摘要
为考虑不同的负荷—发电增长方向对电力系统暂态稳定负荷裕度的影响,提出了计算电力系统暂态稳定最小负荷裕度的最优化模型。该模型使用改进PEBS法提供的暂态稳定量化指标构成稳定约束条件,具有与暂态时域仿真相同的模型适应性。根据点到曲面最短距离的基本定理,给出了求解所提出最优化模型的数值方法。该方法的基本思想是以暂态稳定临界点处暂态稳定边界曲面的法向量作为求解迭代过程中的负荷—发电增长方向,反复迭代求出暂态稳定最小负荷裕度。理论上,该模型不但可以计算各种发电—负荷增长方向上的暂态稳定最小负荷裕度,也可用于计算暂态稳定最大负荷裕度。所提出的计算电力系统暂态稳定最小负荷裕度的最优化模型及其求解方法可以考虑各种系统运行参数的约束。数值算例验证了所提出的模型及求解方法。
In order to consider the effect of different load-generation increasing directions to the load margin constrained by power system transient stability,an optimization model for calculating the minimal load margin constrained by power system transient stability is proposed. The stability quantitative index proposed by the improved PEBS method is used to construct the transient stability constraint,and it has the same model adaptation as the time domain transient simulation method. A numerical method for solving the proposed optimization model is given out based on the basic theorem about the distance from a point to a curved surface. The basic idea of the proposed solution method is that the normal vector at the critical point of the power systems transient stability boundary surface is taken as the load-generation increasing direction in the iterative solution procedure,and the minimal load margin constrained by power systems transient stability is finally acquired. Theoretically,the proposed model and method can also be applied to calculating the maximal load margin constrained by power system transient stability,and all kinds of power system operating constraints can also be considered. A numerical example verifies the proposed model and method.
出处
《电工电能新技术》
CSCD
北大核心
2014年第6期47-51,共5页
Advanced Technology of Electrical Engineering and Energy
基金
国家高技术研究发展计划(863计划)研究资助项目(2011AA05A118)
关键词
暂态稳定
负荷裕度
电力系统
transient stability
load margin
power systems
