逆变电源的虚拟结构化设计方法

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摘要对于用作交流工频电源的逆变电源, 输出电压无偏差地跟踪其给定电压信号是其最高控制目标。采用传统的闭环调节控制模式的逆变电源, 存在渐近式的动态调节过程, 在负载网络随机变化时, 输出电压难以快速跟踪给定电压信号。为此, 提出了逆变电源虚拟结构设计方法。该方法以开环逆变电源为被控对象, 在辨识被控对象参数的基础上, 通过控制器设计, 使逆变电源的给定电压、输出电压及输出电流之间的关系等同于这些变量作用于某种电路结构。该方法以电路结构为直接设计目标, 有机地将逆变电源自身实体参数变化因素融入到结构设计中, 间接实现逆变电源的控制目标。据此设计的逆变电源具有极高的响应速度, 可实现输出电压与给定电压信号无偏差。通过仿真与实验对其主要性能进行了验证。

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关键词 ：虚拟电路, 虚拟阻抗, 电力电子, 逆变器, 数学模型

Abstract：The key control objective is to track the reference voltage without error for the inverter system as alternating current (AC) power. However, gradually dynamic adjusting process exists in the traditional closed-loop control pattern. As a result, the voltage output cannot rapidly track the reference voltage as the load networks randomly changes. Therefore, a virtual structure design method is presented in this paper. In this method. after the recognition of parameters of open-loop inverter which is the controlled objict, we design the controller. The aim of this method is to make the relaionship among the reference voltage, output voltage, and output current of inverter equals the condition whe these variables act on some kind of circuit structure. This method takes the circuit structure as the direct design objective. The parameter changes of the inverts are considered in the structure design and the control objective can be realized indirectly. The inverters using the design have rapid response. The error between the voltage output and its reference can be eliminated at a stand-alone condition. The main performances is validated through simulations and experiments.

Key words： Virtual circuit virtual impedance power electronics inverter Mathematical model

收稿日期: 2011-04-07 出版日期: 2014-03-25

PACS:

TM464

作者简介: 陈宏志男, 1964年生, 博士, 讲师, 研究方向为电力电子技术及装置。王旭男, 1956年生, 博士, 教授, 博士生导师, 研究方向为电力电子技术及装置。

引用本文:

陈宏志王旭, 刘建昌, 宋崇辉. 逆变电源的虚拟结构化设计方法[J]. 电工技术学报, 2013, 28(8): 157-163. Chen Hongzhi, Wang Xu, Liu Jianchang, Song Chonghui. Virtual Structure Design Method for Inverter Power Supply. Transactions of China Electrotechnical Society, 2013, 28(8): 157-163.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I8/157

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