Abstract: Existing measurement devices cannot synchronously monitor the internal electrical quantities of renewable energy stations in real time, and it is difficult to provide data support for dynamic process monitoring, inertia evaluation, frequency control, and other applications of renewable energy stations. Therefore, we propose a synchronized measurement algorithm suitable for renewable energy stations and the development of a synchronized measurement device that can be installed at the outlets of wind turbines. A wide-band fundamental phasor measurement algorithm based on the complex bandpass filter, which extends the fundamental measurement frequency band to 20–80 Hz, was developed to solve the narrow measurement frequency band of the existing synchrophasor measurement algorithm and the inability to track the dynamic process of the renewable energy stations, such as sub/super synchronous oscillation. A broadband measurement algorithm based on fast Fourier transform（FFT） spectral line interpolation fitting was proposed to minimize the barrier effect and spectrum leakage of the FFT. Based on this algorithm, the synchronized measurement device for renewable stations was developed, and the first batch of more than 80 devices have been installed in more than 80 wind turbines of JiHong No. 4 Power Station in Ulanqab, Inner Mongolia. Static, dynamic, and recorded data tests verified the proposed algorithm and developed device.