摘要
随着新能源发电渗透率的不断提高,频率稳定性问题日益突出,可提供惯量支撑的虚拟同步机(virtual synchronous generators,VSG)控制成为了关注的焦点。对VSG控制下直驱风机惯量支撑能力做出较为完整的定量分析,首先说明VSG控制下直驱风机惯量支撑的原理;其次经比较选取一种基于并网功率和频率关系的等效惯性系数定义方式,用以实现惯量支撑能力的准确描述;紧接着在考虑下垂特性的基础上,由等效惯性系数衍生定义等效惯性常数,并以等效惯性常数为依据对2种VSG控制下的惯量支撑能力做出定量分析;最后以仿真实验验证了理论分析的正确性。
With the continuous increase in the penetration rate of new energy generation,the issue of frequency stability is becoming increasingly prominent.Virtual synchronous generators(VSG)control that can provide virtual inertia support has become the focus of attention.This article provides a comprehensive quantitative analysis of the inertia support capability of direct drive turbines under VSG control.First,explain the principle of inertia support for direct drive turbines under VSG control.Secondly,a definition method of equivalent inertia coefficient based on the relationship between grid-connected power and frequency is selected through comparison to describe the inertia support capacity accurately.Subsequently,based on considering the droop characteristics,the equivalent inertia constant is derived from the equivalent inertia coefficient and used as the basis to quantitatively analyze the inertia support capacity of the two VSG controls.Finally,the effectiveness of the proposed method was verified through simulation experiments.
作者
韩平平
陈鹏飞
丁明
吴红斌
董玮
HAN Pingping;CHEN Pengfei;DING Ming;WU Hongbin;DONG Wei(Anhui Provincial Key Laboratory of Renewable Energy Utilization and Energy Saving(Hefei University of Technology),Hefei 230041,Anhui Province,China;National Key Laboratory of Renewable Energy Grid-Integration(China Electric Power Research Institute),Haidian District,Beijing 100192,China)
出处
《电网技术》
北大核心
2025年第2期501-510,I0032-I0034,共13页
Power System Technology
基金
国家电网有限公司总部科技项目(52120522003P)
国家重点研发计划“智能电网技术与装备”重点专项(2016YFB0900600)。
关键词
VSG控制
直驱风机
惯量支撑能力
等效惯性常数
VSG control
direct-drive wind turbine
inertia support capacity
equivalent inertia constant
