hybrid emergency
TRANSCRIPT
CONTENTS
INTRODUCTION POWER SYSTEMS CHARACTERISATIONS VOLTAGE COLLAPSE SYSTEM MODELLING AND DECOMPOSITION FAULT IN THE SYSTEM OPTIMAL VOLTAGE CONTROL MODEL PREDICTIVE CONTROL CONCLUSION REFERENCES
POWER SYSTEMS CHARACTERISATIONS
NON LINEARITY OF SYSTEM
HYBRID SYSTEM DYNAMICS
LARGE SCALE DIMENSIONS
MODEL UNCERTAINITIES
BASIC METHODS TO AVOID COLLAPSE
AUTOMATIC VOLTAGE REGULATOR
COMPENSATORS
CIRCUIT BREAKERS
PROTECTIVE RELAYS
LOAD SHEDDING
DECOMPOSITION OF THE GIVEN MODEL
DESCRIPTION DECOMPOSED MODEL
CONTINOUS DYNAMICAL SYSTEM
DISCRETE EVENT SYSTEM
DECOMPOSED MODEL PARAMETERS
x :=[xLp, xLq]T
ub := [sC, sL]T
and y := [V2m, V3m, V4m]T
THREE BUS VOLTAGES is taken generally as Vim
where i ∈ {2,3,4}
FAULT OCCURRENCE AND REPRESENTATION
At t=100s, fault occurs on line 3 i.e. fault.
Over excitation limiter is activated of Generator at t=224s
OPTIMAL VOLTAGE CONTROL
OBJECTIVES
CONTROL MOVES NOMINAL MOVES EMERGENCY MOVES
MODEL PREDICTIVE CONTROL
MODEL PREDICTIVE CONTROL
CASCADED CONTROLLER SCHEME ΔnT {0, n∈ step,−nstep},
V4m,ref (t − 1) if ΔnT (t) = 0,
0.8 if ΔnT (t) = −nstep,
1.2 if ΔnT (t) = nstep.
MPC Objective Function
MODEL PREDICTIVE CONTROL
CONTROL EXPERIMENTS
Figure 4 shows the bus voltages V3m and V4m of the original nonlinear model as well as the ones of the MLD model.
MODEL PREDICTIVE CONTROL
The manipulated variable V4m,ref together with its tolerance band is shown in Figure 5
REFERENCES
HYBRID EMERGENCY VOLTAGE CONTROL IN POWER SYSTEMS
Tobias Geyer, Mats Larsson, Manfred Morari
WIKIPEDIA, the free encyclopedia.
ELECTRICAL POWER SYSTEMS C.L. WADHWA NEW AGE INTERNATIONAL PUBLISHERS