulse width modulation (PWM) converters are frequently used due to unity power factor operation with reduced total harmonic distortion (THD) at ac mains and also provide constant-regulated dc output voltage even under fluctuations of ac voltage and dc load. This paper contains the harmonics analysis of sinusoidal PWM (SPWM) technique and space vector PWM (SVPWM) technique for three-phase AC to ...

Nowadays, new challenges arise relating to the compensation of power quality problems, where introduction innovative solutions based on electronics is paramount importance. The evolution from conventional electrical grids smart requires use a large number converters, indispensable for integration key technologies, such as renewable energies, electric mobility and energy storage systems, which a...

student details: name:T.kavitaha rollno: 09a01d4302 nova college of engg& technology vegavaram, jangareddigudem, westgodavari, andhrapradesh phno:09440182883 email:[email protected] 1. Abstract. The abundant use of Non-linear loads in distribution system leads to power quality issues, The proliferation of microelectronics processors in a wide range of equipments, from home VCRs and d...

This project proposed the new distortion power quality index to replace the previously proposed index. Its computation was carried out based on the load composition rate (LCR) and Euclidean norm of total harmonic distortions (THDs) of the measured voltage and current waveforms at the point of common coupling (PCC). Based on the proposed PQI, the harmonic pollution ranking, which indicates how m...