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International Journal of Research in Computer and Communication Technology
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  This is an Open Access Journal Open Access journal
     ISSN (Print) 2320-5156 - ISSN (Online) 2278-5841
     Published by Suryansh Publications Homepage  [2 journals]
  • Power Management Strategy In Hybrid PV-FC And Wind- Power Generation
           Systems By Using Multi Input Single-Control (MISC) Battery

    • Authors: Pavani Yadav Gonti, S.Siva Prasad
      Abstract: Global energy consumption is dramatically increasing due to higher standard of living and the increasing world population. The world has limited fossil and oil resources. As a consequence, the need for renewable energy sources becomes more urgent. With the fast development of renewable energy technology, it proposes increasing demand for the higher education. This paper proposes a unique standalone hybrid power generation system, applying advanced power control techniques, fed by four power sources: wind power, solar power, Fuel cell, and diesel engine generator, and which is controlled by Multi input Single-Control (MISC) Battery used for commercial power system. As per the characteristic of the source, the proposed converter works under various operating modes which are discussed in this paper. The concept is validated using a laboratory prototype for different operating scenarios with a solar panel as a master source working under MPPT.
      PubDate: 2014-10-27
      Issue No: Vol. 3 (2014)
  • Enhancement of Power Quality in Distribution line by Using Distributed
           Power-Flow Controller (DPFC)

    • Authors: P. Jithendar, Giri Babu, S.Siva Prasad
      Abstract: This paper describes the steady-state response and control of power in transmission line equipped with FACTS devices. Detailed simulations are carried out on two-machine systems to illustrate the control features of these devices and their influence to increase power transfer capability and improve system reliability. The DPFC is derived from the unified power-flow controller (UPFC) and DPFC has the same control capability as the UPFC. The DPFC can be considered as a UPFC with an eliminated common dc link. The active power exchange between the shunt and series converters, which is through the common dc link in the UPFC, is now through the transmission lines at the third-harmonic frequency. The interaction between the DPFC, the network and the machines are analyzed.
      PubDate: 2014-10-27
      Issue No: Vol. 3 (2014)
  • Enhancement Of Power Quality Under Different Fault Condictions And
           Harmonic Elimination By Using D-Statcom

    • Authors: D. Lakshmi, S Siva Prasad
      Abstract: this paper mainly focuses on power quality with D-STATCOM Due to the non-standard voltage, frequency, and current at distribution side. In this paper the role of D-STATCOM (Distribution Static Compensator) are located at load side in electrical distribution system under normal operating and fault conditions is examine. Here D-STATCOM is used as a FACTS device which can compensate the reactive power. D-STATCOM is a voltage source converter; it can be used to compensate the voltage and make the system stable by compelling and generating reactive power. Here by using D-STATCOM to compensate the problems in distribution system such as voltage sag, voltage instability, in power systems with different fault conditions for LG, LLG, 3-hase, LCL filter The D-STATCOM injects a current into the system to mitigate the voltage sags. LCL Passive Filter was then added to D-STATCOM to improve harmonic distortion and low power factor in power faults. Here Simulink model and control system is designed in MATLAB/SIMULINK.
      PubDate: 2014-10-27
      Issue No: Vol. 3 (2014)
  • Enhancement of Power Quality in Multi Feeders by using MC-DPFC

    • Authors: B. Manaswini, S. Vathsal, S. Siva Prasad
      Abstract: According to growth of electricity demand and the increased number of non-linear loads in power grids, providing a high quality electrical power should be considered. In this paper, voltage sag and swell of the power quality issues are studied and distributed power flow controller (DPFC) is used to mitigate the voltage deviation and improve power quality. The DPFC is a new FACTS device, which its structure is similar to unified power flow controller (UPFC). In spite of UPFC, in DPFC the common dc-link between the shunt and series converters is eliminated and three-phase series converter is divided to several single-phase series distributed converters through the line. The case study contains a DPFC sited in a single-machine infinite bus power system including two parallel transmission lines, which simulated in MATLAB/Simulink environment. The presented simulation results validate the DPFC ability to improve the power quality.
      PubDate: 2014-10-27
      Issue No: Vol. 3 (2014)
  • Z-source Inverter based DVR for Power Quality Improvement

    • Authors: Goruganti Sravanidevi, S. Siva Prasad
      Abstract: Interest  in Power  Quality  has  been explicitly seen in Electrical Power Engineering since past decade, even though utilities all over the world have for decades worked on the improvement  of  voltage quality,  what  is now  known as  power  quality.  Typical power problems include voltage sag, harmonics, notching, transients like surge, swell, etc.  Control of power quality problems involves cooperation between network operator (utility), customer and equipment manufacturer.  A Dynamic Voltage Restorer (DVR) is a distribution voltage DC-to-AC solid-state switching converter that injects three single phase AC output voltages in series with the distribution feeder and in synchronism with the voltages of the distribution system. A DVR is interface equipment between utility and customer connected in series between the supply and load to mitigate the three major power quality problems, namely, the voltage sags, swells, and interruptions.  The equations are formulated for calculating the voltages and power injected (inverter rating) from each of the three DVR phases (3-phase DVR). The modeling of Z-source based dynamic voltage restorer is carried out component wise and their performances are analyzed using MATLAB software.
      PubDate: 2014-10-27
      Issue No: Vol. 3 (2014)
  • Switched Boost Inverter for Standalone DC Nanogrid Applications

    • Authors: S. Venkatesh, S. Vathsal, S. Siva Prasad
      Abstract: Switched boost inverter (SBI) is a single-stage power converter derived from Inverse Watkins Johnson topology. Unlike the traditional buck-type voltage source inverter (VSI), the SBI can produce an ac output voltage that is either greater or less than the available dc input voltage. Also, the SBI exhibits better electromagnetic interference noise immunity when compared to the VSI, which enables compact design of the power converter. Another advantage of SBI is that it can supply both dc and ac loads simultaneously from a single dc input. These features make the SBI suitable for dc nanogrid applications. In this paper, the SBI is proposed as a power electronic interface in dc nanogrid. The structure and advantages of the proposed SBI-based nanogrid are discussed in detail. This paper also presents a dq synchronous-reference-frame-based controller for SBI, which regulates both dc and ac bus voltages of the nanogrid to their respective reference values under steady state as well as under dynamic load variation in the nanogrid.
      PubDate: 2014-10-27
      Issue No: Vol. 3 (2014)
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