摘要
为缓解电网可靠性评估计算的复杂性,以分区功率支援为纽带,提出了基于功率支援分区协调优化的电网可靠性评估模型。该模型按发电裕度大小确定子区域的协调求解顺序,将子区域间的联络线功率看作子区域边界节点上的等效负载,按协调求解顺序采用最优负荷削减模型,逐次优化各子区域的负荷削减量和对外功率支援能力。相比于常规电网可靠性评估的分区等值技术,分区协调优化模型由于考虑了各子区域的发电裕度和潮流约束关系,并且采用优化模型计算子区域最大等效负载,因而可实现子区域间功率支援能力的有效建模。在保证较高精度的前提下,提高了电网可靠性评估效率。通过IEEE-RTS96测试系统验证了模型的快速性和有效性。
To alleviate the calculation complexity of power system reliability evaluation,this paper proposes a reliability evaluation model for power system based on network partition and coordination optimization of power support capability.This model determines the coordination solution sequence of subareas according to the generation margin,takes the tie line power between subareas as equivalent loads at the boundary nodes of subareas,and adopts the optimal load shedding model to optimize the load curtailment and power support capabilities of subareas successively according to the coordination solution sequence. Compared with the conventional partition equivalence technique of power system reliability evaluation,the proposed network partition and coordination model can realize the effective modeling of the power support capabilities among subareas,and enhance the reliability evaluation efficiency of power system while guaranteeing high accuracy,due to considering the generation margin and power flow constraints of subareas and adopting the optimization model to calculate the maximum equivalent load of subareas. Finally,this paper verifies the rapidity and effectiveness of the proposed model through IEEE-RTS96 test system.
出处
《电力建设》
北大核心
2016年第10期69-79,共11页
Electric Power Construction
基金
国家自然科学基金项目(50977094)~~
关键词
电网可靠性
等效负载
发电裕度
分区协调
power system reliability
equivalent load
generation margin
network partition and coordination
