Linear ADRC direct current control of grid‐connected inverter with LCL filter for both active damping and grid voltage induced current distortion suppression
Linear ADRC direct current control of grid‐connected inverter with LCL filter for both active damping and grid voltage induced current distortion suppression
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DOI：
10.1049/iet-pel.2017.0787
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发表时间：
2018-07
影响因子：
2
通讯作者：
Baochao Wang;Zhaoyuan Shen;Hong Liu;Jian-Fen Hu
中科院分区：
文献类型：
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作者：
Baochao Wang;Zhaoyuan Shen;Hong Liu;Jian-Fen Hu
可再生能源发电的转换和利用往往需要并网逆变器。应用LCL滤波器去除电力电子斩波谐波时，电能质量面临谐振阻尼和电网电压感应电流畸变两个问题。传统上，需要两个单独的控制算法来处理这两个问题，需要额外的电流传感器，增加了控制复杂性并限制了性能。本研究表明，线性自抗扰控制（ADRC）能够通过单一结构同时将谐振阻尼和电网电压感应电流畸变视为整体扰动，同时在动态、稳态、小参数设置和大参数设置以及参数变化下实现更高的电能质量，经实验结果验证。原则上，无论是否了解系统模型，都可以配置 ADRC。这项研究还表明，正是测量噪声容限使得两种配置在实践中有所不同。通过在 ADRC 算法中使用模型信息，可以减少所需的带宽，从而对测量噪声提供更大的容忍度。此外，ADRC控制器只有两个参数可以调节“快”或“慢”，这使得实现起来很容易。
The conversion and utilisation of renewable energy generations often require grid-connected inverters. When applying LCL filter to remove power electronic chopping harmonics, the power quality faces two issues of resonance damping and grid voltage induced current distortion. Conventionally, two separate control algorithms are required to treat the two issues, requiring an additional current sensor, increasing control complexity and limiting performance. This study demonstrates that linear active disturbance rejection control (ADRC) is able to treat both resonance damping and grid voltage induced current distortion as overall disturbance at the same time through a single structure, while achieving higher power quality for dynamic, steady-state, small and large parameter setup, as well as parameter variations, as validated by experimental results. In principle, the ADRC can be configured with or without knowledge of the system model. This study also reveals that it is the measurement noise tolerance that makes the two configurations different in practice. By using model information in ADRC algorithm, the required bandwidth can be reduced, offering more tolerance to measurement noise. Moreover, the ADRC controller has only two parameters to tune for ‘fast’ or ‘slow’, which makes it easy for implementation.