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山东理工大学电气与电子工程学院,山东省淄博市 255000
姚广增(1996—),男,硕士研究生,主要研究方向:柔性直流配电系统稳定控制。E-mail:guangzengyao@163.com
彭克(1983—),男,通信作者,副教授,硕士生导师,主要研究方向:交直流配电系统与综合能源系统。E-mail:pengke@sdut.edu.cn
李海荣(1995—),男,硕士研究生,主要研究方向:柔性直流配电系统低频振荡机理分析与优化控制。E-mail:lhr17865918227@163.com
收稿日期:2020-04-12,
修回日期:2020-07-06,
网络出版日期:2020-08-31,
纸质出版日期:2020-10-25
移动端阅览
姚广增,彭克,李海荣等.柔性直流配电系统高频振荡降阶模型与机理分析[J].电力系统自动化,2020,44(20):29-36.
YAO Guangzeng,PENG Ke,LI Hairong,et al.Reduced-order Model and Mechanism Analysis of High-frequency Oscillation in Flexible DC Distribution System[J].Automation of Electric Power Systems,2020,44(20):29-36.
姚广增,彭克,李海荣等.柔性直流配电系统高频振荡降阶模型与机理分析[J].电力系统自动化,2020,44(20):29-36. DOI: 10.7500/AEPS20200412002.
YAO Guangzeng,PENG Ke,LI Hairong,et al.Reduced-order Model and Mechanism Analysis of High-frequency Oscillation in Flexible DC Distribution System[J].Automation of Electric Power Systems,2020,44(20):29-36. DOI: 10.7500/AEPS20200412002.
在柔性直流配电系统中,由于存在多时间尺度的控制环节和物理电路相互作用的影响,容易产生高频振荡现象。文中针对柔性直流配电系统的高频振荡机理进行研究,建立了柔性直流配电系统高阶数学模型,通过对影响系统阶数的关键参数灵敏度分析实现系统降阶,推导了时域下系统参数对高频振荡频率影响的解析式,文中总结了直流侧滤波电容、交流侧等效电感和控制器参数对高频振荡的影响规律。最后,基于Simulink搭建了低压和中压柔性直流配电系统的仿真模型,仿真结果验证了理论分析的有效性。
High-frequency oscillation is frequently occurs in flexible DC distribution systems
due to the influence of the interaction of multiple time scale control links and physical circuits. This paper studies the mechanism of high-frequency oscillation
and establishes a high-order mathematical model of the flexible DC distribution system. Sensitivity analysis of the key parameters affecting the system order has been conducted to realize the model order reduction. The analytical equation of high-frequency oscillation is deduced in time domain considering the influence of system parameters. This paper summarizes the influence law of the DC side filter capacitor
AC side equivalent inductance and controller parameters on high-frequency oscillation. Finally
based on Simulink
the simulation models of low-voltage and medium-voltage flexible DC distribution systems are built
and the simulation results verify the validity of the theoretical analysis.
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