Abstract: The power system is developing in the direction of "double high" characteristics, which is represented by a high proportion of renewable energy sources and a high proportion of power electronics. Voltage source controlled wind turbine generators (WTGs) have the ability of establishing voltage and supporting the grid voltage and frequency independently and quickly, which contribute to the safe and stable operation of the "double high" power system. Therefore, this paper provides a possible power-side solution for the construction of "double high" power systems. In accordance with the development of voltage source control methods, this paper firstly describes the voltage source control methods for grid-side converters. Then, according to the dual-converter characteristics of WTGs, the applications of voltage source control methods in two mainstream WTGs are summarized, including steady-state frequency response and current-limiting control and transient voltage support under grid faults. And the current status of research on self-synchronization voltage source technology for WTGs are given. Finally, the technical challenges that we will face in the large-scale application of voltage source controlled WTGs are put forward, and the direction of technical research is pointed out.