PSCAD/EMTDC自定义建模及在直流线路保护仿真中的应用  

The user-defined model of PSCAD/EMTDC and its application in simulation of HVDC transmission line protection

作　　者：刘永浩[1] 蔡泽祥[1] 李爱民[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《电力系统保护与控制》2011年第9期119-124,共6页Power System Protection and Control

摘　　要：PSCAD/EMTDC自定义建模功能为建立精确、详细的继电保护模型提供了解决思路。对比分析了自定义元件的实现途径、三种开发语言的运行效率以及自定义元件与Module的差异性,指出基于Matlab的实现方式作为过渡方案可用于研究及评估保护新算法,而算法成熟后应转化为Fortran或C语言方式以提高运行效率。揭示了使用C语言静态变量而导致的自定义元件内存调用冲突问题的机理,提出了采用公用数组实现内存管理的解决方法。以某实际直流输电工程的线路行波保护为原型,应用自定义建模技术搭建了其详细的仿真模型,仿真结果验证了该方法的可行性与有效性。The application of user-defined model in PSCAD/EMTDC provides a solving approach to establish accurate and detailed relay protection models.In this paper,the realization approaches of user-defined model, the operating efficiency of three developing languages and the difference between user-defined model and Module are compared and analyzed. Matlab-based realization mode is recommended as an intermediate one with which new protection algorithms can be studied and evaluated,after an approach is selected,models should be written by Fortran or C language in order to increase the operating efficiency.Memory transfer conflict of user-defined model due to the use of static variable of C language is revealed,and it gives the solution which adopts the common arrays to manage the memory.Based on an actual HVDC transmission traveling wave protection system,a detailed simulation model adopting the user-defined modeling technique is established and simulation result proves the feasibility and validity of the proposed technique.

关 键 词：PSCAD/EMTDC 自定义元件 运行效率 内存调用冲突 直流线路保护 

分 类 号：TM743[电气工程—电力系统及自动化]