How to control power optimizers connected to any photovoltaic inverter within the specifications?

I would like to know how the control of optimizers in series is done, therefore I understand it is necessary to keep the DC current equal for all and to do the MPPT. Does the DC link of the...

11 December 2018 4,242 1 View

Which protection circuits do you use for current and voltage sensors?

I will use sensors with up to 20A for current and 220V for voltage.

08 September 2018 4,647 0 View

What behavior to connect two cascaded MPPT?

If I connect two DC converters to a PV array, both of which have MPPT control, what would happen? Is there any work on this? PV -> [DC convert (1-MPPT)] Optimizer -> [DC convert (2-MPPT) - > AC]...

07 August 2018 3,385 0 View

What phrase from scientists most inspired you?

We always have a key phrase about the scientist we most admire in each area, what is yours?

04 May 2018 5,771 11 View

The number of citations is a quality metric for a paper? What metrics do you think are important?

I don't believe that citation is a reliable metric, since there are areas with more papers than others, so more quotes. Therefore, in my opinion should take into account a set of factors as impact...

04 May 2018 9,525 2 View

Discussion: In your opinion, what is the most important invention for humanity in your area? Why?

This question aims to discuss and raise opinions on scientific inventions in the most diverse areas of importance to humanity. Write about your area of study and what inventions were relevant to...

04 May 2018 540 1 View

What would be the price ratio between materials for semiconductor manufacturing? SiC, GaN, GaAs, for exemple?

Hi, The semiconductor industry continues to accelerate the production of devices with new materials, such as SiC, GaN, GaAs, which have better characteristics than silicon. But what would be the...

03 April 2018 8,541 0 View

Did we come at a time when the improvement in computational hardware has evolved more than the software can keep up?

I realize that the evolution of the hardware in computers has not been evolving as in the past, I believe due to the limitations of the software. How can this be bypassed? What research highlights...

03 April 2018 9,027 0 View

How is the use of photovoltaic energy encouraged in your country?

How is the incentive for photovoltaic energy in your country? What are the results achieved? This is a discussion that can greatly help understand the growth of PV systems.

03 April 2018 2,276 1 View

What better way to prove learning?

This discussion aims to gather ways to prove success in the learning process, within a new moment of education with the advance of Industry 4.0.

03 April 2018 8,722 2 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View