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首页> 外文期刊>Electric power systems research >A control strategy for an offshore wind farm with the generating units connected in series with a VSC-HVDC transmission link
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A control strategy for an offshore wind farm with the generating units connected in series with a VSC-HVDC transmission link

机译：发电机组与VSC-HVDC传输链路串联的海上风电场的控制策略

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This paper proposes a control strategy for an offshore wind farm with the generating units connected in series with a DC transmission link. This configuration presents the advantage of not requiring an offshore substation with a power transformer to increase the power plant terminal voltage since the generators are connected in series through the DC terminals of the interface rectifiers. On the other side, the energy transferred by the subsea DC cable is processed by a modular multilevel inverter before it is injected into the mains. The modular multilevel inverter regulates the current through the DC link cable instead of the voltage of the DC system. This choice allows all the generating units to transfer maximum power through the DC link cable without the need of any communication channel to exchange information between the offshore units and the onshore substation. The system controllers are designed to assure the stable operation of the proposed strategy. Digital simulations results, obtained with PSCAD/EMTDC, are used to validate the effectiveness of the designed controllers and to demonstrate the performance of the system for different operational conditions.
机译：本文提出了一种海上风力发电场的控制策略，其发电机组与直流输电链路串联。这种构造的优点在于，由于发电机是通过接口整流器的DC端子串联连接的，因此不需要具有电力变压器的海上变电站来增加电站的端子电压。另一方面，在将海底直流电缆传输的能量注入电网之前，它会先经过模块化的多电平逆变器进行处理。模块化多电平逆变器调节通过直流母线电缆的电流，而不是调节直流系统的电压。这种选择使所有发电机组都可以通过直流链路电缆传输最大功率，而无需任何通信通道即可在离岸机组和陆上变电站之间交换信息。系统控制器旨在确保所提出策略的稳定运行。使用PSCAD / EMTDC获得的数字仿真结果可用于验证所设计控制器的有效性，并演示系统在不同操作条件下的性能。

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