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该文研究大规模交直流电网最优潮流计算的精确模型以及适用于大规模电网的最优潮流求解算法。首先将高压直流输电系统准稳态模型进行化简，通过选择合理的基准值将该模型进行标幺化，并与交流潮流方程联立，建立交直流电网准稳态最优潮流模型。该模型计及了换流阀电压降和有功损耗，以及换流变压器的无功损耗，模型精度满足工程要求。然后采用罚内点法求解该最优潮流模型。所采用的算法对约束进行松弛，通过引入惩罚项以及松弛因子对修正方程进行调整，提高了算法的鲁棒性。最后通过2000节点、6000节点、8000节点、以及13000节点实际系统算例验证算法的有效性。所有算例的计算结果均通过BPA 软件进行互操作验证，证明了模型与算法的正确性。“,”ABSTRACT:This paper presented a precise optimal power flow (OPF) model and a robust interior point method for large-scale power systems with high voltage direct current transmission (HVDC) interconnection. The OPF model included the quasi-steady-state model of HVDC system. Hence the voltage drop, the loss on the converter valves and the converter transformers were accounted for meeting with the precision requirement. The penalty interior point method was used to solve this OPF model. This method is more robust than primal-dual interior point method and its step-controlled variants owing to the appropriate regulation by penalty terms. Case studies with realistic large-scale power system data, ranging from 2000 buses to 13000 buses, were used to demonstrate the robustness and effectiveness of the proposed algorithm. The precision of the proposed OPF model is validated by commercial power flow software.