1 / 12

Overhead Distribution Systems

Overhead Distribution Systems. Improving Distribution Reliability with Reclosers. The Example Distribution Circuit Typical of suburban/rural circuits 10 miles of 3-Phase 13.8 kV Main Feeder

chipo
Télécharger la présentation

Overhead Distribution Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Overhead Distribution Systems

  2. Improving Distribution Reliability with Reclosers The Example Distribution Circuit • Typical of suburban/rural circuits • 10 miles of 3-Phase 13.8 kV Main Feeder • 8 single-phase laterals, evenly distributed on the main feeder. Each lateral 3 miles long, and connected to the main feeder through a fuse • A total of 1800 customers (8 x 225 customers/lateral) Distribution Substation 10 miles 3 miles 115 kV 13.8 kV

  3. Case 1 10 miles Substation SAIFI: 1.6 int/cust/yr SAIDI: 3.3 hrs/yr MAIFI: 8.7 mom/yr Recloser Case 2 SAIFI: 1.2 int/cust/yr SAIDI: 2.6 hrs/yr MAIFI: 6.5 mom/yr Case 2 - with Single-Pole Reclosing Substation Substation 5 miles 5 miles 5 miles 5 miles Single phase SAIFI: 1.1 int/cust/yr SAIDI: 2.3 hrs/yr MAIFI: 5.4 mom/yr R R R R R Recloser Recloser Basic Radial System

  4. R R Loop Configuration with Manual Switch Case 3 Substation 1 5 miles 5 miles SAIFI: 1.2 int/cust/yr SAIDI: 2.3 hrs/yr MAIFI: 6.5 mom/yr Manual Tie Switch Substation 2 • Assumptions • Circuit breakers have reclosing capability • Manual Tie Switch requires 1 hour to switch • Reclosers require 1 minute to switch

  5. R R Loop Configuration with Manual Switch Case 3 - With Single-Pole Reclosing Substation 1 5 miles 5 miles SAIFI: 1.1 int/cust/yr SAIDI: 2.0 hrs/yr MAIFI: 5.4 mom/yr Manual Tie Switch Substation 2 • Assumptions • Circuit breakers have reclosing capability • Manual Tie Switch requires 1 hour to switch • Reclosers require 1 minute to switch and have single-pole capability

  6. R R R Automatic Loop Restoration - 3 Reclosers Case 4 5 miles 5 miles Substation 1 SAIFI: 1.0 int/cust/yr SAIDI: 2.1 hrs/yr MAIFI: 6.8 mom/yr N.C. Recloser N.O. Recloser Substation 2 N.C. Recloser N.C. - Normally-Closed N.O. - Normally-Open • Assumptions • Circuit breakers have reclosing capability • Reclosers require 1 minute to switch

  7. R R R Automatic Loop Restoration - 3 Reclosers Case 4 - With Single-Pole Reclosing 5 miles 5 miles Substation 1 SAIFI: 0.8 int/cust/yr SAIDI: 1.8 hrs/yr MAIFI: 3.1 mom/yr N.C. Recloser N.O. Recloser Substation 2 N.C. Recloser N.C. - Normally-Closed N.O. - Normally-Open • Assumptions • Circuit breakers have reclosing capability • Reclosers require 1 minute to switch

  8. R R R R R Automatic Loop Restoration - 5 Reclosers Case 5 3.3 miles 3.3 miles 3.3 miles Substation 1 N.C. Recloser N.C. Recloser N.O. Recloser Substation 2 N.C. Recloser N.C. Recloser N.C. - Normally-Closed N.O. - Normally-Open SAIFI: 0.8 int/cust/yr SAIDI: 1.7 hrs/yr MAIFI: 6.5 mom/yr • Assumptions • Circuit breakers have reclosing capability • Reclosers require 1 minute to switch

  9. R R R R R Automatic Loop Restoration - 5 Reclosers Case 5 - With Single-Pole Reclosing 3.3 miles 3.3 miles 3.3 miles Substation 1 N.C. Recloser N.C. Recloser N.O. Recloser Substation 2 N.C. Recloser N.C. Recloser N.C. - Normally-Closed N.O. - Normally-Open SAIFI: 0.6 int/cust/yr SAIDI: 1.4 hrs/yr MAIFI: 2.7 mom/yr • Assumptions • Circuit breakers have reclosing capability • Reclosers require 1 minute to switch

  10. Benefits of Single-Pole Reclosing

  11. Case 1 - Substation reclosing 3 phase only Case 2 - Line Recloser Case 3 - Loop with Manual Switch Case 4 - 3-Recloser Automatic Loop Restoration Case 5 - 5-Recloser Automatic Loop Restoration R R R R R R R R R R R R R Summary of Reclosing Benefits with Single Phase Hrs/Yr%* Hrs/Yr%* 3.3 --- 3.3 --- Single phase 2.6 21% 2.3 30% 2.3 30% 2.0 39% 2.1 36% 1.8 45% 1.7 48% 1.4 58% *% Improvement as compared to Case 1

  12. Predictive Reliability Analysis ABB Consulting’s Performance AdvantageTM Software Useful for: • Looking at system configuration and design • Placement of protective devices • Impacts of changes in failure rates and restoration times • Analyzing system reliability from a graphical perspectiveand determining the most cost-effective solutions

More Related