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中文摘要：
电压源换流器（voltage sourc econvener，vsc）在稳态模型和工作原理上与传统高压直流输电（high voltagedire ctcurrent，HVDC）的换流器有本质区别，因此传统的交直流系统最优潮流计算方法不适用于含基于电压源换流器高压直流输电（VSC based HVDC，VSC—HVDC）的交直流系统。讨论一种适用于原对偶内点法（primal-dual interior-pointmethod，PDIPM）和预测校正内点法（predictor—corrector PDIPM，PCPDIPM）解最优潮流的VSC—HVDC稳态模型。基于该稳态模型，将VSC．HVDC直流网络与交流系统结合起来，对交直流系统进行联立求解，并对多组算例进行仿真和分析，算例结果表明原对偶内点法在解决含VSC．HVDC的最优潮流问题的能力上，保持了传统内点法最优潮流的高效性，而在同样的条件下，预测-校正内点法迭代次数大大少于原对偶内点法。
英文摘要：
Since the steady-state model and operation principle of voltage source converter （VSC） is totally different from the traditional high voltage direct current （HVDC） converter, optimal power flow （OPF） algorithm for traditional AC-DC system is not suitable for AC-DC system with VSC based HVDC （VSC-HVDC）. The paper presented a steady model of VSC-HVDC system, Which was suitable for solving the OPF problem by using primal-dual interior-point method （PDIPM） and predictor-corrector PDIPM （PCPDIPM）. Based on the steady model, DC network and AC system were combined together, and calculations of several testing cases were performed on this hybrid system. Simulation and comparison results indicate that PDIPM retains high performance of the traditional interior-point algorithm in solving the OPF problem of VSC-HVDC, while in the same situations, the number of iteration by using PCPDIPM is much less than that using by PDIPM.
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