Volume-04 , Special Issue-06 , Aug - 2016 Go Back

This paper discusses an control scheme of a Distribution Static compensator (DSTATCOM) to rectify unbalance and improve power quality by reducing harmonics at load end of an autonomous system. This scheme does not require any new hardware implementation. In this proposed technique.Three phase load current active and reactive components are dissociated and are used in association with PI controllers and simple arithmetical operators produces carrier signals for and PWM controller. This signal along with the sinusoidal voltage is used to generate firing pulses for the IGBT switches of a 3 level voltage source inverter (VSI). The result shows that the scheme is effective in reducing total harmonic distortion (THD) in voltage at PCC, load current and competent to overcome unbalance at load end.

DSTACOM; PCC; PI controller; PWM controller; VSI

REFERENCES
[1] J. Ehnberg, “Autonomous Power Systems based on Renewables on Generation Reliability and System Controls”, Thesis for degree of Doctor of Philosophy, Division of Electric Power Engineering, Department of Energy and Environment, Chalmers University of Technology, Göteborg, Sweden,2007.
[2] Y. Hu, Z.Chen,” Dynamic Control of An Autonomous Power System with Power Electronic Converters”, 5th International Conference on Power Electronics and Drives System, PEDS 2003, vol. 2,pp. 1564-1569.
[3] K. Kant, S. R. Arya, B. Singh, “Voltage Sensor less Control Algorithm for Power Quality Improvement in Distribution Network “, Power Systems Conference (NPSC), Dec 2014,pp. 1-6.
[4] H. Akagi and H. Fujita, “A New Power Line Conditioner for Harmonic Compensation in Power Systems,” IEEE Trans. Power Delivery, vol. 10, no. 3, pp. 1570–1575, Jul. 1995.
[5] B. Singh, J. Solanki, “ Load compensation for Diesel Generator-Based Isolated Generation System Employing DSTATCOM”, IEEE transactions on Industry Applications, vol. 47, pp. 238-244.
[6] A. Chandra, B. Singh, B. N. Singh, and K. Al-Haddad, “An improved control algorithm of shunt active filter for voltage regulation, harmonic elimination, power-factor correction, and balancing of nonlinear loads,” IEEE Trans. Power Electron., vol. 15, no. 3, pp. 495–507, May 2000.
[7] A. K. Ziarani and A. Konrad, “A method of extraction of non stationary sinusoids,” Journal of Signal Process., Elsevier, vol. 84, no. 8, pp. 1323–1346, Aug. 2004.
[8] T. Al Chaer, J. P. Gaubert, L. Rambault, and M. Najjar, “Linear feedback control of a parallel active harmonic conditioner in power systems,” IEEE Trans. Power Electron., vol. 24, no. 3, pp. 641–653, Mar. 2009.
[9] S. George, V. Agarwal, ”A Novel, DSP Based Algorithm for Optimizing the Harmonics and Reactive Power Under Non-Sinusoidal Supply Voltage Conditions”, IEEE Transactions on Power Delivery, vol. 20, no. 4, Oct. 2005, pp. 2526-2534.

Sourav Ghosh, Saumyadeep Mahata, Epsita Das, Ambarnath Banerji, "Improvement of Power Quality in an Autonomous System using DSATCOM", International Journal of Computer Sciences and Engineering, Vol.04, Issue.06, pp.149-151, 2016.

College Automation System Project will work on college area network. It will include all the four departments in the college. It will have admission system for, class attendance, online notes and notice board , placement systems so that their students can get all the information by using their valid registration id and password. Let us see how this College Automation System Project will work. College Automation System Project will also help the college administrator. Administrator will able to get all the information regarding any faculty members on particular day and time. Admin panel will also able to edit the login display panel of teachers, staff members, students etc.Admin can add person, delete person, can give special permission. Admin can schedule classes, their lectures time. Teachers can get information of any students under their particular class. Teachers can also make query by using grade, percentage, can see list of students who comes under the category of attendance shortage and many more under this one roof.For student section, they can get any particular teacher’s notes of particular day and other information regarding their campus, such as placement session details, upcoming companies in particular month, their criteria, their venue details and many more. Student section will also include learning section, so that students can prepare for their exams.

College Automation, admission system

[1] R.S. Pressman, Software Engineering: A Practitioner’s approach, McGraw-Hill.
[2] Javadocs.Oracle.com
[3] https://en.wikipedia.org.
[4] https://www.google.co.in
[5] http://www.oracle.com/index.html

Swati Mishra, Utpal Naskar ,Arkanil Dutta, Sanchita Sahu, Sourajit Chatterjee, Sumana Mazumdar, "College Automation System", International Journal of Computer Sciences and Engineering, Vol.04, Issue.06, pp.152-156, 2016.