考虑发电机约束条件的潮流计算方法

Load Flow Calculation With Limits of Generator

由于当发电机满足励磁电流限制时，并不能保证发电机定子电流不越限，当发电机满足定子电流限制时，也不能保证发电机励磁电流不越限，因此，本文将受发电机定子和转子电流约束下的节点定义为ＰＩｓｒ节点，同时，基于凸极式同步发电机定子电流和转子电流约束方程组，采用牛顿法分别推导了极坐标和直角坐标系统下的功率偏差型潮流方程，并给出了ＰＩｓｒ节点的潮流雅可比矩阵元素修正公式。当考虑了定子电流和转子电流约束条件后，潮流计算的计算量与考虑无功约束条件时的计算量相比增加不多．

When excitation limit of generator is satisfied it is hard to guarantee that stator current not to exceed its limit, when stator current limit of generator is satisfied it is also hard to guarantee that excitation current not to exceed its limit. The PIsr node in load flow is defined for generator with maximum excitation limit and maximum stator current limit in this paper. Based on stator current limit and rotor current limit equations of salient pole generator, the power deviation equations of load flow in polar coordinate and rectangular coordination are deduced by Newton's method, the correct formulas of Jacobian matrix elements are given too. The calculation time of this load flow method with maximum stator current limit and rotor current limit is increased not too much compared with that method with reactive power limit.