This deliverable lists the qualitative set of requirements for the Meshed Offshore Grid (MOG) that is used throughout the project.

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Deliverable 1.2 has the general objective of defining the requirements that should be met by an offshore HVDC grids and the wind farms connected to it.

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This deliverable brings together existing studies of offshore meshed HVDC grids and synthesizing them in order to create a baseline.

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The newly released deliverable 1.4 of Work Package 1 has the purpose to provide relevant scenarios for potential installed wind capacities in the Northern Seas and load/generation of surrounding countries based on available informatio.

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Deliverable 1.5 contains definitions of which requirements are quantifiable and presents a list of the quantified requirements of a Meshed Offshore Grid (MOG).

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Deliverable 1.6 develops a draft offshore grid expansion roadmap for the evacuation of offshore wind energy from the North Sea during the decade 2020-2030. It also studies the economic viability of HVDC offshore meshed grids by comparing their costs and benefits with radial point-to-point connections of offshore wind farms.

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This deliverable lists the updated and evaluated qualitative and quantitative set of requirements for the Meshed Offshore Grid (MOG) that is used throughout the project. The work packages within PROMOTioN set out to address various interdependent barriers. Alignment of the project deliverables is enhanced by early agreement on requirements and identification of the gaps to be addressed in Work Package 1. In this Deliverable 1.7, the requirements are updated from previous deliverables D1.1 and D1.5, following updates from various Work Packages.

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In this deliverable, a set of requirements for the DRU (Diode Rectifier Unit) connected offshore wind farm is given as a basis for the control and compliance procedure development in Work Package 3.

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Deliverable 3.2 has main objective to identify and specify appropriate analyses and tests to demonstrate the interoperability of wind turbine and wind power plant controls with two different types of HVDC systems: diode rectifiers and VSC converters respectively to connect the wind power plants to the DC network.

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This deliverable is part of Task General Control Algorithms, which includes the simulation results of the DRHVDC system in normal operation and during faults. It shows the considered general OWFs connected with point-to-point DR-HVDC link and presents the results of the DR-HVDC system during normal operation, which covers energization, connection and disconnection of the offshore AC grid, operating point dynamic changing in different configurations as specified in D3.2. The ancillary services provided by the DR-HVDC system is addressed in D3.5. Furthermore it focuses on the fault ride-through and protection of the DR-HVDC system and various fault cases are analysed, i.e., onshore grid fault, DC cable fault, internal DRU fault, umbilical AC cable fault, and offshore fault. The performances of the DR-HVDC during the fault and after fault isolation are addressed.

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This deliveable includes the specification of control strategies, definition of test cases, implementation of control strategies and test cases, and stability assessment and tuning of controllers. It covers the assessment of the capabilities of offshore wind farms (offshore WFs, OWFs) to contribute in the provision of ancillary services to onshore alternating-current (AC) networks by means of active power modulation, when connected through high-voltage direct-current (HVDC) links having diode rectifier (DR) offshore terminals and voltage source converter (VSC) onshore terminals. In doing so, the compatibility of corresponding higher-level controls previously devised for VSC-HVDC-connected OWFs is examined.

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In this deliverable, a method for shallow assessment of fault clearing strategies is developed and used to benchmark the fault clearing strategies available in the literature.

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This deliverable looking at the test environment of HVDC circuit breakers targets the HVDC network fault analysis.

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This deliverable provides a fault stress analysis of HVDC circuit breakers within Work Package 5, which looks at the test environment of HVDC circuit breakers.

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To date, there is no international standard describing the requiremensts, applicable tests and test procedures of HVDC circuit breaker. This document provides a general guideline for list of tests that shall be applied to HVDC circuit breakers for its operation and performance verification. Since there is no international standard for HVDC circuit breakers, the document is compiled using AC circuit breaker standards, CIGRE technical brochures, VSC converter valve standard and Chinese draft standard for HVDC circuit breakers as references.

Download Deliverable 5.4 (PDF 1.1 MB)

This document provides general information and guidelines for conducting tests of HVDC circuit breakers. In order to verify the test requirements defined in deliverable 5.4, the type of tests and sequence of execution, number of tests and pass/fail criteria are described.

