摘要
为了降低逆变器的谐波,减小开关频率,以便减小开关损耗,提高逆变器效率,该文提出了在太阳能逆变器中采用消谐PWM控制策略,并分析了消谐控制逆变器的设计原理、控制系统结构、输出电压的闭环控制方法等,讨论了数字控制技术的分辨率对输出谐波大小的影响。分析和试验表明:对于类似于太阳能逆变器这种电压和频率变化不大的场合,采用消谐控制具有开关频率低、开关损耗小、输出谐波小、滤波器参数和体积小、易于实现闭环控制等优点,是一种极具潜力的控制策略。
Harmonic elimination PWM control strategy is put forward to use in the solar inverter control for decreasing the harmonic and switching frequency of the inverter and switching loss and improving the inverter efficiency. The design principle, control system structure and the closed loop control method of the output voltage are also analyzed on the basis of harmonic elimination inverter, then the influence of digital resolving ratio on the output harmonic is discussed. The analysis and experiment prove that harmonic elimination control has much advantages such as low switching frequency, low switching loss, low harmonic, small filter volume and parameter, easy realization of closed loop control, etc.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2004年第4期452-456,共5页
Acta Energiae Solaris Sinica
基金
国家自然科学基金项目(50007001)
关键词
逆变器
消谐控制
太阳能
Closed loop control systems
Design
Electric inverters
Harmonic analysis
Networks (circuits)
Pulse width modulation
Solar energy
Switching
