Skip to main content
ScottishPower |

Select Language:

Main menu


The shift from energy generation in traditional thermal power plants to a new and more flexible energy landscape has created a number of challenges.


End of 2017 – Start of 2021

Project Status


About the Project

About the Project

Issues linked to the progressive closure of synchronous generation plants in thermal power stations include:

  • Reduced inertia

The closure of these large synchronous generating plants is reducing overall inertia within the GB network. Phoenix will demonstrate how inertia can be reintroduced.

  • Limited voltage control

Voltage control is becoming limited as synchronous generating plant is used for this. Phoenix will provide more control over voltage in the network within its capability.

  • Lower Short Circuit Level

Short circuit level is important as it is needed to operate protection correctly. The loss of large generating plant reduces short circuit level, meaning electrical protection may not operate.

By bringing two technologies together to create a Hybrid- Synchronous Condenser, the Phoenix project will provide a more stable system, reduce costs - bringing benefits to customers and aiding the move towards cleaner energy.

Phoenix will provide more control over voltage in the network within its capability.

The roll-out of Synchronised Condensers will help create stability in the grid, reacting when extra power is needed and providing more control over voltage. However, there is a range of technical, commercial and engineering issues that have to be addressed first.

Phoenix is an innovative project which aims to overcome those issues by combining two technologies: Synchronous Condensers and Static Compensators. The result is a Hybrid-Synchronous Condenser.

Check out the video below for more information on Project Phoenix


Project Objectives

The objectives of Phoenix are to demonstrate a sustainable design, deployment and operational control of a Synchronous Compensator with innovative hybrid co-ordinated control system combined with a static compensator referred to in the project as Hybrid-Synchronous Compensator.

The objectives of utilising these devices is expected to demonstrate how the serious system issues that are being encountered on the GB transmission network as a result of the progressive closure of synchronous generation plants can be mitigated

Phoenix will enable future installations and essential network services to be provided for GB System Operators, Transmission Owners and Distribution Network Operator.

Phoenix will consider the wider market and how a market could be structured to deliver the services including inertia and short circuit level.


The Benefits For Customers

In comparison to the conventional synchronous generators currently in place and closing, Phoenix will:

  • Enhance system stability, helping to reduce power cuts.
  • Reduce the electricity network operating costs, effectively financially benefitting customers. The net present value of Phoenix has been estimated at around £42m.
  • Release an additional capacity of 662MW to the electricity network. This will allow additional Distributed Energy Resources - such as photovoltaics and wind turbines - to be connected and flow through the network.

  • Minimise carbon footprint and continue creating a sustainable network for our customers. Phoenix will enable a saving of just over 62k tonnes of carbon - equivalent to the electricity use of over 6,000 homes.
  • Enable further development of the commercial mechanisms available to incentivise the roll out of Phoenix’s technology. This will develop from system case studies and cost benefit analysis models.
  • Aid the transition to a future GB transmission network that can benefit from clean energy resources without compromising the security and quality of supply to the customers.
  • Carry out analysis on the impact of installing Synchronous Condensers at various locations and their impact on the performance of the UK electricity system. This is through collaboration with the UK System Operator.


Project Partners

Project Partners

NGET, ABB, University of Strathclyde, Technical University of Denmark.

Reports & Documents

Back to top