|
<< Click to Display Table of Contents >> Navigation: Appendix > Vision: info calculations |
•Newton Rapson method
•calculation of:
onetwork load and voltage management
otransformer tap setting
ostarting current and voltage dip on motor starting
on-1 analysis
oresidual capacity
ovoltage dips
onetwork losses.
•superposition method in accordance with IEC 60909
•passive network model
•symmetrical and asymmetrical short-circuit calculations
•calculation of:
osubtransient short-circuit current and short-circuit power
opeak short-circuit current
oadmissible short-circuit duration
oR/X ratio of the network at the fault location
oall network currents per phase.
•active network model
•symmetrical and asymmetrical fault analysis
•fault impedances
•opening switches
•cross-country fault analysis
•calculation of:
osubtransient short-circuit current
oall currents and voltages (per phase or per symmetrical component, both absolute and complex).
•failure modes:
osingle mode failure
osingle mode failure plus protection failure
ocommon cause failure
omaintenance plus single mode failure
•restoration process:
osignal a failure
oactivate recovery and repair crew
olocate faulted component
oisolate faulted component
orecover energy service
•calculation of:
oF, Outage Frequency
oD, Outage Duration
oP, Outage Duration per year
oP, Outage Probability
oENS, Energy Not Served
oP*BC: large customers outage duration
oP*SC: small customers outage duration
•modelling:
ofuse
ocircuit breaker
ocurrent protection
oearth fault protection
ovoltage protection
odistance protection
odifferential protection
•calculation of:
ocoordination
osimulation
oselectivity
•calculation of:
oharmonic load flow
ofrequency spectrum
Network analysis
•analysis of:
•powerful programming language
•sensitivity analyses
•repetitive operations and calculations
Back to: Vision Info