{"schemaVersion":1,"slug":"microgrid-black-start-energy-reserve-gate","name":"Microgrid black-start energy-reserve gate","kind":"symbol","abbreviation":"MBEG","aliases":["Microgrid black-start and restoration controls","microgrids Microgrid black-start and restoration controls","microgrids","Microgrids","Starting-source energy availability","Restoration energy permission"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Checks the declared stored-energy or fuel readiness required by the assigned restoration strategy.","description":["Checks the declared stored-energy or fuel readiness required by the assigned restoration strategy. Black-start and restoration control coordinates the establishment of an electrical reference and the gradual return of assigned resources and loads. A dead system, an available starting source and a successful load restoration are distinct states.","In a microgrid recovering from a blackout, an available grid-forming source can establish the assigned island reference before compatible generation and eligible load groups are introduced under the validated restoration strategy. For this reference, the drawing identifies “Starting-source energy availability” at the input and “Restoration energy permission” at the output. Power capability is a separate requirement.","Show the prerequisites and confirmation at each control boundary. These original explanatory blocks are not an operating procedure; energization, protection, transformer inrush and motor reacceleration require system-level validation. 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: Starting-source energy availability. Identify its source device or document and the state represented on the drawing.","Follow the named output: Restoration energy permission. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Power capability is a separate requirement.","Show the prerequisites and confirmation at each control boundary. These original explanatory blocks are not an operating procedure; energization, protection, transformer inrush and motor reacceleration require system-level validation."],"drawingChecklist":["Label the source and connection reference for starting-source energy availability.","Identify the destination and defined state of restoration energy permission.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Power capability is a separate requirement."],"distinction":"Power capability is a separate requirement. 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":"Starting-source energy availability"},{"label":"Output / connection","value":"Restoration energy permission"},{"label":"Lookup label","value":"MBEG is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-mg-study","relevance":"Public technical context for microgrid black-start and restoration controls. Storage, protection, black start, load restoration and coordinated island operation. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["grid-forming-inverter","microgrid-controller","microgrid-initial-reference-establishment-request"],"artwork":"pi26-microgrid-black-start-energy-reserve-gate","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-restoration","input":"Starting-source energy availability","output":"Restoration energy permission"},"plainEnglish":{"title":"What this block does","introduction":"Checks the declared stored-energy or fuel readiness required by the assigned restoration strategy.","example":"In a microgrid recovering from a blackout, an available grid-forming source can establish the assigned island reference before compatible generation and eligible load groups are introduced under the validated restoration strategy. For this reference, the drawing identifies “Starting-source energy availability” at the input and “Restoration energy permission” at the output. Power capability is a separate requirement.","drawings":"Start at the named input: Starting-source energy availability. Identify its source device or document and the state represented on the drawing. Follow the named output: Restoration energy permission. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Starting-source energy availability"},{"name":"Output","meaning":"Restoration energy permission"},{"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":["Starting-source energy availability","MBEG","Restoration energy permission"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Avista Shared Energy Economy microgrid protection and control case study","url":"https://selinc.com/api/download/135486/"}],"profileId":"power-installation-microgrid-restoration"},"url":"https://eloragrid.ai/symbols/microgrid-black-start-energy-reserve-gate","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-black-start-energy-reserve-gate.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-study","publisher":"SEL","title":"Avista Shared Energy Economy microgrid protection and control case study","url":"https://selinc.com/api/download/135486/","scope":"Storage, protection, black start, load restoration and coordinated island operation.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for microgrid black-start and restoration controls. Storage, protection, black start, load restoration and coordinated island operation. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}