【摘要】 快速切除负荷是电力系统在故障后保持稳定的一种常用措施。作者以工程上普遍采用的发电机组最大相对摇摆角小于某一给定值为暂态稳定约束函数,然后基于数值积分法给出了暂态稳定约束函数相对于切负荷控制量的灵敏度计算公式,并在此基础上提出一种新的切负荷算法。由于求解1次所有控制量灵敏度的计算量只相当于计算2次暂态稳定,该算法能快速地计算出使系统保持稳定的切负荷量。此外,该算法还具有原理简单、不存在收敛性问题、控制效果好等特点。更多还原

【Abstract】 Load shedding is a frequently used method in maintaining the transient stability of power system. In this paper, the relative maximum swing angle among the machines is taken as transient stability constraint function as widely used. Then the formula of sensitivity calculation of transient stability constraint function relative to the amount of load shedding is derived by means of numerical integration. On this basis a new load shedding algorithm is put forward. Because the amount of computation to find for once the solution of all the sensitivities is about twice that for transient stability, so the presented algorithm is considered to be fast for calculating the load to be shed to maintain the system stability. Besides, the principle of the presented algorithm is simple, it has good convergence and high control efficiency.更多还原