An IGBT based series power flow controller for multi-terminal HVDC transmission
An IGBT based series power flow controller for multi-terminal HVDC transmission
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DOI：
10.1109/upec.2014.6934626
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
S. Balasubramaniam;Jun Liang;C. E. Ugalde-Loo
中科院分区：
文献类型：
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作者：
S. Balasubramaniam;Jun Liang;C. E. Ugalde-Loo
海上风电渗透率的增加提高了对多端高压直流（MTDC）电网的需求。MTDC系统将实现跨境能源交换，多余的能源可以在国家之间转移，从而提高网络的功能和可靠性。然而，随着终端和分支的数量增加，潮流管理成为一个挑战。为了提高可靠性和效率，需要重新调度终端之间的潮流。这可以通过引入功率流控制器（PFC）来实现。本文提出了一种基于绝缘栅双极晶体管的串联PFC。PFC基本上是与DC线路串联连接的低功率额定可控电压源。它能够通过一个小的串联电压注入调节电网功率流。一个四端MTDC系统建模使用Simulink/ SimPowerSystems测试所提出的设备的影响。这是根据两种不同的控制策略下分析的电压源转换器为基础的终端，即主从和电压下垂控制。仿真结果表明，PFC是能够提高系统的性能，通过适当的重定向在连接点的功率流。此外，结果清楚地表明，转换器的控制模式有效地影响在MTDC电网的功率流。
Increased offshore wind penetration has raised the need of multi-terminal high-voltage direct-current (MTDC) grids. An MTDC system will enable cross-border energy exchange where the excessive energy can be transferred between countries, increasing the functionality and reliability of the network. However, as the number of terminals and branches increases, power flow management becomes a challenge. To improve reliability and efficiency, power flow needs to be rescheduled between terminals. This can be achieved by introducing a power flow controller (PFC). In this paper, an insulated-gate bipolar transistor based series PFC is proposed. A PFC is basically a low power rated controllable voltage source connected in series with a DC line. It enables the regulation of grid power flow via a small series voltage injection. A four-terminal MTDC system is modelled using Simulink/ SimPowerSystems to test the impact of the proposed device. This is analysed under two different control strategies for the voltage source converter-based terminals; namely, master-slave and voltage droop control. Simulation results show that the PFC is capable of enhancing the system performance by suitably redirecting the power flow at the point of connection. Moreover, the results clearly illustrate that the converter control modes effectively affect the power flow in the MTDC grid.