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A New Hybrid Power Conditioner for Suppressing Harmonics and Neutral-Line Current in Three-Phase Four-Wire Distribution

A New Hybrid Power Conditioner for Suppressing Harmonics and Neutral-Line Current in Three-Phase Four-Wire Distribution

In this paper, a new hybrid power conditioner is proposed for suppressing harmonic currents and neutral-line current in three-phase four-wire distribution power systems. The proposed hybrid power conditioner is composed of a neutral-line current attenuator and a hybrid power filter. The hybrid power filter, configured by a three-phase power converter and a three-phase tuned power filter, is utilized to filter the nonzero-sequence harmonic currents in the three-phase four-wire distribution power system. The three-phase power converter is connected to the inductors of the three-phase tuned power filter in parallel, and its power rating can thus be reduced effectively. The tuned frequency of the three-phase tuned power filter is set at the fifth harmonic frequency. The neutral- line current suppressor is connected between the power capacitors of the three-phase tuned power filter and the neutral line to suppress the neutral-line current in the three-phase four-wire distribution power system. With the major fundamental voltage of the utility dropping across the power capacitors of the three-phase tuned power filter, the power rating of the neutral-line current suppressor can thus be reduced. Hence, the proposed hybrid power conditioner can effectively reduce the power rating of passive and active elements. A hardware prototype is developed to verify the performance of the proposed hybrid power conditioner. Experimental results show that the proposed hybrid power conditioner achieves expected performance.

158 views • 11 slides


Maritime Boundary Protection System Using Floating Station

Maritime Boundary Protection System Using Floating Station

The Island like Sri Lanka, peninsula like India and the coastal countries are separated by their maritime borders. The people livelihood in coastal area of those countries purely depends on fishing occupation in the sea. The sea border between two countries is not easily identifiable, which is the main reason for this cross border cruelty. The main objective of this system is to help the fishermen to navigate inside our maritime country border. For this we are constructing a Floating Station uses Hybrid power which is placed in the countries border. If a fisherman navigates beyond the country's border, an alarm is generated indicating that the fisherman is nearing the border. Along with this we are using RSSI for identification of boat. Additionally a message transmitter is interfaced with this device to send a message in the encoded form to base station indicating that a vessel has crossed the border using IoT. Thus guards can assist and provide additional help to those fishermen if needed. Reshma. R | Roslin Priyadharshini. G | Vishnupriya. P | Kapila Vani. R. K "Maritime Boundary Protection System Using Floating Station" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-3 , April 2018, URL: https://www.ijtsrd.com/papers/ijtsrd11350.pdf Paper URL: http://www.ijtsrd.com/engineering/computer-engineering/11350/maritime-boundary-protection-system-using-floating-station/reshma-r

69 views • 6 slides


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