International Journal of Electrical and Electronics Engineering

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.