负载均流的自适应虚拟阻抗下垂控制方法

王天宏; 李奇; 陈维荣

doi:10.3969/j.issn.0258-2724.2017.05.025

负载均流的自适应虚拟阻抗下垂控制方法

doi: 10.3969/j.issn.0258-2724.2017.05.025

基金项目:

国家自然科学基金资助项目（61473238，51407146）

四川省杰出青年基金资助项目（2015JQ0016）

详细信息

作者简介:
王天宏(1994-),男,博士研究生,研究方向为新能源技术及其应用、混合动力系统能量管理及应用等,E-mail:bk20121444@my.swjtu.edu.cn

计量
- 文章访问数: 646
- HTML全文浏览量: 77
- PDF下载量: 78
- 被引次数: 0
出版历程
- 收稿日期: 2016-11-20
- 刊出日期: 2017-10-25

Adaptive Virtual Impedance Droop Control Method in Load Sharing

摘要

摘要: 为实现直流外电网系统的负载均流，提高系统稳定性，在考虑线路阻抗的前提下，提出一种基于自适应虚拟阻抗的下垂控制方法.该方法根据输出下垂特性和虚拟阻抗原理，将负载电压、电流等代入虚拟阻抗算法，对所得虚拟阻值进行适当修正，实现了虚拟阻抗的自适应修正，能够有效改善负载均流效果.在搭建的实验平台上与传统下垂控制、传统虚拟阻抗下垂控制进行实验测试与对比，结果表明：传统虚拟阻抗下垂控制方式和自适应虚拟阻抗下垂控制方式均能将负载电流差异抑制在0.04 A内，各并联单元输出电流差异小；自适应虚拟阻抗下垂控制方式的负载调整率为0.1%，具有更低的负载调整率；综合考虑输出电流差异、负载调整率、母线电压等因素，自适应虚拟阻抗下垂控制方式具有良好的负载均流优越性和系统稳定性.
- 直流微电网 /
- 变换器并联运行 /
- 负载均流 /
- 下垂控制 /
- 自适应虚拟阻抗
Abstract: An adaptive virtual impedance droop control method considering line impedance is proposed to achieve load sharing of a DC grid system and improve system stability. Based on the output droop characteristics and the principle of virtual impedance, the load voltage and current are taken into consideration in the virtual impedance algorithm. Then, the virtual resistance obtained is modified to realize adaptive correction, which effectively improves the load sharing performance. Finally, experimental measurement and comparison with traditional droop control and traditional virtual impedance droop control are carried out on the experimental platform. The results indicate that the traditional virtual impedance droop control mode and adaptive virtual impedance droop control mode can maintain the load current difference under 0.04 A. Further, the parallel output current difference is small, and the load regulation rate of the adaptive virtual impedance droop control method is 0.1%, which is lower than those of the other two control methods. Given factors such as output current difference, load regulation rate, and bus voltage, the adaptive virtual impedance droop control method has load sharing superiority and system stability.
- direct current microgrid /
- converter parallel operation /
- load sharing /
- droop control /
- adaptive virtual impedance

HTML全文

参考文献(16)

LI Qi, CHEN Weirong, LIU Zhixiang, et al. Net power control based on linear matrix inequality for proton exchange membrane fuel cell system[J]. IEEE Transactions on Energy Conversion, 2014, 29(1):1-8.

LI Qi, CHEN Weirong, LIU Zhixiang, et al. Active control strategy based on vector-proportion integration controller for proton exchange membrane fuel cell grid-connected system[J]. Iet Renewable Power Generation, 2015, 9(8):991-999.

韩莹,陈维荣,李奇,等. 分布式电源并网逆变器谐波抑制方法[J]. 电力系统及其自动化学报,2014,26(9):1-6. HAN Ying, CHEN Weirong, LI Qi, et al. Harmonic suppression methods for grid-connected inverter of distributed generation[J]. Proceedings of the CSU-EPSA, 2014, 26(9):1-6.

