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Operation and Control of a PV Converter with Enhanced Stability Based on Virtual Impedance Emulation in a Pseudo Resistive Grid

Conference ·
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A three-phase grid-connected photo-voltaic converter is investigated to enhance its operational capabilities and stability margins. These converters are generally connected to the grid with an inductive impedance. In this paper the possibility of using a resistive impedance to enhance the stability of the overall system has been investigated. To reduce the losses in the system, rather than using a real resistance, a virtual resistance is emulated inside the control architecture to ensure resistive power transfer between two sources. The stability results with inductive and resistive grids are presented based on the previously reported frequency response. The overall system is modeled via MATLAB/Simulink and several important case study results are presented in this paper to verify the efficacy of the proposed architecture.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
DOE Contract Number:
AC36-08GO28308
OSTI ID:
1992024
Report Number(s):
NREL/CP-5D00-84679; MainId:85452; UUID:65f588f6-dadc-4ff6-ae73-f7b3edbae26f; MainAdminID:69983
Resource Relation:
Conference: Presented at the 2023 IEEE Applied Power Electronics Conference and Exposition (APEC), 19-23 March 2023, Orlando, Florida
Country of Publication:
United States
Language:
English

References (17)

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Negative Virtual Capacitance to Eliminate Resonance Oscillations in a Three-Phase Inverter with LCL Filter conference October 2020
Model-Free Predictive Current Control of a PWM Rectifier Based on Space Vector Modulation Under Unbalanced and Distorted Grid Conditions journal April 2022
Multivector Model Predictive Power Control for Grid Connected Converters in Renewable Power Plants journal April 2022
Self-Synchronizing Stationary Frame Inverter-Current-Feedback Control for LCL Grid-Connected Inverters journal April 2022
Reduce Response Time of Single-Phase Dynamic Voltage Restorer (DVR) in a Wide Range of Operating Conditions for Practical Application journal April 2022
Disturbance Rejection Analysis of a Droop-Controlled DC Microgrid Through a Novel Mathematical Modeling journal April 2022

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Related Subjects

POWER TRANSMISSION AND DISTRIBUTION
grid-forming controls
power control
resistive grid
three-phase grid connected inverter