【摘要】 为兼顾输电规划的经济性与可靠性,建立了计及静态安全风险的输电网短期有功和无功综合扩展规划的数学模型,模型中将线路与无功补偿设备投资的年值费用、年运行费用及年风险费用总和作为目标函数,计及了预想事故发生的概率和交流潮流约束。为了基于交流潮流模型进行静态安全风险评估,提出了一种基于有功静态安全域和电压灵敏度循环迭代的2阶段削负荷方法。首先确定最优校正性控制下的负荷削减量,进而用损失电量的社会产值来衡量风险费用。为应对模型求解计算上的复杂性,给出了一个2阶段寻优算法,该法不仅降低了原问题的求解难度,而且最终可获得若干数目的满意解,辅助规划人员决策。通过巴西南部46节点系统算例验证了模型的合理性和算法的有效性。更多还原

【Abstract】 In order to take into account both the investment and reliability in transmission expansion planning,a mathematical model for the short term integrated expansion planning of real and reactive power for transmission network considering static security risk is formulated.The sum of the lines cost,reactive power compensation,operation cost and risk cost are considered as an objective function.The probability of contingency and AC power flow constraint are included in the model.For the purpose of achieving static security risk assessment based on the AC model,a two-stage approach for load curtailment based on active power steady-state security region and voltage sensitivity iteration is proposed.Firstly,the amount of load curtailment is determined by implementing optimal remedial control measures.Secondly,the risk cost could be measured by the social production value of the load loss.To cope with the computing complexity when solving the model presented,a two-step optimization algorithm is provided,through which not only is the difficulty of the problem significantly reduced,but also some satisfactory solutions can be identified to support planners in decision-making.The simulation results obtained for SBS 46-bus system demonstrate the soundness of the model and the effectiveness of the algorithm.更多还原