摘要
以终端时刻的最大相对功角作为暂态稳定约束条件,根据最优控制原理,提出了以联立求解动态方程和协状态方程来计算暂态稳定约束对所有控制量梯度的方法,有效提高了计算速度。并以此简化暂态稳定约束,形成了一个精简的基于最优潮流法的TTC模型,并采用逐步二次规划算法来求解此模型。由于显著降低了暂态稳定约束的维数,因此该模型能够适用于较大规模的电力系统,并能有效处理多预想事故。采用IEEE39节点系统对该算法进行了仿真计算,结果表明,在考虑暂态稳定约束的条件下,通过该算法所求得的TTC能够维持系统的稳定性,从而验证了该算法的正确性和有效性。
The maximum relative rotor angle at the end of transient period is chosen as transient stability constraints.Based on optimal control theory,an effective approach ,t o calculate the gradients of transient stability constraints with respect to all control variables, i s proposed by simultaneously computing dynamic equations and co-state equations.According to the proposed approach, t he transient stability constraints are simplified which can improve the calculating efficiency ,a nd a refined OPF-based TTC model is established.Then the SQP（ Sequential Quadratic Programming） algorithm is adopted to solve the TTC problem. S ince the high-dimensional transient stability constraints are simplified dramatically ,t he TTC model is suitable for large scale power systems, meanwhile it can deal with multi-contingency effectively .A t last, an IEEE39-bus system is applied to test the proposed approach .T he results indicate that the transient stability- constrained TTC can maintain system stability ,so that it illustrates the effectiveness and efficiency of the proposed approach.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第19期22-26,32,共6页
Power System Protection and Control
基金
浙江省重大科技项目(2007C11098)
关键词
暂态稳定
最大传输容量
最优潮流
最优控制
逐步二次规划法
transient stability
total transfer capability（TTC）
optimal power flow（OPF）
optimal control
SQP
