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PSCAD新主库模型(EMTDC):
MMC模型库
相域同步电机
单相感应电动机
Z域(离散化)控件
单相5-12多绕组变压器
3/5-柱,对偶概念变压器
迟滞电抗器
TRV包络发电机
谐波信号发生器
Pick-Up和Drop-Out 定时器
Clark及反Clark 变换
变化检测器
死区控制器
刻度变换器
离散化
复共轭
电气相分接
An EMTDC simulation begins at a specified start time and finishes at a specified end time. Between these two times, the program performs the same sequential process iteratively, each iteration incrementing the time by a specified interval. This interval is referred to as a time step, which remains constant (i.e. fixed) during the course of the simulation.
As illustrated by Figure 2-1, the core solution process begins and ends with the system dynamics. First, variables are initialized and stored in BEGIN. Dynamic functions are performed in DSDYN, which includes the preparation of electric network devices such as sources, etc., as well as the manipulation of control signals. The electric network is solved and the resulting measured quantities are considered, along with any post-solution processing requirements, in DSOUT, before the time step is incremented.
Of course, the complete EMTDC solution sequence is more involved than that shown in Figure 2-1. There are several other features present that ensure solution accuracy and speed; all of which are discussed in the following sections. A more complete program process is illustrated in Figure 2-2.
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.
Background
When digital programs were first developed for power system analysis, the computers available were the old mainframe type used by the company for their accounts and billing. A team of specialists, whose function was to oversee all transactions involving the system, also serviced the system. The technical user was but a slave to the whims of these specialists, whose power lay in their ability to speak the system language: The interpretation of a mysterious jumble of words known only as 'JCL' was a jealously guarded secret. Consequently, the 'end user' (or more humiliatingly the 'client') was kept in hand and normally suffered through the computer programs so condescendingly provided.
These computer programs were supposedly structured to anticipate, as the programmers hoped, the every need of the technical user. Model construction and variation was accomplished by data entry. Unfortunately, it was impossible to anticipate all needs. Developments in power system technologies out-sped advancements in the computer programs. Because of these limitations in program flexibility, the programs always lagged in representation of the emerging power system. The creative potential of the technical specialist could not be fully realized with such program modeling restrictions.
2020年,北京天演融智软件有限公司申请高等教育司产学合作协同育人项目,“大数据”和“机器学习”师资培训项目,以及基于OBE的教考分离改革与教学评测项目已获得批准。我们将会跟更多的高校合作,产学融合协同育人。科学软件网专注提供正版软件,跟上百家软件开发商有紧密合作,价格优惠,的和培训服务。您购买PSCAD V5软件后,我们会提供大量额外的附加服务,比如PSCAD软件培训,用户大会等服务。