顾伟,吴志,王锐. 考虑污染气体排放的热电联供型微电网多目标运行优化[J]. 电力系统自动化,2012,36(14):177-185. GU Wei, WU Zhi, WANG Rui. Multi-objective optimization of combined heat and power microgrid considering pollutant emission[J]. Automation of Electric Power Systems, 2012, 36(14):177-185.

李奇,杨寒卿,韩莹,等. 光伏并网发电系统参数协调优化方法研究[J]. 西南交通大学学报,2016,51(5):894-901. LI Qi, YANG Hanqing, HAN Ying, et al. Method of parameter coordination optimization for grid-connected photovoltaic system[J]. Journal of Southwest Jiaotong University, 2016, 51(5):894-901.

TUMMURU N R, MISHRA M K, SRINIVAS S. Multifunctional VSC controlled microgrid using instantaneous symmetrical components theory[J]. IEEE Transactions on Sustainable Energy, 2014, 5(1):313-322.

杨新法,苏剑,吕志鹏,等. 微电网技术综述[J]. 中国电机工程学报,2014,34(1):57-70. YAN Xinfa, SU Jian, LÜ Zhipeng, et al. Review of microgrid technology[J]. Proceedings of the CSEE, 2014, 34(1):57-70.

SALOMONSSON D, SODER L, SANNINO A. An adaptive control system for a dc microgrid for data centers[J]. IEEE Transactions on Industry Applications, 2008, 44(6):1910-1917.

IRVING B T, JOVANOVIC M M. Analysis, design, and performance evaluation of droop current-sharing method[C]//Applied Power Electronics Conference and Exposition, 2000. Fifteenth IEEE.[S.1.]:IEEE, 2000:235-241.

JOVANOVIC M M, CROW D E, YI L F. A novel, low-cost implementation of "democratic" load-current sharing of paralleled converter modules[C]//Telecommunications Energy Conference, 1994.[S.1.]:IEEE, 1994:420-427.

KIM J W, CHOI H S, CHO B H. A novel droop method for converter parallel operation[J]. IEEE Transactions on Power Electronics, 2001, 17(1):25-32.

BATARSEH I, SIRI K, LEE H. Investigation of the output droop characteristics of parallel-connnected DC-DC converters[C]//Power Electronics Specialists Conference, PESC'94 Record.:IEEE, 1994:1342-1351.

ANAND S, FERNANDES B G, GUERRERO M. Distributed control to ensure proportional load sharing and improve voltage regulation in low-voltage DC microgrids[J]. IEEE Transactions on Power Electronics, 2013, 28(4):1900-1913.

AUGUSTINE S, MISHRA M K, LAKSHMINARASAMMA N. Adaptive droop control strategy for load sharing and circulating current minimization in low-voltage standalone DC microgrid[J]. IEEE Transactions on Sustainable Energy, 2015, 6(1):132-141.

林燎源,林钊,刘伟,等.基于阻性下垂的逆变器无线并联均流控制[J]. 电工技术学报, 2016,31(8):43-50. LIN Liaoyuan, LIN Zhao, LlU Wei. et al. Wireless current sharing scheme for parallel operationof inverters using resistive output impedance[J]. Transactions of China Electrotechnical Society, 2016, 31(8):43-50.

HUANG H H, HSIEH C Y, LIAO J Y, et al. Adaptive droop resistance technique for adaptive voltage positioning in boost DC-DC converters[J]. IEEE Transactions on Power Electronics, 2011, 26(7):1920-1932.

施引文献

附加材料(0)

访问统计

点击查看大图

计量

文章访问数: 646
HTML全文浏览量: 77
PDF下载量: 78
被引次数: 0

负载均流的自适应虚拟阻抗下垂控制方法

doi: 10.3969/j.issn.0258-2724.2017.05.025

作者简介: 王天宏(1994-),男,博士研究生,研究方向为新能源技术及其应用、混合动力系统能量管理及应用等,E-mail:bk20121444@my.swjtu.edu.cn

计量

出版历程

Adaptive Virtual Impedance Droop Control Method in Load Sharing

计量

出版历程

目录

作者简介:
王天宏(1994-),男,博士研究生,研究方向为新能源技术及其应用、混合动力系统能量管理及应用等,E-mail:bk20121444@my.swjtu.edu.cn