矿用高压变频器开关调制优化策略

基金项目:

山西省科技重大专项项目（MJ2016—01）

Optimization strategy of switching modulation of mine—used high—voltage frequency converter

1.
College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2.
Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
3.
Shanxi Fenxi Heavy Industry Co., Ltd., Taiyuan 030027, China

摘要: 针对矿用高压变频器采用载波调制PWM控制法时存在开关损耗大、电能质量畸变的问题，在载波同相层叠PWM控制法的基础上，对正弦调制波进行优化。通过对正弦调制波叠加3次谐波和直流分量，得到正半周为马鞍形调制波、负半周为梯形调制波的优化调制波。仿真结果表明，优化调制波的应用提高了变频器直流电压利用率，减小了开关损耗，降低了输出线电压总谐波畸变率。
Abstract: For problems of high switching loss and power quality distortion when carrier modulation PWM control method were used in mine—used high—voltage frequency converter. Sinusoidal modulation wave was optimized based on carrier—in—phase disposition PWM control method. The sinusoidal modulation wave is superimposing with the third harmonic and direct current component, so as to obtain an optimized modulation wave with saddle—shaped modulation wave in positive half—cycle and trapezoidal modulation wave in negative half—cycle. The simulation results show that DC voltage utilization of frequency converter is improved, switching loss and total harmonic distortion of output line voltage is reduced by use of the optimized modulation wave.
- mine—used high—voltage frequency converter /
- switching modulation /
- switching loss /
- carrier modulation PWM control /
- carrier—in—phase disposition PWM control