International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
Design of Smart Filter for Cancellation of Current and Voltage Harmonics in Three phase System Amol Pawar1, Sandip Ghuge2, Nitin Kedar3, Akshay Satav4 1Amol
Pawar, Electrical Engineering, SVIT and Engineering College, Maharashtra, India Ghuge, Electrical Engineering, SVIT and Engineering College, Maharashtra, India 3Nitin Kedar, Electrical Engineering, SVIT and Engineering College, Maharashtra, India 4Akshay Satav, Professor, Dept. Of Electrical Engineering, SVIT and Engineering College, Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------2Sandip
Abstract -The new way of cancellation of current and
1.1FBS Hybrid Power Filter
voltage harmonics in three phase system was introduced in this paper. Wide use of non-linear load, results in current harmonics causes frequent problems such as overheating of building wiring, overheating of transformer units and failure in electronics equipment. The desired aim is to reduce current and voltage harmonics to improve the power quality. A new filter having a combination of PI and Fuzzy controllers which eliminates maximum amount of harmonics.
FBS filter topology use only single phase inductances and capacitors, without using any transformer or special electromagnetic device. This FBS filter can work as a passive filter when passive component are employed or as a hybrid filter to improve its efficiency. A FBS power filter has two different resonance frequency one for pn-seq such as 5th, 7th,11th and 13th order harmonics and another one for z-seq such as 3rd,9thand 15th order current harmonics.[3] The diagram of FBS Filter is as shown in figure 1.The pnseq
Key Words: p o w e r p o w e r p o w e r s y s t e m
f i l t e r s, h y b r i d f i l t e r s , p a s s i v e f i l t e r s , p o w e r h a r m o n i c s.
a b c
1. INTRODUCTION Current and voltage harmonics in power distribution system are generated by non-linear loads such as UPS, inverters, adjustable speed drives and other power electronic equipment which causes power quality issues such as over neutral current, reactive power problem, unbalanced current and low efficiency[1]. In four wire distribution system, due to delta connected primary, the triplen harmonic currents (3rd, 9th, and 15th) can only circulate in primary delta winding of transformer causing overheating. Excessive heating can reduce the bearing lubrication which collapse the bearing. Power cables carrying harmonic loads has a harmful effect on televisions, telephones, control systems and other equipment. The range 540 Hz to 1200 Hz (9th harmonic to 20th harmonic at 50 Hz fundamental) can be troublesome [2]. IEEE guidelines are suggested to limit the power quality problems created by harmonics. Thus many harmonic mitigation techniques with various passive filter configurations were developed to provide suitable impedance to harmonics such as shunt, or series or their combination. Passive filters have some shortcomings; those are fixed compensation, resonance, bulky size etc. This problem can be evaded by using active filters. Active filters are switch mode power electronic converter which supplies distortion free current. But large VA rating of active convertor.
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Impact Factor value: 5.181
if a
b
c
u12 Zf O’
o FBS filter
Zn
u0
in n
n
Fig -1: FBS Power Filter with impedance and z-seq voltage components of the 3 phase network that the filter is connected to are also shown in figure 1 [4].The FBS filter consist of 3 phase branches with 3 identical single phase impedances Zf and one neutral branch impedance Zn ⃗
( )
Where is pn-seq voltage and The z-seq impedances ⃗
is pn-seq current.
( )
is Z seq voltage component and component.
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ISO 9001:2008 Certified Journal
is Z seq current
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