{"schemaVersion":1,"slug":"microgrid-dispatch-infeasibility-alarm","name":"Microgrid dispatch infeasibility alarm","kind":"symbol","abbreviation":"MDIA","aliases":["Microgrid active-power dispatch controls","microgrids Microgrid active-power dispatch controls","microgrids","Microgrids","Target and resource constraints","Dispatch infeasibility indication"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Reports that the requested allocation cannot satisfy the declared resource and operating constraints.","description":["Reports that the requested allocation cannot satisfy the declared resource and operating constraints. 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 “Target and resource constraints” at the input and “Dispatch infeasibility indication” at the output. The alarm must not imply a physically achievable target.","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: Target and resource constraints. Identify its source device or document and the state represented on the drawing.","Follow the named output: Dispatch infeasibility indication. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The alarm must not imply a physically achievable target.","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 target and resource constraints.","Identify the destination and defined state of dispatch infeasibility indication.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The alarm must not imply a physically achievable target."],"distinction":"The alarm must not imply a physically achievable target. 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":"Target and resource constraints"},{"label":"Output / connection","value":"Dispatch infeasibility indication"},{"label":"Lookup label","value":"MDIA 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-pcc-import-limit-controller"],"artwork":"pi26-microgrid-dispatch-infeasibility-alarm","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-active","input":"Target and resource constraints","output":"Dispatch infeasibility indication"},"plainEnglish":{"title":"What this block does","introduction":"Reports that the requested allocation cannot satisfy the declared resource and operating constraints.","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 “Target and resource constraints” at the input and “Dispatch infeasibility indication” at the output. The alarm must not imply a physically achievable target.","drawings":"Start at the named input: Target and resource constraints. Identify its source device or document and the state represented on the drawing. Follow the named output: Dispatch infeasibility indication. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Target and resource constraints"},{"name":"Output","meaning":"Dispatch infeasibility indication"},{"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":["Target and resource constraints","MDIA","Dispatch infeasibility indication"],"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-dispatch-infeasibility-alarm","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-dispatch-infeasibility-alarm.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."}]}