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Current Matching Control system for Multi-Terminal DC transmission to integrate offshore wind farms

机译：多终端直流输电电流匹配控制系统，用于整合海上风电场

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摘要

The inherent features of Voltage Source Converters (VSCs) are attractive for practical implementation of Multi-Terminal HVDC transmission systems (MTDC). MTDC can be used for large-scale integration of offshore wind power with onshore grids. However, many of the control strategies for MTDC that have been proposed previously for offshore wind farm integration depend on local control of the wind turbine generators. This paper proposes a new control strategy, termed Current Matching Control (CMC), which can be used with any number of converter terminals, and is independent of the types of wind turbines used within each wind farm. The proposed CMC matches the current reference of the grid side converter to that of the wind farm side converters. In order to achieve such current matching, a telecommunication system will be required to facilitate calculations of the grid side current references to be carried out in real time. To validate the performance of the proposed control strategy, a generic four-terminal MTDC network, which integrates two offshore wind farms with two mainland grids, is simulated and results relating to several steady state and transient scenarios are presented.
机译：电压源转换器（VSC）的固有特性对于多端子HVDC传输系统（MTDC）的实际实施具有吸引力。 MTDC可用于海上风电与陆上电网的大规模整合。但是，先前针对海上风电场整合提出的许多MTDC控制策略都依赖于风力涡轮发电机的本地控制。本文提出了一种新的控制策略，称为电流匹配控制（CMC），该策略可与任意数量的变流器终端一起使用，并且与每个风力发电场中使用的风力涡轮机的类型无关。拟议的CMC将电网侧转换器的电流参考与风电场侧转换器的参考进行匹配。为了实现这种电流匹配，将需要电信系统来促进对电网侧电流基准的实时计算。为了验证所提出的控制策略的性能，对一个通用的四端MTDC网络进行了仿真，该网络将两个海上风电场与两个大陆电网集成在一起，并给出了与几种稳态和瞬态情况有关的结果。

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