The probability-assessment analyses on the characteristic value of voltage dip by using Monte Carlo
stochastic modeling method to stimulate the randomness of the short circuit fault are introduced. Using Matlab
and Power Systems CAD (PSCAD), we design control interface which combines the electromagnetic transient
simulation with the Monte Carlo method. Specifically, the designing of interface which is meant to employ the
method of Matlab programming to control the electromagnetic transients including direct current (EMTDC)
simulation is introduced. Furthermore, the influences of the protection devices on the voltage dip to ensure
the authenticity and the referential reliability are simulated. A system with the inverse-time protection devices
equipped on each line which can coordinate together is designed to cut off the short-circuit fault. The voltage
dip of the designed system is assessed by the pre- and post-system average root mean square (RMS) variation
frequency index, and the voltage dip index is compared with the Information Technology Industry Council (ITIC)
curves. The simulation results demonstrate that the inverse-time relay protection equipments are well-coordinated,
and the severity and the range of the voltage dip are influenced by the cooperation of the equipped inverse-time
protection devices.
GAO Xin-ke1,2* (高新科), LIU Ya-peng3 (刘玡朋)
. Influence of the Inverse-Time Protection Relays on the Voltage Dip Index[J]. Journal of Shanghai Jiaotong University(Science), 2014
, 19(3)
: 354
-360
.
DOI: 10.1007/s12204-014-1509-3
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