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• The paper describes our recent research and study activities for a joint project with New York Power Authority (NYPA) and New York State Energy Research and Development Authority (NYSERDA). • One goal of the project is to use closed-loop control device, multi-band power system stabilizers (MBPSS), in the New York power grid (NYPG) to improve its dynamic stability performance including primary frequency and inter-area oscillatory control. • This paper is primarily focused on the frequency control. • The study results show that with a small number of selected controllable assets only operated by NYPA, including WGs, MBPSS effectively improves the dynamic performance of NYPG and even of the Eastern Interconnection as a whole. This paper provides a very detail-oriented study to prepare a full pathway for applying the technology of multi-band power system stabilizers (MBPSS) to a large industrial interconnection-level power system, the Eastern Interconnection network, with a few selected controllable assets of New York Power Authority (NYPA), including wind generations to improve dynamic stability performance with the emphasis on primary frequency control. The detailed methodology to identify the most effective control devices is outlined. Coordinated tuning of MBPSS is performed. The impact of different wind generation levels on the frequency control is demonstrated. The results show that the technology of the advanced closed-loop control with a limited number of NYPA assets improves the dynamic stability performance of the New York power grid and even of the Eastern Interconnection as a whole. Evaluation of the economic benefit from frequency improvement is analyzed. [ABSTRACT FROM AUTHOR]