大规模交直流电力系统电磁暂态仿真高效建模方法

发布时间：2018-09-10 21:22

【摘要】：为克服机电暂态仿真无法描述交直流混合电力系统非基波或不对称特性的局限性,急需高效的大规模电力系统电磁暂态建模方法。针对实际高压直流输电换流站主接线方式,文章首先简化了阀组模型并说明了对应简化模型的输电线路模型,大大减少了模拟换流站而利用的计算资源;其后介绍了适用于基于文本转换的电磁暂态快速建模技术的模型定义方法,该模型充分利用了矩阵计算,易于初始化且提高了计算速度。以一个两区四机系统验证了采用所提简化直流模型的精确性与自定义模型的有效性,以南方电网主网等值系统为例说明了大电网电磁暂态建模的步骤,并提出了提高机电暂态仿真精度的建议。
[Abstract]:In order to overcome the limitation that electromechanical transient simulation can not describe the non-fundamental or asymmetric characteristics of AC / DC hybrid power systems, an efficient electromagnetic transient modeling method for large-scale power systems is urgently needed. In view of the main connection mode of HVDC converter station, this paper first simplifies the valve group model and explains the transmission line model corresponding to the simplified model, which greatly reduces the computational resources used to simulate the converter station. Then the model definition method suitable for the fast modeling technology of electromagnetic transient based on text conversion is introduced. The model makes full use of matrix calculation, and it is easy to initialize and improve the calculation speed. A two-zone four-machine system is used to verify the accuracy of the proposed simplified DC model and the validity of the self-defined model. Taking the equivalent system of the main network of the Southern Power Grid as an example, the steps of the electromagnetic transient modeling of the large power network are illustrated. Some suggestions for improving the accuracy of electromechanical transient simulation are put forward.
【作者单位】：中国电力工程顾问集团中南电力设计院有限公司;浙江大学电气工程学院;
【基金】：中国电力工程顾问集团有限公司科技项目(DG1-X02-2015)的支持
【分类号】：TM743

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