The pre-requisite work of raising the temperature of the circuit to run at 70 degrees will be required before installing Power Guardian and PowerLine Guardian devices which is outside the scope of this project. This will be done as part of business as usual activity and will increase the capacity of only the PJ route. Unfortunately the impedance variation will simply attract the same overload condition on the PJ in the coming years, thus the need to trial innovative solutions to balance power flows in 132kV overhead line networks.

The scope of this project is as follows:

• Detailed curtailment studies to confirm the actual reactance required on PJ route of Bramford GSP to Lawford Grid substations;
• Add approximately 1.8 ohms (to be confirmed following detailed studies) onto PJ route of Bramford to Lawford 132kV Grid substation. This will include:

o Install PowerLine Guardian units on PJ route;o Install Power Guardian units onto PJ route at Lawford Grid substation. This includes carrying out civils and foundation works at Lawford Grid substation to support the equipment;

• Commissioning of the modular power flow control solution and integration of the units within UK Power Networks’ control system;
• Testing of the control modes for the SmartWire solution to balance impedance on the circuit;
• Unlock additional capacity on PJ route by adding SmartWire solutions in combination; and
• Publish a paper on the work undertaken to share the knowledge with GB DNOs (via ENA or other forums).

Benefits

The project will be deemed successful if:

• SmartWire technology PowerLine Guardian and Power Guardian trialled on the PJ route;
• SmartWire solutions demonstrate ability to control power flows on the circuits between Bramford GSP to Lawford Grid as required; and
• Documentation on installation and operation of SmartWire’s Modular Power Flow Control solutions is completed and shared with other DNOs within Great Britain.