Virtual Inertia Implemented by Quasi-Z-Source Power Converter for Distributed Power System

Virtual Inertia Implemented by Quasi-Z-Source Power Converter for Distributed Power System

Blog Article

This paper proposes a novel virtual inertia control strategy for distributed power systems with high penetration of renewable energy sources.The strategy uses a quasi-Z-source power converter to emulate the inertia response of a synchronous generator by regulating the DC-link capacitor voltage in proportion to the grid frequency deviation.This paper analyzes the effect of inertia on the frequency regulation of a single-area power system and derives the parameter design method and limitations of the virtual inertia.

The paper also introduces the working principle Bowl (Set of 2) and modulation technique of the quasi-Z-source power converter and presents the virtual inertia control scheme based on a voltage-frequency controller.The paper verifies the feasibility and effectiveness of the proposed strategy through MATLAB/Simulink simulations and dSPACE semi-physical experiments.The results show that the proposed strategy can reduce the frequency deviation and rate of change of frequency (RoCoF) by 20% and 50%, respectively, under load disturbances.

The paper Shorts demonstrates that the quasi-Z-source power converter can provide flexible and adjustable virtual inertia for distributed power systems without additional energy storage devices.