In August, 2011, the latest generation of Pulse Electro-Thermal De-Icing (PETD) was certified on the Boeing 787 Dreamliner for in-flight deicing,. Ten years of intensive research and successful development for several industries, led by Dr. Victor Petrenko at Dartmouth College, has produced a highly refined set of propriety software tools and accumulated knowledge and experience which provide us with a high degree of confidence in the application of PETD technology for wind blade deicing.
Ice Protection for Smart Grids (之VRC用于智能电网)
Variable Resistance Cable (VRC)
The cost of protecting power lines from ice buildup and ice storms with VRC technology is relatively small. VRC protection adds less than 10 percent to system cost.
VRC Ice Protection insures against the following risks and associated costs:
Equipment damage from ice storms
Economic cost of service interruption to customers
Public safety
Advantages of VRC Deicing over other technology
VRC技术论文 Technical Paper)\(US Patent, Chinese Patent专利)
VRC技术论文 Technical Paper)\(US Patent, Chinese Patent专利)
Inexpensive switching electronics
VRC uses existing available line power
No additional source power required
No service interruption to customer
Ability to deice a line section-by-section
Fast. Approx 5 minutes per 10km
Works equally well on DC and AC lines
Ability to monitoring of icing conditions (ice detection)
Low energy. Uses less than 5% of transmission supply.
High stability without causing line imbalance.
Anti-icing mode for both transmission and distribution lines
Excellent performance in the harshest weather conditions
All Other Ice Management Solutions are Inferior
Short Circuit De-icing (SCD)
(80-year old technology invented in Russia)
Advantage:Well-tested, fully-developed.
Approximately 30 times more expensive than VRC
Interrupts power to customers
Expensive; requires step-down transformers and semiconductor current rectifiers
Cannot perform "anti-icing”
Not suitable for deicing short sections
Damages cables through overheating
Reinforced Oversized Towers and Conductors
Expensive; requires tower replacement. Not 100% reliable.
Mechanic/Manual Deicing
(Conductors are removed and deiced by hand)
Slow, dangerous, expensive
Single Conductor Heating
(Tested. Never deployed at Couture, Hydro Quebec)
Inefficient. Heats only one conductor inside a bundle at a time.
Takes 6 times longer than VRC
Does not work for composite conductors
Selective Line Overloading
Inefficient, very slow, excessive energy cost
High Frequency PL De-Icing (Petrenko)
Costs much more than VRC
Generates high-frequency electromagnetic emission
Additional VRC Details Chinese Mandarin / English
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