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首页> 外文会议>2014 IEEE PES General Meeting, Conference amp; Exposition >Algebraic model and control of embedded multi-terminal DC network in meshed AC power system
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Algebraic model and control of embedded multi-terminal DC network in meshed AC power system

机译：网状交流电力系统中嵌入式多端直流网络的代数模型与控制

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摘要

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：可以将多端子直流电网嵌入网状交流电网中，以提高输电能力并控制交流电网的潮流。除了特别是在拥挤地区的经济收益外，所提出的解决方案还可以为交流电网提供备用电源，并提高输电能力和灵活性。从监督控制的角度来看，需要一种控制算法，以基于网状交流电网的期望工作点来设置用于控制直流电网潮流的参考值。本文在网状交流电力系统中推导并验证了直流电网的代数模型。代数模型将呈现AC网格相对于DC网格各个工作点的行为，并用于稳态分析。本文还提出了一种带有死区控制器的直流电网下垂控制结构。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端子DC电网在降阶三总线AC等效NYPA电力系统中的动态性能。

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