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A Nonlinear Controller Design for Power Conversion Units in Islanded Micro-grids using Interconnection and Damping Assignment Tracking Control
IEEE Transactions on Sustainable Energy ( IF 8.8 ) Pub Date : 2020-05-04 , DOI: 10.1109/tste.2020.2992535
Seyed Mohammad Azimi , Saeed Lotfifard

Conventional controllers for electronically interfaced distributed generators (EI-DGs) that utilize droop controllers along with voltage/current proportional-Integral (PI) controllers illustrate undesirable transient responses in facing large disturbances generated following the changes in the system operating point. This article presents a nonlinear tracking controller for multisource EI-DGs operating in islanded micro-grids (MGs). The proposed controller is designed based on interconnection and damping assignment passivity-based controller (IDA-PBC) in the synchronous reference frame (SRF). The controller accounts for the complete dynamics of power conversion units (PCU) components that include DC/DC boost converters coupled with DC/AC inverter units through the interlinking capacitor and are connected to the grid through LC filters. The proposed controller enables PCUs to smoothly suppress the voltage/current and active/reactive power transitions during system operating point changes while precisely track the reference commands generated by the droop controllers. A set of time-domain simulations using realistic modeling of components of PCUs are carried out on a multi-resource islanded MG to validate the results. The performance of the proposed method is compared with that of PI controllers and existing nonlinear control strategies.

中文翻译:

互连和阻尼分配跟踪控制的孤岛微电网功率转换单元非线性控制器设计

用于电子接口分布式发电机(EI-DG)的常规控制器使用了下垂控制器以及电压/电流比例积分(PI)控制器,说明了在面对因系统工作点变化而产生的大干扰时的不良瞬态响应。本文提出了一种在岛状微电网(MGs)中运行的多源EI-DG的非线性跟踪控制器。所提出的控制器是基于同步参考系(SRF)中基于互连和阻尼分配基于无源性的控制器(IDA-PBC)设计的。控制器考虑了功率转换单元(PCU)组件的完整动态,其中包括通过互连电容器与DC / AC逆变器单元耦合的DC / DC升压转换器,并通过LC滤波器连接到电网。所提出的控制器使PCU能够平稳地抑制系统工作点变化期间的电压/电流和有功/无功功率转换,同时精确跟踪下垂控制器生成的参考命令。在多资源孤岛MG上进行了一组使用PCU组件的逼真的建模的时域仿真,以验证结果。将该方法的性能与PI控制器和现有的非线性控制策略进行了比较。在多资源孤岛MG上进行了一组使用PCU组件的逼真的建模的时域仿真,以验证结果。将该方法的性能与PI控制器和现有的非线性控制策略进行了比较。在多资源孤岛MG上进行了一组使用PCU组件的逼真的建模的时域仿真,以验证结果。将该方法的性能与PI控制器和现有的非线性控制策略进行了比较。
更新日期:2020-05-04
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