DC and AC/DC hybrid transmission and distribution systems

Grant Name
DC and AC/DC hybrid transmission and distribution systems
Horizon Europe Framework Programme (HORIZON)
European Commission
Research Field
Societal Engagement
Digital Agenda
Energy systems (production, distribution, applicat
International Cooperation
2024-01-16 (Expired)
Grant Size

General conditions

1. Admissibility conditions: described in Annex A and Annex E of the Horizon Europe Work Programme General Annexes

Proposal page limits and layout: described in Part B of the Application Form available in the Submission System

2. Eligible countries: described in Annex B of the Work Programme General Annexes

A number of non-EU/non-Associated Countries that are not automatically eligible for funding have made specific provisions for making funding available for their participants in Horizon Europe projects. See the information in the Horizon Europe Programme Guide.

3. Other eligibility conditions: described in Annex B of the Work Programme General Annexes

If projects use satellite-based earth observation, positioning, navigation and/or related timing data and services, beneficiaries must make use of Copernicus and/or Galileo/EGNOS (other data and services may additionally be used).

4. Financial and operational capacity and exclusion: described in Annex C of the Work Programme General Annexes

5. Evaluation and award:

  • Award criteria, scoring and thresholds are described in Annex D of the Work Programme General Annexes

  • Submission and evaluation processes are described in Annex F of the Work Programme General Annexes and the Online Manual

  • Indicative timeline for evaluation and grant agreement: described in Annex F of the Work Programme General Annexes

6. Legal and financial set-up of the grants: described in Annex G of the Work Programme General Annexes

Specific conditions

7. Specific conditions: described in the [specific topic of the Work Programme]


Call documents:

Standard application form — call-specific application form is available in the Submission System

Standard application form (HE RIA, IA)

Standard evaluation form — will be used with the necessary adaptations

Standard evaluation form (HE RIA, IA)


HE General MGA v1.0

Additional documents:

HE Main Work Programme 2023–2024 – 1. General Introduction

HE Main Work Programme 2023–2024 – 8. Climate, Energy and Mobility

HE Main Work Programme 2023–2024 – 13. General Annexes

HE Programme Guide

HE Framework Programme and Rules for Participation Regulation 2021/695

HE Specific Programme Decision 2021/764

EU Financial Regulation

Rules for Legal Entity Validation, LEAR Appointment and Financial Capacity Assessment

EU Grants AGA — Annotated Model Grant Agreement

Funding & Tenders Portal Online Manual

Funding & Tenders Portal Terms and Conditions

Funding & Tenders Portal Privacy Statement

Grant Number

Project results are expected to contribute to all the following outcomes:

  • Demonstrated top-down electricity system orchestration of future pan-European AC / DC hybrid system architecture - including offshore grid and energy islands - at different voltage levels (HVDC, MVDC, LVDC) down to DC microgrids.
  • Developed methodologies for operational planning and design of DC and AC / DC hybrid systems, considering all possible sources, loads and storage, from high-voltage transmission level to distribution-connected assets. This includes a cost benefit analysis for stability management options.
  • Developed methodologies and requirements for interoperability among Multi Terminal, Multi-Vendor MVDC and LVDC systems.
  • Demonstrated technologies to be applied to the energy system to address the gradual loss of inertia caused by the increasing penetration of Power Electronics Interfaced Generators (i.e., RES such as PV, Wind, etc.).
  • Demonstrated DC transmission and distribution systems and technologies.
  • Components and systems for smart substations.
  • Close collaboration among the key grid stakeholders (non-exhaustive list: software developers, system manufacturers, TSOs, third-party system integrators, wind turbine manufacturers, offshore wind farm developers, PV plants, storage systems, etc.).


Projects are expected to implement the activities in (1) and the practical demonstration in (2) as described below:

  1. R&I, methodologies and tools involving the activities in the three subtopics (A, B and C) listed below. These can be developed/complemented with others pertinent to each sub-topic.

A) DC – AC / DC hybrid system Design & Planning

a. Demonstration of software tools for transnational AC/DC hybrid power system planning and management to enable HVAC/HVDC/MVDC/LVDC hybrid systems, such as:

  • integration of multi-terminal HVDC systems, both offshore and onshore and HVDC links embedded within the HVAC network as well as HVDC ties (inter-) connecting different control zones and synchronous areas (in full or in back-to-back schemes);
  • representation and modelling of transmission and distribution grids as well as multi-energy vector integration (sector coupling) for long-term and for transient and dynamic analysis.

b. Demonstration of reliability and resilience methodologies to address security and adequacy issues and criteria via not only deterministic but also probabilistic (e.g., Monte-Carlo) methods.

c. Demonstration of developed methodologies and requirements for interoperability among Multi Terminal, Multi-Vendor MVDC and LVDC systems.

B) AC and DC Grid Forming Capability

  • Functional requirements and demonstration of grid forming capability for hybrid HV AC/DC networks (e.g., offshore wind, HVDC transmission or multi-terminal HVDC grid, potentially associated with energy storage systems).
  • Functional requirements and demonstration of grid forming capability for hybrid MV and LV AC/DC networks (grid connected and islanded operation with distributed energy sources).
  • Functional requirements and validation procedure for testing grid-forming capabilities offered by HVDC, MVDC and LVDC systems.

C) DC Distribution & microgrids

  • Modelling (steady state and transient models) for systems including different typology of RES, EVs, storage and loads (system architecture, voltage level, control, stability, protection, and storage integration).
  • Planning and design of MVDC distribution grids as the intermediate layer between the HVDC and the AC or DC Low Voltage local distribution grid and loads.
  • Functional requirements for the AC-DC converters, DC-DC converters, switchgear (including protection equipment) and cables based on the different typologies and power rating applications

2. Demonstration, test and validation of the activities developed in (1) in at least three pilots – one for each sub-topic (A, B and C) – in different EU Member States/Associated Countries.

International cooperation with countries of the Mediterranean Region is encouraged.

Specific Topic Conditions:

Activities are expected to achieve TRL 4-5 by the end of the project – see General Annex B.

Funding resources

Purdue Grant Writing Lab: Introduction to Grant Writing Open Link
University of Wisconsin Writing Center: Planning and Writing a Grant Proposal Open Link

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