In this paper the performance of Unified Power Flow Controller (UPFC) is investigated in controlling the flow of power over the transmission line. This research deals with digital simulation of standard IEEE 14-bus power system using UPFC to improve the real and reactive power flow control through a transmission line by placing UPFC at the sending end using computer simulation. When no UPFC is ...

The technical infrastructure is of crucial importance for modern society and electric power supplies are of particular importance. Society's dependence on electrical energy, communications and information technology is increasing. At the same time users, both industry and households, have overconfidence in technical infrastructure functionality and little preparedness for outages in the power n...

For an indoor non-directed line of sight optical wireless communication (NLOS-OWC) system we investigate the optimized Lambertian order (OLO) of light-emitting diodes (LEDs). We firstly derive an expression for the OLO from a conventional Lambertian LED model. Then, we analyze the indoor multi-cell NLOS-OWC channel characteristics including the optical power distribution and the multipath time ...

This paper presents a new variant of broadband Doherty power amplifier that employs a novel output combiner. A new parameter αα is introduced to permit a generalized analysis of the recently reported Parallel Doherty power amplifier (PDPA), and hence offer design flexibility. The circuit prototype of the new DPA fabricated using GaN devices exhibits maximum drain efficiency of 85% at 43-dBm pea...

Power transmission lines routes mapping is an important technique for locating power transmission line routes and towers on mountain/hilltops to assist viewing of their impacts on the environment, operations and allocation of public utilities. A study was therefore conducted to map the power transmission lines within Bukit Lanjan PLUS highway. The main objective of this study is to assess the c...

Power transmission lines routes mapping is an important technique for locating power transmission line routes andtowers on mountain/hilltops to assist viewing of their impacts on the environment, operations and allocation of publicutilities. A study was therefore conducted to map the power transmission lines within Bukit Lanjan PLUS highway. Themain objective of this study is to ass...

The article describes a way of evaluating the power line channel frequency response and input impedance by means of the linear time-invariant (LTI) power line generator. Two possible methods are introduced for the calculation of primary parameters: the first method depends on the physical realization and physical dimension of the cable, and the second method is derived from the data provided by...

The article presents the transients analysis of the substation grounding systems and transmission line tower footing resistances which can affect to the back-flashover (BF) or overvoltage across insulator chain in an HV power systems by using EMTP-RV software. The related transient modeling of the grounding systems is based on a transmission line (TL) model with considering the soil ionization....