抑制虚拟同步发电机低频振荡的自适应阻尼控制算法策略  

Adaptive damping control algorithm strategy for suppressing low-frequency oscillation of virtual synchronous generator

作　　者：马成松 赵耀 刘庆飞 杨帆 MA Chengsong;ZHAO Yao;LIU Qingfei;YANG Fan(School of Electrical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Shanghai University High-efficiency Electric Energy Application Engineering Research Center,Shanghai200090,China;Shanghai International Airport Co.,Ltd.,Shanghai 201202,China)

机构地区：[1]上海电力学院电气工程学院,上海200090 [2]上海高校高效电能应用工程研究中心,上海200090 [3]上海国际机场股份有限公司,上海201202

出　　处：《电气应用》2020年第3期78-87,共10页Electrotechnical Application

基　　金：上海市科学技术委员会项目(18DZ1202302);上海市教育发展委员会和上海市教育发展基金会“晨光计划”(17CG56);广东电网有限责任公司科技项目资助(031800KK52170056)。

摘　　要：随着电力系统电力电子化的发展,以虚拟同步发电机(Virtual Synchronous Generator, VSG)控制策略为主的逆变器在电网中渗透率将越来越大。然而,传统电力系统中出现的低频振荡现象在虚拟同步发电机系统中未得到相应的研究。为了研究低频振荡对虚拟同步发电机系统的影响,在详细分析VSG控制策略的基础上,对虚拟同步发电机系统中出现低频振荡的原因进行分析研究。通过分析低频振荡时功角特性的关系,提出一种自适应阻尼控制算法,能够自适应控制系统阻尼系数,抑制低频振荡。最后,以Matlab/Simulink为仿真实验平台,验证了VSG系统中低频振荡现象和所提算法的有效性。With the development of power system electronic power, inverters based on virtual synchronous generator(VSG) control strategies will have greater penetration in the power grid. However, the phenomenon of low frequency oscillations occurring in conventional power systems has not been studied in the virtual synchronous generator system. In order to study the influence of low-frequency oscillation on the virtual synchronous generator system, the causes of low-frequency oscillation in the virtual synchronous generator system based on the detailed analysis of the VSG control strategy are analyzed, and the relationship of the power angle characteristics during low-frequency oscillation are analyzed. An adaptive damping control algorithm is proposed to adaptively control the damping coefficient of the system and suppress low-frequency oscillation. Finally, Matlab/Simulink is used as the simulation platform to verify the low frequency oscillation phenomenon and the effectiveness of the proposed algorithm in VSG system.

关 键 词：虚拟同步发电机 低频振荡 功角特性 阻尼系数 自适应阻尼 

分 类 号：TM712[电气工程—电力系统及自动化] TM341