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This document provides an overview and comparison of the various test circuits and their limitations, which can be used to realise the current breaking test requirements and procedures discussed in D5.4 and D5.5, respectively. The test circuits’ performance is compared to the test requirements. Methods to set-up and tune the test circuits’ parameters are presented. Approaches such as multi-part testing unit testing and synthetic testing, which seek to maximally test functionality and verify ratings within the test circuit’s limitations, are discussed.

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The main objective of this deliverable is developing system level models for selected hybrid DC CBs in PSCAD and EMTP.

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The objective this deliverable is the development of a PSCAD system-level model of the mechanical DC circuit breaker with active current injection.

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The present deliverable elaborates the current legal framework for offshore wind and grid development on international, European and national level. It is shown that often, the legal framework needs to be adapted in order to facilitate the development of a meshed offshore electricity grid. This is because offshore wind and offshore grid connections have developed strongly in the past few years while the legal framework lags behind. It becomes clear that while solutions have been sought in order to facilitate offshore wind, hybrid solutions that combine interconnection with offshore wind connection are often not yet supported by legal frameworks.

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This deliverable focuses on the development of an economic framework for the offshore grid in terms of three building blocks namely: planning, investment, and operation.

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The aim of D7.5 is to identify and propose appropriate recommendations to facilitate investments in a meshed offshore electricity transmission grid in the North Sea. Based on research on the current financing of onshore and offshore electricity transmission grids in the European Union (EU), the investigation and comparison with international practices and the identification of the main financial challenges and investment barriers, a set of recommendations will be developed to overcome these challenges and the investment gaps.

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‘Stakeholder Interaction’ in the context of PROMOTioN is a component of the stakeholder management of the project. It can be described as a support process for the overall project dissemination and stakeholder management activities. It defines ways and means to engage with stakeholders, e.g. from industry, policy, academia and associations, over the entire project’s duration and allows for direct feedback. While measures such as a project newsletter or a project website are both means of stakeholder management, stakeholder interaction goes beyond this, and fosters direct and bilateral communication measures. This can be achieved via workshops & discussions, surveys, face-to-face cooperation and communication with stakeholders.

Download Deliverable 7.7 (PDF 1.5 MB)

To understand the economic and social consequences of undertaking an offshore grid development in a particular region, it is necessary to perform a cost benefit analysis to assess the value and costs of the meshed offshore grid to society. In order to perform this cost-benefit analysis, a CBA methodology should be employed that sets out a clear set of guidelines to ensure a thorough assessment and comparison of alternative offshore grid solutions.

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The main objective of Deliverable D12.1 is to provide a preliminary analysis on key technical, financial, economic, legal, regulatory and market barriers and direction for solutions. These solutions are currently being analysed more deeply by the different Work Packages (WPs) of the PROMOTioN project. The analyses gives a snapshot of the results to date and will be refined in the upcoming deliverables12.2 and 12.3. In order to provide a preliminary analysis of barriers hampering the development of a HVDC Meshed Offshore Grid (MOG) and a preliminary related portfolio of solutions, this deliverable looks at:

  • The conceptual building blocks for analysing challenges to the future offshore grid as identified in the different Work Packages (WPs) and possible Concepts for a future offshore grid;
  • The work in various WPs, to analyse the specific barriers and related solutions, is ongoing.

Download Deliverable 12.1 (PDF 3.5 MB)

This deliverable provides the executive summary of the project interim report and gives an overview of the work done within the PROMOTioN project.

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This deliverable provides the executive summary of the second reporting period from January 2017 - June 2018. It summarises the project interim report and gives an overview of the work done within the PROMOTioN project in the mentioned period.

Download Deliverable 13.5 - Reporting Period January 2017 - June 2018 (PDF 117 KB)

Today, the experience regarding the operation and control of meshed DC grids as well as their interaction with AC transmission systems and offshore wind farms is limited. To enhance the confidence in the controllability of such systems, a DC network demonstrator embedded in a real-time simulation environment of wind farms and AC grids is set up within work package 16. Furthermore, the resonance behaviour of a wind turbine converter from a leading manufacturer and the demonstrator’s multilevel converters will be analysed. Deliverable 16.1 specifies all test cases, which will be considered in this context.

Download Deliverable 16.1 (PDF 1.27 MB)