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 wind energy generation, utilization and its grid penetration in electrical grid is increasing world wide. The wind generated power is always fluctuating due to its time varying nature and causing stability problem. This weak interconnection of wind generating source in the electrical network affect the power quality and reliability. The localized energy storages shall compensate the fluctuating...
This paper describes an integrated model for a Photon Exchange Membrane (PEM) fuel cell generator including the power conditioning devices that can be used as a micro grid. The main focus here is the development of a detailed model of the fuel cell, power conditioning devices and a Voltage Source Inverter (VSI) with no major assumptions. To this end nonlinear models for PEM fuel cell generator, power...
High penetration levels of distributed photovoltaic (PV) generation on an electrical distribution circuit may degrade power quality due to voltage sags and swells caused by rapidly varying PV generation during cloud transients coupled with the slow response of existing utility compensation and regulation equipment. Fast-reacting, VAR-capable PV inverters may provide the necessary reactive power injection...
This paper presents the analysis, modelling and control model of the electric part of a grid connected photovoltaic generation system. The model contains a detailed representation of the main components of the system that are the solar array, and the grid side multilevel neutral point clamped (NPC) voltage source inverter (VSI). In order to extract the maximum amount of from the photovoltaic generator,...
This paper presents a novel cage induction generator and a mathematical model, through which its behavior can be accurately predicted. The novelty of the generator is due mainly to the constant frequency electricity generation, without an intermediate inverter stage, by a 3-phase cage induction machine operated at varying rotor speeds. The technique uses any one of the three stator phases of the machine...
The aim of this work is to analyze the dynamic behavior of a distributed generator based on gas micro turbine GMT using a grid-connected inverter with an output LC filter. In this paper, we focus, on what happen in case of disturbance on the network which induces a voltage sag on the output LC filter terminal. The proposed control strategy depends on the control of the output LC filter voltage with...
This paper presents the modeling and simulation of a high-speed single-shift micro turbine generation system. This unit has four parts: a compressor-turbine, a permanent magnet generator, a three phases bridge rectifier and inverter. The model is built from the dynamics of each part with their interconnections, and two different control strategies suitable respectively for isolated and grid-connected...
In this paper, a simplified model of a micro-turbine, used as distributed generator, is obtained. The model is suitable for investigating the effects of inverter modulation index on the stability of micro-turbines. The proposed model is built from the nonlinear dynamic model of a micro-turbine and then linearized. The linear model is also simplified. To illustrate the proposed model, a sample micro-turbine...
In a current source converter (CSC) based wind energy system, the dc link current plays an important role in determining the system dynamic performance. This paper proposes two control strategies that can be used to improve the dynamic performance of the dc link current in a CSC wind energy system using permanent magnet synchronous machine (PMSM). State space equations and small-signal models of the...
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.