CAJ | 학술논문

多逆变器并联系统中往往会存在环流，包括直流环流、工频环流以及开关频率环流。目前提出的环流分析和环流抑制的方法大部分都是针对直流、工频及其谐波环流的。而对于开关频率环流，并没有定量地分析开关环流与电路参数之间的关系。基于开关器件的开通和关断过程，该文提出了一种由于器件开关状态不同步而产生的开关频率环流的数学模型。另外，该文还详细研究和分析了开关环流与电路参数之间的定量关系。基于分析结果，进一步提出了能够较好地抑制开关环流的电路参数设计原则。实验结果很好地验证了所提出的数学模型的准确性和电路参数设计原则的有效性。
다역변기병련계통중왕왕회존재배류，포괄직류배류、공빈배류이급개관빈솔배류。목전제출적배류분석화배류억제적방법대부분도시침대직류、공빈급기해파배류적。이대우개관빈솔배류，병몰유정량지분석개관배류여전로삼수지간적관계。기우개관기건적개통화관단과정，해문제출료일충유우기건개관상태불동보이산생적개관빈솔배류적수학모형。령외，해문환상세연구화분석료개관배류여전로삼수지간적정량관계。기우분석결과，진일보제출료능구교호지억제개관배류적전로삼수설계원칙。실험결과흔호지험증료소제출적수학모형적준학성화전로삼수설계원칙적유효성。
There are circulating currents among the parallel inverters, including dc, fundamental and switching frequency circulating currents. Analysis and suppression methods currently proposed primarily focus on dc and fundamental circulating currents. However, the relationship between the switching frequency circulating current and circuit parameters has not been analyzed quantitatively so far. Based on the switching process of devices, a mathematical model of switching frequency circulating currents generated by asynchronous switching states is proposed in this paper. Moreover, the quantitative relationships between the switching frequency circulating current and the circuit parameters are investigated and analyzed in detail. Based on the analytical results, favorable design guidelines to restrain the switching frequency circulating currents are further presented. The experimental results perfectly validate the accuracy of the proposed mathematical model and the effectiveness of the design guidelines.