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Title: Coordinative low-voltage-ride-through control for the wind-photovoltaic hybrid generation system
Authors: He, Y 
Wang, M 
Xu, Z 
Issue Date: Jun-2020
Source: IEEE journal of emerging and selected topics in power electronics, June 2020, v. 8, no. 2, p. 1503-1514
Abstract: The wind-photovoltaic (PV) hybrid renewable energy system (HRES), which consists of permanent-magnet synchronous generators (PMSG) and PV arrays, is becoming a cost-effective electric source for powering islanded areas. However, high penetration of renewables makes the power system vulnerable to transient voltage faults, which undermines the stability of the future inverter-dominated grid. To address this issue, a coordinative low-voltage-ride-Through (LVRT) control scheme is proposed for the operation of the wind-PV HRES in this article. This control scheme will exploit the maximum energy inertia of the HRES for incorporating the power imbalance between the faulted grid and the renewable generators. An optimization problem is formulated to maximize the renewable energy harvesting within the operational and environmental limitations. To cope with different working conditions, four control processes are coordinated in an optimized manner during the LVRT period: 1) adaptive dc-link voltage control; 2) PMSG rotating speed control; 3) PV energy curtailment control; and 4) blade pitch angle control. Besides, this control scheme applies a direct output control that can generate stable and accurate current as per grid code requirements. The results of the hardware-in-The-loop (HIL) experiment and the MATLAB/Simulink simulation are provided to verify the effectiveness of the proposed control scheme.
Keywords: Hybrid renewable energy system (HRES)
Low-voltage-ride-Through (LVRT)
Power system faults
Smart grid
Publisher: Institute of Electrical and Electronics Engineers
Journal: IEEE journal of emerging and selected topics in power electronics 
ISSN: 2168-6777
DOI: 10.1109/JESTPE.2019.2958213
Rights: © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
The following publication Y. He, M. Wang and Z. Xu, "Coordinative Low-Voltage-Ride-Through Control for the Wind-Photovoltaic Hybrid Generation System," in IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 8, no. 2, pp. 1503-1514, June 2020 is available at https://dx.doi.org/10.1109/JESTPE.2019.
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