Current Trends in the Power Quality Market. February 28, 2006. EPRI Power Quality Study in U.S. 93% of all Voltage sags and outages are less than 10 seconds in duration. Continuous Power System(CPS). Diesel Genset. For continuous power after 10 seconds. Critical Load. UPS Electronics.
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February 28, 2006
93% of all Voltage sags and outages are less than 10 seconds in duration
For continuous power
after 10 seconds
for immediate power
Industry Avg cost of downtime ($/hr)Brokerage $6,450,000 Credit Card $2,600,000 Pay Per View $150,000 Home Shopping $113,000 Catalog Sales $90,000 Airline Reservations $90,000 Tele-Ticket $69,000 Package Shipping $28,000 ATM Fees $14,400Source: 7x24 Exchange
Improved High Rate Grid Design
12 to 18 year life (depending on number of outages; environment)
Fails in “shorted” position
About 2x initial cost of 10Year VRLABattery Technologies:
BatteriesTypical Double Conversion UPS Oneline
6 PULSE CONV.
12 PULSE CONV.
PWM CONV.:PULSE WIDTH
AC Input Current
AC Input Voltage
Sine Wave Form (pf=1.0)
12-PULSE THYRISTOR RECTIFIER
PWM IGBT CONVERTER
INPUT CURRENT HARMONIC CONTENT
UNITY (1.0) with PWM converter
0.8 – 0.85 with Thyristor rectifier
GTO:GATE TURN OFF THYRISTOR
BPT:BIPOLAR POWER TRANSISTOR
G T O
It’s dependant on your susceptibility.
Given the quality of supply do I have to worry about problems with my equipment or systems?
What is my susceptibility to power problems?
What is my economic exposure to such problems?
It’s the complete electrical environment, not just the quality of supply.
Does my power system have the capacity for my present needs?
How about future growth?