Hardware

The GPM PPC is composed normally by two hardware units, but this is not the only solution, other configurations may be applied.

Figure 1. A typical plant configuration

In fact, the GPM PPC needs all the other RTUs in the field:

UNIT 1UC-8112Power Plant Controller
UNIT 2UC-8112RTU SMB and other connection/adaptation SW, like SMB, Cap Banks
All the Field RTUsUC-8112Running Moxa process inside.
  • The PPC can also be commanded using PV+ but a windows machine is needed anyway to configure it.

  • The PPC UNIT Runs the Algorithm. Closed loop and PI controller.

  • The RTU Smart Bridge Unit adapts the Setpoints (P and Q orders) to the inverters.

  • The Cap Banks SW adapts also how the Capacitor banks need to be commanded.

  • The Configuration of the RTU SMB allows the SW "know" the Number of Inverters and "where" they are.

  • The RTU SMB sends a UDP message inside the LAN of the plant. This means that all the devices in the plant will receive this message (the infield IA240/ UC-8112). They will transmit this order to the inverter using Modbus RTU/TCP.