International Journal of Electrical and Electronics Engineering

1-10

Authors: GAJENDRA R. PATEL, DILIP B. PATEL & KINJAL M. PAGHDAL

Among the differnt Non-conversion energy resources, the photovoltaic (PV) system that is uses the solar energy to produce electricity it is one of renewable energy source. It has a great potential and developing fast compared to other renewable energies. Photovoltaic system can be either stand-alone or connected to utility grid. The disadvantage of this PV generation depended on atmospheric conditions such as solar irradiance and temperature. Maximum power point trackers (MPPTs) play an important role in photovoltaic (PV) power systems because it is maximize the output power of a PV system for a given atmospheric conditions so it is maximize the PV array efficiency. MPPT is maintaining operating point at the maximum power point using a different MPPT algorithm. MPPT can minimize the overall photovoltaic (PV) system cost. For maximize the output of a PV system, continuously tracking the maximum power point (MPP) is necessary.

1-12

Authors: VIJAY KUMAR GARG & REENA DHANDA

Micro-grid conception exploits as a resolution to integrate liberal amounts of micro generation without obstructing the operation of utility grid. Generation of power from renewable energy sources like solar, wind, micro-turbines, fuel cells etc will give eloquent energy in near future. Consequently, AC/DC micro-grid will be the perfect resolution to moderate multiple reverse conversions (dc-ac-dc or ac-dc-ac) in an exclusive ac or dc grid. The contemplated micro grid contained both AC and DC networks coherent to distribution generation by using the multi-bidirectional converters. AC sources and loads are coherent to AC network whereas DC sources and loads are connected with the DC network. DC or AC links are connected by energy storage systems. This micro-grid can conduct in a grid-tied or isolated mode. For smooth power exchange between AC and DC links during multifarious supply and demand conditions, the coordination control schemes are contemplated. Modelling and simulation of a small micro grid is done using the Simulink in the MATLAB. The results of simulation shows that the system can prolonged stable operation under the contemplated coordination control schemes when the grid is commutated from one operating condition to another.

25-36

Authors: SUBIR DATTA

This paper presents the performances of a grid connected DFIG based WT system with and without speed sensor and their effectiveness have been compared. Performances of the controller have been demonstrated through time domain simulation studies. Simulation results have been compared and conclusions have been drawn. Results show that the satisfactory operation of speed sensor-less system under varying wind speed power generation as that of speed sensor controller.

1-8

Authors: PARAMJIT SINGH KANWAR & R K SHARMA

Last two decades, power demand has increased substantially while the expansion of power generation and transmission has been severely limited due to limited resources and environmental conditions. some transmission lines are heavily loaded and the system stability becomes a poor. Steady state and transient problems in a power system have undesirable consequences on the system. The main objective of this paper is a comparative investigate in enhancement of voltage stability via static synchronous series compensator (SSSC) and static synchronous shunt compensator (STATCOM) externally controlled by a POD controller. The new designed P.O.D controller is very efficient for voltage stability and power system stability under transient conditions. This paper discusses and demonstrates the comparison between the STATCOM with P.O.D controller and SSSC with P.O.D controller, to power system for effectively regulating system voltage for different types of faulted condition. Simulation results shows that STATCOM with POD controller is more effective to enhance the voltage stability and power system stability and increase transmission capacity in a power system.

19-26

Authors: GAMI ASHISH N & V. M. DHOLKIYA

This paper focuses on the problem of optimal placement of the PMU (Phasor Measurement Unit) in a large power network. Optimal PMU placement has multiple solutions depending upon the consideration of constraints and therefore consideration of field based topological and operational criteria can give better and actual result. This has been carried out using integer linear programming with the consideration of different types of criteria such as, zero injection measurement, cost constraint, voltage level, future expansion, bus location in the network, owner of the substation, centre of load point, availability of communication link, connection with generating station and evaluation based on system operating condition. Different indices like BOI (Bus Observability Index), SORI (System observability Redundancy Index) and System Operating conditions are also being considered for determination of location at which PMU can be installed to achieve full network observability. It has been clearly visualized change in location of PMU in cases of with and without consideration of said criteria.

33-42

Authors: NISHA AGARWAL & PRIYANKA YADAV

Mobility and portability is the major advantages that IEEE 802.11 wireless networks offer over their traditional counter- parts, i.e. wired Ethernet networks. However, when nodes are mobile or portable units, power consumption becomes a primary issue since terminals are usually battery driven. The wireless local area network, WLAN is dominated by IEEE 802.11 standard. It becomes one of the main focuses of the WLAN research. Now most of the ongoing research projects are simulation based as their actual hardware implementation is not cost effective. The main cores of the IEEE 802.1 lb standard are the CSMA\CA, Physical and MAC layers. But only MAC layer for transmitter and receiver are modeled in this paper using the VHDL modeling with the reducing of power consumption. The VHDL (Very High Speed Hardware Description Language) is defined in IEEE as a tool of creation of electronics system because it supports development, verification, synthesis and testing of hardware design, the communication of hardware design data and the maintenance, modification and procurement of hardware. It is a common language for electronics design and development prototyping The main purpose of the IEEE 802.11 standards are to provide wireless connectivity to devices that require a faster installation, such as Laptops, PDA's or generally mobile devices inside a WLAN. Using proposed algorithm, we develop a case study and provide interesting indications to minimize the power consumption of IEEE 802.11 terminals.

55-62

Authors: RAHUL SHARMA & RAM AVTAR JASWAL

This paper presents a topology of induction motor which drives system desegregation, a lift convertor and a IGBT inverter victimization solar photovoltaic panel. The motor is driven with the offered power at the instant. To match resistivity between the solar array and motor load and to improve the panel voltage, a lift dc-dc convertor topology is used, maximum power point pursuit rule is enforced to extract most power from the PV panel. A three level inverter is employed to drive the induction motor. We tend to use IGBT clamped inverter. The proposed system is simulated in matlab and results are mentioned.

10

Authors: M. NAGAMANI & SHAIK FATHIMA

Speech enabled devices are gaining a strong footholds, in the man’s day today life. Several speech recognition applications have implemented, and are available for public or commercial use. Very few of these, however, are available for the Indian Market. We present this paper with the intent of developing a speech controlled music player viable for the Indian customers this paper aims at introducing the concept of handling the existent music player with speech commands. Here we investigated from the speech recognition problem point of view. This system is based on the open source CMU Sphinx-3, from the Carnegie Mellon University.

8

Authors: SHENG-FUU LIN, YI-CHIEH SUN & JIAO-ROU LIAO

Nowadays, in the field of public security surveillance, the issues of abandoned objects and abandoner detection become more and more popular. If the public places are threatened intentionally by the dangerous objects or obstacles on the way of the bus and railway, it will cause lots of society security problems and we should reduce relative risks. Besides, people often leave something in the public region accidentally. For the aforementioned events, institution checks the videos by people to find the abandoned objects and abandoner after events happen. In this paper, we design an intelligent video surveillance to reduce the loading of human resource, enhance the security and reliability of surveillance system. There are three contributions of this paper. First, this paper proposes a set of features, including the invariant moments and histogram of gradients to detect the abandoned objects more accurately. Second, this paper proposes an analysis of projection vector and estimation of angle to improve the accuracy of the abandoner detection. Finally, a prototype is designed to detect the abandoned objects and their own abandoner.