Improved virtual synchronous generator control to analyse and enhance the transient stability of microgrid

Abstract

In recent years, the integration of renewable energy resources (RESs) into the power system is growing rapidly, and it is necessary to analyse and evaluate the effect of RES on transient stability of the power system. In this study, centre of inertia (COI) concept is implemented to analyse and evaluate the integration effects of an auxiliary damping control-based virtual synchronous generator (VSG) consisting an improved governor. The impact of VSG integration is divided into synchronous generator (SG) linked parts and COI associated parts. Due to VSG integration into the power system, the significant elements which disturb the COI dynamic motion and rotor dynamics of SG are examined in detail. Different cases are considered to evaluate the effectiveness of the proposed method, i.e. VSG's different integrating location and different power capacities. It is observed in simulation results that COI dynamic motion and rotor dynamics of SG are positively affected by VSG integration, and transient stability improves significantly.

Virtual generator‐based damping controller for microgrids with low inertia resources based on energy storage systems

“…In the case of high PE penetration, this results in a low inertia problem for dynamic stability of inter‐connected systems. Actually, the main issue is related to zero‐inertia inverter‐based resources which have replaced high‐inertia synchronous generators in modern microgrids 1 . This situation deteriorates the system frequency and voltage response and leads to improper performances for conventional frequency and voltage controlling systems.…”

“…In an appropriate scheme, by using ESSs dispatched in the microgrid system, it is possible to provide proper damping power and control the microgrid frequency deviations. For this purpose, there are different research studies in the literature concentrating on the influence of low‐inertia sources on microgrid frequency stability 1,2,5,6 . However, the damping performance of additional controlling schemes such as distributed generators (DGs) in low inertia microgrids with high‐level inverter‐based resources have not been broadly addressed in the Reference 1.…”

“…For this purpose, there are different research studies in the literature concentrating on the influence of low‐inertia sources on microgrid frequency stability 1,2,5,6 . However, the damping performance of additional controlling schemes such as distributed generators (DGs) in low inertia microgrids with high‐level inverter‐based resources have not been broadly addressed in the Reference 1. Conducted researches through recently published papers indicate that the use of ESSs as an additional controlling scheme has been properly investigated 7‐14 .…”

A Novel Algorithm for MPPT of an Isolated PV System Using Push Pull Converter with Fuzzy Logic Controller

“…Furthermore, in Ref. [24], the center of inertia technique is used to evaluate the performance of an electronic inverter-based PV power system. However, these techniques have shortcomings including an inability to track continuous power and oscillations near the maximum point.…”

Pre‐filter phase‐locked loop: principles and effects with inter‐harmonic perturbation

“…Voltage source inverters (VSIs) are key components that have become prevailing in grid-integrated renewable energies and flexible power transmission systems [1][2][3]. The accurate extraction of fundamental frequency and phase of grid voltage is important to ensure stable operation for VSI.…”