电源学报2025，Vol.23Issue(1)：84-92,9.DOI:10.13234/j.issn.2095-2805.2025.1.84
多场景下锁相环同步VSC暂态失稳边界研究
Transient Instability Boundary of PLL-synchronous VSC in Multiple Scenarios
摘要
Abstract
Aimed at the transient instability of a voltage source converter(VSC)based on phase locked loop(PLL)under weak network conditions and considering the influences of power grid line impedance,VSC reactive power injection and PLL filtering,the transient instability boundary of VSC is comprehensively studied based on the critical voltage in a variety of fault scenarios such as grid voltage sag,frequency fluctuation and three-phase asymmetric fault.Through the analysis of the VSC grid-connected vector diagram in different operation scenarios,the mathematical models of relationships between the grid voltage of VSC grid-connected system and factors(e.g.,line impedance and impedance angle,VSC operation power and its power factor,PLL phase-locked error,and grid frequency)in multiple scenarios are established.Then,the transient instability boundary of VSC is indicated based on the critical voltage.关键词
电压源变流器/暂态稳定性/多场景/锁相环Key words
Voltage source converter(VSC)/transient stability/multiple scenarios/phase locked loop(PLL)分类
信息技术与安全科学引用本文复制引用
陈征,胡鹏飞,杨再欣,于彦雪,江崇熙..多场景下锁相环同步VSC暂态失稳边界研究[J].电源学报,2025,23(1):84-92,9.基金项目
内蒙古自治区科技重大专项资助项目(2021ZD0026) （2021ZD0026）
浙江省自然科学基金资助项目(LQ21E070004) （LQ21E070004）
国家自然科学基金资助项目(52007167)This work is supported by Inner Mongolia Autonomous Region Major Science and Technology Project under the grant 2021 ZD0026 （52007167）
Natural Science Foundation of Zhejiang Province under the grant LQ21E070004 （）
National Natural Science Foun-dation of China under the grant 52007167 （）
