Secondary voltage control system based on fuzzy logic

This paper discusses the problem of secondary voltage control in power systems. This problem is of deep interest for researchers and engineers, since it imposes serious restrictions to system’s operators. In general, this problem is resolved by selecting pilot buses representative of a region. Instead, in this paper, modal analysis is used to identify a coherent group of buses to be monitored. The set of information collected by modal analysis is considered by a fuzzy logic-based algorithm, so a voltage control policy is implemented. The academic IEEE 118-bus system is employed with all its limits considered, so the results may be reproduced. © 2014 Elsevier B.V. All rights reserved.