基于信赖域法的城市电网供电能力充裕度评估  

Assessment of Urban Power Network Power Supply Capability by Trust Region Method

作　　者：李红军[1] 李敬如[1] 杨卫红[1] 

机构地区：[1]国网北京经济技术研究院,北京市宣武区100761

出　　处：《电网技术》2010年第8期92-96,共5页Power System Technology

摘　　要：信赖域算法具备局部超线性收敛和总体理想收敛的特点,基于信赖域法提出了城市电网供电能力充裕度的评估方法,该方法以网络最大供电能力为目标函数,以发电容量、线路热稳定、变压器容量、母线电压为基本约束条件,求解过程中结合交流潮流算法精确计算节点电压。网络最大供电能力确定后,其与电网目前最大负荷水平的比值即为电网供电能力充裕度。算例结果验证了该方法的有效性。Based on trust region algorithm that possesses the feature of local superlinear convergence and global ideal convergence, an approach to assess power supply capability of urban power network is proposed. In the proposed approach, the maximum power supply capacity of urban network is taken as objective function and the generation capacity, thermal stability of transmission line, transformer capacity and busbar voltage as basic constraints, then combining with AC power flow calculation the nodal voltages are accurately calculated. After the determination of maximum power supply capacity of urban network, the ratio of this capability to current maximum load is the very power supply capability of urban power network. Results of calculation example show that the proposed method is effective.

关 键 词：城市电网 供电能力充裕度 信赖域法 交流潮流 算法 

分 类 号：TM711[电气工程—电力系统及自动化]