Analysis of the Incidence of Flicker in Power Grid Caused by the Insertion of Residential Wind Generators

Wellington Pascoaline dos Santos

Abstract


This paper discusses the behavior of the voltage in an urban grid, by order of active power for low-power wind generators, based on the observation of the effect of light flicker. To study was used the Matlab Simulink software to simulate the gradual increase of active power delivered to the grid and check the behavior of the electrical system. The software blocks were parameterized with values similar to those found in a dealership network and its effects analyzed according to IEC 61000-4-15. Low-power wind turbines, residential characteristics, used in distributed generation systems were modeled. In the computational study of the proposed system, the turbines were subjected to a torque variation of 10 % depending on the variation of the wind, the critical frequencies of 6.0 and 8.8 Hz, as the limits imposed by the referenced standard. Using the data obtained in the simulation, we calculated the rates of flicker and compared with the limits set by the standard. The results of this study show that, within the parameters used, the inclusion of low-power turbines in the basic distribution network do not bring harm to the voltage quality of the system, and suggests an expansion of studies for distributed generation, referring to the results High Voltage side, and study the impact of the reactive system.

Keywords: flicker; wind turbines; distributed generation.


 


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