一种不平衡负载下直流微电网电压脉动抑制方法

doi:10.19595/j.cnki.1000-6753.tces.170841

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摘要

对不平衡负载引起的直流微电网电压脉动问题,在分析脉动电压产生原因的基础上,提出了基于超级电容器的直流母线电压脉动抑制方法,并设计了基于滑模控制的超级电容器电流控制策略,实现对参考电流的快速准确跟踪。采用二阶滑模控制的超螺旋算法不存在传统滑模控制的抖振问题,此外对所提控制策略的稳定性和鲁棒性进行了深入分析。考虑最严重的负载不平衡情况,设计了超级电容补偿装置的参数。最后在RT-LAB实时仿真平台上建立了直流微电网仿真模型,对相关理论分析和所提控制策略进行了验证。

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	朱晓荣
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关键词 ：直流微电网, 直流电压脉动, 超级电容器, 滑模控制, 不平衡负载

Abstract：

In this paper, the influence of unbalanced load on DC microgrid was analyzed firstly, then a super capacitor based DC bus voltage ripple suppression method was proposed under unbalanced load, and a current control strategy of the super capacitor was designed using the sliding mode control (SMC) to quickly and precisely track the reference current. Super-twisting algorithm of the second order SMC was employed to avoid chattering. And stability along with robustness of the proposed control system were analyzed. Furthermore, considering the most serious condition of unbalanced load, parameters design of the super capacitor based compensation device was given. Finally, real-time simulations were carried out based on RT-LAB to verify the theoretical analysis and the proposed control strategy.

Key words： DC microgrid DC voltage ripple super capacitor sliding mode control (SMC) unbalanced load

收稿日期: 2017-06-15 出版日期: 2018-08-14

PACS:

TM71

通讯作者: 朱晓荣女,1972年生,博士,副教授,研究方向为新能源发电及并网技术、电力系统分析等。E-mail：xiaorongzhu@ncepu.edu.cn

作者简介: 张雨濛女,1993年生,硕士研究生,研究方向为新能源发电及并网技术。E-mail：zhangyumeng9304@163.com

引用本文:

朱晓荣, 张雨濛, 荆树志. 一种不平衡负载下直流微电网电压脉动抑制方法[J]. 电工技术学报, 2018, 33(15): 3437-3449. Zhu Xiaorong, Zhang Yumeng, Jing Shuzhi. A Voltage Ripple Suppression Method of DC Microgrid under Unbalanced Load. Transactions of China Electrotechnical Society, 2018, 33(15): 3437-3449.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.170841 https://dgjsxb.ces-transaction.com/CN/Y2018/V33/I15/3437

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