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The World's Most Advanced Tool for Power Systems EMT Simulations
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EMTDC现在包括一个改进的增强节点分析(MANA)算法。这样就可以实现电压/电流相关的电压/电流源(包含在V5主库中)。此外，还实现了一种新的稀疏解决方案，这在求解较大的子系统时是有益的。如果子系统中的节点数量超过200(默认值)，则自动使用新的解决方案。
Consider the simple circuit in Figure 2-3. A comparator is being used to compare a real constant variable equal to 0.0, with a data signal Ea, which is a measured voltage from a voltmeter. The comparator is adjusted so as to give a high output when Ea becomes greater than 0.0, and a low output otherwise. The comparator dynamics are defined by default in the DSDYN subroutine, whereas the measured voltage signal Ea is defined in DSOUT as an output quantity.
With the above configuration, the comparator output signal will contain a single time step delay. This is due to the fact that the comparator dynamics in DSDYN (i.e. the code that determines its output state) are using a measured voltage Ea, defined in DSOUT. Since the comparator output state is based on the comparator inputs, the output will appear to have been delayed by one time step.
This delay can be removed simply by forcing the comparator dynamics code from DSDYN to DSOUT. This will force the comparator to consider the measured voltage within the same time step, when determining its state.
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