摘要
现有的分布式发电逆变器并网同步控制主要分为电网跟踪型控制和电网支撑型控制2种模式。首先通过多时间尺度分离法,建立了电网跟踪型和电网支撑型同步控制的二阶统一模型。基于二阶统一模型,分析了跟网型和构网型控制的小信号稳定性,并指出跟网型控制与强电网兼容,而弱电网可以提高构网型控制的阻尼比。然后,分析了跟网型和构网型控制的暂态稳定性,并提出了一种通用的稳定性增强方法,以增强系统的同步稳定性。最后,通过实验测试,验证了所提改进型控制策略的有效性。
The existing grid connection controls of distributed generation inverters are mainly classified into the grid-following(GFL)control and the grid-forming(GFM)control.In this paper,with the multi-timescale separation method,the second-order unified models of GFL and GFM synchronization control are established.Based on the unified models,the small-signal stabilities of GFL and GFM control are analyzed,pointing that GFL control is compatible with strong grid,while weak grid can improve the damping ratio of GFM control.Besides,the transient stabilities of GFL and GFM are analyzed,and a general stability-enhanced method is proposed to enhance the synchronization stability.Finally,these findings are corroborated by experimental tests.This work is supported by CNPC's 14th Five-Year Plan Forward-looking,Basic Science and Technology Project(Research and Demonstration Application of Key Technologies for Integrated Development of Centralized Natural Gas Power Generation and Solar Energy Storage,No.2021DJ5404).
作者
黄龑
郝迎鹏
汪慧娴
郑龙烨
张凯哲
许银亮
HUANG Yan;HAO Yingpeng;WANG Huixian;ZHENG Longye;ZHANG Kaizhe;XU Yinliang(China Petroleum Planning and Engineering Institute,Beijing 100083,China;Tsinghua Shenzhen International Graduate School,Tsinghua University,Beijing 100084,China)
出处
《中国电力》
CSCD
北大核心
2023年第12期41-50,共10页
Electric Power
基金
中国石油十四五前瞻性、基础性科技课题(集中式天然气发电与风光储融合发展关键技术研究及示范应用,2021DJ5404)。
