DEIF AGC-4 Mk II Generator Controller Depth Configuration Guide

External analog setting value: External frequency, power, voltage, reactive power, or power factor setting values can be received through terminals 40/41 and 42 of option M12, which need to be activated with digital input. It can also be implemented through Modbus or CIO modules.

Phase compensation of step-up/step-down transformers

When the generator is connected to the grid through a step-up transformer, the phase shift caused by the transformer vector group needs to be considered. The AGC-4 Mk II supports setting phase compensation angles through parameters 9141 (Mother Parameter Set 1) and 9142 (Mother Parameter Set 2). Typical vector group corresponding angles: Dy1 →+30 °, Dy11 → -30 °, Yy6 → 180 ° (actually set as 179 °), Dz4 → -120 °, etc. If measuring transformers are used simultaneously, their phase shift should also be included in the total compensation. For step-down transformers, parameter settings are opposite to step-up (refer to Tables 9.6 and 9.7 in the manual).

Typical troubleshooting and maintenance recommendations

Synchronization failure: Check the slip, voltage difference, and circuit breaker closing time settings; Ensure that the phase of the bus voltage is correct (see 9141 phase compensation).

Unit startup failure: Check the startup relay, fuel solenoid valve, operation feedback signal (digital quantity/MPU/frequency), verify the number of startup attempts (6190) and startup preparation timer (6180).

Uneven load distribution: Adjust PID weights and droop parameters, check the shielding and terminal resistance of the load distribution line (if there are analog quantities).

Alarm misoperation: Confirm whether the fault level setting is too strict, and use the "suppression" function (such as Not run status, GB ON, etc.) to delay the alarm until the unit runs stably and takes effect.

Data loss: Regularly backup parameter files (. usw) through PC software, and be sure to perform a backup (9230) before replacing the internal battery.

CANshare or PMS lite communication abnormality: Check the CAN bus terminal resistance (120 Ω), shielding layer single ended grounding, and protocol selection consistency.