SC C4 is responsible for methods and tools for analysis related to power systems in the following fields:

Power Quality: Continuity of supply and voltage quality (magnitude, waveform, frequency, symmetry). Analysis covers measurement and simulation methods, identification of quality indices, study of acceptable/achievable limits / performance objectives, monitoring techniques, emission from disturbing installations, immunity of sensitive installations, and mitigation techniques, economic aspects.

Electromagnetic Compatibility (EMC): High frequency disturbances on the electricity supply and all disturbances (HF or LF) reaching equipment other than through the electricity supply. Studies include measurement and simulation methods. However, health effects related to low frequency EMF are excluded.

Insulation co-ordination: Methods and tools for insulation co-ordination in electric power systems and equipment, contributing to optimisation of their cost and reliability.

Lightning: Lightning characteristics and interactions of lightning with electric power systems and equipment, including protection in MV and LV networks against lightning, and their standardisation.

Power System Security Assessment: New analytical techniques for assessment of power system security, design of controls and modelling of existing and new equipment, real time stability evaluation and control.