The SMV receiver application configuration is done with Application Configuration in PCM600. TxTR function blocks are used in the receiver application to supervise the sampled values and to connect the received analog inputs to the application. The SMVRCV function block outputs need to be connected according to the SMV application requirements. Typically, all three analog phase voltages are connected, for example, to UTVTR1. When voltages are used, the VT connection analog input setting parameter for phase voltages must be set to "Wye" for IEC 61850-9-2 LE and IEC 61869-9 compliancy.
The synchrocheck function requires only one analog phase voltage (UL1).
The WARNING output of TxTR should be connected in the SMV applications to perform the necessary actions if the SMV angle information is out of the accuracy range. Depending on the protection function operation principle, inaccurate angle information is also seen in the protection function operation inaccuracy. Additionally, the ALARM output of TxTR should be connected to ensure fail-safe operation in all circumstances. The WARNING output is internally active whenever the ALARM output is active.
WARNING and ALARM information is internally propagated to the measurement functions. Thus, measurement functions can update the measured value quality information accordingly without any additional connections.
The receiver activates the TxTR WARNING and ALARM outputs if if the quality’s validity value is invalid (b01 or b10). When the receiver is in the test mode, it accepts SMV frames with a test bit without activating the TxTR WARNING and ALARM outputs.
The TxTR WARNING in the receiver is activated if the synchronization accuracy of the sender or the receiver is worse than 4 µs. The output is held on for 10 seconds after the synchronization accuracy returns within limits. Additionally, TxTR WARNING is activated when the channel’s quality validity value is questionable (b11).
The TxTR ALARM in the receiver is activated if the synchronization accuracy of the sender or the receiver is unknown, the difference between the received samples' time stamp and the protection relay's time is more than 8 ms, the SMV frame is delayed more than SMV Max Delay or two or more consecutive SMV frames are lost. The output is held on for 10 seconds after the synchronization accuracy returns within limits.
The quality of received SMV is available as outputs in TxTR function blocks and is not propagated directly to protection function blocks along with the SMV measurement values. To handle situations where SMV is not available, its quality is not good or there is an issue with time synchronization, the WARNING and ALARM outputs of SMV measurement function blocks must be connected to the application, for example to block directional protection.