Outline of SupplyYokogawa CI Server is installed to monitor and control the solar power production facility including the substation and major equipment such as inverters, meters, weather stations, and motor protection relays (MDB), and to manage the “Zero Export” function to the grid.Zero export is a common control function for private grid type solar projects whereby PV energy is 100% consumed exclusively by the off-taker with 0% limitation on active power feed-in to the grid. The CI Server-based monitoring and control system is engineered to control active power generation in reaction to active load changes so as to minimize power leaks to the transmission line that could cause power trips. The CI Server is also equipped with comprehensive monitoring system functions including automatic daily alarms and alerts via email, switchgear on-off control and performance ratio calculations.The FA-M3 controllers used in this project are provided with two types of CPU: the new e-RT3 CPU runs Python scripts for the communication link to the CI Server; and the standard CPU is used to connect hardwired discrete inputs/outputs for status monitoring and sequence control.6Thai Solar Energy / Thailand
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