{"schemaVersion":1,"slug":"power-plant-controller","name":"Power plant controller","kind":"symbol","abbreviation":"PPC","aliases":["PPC","park controller","plant-level controller"],"category":"microgrid-systems","drawingTypes":["SLD"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"The plant-level controller that measures at the connection point and sets inverter or turbine outputs to meet grid requirements.","description":["A power plant controller measures voltage, current, active and reactive power at the plant connection point and adjusts setpoints of all inverters or turbines to meet the network operator's requirements. Typical functions include active power limits, ramp rates, frequency response, voltage or reactive power control and power factor control.","Drawings show a control block with measurement inputs from the connection point CTs and VTs, a communication network to each inverter or turbine, and a link to the network operator's control system. A meter at the point of connection is usually the measurement source.","The controller's response speed is slower than the inverter internal controls, so fast events are still handled by the devices themselves. The symbol does not show control modes, settings or the response time agreed with the network operator."],"readingNotes":["Measurement comes from the connection point, not individual inverters.","Communication dashed lines show the setpoint path."],"drawingChecklist":["List control modes and the measurement point.","Show communication to each unit.","Reference agreed performance settings."],"distinction":"A power plant controller manages one generating plant at its connection point; a microgrid controller also manages loads and islanding.","facts":[{"label":"Measurement point","value":"Plant connection point"},{"label":"Controls","value":"P, Q, voltage, ramp, frequency response"},{"label":"Targets","value":"Inverters or turbines"},{"label":"Preview","value":"Independent educational illustration; consult the applicable standard and project legend for the exact graphic"}],"references":[{"sourceId":"expansion-20261027-pv","relevance":"Public solar plant architecture context."},{"sourceId":"s28-deif-hybrid-microgrid","relevance":"Public hybrid plant control context."}],"related":["microgrid-controller","point-of-common-coupling","grid-following-inverter","full-converter-wind-turbine-generator"],"artwork":"s28-power-plant-controller","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","plainEnglish":{"title":"What does Power plant controller mean?","introduction":"A power plant controller measures voltage, current, active and reactive power at the plant connection point and adjusts setpoints of all inverters or turbines to meet the network operator's requirements. Typical functions include active power limits, ramp rates, frequency response, voltage or reactive power control and power factor control.","example":"Drawings show a control block with measurement inputs from the connection point CTs and VTs, a communication network to each inverter or turbine, and a link to the network operator's control system. A meter at the point of connection is usually the measurement source.","drawings":"The controller's response speed is slower than the inverter internal controls, so fast events are still handled by the devices themselves. The symbol does not show control modes, settings or the response time agreed with the network operator.","terms":[{"name":"Terminal","meaning":"An identified point where a conductor connects."},{"name":"Signal","meaning":"Electrical information passed between devices, rather than necessarily the main power supply."},{"name":"Rating","meaning":"A value stating the conditions for which equipment is specified."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"Solar electrical system architecture","url":"https://www.ti.com/applications/industrial/energy-infrastructure/solar-energy/overview.html"},{"label":"Reliable hybrid power and microgrid solutions","url":"https://www.deif.com/applications/power-generation/reliable-hybrid-power-and-microgrid-solutions/"}],"detail":"The plant-level controller that measures at the connection point and sets inverter or turbine outputs to meet grid requirements. A power plant controller manages one generating plant at its connection point; a microgrid controller also manages loads and islanding.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/power-plant-controller","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/power-plant-controller.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"expansion-20261027-pv","title":"Solar electrical system architecture","publisher":"Texas Instruments","url":"https://www.ti.com/applications/industrial/energy-infrastructure/solar-energy/overview.html","type":"manufacturer","scope":"Public functional documentation. Original explanatory text and educational block artwork; no publisher graphics or files reproduced.","checkedOn":"2026-10-27","reuse":"link-only","relevance":"Public solar plant architecture context."},{"id":"s28-deif-hybrid-microgrid","title":"Reliable hybrid power and microgrid solutions","publisher":"DEIF","url":"https://www.deif.com/applications/power-generation/reliable-hybrid-power-and-microgrid-solutions/","type":"manufacturer","scope":"Public hybrid and microgrid control context combining gensets, PV, storage and mains.","checkedOn":"2026-10-28","reuse":"link-only","relevance":"Public hybrid plant control context."}]}