ORIGINAL RESEARCH article
Front. Energy Res.
Sec. Wind Energy
Volume 13 - 2025 | doi: 10.3389/fenrg.2025.1531338
Research on broadband oscillation characteristics and additional damping control of new energy grid connected systems
Provisionally accepted
- 1State Grid Shanghai Electric Power Research Institute, Shanghai, China
- 2Shanghai University of Electric Power, Shanghai, China
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The large-scale grid connection of new energy sources makes the power system highly electronic. The broadband oscillation problem caused by it is the main challenge facing the safe and stable operation of the current high-proportion new energy power system. In order to ensure the safe operation of the power grid, it is urgent to carry out systematic research on broadband oscillation suppression measures. At present, the method of additional damping controller is often used in broadband oscillation suppression, but the parameter optimization problem for the additional controller of new energy units and flexible DC transmission systems still needs to be deepened. This paper first establishes a state space model of direct-drive permanent magnet wind farms connected to the AC and DC grid systems, and uses eigenvalue analysis to analyze the broadband oscillation modes involved. Then, additional damping controllers are designed for wind turbines and flexible DC transmission systems respectively, and a parameter optimization model is established with the maximum damping ratio of the coupled oscillation mode as the optimization goal, and Improved Plant Growth Simulation Algorithm (I-PGSA) based on cloud model theory with good global search and fast calculation speed is used to optimize and solve the additional damping controller parameters. In addition, considering that adjusting the controller parameters during the optimization process may cause the target mode frequency to change too much, so it is impossible to continue to optimize it, this paper further introduces mode tracking technology to track the target mode to ensure that no target offset occurs during the optimization process. Finally, through eigenvalue analysis and Power Systems Computer Aided Design / Electromagnetic Transients including DC (PSCAD / EMTDC) time domain emulation, the system before and after governance is compared, and it is verified that the proposed controller parameter optimization strategy can effectively suppress the system broadband oscillation problem.
Keywords: direct drive permanent magnet wind turbines, Flexible DC transmission, Broadband oscillation, optimization of damping controller parameters, Pattern tracking
Received: 20 Nov 2024; Accepted: 24 Jul 2025.
Copyright: © 2025 Feng, Du, Zhou, Yang, Pan, Zuo and Yang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Jiaxin Zuo, Shanghai University of Electric Power, Shanghai, China
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