A novel generalized multilevel converter with the application in D-STATCOM

2017 12th IEEE Conference on Industrial Electronics and Applications (ICIEA) Pub Date : 2017-06-01 DOI:10.1109/ICIEA.2017.8282962

Maosong Zhang, Jiawang Li, Bangxiu Chi, Qunjing Wang, Guoli Li, Qiubo Ye

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引用次数: 1

Abstract

The multilevel converter is widely used in the industrial field of high-voltage and high-power. However, the active power of the cascaded multilevel converter cannot freely exchange among the three-phase bridge arm. For the problem, this paper proposed a novel generalized multilevel converter topology, which is composed of a cascaded multilevel converter and a three phase converter with a common capacitor of DC side. Based on this topology, the new Distribution Static Synchronous Compensator (D-STATCOM) can distribute the output voltage of the chain unit and the DC side common-capacitor unit. It is helpful for the realization of the active power exchange between the three phase bridge arms, and realizes the control of the unit DC voltage while realizing the three-phase unbalance compensation of the distribution network. The effectiveness and performance of this topology are verified by simulation and has been tested on a practical operation of 3.3kV equipment. It is possible for D-STATCOM to be used in industrial application of three phase unbalanced compensation in medium voltage distribution network.

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一种新型通用多电平变换器及其在D-STATCOM中的应用

多电平变换器广泛应用于高压大功率工业领域。然而，级联式多电平变换器的有功功率不能在三相桥臂间自由交换。针对这一问题，本文提出了一种新的广义多电平变换器拓扑结构，该拓扑结构由级联多电平变换器和带直流侧公共电容的三相变换器组成。基于这种拓扑结构，新型的分配静态同步补偿器(D-STATCOM)可以对链单元和直流侧共电容单元的输出电压进行分配。有助于实现三相桥臂之间的有功功率交换，在实现配电网三相不平衡补偿的同时实现对机组直流电压的控制。仿真验证了该拓扑的有效性和性能，并在3.3kV设备的实际运行中进行了测试。D-STATCOM可用于中压配电网三相不平衡补偿的工业应用。

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2017 12th IEEE Conference on Industrial Electronics and Applications (ICIEA)

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