基于SSO多扰动输入机理分析的DFIG-GSC功率振荡抑制策略研究  

DFIG-GSC power oscillation suppression strategy based on SSO multi-disturbance input mechanism analysis

作　　者：孙东阳[1] 钱梓杰 申文强 孟繁易 于德亮[1] 吴晓刚 SUN Dongyang;QIAN Zijie;SHEN Wenqiang;MENG Fanyi;YU Deliang;WU Xiaogang(School of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China;School of Electrical Engineering,Hebei University of Technology,Tianjin 300000,China)

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080 [2]河北工业大学电气工程学院,天津300000

出　　处：《电机与控制学报》2024年第2期99-109,共11页Electric Machines and Control

基　　金：国家自然科学基金(52277214)。

摘　　要：电网次同步振荡(SSO)已成为桎梏新能源发展的主要问题之一,针对SSO下双馈感应发电机(DFIG)中网侧变流器(GSC)的功率振荡问题展开研究。首先,建立SSO对GSC的多扰动输入数学模型,探究不同扰动输入的性质以及其对GSC系统的影响,明确了针对物理量扰动以及信号扰动分别采用补偿与滤除两种不同的抑制方法。其次,针对锁相环(PLL)输出误差经过坐标变换产生耦合振荡的问题,建立PLL输出误差角度的频域数学模型,并通过设计一种改进PLL消除其输出误差对GSC的信号扰动影响。同时,设计一种准谐振控制器的自适应算法,并提出基于自适应准谐振控制器的DFIG-GSC功率振荡抑制策略,消除SSO对GSC的物理扰动影响;最后,通过搭建具有SSO模拟环境的DFIG实验平台,验证本文所提控制策略的有效性。Sub-synchronous oscillation(SSO)of power grid has become one of the main problems restricting the development of new energy.The power oscillation of grid-side converter(GSC)in doubly-fed induction generator(DFIG)under SSO was studied,and an oscillation suppression strategy based on adaptive quasi-resonant controller was proposed.Firstly,the multi-disturbance input mathematical model of SSO to GSC was established,and the properties of different disturbance inputs and their effects on GSC system were explored.And two different suppression methods for physical disturbance and signal disturbance were defined,namely compensation and filtering.Secondly,aiming at the problem of coupling oscillation caused by the output error of phase-locked loop(PLL)through coordinate transformation,the frequency domain mathematical model of PLL output error Angle was established,and an improved PLL was designed to eliminate the influence of output error on the signal disturbance of GSC.At the same time,an adaptive algorithm of quasi-resonant controller was designed,and a DFIG-GSC power oscillation suppression strategy based on adaptive quasi-resonant controller was proposed to eliminate the physical disturbance effect of SSO on GSC.Then,according to the above theoretical analysis and research,resonant controller was used to eliminate the estimation error of PLL.Finally,effectiveness of the proposed suppression strategy is verified by simulation and experimental results.

关 键 词：双馈感应发电机 网侧变流器 锁相环 次同步振荡 振荡频率变化 自适应准谐振控制器 

分 类 号：TM346[电气工程—电机]