手把手教你学simulink（31.18）--双向DCDC电源场景示例：基于双闭环控制的simulink双向dcdc应用电动汽车实例

% 创建新的Simulink模型  
model_name = 'ev_bidirectional_dc_dc_dual_loop';  
new_system(model_name);  

% 添加模块  
add_block('simscapes/Simscape Electrical/Specialized Power Systems/Sources/DC Voltage Source', [model_name '/DC Voltage Source']);  
add_block('simscapes/Simscape Electrical/Specialized Power Systems/Power Electronics/Bidirectional DC-DC Converter', [model_name '/Bidirectional DC-DC Converter']);  
add_block('simscapes/Simscape Electrical/Electrical Elements/Battery', [model_name '/Battery']);  
add_block('simscapes/Simscape Electrical/Specialized Power Systems/Measurements/Current Measurement', [model_name '/Current Sensor']);  
add_block('simscapes/Simscape Electrical/Specialized Power Systems/Measurements/Voltage Measurement', [model_name '/Voltage Sensor']);  
add_block('simulink/Continuous/PI Controller', [model_name '/PI_Voltage']); % 电压外环控制器  
add_block('simulink/Continuous/PI Controller', [model_name '/PI_Current']); % 电流内环控制器  
add_block('simscapes/Simscape Electrical/Specialized Power Systems/Control & Measurements/Pulse & Signal Generators/PWM Generator (2-Level)', [model_name '/PWM Generator']);  
add_block('simulink/Sinks/Scope', [model_name '/Scope']);  
add_block('simscapes/Simscape Electrical/Machines/AC Motors/Asynchronous Machine SI Units', [model_name '/Motor Load']); % 电机负载  
add_block('simscapes/Simscape Electrical/Specialized Power Systems/Power Electronics/Boost Converter', [model_name '/Brake Energy Recovery System']); % 制动能量回收系统  

% 连接模块  
add_line(model_name, 'DC Voltage Source/1', 'Bidirectional DC-DC Converter/1'); % 电源到变换器  
add_line(model_name, 'Bidirectional DC-DC Converter/1', 'Battery/1'); % 变换器到电池  
add_line(model_name, 'Battery/1', 'Bidirectional DC-DC Converter/2'); % 电池到变换器  
add_line(model_name, 'Battery/1', 'Voltage Sensor/1'); % 电池电压监测  
add_line(model_name, 'Battery/1', 'Current Sensor/1'); % 电池电流监测

% 电压外环  
add_line(model_name, 'Voltage Sensor/1', 'PI_Voltage/1'); % 电池电压反馈到电压外环控制器  
add_line(model_name, 'PI_Voltage/1', 'PI_Current/Setpoint'); % 电压外环输出作为电流内环的参考

% 电流内环  
add_line(model_name, 'Current Sensor/1', 'PI_Current/1'); % 电池电流反馈到电流内环控制器  
add_line(model_name, 'PI_Current/1', 'PWM Generator/DutyCycle'); % 电流内环输出控制PWM占空比

% PWM控制  
add_line(model_name, 'PWM Generator/1', 'Bidirectional DC-DC Converter/3'); % PWM信号控制变换器

% 电机负载和制动能量回收  
add_line(model_name, 'Battery/1', 'Motor Load/1'); % 电池到电机负载  
add_line(model_name, 'Motor Load/1', 'Brake Energy Recovery System/1'); % 电机负载到制动能量回收系统  
add_line(model_name, 'Brake Energy Recovery System/1', 'Bidirectional DC-DC Converter/2'); % 制动能量回收系统到变换器

% 显示结果  
add_line(model_name, 'Voltage Sensor/1', 'Scope/1'); % 显示电池电压  
add_line(model_name, 'Current Sensor/1', 'Scope/2'); % 显示电池电流  

set_param([model_name '/DC Voltage Source'], 'Amplitude', '400');  

set_param([model_name '/Bidirectional DC-DC Converter'], 'SwitchingFrequency', '100000'); % 开关频率为100kHz  

set_param([model_name '/Battery'], 'InitialVoltage', '300'); % 初始电压为300V  
set_param([model_name '/Battery'], 'Capacity', '50'); % 容量为50Ah  
set_param([model_name '/Battery'], 'InternalResistance', '0.1'); % 内阻为0.1Ω  

% 电压外环控制器  
set_param([model_name '/PI_Voltage'], 'P', '50'); % 电压外环的比例增益  
set_param([model_name '/PI_Voltage'], 'I', '500'); % 电压外环的积分增益

% 电流内环控制器  
set_param([model_name '/PI_Current'], 'P', '100'); % 电流内环的比例增益  
set_param([model_name '/PI_Current'], 'I', '1000'); % 电流内环的积分增益  

set_param([model_name '/PWM Generator'], 'Frequency', '100000'); % PWM频率为100kHz  
set_param([model_name '/PWM Generator'], 'DutyCycle', '0.5'); % 初始占空比为0.5  

set_param([model_name '/Motor Load'], 'NominalPower', '100e3'); % 最大功率为100kW  
set_param([model_name '/Motor Load'], 'NominalSpeed', '3000'); % 额定转速为3000rpm  

set_param([model_name '/Brake Energy Recovery System'], 'SwitchingFrequency', '100000'); % 开关频率为100kHz  

set_param([model_name '/Scope'], 'NumInputs', '2'); % 两个输入通道  
set_param([model_name '/Scope'], 'TimeRange', '0.01'); % 时间范围为0.01秒  

set_param(model_name, 'StopTime', '0.05'); % 仿真时间为0.05秒  
set_param(model_name, 'Solver', 'ode23tb'); % 使用ode23tb求解器  

% 运行仿真  
sim(model_name);

% 打开Scope查看结果  
open_system([model_name '/Scope']);