Electrical Power System Studies

power systemPower system studies vary significantly on each design process depending on the purpose of the project. It would be better to have a complete study on your project rather than having missed one or two when audited. Several power system studies may be combined into single report if having a single stand alone document is not essential. The most commonly used studies are:

  • Cable Ampacity
    Calculates the ampacity or operating temperature of cables.
  • Voltage Drop
    Calculates the system voltage levels and the impact of a motor starting.
  • Protective Device Coordination
    Plots the time-current curve at specified values for each protective device applied on the power system. Prints a one-line diagram of the associated portion of the system on the coordination curve for the plotted devices.
  • Motor Starting Torque / Acceleration Time
    Using motor and load inertia and torque values, calculates the motor voltage and torque values during the accelerating
    period, and determines the overall starting time of a successful motor start.
  • Earthing and Lightnining protection Study
    Determines step and touch potentials and to identify hazard locations and provide design solutions.
  • Transient Stability
    Calculates the response of dynamic loads to various system disturbances and to determine any unstable operating conditions requiring load shedding or other corrective measures.
  • Harmonic Analysis
    Determine harmonic producing loads on a system and evaluate possible migitations, i.e. harmonic filters.
  • Reliability / Availability
    Determine failure rates and outage duration times for electrical equipment using statistical data to evaluate if redundant systems are necessary.
  • Fault Analysis
    Calculates fault duties at every system bus to identify and select devices short-circuit capability.
  • Load Flow
    Calculates the system steady-state conditions for both dynamic and static loads, and investigates various operating modes.
  • Lighting Design
    Determines th e correct illumination levels for each task or area.
  • Generator Sizing
    Using data for equipment availability to determine the size of generator for prime or standby power requirement.

There might be some other studies that I have missed but I am confident that I have listed most of it.

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