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High wind power penetration in power systems will significantly increase risks faced by the conventional generators in the deregulated electricity markets. This will further affect these generators' risk preferences and strategic behaviors. A supply function equilibrium model of electricity markets with wind power is developed taking into account the conventional strategic generators' risk preferences...
With the growing concern regarding climate change, the integration of renewable electric technologies into the grid has taken on increased importance over the past decade. In particular, the integration of wind energy is increasing the attention paid to power transmission investment planning, generation adequacy, and secure system operation. This attention calls for the development of new tools that...
This paper proposes a new control strategy using less number of sensors for variable speed wind energy conversion system (WECS). Maximum Power Point Tracking (MPPT) algorithm, and near unity power factor correction control (UPF) are achieved at the generator side using direct driven Permanent Magnet Synchronous Generator (PMSG). The PMSG operates at variable wind speed connected to a full controlled...
An accurate model of large scale wind farm is demanded for researches about the impacts on the power grid. The total number of wind energy generators is so large that the detailed model of wind farm is computationally prohibitive. Dynamic equivalence can significantly reduce system order with the major characteristics retained. So the aggregation of large scale wind farm is inevitable. An overview...
The 1.5MW half-direct permanent magnet synchronous wind generator with 252 slots, 32 poles is investigated in this paper, and two kinds of generator designs according to permanent magnet embedded in different rotor positions are presented. Based on the fluid mechanics theory, the mathematical models of 3D fluid field that fluid flowing through the outer-surfaces of generators are established, and...
Wind farm integrated in power system in continuous operation will cause the PCC(Point of Common Coupling) of voltage fluctuation and flicker. The wind changes can contribute to the wind turbine output power fluctuations, which can lead to a connection point of voltage fluctuation and flicker reasons. IEC61400-21 gives the wind turbine on the grid power quality requirements and analyses the flicker...
Power flow calculation is an important constituent in power system analysis, it is very necessary to modify the Newton-Raphson power flow Method that can accurately describe the characteristics of wind power in order to obtain accurate calculation results. This paper expands Newton-Raphson power flow method with the wind power, the asynchronous generator and doubly-fed induction generator are discussed...
This paper presents the relevant aspects related to large scale integration of wind power into the power system. Grid integration of WPPs is a technical and economic ability of WPPs to connect and operate within the electric power supply network in a manner which is compatible with the day-to-day operation and short-term security of the electric supply as a whole. WPPs when connected to a weak grid...
To regard environmental protection renewable energy sources especially wind, has been applied to achieve emission reduction goals. While wind generation does not directly produce air pollutants emission, it causes some changes on thermal power generation scheduling which may lead them to produce more air pollutants emission especially during low and medium energy demand periods. So it seems necessary...
Wind Power System connected to electric grid has been increased in the last years. In order to investigate its dynamic behavior and influence into the grid, simulation method can be used to study the performance of overall power systems. In this paper, the Power System in Cape Verde is modeled and simulated with MATLAB/Simulink® considering Wind Farm. The model of wind turbine DFIG, the diesel generator,...
In this paper, a high frequency (HF)-based three-phase Semicontrolled rectifier-current source inverter system is proposed for grid-connected permanent magnet wind generators. The main advantages of the topology are: high efficiency due to less power losses and reduced number of switching elements, high output power density realization, reduced passive component ratings proportionally to the frequency,...
This paper investigates the effect of fixed speed and variable speed grid-connected wind generators on the voltage stability of a power system network. The wind generators considered are the squirrel cage induction generator (SCIG), which is a fixed speed, the doubly-fed induction generator (DFIG) and the direct driven synchronous generator (DDSG) which are variable speed. Studies were conducted on...
Aimed at the fluctuate characteristics of isolated wind power system export voltage and frequency, apply the Space Vector Pulse Width Modulation technology, design the control system of small capacity converter. Build the rectifier and inverter model in Matlab/simulink environment and simulated. The results show that the converter base on the control of SVPWM can dampen the wind power system output...
In this paper the dynamic model for Limit Induced Bifurcation in wind power systems is constructed and used to locate these bifurcation points of wind farms in WSCC-9Bus system. For the sake of system stability, the Limit Induced Bifurcation is investigated under different wind speed conditions. Moreover, the initial condition of an optimal model is calculated through the method of Quasi Steady-State...
This paper aims at the theoretical and experimental analysis of control and energy management of a standalone hybrid renewable energy system comprising wind and photovoltaic sources with battery storage. This system is characterized by a Very Low Voltage (VLV) node connection coupled to DC loads. An average model of a hybrid wind-photovoltaic generating system is proposed in this paper. It is shown...
This work investigates the impact of increased penetration of doubly fed induction generators (DFIGs) on electromechanical modes of oscillations of a large interconnected power system. The work proposes a control mechanism aimed at designing the power system stabilizer (PSS) for a DFIG similar to the PSS of synchronous machines. The wind generator power output is taken as input to the PSS. The active...
Larger percentages of wind power penetration translate to more demanding requirements from grid codes. Recently, voltage support at the point of connection has been introduced by several grid codes from around the world, thus, making it important to analyze this control when applied to wind power plants. This paper addresses the analysis of two different voltage control strategies for a wind power...
This paper summarizes work performed by the WECC Wind Generation Modeling Group and the IEEE Working Group on Dynamic Performance of Wind Power Generation regarding generic Wind Turbine Generator models, their development, and specifications.
Wind energy systems have been emerging as a highly significant solution to the problem of limited traditional energy sources. In this paper, control methodologies adapted to wind energy systems are topically reviewed. oHard computing or control techniques such as proportional-integral-derivative (PID), optimal, nonlinear, adaptive and robust and soft computing or control techniques such as neural...
The main objective of the this study is to determine the optimum size of systems able to fulfill the requirements of remote sites located in Hajer Bani Hameed in the north of Oman, Masirah Island and Mothorah area in the south of Oman. The methodology applied provides a useful and simple approach for sizing and analyzing the hybrid systems using HOMER. The aim is to identify a configuration among...
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