Power System Design

What this covers

• Network topology — radial, ring and dual-source arrangements, and the availability each actually delivers.
• Substation configuration — single busbar, sectionalised, double busbar and main-and-transfer, assessed against operational and maintenance requirements.
• Voltage selection and transformation — voltage levels, transformer sizing, impedance and tap range.
• Equipment rating — switchgear, cable and busbar duties verified against calculated fault levels and continuous and emergency loading.
• Earthing arrangement — solid, resistance or resonant earthing, and the fault current and protection consequences of each.
• System earthing design — grid layout, step and touch voltage, and ground potential rise.
• Protection philosophy interface — ensuring the design can actually be protected selectively before it is built.

What you receive

• Design basis and single-line diagram
• Equipment rating and sizing calculations
• Load flow, short circuit and earthing study results supporting each decision
• Design report with the options considered and the reasoning for the selection
• Specification input for procurement

Standards and references

Design references IEC 61936-1 for AC installations above 1 kV, IEC 60909 or ANSI/IEEE C37.010 for fault levels, IEEE 80 for earthing and IEC 60038 for standard voltages, together with the applicable grid code.