Z-source Virtual Synchronous Generator: Operation and Control

• Published in: Conference proceedings - IEEE Applied Power Electronics Conference and Exposition pp. 97 - 104
• Main Authors: Khatibi, Mohammad, Ahmed, Sara
• Format: Conference Proceeding
• Language: English
• Published: IEEE 14.06.2021
• Subjects: Generators; Heuristic algorithms; Impedance-source inverter; low voltage ride through; photovoltaic (PV) systems; Reactive power; Synchronous generators; Systems operation; virtual synchronous generator; Voltage source inverters; Wind power generation
• ISSN: 2470-6647
• DOI: 10.1109/APEC42165.2021.9487373

Due to the increasing penetration level of inverter-based distributed generators such as photovoltaic and wind systems, the power electronics inverters need to provide ancillary services such as frequency and voltage regulation by means of controlling active and reactive power. In the proposed Z-source Virtual Synchronous Generator in this paper, virtual synchronous generation control is hired to increase the stability margin and track the rated frequency of the system. The added inertia to the system will prevent the protection relays from tripping by improving the rate of change of frequency. Also, a low voltage ride through control method had been considered in which during a grid fault condition, the system provides reactive power to reestablish the grid voltage, based on the grid codes and requirements. The aforementioned control algorithms are implemented on a single-stage impedance-source inverter due to its fast dynamic and efficient behavior compared to the conventional two-stage voltage source inverter. The proposed system operation is verified experimentally in OPAL-RT real-time simulator.