Abstract
Ratings of utility-scale grid-tied photovoltaic (PV) inverters are typically no more than 1 MVA. This implies that a large number of inverters are usually installed in utility-scale PV energy-conversion systems. Given the complexity of inverter dynamic models (typical models are high dimension and nonlinear), reduced-order models for inverters are critical for performance assessment and accurate representation of PV-system dynamics in the bulk power grid with limited computational burden. In this paper, we formulate a reduced-order model for parallel- connected grid-tied three-phase PV inverters that has the same structure and model order as a single inverter. We adopt a singlediode model for the PV modules, and each inverter is assumed to be a single-stage dc-ac voltage-source converter with an input dc- link capacitor and an LCL output filter. The control architecture includes a maximum power point tracking (MPPT) algorithm, a dc-link voltage controller, a reactive power controller, a current controller, and a phase-locked loop for grid synchronization. Numerical simulations demonstrate the computational benefits and accuracy of the reduced-order model.
Original language | English (US) |
---|---|
Title of host publication | 2019 IEEE 46th Photovoltaic Specialists Conference, PVSC 2019 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 724-729 |
Number of pages | 6 |
ISBN (Electronic) | 9781728104942 |
DOIs | |
State | Published - Jun 2019 |
Event | 46th IEEE Photovoltaic Specialists Conference, PVSC 2019 - Chicago, United States Duration: Jun 16 2019 → Jun 21 2019 |
Publication series
Name | Conference Record of the IEEE Photovoltaic Specialists Conference |
---|---|
ISSN (Print) | 0160-8371 |
Conference
Conference | 46th IEEE Photovoltaic Specialists Conference, PVSC 2019 |
---|---|
Country/Territory | United States |
City | Chicago |
Period | 6/16/19 → 6/21/19 |
Bibliographical note
Publisher Copyright:© 2019 IEEE.
Keywords
- Maximum power point tracking
- model reduction
- photovoltaic inverter
- three-phase inverter