How much unbalance is acceptable in grid connected wind converter?

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Do you have any idea about ground connection in transformerless on-grid solar inverters?

Is it true that null wire of grid and inverter case and solar panel frame are all connected to same ground? Can this connection result in a short circuit? Is there any requirements for this...

01 February 2017 5,056 1 View

How can I simulate a delta-zig zag transformer in Matlab?

As there is no model for such a transformer in Matlab, I need the exact equations of primary and secondary voltage and currents of this transformer and also the wiring connections so that I can...

06 July 2016 5,222 5 View

What special consideration should we give to choose a transformer for an inverter?

which kind of core material, wiring (delat-wye, delta-zigzag, ...) is appropriate for a 3-phase inveter according to the harmonic problems, acoustic noise, neutral overload supplying nonlinear...

31 December 2015 8,859 9 View

Which voltage quantity must be monitored Investigating output characteristics of UPS systems based on IEC62040-3?

My understanding of IEC62040-3 is that for linear loads, RMS output voltage of UPS systems must be checked according to the specified criteria and for nonlinear loads, voltage of rectifier load...

31 December 2015 1,865 9 View

What software is useful for mechanical analysis of displacement and bending in sheet metal enclosure?

I am currently working with Solidworks. Solidworks s good for modeling assembly parts but it isn't strong with mechanical analysis. I worked with ANSYS and Abaqus but both of them are difficult...

10 November 2014 1,744 5 View

What kind of motor is use in hybrid car?

I think BLDC motor is used in hybrid car . Is this correct?

09 October 2014 1,358 0 View

Can anyone suggest a method for linear NTC for temperature measurement?

NTC is nonlinear.

09 October 2014 5,323 7 View

What kind of this is better PLL or FLL?

For grid connected solar inverter

09 October 2014 9,733 1 View

What kind of renewable energy is better in Iran: solar, wind or CHP ?

CHP =combined heat and power for more inefficiency.

09 October 2014 2,036 9 View

What is the reason of DC harmonics in grid-connected converters?

We designed a grid-connected converter for wind. We saw in the grid side there is a DC current. Can anybody solve this problem?

09 October 2014 2,737 7 View

Can you connect an HPLC to a Mass Spec only at a certain time point?

Can anyone explain this method? Especially the last statement where it says only at 1.5 to 2.5mins was the MS/MS connected to the UPLC. How is that possible, is it a feature in this specific...

11 August 2024 8,141 3 View

Geotechnical Engineering (Proceedings of the ICE) time review?

Hello everyone, I recently submitted an article to Geotechnical Engineering (Proceedings of the ICE), and the current status has been listed as "EiC Pre-assessment: Ready" for the past 20 days. I...

10 August 2024 6,493 1 View

How to develop investments in renewable energy sources?

08 August 2024 5,112 3 View

How can major oxides determined by ICP-MS/ES be normalized to 100% volatile free? How does this connect with LOI?

I am analyzing cherts from different sources found within one specific geologic formation using ICP-MS/ES. My committee was asking this question about my analysis. I was not sure how to answer this

05 August 2024 7,902 3 View

In WECS : Gain values for conversion of PMSM rotor speed(rad/s) to p.u. input to wind turbine and Torque(pu) of WT to input of PMSM-Torque (Nm) ?

I am working on developing a MATLAB Simulink model of Wind turbine with PMSG followed by MPPT Boost converter. I have gone through so many literature and videos but I am not finding clear solution...

03 August 2024 888 1 View

How do environmental toxins interact with genetic predispositions to increase cancer risk?

I am currently researching the impact of environmental toxins on children's health and would greatly appreciate insights from experts in the field. If you are an expert or researcher working on...

02 August 2024 2,627 1 View

Conjugation of PEG-Amine to an Amino Acid Using EDC?

I am attempting to conjugate PEG to an amino acid at the C-terminus, for the purposes of producing nanoparticles. I have been told that PEG modified with amine groups can be used for this purpose,...

31 July 2024 2,033 1 View

Is artifacts in XPS possible to build high deviation in binding energy larger than 5 eV??

Hello. Thanks for your consideration to see my question. Recently, I conducted XPS anaylsis of g-CN that is prepared from thermal polycondensation of DCDA, so-called conventional bulk-g-CN,...

30 July 2024 9,824 2 View

What should a Mechanical Engineering PhD scholar focus on during their PhD to enhance their chances of securing a postdoctoral position?

29 July 2024 7,714 4 View

May I know the exact Quartile of the journal- Advanced Engineering Materials (Wiley) for material science category?

In some data sources it has been grouped in Q1 and some shows it is Q2.

29 July 2024 4,227 2 View