风电-串补输电系统次同步谐振特性与风电机组数量及线路参数关系研究  

RESEARCH ON IMPACT ON SUB-SYNCHRONOUS RESONANCE RISK FROM DFIG NUMBER AND GRID STRUCTURE IN GUYUAN AREA

作　　者：尹梦雪 刘辉 李蕴红 宋玮[1] Yin Mengxue;Liu Hui;Li Yunhong;Song Wei(Department af Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China;State Grid Jibei Electric Power Research Institute,North China Electric Power Research Institute Co.Ltd.,Beijing 100045,China;Grid-connected Operation Technology for Wind-Solar-Storage Hybrid System State Grid Corporation Key Laboratory,Beijing 100045,China)

机构地区：[1]华北电力大学电力工程系,保定071003 [2]国网冀北电力有限公司电力科学研究院(华北电力科学研究院有限责任公司),北京100045 [3]风光储并网运行技术国家电网重点实验室,北京100045

出　　处：《太阳能学报》2021年第1期174-179,共6页Acta Energiae Solaris Sinica

基　　金：国家电网公司科技项目(52010116000S)。

摘　　要：针对双馈风电-串补系统次同步谐振特性,针对风电-串补系统次同步谐振问题,在RT-LAB中建立风电-串补送出系统等值模型,利用阻抗分析方法,对SSR风险与风电机组数量以及线路参数关系进行研究。得到主要结论:1)在不同风速下,均存在使系统阻尼特性最差的并网风电机组数量;2)线路串补度减小,系统的次同步谐振风险逐渐降低;3)线路长度越大,系统次同步谐振风险随风电机组数量的增加而增加。In this paper,the equivalent model of wind farms and series-compensated power system in Guyuan is built in RT-LAB.Based on that model,the SSR characteristics of wind farms in Guyuan area under different DFIG numbers and line parameters are investigated through impedance method. The contributions to be included in the paper are as following:1)The relationship between SSR characteristics and DFIG number is nonlinear in Guyuan area. Under the condition of a given wind speed,there is certain number of DFIGs which will induce worst damping effect. 2)A higher compensation degree results in a less stable system. The SSR risk of the system increases with the increasing of DFIG numbers when the grid strength is high. The relationship between SSR risk and DFIG number is nonlinear when the grid strength is low.

关 键 词：次同步谐振 双馈风力机 阻抗分析法 风电-串补系统 

分 类 号：TM76[电气工程—电力系统及自动化]