The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The impact of wind power generation on the reserve levels has been studied in this paper through the simulation of a one-year daily unit commitment schedule for a benchmark power system. The case study shows that under the hybrid “N-1” plus “ 3σ ” security criterion, there exists a complex relationship among reserve levels, wind penetration and the relative size the conventional units. When such units...
In this paper, the structure that could be applied for the power transmission in non-grid-connected wind power system is proposed. The power transmission system consists of several voltage source converters (VSC) in parallel. The wind power is connected to the high voltage DC lines in Distributed manner, and converted to low voltage by the dc/dc converters in the reception end of the grid. Finally,...
Wind energy has drawn much attention recently due to its competitiveness compared to other renewable sources of energy, as well as its high benefits to the reduction of emissions and to the reduction of the dependency on fossil fuels. In this paper, a stochastic economic dispatch formulation is proposed to incorporate the impact of the variability of wind generation on the ramp rate limits constraints...
In a power system with high wind power penetration, reserve allocation is a major problem of system planning and operation due to the uncertainty and fast fluctuation of wind speeds. In order to achieve long term sustainable solution for electricity supply, the impacts of the installation of wind farms on system reliability have to be carefully studied. This paper describes the impact of installation...
A knowledge based expert system has been designed in order to imitate the decision-making process used by human experts. This expert system has been developed to carry out a pre-feasibility analysis of an energy storage system in an isolated power system, with both wind and diesel generation. Energy storage can be used to optimize the energy from renewable sources and reduce fuel consumption, offering...
The interconnection of wind sources characterized by a significant variability of generated power and the continuous growth of installed power in wind farms raises a number of specific problems both to the utilities and to the power system operator. One of these issues is to ensure the safe operation of the power system when the reduction of the wind generated power occurs. The compensation of not...
The paper tackles the problem of the optimal sizing of a power system at the planning stage-that consists in the best choice among many alternatives-as a function of reliability and maintenance, both encompassed in the availability function of the system. Moreover, statistical methods to deal with uncertainty of such parameters are also discussed and illustrated with reference to typical values of...
This paper presents a formulation of security-constrained unit commitment (SCUC) problem with emphasizing on wind power and compressed air energy storage (CAES). In past years, a fast growth in development of wind generation has been experienced in power system, due to many factors including environment and depletion of other resources. With increasing installed wind capacity the intermittency issues...
This work shows a simple method to damp oscillations using Wind Power System Stabilizer applied to three wind parks. The proposed control is evaluated performing several simulations on modified version of 10-generator, 39-bus New England power system. The simulation represent a three-phase short-circuit, and the design control system is applied with different gains. The coordination of the wind power...
Based on simplified RX model of asynchronous generator, state estimation model containing wind generators is presented in this paper. Simplified RX model can be merged into traditional state estimation algorithm efficiently with the consideration of asynchronous generator and the impact of wind generators on power system state estimation is investigated. Compared with traditional RX model, the calculation...
With the increasing levels of wind generator penetration in modern power systems, one of major challenges in the present and coming years is the optimization control, such as optimal power flow including wind farms. The power flow model for a fixed speed wind generator (FSWG) system and a variable speed wind generator (VSWG) system is discussed respectively. The expectation model of wind generators'...
The small-disturbance voltage stability of a grid-connected wound-rotor induction-generator (WRIG) wind-turbine system is analyzed under different operating conditions. This theoretical study shows the effect of the wound-rotor induction generator and its parameters on load-bus voltage collapse phenomena. Results show that the rotor resistance of the induction generators may decrease the system voltage...
The paper summarizes conclusions following from the research of utilization of wind power plants in the Czech Republic. Situation in the planned and real shares of renewable sources with more detailed specification of the opportunities for development of wind power plants is described specifically. The paper also presents the results of analysis of operational statuses of the most frequently used...
It is essential to investigate the effects which will produce on the power system when wind generators are introduced. The paper describes the steady model of wind turbines with an asynchronous generator. Based on the conventional RX model, power system state estimation containing wind generators is proposed. The slip of the asynchronous generator is utilized for the formation of expanded correction...
Large number of wind turbines are being installed and connected to power systems. In some countries or networks, the penetration level of wind power is significant high so as to affect the power system operation and control. Consequently, the stable operation of wind turbine systems is very important for power system stability. This paper studies the effect of STATCOM on stability improvement of a...
Wind power energy is a renewable resource which is clean without pollution. The early research on wind power energy mainly focused on the on land utilization. The application on the sea is infrequent. Much less to find the application on the ships and offshore structures. Based on the fact that the energy crisis becomes more and more severe, this paper puts forward the idea to install wind power generation...
Nowadays, wind generation is developing in the whole world. In conformity with the Romanian present regulations, the wind energy producers must obtain the technical interconnection approval, which consists in the documents presented to the transmission grid operator: an interconnection study for the wind turbines, urbanism certificate, and the property certificate. As the wind turbines are increasingly...
During recent years, the size of individual wind turbines has grown closer to 10 MW, and the size of wind power plants has increased significantly to 300 MW or more. This growing size of wind power generation requires that careful evaluation of transient stability of the overall grid should be undertaken. This paper attempts to investigate the impact of wind power plant penetration on the transient...
Dispersed power generation systems are expected as important electric power supply systems for the next generation. Wind power generation system (WPGS) is widely being introduced in the worldwide power utilities. The WPGS output power fluctuates due to wind speed variations. Hence, if a large number of wind power generators are connected to the grid system, their output can cause serious power quality...
Wind energy has taken off into a new peak in terms of its popularity among other new generation technologies. The socio-economic and environmental benefits impact the general population. A low cost of energy along with grid compatibility can be achieved due to mass production technology, power electronics advancement, and intelligent controllability. This paper attempts to shed the light on many aspects...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.