Abstract

This paper presents a sliding mode dynamic surface control strategy for multi-machine power systems with static var compensator (SVC) to design the controller of the generator excitation system. Firstly, compared with the existing control methods, the combination of sliding mode control and dynamic surface control improves the robustness of the system and avoids the “explosion of complexity” problems. Subsequently, the fuzzy logic system is introduced to estimate the unknown continuous function in power system, and the norm of the weight vector is used to replace the estimation of the entire weight vector. In this way, computational burden will be reduced. In addition, the influences of unknown time delays and dead-zones are considered. Finite cover lemma is introduced to deal with unknown time delays, which enables arbitrarily small $L_{\infty }$ tracking performance. The unknown dead-zone is converted into the sum of linear dead zone and bounded nonlinear dead zone. Finally, the simulation results are provided to validate the feasibility and effectiveness of the proposed control strategy.

摘要

本文提出了一种带有静态无功补偿器（SVC）的多机电力系统滑模动态表面控制策略，以设计发电机励磁系统的控制器。首先，与现有的控制方法相比，滑模控制和动态表面控制的结合提高了系统的鲁棒性，避免了“复杂性爆炸”的问题。随后，引入模糊逻辑系统来估计电力系统中未知的连续函数，并且使用权向量的范数来代替整个权向量的估计。这样，将减轻计算负担。另外，考虑了未知的时间延迟和死区的影响。引入了有限覆盖引理来处理未知的时间延迟，这使得任意小${\mathrm{大号}}_{\infty }$跟踪效果。未知死区将转换为线性死区和有界非线性死区的总和。最后，提供了仿真结果以验证所提出控制策略的可行性和有效性。