MGC
Microgrid controller
The supervisory controller that dispatches sources, storage and loads and manages islanding and reconnection of a microgrid.
SLD / Schematic
Functional block · MRHS
Microgrid resource heartbeat supervisor
Functional block · Microgrids
An independently authored application reference. The drawing shows the named function or circuit relationship; use the project legend and selected equipment documentation for its drafting form and connections.
Browse this installation focusIn plain English
What this block does
Monitors the declared periodic health indication of the assigned resource controller.
A simple example
In a microgrid control room, the operator can see source availability, active constraints and current operating mode. A communication failure should remain distinguishable from an electrical resource failure. For this reference, the drawing identifies “Resource heartbeat and time” at the input and “Controller communication-health state” at the output. A heartbeat does not establish electrical availability.
What the drawings help you do
Start at the named input: Resource heartbeat and time. Identify its source device or document and the state represented on the drawing. Follow the named output: Controller communication-health state. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Input
- Resource heartbeat and time
- Output
- Controller communication-health state
- Application reference
- An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.
Read the source: Microgrid control systems
Schematic · MRHS
What it represents
Monitors the declared periodic health indication of the assigned resource controller. Microgrid supervision coordinates measurements, control authority and resource communication without replacing local protection. Each resource value needs a named measurement boundary, freshness condition and intended control use.
In a microgrid control room, the operator can see source availability, active constraints and current operating mode. A communication failure should remain distinguishable from an electrical resource failure. For this reference, the drawing identifies “Resource heartbeat and time” at the input and “Controller communication-health state” at the output. A heartbeat does not establish electrical availability.
Identify signal ownership, quality flags, control priority and loss-of-data behavior. These functional references do not certify cyber security, closed-loop performance or equipment interoperability. 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: Resource heartbeat and time. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Controller communication-health state. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- A heartbeat does not establish electrical availability.
- Identify signal ownership, quality flags, control priority and loss-of-data behavior. These functional references do not certify cyber security, closed-loop performance or equipment interoperability.
Information to show or reference
- Label the source and connection reference for resource heartbeat and time.
- Identify the destination and defined state of controller communication-health state.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: A heartbeat does not establish electrical availability.
A distinction that matters
A heartbeat does not establish electrical availability. 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.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Microgrid control systems
Public technical context for microgrid supervisory and communication interfaces. 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.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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