What is the OpenGEH (Green Energy Hub) Project

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The OpenGEH Project is one of the many projects at LF Energy. We want to share about it here on the LF blog. This originally appeared on the LF Energy site

OpenGEH ( GEH stands for Green Energy Hub ) enables fast, flexible settlement and hourly measurements of production and consumption of electricity. OpenGEH seeks to help utilities to onboard increased levels of renewables by reducing the administrative barriers of market-based coordination. By utilizing a modern DataHub, built on a modular and microservices architecture, OpenGEH is able to store billions of data points covering the entire workflow triggered by the production and consumption of electricity.

The ambition of OpenGEH is to use digitalization as a way to accelerate a market-driven transition towards a sustainable and efficient energy system. The platform provides a modern foundation for both new market participants and facilitates new business models through digital partnerships. The goal is to create access to relevant data and insights from the energy market and thereby accelerate the Energy Transition.

Initially built in partnership with Microsoft, Energinet (the Danish TSO) was seeking a critical leverage point to accelerate the Danish national commitment to 100% renewable energy in their electricity system by 2030. For most utilities, getting renewables onboard creates a technical challenge that also has choreography and administrative hurdles. Data becomes the mechanism that enables market coordination leading to increased decarbonization. The software was contributed to the LF Energy Foundation by Energinet.

Energinet sees open source and shared development as an opportunity to reduce the cost of software, while simultaneously increasing the quality and pace of development. It is an approach that they see gaining prominence in TSO cooperation. Energinet is not an IT company, and therefore does not sell systems, services, or operate other TSOs. Open source coupled with an intellectual property license that encourages collaboration, will insure that OpenGEH continues to improve, by encouraging a community of developers to add new features and functionality.


The Architectural Principles behind OpenGEH

By implementing Domain Driven Design, OpenGEH has divided the overall problem  into smaller independent domains. This gives developers the possibility to only use the domains that are necessary to solve for the needed functionality. As the domains trigger events when data changes, the other domains listen on these events to have the most updated version of data.

The architecture supports open collaboration on smaller parts of OpenGEH. New domains can be added by contributors, to extend the OpenGEH’s functionality, when needed to accelerate the green transition.

The Green Energy Hub Domains

The Green Energy Hub system consists of two different types of domains:

  • A domain that is responsible for handling a subset of business processes.
  • A domain that is responsible for handling an internal part of the system (Like log accumulation, secret sharing or similar).

Below is a list of these domains, and the business flows they are responsible for.

  • Business Process Domains
    • Metering Point
      • Create metering point
      • Submission of master data – grid company
      • Close down metering point
      • Connection of metering point with status new
      • Change of settlement method
      • Disconnection and reconnecting of metering point
      • Meter management
      • Update production obligation
      • Request for service from grid company
    • Aggregations
      • Submission of calculated energy time series
      • Request for historical data
      • Request for calculated energy time series
      • Aggregation of wholesale services
      • Request for aggregated tariffs
      • Request for settlement basis
    • Time Series
      • Submission of metered data for metering point
      • Send missing data log
      • Request for metered data for a metering point
    • Charges
      • Request for aggregated subscriptions or fees
      • Update subscription price list
      • Update fee price list
      • Update tariff price list
      • Request price list
      • Settlement master data for a metering point – subscription, fee and tariff links
      • Request for settlement master data for metering point
    • Market Roles
      • Change of supplier
      • End of supply
      • Managing an incorrect change of supplier
      • Move-in
      • Move-out
      • Incorrect move
      • Submission of customer master data by balance supplier
      • Initiate cancel change of supplier by customer
      • Change of supplier at short notice
      • Mandatory change of supplier for metering point
      • Submission of contact address from grid company
      • Change of BRP for energy supplier
    • Data Requests
      • Master data request
  • System Domains