# Islanded Operation of an Inverter-based Microgrid Using Droop Control Technique

**URL:** <https://community.opal-rt.com/t/islanded-operation-of-an-inverter-based-microgrid-using-droop-control-technique/99>\
**Category:** Models\
**Tags:** microgrid, model, sps-software, renewable-energy, artemis, droop-control\
**Created:** [July 9, 2026, 4:00pm UTC](https://community.opal-rt.com/t/islanded-operation-of-an-inverter-based-microgrid-using-droop-control-technique/99 "2026-07-09T16:00:00Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Parija](https://yyz2.discourse-cdn.com/flex012/user_avatar/community.opal-rt.com/parija/32/161_2.png) [@Parija](https://community.opal-rt.com/u/Parija)\
**Post date:** [July 9, 2026, 4:00pm UTC](https://community.opal-rt.com/t/islanded-operation-of-an-inverter-based-microgrid-using-droop-control-technique/99/1 "2026-07-09T16:00:00Z")

</div>

## Overview

Three parallel inverters operating in islanded mode with P/F and Q/V droop control plus supervisory frequency and voltage restoration.

This example demonstrates islanded operation of an inverter-based microgrid using droop control. It is a strong reference model for studying autonomous operation, power sharing, and voltage-frequency restoration without relying on PLL-based synchronization.

The microgrid contains three parallel inverters rated at 500 kW, 300 kW, and 200 kW. Each inverter includes a two-level converter, LC filter, 480/600 V transformer, DC source, and a complete control system. A dynamic load lets you apply realistic disturbances.

This model is excellent for both research and teaching. It illustrates core microgrid control concepts and gives users something immediately meaningful to discuss: droop tuning, load sharing quality, harmonic reduction, and secondary control performance.

## Key Features

- P/F and Q/V droop characteristics
- Power sharing proportional to inverter size
- Supervisory control to restore 60 Hz and 600 V nominal values
- Harmonic analysis possibilities using carrier phase variation

## Getting Started

1. Run the model and monitor inverter power sharing.
2. Observe the load increase at 1 s.
3. Watch droop control enable at 3 s.
4. See supervisory restoration take effect at 5 s.

## Model Specifications

| Parameter | Value |
| --- | --- |
| Product | SPS Software |
| Simulation type | Real-time |
| Software version | SPS Software 2025+ (with RT-LAB) |
| Recommended time step | Not published — switching content ~2700 Hz; confirm in model |
| Real-time solver | ARTEMiS (CPU real-time) |
| Compatible hardware | OP4605XG2, OP4610XG2, OP5020XG2, OP5025XG2, OP5033XG2, OP5707XG2 |
| Model file | Coming soon |

## Downloads

_The downloadable model package is coming soon._

[Microgrid\_IslandedOperation\_DroopControl.zip](https://community.opal-rt.com/uploads/short-url/tbh7vFz08PXarNowh6j6DSVRqPA.zip) (140.7 KB)

 ![MicroGridIslandedOperationExample_01](https://canada1.discourse-cdn.com/flex012/uploads/sps/original/1X/8006c5dde29aa229135ae349079915b23f01648b.png)

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<div class="post-metadata">

**Author:** ![Parija](https://yyz2.discourse-cdn.com/flex012/user_avatar/community.opal-rt.com/parija/32/161_2.png) [@Parija](https://community.opal-rt.com/u/Parija)\
**Post date:** [July 9, 2026, 4:00pm UTC](https://community.opal-rt.com/t/islanded-operation-of-an-inverter-based-microgrid-using-droop-control-technique/99/2 "2026-07-09T16:00:00Z")

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When you tune droop control in islanded systems, do you prioritize proportional load sharing, tighter voltage regulation, or harmonic performance first?