Abstract
Application of Distributed Generation (DG) to supply the demands of a diverse customer base plays a vital role in the renewable energy environment. Various DG technologies are being integrated into power systems to provide alterna-tives to energy sources and to improve reliability of the system. Power Evacuation from these remotely located DG’s remains a major concern for the power utilities these days. The main cause of concern regarding evacuation is con-sumption of reactive power for excitation by Induction Generators (IG) used in wind power production which affects the power system in variety of ways. This paper deals with the issues related to reactive power consumption by Induc-tion generators during power evacuation. Induction generator based wind turbine model using MATLAB/SIMULINK is simulated and its impact on the grid is observed. The simulated results are analyzed and validated with the real time results for the system considered. A wind farm is also modeled and simulations are carried out to study the various im-pacts it has on the grid & nearby wind turbines during Islanding and system event especially on 3-Phase to ground fault.
Highlights
Wind is one of the most important resources found in nature’s bounty totally free of cost and without any hazardous effects
The waveform of P & Q at the Grid terminals are shown in Figure 10.The waveform of V, I, P & Q at the load terminals are shown in Figure 11.The loading conditions without any reactive power compensation are Load= (750+360j)*3, C1=C2=C3=0
It is found that the requirement of reactive power by Induction generators without compensation is fulfilled by the grid which results in large deviation from the standard voltage values
Summary
Wind is one of the most important resources found in nature’s bounty totally free of cost and without any hazardous effects. Having an insight into the statistics concerning installed wind power capacity,we see that the total capacity as of today is 93,849MW (2008). India stands fourth in wind power commissioning with an installed capacity of 7844.5MW (2008). It instills a hope that the future will be bright with no reliance on conventional sources of energy and wind energy forming a large chunk of the installed capacity. There are two types of utility-scale wind turbines, fixed- and variable-speed. Fixed-speed wind turbines operate at a near constant rotor speed at all times and are directly connected to the power grid [1]. Fixed speed wind turbine which is used here for analysis operates within a very small range (around 5% of the nominal value) and in general they use a fixed shunt capacitor to provide reactive power compensation [2]
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