Wind generator annual energy output estimation considering grid voltage and frequency variations

Abstract

SUMMARYAt present the energy output, for different types of wind turbine generating units (WTGUs), is estimated from either the wind turbine mechanical power output or from its power curve. The power curve of a wind turbine is a graph that gives the power output of the turbine at various wind speeds over which the turbine operates which is generally provided by the manufacturer. The energy output estimated considering the mechanical power output neglects generator efficiency. Although the energy output computed using the electric power output considers the generator efficiency, this method does not take into account the effect of grid voltage and frequency variations on the wind turbine generator efficiency. This paper proposes a method for computing the energy output of the fixed speed wind turbine considering the grid voltage and frequency variations. In this method, the annual wind speed and frequency distribution or their variations are quantized into equal/unequal intervals. The total annual energy output is then estimated by computing the power output of the wind turbine generator for a given average wind speed and frequency.

Universal power line manager for wind turbine generator connected to microgrid

“…In India, the supply frequency increases during the night and falls during the day, and has a distinct drop during peak load hours. Sudden changes in frequency can lead to unacceptable generated power variations (Divya, 2011). To absorb or compensate the active and reactive power produced by the induction generator, we need to consider the relationship between output power and frequency.…”

Universal Power Line Manager for wind turbine generator connected with strong grid

“…In India the supply Frequency increases during night and falls during the day and has distinct drop during peak load hours. Sudden changes in frequency can lead to unacceptable generated power variations [8] .Absorb or compensate the active and reactive power produced by Induction Generator is Relationship between output power and frequency. The grid frequency should be within a range of 47.5 -51.5 Hz.…”