A Virtual Synchronous Machine Implementation and a Tuning Strategy for its Excitation and Governing Systems
Sabrina de Angeli Souza1; Lucas Frizera Encarnação1; Daniel Carletti1; Marcelo Brunoro2
1 Universidade Federal do Espirito Santo; 2 Instituto Federal do Espirito Santo
doi:10.20906/CPS/SBSE2016-0223
Resumo
The Virtual Synchronous Generator (VSG) consists in a control strategy to make a converter interface between a Distributed Generation unit and the grid operate as a Synchronous Machine. The diffusing utilization of distributed generation units has changed the traditional structure of the power system that is dominated by synchronous machines and centralized power plants. Hence, as these sources have small rotating mass and are poorly damped, the VSG is a solution to improve power grid transient stability. This paper is focused on a VSG implementation and its controller tuning in order to guarantee a proper time domain response. A control design methodology is proposed separately for the voltage and speed controllers based on the location of the system eigenvalues. Finally, to validate the VSG model, its simulations results are compared with the results from an equivalent synchronous generator when the grid is subjected to a few disturbances.
Palavras-chave: Distributed Generation; Grid Stability; Inertia Emulation; Power Electronic Converters; Virtual Synchronous Generator