To improve the primary frequency response in future low-inertia hybrid power system a fuzzylogic based frequency controller (FFC) for wind farms augmented with energy storage systems(wind-storage system) and intelligent PV farms for the frequency stabilization is proposed inthis paper. Using system frequency deviations the proposed controller provides bidirectionalreal p...

The transmission and distribution systems are essential in facilitating power flow from the source multiple loads over large distances with high magnitudes of voltages currents. Hence, monitoring control various components these structures crucial. Traditionally, this was implemented by sensing only grid current voltage parameters through coils, clamps, or instrument transformers. However, have...

Power system engineers are currently facing challenges to increase the power transfer capabilities of existing transmission system. This is where the Flexible AC Transmission Systems (FACTS) technology comes into effect. With relatively low investment, compared to new transmission or generation facilities, the FACTS technology allows the industries to better utilize the existing transmission an...

This paper explores the use of a Unified Power Flow Controller (UPFC) for global power system control. Coordinated control schemes are assigned to the UPFC, Power System Stabilizer (PSS) and generator excitation to maintain transient stability and voltage stability following a disturbance. The extension to use of UPFC in damping inter-area oscillation is also considered. Under the proposed coor...

this paper presents a new component within the flexible ac-transmission system (FACTS) family, called distributed power-flow controller (DPFC). The DPFC is derived from the uni-fied power-flow controller (UPFC). The DPFC can be considered as a UPFC with an eliminated common dc link. The active power ex-change between the shunt and series converters, which is through the common dc link in the UP...

An application of fuzzy logic based control for power systems governing multiple Flexible Alternative Current Transmission System (FACTS) devices is proposed. Several relations have been derived to determine set points of FACTS devices using fuzzy reasoning in order to meet the requirements for power flows. The relations are based on so called coefficients of influence, which are online adapted...

The paper analyzes the flow calculation of power system, using iterative learning algorithm to calculation the power flow, compare with traditional improving Newton etc. algorithm, Iterative learning algorithm has fast convergence can also be to achieve a high precision tracking. In this paper convergence of the algorithm is global, and gives control of the convergence conditions and rigorous t...

AIMS Stent deployment causes endothelial cells (EC) denudation, which promotes in-stent restenosis and thrombosis. Thus endothelial regrowth in stented arteries is an important therapeutic goal. Stent struts modify local hemodynamics, however the effects of flow perturbation on EC injury and repair are incompletely understood. By studying the effects of stent struts on flow and EC migration, we...

In this paper the performance of unified power flow controller is investigated in controlling the flow of po wer over the transmission line. Voltage sources model is utilized to study the behaviour of the UPFC in regulating the active, reactive power and voltage profile. This model is incorporated in Newton Raphson algorithm for load flow studies. Simultaneous method is employed in which equati...

We propose a Web service architecture for achieving bidirectional XML updating. The update mechanism exploits the power of bidirectioanl transformations so that users can update XML data by editing a view that is generated by some transformation of the XML data. This architecture consists of three tiers: data viewer clients, a bidirectional transformation engine, and some content servers access...