高速发电机用宽电压范围双管Buck-Boost变换器暂态稳定分析与系统校正  

Transient analysis and system compensation of two-switch Buck-Boost converter for high-speed generator with a wide voltage range

作　　者：台流臣[1] 林明耀[1] 骆皓[2,3] 付兴贺[1] 刘凯[1] 

机构地区：[1]东南大学伺服控制技术教育部工程研究中心,江苏南京210096 [2]南京工程学院,江苏南京211167 [3]国电南京自动化股份有限公司,江苏南京210032

出　　处：《电机与控制学报》2016年第12期32-41,共10页Electric Machines and Control

基　　金：国家自然科学基金(51307022;51507030);江苏省自然科学基金(BK20141095)

摘　　要：高速永磁发电机宽速度范围运行时输出电压波动大,当发电机输出端接双管Buck-Boost变换器进行调压时,宽电压范围输入对变换器的稳定性和动态性能提出挑战。本文采用平均开关法建立了双管Buck-Boost变换器电感电流连续的非理想小信号模型,基于该模型分析了占空比、负载、输出滤波电容等效ESR、控制参数等对系统暂态稳定性能的影响,给出了提高系统暂态性能的控制参数设计方法。分析研究发现:占空比的变化导致系统的非最小相位反应明显,系统的动态响应变差;负载变化时系统的动态响应变化小;增大输出滤波电容等效ESR可以改善系统的动态性能。仿真和实验结果验证了暂态稳定分析和控制参数设计的合理性。The output voltage range of high-speed permanent magnet generator is wide. As two-switch Buck-Boost （TSBB） converter is used in the output of the generator to regulate the DC voltage, the wide input voltage range will challenge the stability and dynamic performance of converter. The low-frequency small-signal models of TSBB converter which works in the continuous conduction mode （CCM） were built by averaged switch model. The influence, such as the duty ratio, load, equivalent series resistance （ESR） of output filter capacitor and the right half plane （RHP） zero on the transient stability of control system was analyzed separately. The method of control parameter design to improve transient performance was given. When duty cycle changed, the reaction of non-minimum phase system was obvious, and the dynamic response of the system became bad. The dynamic response of the system caused by different load variations changed little. ESR of filter capacitor can effectively improve the dynamic performance of the system. Finally, the transient analysis and control design parameters rationality are verified by the simulation and experimental results.

关 键 词：双管Buck-Boost变换器 开关平均法 右半平面零点 动态响应 补偿 

分 类 号：TM46[电气工程—电器]