Voltage Control Scheme with Distributed Generation and Grid Connected Converter in a DC Microgrid
Voltage Control Scheme with Distributed Generation and Grid Connected Converter in a DC Microgrid
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直流微电网中分布式发电和并网变流器的电压控制方案
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Moon
中科院分区：
文献类型：
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作者：
Jongchan Choi;Horyung Jeong;Jin;Dongjun Won;Seon;S. Moon
直流（DC）微电网由于DC能源和电力负载的快速增长而预期变得更大。随着电力系统规模的扩大，电压控制对电力系统稳定运行的重要性日益突出。直流微电网电压控制方法的研究很多，但大多数研究都集中在小规模的微电网上，如建筑物微电网。因此，需要一种新的控制方法，用于中或大规模的直流微电网。分析了大型直流微电网的电压降问题，提出了一种分布式发电机（DG）和并网变流器（GCC）协同电压控制方案。对于分布式电源的电压控制，应考虑其位置和容量，以使系统经济运行。因此，提出了一种最优DG分配算法，以最大限度地减少DG的容量，用于直流微电网的电压控制。通过MATLAB和PSCAD/EMTDC仿真，对典型负荷类型进行了验证。
Direct Current (DC) microgrids are expected to become larger due to the rapid growth of DC energy sources and power loads. As the scale of the system expends, the importance of voltage control will be increased to operate power systems stably. Many studies have been performed on voltage control methods in a DC microgrid, but most of them focused only on a small scale microgrid, such as a building microgrid. Therefore, a new control method is needed for a middle or large scale DC microgrid. This paper analyzes voltage drop problems in a large DC microgrid and proposes a cooperative voltage control scheme with a distributed generator (DG) and a grid connected converter (GCC). For the voltage control with DGs, their location and capacity should be considered for economic operation in the systems. Accordingly, an optimal DG allocation algorithm is proposed to minimize the capacity of a DG for voltage control in DC microgrids. The proposed methods are verified with typical load types by a simulation using MATLAB and PSCAD/EMTDC.