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首页> 外文期刊>International journal of electrical and power engineering >Analysis of Three Phase Four Wire Inverter for UPS Fed Unbalanced Star Connected Load
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Analysis of Three Phase Four Wire Inverter for UPS Fed Unbalanced Star Connected Load

机译：UPS馈电不平衡星形连接负载三相四线逆变器分析

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摘要

A Three phase inverter with a neutral connection i.e., three phase four wire inverter is proposed. The UPS system is fed by three phase four wire inverter and the load neutral point voltage is low to meet the requirement of the system. The four leg inverters effectively provide the neutral connection in three phase four wire system. They are used in many applications to handle the neutral current caused by the unbalanced and non-linear load. The unbalanced load becomes non-linear where the neutral of the loads are accessible. The four leg inverter produces the three output voltages independently with one additional leg. The main feature of a three phase inverter with an additional neutral leg is its ability to deal with load unbalance in a system. The goal of the three phase four leg inverter is to maintain the desired sinusoidal output voltage waveform for all loading conditions and transients. The neutral connection is present to handle the ground current due to unbalanced loads. The feasibility of the proposed modulation technique is verified by Matlab/Simulink.
机译：提出了一种具有零线连接的三相逆变器，即三相四线逆变器。 UPS系统由三相四线逆变器供电，负载中性点电压低，可以满足系统要求。四脚逆变器可有效地在三相四线制系统中提供零线连接。它们在许多应用中用于处理由不平衡和非线性负载引起的中性线电流。在中性点可触及的地方，不平衡负载变为非线性。四脚逆变器通过一个附加脚独立产生三个输出电压。具有附加中性点的三相逆变器的主要特征是其处理系统负载不平衡的能力。三相四脚逆变器的目标是在所有负载条件和瞬态情况下保持所需的正弦输出电压波形。由于负载不平衡，存在零线连接以处理接地电流。 Matlab / Simulink验证了所提出的调制技术的可行性。

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