CAJ | 학술논문

海上风电系统的惯性响应有利于增强其所在区域电网的暂态稳定性。文中首先提出适用于海上风电场并网的VSC-HVDC控制策略，并解决由风电机组组网的海上交流系统缺乏惯性的问题。其次，基于所提的VSC-HVDC控制策略，结合变速恒频风电机组的虚拟惯性控制，研究海上风电系统的虚拟转动惯量与电网频率变化的关系，实现海上风电系统对电网频率的动态支持。最后，通过对含海上风电系统的区域电网的仿真分析，验证所提控制策略能够实现海上风电系统对电网频率的快速响应。
해상풍전계통적관성향응유리우증강기소재구역전망적잠태은정성。문중수선제출괄용우해상풍전장병망적VSC-HVDC공제책략，병해결유풍전궤조조망적해상교류계통결핍관성적문제。기차，기우소제적VSC-HVDC공제책략，결합변속항빈풍전궤조적허의관성공제，연구해상풍전계통적허의전동관량여전망빈솔변화적관계，실현해상풍전계통대전망빈솔적동태지지。최후，통과대함해상풍전계통적구역전망적방진분석，험증소제공제책략능구실현해상풍전계통대전망빈솔적쾌속향응。
Inertia response of offshore wind turbines is beneficial to enhance the transient stability of regional power systems. In this paper, the control strategy with voltage sourced converter based HVDC ( VSC-HVDC) appropriate for the integration of wind generation is proposed first to solve the low inertia issue of offshore network. Following that, based on the presented VSC-HVDC based control strategy, and by considering the virtual inertia control scheme of variable speed wind turbines, the relationship between the virtual inertia of the offshore wind power system and the network frequency variation is investigated, which provides dynamic frequency support to the grid. Finally, simulation results show that with the proposed control strategy, the offshore wind power system provides fast response to the grid frequency deviation.