Control of a Three Phase Inverter Mimicking Synchronous Machine with Fault Ridethrough Capability
Due to high penetration of renewable energy systems in the distribution grid, it has become an extreme challenge to maintain synchronous stability of the grid. During asymmetrical faults the major challenge is to limit the inverter current and keep it within limits so that the inverter relay does not trip. Such a control methodology ensures seamless power to the consumers without damaging the inverter. In this paper a second order generalized integrator based inverter control operating like a virtual synchronous machine is proposed. The calculations for the inverter control states are performed on a per phase basis and the control algorithm is developed. The dynamic equations describing the proposed control algorithm with its analyses is presented in this paper. Numerical simulations based on MATLAB/Simulink are performed to verify the efficacy of the proposed control technique on a three phase grid connected inverter.
V. R. Chowdhury et al., "Control of a Three Phase Inverter Mimicking Synchronous Machine with Fault Ridethrough Capability," Proceedings of the 9th Annual IEEE Green Technologies Conference (2017, Denver, CO), pp. 1-6, Institute of Electrical and Electronics Engineers (IEEE), Mar 2017.
The definitive version is available at https://doi.org/10.1109/GreenTech.2017.6
9th Annual IEEE Green Technologies Conference (2017: Mar. 29-31, Denver, CO)
Electrical and Computer Engineering
Keywords and Phrases
Couplings; Electric Fault Currents; MATLAB; Phase Locked Loops; Reactive Power; Renewable Energy Resources; Synchronous Machinery; Active Power; Phase Locked Loop (PLL); Point Of Common Coupling (PCC); Secondorder Generalized Integrator (SOGI); Three-Phase Inverter; Virtual Inertia; Electric Inverters; Line To Ground (LG) Fault; Second Order Generalized Integrator (SOGI); Line to Ground (LG) Fault; Point of Common Coupling (PCC); Three Phase Inverter
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