Distributed recording of disturbances for verification of system models

The requirements for improvement in the stability of electric power systems and reduction in the effect of short circuit faults or other abnormal system conditions on sensitive customers can be met only by better understanding of the behavior of the system and optimized configuration of the different protection and control systems. The planning, design and implementation of such systems are based on the use of advanced analysis tools. They model the primary and secondary components of electric power systems and analyze its operation under normal or abnormal conditions. The accuracy of the different simulations is determined to a great extent by the accuracy of the models. The paper describes different types of analysis tools, the models of power system equipment and the requirements for verification of these models. The recording capabilities of multifunctional IEDs are discussed and different recording modes are identified and proposed for specific needs. The architecture of a distributed system for recording wide area disturbances is presented. Requirements for time synchronization of multifunctional IED located throughout the system are discussed later in the paper.