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Development of a microcontroller-based power factory corrector

Eh Kan, Chessda Uttraphan and Kok , Boon Ching and Zulkifli, Shamsul Aizam and Lai , K.H. (2007) Development of a microcontroller-based power factory corrector. In: 1st Engineering Conference on Energy and Environment, 27-28 December 2007, Kuching, Sarawak.


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Power factor corrector (PFC) has been widely used in the industrial power systems to restore the system power factor to as close to unity as is economically viable. Most of the power factor correctors are of static type in order to deal with the inductive loads such as the electric motors, compressors, and even the fluorescent lightings. The static type PFC however, facing inadequate application whenever the inductive load changes. This paper presents a microcontrollerbased self-adaptive power factor corrector for poor power factor (linear or nonlinear) loads applications. The design intention of this auto-adjustable power factor corrector is to ensure the power system always preserving almost unity power factor and thus optimizing the current consumption. Power factor value is initially measured via microcontroller and it is then compared with the predetermined reference value. Accordingly, the system poor power factor will then be adjusted by the aid of the microcontroller to as close the predetermined value as possible. The proposed power factor corrector has an adjustable sensitivity of SO microseconds or 0.9 degree interval step setting. The proposed power factor corrector is demonstrated on a range of laboratory testing by using the induction motors and the fluorescent lightings as the system test loads. From the validation tests, it can be concluded that the proposed power factor corrector has great capability to reduce the wasted energy in distribution system.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: power factor; firing angle; PIC; reactive load
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1001-1841 Production of electric energy or power. Powerplants. Central stations
Divisions: Faculty of Electrical and Electronic Engineering > Department of Electrical Power Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 04 Oct 2011 04:33
Last Modified: 04 Oct 2011 04:33
URI: http://eprints.uthm.edu.my/id/eprint/1887
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