Power flow analysis of multi-terminal HVDC networks
Power flow analysis of multi-terminal HVDC networks
复制标题
多端高压直流输电网络潮流分析
DOI：
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发表时间：
2011
期刊：
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通讯作者：
K. Uhlen
中科院分区：
文献类型：
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作者：
T. M. Haileselassie;K. Uhlen
随着对HVDC连接需求的增加，特别是在北海地区，合适的换流器技术的可用性为建立多端HVDC电网开辟了潜力。这样的直流网络需要一个单独的潮流分析方法，而不是传统的方法用于交流网络的问题。本文讨论了一种基于牛顿-拉夫逊近似的多端高压直流输电网络潮流分析的数值迭代方法。对该方法进行了测试，以分析五端高压直流电网的潮流。据观察，即使未知节点电压的初始猜测不佳，迭代方法在几个迭代步骤内给出了所需误差容限的收敛解。
Availability of suitable converter technologies added with increasing demands for HVDC connection, especially in the North Sea area, opens the potential for establishing multi-terminal HVDC grid. Such dc network requires a separate power flow analysis method as opposed to the conventional method employed for ac network problems. This paper discusses a numerical iteration method based upon the Newton-Raphson approximation for analysing power flow in multi-terminal HVDC networks. The method was tested to analyse the power flow of a five terminal HVDC grid. It was observed that even with poor initial guesses of the unknown nodal voltages; the iterative method was giving a convergent solution of the required error margin within few iteration steps.