Glossary

EU's energy regulator - coordinates national regulators and sets common rules for the power market.

The receipt that says the message arrived. Its counterpart NACK says it was not accepted. Without one of them the sender knows nothing.

Adaptive Case Management - approach for handling complex, unpredictable processes where knowledge workers direct the flow rather than following a predefined process diagram.

Organisational psychologist at Wharton. 'Give and Take' shows that the people who give most end up both at the top and at the bottom, and the difference between them is worth understanding.

Advanced Distribution Management System - next-generation DMS with real-time management of distributed energy resources.

The Elhub market role that retrieves data on behalf of an end customer, with that customer’s consent. Tvimenning is approved in this role.

Development methodology where autonomous AI agents plan and execute multi-step tasks without manual intervention at each step.

Actor that pools flexibility resources from end users and trades them in the energy market.

Artificial Intelligence - technology that enables machines to perform tasks that normally require human intelligence, such as language understanding, pattern recognition, and decision-making.

An AI system that independently plans and executes multi-step tasks by using tools, making decisions and adapting along the way.

Services that keep the power system stable - frequency control, voltage regulation and short-circuit power - purchased by Statnett from producers and consumers.

Practice of managing API changes without breaking existing integrations - typically through URL versioning (/v1/, /v2/).

Open OASIS standard for secure message exchange over HTTP - the transport protocol required by Peppol, increasingly seen in European power-market messaging too.

Communication or programming pattern where processes do not need to wait for each other - used in message-based systems and event-driven architecture.

Stationary battery installations (BESS) that store electrical energy to balance production and consumption in the power system.

Someone you have agreed with in advance to help in a crisis. Named word of the year 2024 by the Norwegian Language Council, and used by Norway's civil protection agency about household preparedness.

Battery Energy Storage System - technology for storing electrical energy in batteries to balance production and consumption.

Messages travel directly between two parties, without passing through a shared hub. The opposite of the centralised model Elhub is built on. Also called point-to-point.

Balance Responsible Party - actor responsible for balancing production and consumption in its portfolio against the system operator.

EU directive on resilience of critical entities - sets requirements for protecting critical infrastructure against physical threats.

The common grid model - the assembled data set European TSOs agree on, built from each area's own model and used as the basis for capacity calculation and operational security analysis across borders.

Anthropic's AI coding assistant - integrated into the terminal and IDEs for agentic software development.

Domain knowledge and technical skills - a core value for Tvimenning and a prerequisite for delivering quality in the energy sector.

A replaceable part inside a fixed asset. It has its own age, its own history and its own service life - independent of the asset it sits in.

Measures and processes for managing situations where demand for grid capacity exceeds supply - between bidding zones or within the distribution network.

Customer Relationship Management system for managing customer relations, sales processes and support tasks.

Conversion Rate Optimization - structured work to increase the percentage of website visitors completing desired actions.

Formal representation of data structure, relationships and constraints - foundation for database design and system messages.

The Elhub market role a grid company holds for submitting market messages to Elhub. Tvimenning is approved in this role.

The Elhub market role a supplier holds for market messages and retrieving meter values for billing.

Reduction or shifting of electricity consumption in response to price signals or the system operator's request - an important flexibility resource.

Distributed Energy Resource Management System - system for managing distributed energy resources such as solar panels, batteries and electric vehicles.

Tvimenning's internal self-developed platform for agentic software development with Claude Code - demonstrates that we dogfood our own methods.

Distribution Management System - system for real-time monitoring and control of the distribution network.

Containerisation platform that packages applications and dependencies in isolated, reproducible units.

The data processing agreement GDPR Article 28 requires between a controller and a processor - regulates what the vendor is allowed to do with personal data.

Nordic profile of the EDI EDIFACT standard - used for electronic message exchange in the Nordic power market via Elhub.

The six characters in UTILMD, INVOIC and CONTRL are not abbreviations someone invented locally. Each message type is its own standard in the UN EDIFACT directory, and the name is a six-character mnemonic.

The name of the XSD set that defines the message formats towards Elhub. It is versioned, and the version number is what decides whether two systems speak the same language.

Energy Management System - system for monitoring, control and optimisation of energy consumption in buildings or industry.

Microsoft's cloud-based identity and access management platform - formerly known as Azure Active Directory (Azure AD).

Energy Trading and Risk Management - system for trading, portfolio management and risk analysis in the energy market.

Forvaltning, drift og vedlikehold: asset management, operation and maintenance. The Norwegian collective term for everything that has to follow an installation through its life: what is there, how it is run and what has been done to it.

System for planning, assigning and following up work carried out in the field - meter changes, component installation and inspections.

Finland's transmission system operator - owns and operates the Finnish high-voltage grid and runs the Finnish Datahub.

Physical equipment owned and used over time - transformer, cable, breaker. It has both a technical and an accounting side, and the two rarely agree.

Actor that collects and activates flexibility resources from end users for participation in the balancing market.

Market where end users and aggregators can sell flexibility to grid operators and the system operator.

General Data Protection Regulation - EU's data protection regulation, applicable in Norway via the EEA Agreement.

Google's family of large language models (LLM) - integrated in Google Cloud and Workspace for AI-assisted work processes.

The transition from test to live operation against Elhub. The final step in the approval process, and the only one that cannot be undone without someone noticing.

Query language for APIs where the client determines exactly which data it needs - alternative to REST.

NVE's framework for grid tariff calculation - contains fixed, energy, and capacity components to fairly distribute grid costs and encourage balanced consumption.

Tvimenning’s EDI server for bilateral message exchange: receives, translates, routes and acknowledges messages between companies and marketplaces.

The framework that wraps, drives, tests and constrains an AI agent. The model supplies the power; the harness decides where it goes.

Head-End System - central system for collecting and managing data from smart meters in AMI networks.

Not an acronym, but the Norwegian word "hevd" - a legal right you must keep in continuous use for it to hold. Tvimenning's managed service for data quality, across the entire system landscape.

Electricity produced from the potential energy of falling water - Norway's dominant energy source (~90% of production) with a unique ability to ramp up and down quickly.

Property of operations where repeated execution yields the same result - critical for reliable message handling in distributed systems.

Management of IT infrastructure through machine-readable configuration files rather than manual processes.