电网技术2025，Vol.49Issue(9)：3633-3642,中插28-中插33,16.DOI:10.13335/j.1000-3673.pst.2024.1040
基于直流电容自同步的构网型SVG暂态同步稳定分析与提升策略
Transient Synchronous Stability Analysis and Enhancement Strategy for DC Capacitor Self-synchronisation-based Constructed Grid Type SVGs
摘要
Abstract
The continuous integration of wind power and photovoltaic energy sources has led to an increasing prevalence of issues related to insufficient grid voltage support capabilities.The configuration of SVG in new energy bases represents an effective means of addressing these challenges.Compared to the traditional grid-following SVG with low-bandwidth voltage control,the ideal voltage source characteristics of grid-constructing SVG offer a superior fit to the system requirements and have been the subject of extensive research in recent years.Nevertheless,while simulating the synchronous characteristics of synchronous generators,the grid-constructing SVG also has the risk of transient power angle instability under large disturbances.To this end,firstly,the control structure of the new energy-combined delivery system is presented,and the synchronous principle of the grid-type SVG is analyzed based on the dynamic equation of DC capacitance.Secondly,an equivalent analytical model of the new energy-combined delivery system is established,and the system's transient power angle instability mechanism under the dynamic influence of new energy is revealed.Further,a stability-enhanced self-synchronous control is proposed based on the adaptive power angle compensation principle,which can effectively improve the transient stability performance of the system.Finally,the mechanism analysis's correctness and the improvement measures' effectiveness are verified by digital simulation and hardware simulation of RT-LAB.关键词
构网型SVG/新能源场站/同步稳定/暂态失稳机理/提升策略Key words
grid-type SVG/new energy base/synchronous stability/transient instability mechanism/improvement measures分类
信息技术与安全科学引用本文复制引用
邱硕,庄可好,汤波,王子骏,辛焕海..基于直流电容自同步的构网型SVG暂态同步稳定分析与提升策略[J].电网技术,2025,49(9):3633-3642,中插28-中插33,16.基金项目
国家电网有限公司总部科技项目(5108-202218280A-2-435-XG).Project Supported by the Science and Technology Project of State Grid Corporation of China(5108-202218280A-2-435-XG). （5108-202218280A-2-435-XG）
