Comparative stability study of DC current control strategies for a droop-controlled PMSG system

2015 IEEE Energy Conversion Congress and Exposition (ECCE) Pub Date : 2015-10-29 DOI:10.1109/ECCE.2015.7310536

Fei Gao, S. Bozhko, G. Asher, P. Wheeler

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Abstract

In presence of tightly regulated power electronic converters and motor drives in the more electric aircraft (MEA), stability is a great concern for the electrical power system (EPS) in the MEA. The DC electrical power distribution system (EPDS) of the MEA is one of the core architecture for electrical power transmission. DC transmission cables are also taken into account since it cannot be neglected in such low voltage microgrid. Proper active power is regulated by DC current control for the active rectifier. Both the output current of the active rectifier and the current after the capacitor can be used as feedback variable of the controller. This paper undertakes the comparative stability study on the DC current feedback approaches for droop-controlled PMSG system. The mathematical model and corresponding linearized model around the equilibrium point are developed. The state-space matrix is derived and the layout of the eigenvalues is shown for different methods respectively. The analysis is verified by time domain simulation results in Matlab/Simulink.

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下垂控制PMSG系统直流电流控制策略的比较稳定性研究

在电动飞机(MEA)中存在严格控制的电力电子变换器和电机驱动，稳定性是MEA中电力系统(EPS)的一个重要问题。MEA的直流配电系统(EPDS)是电力传输的核心架构之一。由于直流输电电缆在低压微电网中不可忽视，因此也要考虑直流输电电缆。通过对有源整流器的直流电流控制来调节适当的有源功率。有源整流器的输出电流和电容后的电流都可以作为控制器的反馈变量。本文对下垂控制永磁同步电机系统的直流电流反馈方法进行了稳定性比较研究。建立了系统的数学模型和相应的平衡点线性化模型。导出了状态空间矩阵，并分别给出了不同方法的特征值布局。通过Matlab/Simulink的时域仿真结果验证了分析的正确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 IEEE Energy Conversion Congress and Exposition (ECCE)

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