Damping Characteristics of Interconnected Power Systems with Wind-Photovoltaic-Thermal-Bundled Power Transmitted by AC/DC Systems
Publication: Journal of Energy Engineering
Volume 147, Issue 5
Abstract
One of the major ways of delivering renewable energy generation from large-scale energy bases in northeast, northwest, and northern China, is to bundle the power from wind-photovoltaic-thermal units and then transmit it by alternating current/direct current (AC/DC) systems. The interactions among wind power units, photovoltaic (PV) power units, and high voltage direct current (HVDC) systems make the stability of the interconnected power system more complicated. In this paper, a framework model of wind-PV-thermal-bundled power transmitted by AC/DC systems is constructed based on the mathematical models of thermal power units, wind power units, PV power units, and HVDC transmission systems. Considering the fluctuations of wind power outputs and PV power outputs, a small-signal stability model of an interconnected power system with wind-PV-thermal-bundled power transmitted by AC/DC systems is established based on an existing stability theorem. The interactions among various forms of energy and their impacts on wind-PV-thermal-bundled power transmitted by AC/DC systems are studied through theoretical analysis and dynamic simulation. A sample interconnected power system is used to demonstrate the proposed method. It is shown by simulation results that the wind-PV-thermal-bundled power transmission distance; the electrical distance among wind power units, PV power units, and thermal power units; the grid-connected capacities of wind, PV, and thermal power units; and the power loading ratios of AC lines over DC lines all have various degrees of impacts on the stability of the interconnected power system.
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Data Availability Statement
All data, models, and code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work is jointly supported by the National Natural Science Foundation of China (NSFC) (No. 51607158), the Scientific and Technological Research Foundation of Henan Province (No. 202102210305), and the Key Project of Zhengzhou University of Light Industry (No. 2020ZDPY0204).
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Published In
Journal of Energy Engineering
Volume 147 • Issue 5 • October 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Jan 8, 2021
Accepted: Feb 17, 2021
Published online: Jun 22, 2021
Published in print: Oct 1, 2021
Discussion open until: Nov 22, 2021
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