The non-communication dynamic low frequency wind power system (NC-DLFWPS) integrates the flexible low frequency transmission technique and the centralized power conversion technique

which has advantages of low cost

high reliability when applied to medium-to-long distance offshore wind farm

and is easy to provide grid frequency support. Addressing the issue that remote centralized frequency conversion control without communication may be adversely affected by line voltage drop and active power loss

an online calculation method for active power loss and voltage drop based on synchronous rotating phasor calculation is proposed. Based on this

the local control architecture of centralized frequency conversion without communication is modified. The suitability analyses of four types of generators are carried out in response to the characteristics of direct electrical coupling of multiple generators. The advantages of using squirrel cage induction generators in NC-DLFWPS were demonstrated from the perspectives of working principle

multi-generator interaction

and dynamic reactive power demand. Analysis shows that the synchronous generators in NC-DLFWPS may result in severe active power interaction under dynamic discrepant wind speeds

and adding a q-axis damping winding can effectively improve this problem. The SCIGs-based experimental platform is built

which verified the feasibility and superiority of NC-DLFWPS.