28-11-2012, 05:27 PM
A Modern Electrical Transmission and Distribution System
modern trnsmisson.ppt (Size: 851 KB / Downloads: 102)
Today’s Challenges
T&D System must meet challenges it was not designed for:
A digital society which demands higher reliability and power quality
Increasing number of power marketing transactions
Increased use of renewable and distributed generation
Cyber-security and terrorist attack
Pressure on capital and O&M spending and difficulty in siting new transmission lines
U.S. R&D expenditures have trended downward
Aging workforce
Addressing the Problem
Recent upward trend in investment will need to continue – just to maintain current capabilities and reliabilities
Older and outdated equipment will need to be replaced and new transmission lines build to handle the increasing load and power flows
Employ new technologies to make grid more resilient
New technology can do much to meet the challenges, but not in isolation – policy and regulatory changes may be needed for the transmission system
Modern T&D System Performance Standards
Provide reliability and power quality for the 21st century
Provide emergency response
Fast restoration after a system failure
Effective routine operations
Asset optimization
Effective system planning capabilities
T&D System Characteristics Required to Achieve Performance Standards
Accommodates all generation and storage options
Enables wholesale power markets
Self-healing
Motivates and includes the customer
Provides high power quality where needed
Secure
Optimizes assets and operates efficiently
Deploying Modern T&D Systems
Complexity suggests development of metrics to measure performance and societal benefits
A national strategy may be required for transmission