VVC In-loop Filters

Semi-G-filters, Stonean filters, MTL-filters, divisible filters, BL-filters and regular filters in residuated lattices

At present, the filter theory of $BL$textit{-}algebras has been widelystudied, and some important results have been published (see for examplecite{4}, cite{5}, cite{xi}, cite{6}, cite{7}). In other works such ascite{BP}, cite{vii}, cite{xiii}, cite{xvi} a study of a filter theory inthe more general setting of residuated lattices is done, generalizing thatfor $BL$textit{-}algebras. Note that fil...

Quadrature Mirror Filters and Loop Groups

In this paper we want to show, that the finite impulse response quadratic mirror filters (QMF) associated to a tower of grids Γ ⊂ H = ZZ can be identified with a right coset of the subgroup Fix(TΓ⊥ ,Map(T n → U(N) : poly) of the group of polynomial loops Map(T → U(N) : poly) with N = |H/Γ |. The QMF with some vanishing moments can be identified with cosets of subgroups. The problem to parameter...

Fuzzy inference system for integrated VVC in isolated power systems

This paper presents a fuzzy inference system for integrated volt/var control (VVC) in distribution substations. The purpose is go forward to automation distribution applying conservation voltage reduction (CVR) in isolated power systems where control capabilities are limited. A fuzzy controller has been designed. Working as an on-line tool, it has been tested under real conditions and it has ma...

A Closed-Loop Selective Harmonic Compensation for Active Filters

This paper proposes a control algorithm for parallel active power filters, based on current-controlled pulsewidth-modulated converters, which allows precise compensation of selected harmonic currents produced by distorting loads. The approach is based on the measurement of line currents and performs the compensation of the selected harmonics using closed-loop synchronous frame controllers. Than...

Transient Responses on Traveling-Wave Loop Directional Filters