摘要
为使并网逆变器能更好地配合大电网运行,采用模拟同步发电机的控制方法,使分布式发电系统借鉴成熟的电力系统控制方案,实现多模式运行。基于虚拟同步发电机的控制方法,改进了虚拟调频以及虚拟励磁系统,配合虚拟惯性有效地改善了系统在离网运行状态下由于负荷变化引起的频率不稳定问题;同时对三相LCL滤波器性能进行了分析,通过在电容侧增设无源阻尼电阻的方法,可以有效地抑制谐振尖峰,增强系统的稳定性。最后,通过MATLAB/Simulink的仿真实验验证,证实了所采用方法的有效性。
To make the grid-connected inverter can better cooperate with grid, using a method to imitate the control of syn- chronous generator, making the distributed generation system using the mature control scheme of power system, can operating in multi-mode. In this paper, based on the control method of virtual synchronous generator, improved the virtual synchronous frequen- cy modulation system and the virtual excitation system, effectively improved the system unstable problem caused by load changes in the status of islanded operation with virtual inertia, at the same time analyzed the performance of the three-phase LCL filter, and through the method of adding the passive damping resistance with the capacitance side, can effectively restrain the resonance peak, improve the stability of the system. At last, using MATLAB/Simulink simulation debugging, verify the feasibility of the methods used.
作者
郭筱瑛
王嘉磊
黎凡森
陈显东
曹太强
Guo Xiaoying Wang Jialei Li Fansen Chen Xiandong Cao Taiqiang(School of Information and Electric Engineering, Panzhihua University, Panzhihua 617000, China School of Electrical Engineering and Electronic Information,Xihua University, Chengdu 610039, China)
出处
《电子技术应用》
北大核心
2017年第1期152-155,160,共5页
Application of Electronic Technique
基金
攀枝花市科技计划项目(2014CY-S-1-2
2015 CY-C-5)
攀枝花学院项目(2014YB11)
西华大学研究生创新基金研究项目(YCJJ2016168)
四川省高校重点实验室项目(2013TYNZ-02)
四川省电力电子节能技术与装备重点实验室项目(szjj2015-066)
关键词
微电网
虚拟同步发电机
LCL滤波器
无源阻尼
micro grid
virtual synchronous generators（VSG）
LCL filter
reactive damping
