交直流混合微电网互联变流器微分平坦控制

doi:10.11930/j.issn.1004-9649.202109160

中国电力 ›› 2022, Vol. 55 ›› Issue (7): 102-109,120.DOI: 10.11930/j.issn.1004-9649.202109160

交直流混合微电网互联变流器微分平坦控制

张宇, 王洪希, 王璞

北华大学电气与信息工程学院，吉林吉林 132000

收稿日期:2021-10-08 修回日期:2022-03-05 出版日期:2022-07-28 发布日期:2022-07-20
作者简介:张宇（1994—），男，硕士研究生，从事电力电子方面研究，E-mail：zmatcha@163.com;王洪希（1971—），男，通信作者，教授，硕士生导师，从事电力电子及电力传动研究，E-mail：wang_hongxi71@163.com;王璞（1997—），女，硕士研究生，从事电力电子方面研究，E-mail：949382435@qq.com
基金资助:
吉林省教育厅科学技术研究项目（基于感应滤波的大功率整流电源谐波抑制研究，JJKH20180342 KJ）。

Flatness-Based Control of AC / DC Hybrid Microgrid Interconnected Converter

ZHANG Yu, WANG Hongxi, WANG Pu

School of Electrical and Information Engineering, Beihua University, Jilin 132000, China

Received:2021-10-08 Revised:2022-03-05 Online:2022-07-28 Published:2022-07-20
Supported by:
This work is supported by Science and Technology Research Project of Jilin Provincial Education Department ( Research on Harmonic Suppression of High-Power Rectifier Power Supply Based on Induction Filtering, No.JJKH20180342 KJ)

摘要/Abstract

摘要： 为提高交直流混合微电网在发生功率波动、电源缺失等情况下的动态和鲁棒性能，提出了一种基于微分平坦（flatness-based control，FBC）理论的互联变流器（interlinking converter，ILC）控制策略。首先分析了孤岛模式下子网内分布式电源采用下垂控制策略解决各自网内的功率分配问题；其次建立dq坐标轴下ILC数学模型，并证明了ILC系统满足微分平坦性；接着，根据微分平坦理论设计了ILC的功率控制器，其结构包括前馈控制和误差补偿两部分，系统采用串级控制结构，由功率外环产生平坦输出的参考轨迹，电流内环产生ILC期望输出的dq轴电压分量；最后，在Matlab/Simulink中建立FBC和PI控制的ILC仿真系统，在3种工况下仿真结果验证了FBC控制系统具有更好的动态性与鲁棒性。

关键词: 孤岛模式, 交直流微电网, 互联变流器, 微分平坦控制, 下垂控制

Abstract: An Interlinking Converter (ILC) control strategy based on the differential Flatness-Based Control (FBC) theory is proposed to improve the dynamic and robust performance of the hybrid AC-DC microgrid in the presence of power fluctuations and power loss. First analyzes the distributed power supply in the sub-network under the island mode. It uses the droop control strategy to solve the power distribution problem in the respective network. Secondly, it establishes the ILC mathematical model under the DQ axis and proves that the ILC system satisfies the differential flatness. Then, according to the differential flatness theory, the power controller of ILC is designed, which consists of feedforward control and error compensation. The cascade control structure is adopted in the system. The outer power loop generates the reference trajectory of balanced output, and the current inner loop generates the DQ axis voltage component of the ILC expected output. Finally, the ILC simulation system of FBC and PI control is established in Matlab / Simulink. Under three working conditions, the simulation results verify that the FBC control system has better dynamics and robustness.

Key words: islanded mode, AC / DC microgrid, interlinking converter, flatness-based control, droop control

张宇, 王洪希, 王璞. 交直流混合微电网互联变流器微分平坦控制[J]. 中国电力, 2022, 55(7): 102-109,120.

ZHANG Yu, WANG Hongxi, WANG Pu. Flatness-Based Control of AC / DC Hybrid Microgrid Interconnected Converter[J]. Electric Power, 2022, 55(7): 102-109,120.

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交直流混合微电网互联变流器微分平坦控制

Flatness-Based Control of AC / DC Hybrid Microgrid Interconnected Converter

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交直流混合微电网互联变流器微分平坦控制

Flatness-Based Control of AC / DC Hybrid Microgrid Interconnected Converter

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