# Microgrid dispatch tracking-error monitor

Canonical URL: https://eloragrid.ai/symbols/microgrid-dispatch-tracking-error-monitor
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: MDTM
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: microgrids
Input: Power request and measurement
Output: Power tracking error

Compares the assigned active-power request with the measured resource response.

## In plain English

### What this block does

Compares the assigned active-power request with the measured resource response.

### 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 “Power request and measurement” at the input and “Power tracking error” at the output. Measurement timing must be considered.

### What the drawings help you do

Start at the named input: Power request and measurement. Identify its source device or document and the state represented on the drawing. Follow the named output: Power tracking error. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Power request and measurement
- Output: Power tracking error
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Power request and measurement → MDTM → Power tracking error
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

Compares the assigned active-power request with the measured resource response. 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 “Power request and measurement” at the input and “Power tracking error” at the output. Measurement timing must be considered.
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: Power request and measurement. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Power tracking error. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Measurement timing must be considered.
- 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 power request and measurement.
- Identify the destination and defined state of power tracking error.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Measurement timing must be considered.

## Important distinction

Measurement timing must be considered. 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: Power request and measurement
- Output / connection: Power tracking error
- Lookup label: MDTM 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.