中国电机工程学报2026，Vol.46Issue(17)：6137-6149,中插1,14.DOI:10.13334/j.0258-8013.pcsee.251284
新能源场站直流汇集送出系统功率传输能力研究
Research on Power Transmission Capacity of DC Collection and Delivery System in Renewable Energy Power Stations
摘要
Abstract
With the increasing demand for renewable energy power transmission,DC collection and delivery has become one of the most efficient methods.In high-proportion renewable energy and power-electronics-dominated(i.e.'dual-high')power systems,small-signal stability is a critical factor constraining stable power transmission.However,the stable power transmission capability of DC collection and delivery systems remains unclear.This paper first establishes the basic topology and small-signal model of a renewable energy power station's DC collection and delivery system.Using modal analysis,it examines the characteristics of major sub/super-synchronous oscillation modes in the system.Considering the volatility of renewable power generation at the collection terminals under different integration scenarios and the impact of power regulation at the collection station on system stability,the study investigates how different power variations at the stations affect power transmission through various oscillation modes.Subsequently,by analyzing the stability under different power levels at the collection terminals,the stable power transmission range of the DC collection system is determined.The study reveals the small-signal stability constraints at different operating points and the multi-modal cross-coupling instability mechanism when the aggregated power fluctuates.Finally,propose a parameter optimization method based on the distance to the small-signal stability boundary,which can expand the stable power transmission range of the DC collection and delivery system.The effectiveness of the parameter optimization scheme in enhancing power transmission capability is verified through simulations in PSCAD/EMTDC.关键词
直流汇集送出系统/功率稳定传输/多模态交叉失稳/控制参数优化Key words
DC collection and delivery system/stable transmission of power/multi-modal cross-coupling instability/control parameter optimization分类
信息技术与安全科学引用本文复制引用
胡宸凤,郭春义,贺之渊..新能源场站直流汇集送出系统功率传输能力研究[J].中国电机工程学报,2026,46(17):6137-6149,中插1,14.基金项目
国家自然科学基金项目(U25B6020). Project Supported by National Natural Science Foundation of China(U25B6020). （U25B6020）
