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This paper aims are improving voltage profile and reducing the losses of active and reactive powers. For simulation purposes, the standard IEEE 14 buses network has been used. Response of the wind turbines in this network should be noted while losing the power network. With regard to the improvement of the voltage profile and reduction of the losses in critical buses, the reactive power resources,...
This paper proposes a probabilistic approach to determine the optimal location, size and power factor of wind parks in power systems. The optimization technique used is the Genetic Algorithm and the proposed method considered the intermittent nature of wind power and load in the system under study. It is important to mention that in most studies wind plants are operated at unity power factor to supply...
The main aim of this paper is to explore the various dynamic controllers for regulating the reactive power requirements of grid connected wind farms. A wind farm of total capacity 7.5 MW is considered for the study. The turbines are of fixed-speed type that are equipped with squirrel-cage induction generators. The emerging devices suggested for the control of the reactive power requirement of wind...
As a matter of fact, there is an ever increasing need for augmenting renewable resources to the existing power system in order to meet its increasing demand. These resources are generally connected to the distribution network, thereby alleviating the stress on the network and also providing the necessary reliability. A distribution network with renewable and fossil-based resources is a micro-grid...
This paper proposes Genetic Algorithms (GA) for solving optimal multi-distributed generation (DG) location and capacity. The objective is to minimize the real power loss within security and operational constraints. Four kinds of DG are considered including distributed real power sources only, distributed real reactive sources only, distributed generation supplying real power and consume reactive power,...
This paper proposes Genetic Algorithm (GA) for solving optimal multi-distributed generation (DG) location and capacity. The objective is to minimize the real power loss within security and operational constraints. Four types of DG are considered including distributed real power sources only, distributed reactive power sources only, distributed generation supplying real power and consume reactive power,...
This paper is discussed the steady-state model of Double Fed Induction Generator (DFIG) and Fix Speed Induction Generator (FSIG). The Wind Turbine Generating Systems (WTGS) buses can be treated as only PQ buses (with P and Q varying across iterations in contrast to a conventional PQ bus where they remain constant)when connected to distribution network. A genetic algorithm considered WTGS is proposed...
An optimal way of real and reactive power management in radial distribution systems with distributed generations (DG) to improve the voltage profile is presented in this paper. Distributed generations effectively reduce the real power loss in radial distribution system compared to other methods of loss reduction and simultaneously improve the reliability of the system. In this paper, a solution methodology...
As the level of wind power penetration into the grid increases, reactive power control will become more critical for wind farms with fixed-speed wind turbine generators. Capacitor banks are used for reactive power compensation in wind power plant (WPP). This paper focuses on our effort to develop a method to determine the number, sizes and control strategy of capacitor banks. To solve this problem,...
Considering the dynamic characteristic of wind farms, especially the wind turbines' output fluctuate with wind speed, the optimal reactive power compensation problem for wind farms is formulated and solved by genetic/tabu search hybrid algorithm (GATS). A mathematical model of reactive power compensation, focused on voltage stability and power losses of wind farms, is developed, and the reactive power...
This paper focuses on designing a closed-loop state feedback controller for a grid-connected wind turbine system including a matrix converter. The system the open-loop system is stable; therefore, the closed-loop controller design objective is to track a class of desired references. The state-feedback controller is designed based on the linear quadratic (LQ) method. A genetic algorithm is used to...
This paper gives a description of a wind generator system composed by a doubly fed induction generator (DFIG), its dynamic model and each one of its subsystems. Also, the control logic that regulates the active and reactive power delivered by the DFIG is described. The electrical control logic is based on stator flux oriented technique and the turbine speed is controlled varying the blade pitch angle...
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