Abstract
Recent power curtailment-based photovoltaic (PV) flexible power point tracking (FPPT) algorithms mainly adopted intricate curve fitting or sophisticated curve-scanning mechanisms to ensure the grid supportive functionalities under partial shading conditions (PSCs), showing the limitations of mathematical solidity or system dynamics improvement. Accordingly, a novel fast-speed partial-shading-tolerant FPPT (PST-FPPT) algorithm is proposed in this article. Regarding the proposed scheme, a modified explicit PV model is developed to express the key operation points with the assistance of several representative current-voltage samples from the initialization process, which is beneficial to computational burden reduction and irradiance sensors removal. Additionally, to guarantee the tracking speed to system dynamics, a set point estimation-based direct voltage regulation strategy is proposed in this article, eliminating the redundant searching in approaching the predefined power command. Simulation and experimental evaluations under various PSCs and operational circumstances validated the effectiveness of the proposed control.
| Original language | English |
|---|---|
| Pages (from-to) | 466-485 |
| Number of pages | 20 |
| Journal | IEEE Transactions on Sustainable Energy |
| Volume | 15 |
| Issue number | 1 |
| Early online date | 17 Aug 2023 |
| DOIs | |
| Publication status | Published - Jan 2024 |
Keywords
- Complexity theory
- Estimation
- Flexible power point tracking
- grid support
- Heuristic algorithms
- key
- Photovoltaic systems
- Power system stability
- System dynamics
- Voltage control
- key points estimation
- partial shading
- photovoltaic system
