Page 11 - Modern Control of DC-Based Power Systems

x List of Figures

Figure 3.2 Transition from state xðt 0 Þ to state x t 1 ðÞ 90
Figure 3.3 State feedback to place the poles 92
Figure 3.4 Observer scheme 94
Figure 3.5 V I characteristic of an ideal voltage source (left) and real 97
voltage source droop curve (right)
Figure 3.6 Two voltage sources connected in parallel 98
Figure 3.7 Two parallel voltage sources with different operating points 98
at different droop steepness characteristics
Figure 3.8 Two parallel voltage sources with different operating points 99
at different droop steepness characteristics
Figure 3.9 Block diagram of the droop control of converter 100
Figure 3.10 A simple circuit controlled by a droop control approach 101
Figure 3.11 Pole positions as function of the value of the droop 102
coefficients
Figure 4.1 Control classification 104
Figure 4.2 MVDC shipboard—schematic radial topology 106
Figure 4.3 Circuit representation of Integrated Shipboard Power System 106
Figure 4.4 Simplified model including a linear and a nonlinear load 108
Figure 5.1 Scheme of the linearizing state feedback controller 115
Figure 5.2 Control synthesis model of centralized system for LSF 115
Figure 5.3 Voltage LSF cascaded Ideal CPL Step 10.3 - 121
17.8 MW
Figure 5.4 Current LSF cascaded Ideal CPL Step 10.3 - 122
17.8 MW
Figure 5.5 ISPS V bus LSF for ideal CPL Step 30.9 - 53.4 MW 122
Figure 5.6 ISPS I L1=L2=L3 LSF for ideal CPL Step 30.9 - 123
53.4 MW Synergetic Control
Figure 5.7 Overview of synergetic control scheme 127
Figure 5.8 Control synthesis model of centralized system for synergetic 127
control containing disturbance M(t)
Figure 5.9 Voltage synergetic cascaded Ideal CPL Step 10.3 - 132
17.8 MW
Figure 5.10 Current synergetic cascaded Ideal CPL Step 10.3 - 133
17.8 MW
Figure 5.11 ISPS V bus synergetic for ideal CPL Step 30.9 - 133
53.4 MW
Figure 5.12 ISPS I L1=L2=L3 synergetic for ideal CPL Step 30.9 - 133
53.4 MW
Figure 5.13 Graphical illustration of the mapping between the target 136
system and the system to be controlled
Figure 5.14 Dynamic of the states of the system 138
Figure 5.15 Phase plane of the generic second-order system 139
Figure 5.16 Structure of the proposed I&I control 141
Figure 5.17 Centralized I&I Control for MVDC System 142
Figure 5.18 Voltage I&I cascaded Ideal CPL Step 10.3 - 17.8 MW 142