市场环境下考虑暂态稳定约束的最优潮流计算

为保证电力系统的安全性，在电力市场优化运行方案中，考虑暂态稳定约束是十分必要的．为此，首先用排队法确定机组组合，等报价法确定各个发电机组有功功率，然后进行暂态稳定分析，求出各个不稳定故障修正的暂态能量裕度，再根据暂态能量裕度的大小找出最严重的不稳定故障，最后对最严重的失稳故障下领先、落后机组的输出功率分别进行调整，领先机组按照灵敏度修正，落后机组按处在同一报价水平的原则来修正，从而达到满足暂态稳定约束且购电费用增量最小．此外，进一步通过IEEE-30节点系统分析计算，验证了所提算法的正确性和有效性．

Computation of Optimal Power Flow Considering the Constraint of Transient Stability in Market Environment

To ensure the safety of the electric power system,it is very necessary to consider the constraint of transient stability in the optimal electric power market circulating project.Firstly the merit-order method is used to determine generator combination,and the equal bidding price method is used to determine the active power of every generator.Then transient stability is analyzed to calculate the corrected transient energy margin of each instability fault.And based on the transient energy margin,the most serious unsteady fault is found out.Final- ly,the leading and lagging generators' output power of the most serious unsteady fault are regulated respectively. The leading and lagging generators are modified according to the sensitivity and the same bidding price principle respectively.Consequently the results satisfy the constraint of transient stability and the minimum increment of power purchase cost.Furthermore the correctness and validity of the proposed method is verified through IEEE- 30 system.