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The number of doubly fed induction generators (DFIGs) has been grown in recent years because of its merits. They play an important part of the total amount of wind generation. On the other hand due to proliferation of utilizing non-linear loads in power system, power quality problems like harmonics, voltage sag/swell, etc outbreak. These problems have destructive effect of performance of DFIG. To...
With the development of modern wind energy generation, higher requirements to the grid in case of a failure were raised. In order to faciliate the recovery of power, while voltage dips in a certain range, protecting the rotor side converter and providing reactive power to the grid are both needed according to the requirements. This paper takes DFIG for example, in order to protect the rotor side converter,...
This paper deals with an implementation of an electronic load controller (ELC) using a digital signal processor (DSP) for regulating the voltage and frequency of an offgrid induction generator system (IG) that can supply electricity in remote areas of countries with high year-round rainfall. The proposed generating system consists of IG, ELC and nonlinear consumer loads. The ELC is combination of...
Three phase electrical machines are normally exposed to lowered levels of supply voltage quality conditions which can appear simultaneously due to voltage disturbances of overvoltage or undervoltage, voltage unbalance and voltage waveform distortions. These voltage disturbances can cause effects of seriously overheating winding insulation resulting in degradation and reduced lifespan of the machines...
Battery Energy Storage System (BESS) is used for load compensation of a permanent generator synchronous generator driven by diesel engine to enhance its performance. The control of BESS with capabilities of reactive power, harmonics and unbalanced load compensation is achieved by indirect current control scheme. The modeling of the DG set is performed using permanent magnet synchronous generator (PMSG)...
High-tech drive control needs high quality of electrical energy like safe, continuous voltage supply with the required current at constant rms values and at constant frequency, then pure sinusoid waveform of voltage. If the rated voltage impressed to the computers in control systems will be decreasing to its 75% the disturbance in their operation appears and at 50% they all will loose their ability...
A new control technique is presented for the AC grid connection of distributed generation and parallel-connected inverters. The proposed control technique is based on a modification of the power angle droop control method and uses only locally measured feedback signals. An improvement in transient response, including large step transients, is achieved since the coupling filter parameters are taken...
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