Instructions for System Operating Mode:
The power supply system consists of two transformers in parallel connection. Under normal operation, the compensator is connected to the lower part of the transformer 2# and the bus between the transformers 1# and 2# is disconnected. A set of SVC is running below the transformer 1#. The detection signals of the two controllers of our compensator are connected to the signals of the two transformers. When the system runs normally, the compensator is controlled by the controller 2#. For overhaul of the transformer 2#, turn on the switch of bus connection and meanwhile disconnect the transformer 2#, and then the transformer 1# is controlled by the compensator.
The operating state of PLC is optional by 1CK switch. When the switch turns on PLC (I1.7), the switching of compensator is controlled by the controller 1#. When the PLC (I2.0) is turned on, the switching of compensator is controlled by the controller 2#. If none of I1.5, I1.6, I1.7 and I2.0, is turned on, PLC examines the three points (I2.1, I2.2 and I2.3) for automatic selection of control state. I2.1 is the state of bus connection, I2.2 is the state of contactor of transformer 1# and I2.3 is the state of contactor of transformer 2#.