# Microgrid PV active-power curtailment request Canonical URL: https://eloragrid.ai/symbols/microgrid-pv-active-power-curtailment-request Publisher: Elora Grid Updated: 2026-11-03 Lookup label: MPACR Drawing use: Schematic Reference families: Manufacturer Representation: Functional block Installation focus: microgrids Input: PV dispatch restraint Output: PV power-limit command Requests the assigned inverter reduction when the microgrid cannot accept the available solar generation. ## In plain English ### What this block does Requests the assigned inverter reduction when the microgrid cannot accept the available solar generation. ### A simple example In a microgrid with solar generation, the controller can restrain inverter output when local load and storage cannot absorb the available power. The resource controller reports its own availability and accepted operating limits. For this reference, the drawing identifies “PV dispatch restraint” at the input and “PV power-limit command” at the output. The inverter must support the accepted control interface. ### What the drawings help you do Start at the named input: PV dispatch restraint. Identify its source device or document and the state represented on the drawing. Follow the named output: PV power-limit command. Cross-reference its destination and separate the command from confirmation that the equipment responded. ### Terms - Input: PV dispatch restraint - Output: PV power-limit command - Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections. Concept diagram: PV dispatch restraint → MPACR → PV power-limit command A reading guide. The entry's original illustration and input/output facts describe this application. - [Microgrid processing and control functions](https://productinfo.se.com/esxp_digital_apps_iec/mg/English/BM_ESXP_DG_Microgrid_IEC_0001122076.xml/%24/ESXP_DG_MG_SD_Processing_0001125595) ## What it represents Requests the assigned inverter reduction when the microgrid cannot accept the available solar generation. Renewable-generation coordination connects variable resource availability, inverter operating limits and the microgrid power target. Available solar or wind power, an issued curtailment request and actual delivered power are different signals. In a microgrid with solar generation, the controller can restrain inverter output when local load and storage cannot absorb the available power. The resource controller reports its own availability and accepted operating limits. For this reference, the drawing identifies “PV dispatch restraint” at the input and “PV power-limit command” at the output. The inverter must support the accepted control interface. Identify the point where power is measured and the system declaring each availability or limit signal. Resource forecasts and controller requests do not guarantee the delivered generation at every instant. 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. ## How to read it - Start at the named input: PV dispatch restraint. Identify its source device or document and the state represented on the drawing. - Follow the named output: PV power-limit command. Cross-reference its destination and separate the command from confirmation that the equipment responded. - The inverter must support the accepted control interface. - Identify the point where power is measured and the system declaring each availability or limit signal. Resource forecasts and controller requests do not guarantee the delivered generation at every instant. ## Information to show or reference - Label the source and connection reference for pv dispatch restraint. - Identify the destination and defined state of pv power-limit command. - Record the equipment or control-document revision supporting this functional block. - Check this application limit in the project design: The inverter must support the accepted control interface. ## Important distinction The inverter must support the accepted control interface. 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 - Representation: Functional block - Installation focus: Microgrids - Input / boundary: PV dispatch restraint - Output / connection: PV power-limit command - Lookup label: MPACR is a library lookup label, not a standard device designation. ## Public references - [Microgrid processing and control functions](https://productinfo.se.com/esxp_digital_apps_iec/mg/English/BM_ESXP_DG_Microgrid_IEC_0001122076.xml/%24/ESXP_DG_MG_SD_Processing_0001125595) — Schneider Electric. Public technical context for microgrid renewable-generation interfaces. Renewable generation dispatch and microgrid source coordination. The application text and educational graphic are independently authored; the publisher does not certify this representation. ## Graphic scope Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.