Angle-DC

About the Project

This innovative project will adapt existing electronic technologies to build Medium Voltage DC (MVDC) link. This will smooth the way for the integration of increasing volumes of renewable generation and accommodate the growth of electricity demand. Angle-DC is building confidence in deploying MVDC technologies by other UK Distribution Network Operators and triggering the MVDC supply chain.

Project Objectives

• Trial the first flexible MVDC link in the Great Britain (GB) distribution system.
• Trial conversion of an AC circuit to DC operation to enhance circuit capacity.
• Trial real-time holistic circuit condition monitoring of a DC circuit converted from AC to provide the evidence and confidence for DNOs.
• Provide real-life data on MVDC converter operation under various loading conditions.
• Provide real-life data on cable ageing mechanism.
• Develop technical guidance, recommendations and policy documents for planning, procurement, operation and control strategy of MVDC converters and MVDC links.
• Create a supply chain and stimulate a competitive MVDC market.
• To bridge the gap between transmission network and low voltage distribution DC technologies.
• Explore the feasibility of Angle-DC.

The Benefits For Customers

• Increasing the capacity for load and generation connections. Reduced sleeving of Horizon Nuclear Power transfer via the parallel 33kV network.
• Enhanced power flow through an existing circuit to defer reinforcement which may be necessary for some connection requests.
• More precise control of the flow of power in the distribution circuit for improved efficiency to avoid naturally occurring AC overloads. This prevents the possibility of overload of the circuit, helping to reduce the number of faults.
• Control of voltage at either end of the distribution circuit to enhance the flow of electricity to customers.
• Control of reactive power flow at both ends of the distribution circuit.
• To lower losses and save wasted energy in the wider distribution network due to the improved voltage control.
• Rapid support to the system voltage during faults to enhance the electricity quality of supply to our customers.
• Fault level decoupling between distribution systems.
• Enables faster access to the network for renewable connections. This helps customers who wish to connect low carbon technologies such as wind.

Project Partners

Reports & Documents

Click the image to view the Fact Card

• Operation and control of mvdc Demonstration Project in the UK
• Verification Report v1.1 PUBLIC
• Installation of the MVDC Circuit v1.0
• Developments in the Angle DC Project
• Angle DC Benefits Report - October 2022
• Angle DC Close Down Report
• Angle DC Circuit Condition Data Report v1.0
• Angle DC Progress Report June 2020 v1.0
• Angle DC Progress Report June 2019 v1.0
• Angle DC Progress Report June 2018 v1.0
• Angle DC Progress Report June 2017 v1.0
• Angle DC Progress Report June 2016 v1.0
• Angle DC Progress Report December 2017 v1.0
• Angle DC Progress Report December 2016
• Medium Voltage DC Technical Brochure, CIGRE
• Project Fact Card Print Version
• MVDC Link System Technical Specification
• HCCM System Technical Specification
• Brochure – Year 1 Project Summary
• HCCM Systems v1.01