{"schemaVersion":1,"slug":"microgrid-inverter-reactive-capability-limiter","name":"Microgrid inverter reactive-capability limiter","kind":"symbol","abbreviation":"MIRL","aliases":["Microgrid voltage and reactive-power controls","microgrids Microgrid voltage and reactive-power controls","microgrids","Microgrids","Reactive request and inverter limits","Permitted reactive target"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Restrains the assigned inverter reactive target to its declared operating capability.","description":["Restrains the assigned inverter reactive target to its declared operating capability. Voltage and reactive-power control coordinate the AC operating condition of the microgrid resources. A voltage target, reactive-power target and power-factor target represent different control objectives and should have explicit ownership.","In an islanded microgrid, the assigned reference source supports bus voltage while other compatible resources share reactive demand according to the selected control method. Grid-connected operation can use a different objective at the PCC. For this reference, the drawing identifies “Reactive request and inverter limits” at the input and “Permitted reactive target” at the output. Active-power and thermal limits can reduce capability.","Show each measured quantity, target and resource capability limit. Control-loop tuning, equipment capability and parallel operation require a validated design rather than an assumed property of the symbol. 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: Reactive request and inverter limits. Identify its source device or document and the state represented on the drawing.","Follow the named output: Permitted reactive target. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Active-power and thermal limits can reduce capability.","Show each measured quantity, target and resource capability limit. Control-loop tuning, equipment capability and parallel operation require a validated design rather than an assumed property of the symbol."],"drawingChecklist":["Label the source and connection reference for reactive request and inverter limits.","Identify the destination and defined state of permitted reactive target.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Active-power and thermal limits can reduce capability."],"distinction":"Active-power and thermal limits can reduce capability. 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":"Reactive request and inverter limits"},{"label":"Output / connection","value":"Permitted reactive target"},{"label":"Lookup label","value":"MIRL is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-mg-power","relevance":"Public technical context for microgrid voltage and reactive-power 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":["grid-forming-inverter","statcom","microgrid-generator-excitation-reference-interface"],"artwork":"pi26-microgrid-inverter-reactive-capability-limiter","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-reactive","input":"Reactive request and inverter limits","output":"Permitted reactive target"},"plainEnglish":{"title":"What this block does","introduction":"Restrains the assigned inverter reactive target to its declared operating capability.","example":"In an islanded microgrid, the assigned reference source supports bus voltage while other compatible resources share reactive demand according to the selected control method. Grid-connected operation can use a different objective at the PCC. For this reference, the drawing identifies “Reactive request and inverter limits” at the input and “Permitted reactive target” at the output. Active-power and thermal limits can reduce capability.","drawings":"Start at the named input: Reactive request and inverter limits. Identify its source device or document and the state represented on the drawing. Follow the named output: Permitted reactive target. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Reactive request and inverter limits"},{"name":"Output","meaning":"Permitted reactive target"},{"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":["Reactive request and inverter limits","MIRL","Permitted reactive target"],"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-reactive"},"url":"https://eloragrid.ai/symbols/microgrid-inverter-reactive-capability-limiter","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-inverter-reactive-capability-limiter.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 voltage and reactive-power 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."}]}