基于分段均匀介质模型的非均匀链式电网扰动传播机理

发布时间：2018-12-26 11:52

【摘要】：揭示扰动传播机理对于提高互联大电网安全水平具有重要作用。机电波理论尝试借助波动力学研究电网机电暂态过程,为研究电网扰动传播开辟了新思路。针对非均匀链式电网的扰动传播问题,提出一种分段均匀介质建模方法。在分析电网与机械波传播介质相似形性的基础上,提出发电机惯量作用域用以确定空间集中式发电机参数的均匀化范围。进一步,导出基于分段均匀介质模型的机电波方程及其解析解,并利用状态传递矩阵证明分段均匀介质模型与电网实际模型的等价性。最后,通过幅值传递矩阵获得解析解系数与分段介质参数的关系。仿真结果验证了所提模型及算法的正确性。
[Abstract]:Revealing the mechanism of disturbance propagation plays an important role in improving the security level of interconnected large power grid. The theory of electromechanical wave attempts to study the electromechanical transient process of power grid by means of wave mechanics, which opens up a new idea for studying the transmission of power grid disturbance. A piecewise uniform medium modeling method is proposed to solve the problem of disturbance propagation in non-uniform chain power systems. On the basis of analyzing the similarity between power grid and mechanical wave propagation medium, the inertia domain of generator is proposed to determine the uniform range of the parameters of spatial centralized generator. Furthermore, the electromechanical wave equation based on the piecewise uniform medium model and its analytical solution are derived, and the equivalence between the piecewise uniform medium model and the actual power network model is proved by using the state transfer matrix. Finally, the relationship between the analytic solution coefficient and the piecewise medium parameters is obtained by means of the amplitude transfer matrix. Simulation results verify the correctness of the proposed model and algorithm.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【基金】：国家重点基础研究发展计划项目(973项目)(2012CB215206) 国家自然科学基金项目(51222703) 高等学校博士学科点专项科研基金(20120036110009)~~
【分类号】：TM712

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