摘要
虚拟同步发电机的提出为可靠使用分布式电源提供了保障,其中转动惯量的引入使得系统抗扰动能力增强,但却无法兼顾动态调节的快速性。针对这一不足,提出一种自适应转动惯量控制方法。首先,对比下垂控制后建立虚拟同步发电机的数学模型,分析虚拟同步发电机转动惯量参数对系统性能的影响。其次,设计一种基于角速度变化率和偏差影响下的虚拟转动惯量三段式结构,该策略在保证系统稳定的前提下明显提高系统快速性。最后,通过Matlab/Simulink验证了所提方法的有效性和可行性。
The proposition of virtual synchronous generator(VSG)provides guarantee for the reliable utilization of dis⁃tributed generation,in which the introduction of rotational inertia enhances the system’s anti-disturbance capability but limits its rapidity of dynamic regulation.To overcome this disadvantage,an control method for adaptive rotational iner⁃tia is proposed.First,amathematical model of VSG is established by comparing the droop control,and the influences of VSG rotational inertia parameters on the system performance areanalyzed.Then,a three-stage structure is designed,which is based on the virtual rotational inertia under the influences of the changing rate of angular velocity and devia⁃tion.Under this strategy,the rapidity of the system is obviously improved under the premise of ensuring its stability.Fi⁃nally,the effectiveness and feasibility of the proposed method are verified using Matlab/Simulink.
作者
李彦哲
郭旭
董海鹰
刘川泽
LI Yanzhe;GUO Xu;DONG Haiying;LIU Chuanze(School of Automation&Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2020年第12期144-150,共7页
Proceedings of the CSU-EPSA
基金
甘肃省重点研发计划资助项目(18YF1GA056)。
关键词
微电网
逆变器
旋转惯量
功率振荡
虚拟同步发电机
自适应控制策略
micro-grid
inverter
rotational inertia
power oscillation
virtual synchronous generator(VSG)
adaptive control strategy
