ICS: Insulation Co-ordination Study
Sadovic Consultant has been performing insulation co-ordination studies in the Middle East region for more than twenty years. Since 2008, Sadovic Consultant is an approved subcontractor for insulation co-ordination studies by Dubai Electricity & Water Authority (DEWA), United Arab Emirates. A total of more than one hundred insulation co-ordination studies have been performed in the United Arab Emirates (for DEWA, TAQA-T, SEWA, EtihadWe), Oman (for OETC), Kuwait (for MEW), Iraq (for MOE), Saudi Arabia (for NEOM), Bahrain (for EWA).
Following standards are followed in our studies:
- IEC standard 60071 dedicated to insulation co-ordination procedure.
- IEC standard 60099 dedicated to surge arrester selection and application.
- Various CIGRE and IEEE standards related to lightning stroke distribution, leader propagation model, etc.
Following simulation software is used in our studies:
- EMTP: The Electromagnetic Transients Program is used for the simulation of worst case scenario regarding lightning and switching overvoltages. Typical study includes the backflashover/shielding failure flashover simulation, and the line/cable re-energization with trapped charge. Same software is used for the Transient Recovery Voltage (TRV) study for circuit breakers, dimensioning of RC surge suppressor for the transformer tertiary etc.
- PSCAD/EMTDC: The Power Systems Computer Aided Design/Electromagnetic Transients including DC is used the same as EMTP here above.
- Sigma SLP: Software for Lightning Performance is used for the simulation of parameters that are not available with EMTP and PSCAD/EMTDC. This includes the maximum amplitude of lightning stroke current that can bypass shield wire and terminate to the phase conductor directly (shielding failure event).
- I3CM LLS: Simulations with EMTP and PSCAD/EMTDC can be performed one step closer to the real-world experience by using the lightning data available in the I3CM LLS software such as custom stroke distribution nearby studied overhead line. That data originates from ground based lightning location systems.
