iosr-JEEE   Volume-12 ~ Issue-2 ~ Mar-Apr 2017

Abstract: In this paper, Three Phase Shunt Active Harmonic Filter is used for harmonic compensation of fully Controlled loads by using new thyristorized Pulse Generator Circuits which generates 12 Pulses for two Non-Linear three phase Loads. The three phase Non-Linear Loads are connected at the secondary of three phase Transformers with Three Phase Breakers having Transition time 5/60seconds. A new Pulse Generator topology is used for generating pulses for each of three phase non-linear loads. The Circuit used for Compensation of Harmonics having three phase IGBT based Inverter. The IGBT base d Shunt Active Harmonic Filter gets firing Pulses from PLL phase Locked Loop& Hysteresis...........
Key Words: Shunt Active harmonic filter (SAHF), IGBT inverter, Phase locked loop (PLL), Hysteresis Switching (HS), Point of common coupling (PCC), Thyristorized pulse generator.

[1]. M. El-Habrouk, M.K. Darwish and P. Mehta, "Active Power Filter: A Review," IEEE Proc. Electr.Power.Appl, pp. 403-413, Sept 2000
[2]. B. Singh, K. Al-Haddad and A. Chandra, "A Review of Active Filter for Power Quality Improvements," IEEE Trans. on Industrial Electronics, pp. 960-971, Feb 1999
[3]. Fang Zheng Peng, "Harmonic Sources and Filtering Approaches," IEEE Industry Applications Magazine, pp. 18-25, July 2001
[4]. Fang Zheng Peng, "Application issues of Active Power Filters," IEEE Industry Applications Magazine, pp. 21-30, Sept 1998
[5]. H.L. Jou, "Performance Comparison of the Three-phase Active-power-filter Algorithms," IEE Proc. Gener. Trans. Distrib., pp. 646-652, Nov 1995

Abstract: An advanced hybrid LLC series resonant converter with united flying-capacitor cell is proposed in this paper to permit the high step-down conversion in the high input voltage applications. The in-built flying-capacitor branch in the primary side can efficiently share out the primary switch voltage stress related with the half-bridge LLC converters. And the input voltage can be shared correspondingly and automatically between the two series half-bridge components lacking additional balance circuit or control strategies owing to the built-in flying- capacitor cell. Likewise, the inherent soft switching performance in extensive load range that exists in the LLC converters is still kept............
Key Words: Flying capacitor, Hybrid LLC converter, VoltageAuto-balance.

[1]. J.M.Alonso, J.Vi˜na,D.G.Vaquero, G.Martinez, and R.Os´orio, "Analysis and design of the integrated double buck-boost converter as a high- power factor driver for power-LED lamps," IEEE Trans. Ind. Electron., vol.
[2]. 59,no. 4, pp. 1689–1697, Apr. 2012.
[3]. M. Arunkumar "A new active clamping soft switching Weinberg converter," in Proc. IEEE Symp. Ind. Electron. Appl., 2009, pp.910–913
[4]. Y. C. Hsieh, M. R. Chen, and H. L. Cheng, "An interleaved flyback
[5]. converter featured with zero-voltage-transition," IEEE Trans. Power Electron.,vol. 26, no. 1, pp. 79–84, Jan. 2011.

Abstract: The Internet is an open space where a great number of computer systems are connected. Since many services are provided through the Internet, malicious users can easily intrude on any of those systems by using the vulnerabilities of the Internet. Although Intrusion Detection and Prevention System (IDPS) can be used to defend against such malicious activities, it is not always possible to completely protect a targeted system against the attacks. For this reason, Intrusion Tolerance Systems (ITS) has been proposed to maintain services even in threatening environments, where some malicious attacks have intruded into a system successfully. In this paper, we propose a new ITS...............
Key Words: Intrusion Tolerance System (ITS), Service redundancy level, Self Cleansing Intrusion Tolerance (SCIT), Virtual Machine (VM)

[1] Kwon, Ohmin, et al, "A Survey on Intrusion-Tolerant System," Korea Computer Congress 2012, 2012.
[2] Internet Security Threat Report 2015 - Symantec, https://www.symantec.com
[3] Y. Huang, D. Arsenault, and A. Sood, "Closing cluster attack windows through server redundancy and rotations." Proc of the sixth
intl sysmp on Cluster Computing and the Grid Workshops, 2006.
[4] Q. Nquyen, and A. Sood, "Realizing S-Reliability for Services via Recovery-driven Intrusion Tolerance Mechanism" International
conference on dependable systems and networks workshops. 2010
[5] Lim, Jungmin, et al. "A novel Adaptive Cluster Transformation (ACT)-based intrusion tolerant architecture for hybrid information
technology." The Journal of Supercomputing 66.2 (2013): 918-935.