Wind farms are generally located far away from load centers and, to increase the power flow, series capacitors are normally installed to compensate the transmission line reactance. The interaction of the series capacitor with the wind system can cause undamped sub-harmonic (below 60 Hz or 50Hz system frequency) current and voltage oscillations, which can cause serious damage to wind turbine con...

A flat roof surface is known to be subjected to unusually high suction associated with a pair of vortices created under diagonally skewed wind. Prediction of the wind load and its influence on the roof system is an important engineering topic but wind tunnel testing of this situation is not easy with a scaled model. Considering the physics of wind flow for the most critical case, a possibility ...

The paper presents a concept of utilizing wind farms in a process of voltage control in 110 kV distribution grids. It has been shown that when properly controlled, a wind farm can assist in decreasing voltage variations in a HV grid caused by daily load variations.It has been also shown that stabilization of HV grid voltage caused by the influence of a wind farm is reflected with decreased freq...

The use of disturbance models in wind turbine individual pitch control design to attenuate effects of persistent disturbances is investigated. Previous work has used individual pitch control and disturbance models to design controllers that reduce the blade loads at the frequencies associated with the rotor speed. This paper takes a similar approach of using a disturbance model within the H∞ de...

This paper proposes a hybrid optimization method for optimal allocation of wind turbines (WTs) that combines genetic algorithm (GA) and market-based optimal power flow (OPF). The method jointly maximizes net present value (NPV) related to WTs investment made by WTs’ developers and social welfare (SW) considering different combinations of wind generation and load demand over a year. The GA is va...

Electrical energy concurrent which cannot be stored so must be utilized as soon as it is generated. Therefore it requires an effective balance of power flow within multi area power system. This paper studies about a two area system [Hydro power plant & PMSG based Wind energy conversion system] which is connected through a tie line. Due to the rapid fluctuation in the wind power it causes distur...

The offshore wind power has received immense attention because of higher wind speed and lower opposition for construction. A wide range of combinations of high-voltage ACDC transmission have been proposed for integrating offshore wind farms and long-distance power transmission. This paper is to model such hybrid AC-DC systems including the interfacing converters, which have several control para...

The dynamic wind loads are considered in terms of equivalent static wind load based on gusteffect factor in most of the current design practices. In ASCE 7-05, the equivalent static wind load is based on the gust-effect factor f G which corresponds with the displacement at the highest point of the structure for flexible or dynamically sensitive structures. Gust-effect factors are calculated dir...

This paper discusses the performance of various intelligent control schemes in extracting maximum wind power using doubly fed induction generator (DFIG). Intelligent control scheme such as fuzzy, neuro-fuzzy, and genetic algorithm based fuzzy controllers are applied for pitch control of DFIG based wind generation system. Wind generation system with eight numbers of identical 1.5MW wind generato...

This paper describes a new methodology for grid expansion planning considering the probabilistic reliability of a composite power system including wind turbine generators (WTG). The proposed model includes capacity limitations and transmission line unavailability. The importance of renewable energy sources has been growing at a rapid rate due to environmental concerns. In particular, wind energ...