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main_v2gg2v.m
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main_v2gg2v.m
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tic
clear all; close all;
%% Select the simulation case by uncommenting only one of the sim_case
% Available sim_case options:
% 1. 'NoV2GG2V' : IEEE-3 bus grid without any V2G/G2V connected
% 2. 'V2G_Gajduk' : V2G mode with Gajduk's local frequency control
% 3. 'V2G_FDCC' : V2G mode with RMS fault detection (FD) and
% battery constant current (CC) control
% 4. 'G2V' : G2V mode with constant battery current
% sim_case = 'NoV2GG2V'
sim_case = 'V2G_Gajduk'
% sim_case = 'V2G_FDCC'
% sim_case = 'G2V'
%% Select which bus (active_bus) will have their V2G/G2V system activated
% active_bus = 1
% active_bus = 2
active_bus = 3
% active_bus = [1,2,3]
%% Select which bus (plot_bus) will have their V2G/G2V states plotted
plot_bus = active_bus % default
% plot_bus = 1
% plot_bus = 2
% plot_bus = 3
%% Choose the fault location (fault_loc) x_y-z where:
% x: location of the fault at bus x
% y-z: location of the fault between transmission line bus y-z
all_faults = {'1_1-2','1_1-3','2_1-2','2_2-3','3_1-3','3_2-3'}; % don't comment this
fault_loc = '1_1-2'
% fault_loc = '2_1-2'
%% Pre-tuned Options
switch fault_loc
case '1_1-2'
switch sim_case
case 'NoV2GG2V'
% Fault Clearing Time (FCT) (seconds)
FCT = 0.241 % (stable FCT=CCT)
% FCT = 0.242 % (unstable FCT>CCT, starts to deviate)
case 'V2G_Gajduk'
h_PEV = -2000
if active_bus == 1
FCT = 0.184 % stable
% FCT = 0.185 % unstable
end
if active_bus == 2
FCT = 0.242 % stable
% FCT = 0.243 % unstable
end
if active_bus == 3
FCT = 0.242 % stable
FCT = 0.243 % unstable
end
if active_bus == [1, 2, 3]
FCT = 0.243 % stable
% FCT = 0.244 % unstable
end
case 'V2G_FDCC'
Ibatfault_ref = 200 %100
Vfault_thresh = 455
if active_bus == 1
FCT = 0.238 % stable
% FCT = 0.239 % unstable
end
if active_bus == 2
FCT = 0.250 % stable
% FCT = 0.251 % unstable
end
if active_bus == 3
FCT = 0.250 % stable
% FCT = 0.251 % unstable
end
if active_bus == [1, 2, 3]
FCT = 0.241 % stable
% FCT = 0.242 % unstable
% FCT = 0.243 % unstable
end
case 'G2V'
% Battery current reference (A)
Ibat_ref = -200;
if active_bus == 1
FCT = 0.082 % stable
% FCT = 0.083 % unstable
end
if active_bus == 2
FCT = 0.238 % stable
% FCT = 0.239 % unstable
end
if active_bus == 3
FCT = 0.238 % stable
% FCT = 0.239 % unstable
end
if active_bus == [1, 2, 3]
FCT = 0.083 % stable
% FCT = 0.084 % unstable
end
end
case '2_1-2'
switch sim_case
case 'NoV2GG2V'
FCT = 0.222 % stable
% FCT = 0.223 % unstable
case 'V2G_FDCC'
Ibatfault_ref = 200 %100
Vfault_thresh = 455
if active_bus == 1
FCT = 0.223 % stable
% FCT = 0.224 % unstable
end
if active_bus == 2
FCT = 0.223 % stable
% FCT = 0.224 % unstable
end
if active_bus == 3
FCT = 0.223 % stable
% FCT = 0.224 % unstable
end
end
otherwise
disp('No simulation case and fault location selected');
end
% Simulation sampling period (seconds)
Ts = 1e-5 % 2e-6
%% Grid Parameters
Sbase = 1e6; % Base nominal power (VA)
Vbase = 345e3; % Base grid voltage (V)
f_grid = 50; % Nominal grid frequency (Hz)
omega = 2*pi*f_grid; % Nominal grid angular speed (rad/s)
% Input mechanical power (p.u.)
Pm1 = 2.49;
Pm2 = 4.21;
Pm3 = 8.20;
% Generator mechanical parameters
H1 = 10;
H2 = 15;
H3 = 60;
D = 20;
% Internal voltage (p.u.)
% (obtained from running case3.m of https://github.com/gajduk/vehicle2grid-stability-analysis)
E1 = 1.07364213042869;
E2 = 1.05726676017896;
E3 = 1.05298913370226;
% RL load power demand at i-th bus (p.u.)
S1pu = (1.5 + .45j);
S2pu = (1.0 + .3j);
S3pu = (12.4 + 2.5j);
% Transmission line reactance (p.u.)
