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微电网电磁时间尺度相角稳定性分析 被引量:1

Phase-Angle Stability Analysis of Microgrids in Electromagnetic Time Scale
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摘要 随着电力电子化的分布式可再生能源大规模接入电网,同步振荡和谐波失稳现象越来越受到人们的关注。相较于传统的电力系统,新型微电网更多地表现出负阻抗性、低惯性、负阻尼性和能量的双向流动性。基于此,文章提出了一种基于小信号的电磁时间尺度相角稳定性分析方法。首先,建立了电磁时间尺度电力变换器的小信号模型,通过系统相角与分布式电源无功功率的内在联系得到电力变换器的相角稳定性指标;然后,建立了电力变换器的闭环传递函数并通过特征值分析得到相角稳定域;最后,通过仿真和实验验证了所提的微电网电磁时间尺度相角稳定性分析方法。 With the large-scale integration of distributed renewable energy into power grid,synchronous oscillation and harmonic instability have attracted more and more attention.Compared with the traditional power system,the microgrid has plenty of characteristics,such as negative impedance,low inertia,negative damping and bidirectional power flow.Consequently,this paper proposes a phase stability analysis method based on small-signal modeling in electromagnetic time scale.Firstly,the small-signal modeling of power converter is established,and the phase stability of power converter is obtained by the inherent relationship between system phase angle and reactive power of distributed generation.Furthermore,the closed-loop transfer function of the power converter is established,and the phase stability region is obtained through eigenvalue analysis.Eventually,the proposed phase angle stability method in electromagnetic time scale is verified by simulation and experiment results.
作者 王睿 孙秋野 张雪猛 马大中 WANG Rui;SUN Qiuye;ZHANG Xuemeng;MA Dazhong(College of Information Science and Engineering,Northeastern University,Shenyang 110819,China;State Key Laboratory of Synthetical Automation for Process Industries(Northeastern University),Shenyang 110819,China)
出处 《电力建设》 北大核心 2019年第9期99-106,共8页 Electric Power Construction
基金 国家自然科学基金项目(61773109,61573094) 国家自然科学基金重大项目(61627809) 中央高校基本科研业务费专项资金资助(N170405002)~~
关键词 分布式电源 电磁时间尺度 小信号分析 相角稳定性 distributed renewable energy source electromagnetic time scale small signal analysis phase angle stability
作者简介 王睿(1993),男,博士研究生,主要研究方向为分布式电源电磁时间尺度稳定性分析;孙秋野(1977),男,通信作者,博士,教授,主要研究方向为能源互联网的建模与优化运行、分布式多能源综合互补优化、多智能体协调控制、机器学习及其在能源系统中的应用等;张雪猛(1993),男,硕士研究生,主要研究方向为能源互联网中多分布式能源协调控制分析;马大中(1982),男,博士,副教授,主要研究方向为多能耦合系统的运行与优化。
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