基于回转器理论的电流模式控制型DC-DC变流器统一大信号模型

发布时间：2018-01-11 23:36

本文关键词：基于回转器理论的电流模式控制型DC-DC变流器统一大信号模型　出处：《电工技术学报》2015年01期 　论文类型：期刊论文

【摘要】：随着新能源技术的大力发展,直流分布式系统以其独特的优势得到了越来越广泛的关注,逐渐成为业界的研究热点。虽然系统中每个模块都能够单独稳定运行,但由于模块之间复杂的相互作用,系统的稳定性特别是在大信号扰动下的暂态稳定性情况仍是令人困扰的一大难题,且目前该领域的理论研究成果相对缺乏。简单、有效、统一的大信号模型是进行大信号稳定性理论分析的基础。由于电流模式控制方法应用较为广泛,故本文基于回转器理论提出了一种适用于电流模式控制型DC-DC变流器的统一大信号模型。该模型实现了降阶,表达式简单,且仅需修改其中一个模型参数值即可实现对不同拓扑变流器的建模分析,为理论分析系统的大信号稳定性奠定了良好的基础,也为解析形式大信号稳定性判据的提出提供了可能。仿真和实验分别基于Buck、Boost及Buck-Boost变流器对该模型的有效性进行了验证。同时,为验证该大信号模型的完备性,对其稳态工作点附近的小信号特性也进行了分析,并与目前公认的比较精确的电流模式控制小信号模型进行了对比,得到了较好的结果。
[Abstract]:With the development of new energy technology, DC distributed system has been paid more and more attention for its unique advantages, and has gradually become a research hotspot in the industry, although each module in the system can run independently and stably. However, because of the complex interaction between modules, the stability of the system, especially the transient stability under the large signal disturbance, is still a difficult problem. At present, the theoretical research results in this field are relatively lacking. A simple, effective and unified large signal model is the basis for theoretical analysis of large signal stability. The current mode control method is widely used. Therefore, a unified large signal model for current-mode controlled DC-DC converters is proposed based on the gyroscope theory. The model realizes the reduction of order and the expression is simple. And only one of the model parameters can be modified to achieve the modeling and analysis of different topology converters, which lays a good foundation for the theoretical analysis of the large signal stability of the system. It also provides the possibility for the proposed analytical form of large signal stability criterion. Simulation and experiment are based on Buck. The validity of the model is verified by Boost and Buck-Boost converters. At the same time, the completeness of the large signal model is verified. The small signal characteristics near the steady-state operating point are also analyzed and compared with the widely accepted current mode control small-signal model. Good results are obtained.
【作者单位】：浙江大学电气工程学院;
【基金】：国家自然科学基金资助项目(50907061)
【分类号】：TM46
【正文快照】： 1引言随着全球范围内对能源消耗以及环境保护的日益重视,如何高效利用能源,特别是如何利用新能源技术在世界范围内引起了广泛的关注。但新能源系统的大范围接入也对传统电网的电压及频率稳定性造成了影响。由于直流分布式系统能够更容易地与新能源的输出端口相连接,并且不包含

【参考文献】