Automatic testing of synchronizing devices and synchro-check relays

Synchronizer simulates two systems to be synchronized: System 1 representing the mains is fixed in magnitude and frequency, system 2 is controlled in magnitude and frequency and represents the generator or system to be synchronized.

Using the module in single-phase to single-phase mode (each system represented by one voltage) is possible with any CMC test set. With a CMC 356, CMC 353, or CMC 256plus, three-phase to single-phase synchronization is possible, using the additional fourth voltage phase to represent the second system. With a CMC 430, or the additional use of the voltage channels of a CMS 356, even a three-phase to three-phase synchronization is possible.

The software automatically detects the circuit breaker closing command from the synchronizing device or synchro-check relay and, taking the CB closing time into account, evaluates if the synchronization takes place inside the synchronizing window. The control of the second output is variable following different test modes. The frequency and magnitude can be changed linearly depending on the ramping time constants of the generator.

For synchronizing devices with automatic adjustment functions, the adjustment control commands (f↥, f↧, V↥, V↧) may be used to control the second voltage output. To simulate the real system as closely as possible, dynamic generator models are available. The binary contact sequences of the adjustment commands, and the changes of voltage and frequency, can be monitored graphically in order to follow the progress of the synchronization.

An implemented synchronoscope displays the rotating voltage vector of system 2 respectively the moment of synchronization.

This module is part of the Test Universe software. For more information please refer to the Test Universe website.

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