具有逆变电源负载的柴油发电机系统仿真研究

Simulation of Diesel Engine Driven Generator with Welding Inverter as Load

建立了具有逆变电源负载的小型柴油发电机系统的Simulink仿真模型,其中逆变电源本身又具有冲击性负载,柴油发电机有转速和励磁自动控制环节。仿真试验得到了柴油发电机转速、输出机械功率、励 磁电压的变化规律,励磁调节过程的曲线;发电机端口输出电量的变化规律;逆变电源的闭环调节过程和参量的变化规律;发电机电动势及输出电压的谐波分析、频谱分析和总谐波歧变率分析。对比了负载不变和负载冲击变化时对系统参量的影响。仿真试验结果与实际相符,本仿真模型是独立供电系统和移动电源系统计算机辅助分析和设计的有效工具。

The Simulink simulation model of small scale diesel engine driven generator with welding inverter as load is setup, while the welding inverter often suffers short circuit shock. Diesel engine speed is controlled automatically, and generator has AVR. Following result is achieved through simulation: engine speed, engine output mechanical power, exciting voltage, output electrical quantum of generator, and electrical quantum of inverter changing with time. Harmonic analysis, spectrum analysis and Total Harmonic Distortion of output voltage and electromotive force of generator are also achieved. Effect on system electrical quantum is compared when bearing normal load and short circuit. Simulation result is testified through experiment. This simulation model is an effective method for independent or movable power system design and analysis.