Introduction: National Grid’s Future Energy Scenarios show that irrespective the scenario, demand is going to increase by 25% between now and 2038; it is expected that most of the new demand will be connected to low voltage distribution networks. This in turn is likely to cause a larger phase imbalance than currently observed. Domestic load is normally connected to one phase.  Once one phase of a transformer or underground cable reaches its maximum rating then LV network reinforcement needs to be considered.

Objectives: The project will:
·         demonstrate that the PSS can become a solution to reduce unbalance between phases and monitor its impact on the LV feeder or distribution transformer. 
·         demonstrate that the benefits delivered by the PSS of releasing capacity and estimating its longevity are realistic.
·         assess the impact of moving demand from one phase to another. 
·         develop a methodology that will indicate how long the benefits are likely to deliver benefits based on the Future Energy Scenarios demand growth.
·         validate the CBA showing the benefits of this alternative solution.