Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7112606 | Electric Power Systems Research | 2015 | 8 Pages |
Abstract
This paper presents a method for detecting series arcs for a 230Â V AC-50Â Hz residential installation, its implementation in an embedded circuit and its performance under real conditions. First, we evaluated the inter-period autocorrelation coefficient r of the line current. The algebraic estimation of the derivative of the signal r was then used to obtain an indicator of arc detection. r was calculated on the current at a sampling rate frequency of 5Â kHz and the 50Â Hz component was attenuated by an high pass (HP) filter. Tests carried out with domestic appliances with different power loads (resistive load, lamp, vacuum cleaner, dimmer etc) show a value for r which is very stable and close to 1 under normal conditions. The coefficient r weakens in the presence of an arc (initiated by a carbon path) and is no longer constant. The complete algorithm was implemented in real time on a 32-bit ARM Cortex-M3 microcontroller with a 12-bit ADC. The measuring current, which ranges from 0 to more than 20Â A, was provided by a passive toroidal inductive probe. Four typical household loads were tested. The results obtained show that detection is operative and very fast (10Â ms) with currents which exceed 400Â mA.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Energy Engineering and Power Technology
Authors
Jinmi Lezama, Patrick Schweitzer, Etienne Tisserand, Jean-Baptiste Humbert, Serge Weber, Patrice Joyeux,