南方电网技术2024，Vol.18Issue(7)：3-10,26,9.DOI:10.13648/j.cnki.issn1674-0629.2024.07.001
新能源经柔性直流孤岛送出系统小信号同步稳定机理
Small Signal Synchronous Stability Mechanism of Renewable Energy Transmission System Through VSC-HVDC Working as Island Mode
摘要
Abstract
Due to the demand of green and low-carbon development,China is vigorously promoting the construction of large-scale renewable energy bases.Renewable energy transmission system through voltage source converter-voltage direct current(VSC-HVDC)working as island mode is receiving more and more attention.For the system,renewable energy devices usually adopt grid-following control,and the VSC-HVDC adopts grid-forming control.However,the synchronous stability mechanism for such a high-proportion or even 100%power electronic system is still unclear.Focusing on the role of phase-locked loops and virtual synchronous generator loops in the synchronization,a synchronization model for grid-following and grid-forming devices is established.Then,the small signal stability of the system is analyzed,and the operating area that ensures stable operation is derived.The operating states with instability risks are respectively proposed both for renewable energy and VSC-HVDC devices.Finally,the conclusions are veri-fied in PSCAD simulation.关键词
新能源发电/柔性直流输电/跟网型控制/构网型控制/小信号同步稳定分析Key words
renewable energy generation/VSC-HVDC transmission/grid-following control/grid-forming control/small-signal synchronous stability analysis分类
动力与电气工程引用本文复制引用
吴应双,杨子千,刘明顺,张野,王寅,唐王倩云..新能源经柔性直流孤岛送出系统小信号同步稳定机理[J].南方电网技术,2024,18(7):3-10,26,9.基金项目
国家自然科学基金青年科学基金资助项目(52207110) （52207110）
中国南方电网有限责任公司科技项目(GZKJXM20222215).Supported by the National Natural Science Foundation Youth Science Foundation Project of China(52207110) （GZKJXM20222215）
the Science and Technology Project of China Southern Power Grid Co.,Ltd.(GZKJXM20222215). （GZKJXM20222215）
