Journal of Electrical and Computer Engineering / 2019 / Article / Tab 1

Research Article

A Distributed AGC Method considering Two-Channel Random Delays and Their Difference between Interconnected Power Systems

Table 1

Notations of variables.

VariablesNotationsUnits

TgiTime constant of the governor for area is
TtiTime constant of the generator for area is
KriReheat coefficient of the steam turbine for area ip.u.
TriReheat time constant for area is
RiSpeed regulation parameter for area iHz/p.u.
BiFrequency bias factor for area ip.u./Hz
MiRotary inertia of assembling unit for area ip.u.s2
DiDamping coefficient of load for area ip.u./Hz
ΔPtiChange in turbine output for area ip.u.
ΔPriChange in thermal power output of reheat steam turbine generator sets for area ip.u.
ΔXgiChange in valve position of the governor for area ip.u.
ΔPciControl variable of controller for area ip.u.
ΔPLiLoad changes for area ip.u.
ΔfiFrequency deviation for area iHz
ΔPtijTie-line active power deviationp.u.
TijPower system synchronizing coefficients
ACEiArea control error for area ip.u.
τiController-to-actuator (C-A) delays
τijSensor-to-controller (S-C) delays among different areass
τcaDelay from controller to actuators
τscDelay from sensor to controllers

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