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Preparation and testing time is reduced due to the PSCAD Graphical User Interface.
In EMTDC, many series and parallel electric elements are mathematically collapsed (such as an RLC branch) to reduce the amount of nodes and branches.
The Optimal Ordering algorithm in EMTDC serves to increase LDU matrix decomposition speed.
The Optimal Switch Ordering algorithm ensures that switching operations are very fast and efficient by moving switching elements to optimal conductance matrix positions.
EMTDC utilizes subsystems, which takes advantage of the fact that the numerical solution of electric networks, separated by travelling wave transmission lines, are mathematically independent.
An Interpolation algorithm is used in EMTDC to perform switching operations. This allows any switching event to occur at the exact switching instant, even if this instant is between time steps. This allows EMTDC to run at a larger time step (faster), yet maintain accurate results. Also, additional snubber circuits are not needed to address inherent numerical troubles.
Component source is inserted in either DSDYN or DSOUT, depending on what the component is connected to. Decisions are made by an involved internal algorithm in PSCAD, which ensures that both feedback and feed-forward **s are properly sequenced, minimizing time delays. However, component source may also be forced into either DSDYN or DSOUT at the user’s discretion. To force source into a specific subroutine, use either the DSDYN or DSOUT segments. To utilize the internal algorithm, use the Fortran segment. For more details on these segments, see the section called Segment Types in the Component Design chapter of the PSCAD Manual.
Example on Time Delays and Code Placement
As mentioned above, it is important to establish the proper use of DSDYN and DSOUT to avoid unnecessary time step delays. Meters used for the measurement of voltage and currents for example, are primarily defined in DSOUT: This is the logical subroutine to choose, as DSOUT will supply the measured quantities directly following the network solution. However, measured quantities are often used as inputs to control systems, where the individual control components are defined in DSDYN. Since there is a time step increment between DSOUT and DSDYN, the control system may be basing outputs on quantities defined in the previous time step.
智能粘贴:复制对象时,所有可能的信息都会包含在剪贴板中,以便根据上下文决定如何好地粘贴对象。还很*粘贴到外部程序,层支持,源名称,多选复制传输。
元件图形编辑器更新:包括更新的图形调色板;对文本元件的字体支持;新的可调形状。
便签支持多种语言(Unicode):用户可以在便签中使用任何已知的字母(例如西里尔字母、汉字等)。
复数类型信号:完全支持复数类型的控制信号(包括对电线、端口、导入/导出标签、无线电链接的支持)。
PSCAD/EMTDC软件开发团队已经对PSCAD的结构和功能进行了重大的改进,包括用户高度要求的功能。PSCAD X4代表了对软件内部架构的彻底更新。随着新架构的出现,许多新的特性和功能都是以前版本不可能实现的。
以下功能只在PSCAD X4和后续版本中找到。
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