Parallel interleaved converters for high power renewable energy systems present stability issues at the LCL resonance frequency. A multisampled measurement and filtering strategy is proposed to stabilize the system based on the capacitor voltage derivative active damping, overcoming its limitations for low switching power converters. The effects of the delays on the stability of the active damping strategy would be analysed. The solution developed is robust against grid inductance variations, ensuring the fulfilment of the stringent harmonic grid codes. The authors gratefully acknowledge Ingeteam Power Technology and the Spanish Ministry of Economy and Competitiveness under grant DPI2013-42853-R and DPI2016-80641-R for its financial and ongoing support. This work was partially funded by the Public University of Navarre through a doctoral scholarship.