考虑暂态稳定约束的可用传输能力计算

Calculation of Available Transfer Capability with Transient Stability Constraint

文章运用隐式梯形积分法将发电机转子运动方程转化为等式约束,将发电机转子相对摇摆角稳定极限转化为不等式约束,从而将含有暂态稳定约束的可用传输能力问题转化为一个非线性规划问题。采用原始-对偶内点法对该模型求解。仿真计算结果表明:考虑暂态稳定约束的ATC可以在满足系统经济性的同时保证系统的安全稳定运行。而原始-对偶内点法完全可以很好地解决由于发电机转子运动方程的引入带来的大量约束问题,具有极好的收敛特性。

Through transforming the motion equations of generator rotors into the equational constraints and transforming the stable limits of the relative rotor angles swinging into the unequational constraints based on the implicit trapezoidal rule, this paper transforms the available transfer capability (ATC) with transient stability constraints into a non-linear programming problem. The authors use the primal-dual interior point method to solve the problem. The simulation experiments on test system have shown that the ATC with transient stability constraints can not only satisfy the economics, but also ensure safe and steady operation. The primal-dual interior point method can solve effectively the problem with a lot of constraints resulting from the motion equations of the generator rotors with the result of perfect convergence.