Stability of parallel DC/DC converters with time varying delay
Stability of parallel DC/DC converters with time varying delay
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DOI：
10.1109/powercon.2016.7753954
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发表时间：
2016-09
期刊：
影响因子：
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通讯作者：
A. Khalil;Ali Ashiebi;Jihong Wang
中科院分区：
文献类型：
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作者：
A. Khalil;Ali Ashiebi;Jihong Wang
通信网络的快速发展使得它们在分布式电力电子系统中取代传统布线非常有吸引力。并联型DC/DC变流器是一种重要的分布式电力电子系统。传统上，控制器通过导线交换控制信号。这降低了可靠性，增加了系统成本和复杂性。用通信网络代替它们会引入时延，可能会导致系统不稳定。本文研究了通过通信网络控制的并联DC变流器的稳定性。网络被表示为可变时延。基于求解一组线性矩阵不等式的一个定理，研究了系统的时滞相关稳定性。研究了电压控制器参数对最大允许延迟界的影响。此外，还讨论了时延变化率对最大允许延迟界的影响。
The rapid development in communication networks made them very attractive to replace conventional wiring in distributed power electronic systems. Parallel DC/DC converters are one of the important distributed power electronic systems. Conventionally, the controllers exchange the control signals through wires. This reduces the reliability and increases the system cost and complexity. Replacing them with communication network will introduce a time delay that may lead to system instability. The paper addresses the stability of parallel DC converters controlled over communication networks. The network is represented as variable time delay. A theorem based on solving a set of linear matrix inequalities is used to investigate the delay-dependent stability of the system. The effects of the voltage controller parameters on the maximum allowable delay bound are investigated. Furthermore the effect of the time delay variation rate on the maximum allowable delay bound is discussed.