Research on Adaptive Control of Virtual Synchronous Generator

Virtual synchronous machine technology, which simulates the electromechanical transient characteristics of synchronous generators, enables the power supply or load that adopt a converter with a number of its external characteristics, including inertia, damping, frequency and voltage regulation. With the rapid increase of the installed power capacity using clean energy, traditional virtual synchronous generator technology cannot meet the requirements. Considering the dynamic characteristics of primary source, such as wind energy or solar energy, and influence of the inverter's control strategy on power network frequency, the demand for rotational inertia of power grid under different working conditions as well, combined with adaptive control technology, this paper introduces three adaptive control strategies of virtual synchronous generator. These control strategies can improve the flexibility, scalability and reliability of the virtual synchronous generator.