区间负荷下的输电网灵活规划方法

建立了区间负荷下的输电网灵活规划模型,该模型考虑负荷的不确定因素,以投资成本最小为目标,以正常情况和线路N-1情况下的网络安全为约束,求解该模型得到区间负荷下满足正常情况和线路N-1情况下系统安全的输电网规划方案。根据区间至多切负荷量的数值来判别区间负荷下电网规划方案的安全性和安全程度,使用改进的贪婪随机自适应搜索算法快速求解该模型。6节点系统和某实际77节点系统的规划结果验证了该方法的正确性和有效性。

A Flexible Planning Model of Transmission Network Under Interval Load

Considering load uncertainty in power network expansion planning,taking minimum cost investment as objective function and the security of transmission network under both normal and N–1 conditions as constraints,an flexible planning model for transmission network under interval load is built,a transmission network flexible planning under interval load,which can meet the requirement of system security under both normal and N–1 conditions,is achieved by solving the proposed model.During the solving process,the upper limit of interval numbers of minimum load shedding are calculated to judge both security and security degree of transmission network planning scheme under interval load,and utilizing improved greedy randomized adaptive search procedure algorithm(GRASP) the solution of the proposed model is speeded up.The correctness and effectiveness of the proposed model are verified by planning results of a 6-bus system and a practical 77-bus system.