Power System Studies

Power System Studies

Is starting this new motor going to cause a brown out?  Are our personnel safe when they do maintenance on our live MCC/switchgear?  Do we have enough capacity to add this new load to our system?  Ready has the answers to your power system questions.

When Ready’s clients have questions and concerns about their electrical systems, our personnel can:

  • Acquire accurate site information
  • Prepare a computer model of the electrical system
  • Investigate central concerns with various Power System Studies

Typically, power system studies are performed for new systems during the design phase, after modifications to the feeding power grid, and before modifications to existing electrical systems.   Ready then takes the detailed power system study results and puts them into context for our clients, along with recommendations of tailored solutions to optimize the reliability, efficiency and safety of their system.

Ready's consultants are proficient in the latest power system tools, including ETAP Electrical Engineering software and SKM Power Tools.  The versatile suite of power system studies that Ready offers are ideal for streamlining existing operations and ensuring facility upgrades of all scales.  Examples of commonly-requested power system studies are listed in the table below:

Load flowMany factors including, but not limited to the following, can be determined with a load flow study: cable/feeder capacity, transformer specifications (impedance, tap settings), generator MVAR demand, optimized operation conditions (bus voltages, equipment insulation ratings not being exceeded).
Short-circuitDetermine the magnitude of currents flowing through an electrical system during a fault condition. Verify operation of protective devices, examine thermal stress of equipment, select equipment ratings, and determine settings for relay coordination.
Protective device coordinationWith known short-circuit levels, determine optimal ratings and settings of the electrical system's protective devices to ensure coordination in the event of electrical failure or fault.
Arc flash hazard analysisUse information gathered from short circuit and coordination studies to evaluate the incident energy generated from electrical distribution equipment and the resulting boundary distances.
Motor startingEnsure that large motors will start and that voltage drop will not disturb other system loads, determine adequate sizing for feeders, and calculate the maximum motor size that can be started across a given line.
Harmonic mitigation and complianceAscertain the natural resonant frequencies found in an electrical system of interest, simulate the harmonics produced by non-linear equipment, and mitigate the harmonics by implementing optimized filters.
Ground grid systemMeasure soil resistivity and compute the ground potential rise during a fault. Specify options to ensure good grounding design that meets the applicable codes and standards.
Transient disturbances analysisExplore the capability of an electrical system to respond to transient disturbances from rapid load changes. Offer options to improve system stability such as SVCs and load-banks.

Please contact us to discuss how we might contribute to the success of your project!

Jordie  Holton , P.Eng.
Manager, Electrical Engineering
780.960.6663 x124
Maysam  Radvar , P.Eng., M.Eng., PE
Engineering Manager, Electrical
360.413.9800 x305