基于拓扑搜索的水电站辅机系统动态仿真建模

Dynamic simulating and modeling of hydropower auxiliary system based on topology searching

应用拓扑搜索技术进行了水电站辅机系统的动态建模,提出了适用于辅机管网系统的拓扑搜索算法,建立了适用于动态计算的管网元件模型,利用拓扑搜索结果合成了便于计算的管网回路,建立相应的管网动态方程,并应用线性化理论将互相耦合的非线性方程化成线性方程迭代求解。该算法快速、适应管网及其元件工况的复杂变化,其计算模型能反映出辅机元件的中间过程,拓扑搜索较好地处理了不通支路,有效避免了管网计算的"死点","死网"问题。其算法和模型已经在某实际水电站的仿真系统中得到应用,验证了算法和模型的有效性。

This paper uses the technology of topology searching to dynamic modeling for hydropower auxiliary system, puts forward the topology searching algorithm applicable to the auxiliary pipe network system, and establishes the pipe network component model suitable for the dynamic calculations, uses the results of topology searching to integrate the pipeline loop appropriate to calculation, and establishes corresponding dynamic equations of the pipe network in the model. A linear theory is applied to convert the mutual coupling non-linear equations into linear equations for solving it iteratively. This algorithm is very efficient and can adapt to the complex changes of pipe network and components working conditions. Its calculation model can reflect the changing processes of the auxiliary components among different states. Topology searching algorithm can deal with the isolating branch well, effectively avoid the problems of isolating nodes and sub-network in the pipe network calculations. Its algorithms and models have been applied in a real large hydropower simulation system, which validates the effectiveness of this algorithms and models.