AC/DC/AC调频式谐振高压试验电源控制策略  

Control strategy of AC/DC/AC high-voltage FTRTPS

作　　者：徐先勇[1] 罗安[1] 方璐[1] 刘定国[1] 罗卓伟[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电力自动化设备》2010年第2期67-71,共5页Electric Power Automation Equipment

基　　金：国家自然科学基金项目(60774043);湖南省研究生科研创新项目(湘财教指[2008]68号)~~

摘　　要：传统的调频式谐振高压试验电源采用模拟器件产生幅值、频率可调的正弦信号,由大功率三极管组成的多级放大电路得到大功率正弦信号,电路复杂、不易维护。提出以大功率开关器件IGBT产生局部放电试验或交流耐压试验所需的正弦信号。新型调频式谐振高压试验电源的系统主要由三相PWM整流电路、H桥逆变电路、输出滤波器、检测单元、DSP控制器及人机接口(键盘、液晶)组成。针对电压调节提出应用自适应PI的以电网电流为内环、直流电容电压为外环的双闭环控制策略,对于电压调节由三相PWM整流电路实现;针对频率调节提出应用比例积分锁相自动调频控制策略,频率调节由H桥逆变电路实现。采用Matlab/Simulink仿真工具搭建了系统的仿真模型,仿真及试验结果表明,所提出的控制方案动、静态性能良好,鲁棒性强。Traditional high-voltage FTRTPS（Frequency-Tuned Resonant Test Power Supply） employs the analog devices to generate the amplitude- and frequency-tunable sinusoidal signal and the multistage amplifier of high-power triodes to generate high-power sinusoidal signal,which is complicated and not easy to maintain. It is proposed to employ high-power switching device IGBT to generate sinusoidal signal for local discharge test or AC voltage-withstand test. It is composed of the three-phase PWM rectifier,H-bridge inverter,output filter,detection unit,DSP controller and MMI（keyboard and liquid crystal display）. For voltage regulation,the three-phase PWM rectifier and adaptive PI dual-loop control is applied,with the power grid current as inner loop and the DC capacitor voltage as outer loop. For frequency regulation,the H-bridge inverter and proportional integral phase-locked frequency-tuned strategy is applied. Its simulation model is established with Matlab/Simulink and the simulative and experimental results show that,the proposed control strategy has good dynamic and static performance and robustness.

关 键 词：自适应PI PI锁相控制 PWM整流电路 调频式谐振试验电源 电源控制策略 

分 类 号：TM919[电气工程—电力电子与电力传动] TM832