206 DC Systems Analysis & Arc Flash Training

 
 
     
 

Course Description:
This course has been redeveloped to include additional materials including photovoltaic systems and new DC Arc Flash methods based on Dan Doan's IEEE paper and NFPA 70E 2018.  This course is geared towards electrical power engineers responsible for the design and analysis of DC systems as well as managers responsible for reviewing and approving studies.  Join us and learn from the expert that developed the DC Arc Flash equations that is used in the SKM software!  Feel free to bring your own questions!

Discussions include an overview on commonly used DC equipment and the application of the Power*Tools program to analyze example DC electrical distribution systems. Battery sizing, load-flow, short-circuit, protection, and DC arc flash studies will be reviewed and then performed using the software. 

Objectives:

  • Review of DC equipment (Batteries, PV, Rectifiers, Inverters, and Loads)
  • DC Short Circuit calculations
  • DC Protection overview
  • Review of DC Arc Flash methods (Method to use based on application & limitations)
  • Provide practical DC system examples from typical industrial and commercial power systems with explanations of why the study results are presented.
  • Discuss issues, examine study results and potential problem areas.
  • Discuss considerations when selecting equipment, along with explaining equipment datasheets.
  • Provide relevant information needed to successfully complete a DC Systems study.

 
 

Typical Stationary Battery Supplied Power System Example

  • Review of distribution system analysis topics including battery sizing, battery charger sizing, time dependent load flow, and short-circuit analysis.
  • Discussion of component characteristics and sources of data
  • Discussion of compliance with various standards
  • Discussion of considerations when selecting battery type

Typical Generator and Rectifier Supplied Power System Example

  • Discussion of equipment characteristics and sources of data
  • Review of distribution system analysis topics including load flow and short-circuit analysis
  • Examination and interpretation of PTW study results

Generator and Rectifier Supplied DC Distribution System

  • Examples of equipment data
  • Options for load flow and short circuit studies
  • Considerations applicable to large DC motors and generators
  • Interpretation of PTW equipment evaluation results

Analysis of Example Battery Supplied Distribution System

  • Examples of equipment data
  • Alternatives in battery sizing and load flow analysis
  • ANSI and IEC methods for short circuit analysis
  • Interpretation of PTW equipment results

Typical Lead-Acid and Nickel-Cadmium Battery Characteristic Example

  • Review and interpretation of manufacturer’s battery characteristic data
  • Entry of characteristic data into PTW Library

DC Arc Flash Example

  • Arc Flash calculations using NFPA 70E 2018 Annex D.5
  • Arc Flash calculations using Stokes - Oppenlander Method
  • Interpretation of PTW study results

Photovoltaic systems

  • Modeling of PV Arrays
  • Review of PV library (P-V and I-V curves)
  • Implementation of PV systems and interpretation of PTW study results

Other Topics

  • Discussion of methods and procedures on completing a typical study
  • Examination and interpretation of PTW study results and potential problem areas in a DC power system
 
   

Material from the Course 202 - Power Systems Application Training - Arc Flash Evaluation will be discussed.  Topics include:

Assessment of Existing Arc Flash Standards and Codes

  • General Steps on Performing Arc Flash Analysis
  • Occupational Health and Safety Administration (OSHA)
  • OSHA Apparel Standard 1910.269(l)(6)
  • Institute of Electrical and Electronics Engineers (IEEE)
  • What’s New in IEEE 1584-2018
  • Calculation Approach
  • Electrode Configuration
  • Enclosure Dimensions
  • Arcing Fault Variation
  • Bolted Fault Current and Gap Limits
  • Less Than 240V Application
  • Use of Lee Equation for Out-of-Range Model
  • Lee’s Method
  • Doughty Neal Paper
  • NESC Method
  • EPRI Report
  • OSHA Comparison Table
  • DC Systems Arc Flash
  • Maximum Power Method
  • Stokes-Oppenlander Method

Exercise - Performing the Arc Flash Study Using IEEE 1584-2018

  • Becoming Familiar With the Project
  • Determining The Appropriate Scenarios
  • Determining The Appropriate Options for Each Scenario
  • Run The Comprehensive Short Circuit Study
  • Run The Equipment Evaluation Study
  • Run The Arc Flash Study
  • Interpreting Results and Identifying Overdutied Protective Devices
  • Understanding Overdutied Flags *N21(a) and *N21(b)
  • Understanding the Mis-coordinated Flag *N5
  • Understanding Induction Motor Contribution
  • Identifying High AFIE Locations
  • Mitigation Techniques
  • Methods to Reduce the Fault Clearing Time:
  • Methods to Reduce the Working Distance:
  • Methods to Reduce the Short Circuit Current:
  • Methods to Reduce the Energy Exposure:
  • Creation of Mitigation TCC’s
  • Creation of Scenarios
  • Mitigation Process
  • Mitigation of Locations TR-1-S and MDP-1 (LS)
  • Mitigation of Locations TR-4-SEC and MCC-2 (LS)

Data Collection Process

  • Equipment to Include in the Survey
  • Tips to Conduct the Data Collection Process
  • Qualified Data Collection Technicians
  • Suggested Survey Methodology
  • Best Practices
  • Survey Challenges
  • Tips to Ensure Accuracy of Database
  • Tips to Format the One-Lines


Prerequisites:

  • Basic computer skills
  • SKM Power*Tools Standard 3-Day and Advanced 2-Day Training OR working knowledge of SKM PTW Software
  • Students are urged to review:
    • IEEE Brown Book Std 399 - 1997, chapter 16
    • IEEE 485 - 2010, “IEEE Recommended Practice for Sizing Lead-Acid Batteries for Stationary Applications”
    • IEEE 946 - 2004, “IEEE Recommended Practice for the Design of Safety-Related DC Auxiliary Power Systems for Nuclear Power Generating Stations”
    • IEEE 1115 - 2000, “IEEE Recommended Practice for Sizing Nickel-Cadmium Batteries for Stationary Applications”
    • IEEE 1184 - 2006, “IEEE Guide for Batteries for Uninterruptible Power Supply Systems”
    • IEEE 1375 - 1998, “Guide for the Protection of Stationary Battery Systems”
    • IEC Std 61660 Part 1, “Short Circuit Currents in D.C. Auxiliary Installations In Power Plants and Substations, Part 1: Calculation of Short-Circuit Currents”
    • IEEE 1584 2002/2004a, "Guide for Performing Arc Flash Hazard Calculations"
    • NFPA 70E, "Standard for Electrical Safety in the Workplace"
 
 
Course 206 DC Systems Analysis & Arc Flash Training
Course Hours Web training: 7:00am-3:30pm Pacific Time.
Course Fees Click Enroll button below to see latest fees. 
Registration Fees Include 1 Training Manual.
SKM will provide the latest version of the PTW software prior to the class for installation. License key will be provided the week before the course.
Course Location
 
     
     
   
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