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Shunt active power filter, when used with nonlinear loads, provides an elegant solution for reactive power compensation as well as harmonic mitigation leading to improvement in power quality. The present study deals with fuzzy logic control and neuro fuzzy control for Shunt active power filter. Neuro fuzzy logic has improved THD when compared to fuzzy logic controller and it is demonstrated through...
Use of power electronic converters with nonlinear loads leads to power quality problems by producing harmonic currents and drawing reactive power. A shunt active power filter provides an elegant solution for reactive power compensation as well as harmonic mitigation leading to improvement in power quality. However, the shunt active power filter with PI type of controller is suitable only for a given...
Use of power electronic converters with nonlinear loads produces harmonic currents and reactive power. A shunt active power filter provides an elegant solution to reactive power compensation as well as harmonic mitigation leading to improvement in power quality. However, the shunt active power filter with PI type of controller is suitable only for a given load. If the load is varying, the proportional...
The major problems of nonlinear loads are harmonic generation and the drawing reactive power. Active power Alter which is an excellent solution for mitigating harmonics and reactive power compensation leading to improvement in power quality when using a nonlinear loads. The present study deals with fuzzy logic control and neuro fuzzy control for Shunt active power filter. Neuro fuzzy logic has improved...
Shunt Active Power Filter (SAPF), when used with non linear loads, provides an elegant solution to reactive power compensation as well as harmonic mitigation leading to improvement in power quality. The present study deals with fuzzy logic control for SAPF. Its superiority over PI type of controller is demonstrated through simulation results.
Dissimilar traditionalistic passive type harmonic power filters, modern active type harmonic power filters have the favorable multiple functions: harmonic filtering, damping, reactive-power control for power factor correction and voltage regulation, load balancing, voltage-flicker reduction etc., This paper presents a hybrid fuzzy logic controlled based improved power quality conditioner used to counterbalance...
The performance of reference current computation method based on Fryze, Buchholz, Dpenbrock (FBD) algorithm is focused on. An adaptive low-pass filter (LPF) based on fuzzy logic is proposed, which is composed of two two-order Butterworth LPFs, and fuzzy logic is developed taking changing amplitude of load current and harmonic number of the lowest harmonic current into account. The selection and switching...
The working performance of the active power filter is dependent on harmonic current detection. Based on adaptive noise canceling technology, this paper improved the classic LMS algorithm ant got a fuzzy variable step-size LMS algorithm of harmonic current detection which uses the average estimation of error signal to control the updating of step-size by fuzzy inference. The algorithm has a fast response...
The conventional PI controller used in active power filters (APF) requires precise linear mathematical models, which are difficult to obtain and may not give satisfactory performance under parameter variations, load disturbances, etc. In order to address this shortcoming, the novel fuzzy logic controller which is composed of PI controller and fuzzy controller is proposed in this paper. The combined...
The characteristics of the error signal and the sensitive trait to the object of PI control limit the application of conventional PI control in the active power filter(APF). In order to overcome these disadvantages, a novel PI control strategy is proposed in this paper. Firstly, we improved the conventional PI control strategy by using the method of phasor superposition. Secondly, we combine it with...
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