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首页> 外文期刊>Electric power systems research >Coordinated direct current matching control strategy for multi-terminal DC transmission systems with integrated wind farms
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Coordinated direct current matching control strategy for multi-terminal DC transmission systems with integrated wind farms

机译：集成风电场的多终端直流输电系统的协调直流匹配控制策略

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摘要

A new direct current matching control (DCMC) scheme is proposed in this paper. The scheme is ideally suited for the integration of a large number of wind farms with AC grid systems via a multi-terminal HVDC (MTDC) network incorporating several grid-side converters. The proposed DCMC, which matches, in a near-instantaneous fashion, the cumulative injected DC currents from all wind farms with the total of the output DC currents to the AC grids (via inverters) by communicating real-time data between all terminals, is an improvement upon and potential replacement for conventional DC voltage droop and master-slave control strategies. Through the utilization of a wide-area supervisory control and data acquisition (WA-SCADA) system, the proposed DCMC aims to enhance MTDC network voltage stability and facilitate flexible power dispatch to the supplied AC grids, while maximizing the total amount of generated wind power and offering more flexibility in terms of the ability for wind farms to independently control and maximize their outputs without any requirement for output to be constrained. A six-terminal MTDC system connecting three wind farms to three independent mainland AC grids is used to validate the proposed DCMC and compare its performance with conventional control strategies, three simulation studies are carried out to test and verify the DCMC. (C) 2015 Elsevier B.V. All rights reserved.
机译：本文提出了一种新的直流匹配控制方案。该方案非常适合通过多终端HVDC（MTDC）网络将多个风电场与AC电网系统集成在一起，该网络包含多个电网侧转换器。拟议中的DCMC通过以下方式将所有风场的累计注入直流电流与通过交流所有终端之间的实时数据（通过逆变器）流向交流电网的总输出直流电流相匹配，即：传统DC电压下降和主从控制策略的改进和潜在替代。通过利用广域监督控制和数据采集（WA-SCADA）系统，拟议的DCMC旨在增强MTDC网络的电压稳定性并促进向所提供的AC电网灵活分配电力，同时最大程度地提高风力发电量并提供更大的灵活性，使风电场能够独立控制并最大化其输出，而无需限制输出。使用六个端子的MTDC系统将三个风电场连接到三个独立的大陆AC电网，以验证建议的DCMC并将其性能与常规控制策略进行比较，并进行了三项仿真研究以测试和验证DCMC。 （C）2015 Elsevier B.V.保留所有权利。

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