基于功率缺额和可用容量的可靠性优化分析模型

针对现有可靠性优化模型对网络拓扑结构和支路容量约束考虑的不足，在网流模型的基础上，采用交流潮流方程描述支路电气参数，可对系统运行中出现的电压越限状态进行校正，并考虑随机故障对系统可靠性的影响，引入可用传输容量概念，对支路传输容量及发电机容量约束进行修正，建立了以功率缺额最小为目标的可靠性优化分析模型。该模型充分考虑了电力系统可靠性与电网结构、设备停运率、设备修复率、负荷水平等因素的密切联系，反映了系统的实际运行状况。通过算例验证了该模型的有效性。

Reliability Optimization Model Based on the Power Vacancy and Available Transfer Capacity

For the capacity constraints of branches and the power grid structure rarely considered by the existing reliability optimization models, this paper establishes a reliability optimization model based on the network-flow models. The AC power flow equations are used to describe the electrical parameters of branches, which can make the system operate within a specified voltage range, and the random failure of the system is taken into account. The paper introduces the available transmission capacity which corrects the slip road transport capacity, and the available generator capacity constraints. The power minimum gap is used as the objective function. The model fully takes into account the close connection reliability of power system and power structure, equipment outage rate, equipment repair rate, load level and other factors, and reflects actual operating conditions of the system. An example is used to demonstrate the validity of the model.