| 引用本文: | 徐虹伟,王炜宇,曹一家,等.基于振荡能量法的构网型变流器振荡特性分析与参数优化[J].电力系统保护与控制,2025,53(19):101-113.[点击复制] |
| XU Hongwei,WANG Weiyu,CAO Yijia,et al.Analysis of oscillation characteristics and parameter optimization of grid-forming converters based on the oscillation energy method[J].Power System Protection and Control,2025,53(19):101-113[点击复制] |
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| 摘要: |
| 构网型变流器能够主动向电网提供惯量、频率支撑，然而其类似同步发电机的外部特性可能使系统振荡特性更为复杂，导致系统中振荡源辨识与控制器参数整定较为困难。为评估构网型变流器接入后系统的振荡特性，提出了一种基于振荡能量法的构网型变流器振荡特性分析与参数优化方法。首先构建了详细的构网型变流器模型及其振荡能量模型，并验证了能量模型的准确性。在此基础上，基于轨迹灵敏度技术量化分析了控制器参数对振荡能量的影响，筛选出影响系统振荡状态的主导控制参数，并据此对构网型变流器的控制参数进行优化整定。最后，在DIgSILENT/PowerFactory中构建了含构网型变流器的四机两区系统仿真模型，刻画了系统中振荡能量的流通路径，验证了振荡源辨识和控制器关键参数辨识的准确性，以及参数整定后构网型变流器振荡抑制的有效性。 |
| 关键词: 构网型变流器 振荡能量 参数优化 轨迹灵敏度 |
| DOI：10.19783/j.cnki.pspc.241624 |
| 投稿时间：2024-12-04修订日期：2025-03-26 |
| 基金项目:国家自然科学基金项目资助(52307077)；湖南省自然科学基金项目资助(2024JJ5015)；国家自然科学基金企业创新发展联合基金项目资助(U23B20128) |
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| Analysis of oscillation characteristics and parameter optimization of grid-forming converters based on the oscillation energy method |
| XU Hongwei1,WANG Weiyu1,CAO Yijia1,YANG Zhilin1,LI Yong2 |
| (1. State Key Laboratory of Disaster Prevention and Reduction for Power Grid (Changsha University of Science
and Technology), Changsha 410114, China; 2. College of Electrical and Information Engineering,
Hunan University, Changsha 410082, China) |
| Abstract: |
| Grid-forming converters can actively provide inertia and frequency support to the power grid. However, their external characteristics, similar to those of synchronous generators, may complicate the system oscillation characteristics, making oscillation source identification and controller parameter tuning more challenging. To evaluate system oscillation characteristics with grid-connected converters, this paper proposes a method for analyzing the oscillation characteristics and optimizing the parameters of grid-forming converters based on the oscillation energy method. First, a detailed model of the grid-forming converter and its oscillation energy model are constructed, and the accuracy of the energy model is verified. Based on this, the influence of controller parameters on oscillation energy is quantitatively analyzed using trajectory sensitivity techniques, allowing for the identification of the dominant control parameters that affect system oscillation state. Consequently, converter control parameters are optimized and tuned. Finally, a four-machine two-area system model with grid-forming converters is constructed in DIgSILENT/PowerFactory. The oscillation energy flow paths within the system are illustrated, verifying the accuracy of oscillation source identification and key parameters recognition, as well as the effectiveness of oscillation suppression after parameter tuning. |
| Key words: grid-forming converter oscillation energy parameter optimization trajectory sensitivity |
