Apps Market - Microgrid

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In this article you will learn how to use the Microgrid App

 

Introduction

This application allows you to track your NZEB building, analyzing the Energy Balance between the generation (ie: PV plant), storage and energy consumption of your sites.

Getting started

To start, you must install the app from the Market Apps of your account.

Once the App is installed, a new tab will appear in the locations settings of each location of your account called Microgrid Configuration:

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This is where the configuration of the app is done for each of the locations that you are willing to analyse.

Setup

First of all, you have to configure the Grid and the Load following these steps:

Grid

  1. Click on the + button of the main screen
  2. Add a configuration name for the grid device
  3. Select the device that contains the grid import data and the device that contains to the grid export data

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Load

  1. Click on the + button of the main screen
  2. Add a configuration name for the load device
  3. Select the device that contains the building load data and the device that contains the temperature data

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Once you have these 2 devices set up, you can add a Generation device and a Storage device, in case your NZEB building has storage.

Generation

  1. Click on the + button of the main screen
  2. Add a configuration name for the generation device
  3. Select the device that contains the PV Production data, the device that contains the Irradiation (parameter 338 - Solar Radiation Energy) and the device that contains the temperature data (parameter 701 - Device Temperature)
  4. Define the Installed PV Power by adding the Inverted Nominal Power, the Peak Power and the Performance Ratio Threshold of the PV Plant

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Storage

  1. Click on the + button of the main screen
  2. Add a configuration name for the storage device
  3. Select the device that contains the Charge data and the device that contains the Discharge data
  4. Define the Properties of the Storage device by adding the device that contains the State of charge information, the device that contains the temperature information, (parameter 701 - Device Temperature), the Nominal Voltage and the Capacity 

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And that's it, let's Analyse now!

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Analysis

There are 3 different main screens in the Analysis section of this app:


Energy Balance

The Energy Balance section is the main screen of the Analysis: the big summary of your NZEB Buildings.

The screen is divided into 2 sections: the graph and the summary table.

Graph

In this graph you can visualize and analyse many different bars of energy in any frequency, from 15min to monthly, and for the customized period that you select of the Location desired:

  • The Energy Generation of the site.
  • Main Loads of consumed energy of each site.
  • Grid imports, so the energy imported from the grid.
  • Grid exports, energy generated by the prosumer that is exported to the grid.
  • and finally the energy remainders. Ideally, the amount of positive energy (produced, from the grid...) should be equals to the negative energy (consumed, exported to the grid...). When this is not happening, the amount of energy that's left and it doesn't belong to anything that we are aware of, is located as remainder. The ideal reminder is therefore 0.

In case the prosumer's NZEB building has storage:

  • Battery charges of the Energy produced that your batteries are storing.
  • and battery discharges, so the use of the energy that your batteries are releasing.

Notice that on the top left of the graph you can change the visualization from stacked to lines or flow

You can also select and unselect the different parameters to visualize in the graph.

dexma-microgrid-energy-balance.gif

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Metrics

Self-consumption ratio is an indicator that you can visualize on the top right of the graph. It shows the percentage of renewable energy consumption VS your total building's consumption.

The self-consumption ratio represents the percentage of production that is converted into self-consumption (generation - grid export):

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where

  • load: data from the device selected in the Load section of the app configuration
  • grid importation: data from the device selected in the field "grid importation", in the Load section of the app configurationblobid0.png

 

 

Summary table

Under the graph, you can visualize 2 summary tables:

  • One shows the energy inputs, such as Grid Import, Production and Battery discharge (if it is the case).
  • And another one summarizing the energy outputs, such as Grid Export, Loads and Battery charge (if it is the case).

You can compare both groups of data with the Previous period or with the Same period last year.

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Storage

The Storage tab is only activated when your NZEB building has storage. Otherwise you will get a message indicating that you have no storages configured.

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In the graph of this screen you can visualize and analyse some battery status in any frequency, from 15min to monthly, and for the customized period that you select of the Location desired:

  • Battery discharges, identifying when the building has used the energy gathered from the batteries, on top of the energy produced and imported from the grid.
  • Battery charges, indicating the moments in which the batteries have been charged with produced energy that is not consumed at the moment.
  • The State of Charge, the level of charge of the battery relative to its capacity in percentage.
  • And the Battery's temperature, to analyse and prevent overloads.

Notice that you can select and unselect the different parameters to visualize in the graph.

dexma-microgrid-storage.gif

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Generation

In the Generation screen, you will be able to analyse more deeply the Energy Production of your NZEB buildings.

The screen is divided into 2 sections: the graph and the summary table.

Graph

In this graph you can visualize and analyse some parameters related to Generation in any frequency, from 15min to monthly, and for the customized period that you select of the Location desired:

  • Energy Production of the building.
  • External temperature gathered from a weather station.

In case the prosumer's NZEB building has PV production:

  • Module temperature to detect deviations in the Production.
  • Irradiation received on the selected location.
  • and the performance ratio of the PV plant, calculated taking into account the irradiation and the peak power.

Notice that you can select and unselect the different parameters to visualize in the graph.

dexma-microgrid-generation.gif

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Metrics

Performance ratio is an indicator that you can visualize in the Generation graph. It shows the relation between the actual and theoretical energy outputs of the PV plant.

This ratio is usually defined as the percentage of the theoretical generation potential that is converted into effective generation:

Captura_de_ecra__2020-06-15__a_s_16.40.38.png

which can be written equivalently:

Captura_de_ecra__2020-06-15__a_s_16.57.09.png

Peak sun hours can be calculated as it follows,

Captura_de_ecra__2020-06-15__a_s_16.41.14.png

Captura_de_ecra__2020-06-15__a_s_16.40.59.png

And these formulas, combined, give us the formula used in the platform to calculate the performance ratio:

Captura_de_ecra__2020-06-15__a_s_16.41.28.png

where

  • generation: data from the device configured in the field "PV production", in the generation section of the app configuration 
  • solar irradiation: calculated from the solar irradiance parameter, which corresponds to the device in the field "irradiation", in the generation section of the app configuration
  • peak power (in STC conditions): data from data introduced in the field peak power (kWh), in the generation section of the app configuration

 

The peak sun hours in the apps table is calculated with the formula:

Captura_de_ecra__2020-06-15__a_s_16.40.59.png

where

  • generation: data from the device configured in the field "PV production", in the generation section of the app configuration 
  • peak power (in STC conditions): value introduced in the field peak power (kWh), in the generation section of the app configuration

Summary table

Under the graph, you can visualize a summary table with some details (total, median, max, min) about each parameter visualized in the selected period.

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