摘要
近年来,随着电网中逆变电源渗透率的不断提高,针对逆变电源的主动支撑技术已成为研究热点。基于内禀同步的控制和基于频率测量的控制是使逆变电源具备主动支撑能力的两种方式。这两种方式在实际工程中都有所应用,但尚未有研究对比分析这两者在支撑效果、小信号稳定性和适应场景等方面的区别。为解决上述问题,文章首先对采用两种方式进行控制的逆变电源进行小信号建模,从机理层面对比分析了两种方式在有功支撑特性与稳定性方面的区别,并通过仿真验证了机理分析的结果。然后采用小干扰稳定分析方法给出了两种控制方式下的逆变电源振荡模态,辨析了逆变器控制参数与并网条件对系统阻尼特性的影响,提出了两种控制方式的适用场景。最后通过在RT-LAB平台的实验验证了小信号模型分析的结果。
In recent years,with the continuous improvement of the penetration of the inverter generators in the power grid,their active support technology has become a research hotspot.The active support of the inverter generators is generally realized through two different routes:the internal frequency control and the frequency measurement control.At present,both controls are practically used but there has seldom any comparison in their active support effects,the small-signal stability and the adaptive scenarios.In this paper,two kinds of active support methods are compared in terms of mathematical model,control mechanism,small signal stability and grid-connected adaptability.Firstly,the small signal model of the inverter generators of different technical routes is established.Then the damping characteristics of each oscillating mode in different inverter generator systems were calculated according to the small signal models,and the stability of various parameters in the two systems is analyzed.Influence,finally the applicable scenarios of different methods were proposed.
作者
孙大卫
刘辉
赵峰
吴林林
宋鹏
程雪坤
SUN Dawei;LIU Hui;ZHAO Feng;WU Linlin;SONG Peng;CHENG Xuekun(State Grid Jibei Electric Power Research Institute(North China Electric Power Research Institute Co.,Ltd.),Xicheng District,Beijing 100045,China;State Grid Wind-Photovoltaic-Energy Storage Hybrid Power Generation Technology Laboratory,Xicheng District,Beijing 100045,China;State Grid Jibei Electric Power Co.,Ltd.,Xicheng District,Beijing 100053,China)
出处
《电网技术》
EI
CSCD
北大核心
2020年第11期4359-4367,共9页
Power System Technology
基金
国家电网有限公司科技项目“基于规模化储能分散协同的电力系统安全稳定控制技术研究”
国网冀北电力有限公司科技项目(520101180042)。
关键词
主动支撑
并网适应性
并网逆变器
次同步振荡
小信号模型
active support technology
grid-connected adaptability
gird-connected inverter
subsynchronous oscillation
small-signal model
