计及电压动态特性的虚拟同步机暂态稳定性分析
Transient Stability Analysis of Virtual Synchronous Generator Considering Voltage Dynamic Characteristics
魏凤廷 1张海涛 1王秀丽 1周嘉豪 1韩吉治 1沙子豪1
作者信息
- 1. 西安交通大学电气工程学院,陕西省西安市 710049;陕西省智能电网重点实验室(西安交通大学),陕西省西安市 710049
- 折叠
摘要
针对仅考虑摇摆方程可能导致虚拟同步机暂态稳定性分析误判的问题,首先考虑公共耦合点处电压变化对系统暂态行为的影响,建立了计及电压动态特性的虚拟同步机暂态模型,实现对虚拟同步机动态特性的全面精准刻画.在此基础上提出了 一种直接求解极限切除角和极限切除时间的快速迭代求解算法,并分析了虚拟同步机核心控制参数改变对系统暂态稳定性的影响机理.最后,搭建了典型结构虚拟同步机的电磁仿真模型,验证了理论分析和关键暂态指标求解算法的正确性,结果表明相比于仅考虑摇摆方程的暂态模型,所提模型能更精准地刻画虚拟同步机暂态特性.
Abstract
To address the misjudgment in the transient stability analysis of virtual synchronous generators when only considering the swing equation,the impact of voltage dynamics at the points of common coupling on the transient behavior of the system is first considered.A transient model considering the dynamic characteristics of voltage is established to achieve a comprehensive and accurate depiction of the dynamic characteristics of the virtual synchronous generator.On this basis,a fast iterative algorithm for directly solving the critical clearing angle and the critical clearing time is proposed,and the mechanism that the changes in the core control parameters of the virtual synchronous generator may affect the transient stability of the system is analyzed.Finally,an electromagnetic transient model of a virtual synchronous generator with the typical structure is built to verify the correctness of the theoretical analysis and the proposed algorithm.The results show that,compared to the transient model that only considers the swing equation,the proposed model more accurately depicts the transient characteristics of the virtual synchronous generators.
关键词
虚拟同步机/摇摆方程/暂态稳定性/电压动态特性Key words
virtual synchronous generator/swing equation/transient stability analysis/voltage dynamics引用本文复制引用
基金项目
陕西省自然科学基础研究计划项目(2022JQ-309)
出版年
2024
国家科技期刊平台
NSTL
万方数据