基于有效相对增益矩阵的多直流协调分散控制
摘要：提出了一种基于有效相对增益矩阵(ERGA)的多直流控制回路配对方法。由于ERGA兼顾了带宽和稳态增益,计及了系统的动态特性,它能有效降低直流之间的耦合作用,避免发生模式谐振而恶化控制效果,便于分散控制器的设计。同时,本文基于ERGA提出了多直流协调控制策略,首先采用总体最小二乘-旋转不变技术参数估计(TLS-ESPRIT)算法对不同可取信号辨识系统传递函数,分析系统振荡模态和振型,从而得到各反馈信号的稳态增益和带宽。其次通过ERGA量化地分析各直流采用不同信号配对方式时的交互影响程度,并选取耦合作用最小的信号组合作为反馈信号,最后设计了考虑时滞的阻尼控制器。PSCAD仿真结果证明了该控制策略的有效性。
Abstract:A method is proposed for selecting the modulation signals of multiple HVDC supplementary controllers. The dynamic characteristic of system is considered in effective relative gain array (ERGA) that utilizes the information of bandwidth and steady gain, which can effectively reduce the interaction of multiple HVDC and avoid mode resonance to facilitate the design of decentralized control. At the same time, a coordinated decentralized control strategy of multiple HVDC is presented based on ERGA. Firstly, the system transfer function of different desirable signals is identified through the TLS-ESPRIT algorithm, the system oscillation mode and vibration mode are analyzed, and the steady-state gain and band width of each feedback signal are obtained. Secondly, the interaction influence degree of different paired signals is analyzed quantitatively based on ERGA, and the best paired signals with the minimum interaction are selected. In the end, the damping controller is designed by considering time lagging. The simulation results obtained with the EMTDC/PSCAD tool verify the efficiency of proposed strategy.
标题：基于有效相对增益矩阵的多直流协调分散控制
英文标题：Coordinately Decentralized Control of Multiple HVDC Based on Effective Relative Gain Array
作者：顾雨嘉, 王峰, 张军, 张爽, 李宏强, 刘天琪,
关键词：交互影响, 协调控制, 广域测量系统, 有效相对增益矩阵, 调制信号,
发表日期：2017-10-09
- 文件大小:
- 1.5 MB
- 下载次数:
- 60
-
高速下载
|
