基于系统可靠性的主动配电网置信容量评估

Credible Capacity Evaluation of Active Distribution Network Based on System Ｒeliability

摘要:

评估主动配电网的置信容量，可以充分利用新能源，为主动配电网的优化配置提供有效参考。以新增电源的 有效载荷能力表征主动配电网的置信容量，建立基于等可靠性指标的评估模型。在蒙特卡洛仿真基础上，考虑网络 中线路的故障情况，对各时刻网络分类计算。采用基于负荷相对增长比例的方法计算负荷调整步长，最后利用中点 分割迭代法求解。IEEE 33 节点系统的仿真计算验证了所提方法的可行性和有效性。仿真时改变分布式电源参数和 可靠性指标，发现风机额定功率对置信容量的结算结果影响较大。

Abstract:

Credible capacity evaluation of active distribution network ( ADN) can make full use of distributed generations ( DGs) ，which provides valid reference for the optimal allocation of ADN． The credible capacity of ADN is defined as the payload capacity of DGs，and the evaluation model is established based on reliability indexes． Different situation with considering the fault of lines are classified and calculated on the basis of Monte Carlo simulation． The load adjustment steps are calculated by the method which is based on relative growth of loads． Finally，the credible capacity of ADN is calculated using the midpoint segmentation iteration method． The feasibility and validity of the proposed method are verified in IEEE 33 nodes system． In the simulation it can find that the rated power of wind powers has a greater influence on the calculation results of credible capacity when DGs parameters and reliability indexes are changed．