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System Dynamics
The system dynamics is an essential part of the EMTDC solution process. It serves to encompass the electric network, providing the ability to interface with it on either side: Data may be controlled from one side, while extracted from the other.
Essentially a Fortran program in its own right, the system dynamics is built according to customizable specifications. These specifications are normally provided through PSCAD, in the form of components and modules. Components and modules are graphical representations of how the final program is to be structured, where each module, including the main page, is represented by a unique Fortran file. This file consists of declarations for a DSDYN subroutine, a DSOUT subroutine, and two BEGIN subroutines. Components always exist within modules, so as such they represent inline code that combines to define the contents of each subroutine.
Of course, some components are electrical in nature and hence provide information for the construction of the electric network as well. This information is collected and inserted into a Data file, where each module in a project possesses its own unique Data file. Data files are discussed in more detail later on in the section entitled Electric Network Solution.
撤消/重做功能扩展：撤消/重做功能已扩展，包括参数网格、元件定义图形编辑器、工作空间中原理图定义分支。
项目导航功能增强：包括导航栏、书签、**链接和项目链接元件。
改进的宏功能：完整的宏支持已添加到便签和合并器。添加了几个新的宏。
更新了搜索功能：添加了正则表达式搜索（RegEx），允许完全自定义的搜索。
增加了方向键的功能：在选择文本时包括轻推、遍历工作区树、Shift和Ctrl键功能。
改进了图形快速显示功能：图形的飞边窗口现在包含了更多的信息。
改进了表参数：表参数功能已被彻底检查。
修复状态栏：状态栏已被彻底检查。
沙特电力公司(SEC) 将全国四个不同的地区合并
为全国的一个公司。该系统的关键是一个380KV的交
流互联网络。终的目标是通过一个单的统一控制
中心来控制整个系统。为了协助SEC统一他们的电力
网络，我们参与了一些不同的关键项目。除了工程研
究，六名以上的工程驻扎在沙特阿拉伯的不同地
区，在业务，政策和程序方面提供的。
工程研究支持终的目标包括以下方面（使用PSS/E
和PSCAD）：
研究定义操作指南
● 黑启动程序-研究发展新的黑启动程序
● 区域互连研究，包括负载流，稳定性和电压控制
● 联络线传输限制
● 失步继电器设计
● TOV和开关的研究，网络共振研究
Insulation coordination of transformers, breakers and arrestors
Impulse testing of transformers
Sub-synchronous resonance (SSR) studies of networks with machines, transmission lines and HVDC systems
Evaluation of filter design
Harmonic analysis including resonance
Control system design and coordination of FACTS and HVDC; including STATCOM, VSC, etc.
Variable speed drives of various types, including cycloconverters and transportation and ship drives.
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