基于负荷裕度最大化的发电出力优化 (一)优化模型的提出

Generation Dispatch Optimization for Maximizing Loading Margin Part One Presentation of the Optimization Model

发电机有功出力方式优化是提高系统传输能力的主要控制手段。文中推导了负荷裕度最大点处有功出力方式的最优性条件,进而提出一种有功出力优化新模型。该模型将一个优化问题转换成一个非线性方程组的求解问题,为发电机有功出力优化在电压稳定中的应用奠定了一定的理论基础。通过构造极限曲面法向量与有功出力方式的灵敏度关系,并对参考点进行精心选择,准确地确定了最佳的发电机出力修正方向。

Generation rescheduling is one of the main control approaches for improving transfer limit of a power system.In this paper,optimal condition of a generation pattern on maximum loading margin is derived.A new model for the maximum loading margin is presented according to this optimal condition,by which the optimization problem is transformed into a problem of solving a set of non-linear equations.The proposed model provides a certain foundation on the application of generation optimization on voltage stability. At last, the optimal correction direction for generation pattern is acquired accurately by building sensitivity matrix of normal vector respect to a generation pattern and selecting reference point carefully.