| To ensure the substation is run efficiently, a control and monitoring systems are needed. These systems should display the current status of all plant equipment, including alarms and secondary system indicators. They should also provide digital outputs to open and close switchgear, raise and lower taps on transformers, and show analogue values for key parameters like voltage, current, megawatts, and megavars. Aside from the standard indicators and controls, additional functions like synchronizing, reactive and voltage control, operational and safety-related interlocking, load control to prevent frequency collapse, etc., are also possible to implement. | 
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