浙江电力2025，Vol.44Issue(4)：11-18,8.DOI:10.19585/j.zjdl.202504002
大型水电机组柔性励磁系统的功率主回路设计
Power main circuit design of the flexible excitation systems for large hydropower units
摘要
Abstract
In response to the system voltage stability and damping issues caused by insufficient dynamic reactive power support capability of renewable energy units,this paper proposes a novel power main circuit topology for flex-ible excitation systems suitable for large hydropower units.Based on the characteristics of large hydropower units,a main circuit consisting of a front-end active neutral-point clamped(ANPC)three-level converter and a novel rear-end three-level chopper is designed.Key parameters such as DC-side voltage,voltage and current withstand capabil-ity of power device,DC-side capacitance,and grid-side inductance are analyzed.Through the Simulink simulation platform,the performance of the flexible excitation system is compared with that of a conventional thyristor excitation system.The results demonstrate that the flexible excitation system exhibits significant advantages in terms of strong excitation performance and support capability under fault disturbances,effectively reducing oscillation time and en-hancing power system stability.This research provides a theoretical basis for the optimal design of excitation systems for large hydropower units and lays the foundation for the engineering application of flexible excitation systems.关键词
柔性励磁/大型水电机组/三电平变换器Key words
flexible excitation/large hydropower units/three-level converter引用本文复制引用
颜文辞,贾思思,杜波,王丹,罗金,周开茂,陶征..大型水电机组柔性励磁系统的功率主回路设计[J].浙江电力,2025,44(4):11-18,8.基金项目
中国长江电力股份有限公司科研项目(Z522302059) （Z522302059）
