A new approach for harmonic summation using the methodology of IEC 61400-21

This work verifies, by computational simulations, the harmonic aggregation in the point of common coupling (PCC) of some electrical systems that feed wind turbines. Results show that the harmonic summation estimates using the IEC 61400-21 methodology may present significant errors. In this work, we analyze the IEC 61400-21 methodology and propose adjustments to improve the estimations. Using the proposed adjustments, we note that the errors in the estimates are significantly reduced.