United Arab Emirates grid forming statcom

How stable is a wind power plant with Statcom in grid-following and grid-forming modes?

The stability behaviors of wind power plant with STATCOM in grid-following and grid-forming modes are compared. Grid-forming STATCOM provides more stability margin to wind power plants than grid-following STATCOM. In weak grids, grid-forming STATCOM gives a nearly tenfold rise in damping ratio to wind power plants in comparison with GFL control.

Does alternating voltage control of Statcom benefit from GFM mode?

This conclusion holds true for most conditions with properly designed parameters, including different bandwidths of the alternating voltage control of STATCOM in 1∼10 Hz and phase-locked loop of grid-following STATCOM ranging from 5 to 100 Hz, which is benefited from the sufficient stability margin of GFM mode.

Is GFM-STATCOM suitable for weak grid stabilization of WPP?

As for GFM in case III, it not only provides sufficient stability margins in all conditions, but also showcases an interesting opposite behavior as GFL, i.e., the stability is enhanced as SCR reduces in this certain range, which makes GFM-STATCOM especially suitable for weak grid stabilization of WPP. Fig. 11.

Why do we need a battery for STATCOM in GFM mode?

The batteries make it possible for STATCOM in GFM mode with the active power-dependent ancillary services, e.g., frequency response. All studies hereafter are based on the STATCOM with batteries installed at dc-link as shown in Fig. 1.