摘要
电容滤波型三相不控整流电路的工作模式可分为电流断续模式和电流连续模式。按照工作过程中导通的功率元件数,存在两种断续工作模式,即"2/0"模式和"2/3/2/0"模式。2/3/2/0模式状态间切换过程复杂,且对应特定的负载范围,以往对于整流装置断续模式的研究多集中于2/0模式。本文利用经典电路分析方法,分析了"2/3/2/0"模式下不同导通状态的等效电路及各状态间的边界条件,同时利用电压电流的周期对称性,列写了解析表达式。经过数学推导,将1/6周期内整流电路状态切换用五元微分方程组来表达,通过数值计算,求解了该方程组。按照上述步骤分析得到电压、电流的谐波含量,与仿真结果相对比,验证了所提分析方法的正确性。
The operation mode of the capacitor-filtered three-phase uncontrolled rectifier can be divided into continuous current mode and discontinuous current modeflnaccordance with the number of conducted power devices in the operation, there are two discontinuous current modes, i.e. ＇2/0＇ mode and ＇2/3/2/0＇ modes. Because the switching process of 2/3/2/0 mode is complex, and the corresponding load range is specific, the research before mostly concentrated in 2/0 mode. Numerical analysis is applied in this paper to study the 2/3/2/0 mode. According to the equivalent circuit and boundary conditions in different stages, by taking advantage of the symmetry of the voltage and current, parsing expressions are listed. Mathematical derivation is made to describe the circuit states switches during 1/6 of a period by a five-element differential equations system and to solve the system in a numerical way. Following the above steps, the harmonic content of voltage and current is analyzed. Compared with the simulation results, the correctness of the proposed method is verified.
作者
徐尘
付立军
Xu Chen Fu Lijun(National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan 43003)
出处
《电气技术》
2018年第2期36-41,共6页
Electrical Engineering
基金
国家自然科学基金资助项目(51507184)
国家重点基础研究发展计划资助项目(2015CB251004)
关键词
不控整流器
断续模式
数值分析
rectifier
discontinuous current mode
numerical analysis
