基于动态潮流模型的最小发电费用增量计算

摘要

传统最小发电费用增量计算模型将系统单位需求变化固定在单个平衡节点,所得计算结果作为系统调度运行的参考存在较大的偏差。为此,在动态潮流模型的基础上,根据分散松弛因子和总有功不平衡量之间的关系,建立了考虑多平衡节点的最小发电费用增量计算模型。针对转置雅克比矩阵法(transpose Jacobian method, TJM)求解此模型存在大系统无法收敛的问题,提出一种求解方案,分别采用内点法和 TJM 处理该模型的不等式和等式约束。最后,通过对多个算例进行数值仿真,验证了该模型和算法的有效性与正确性。%Traditional calculation model for minimum increment of generation cost fixes unit demand change of the system on one single balanced node and there is a big deviation in acquired result which is regarded as reference for system dispatching operation. Therefore,on the basis of dynamic flow model and according to relationship between scattered relaxation factor and unbalance of total active power,this paper introduces establishment of calculation model for minimum increment of gen-eration cost considering of multi-balance nodes. In allusion to the problem of large system being unable to converge by using transpose Jacobian method (TJM)for solving,a kind of solution scheme is proposed,which uses interior point method (IPM)and TJM to deal with inequality constraint and equality constraint of this model. Finally,numerical simulation on multiple examples verifies effectiveness and veracity of this model and algorithm.