# Microgrid PV source-loss detection interface Canonical URL: https://eloragrid.ai/symbols/microgrid-pv-source-loss-detection-interface Publisher: Elora Grid Updated: 2026-11-03 Lookup label: MPSDI Drawing use: Schematic Reference families: Manufacturer Representation: Functional block Installation focus: microgrids Input: PV connection and power status Output: PV unavailable indication Reports the defined loss of the assigned PV resource to the power-balancing controller. ## In plain English ### What this block does Reports the defined loss of the assigned PV resource to the power-balancing controller. ### 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 connection and power status” at the input and “PV unavailable indication” at the output. Low irradiance and disconnected equipment differ. ### What the drawings help you do Start at the named input: PV connection and power status. Identify its source device or document and the state represented on the drawing. Follow the named output: PV unavailable indication. Cross-reference its destination and separate the command from confirmation that the equipment responded. ### Terms - Input: PV connection and power status - Output: PV unavailable indication - Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections. Concept diagram: PV connection and power status → MPSDI → PV unavailable indication 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 Reports the defined loss of the assigned PV resource to the power-balancing controller. 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 connection and power status” at the input and “PV unavailable indication” at the output. Low irradiance and disconnected equipment differ. 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 connection and power status. Identify its source device or document and the state represented on the drawing. - Follow the named output: PV unavailable indication. Cross-reference its destination and separate the command from confirmation that the equipment responded. - Low irradiance and disconnected equipment differ. - 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 connection and power status. - Identify the destination and defined state of pv unavailable indication. - Record the equipment or control-document revision supporting this functional block. - Check this application limit in the project design: Low irradiance and disconnected equipment differ. ## Important distinction Low irradiance and disconnected equipment differ. 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 connection and power status - Output / connection: PV unavailable indication - Lookup label: MPSDI 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.