虚拟同步机稳定性分析及其参数自适应调节策略研究  

Stability analysis of virtual synchronous generator and its parameter adaptive adjustment strategy

作　　者：尹军 克帕依吐·吐尔逊 支志远 马美玲 YIN Jun;KEPAIYITULLA Tursun;ZHI Zhiyuan;MA Meiling(Xinjiang Electric Power Research Institute of State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 841100,China;School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]国网新疆电力有限公司电力科学研究院,乌鲁木齐841100 [2]上海理工大学机械工程学院,上海200093

出　　处：《上海理工大学学报》2024年第5期494-501,共8页Journal of University of Shanghai For Science and Technology

基　　金：国家自然科学基金资助项目(51777126);上海市青年科技英才扬帆计划(22YF1429500)。

摘　　要：针对新型电力系统弱电网特性面临的安全稳定挑战,提出一种参数自适应调节的虚拟同步机控制策略,用于并网变流器控制。通过分析系统的根轨迹特性,制定了虚拟阻尼和虚拟惯量等参数的自适应调节方案。对控制环节中的关键参数进行分岔分析,揭示了虚拟同步机中分岔现象的规律,确定了虚拟惯量和虚拟阻尼的自适应调节范围。实验结果证明,与固定参数调节方案相比,本文所提出的自适应调节方案能够更快地抑制频率波动,减少超调量,提高系统稳定性。这一研究能够有效提高新能源并网系统的稳定性和可靠性。The new power system is facing emerging weak-grid characteristics and stability issues.These challenges were addressed by introducing a parameter adaptive adjustment virtual synchronous generator(VSG)control strategy for the control of grid-connected converters.By analyzing the root locus characteristics of the VSG,a parameter adaptive adjustment scheme for parameters such as virtual damping and virtual inertia was formulated,and a bifurcation analysis was conducted on key parameters in the control loop,revealing the patterns of bifurcation phenomena.The adaptive adjustment range for virtual inertia and virtual damping was determined.The experimental results demonstrate that the adaptive adjustment scheme can more quickly suppress frequency fluctuations,reduce overshoot,and improve the system stability.This research is of significant importance for improving the stability and reliability of new energy grid-connected systems.

关 键 词：弱电网 分岔分析 虚拟同步机 根轨迹 参数自适应 

分 类 号：TM743[电气工程—电力系统及自动化]