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.
With increasing rare earth prices and the claim for cost effectiveness of electrical drive trains especially induction generator solutions might turn into focus as preferable alternative to permanent magnet synchronous generators, even in spite of the lower power density. But an induction generator requires reactive power either provided by capacitors or by a self commutated power converter to ensure...
The doubly fed induction generators (DFIGs) are used in almost 50% of the offshore and onshore wind power plants. The DFIGs offer advantages compared to fix speed induction generators. The DFIGs are sensitive to grid voltage disturbances and require additional protection for the rotor side power electronic converter, like crowbar protection. In the present paper two active crowbar topologies are compared,...
In this paper, an attempt has been made to predict the performance of grid connected induction generator (GCIG) due to different nature of grid faults. MATLAB/Simulink model for the power network as developed along with three phase induction machine model is used to observe the effects of faults on the transient performance of SCIG. Simulation result as obtained are found to be useful to predict the...
This paper presents the findings of investigation of decoupled power control of grid-connected doubly fed induction generator (DFIG) based on Adaptive Back Stepping Control (ABSC) technique. The Adaptive Back Stepping control technique offers a systematic stabilizing procedure wherein unwanted cancellation of favourable nonlinearities can be avoided. Incorporation of the proposed controller improves...
A new method to evaluate the steady state performance of a three-phase self excited induction generator based on conductance minimization is proposed. It can be simply used to take series compensation into account. Among the priorities of this method are the absence of convergence problem and flexibility. Simple methods to find the frequency and magnetizing reactance have been proposed. Simulation...
In order to investigate the transient response of doubly fed induction generator (DFIG) under grid disturbances, an accurate model is required. In this paper transient response of DFIG during voltage sag considering saturation effect of leakage flux for different order models is simulated. It's shown that if the saturation effect is neglected, simulation result display less current than real one....
A new method to evaluate the steady state performance of a three-phase self excited induction generator based on conductance minimization is proposed. Among the priorities of this method are the absence of convergence problem, flexibility and the ability to be augmented to RC loads and loads with compensation. Simple methods to find the frequency, magnetizing reactance and minimum required capacitance...
The use of slip-ring induction machines for isolated distributed generation is investigated. By varying the effective rotor resistance of a self-excited slip-ring induction generator (SESRIG), the magnitude and frequency of the output voltage can be controlled under variable-speed operation. Analysis of a SESRIG supplying isolated single-phase loads is presented. Practical implementation using a chopper-controlled...
The steady-state performance of the variable speed constant frequency double output induction generator (VSCF-DOIG) is investigated. The generator is subjected to a strict control strategy in which the stator current is kept constant and equal to its rated value. This allows the generator to deliver rated power from its stator terminals, while from its rotor terminals a variable power output is obtained...
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.