关冠晖 傅伟豪
摘 要 一种逆变电路采用IGBT桥,逆变方式为SPWM,两个逆变电源并联运行。该电源采用LC滤波器,主要滤除高次谐波。逆变电源采用压瞬时值反馈单环PID控制,改善输出波形质量。该并联逆变电源在Matlab的Simulink组件中模拟,分别测试分析了带动线性负载动态均流效果和非线性负载静态均流效果。
关键词 逆变电源 SPWM 并联运行 PID控制
中图分类号:TM743 文献标识码:A DOI:10.16400/j.cnki.kjdks.2016.12.027
Abstract An inverter circuit uses IGBT bridge, the inverter mode is SPWM, and the two inverters are connected in parallel. The power supply using LC filter, mainly to filter out high. The inverter is controlled by the instantaneous value feedback loop PID, which improves the quality of the output waveform. The parallel inverter is simulated in the Simulink component of Matlab, and it is tested and analyzed respectively to drive the dynamic current sharing effect of linear load and the effect of static load current of nonlinear load.
Keywords inverter power supply; SPWM; parallel operation; PID control
1 主電路参数设计与选型
1.1 直流电压,额定电流与IGBT选型
选择输出线电压有效值为380V+-5%,额定容量100kVA,故选择直流电压、额定电流如下:
注释
[1] 杨荫福,段善旭,朝泽云.电力电子装置及系统[M].北京:清华大学出版社,2006:66-83.
[2] 俞杨威,金天均,谢文涛,吕征宇.基于PWM逆变器的LC滤波器[A].李辉.机电工程[C].杭州:浙江大学电力电子研究所,2007:50-52.
[3] 孙朝晖,吴浩伟,方斌,耿攀.采用PID和重复控制的逆变器波形控制策略[A].船电技术[C].武汉:武汉第二船舶设计研究所,2010:14-17.