Distributed generation interface using indirect matrix converter in boost mode with controllable grid side reactive power

Xiong Liu, Peng Wang, P. Loh, F. Blaabjerg
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引用次数: 9

Abstract

Indirect matrix converter (IMC) using two stages configuration is topologically more flexible than 3×3 direct matrix converter (DMC). For grid integration of ac type distributed generators, the ac/ac converters need voltage boost function, which can't be achieved by traditional IMC due to its limited input-to-output voltage transfer gain 0.866. Alternatively, reverse power flow operation of IMC can be implemented to meet voltage boost requirement for distributed generation interface. Intuitively, only the generator side power needs to be controlled, since the power will be spontaneously transferred to the grid side due to the lack of energy storage in IMC. However, open-loop operation of grid side (current source side) converter will lead to uncontrollable grid side reactive power. This paper proposes control schemes of IMC with controllable grid side reactive power by means of controlling both the generator and grid side currents coordinately with properly designed control loop. Simulation results are provided to validate the effectiveness of the control schemes for the proposed matrix converter.
分布式发电接口采用升压方式的间接矩阵变换器,并网侧无功功率可控
采用两级结构的间接矩阵变换器(IMC)在拓扑结构上比3×3直接矩阵变换器(DMC)更灵活。对于交流型分布式发电机的电网集成,交流/交流变换器需要升压功能,传统的IMC由于输入输出电压转移增益0.866的限制而无法实现升压功能。也可以实现IMC的反向潮流操作,以满足分布式发电接口的升压要求。直观上,只需要控制发电机侧的功率,由于IMC缺乏储能,功率会自发地转移到电网侧。然而,电网侧(电流源侧)变流器的开环运行将导致电网侧无功功率不可控。本文通过合理设计控制回路,对发电机和电网侧电流进行协调控制,提出了电网侧无功功率可控的自动同步控制方案。仿真结果验证了所提矩阵变换器控制方案的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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