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Algebraic model and control of embedded multi-terminal DC network in meshed AC power system

机译：网型交流电力系统中嵌入式多终端直流网络的代数模型及控制

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Multi-terminal DC grid can be embedded in meshed AC grid to increase power transmission capability and control power flow of AC grid. In addition to economic benefits especially in congested areas, the proposed solution can provide back-up for the AC grid and enhance power transmission capacity and flexibility. From the supervisory control point of view, a control algorithm is required to set the reference values for controlling the DC grid power flow based on the desired operating points of meshed AC grid. In this paper, the algebraic model of the DC grid is derived and validated in meshed AC power systems. Algebraic model will present the behavior of AC grid with respect to various operating points of the DC grid, and it is used for steady state analysis. This paper also proposes a droop control structure with dead-band controller for the DC grid. To verify the algebraic model and the control structure, dynamic performance of the embedded multi-terminal DC grid in a reduced order three-bus AC equivalent NYPA power system is investigated in PSCAD/EMTDC environment.
机译：多终端直流电网可以嵌入网状交流电流网格，以提高AC电网的电力传输能力和控制电力流量。除了特别是拥挤地区的经济效益外，所提出的解决方案还可以为交流电网提供备用，并提高电力传输能力和灵活性。从监控的视点来看，需要一种控制算法来设置基于网格交流电网的所需操作点来控制DC网格电流的参考值。在本文中，在网状交流电力系统中导出和验证了DC网格的代数模型。代数模型将呈现AC电网对直流电网的各种操作点的行为，它用于稳态分析。本文还提出了具有用于DC网格的带带控制器的下垂控制结构。为了验证代数模型和控制结构，在PSCAD / EMTDC环境中研究了嵌入式多终端直流电网的动态性能三母线AC等效NYPA电力系统。

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