How to calculate precharging resistors and precharging time for input DC link capacitors and Output AC filter capacitors of an Inverter?

Power system strength is very important for system planning and protection design. There is one metric "SCR or short circuit ratio" generally mentioned to define the system strength. I have confusion about the definition of this index. Some texts define it as the ratio between short-circuit MVA and rated MVA and some define it in reference to the inverter based resources as the ratio between short-circuit MVA and rated MW of inverter based power source. Few references are attached.

Kindly clarify.

To obtain dq components of the inverter voltage for unity power factor correction of a 3 phase induction motor

What is the modulation index (m_a ) which is mentioned in the 2.2 equation?

Hi,

I am working on a model predictive control of inverter using a Microlabbox or DSpace 1102. Recently, I found that working with Microlabbox beyond 2e-5 us is a tough task. I came to know that, for dSPACE1104, there are slave PWM blocks to working with low sampling rates. But unfortunately, there are no such options in Microlabbox. I am aware of the s-functions based model but looking for an alternative to that. I request you to guide me in working with more complex models such as sample-based controllers at low sampling rates. please share some useful information in this regard.

Thanks in advance.

i have checked in many documentations but i always find the same thing which transforms from abc to dq in a matrix form but if i want to do it in transmission lines where the generators, feeders, load were connected together how am i supposed to calculate my initial conditions in matlab simulation?

hello every body

I am trying to simulate a model composed of multiple subsystem in Simulink.

The problem i have is that, each subsystem has a different sampling rate and I don't know how I should incorporate different sampling rates in Simulink.

I would be grateful if you could help me out.

thanks a lot

I am confused to select the value of DC input to have some specific value of output voltage. Please suggest possible solution or voltage equation for inverters.

The datasheet is attached by file, can I ask how to calculate the turn on loss and turn off loss in different voltage , current and temperature to create the thermal description? Is it has the calculate formula?

I'm looking for an efficiency map (Torque - RPM - eta). Because of the low power need at the NEDC, the map should include low torque entries.