Improvement of Generator Synchronization Algorithm

Abstract

The collection, transmission and processing of information in a digital substation takes place in digital form, which is not applicable to analog generator timing devices (RTDs). Their implementation in systems under design/reconstruction is impossible. Insufficient flexibility of the analog synchronizer algorithm may lead to non-synchronous switching when the voltage and frequency rate threshold is exceeded. The lack of self-diagnostics of the voltage circuits in the analog synchronizer may lead to failure or breakdown due to non-synchronous switching due to faulty circuits of another generator, which is already synchronized. In this paper a review and implementation of the synchronization function of generators in microprocessor devices is carried out. The process of switching the generator to parallel operation and to network operation, the algorithm of the exact synchronization function and methods of increasing the accuracy of synchronization are considered and analyzed. The requirements for precision synchronization devices are studied. The developed precise synchronization function is actively used in automatic synchronization devices of EKRA 200 series generators.