主修课程： C程序设计，数字电子学，模拟电子学，单片机接口技术，PLC控制系统。

Majoring Courses: C Program Language, Digital Electronics, Analog Electronics, MCU Interface Technology, PLC Control System.

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分析了PSCAD/EMTDC的软件结构，提出了基于PSCAD/EMTDC和C语言接口技术的自定义模型的实现方法，用C语言构建了以实际保护装置为原型的数字式距离保护模型。

The program structure of PSCAD/EMTDC is analyzed, and the method of realizing the user-defined model which is based on the interface technique between PSCAD/EMTDC program and C language is presented.

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系统使用并在本文中介绍的关键技术还有PCI接口技术、自动增益控制技术、数字逻辑的CPLD实现技术等。

In the paper has been described that crucial technologies have PCI interface, automatic gain control, CPLD implementing of digital logic and so on.

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