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Abstract
This paper analyzes the power transfer limitation of the PV power plant under the ultra-weak grid condition, i.e., when the Short-Circuit Ratio (SCR) is close to 1. It explicitly identifies that a minimum SCR of 2 is required for the PV power plant to deliver the rated active power when operating with the unity power factor. Then, considering the reactive power compensation from PV inverters, the minimum SCR in respect to Power Factor (PF) is derived, and the optimized coordination of the active and reactive power is exploited. It is revealed that the power transfer capability of PV power plant under the ultra-weak grid is significantly improved with the low PF operation. An adaptive reactive power droop control is next proposed to effectively distribute the reactive power demands to the individual inverters, and meanwhile maximize the power transfer capacity of the PV power plant. Simulation results of a 200 MW PV power plant demonstrate that the proposed method can ensure the rated power transfer of PV power plant with the SCR of 1.25, provided that the PV inverters are operated with the minimal PF=0.9.
Original language | English |
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Article number | 8119851 |
Journal | I E E E Transactions on Smart Grid |
Volume | 10 |
Issue number | 2 |
Pages (from-to) | 1269-1279 |
Number of pages | 11 |
ISSN | 1949-3053 |
DOIs | |
Publication status | Published - Mar 2019 |
Keywords
- Droop control
- Impedance
- Inverters
- Photovoltaic power systems
- Power generation
- Power system stability
- Power transmission lines
- Power transmission.
- Reactive power
- Reactive power compensation
- Voltage control
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Dive into the research topics of 'Adaptive Reactive Power Control of PV Power Plants for Improved Power Transfer Capability under Ultra-Weak Grid Conditions'. Together they form a unique fingerprint.Projects
- 3 Finished
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REPEPS: REliable Power Electronic based Power System
Blaabjerg, F., Iannuzzo, F., Davari, P., Wang, H., Wang, X. & Yang, Y.
01/08/2017 → 01/12/2023
Project: Research
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Stability of Clustered PV Inverters under Different Grid Conditions
Wang, X., Yang, D. & Blaabjerg, F.
01/04/2016 → 31/03/2017
Project: Research
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HARMONY: HARMONY - Harmonic identification, mitigation and control in power electronics based power systems
Blaabjerg, F., Bak, C. L., Wang, X., Beres, R. N., Kwon, J., Gui, Y., Yoon, C. & Ebrahimzadeh, E.
01/02/2013 → 28/02/2018
Project: Research