Smart metering has been seen as an essential part of the vision of smart grids .

Concerns about power quality (PQ) is growing due to the appearance of new components, which are sensitive to various powersupply disturbances like harmonic distortions, voltage drop, voltage spikes,arc faults etc.

Low cost

Detect and log PQ related problems

Arc fault detection capability

Helps monitor voltage/current peak and rms values, THD, etc.

Arc faults normally take place due to wiring problems and is one of the main reasons for home fires.Two types:

SERIES ARC FAULT

o PARALLEL ARC FAULT

Using Mayer’s Arc Model, we get

o Using the equations, a MATLAB simulink model for series arc fault is created.

The following parameters were used in the simulation:

α=2.9e-5, Ip=25A,Lp=2 mm, uc=25Lp.

System voltage is 120v/60Hz,RL=5ohms,Rs=1ohms,

arc start time=0.03s

SERIES ARC FAULT SIMULATION RESULTS

The wavelet transform is used to analyse the signal and hence extracting the local signal disturbances.

Daubechies Wavelets allows extracting local signal disturbances with very high quality.

A system was designed and developed that is capable of measuring single-phase PQ related parameters and series arc-fault conditions .The system is built around a low-cost microcontroller with DSP capabilities and can be easily extended by adding features in firmware. It could be directly applied to smart grid due to its low-cost, wireless, and logging capabilities.

M. Naidu, T. Schoepf, and S. Gopalakrishnan, “Arc fault detectionscheme for 42 V automotive DC networks using current shunt,” IEEETrans. Power Electron., vol. 21, no. 3, pp. 633–639, May 2006.

R. Beck and G. Dempster, “Finite-precision Goertzel filters used for signal tone detection,” IEEE Trans. Circuits Syst. II, Analog Digit Signal Process., vol. 48, no. 6, pp. 691–700, Jun. 2001.

I. Khan and M. Critchley, “Arc fault detector,” 2000, vol. 25, no. 3,pp. 1–4. [Online]. Available: http://ebookbrowse.com/arc-fault-detector-paper-pdf-d245318580

THANK YOU