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EMTDC uses a Chatter Removal algorithm (related to the Interpolation algorithm) to remove these unwanted oscillations.
EMTDC does not restrict how circuit elements can be combined: Users can place any number of switching elements, sources, etc. in series or in parallel.
EMTDC switching devices and sources can be ideal (i.e. 0 resistance) or non-ideal (where the user can enter the on/off resistance values).
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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.
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我们签订的一个项目,协助一个多阶段试点项目
的开发,论证单线接地回路(SWER)高压直流输电
到偏远的北部地区的可行性。在一个新的高压直流输
电系统配电一体化的项目中我们提供支持。*1
和*2阶段已完成,*3阶段的安装目前正在进行中。
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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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