Feasibility of adaptive protection and control

A summary of 90 responses to a survey on the use of adaptive functions in protective relaying systems is given. The survey was developed by Working Group K8 of the Substation Protection Subcommittee of the IEEE Power System Relaying Committee. Some background on the concept of adaptive protection is given, the questionnaire is summarized, and an analysis of the questionnaire responses is provided. Section A of the questionnaire, which concerns satisfaction with existing relaying schemes, is summarized in two figures. Section B of the survey, which outlines 16 possible adaptive features, is repeated in its entirety. A number of adaptive features suggested by the respondents are also analyzed.<>