Capacitor voltage synchronising control-based VSG scheme for inertial and primary frequency responses of Type-4 WTGs

Capacitor voltage synchronising control-based VSG scheme for inertial and primary frequency responses of Type-4 WTGs

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This study proposes a capacitor voltage synchronising control-based virtual synchronous generator (CVS-VSG) scheme for the inertial and primary frequency responses of type-4 wind turbine generators (WTGs) in wind power-dominated power systems. The CVS-VSG scheme is realised on type-4 WTGs based on the equations of motion of capacitor voltages. The type-4 WTGs are controlled as VSGs to emulate the inertial and primary frequency responses of conventional SGs. Active load sharing between Type-4 WTGs is achieved by a governor with capacitor voltage droop characteristics. Modal analysis was carried out on a test system with 73.58% wind power penetration. Simulation studies were undertaken to evaluate the performance of the CVS-VSG scheme on the test system subject to large disturbances.


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