# Microgrid site active-power setpoint allocator

Canonical URL: https://eloragrid.ai/symbols/microgrid-site-active-power-setpoint-allocator
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: MSASA
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: microgrids
Input: Site target and resource limits
Output: Resource active-power targets

Distributes the assigned site power target among resources with available control capacity.

## In plain English

### What this block does

Distributes the assigned site power target among resources with available control capacity.

### A simple 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 “Site target and resource limits” at the input and “Resource active-power targets” at the output. Allocation depends on resource capabilities and priorities.

### What the drawings help you do

Start at the named input: Site target and resource limits. Identify its source device or document and the state represented on the drawing. Follow the named output: Resource active-power targets. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Site target and resource limits
- Output: Resource active-power targets
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Site target and resource limits → MSASA → Resource active-power targets
A reading guide. The entry's original illustration and input/output facts describe this application.

- [Microgrid control systems](https://selinc.com/services/microgrids-power-management/microgrid-control-systems/)


## What it represents

Distributes the assigned site power target among resources with available control capacity. 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 “Site target and resource limits” at the input and “Resource active-power targets” at the output. Allocation depends on resource capabilities and priorities.
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.

## How to read it

- Start at the named input: Site target and resource limits. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Resource active-power targets. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Allocation depends on resource capabilities and priorities.
- 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.

## Information to show or reference

- Label the source and connection reference for site target and resource limits.
- Identify the destination and defined state of resource active-power targets.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Allocation depends on resource capabilities and priorities.

## Important distinction

Allocation depends on resource capabilities and priorities. 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: Site target and resource limits
- Output / connection: Resource active-power targets
- Lookup label: MSASA is a library lookup label, not a standard device designation.

## Public references

- [Microgrid control systems](https://selinc.com/services/microgrids-power-management/microgrid-control-systems/) — SEL. 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.

## 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.