{"schemaVersion":1,"slug":"microgrid-pcc-export-limit-controller","name":"Microgrid PCC export-limit controller","kind":"symbol","abbreviation":"MPEC","aliases":["Microgrid active-power dispatch controls","microgrids Microgrid active-power dispatch controls","microgrids","Microgrids","PCC export measurement and limit","Export-control adjustment"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Requests resource adjustments when measured export approaches the assigned connection limit.","description":["Requests resource adjustments when measured export approaches the assigned connection limit. Active-power dispatch allocates the electrical work performed by the microgrid resources. A total site target, a resource power limit and the actual measured contribution are different quantities that must be connected clearly in the diagram.","In a microgrid with solar generation, a battery and generators, the controller can allocate an import/export target among the available resources while reserving the power needed for operating disturbances. For this reference, the drawing identifies “PCC export measurement and limit” at the input and “Export-control adjustment” at the output. Protection can provide a separate export-related function.","Identify the measurement boundary, power sign convention, resource limits and target priority. An original control block does not supply dispatch settings, a financial operating policy or proof of grid-code compliance. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation."],"readingNotes":["Start at the named input: PCC export measurement and limit. Identify its source device or document and the state represented on the drawing.","Follow the named output: Export-control adjustment. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Protection can provide a separate export-related function.","Identify the measurement boundary, power sign convention, resource limits and target priority. An original control block does not supply dispatch settings, a financial operating policy or proof of grid-code compliance."],"drawingChecklist":["Label the source and connection reference for pcc export measurement and limit.","Identify the destination and defined state of export-control adjustment.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Protection can provide a separate export-related function."],"distinction":"Protection can provide a separate export-related function. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.","facts":[{"label":"Representation","value":"Functional block"},{"label":"Installation focus","value":"Microgrids"},{"label":"Input / boundary","value":"PCC export measurement and limit"},{"label":"Output / connection","value":"Export-control adjustment"},{"label":"Lookup label","value":"MPEC is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-mg-power","relevance":"Public technical context for microgrid active-power dispatch controls. Active and reactive power, generation, load control, operating reserves and system supervision. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["power-plant-controller","point-of-common-coupling","microgrid-zero-interchange-target-block"],"artwork":"pi26-microgrid-pcc-export-limit-controller","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-active","input":"PCC export measurement and limit","output":"Export-control adjustment"},"plainEnglish":{"title":"What this block does","introduction":"Requests resource adjustments when measured export approaches the assigned connection limit.","example":"In a microgrid with solar generation, a battery and generators, the controller can allocate an import/export target among the available resources while reserving the power needed for operating disturbances. For this reference, the drawing identifies “PCC export measurement and limit” at the input and “Export-control adjustment” at the output. Protection can provide a separate export-related function.","drawings":"Start at the named input: PCC export measurement and limit. Identify its source device or document and the state represented on the drawing. Follow the named output: Export-control adjustment. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"PCC export measurement and limit"},{"name":"Output","meaning":"Export-control adjustment"},{"name":"Application reference","meaning":"An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections."}],"diagram":"flow","steps":["PCC export measurement and limit","MPEC","Export-control adjustment"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Microgrid control systems","url":"https://selinc.com/services/microgrids-power-management/microgrid-control-systems/"}],"profileId":"power-installation-microgrid-active"},"url":"https://eloragrid.ai/symbols/microgrid-pcc-export-limit-controller","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-pcc-export-limit-controller.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-mg-power","publisher":"SEL","title":"Microgrid control systems","url":"https://selinc.com/services/microgrids-power-management/microgrid-control-systems/","scope":"Active and reactive power, generation, load control, operating reserves and system supervision.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for microgrid active-power dispatch controls. Active and reactive power, generation, load control, operating reserves and system supervision. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}