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In almost all European countries, the penetration of wind power systems and the wind turbines size continuously increases. Therefore, the grid code requirements are more and more restrictive concerning the necessity that the wind turbine to remain connected to the grid during a fault situation. This paper analyzes the possibilities to have more accurate wind generation transient stability models for...
In recent years, environmental problems are becoming serious and renewable energy systems, especially wind power generation, have attracted much attention and been introduced into power systems. However, wind power generator output is intermittent, resulting frequency fluctuations in the connected power system. A doubly fed induction generator (DFIG) based diesel generation system is proposed in this...
In recent years, there has been a large increase in power demand without corresponding increase in power generation. With the issues around global warming, the use of renewable energy such as wind and solar has gained popularity. Renewable energy is clean, sustainable (will never run out), environmentally friendly. In addition, it requires a relatively low maintenance and running costs. Many countries...
The Static Synchronous Series Compensator (SSSC) consists two proportional integral (PI) controllers, AC voltage regulator and DC voltage regulator. The gains values of these PI controllers play an important role in performance of SSSC. The optimization technique is used to obtain the optimal values of these gains under single objectives or several objectives. Most of control problems consist of several...
This paper outlines the advantages and the disadvantages of the most commonly generator used in Wind Energy Conversion Systems (WECS). The state of art on wind turbine technology is established by comparison of each type. Doubly Fed Induction Generators (DFIG), Squirrel Cage Induction generators (SCIG) are the two types of induction generators commonly used for geared operation in WECS in variable...
In power systems voltage stability is a key issue which attracts worldwide attention. This research presents an implementation of a modified IEEE 14 bus system model in Power System Analysis Toolbox (PSAT) — free and open source software. A newly developed Squirrel Cage induction generator (SCIG) and Doubly Fed Induction Generator (DFIG) wind turbine model are modeled and connected to a modified IEEE...
Voltage stability issue is a key problem which attracting worldwide attention because voltage stability may leads to voltage collapse. This paper investigates the impact of Squirrel Cage induction generator (SCIG) and Doubly Fed Induction Generator (DFIG) on the power system small signal stability. Here considered wind generators are SCIG which is fixed speed and DFIG is variable speed. Small signal...
Nowadays, the proportion of wind turbines and the dimensions of wind plants have increased significantly all over the world. This paper describes a comparison of the power quality for wind power systems based on three different popular wind generators: the squirrel-cage induction generator (SCIG), the doubly-fed induction generator (DFIG) and the permanent-magnet synchronous generator (PMSG). Although...
In this article we have studied transient system of the squirrel cage induction generator, we will establish the modeling of wind turbine and present different topologies that exist in the literature with a focus on their application in fixed speed realized with squirrel cage induction generator SCIG. We have tried to connect the SCIG directly to the grid without starting technical by circuit breaker,...
This paper deals with the analysis, modeling, and control of a doubly-fed induction generator (DFIG) driven by the wind turbine. A control technique is presented for extracting the maximum power from the wind turbine. The wind energy conversion system (WECS) is equipped with a DFIG and two back-to-back connected voltage source converters (VSCs) in the rotor circuit. The proposed control technique...
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