Selection of parameters for balancing circuit of DC-DC and AC-AC multicell converters
Selection of parameters for balancing circuit of DC-DC and AC-AC multicell converters
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DC-DC和AC-AC多节变换器平衡电路参数的选择
DOI：
10.1109/epe.2005.219297
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
R. Stala
中科院分区：
文献类型：
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作者：
S. Piróg;R. Stala
本文提出了一种带平衡电路的多单元DC/DC和AC/AC变换器。多单元转换器使用放置在每个单元中的不同值的电压源。低电容电容器可用作电池的源极。但是在这种情况下，可能会出现源电容器电压的不适当比例，这在多电平变换器中是非常危险的。为了消除这种电压不平衡，RLC串联电路（平衡电路）与负载并联。介绍了平衡电流稳定电池电容电压的现象、变换器的数学描述、不平衡状态下电源的能量转移、系统对平衡电路参数变化的敏感性。针对三单元DC/DC变换器，分析了平衡电路参数对变换器动态特性和稳态损耗的影响。在ac/ac多单元变换器中，平衡电路参数决定变换器的稳态。对于三单元AC/AC变换器，给出了系统中影响单元电压比例的所有参数
The paper presents a dc/dc and ac/ac multicell converters with balancing circuit. The multicell converters use voltage sources of different values placed in every cell. Low capacitance capacitors may be used as the cells' sources. But in that case an improper proportion of the source capacitors voltages can occur, which is very dangerous in multilevel converters. To eliminate this voltage unbalance the RLC series circuit (balancing circuit) is connected to load in parallel. Phenomenon of stabilization of voltages on cells' capacitors by balancing current, mathematical description of the converter, energy transfer from source under unbalance state, sensibility of the system for balancing circuit parameters variation is presented. For three-cell dc/dc converter dynamical states and power losses in steady state versus parameters of the balancing circuit are analyzed. In ac/ac multicell converter the balancing circuit parameters determines the converter's steady state. For three-cell ac/ac converter all quantities of the system that affect the proper proportion of cells' voltages are presented