Abstract
Grid frequency support, e.g., by the virtual inertia control (VIC), of photovoltaic (PV) systems, is more demanded than ever before. To achieve the full-range frequency support (i.e., to tackle the under- or overfrequency issues), the power reserve is necessary for PV systems. Accordingly, a power reserve control (PRC) method based on the maximum power point tracking (MPPT) is adopted in this article, referring to as MPPT-PRC. It measures the real-time maximum available power (MAP) periodically, being independent of physical sensors and burdensome computation. However, the MAP measurement loop inevitably couples with the power reserve loop, which makes the realization of the VIC challenging. Aiming at this issue, an event-triggering strategy is elaborately designed to switch the PV system in-between different operating modes. The strategy is realized by a set of control signals. They are responsible for the detection of frequency incidents, the activation of MPPT, the measurement of MAP, respectively. Consequently, the VIC can be achieved based on the MPPT-PRC without any conflicts or instability. Experimental tests are performed on StarSim real-time hardware-in-the-loop system to validate the proposed MPPT-PRC-based VIC, as well as the coordination of the control loops.
| Original language | English |
|---|---|
| Article number | 9431708 |
| Journal | IEEE Transactions on Industry Applications |
| Volume | 57 |
| Issue number | 4 |
| Pages (from-to) | 4059-4070 |
| Number of pages | 12 |
| ISSN | 0093-9994 |
| DOIs | |
| Publication status | Published - 1 Jul 2021 |
Bibliographical note
Funding Information:Manuscript received July 12, 2020; revised November 19, 2020 and March 2, 2021; accepted May 6, 2021. Date of publication May 14, 2021; date of current version July 16, 2021. Paper 2020-SECSC-1050.R2, presented at the IEEE Applied Power Electronics Conference and Exposition, New Orleans, LA, USA, Mar. 15–19, 2020, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Renewable and Sustainable Energy Conversion Systems Committee of the IEEE Industry Applications Society. This work was supported by the VELUX Foundations under the Villum Investigator under Grant REPEPS 00016591. (Corresponding author: Yongheng Yang.) Qiao Peng and Tianqi Liu are with the College of Electrical Engineering, Sichuan University, Chengdu 610065, China (e-mail: qpeng@scu.edu.cn; tqliu@scu.edu.cn).
Publisher Copyright:
© 1972-2012 IEEE.
Keywords
- Event triggering
- frequency regulation
- maximum power point tracking (MPPT)
- photovoltaic (PV) system
- power reserve
- virtual inertia control (VIC)