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中文摘要：
统一潮流控制器能够快速、灵活地改变线路的电气量,从而改善电力系统的稳定性、可靠性和经济性,但是该装置的引入给电力系统潮流计算和优化调度分析增加了难度。直流最优潮流模型的提出,简化了大系统分析的复杂性,因其计算速度快而具有较好的实时性,但计算结果精度低,且缺失节点电压幅值和线路无功功率2个重要电气量。为此,建立了一种新型的线性化最优潮流模型,并提出了线性化的统一潮流控制器嵌入式稳态模型,然后在热启动环境下使用简化原-对偶内点法对含统一潮流控制器的线性化最优潮流模型进行求解。对江苏南京78节点等值系统的实际数据进行测试,结果表明所建模型保留了线性化模型的高效性,计算结果具有较高的精度,且能够求解出比直流最优潮流模型更加完备的潮流信息。
英文摘要：
Even though unified power flow controller（UPFC） can quickly and flexibly change electrical variables, thus ameliorating stability, reliability and economical efficiency of power system, its introduction increases difficulties in power flow calculation and optimal dispatch analysis. DC optimal power flow（DCOPF） model with good real-time performance on account of its fast computation speed greatly simplifies complexity of system analysis. However, its calculation accuracy is inadequate and two important electrical variables, i.e. node voltage amplitude and line reactive power, are missing. In this paper, a new linear optimal power flow model is established, presenting a UPFC linearization technique. This model containing UPFC could help to solve optimization problems based on hot-start environment by using simplified primal-dual interior point method. The model in this paper retains efficiency of the linearized model on basis of real example simulation results of Nanjing 78-bus equivalent system. Its calculation accuracy is higher than those of DCOPF and can work out more complete power flow information than DCOPF model does.
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