【摘要】 现代复杂交直流电网的发展对电力系统的建模技术提出了更高的要求,模型应表现出大规模系统的动态特性,又可对系统的重要元件进行精确分析。为此,文中提出了用于交直流系统的双时标混合协调仿真算法。综合机电暂态和电磁暂态分析方法的优点,在空间上针对复杂交直流系统分析的特点对系统模型进行合理分割,子系统之间采用双向反馈数据接口。利用多速计算、虚拟支路等技术,应用于通用的仿真软件平台上。文中采用双时标混合协调仿真法对南方电网的实际工程数据进行了分析和计算,仿真中可以体现大系统内的晶闸管等非线性元件的特性。试验结果表明了该仿真手段的可行性和有效性。更多还原

【Abstract】 With the development of nowadays complex AC/DC system calling for even more advanced modeling technique for power system, the modeling should represent as more dynamic characteristics as required of the bulk power system and analyze system’s key elements accurately. Therefore, a hybrid simulation algorithm of dual-time scale applied to AC/DC system is proposed in this paper. It integrates advantages of both electromagnetic transient and electromechanical transient simulations, partitions the system’s model in terms of the analysis of the complicated AC/DC system spatially and reasonably, and adopts the bidirectional interface of feedback data between subsystems. This model is then applied to the current platform of simulation software with the adoption of techniques such as multi-rate calculation, virtual branch technique and so on. Moreover, the practical engineering data of the South China Power Grid are analyzed by using the proposed algorithm. The simulation embodies the characteristics of nonlinear elements such as thyristors of the bulk system whilst the results verify the feasibility and effectiveness of the proposed algorithm.更多还原