| 引用本文: | 孟岩峰,胡书举,许洪华.具有参数自适应特性的并网变流器无交流电压传感器控制方法[J].电力自动化设备,2019,39(7): |
| MENG Yanfeng,HU Shuju,XU Honghua.AC voltage sensorless control method for grid-connected converter with parameter adaptive characteristics[J].Electric Power Automation Equipment,2019,39(7): |
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| 摘要: |
| 针对当前无交流电压传感器控制技术中存在的电压观测器适用性问题，研究了一种基于参数自适应电压观测器的无交流电压传感器控制方法。阐述了基于二阶广义积分器构造的电压观测器原理，提出利用锁相环在线实时反馈电网频率信号的频率自适应控制方法。在此基础上，利用简化模型分析电感参数偏离实际值情况下的向量关系，提出一种具有电感参数自适应特性的改进电压观测器。应用所提的改进控制方法，可实现频率和电感参数自适应的并网变流器无交流电压传感器控制，提高了并网变流器的电网适应性。 |
| 关键词: 并网变流器 无交流电压传感器 交流电压观测器 参数自适应特性 |
| DOI：10.16081/j.issn.1006-6047.2019.07.001 |
| 分类号:TM46 |
| 基金项目:中国科学院战略性先导科技专项研究项目(XDA21050301) |
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| AC voltage sensorless control method for grid-connected converter with parameter adaptive characteristics |
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MENG Yanfeng1,2, HU Shuju1, XU Honghua1
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1.Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;2.School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| To address the applicability of voltage observers in the current AC voltage sensorless control technology, an AC voltage sensorless control method based on parameter adaptive voltage observer is developed. The principle of voltage observer based on the SOGI(Second-Order Generalized Integrator) is described. A frequency adaptive control method for voltage observer is proposed, which takes advantage of real-time phase-locked loop feeding back grid frequency signal. On this basis, the vector relationship is analyzed using simplified model, in the case that the inductance parameters deviate from their actual values. Moreover, an improved voltage observer with adaptive characteristics of inductance parameters is proposed. By applying the improved control approach, AC voltage sensorless control of grid-connected converter with adaptive characteristics of frequency and inductance parameters can be realized, which improves the grid adaptability of the grid-connected converter. |
| Key words: grid-connected converter AC voltage sensorless AC voltage observer parameters adaptive characteristics |
