Introduction: A balance must be achieved between reducing the HV network voltage sufficiently to create headroom for DG, and not reducing it so much that low voltage problems are created. From initial studies it is believed that Load Drop Compensation (LDC) may have the potential to achieve this balance by increasing the voltage set point as demand increases, and lowering the set point as demand reduces. In some instances, a permanent reduction in the Automatic Voltage Control (AVC) set point may be sufficient, particularly for geographically compact cable networks where excessive voltage drop may not be a problem. It is proposed to study a number of primary substations following principles defined in Electricity North West’s Code of Practice 370 Voltage Control for 132kV, 33kV and 11/6.6kV Systems.

Objectives: This IFI project is to review and adjust the voltage control at a number of primary substations to provide voltage headroom for generation.