一种新型研究Boost电路大信号稳定性的模型

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摘要随着科技的不断进步, 多模块系统越来越多地被运用在各种复杂的应用场合。其中级联是应用最广泛的连接形式。级联稳定性（包括小信号稳定性和大信号稳定性）是系统可靠运行的关键因素。由于电力电子变流器属于强非线性系统, 直接分析单级变流器或者级联系统的大信号稳定性是极其复杂的, 故建立一种简单、有效的大信号模型是研究系统大信号稳定性的基础。本文以峰值电流控制下的Boost电路为例, 提出了一种新的大信号模型。该模型利用功率守恒原理, 在平均化的同时, 实现了不同工作条件下（如CCM和DCM）大信号模型的统一, 并实现了系统的降阶, 适合系统行为级建模及后续级联系统大信号稳定性分析。仿真和实验均证明了模型的正确性。

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	杜韦静
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	钱照明

关键词 ：大信号模型, Boost变流器, 级联系统, 峰值电流控制, 降阶模型

Abstract：With the development of science and technology, multi-converter systems are more and more popular in complex applications, and cascade is the most common connection mode. The stability of cascaded system (including small-signal stability and large-signal stability) is the key factor for reliable operation. Because of the nonlinear characteristic of power electronic converter, it is extremely difficult to analyze the large-signal stability of single stage and cascaded system directly. So, a simple and effective large-signal model is necessary for the large-signal stability analysis. Based on the energy conservation law, this paper proposes a novel large-signal model for Boost converter with peak current-mode control. This averaged model achieves order reduction and unification under different operation modes(such as CCM and DCM) under large signal disturbance. It is suitable to model and analyze the large signal stability of single stage and cascaded system due to its simplicity. The feasibility of proposed model is verified by simulation and experimental results.

Key words： Large-signal model Boost converter cascaded system peak current-mode control reduced-order model

收稿日期: 2011-10-12 出版日期: 2014-03-25

PACS:

TM46

基金资助:国家自然科学基金资助项目（50907061）

作者简介: 杜韦静女, 1985年生, 博士研究生, 研究方向电力电子系统集成。张军明男, 1975年生, 博士, 研究方向电力电子系统集成、电源管理及先进电力电子变流技术。

引用本文:

杜韦静, 张军明, 张阳, 钱照明. 一种新型研究Boost电路大信号稳定性的模型[J]. 电工技术学报, 2013, 28(3): 188-194. Du Weijing, Zhang Junming, Zhang Yang, Qian Zhaoming. A Novel Model for the Large-signal Stability Analysis of Boost Converter. Transactions of China Electrotechnical Society, 2013, 28(3): 188-194.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I3/188

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