基于自适应拓扑建模的船用电网短路计算方法

为提高舰船电力系统短路计算的效率、准确性,适应现代舰船规模日趋庞大,结构易变等复杂环境,提出一种基于自适应拓扑建模的短路计算新方法。利用船用电网辐射结构特点,对网络进行二次辐射建模,并针对此模型制定了电源等效次序算法,而后基于戴维南等效定律,将网络中的电源路径按照电源等效次序逐级合并,最后得到网络对于短路点的戴维南等效电路,从而获得短路电流。该算法可对主要异步电机反充负荷进行量化计算,并能应付多电源、多重故障、不对称故障短路等复杂情况。性能分析和算例分析表明:该算法高效、准确,并能适应多种复杂环境。

Short Circuit Calculation Algorithm Based on the Adaptive Topology Modeling for Marine Electrical Power Systems

To improve the efficiency and precision of short-circuit calculation in marine electrical power systems,and to deal with the possible difficulties introduced by the many nodes and variable structures of modern vessels,this paper presented an innovative short-circuit calculation algorithm on the basis of adap tive topology modeling.By examining the structural characteristics of modern marine electrical power sys tems,the electric power supply and its equivalent electric power supply were first combined according to the Thevenin’s Theorem.Then,the Thevenin’s circuit was obtained,and the short-circuit current at the fault point could be easily calculated.This algorithm can be applied to the quantization calculation of main asynchronous reversal-charging loads,and to cope with complications such as multiple power supplies,multiple short circuit faults and unsymmetrical short circuits.The performance analysis of the algorithm val idates its efficiency and accuracy under various marine conditions.