Port Shore Power Grid, Transformer & Cable Capacity Tool

Ship Universe Port Infrastructure Tool

Port Shore Power Grid, Transformer & Cable Capacity Tool

Size port-side shore-power infrastructure from simultaneous vessel demand, diversity, transformer loading, redundancy, cable ampacity, voltage drop and available utility capacity. Estimate transformer count, installed MVA, berth cable circuits, main feeder circuits, annual energy, grid reinforcement and high-level infrastructure cost.

Currency

Currency selector changes display only. No exchange-rate conversion is performed.

Grid Capacity Coincident ship load, conversion losses, utility capacity and reinforcement requirement

Transformer Sizing Required MVA, unit count, loading limit, design margin and optional N+1 redundancy

Cable Capacity Berth current, parallel circuits, derated ampacity and voltage-drop screening

Shore-Power Demand

Model a group of similar shore-power berths operating from the same port electrical system.

Simultaneous vessel connections

vessels

Maximum shore-power demand per vessel

MW/vessel

Peak coincidence / diversity factor

Design spare margin

Average load while connected

Connected hours per operating day

hours/day

Operating days per year

days/year

Electrical System

Ship connection voltage

kV line-line

Main shore-power bus voltage

kV line-line

Vessel power factor

Grid-to-ship electrical efficiency

Existing grid capacity available to shore power

Transformer Configuration

Transformer unit rating

MVA/unit

Maximum planned transformer loading

Transformer redundancy

Berth Cable Capacity

Cable circuit rated ampacity

A/circuit

Cable derating factor

Average berth cable route length

meters

Cable resistance

mΩ/km

Cable reactance

mΩ/km

Maximum screening voltage drop

Main Feeder

Main feeder circuit ampacity

A/circuit

Main feeder derating factor

Main feeder route length

meters

Infrastructure Economics

Transformer installed cost

$ /MVA

Berth cable installed cost

$ /m/circuit

Main feeder installed cost

$ /m/circuit

Substation / switchgear fixed cost

Grid reinforcement cost

$ /MW added

Electricity cost

$ /MWh

Annual infrastructure O&M

% CAPEX/year

Shore-Power Berths

Model berths with different vessel loads, power factors, voltages, utilization and cable route lengths on one shared port electrical system.

Berth / Group	Connections	MW/Ship	Peak Diversity %	Avg Load %	Hours/Day	Voltage kV	PF	Cable Run m

Shared Electrical System

Main shore-power bus voltage

kV line-line

Grid-to-ship electrical efficiency

Design spare margin

Existing grid capacity available

Operating days per year

days/year

Transformer Configuration

Transformer unit rating

MVA/unit

Maximum planned transformer loading

Transformer redundancy

Cable Electrical Assumptions

Berth cable circuit rated ampacity

A/circuit

Berth cable derating factor

Main feeder circuit ampacity

A/circuit

Main feeder derating factor

Cable resistance

mΩ/km

Cable reactance

mΩ/km

Maximum screening voltage drop

Main feeder route length

meters

Infrastructure Economics

Transformer installed cost

$ /MVA

Berth cable installed cost

$ /m/circuit

Main feeder installed cost

$ /m/circuit

Substation / switchgear fixed cost

Grid reinforcement cost

$ /MW added

Electricity cost

$ /MWh

Annual infrastructure O&M

% CAPEX/year

Port Shore-Power Infrastructure Results

Similar-berth infrastructure sizing

Enter shore-power data

Enter vessel demand, electrical-system, transformer and cable assumptions to estimate port shore-power infrastructure capacity.

Required Grid Supply

N/A

Design ship load including spare margin and entered electrical losses

Transformer Installation

N/A

Transformer count and installed nameplate capacity

Coincident Ship Load

N/A

Design Ship Load

N/A

Required Apparent Power

N/A

Installed Transformer MVA

N/A

Normal Transformer Loading

N/A

Post-Loss Transformer Margin

N/A

Grid Capacity Margin

N/A

Grid Reinforcement

N/A

Berth Cable Circuits

N/A

Main Feeder Circuits

N/A

Main Feeder Current

N/A

Main Feeder Voltage Drop

N/A

Annual Ship Energy

N/A

Annual Grid Energy

N/A

Annual Electricity Cost

N/A

Infrastructure CAPEX

N/A

Annual Infrastructure O&M

N/A

Annual Energy + O&M

N/A

Berth Connection & Cable Results Advanced mode

Berth / Group	Ship MW	Ship Current	Circuits/Ship	Current/Circuit	Cable Loading	Voltage Drop	Cable Length	Status

Grid & Transformer Summary

Cable Capacity Summary

Infrastructure Cost Breakdown

Required Grid Capacity Sensitivity Peak load vs system efficiency

Peak Load \ Efficiency	-2%	Base	+2%

Model approach: coincident ship MW is the sum of connected vessel loads multiplied by entered peak diversity. Design MW adds the entered spare margin. Apparent power is calculated from berth MW and power factor. Transformer count is based on unit MVA × maximum planned loading, with an additional unit when N+1 is selected. Three-phase current uses MW divided by √3 × line voltage × power factor. Parallel cable circuits are rounded up using derated ampacity. Voltage drop uses entered resistance, reactance, circuit current, route length and power factor. Grid MW includes the entered electrical-efficiency loss.

Planning estimate only. Shore-power installations require detailed utility, protection, grounding, harmonic, short-circuit, transformer, switchgear, cable, thermal, fault, selectivity, power-quality and connection studies. Actual cable ampacity depends on conductor material, installation method, grouping, ambient temperature, soil or duct conditions, cooling, insulation system and applicable electrical standards. Voltage-drop results are a simplified balanced three-phase screening calculation. Transformer sizing does not model harmonic derating, inrush, transient loading, tap range, reactive-power compensation or detailed contingency operation. Grid capacity entered here should represent capacity actually available to the shore-power project, not total utility or port nameplate capacity. Cost inputs are user-entered planning assumptions and should be replaced with project-specific supplier, utility and EPC estimates.

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