Synchronized, end-to-end tests on protective relay schemes

摘要

Public domain satellite timing signals are being used to synchronize simultaneous secondary injection tests on power system protective relay schemes at remote ends of power transmission lines. By this means, protection schemes that include communication functions can be tested in a meaningful, time-related manner. A discussion of the need for such a test method, the principles and history of the test method, and details of a recent series of tests are included.