A Characterization of All Retrofit Controllers
A Characterization of All Retrofit Controllers
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所有改造控制器的特征
DOI：
10.23919/acc.2018.8430982
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Jun
中科院分区：
文献类型：
--
作者：
Hampei Sasahara;T. Ishizaki;M. Inoue;T. Sadamoto;Jun
在本文中，我们给出了一个表征的所有改造控制器控制的大规模网络系统。改造控制器是本地插入式控制器，使得控制器设计仅需要感兴趣的子系统的模型，而不是整个网络系统模型。改造控制器保证了整个系统的稳定性的任何（范数无界）变化的相邻子系统，而不是感兴趣的子系统，只要网络的子系统和相邻子系统是稳定的。虽然改造控制器的设计过程已经提出，如何表征所有改造控制器仍然是一个悬而未决的问题。我们考虑两种情况下，互连信号是可用的和不可用的反馈信号。据透露，在互连信号可用的情况下，所有的改造控制器是由一个本地化补偿器，取消了输入输出映射从互连信号的测量信号，和本地控制器，本地稳定的子系统。还发现，在互连信号不可用的情况下，从测量信号到控制输入的影响必须在控制器中被抵消。最后，改造控制的有效性进行了验证，通过一个基准模型的数值例子，代表在日本东部的大部分电力系统。
In this paper, we give a characterization of all retrofit controllers for control of large-scale network systems. A retrofit controller is a local plug-in controller such that, rather than an entire network system model, only a model of the subsystem of interest is required for controller design. The retrofit controller guarantees the entire system stability for any (norm-unbounded) variations of neighboring subsystems, other than the subsystem of interest, as long as the network of the subsystem and neighboring subsystems is stable. Although a design procedure of a retrofit controller has been already proposed, how to characterize all retrofit controllers still remains an open question. We consider two cases where the interconnection signal is available and unavailable as a feedback signal. It is revealed that, in the case where the interconnection signal is available, all retrofit controllers are composed of a localizing compensator that cancels out the input-to-output map from the interconnection signal to the measurement signal, and a local controller that locally stabilizes the subsystem. It is also found that, in the case where the interconnection signal is unavailable, the effect from the measurement signal to the control input must be cancelled out in the controller. Finally, the effectiveness of retrofit control is verified through a numerical example of a benchmark model representing the bulk power system in the eastern half of Japan.