Z12pu = .46j;
Z13pu = .26j;
Z23pu = .0806j;
% per unit (pu) to standard unit (SI)
Zbase = Vbase^2/Sbase;
[R12, L12] = puToSI(Z12pu, Zbase, f_grid);
[R13, L13] = puToSI(Z13pu, Zbase, f_grid);
[R23, L23] = puToSI(Z23pu, Zbase, f_grid);
%% V2GG2V Params
% Grid & LCL filter
Snom_trafo = 1050e6; % transformer nominal power (VA)
Linv = 1/10*0.48e-3; %(Henry)
Lgrid = 1/10*0.69e-3; %(Henry)
Rd = 1.31; %(Ohm)
Cf = 10*165e-6; %(Farad)
% Inverter
C_Vdc = 100*18e-3; %(Farad)
V0_Vdc = 1.5e3; %(Volt)
% Buck-Boost Converter
Lbat = 2e-3; %(Henry)
% Battery
Batt_Vnom = 400; %(Volt)
Batt_Ah = 35; %(Ah)
Batt_InitSOC = 80; %(%)
Batt_RespTime = 2; %(seconds)
% Phase Locked Loop (PLL)
Kp_PLL = 100;
Ki_PLL = 10000;
% PWM Control Switching Frequency
f_SW = 5000; %(Hz)
% DC Link Voltage Control
Vdc_ref = 1.5e3; %(Volt)
Kp_outer = 250;
Ki_outer = 10000;
Kp_inner = 100;
Ki_inner = 5000;
% Battery Current Control
Kp_CC = 10;
Ki_CC = 1;
UpSat_CC = 1;
LowSat_CC = 0;
%% Main Loader
if(~bdIsLoaded(sim_case))
open_system(sim_case, 'window');
end
for i = 1:3
% Set which V2G-G2V bus is active
if (~strcmp(sim_case,'NoV2GG2V'))
if (find(active_bus == i))
set_param([sim_case '/V2G-G2V-' int2str(i)],'commented','off');
else
set_param([sim_case '/V2G-G2V-' int2str(i)],'commented','on');
end
end
% Set the fault location
for i = 1:numel(all_faults)
if (fault_loc == all_faults{i})
set_param([sim_case '/Three-PhaseFault' fault_loc],'commented','off');
else
set_param([sim_case '/Three-PhaseFault' all_faults{i}],'commented','on');
end
end
end
%% Fault starting & clearing time (seconds)
t_fault_start = 0.5;
t_fault_end = t_fault_start + FCT;
%% Run Simulink model & plot figures
sim([sim_case '.slx']);
if (~strcmp(sim_case,'NoV2GG2V'))
for i = 1:3
if (find(plot_bus == i) & find(active_bus == i))
switch sim_case
case 'V2G_Gajduk'
fig_control{i} = eval(['plot_controlGajduk(controlGajduk' int2str(i) ')']);
case 'V2G_FDCC'
fig_control{i} = eval(['plot_controlFault(controlFault' int2str(i) ', Vfault_thresh)']);
end
fig_batt_VDC{i} = eval(['plot_battery_VDC(battery' int2str(i) ', dc_voltage' int2str(i) ')']);
fig_grid_VI{i} = eval(['plot_grid_VI(grid_VI' int2str(i) ')']);
fig_grid_power{i} = eval(['plot_grid_power(grid_power' int2str(i) ')']);
end
end
end
figure();
plot(generator_1.Rotor_angle_theta__rad_.Time, generator_1.Rotor_angle_theta__rad_.Data, 'LineWidth', 2);
hold on;
plot(generator_2.Rotor_angle_theta__rad_.Time, generator_2.Rotor_angle_theta__rad_.Data, 'LineWidth', 2);
hold on;
plot(generator_3.Rotor_angle_theta__rad_.Time, generator_3.Rotor_angle_theta__rad_.Data, 'LineWidth', 2);
legend('\delta_1','\delta_2','\delta_3','Location','southeast');
xlabel('Time (seconds)');
ylabel('Rotor Angle \delta (radians)');
title("Generator Rotor Angles with FCT = "+FCT+" seconds");
grid on;
figure();
plot(generator_1.Rotor_speed_wm__pu_.Time, generator_1.Rotor_speed_wm__pu_.Data,'LineWidth', 2);
hold on;
plot(generator_2.Rotor_speed_wm__pu_.Time, generator_2.Rotor_speed_wm__pu_.Data,'LineWidth', 2);
hold on;
plot(generator_3.Rotor_speed_wm__pu_.Time, generator_3.Rotor_speed_wm__pu_.Data,'LineWidth', 2);
legend('\omega_1','\omega_2','\omega_3','Location','southeast');
xlabel('Time (seconds)');
ylabel('Rotor Speed \omega (per unit)');
title("Generator Rotor Speeds with FCT = "+FCT+" seconds");
grid on;
toc