电工技术学报  2018, Vol. 33 Issue (2): 370-379    DOI: 10.19595/j.cnki.1000-6753.tces.L70124
配网与新能源 |
提高直流微电网稳定性的有源阻尼方法
季宇1, 王东旭2, 吴红斌2, 吴鸣1, 吕齐3
1. 中国电力科学研究院 北京 100192;
2. 合肥工业大学电气与自动化工程学院 合肥 230009;
3. 清华大学电机工程与应用电子技术系 北京 100084
The Active Damping Method for Improving the Stability of DC Microgrid
Ji Yu1, Wang Dongxu2, Wu Hongbin2, Wu Ming1, Lü Qi3
1. China Electric Power Research Institute Beijing 100192 China;
2. School of Electrical Engineering and Automation Hefei University of Technology Hefei 230009 China;
3. Department of Electrical Engineering Tsinghua University Beijing 100084 China
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摘要 为解决直流微电网中恒功率负载大量接入引发的系统不稳定问题,提出一种基于并网接口变流器直流电流前馈的有源阻尼控制方法。研究直流微电网的并网接口DC-AC变流器数学模型和适用于DC-AC变流器的有源阻尼方法的控制策略,建立直流微电网的小信号数学模型。基于系统主导极点分布和阻抗匹配原则,分析恒功率负载对系统稳定性的不利影响及有源阻尼方法对系统稳定性的改善作用,并给出有源阻尼参数的设计原则。仿真和实验结果表明,所提有源阻尼方法可以提高在恒功率负载高渗透率下的直流微电网系统稳定性。
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关键词 直流微电网稳定性恒功率负载有源阻尼方法参数设计    
Abstract:In order to solve the unstable problem in DC microgrid caused by large amount of constant power load, this paper presents a new active damping control method based on the DC current feed forward of grid connected inverter. It also studies the mathematical model of grid connected DC-AC interfacing converter in the DC microgrid as well as the control strategy of active damping method for the DC-AC converter. Accordingly, the small signal mathematical model of the DC microgrid is established. Based on the dominant pole distribution and impedance matching principle, the adverse impacts of constant power load on the stability in DC microgrid and the improvement for the system stability by the active damping method are analyzed. The parameter design principles of the active damping are provided. The simulation and experimental results show that the proposed active damping control method can improve the stability of the DC microgrid with high penetration of constant power load.
Key wordsDC microgrid    stability    constant power load    active damping method    parameters design   
收稿日期: 2016-08-20      出版日期: 2018-01-31
PACS: TM711  
作者简介: 季宇, 男,1982年生,博士,研究方向为分布式发电与微电网技术。E-mail: jiyu@epri.sgcc.com.cn;吴红斌, 男,1972年生,教授,博士生导师,研究方向配电网络分析、分布式发电与微电网技术。E-mail: hfwuhongbin@163.com(通信作者)
引用本文:   
季宇, 王东旭, 吴红斌, 吴鸣, 吕齐. 提高直流微电网稳定性的有源阻尼方法[J]. 电工技术学报, 2018, 33(2): 370-379. Ji Yu, Wang Dongxu, Wu Hongbin, Wu Ming, Lü Qi. The Active Damping Method for Improving the Stability of DC Microgrid. Transactions of China Electrotechnical Society, 2018, 33(2): 370-379.
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