动态连续潮流与改进捕鱼算法结合计算静态电压稳定裕度

目标函数为系统的最大静态电压稳定裕度。针对经典连续潮流法在不平衡功率分配原则上存在的不足,提出将两种适用于动态潮流分析的方法与连续潮流法结合,建立动态连续潮流模型,即根据有调节能力的发电机转子转动惯量与节点的工频静特性系数按比例分担由于负荷水平增加而产生的有功功率不平衡量;引入罚函数法解决状态变量越限问题;为寻求控制变量的最优组合,解决优化过程易陷入局部最优的问题,引入基于模拟渔夫捕鱼的智能算法及其改进算法。通过IEEE6,IEEE30标准节点系统进行计算和仿真。算例验证了模型的有效性。

Calculation of static voltage stability margin based on dynamic continuation power flow and improved optimization algorithm on simulating the fisher'fishing

To solve the deficiencies existed in principle of the continuation power flow method about allocating amount of active power imbalance,the two main methods for dynamic continuation power flow are introduced to the classic continuation power flow method,to establish the model of dynamic continuation power flow,that is to say,the amount of active power imbalance is shared by the coefficient of power frequency static characteristics and rotary inertia of generator.The introduction of penalty function method is to solve the out-of-limited problem of state variables,and introduction of improved optimization algorithm on simulating the fisher'fishing is to seek the optimal combination of control variables and to solve the local optimum in the optimization process.Finally,cases study demonstrated the validity and superiority of the proposed method and the integrated model through the standard node system of IEEE6 and IEEE30.