What are the harmonic effects on upstream network of distribution networks?

More Mehdi Hedayatpour's questions See All

Is there a microgrid with inductive line impedance (X>>R)?

hello I have work on microgrid area and microgrid voltage and frequency control. there is a contradiction for me about selecting the line impedance type (R>>X or X

10 November 2015 764 14 View

How can I determine input of fuzzy logic power system stabilizer?

Hello dear friends I work on power system stability. I have designed a power system stabilizer using fuzzy logic for damping of low frequency oscillation. Because it is difficult to directly...

31 December 2014 6,363 3 View

What are the best countries given the current state of the world, in fields of economics and culture?

What is your opinion in relation to best countries for life, education, jobs, income etc

02 March 2014 9,986 5 View

what are the drawbacks of voltage controlled of D-statcom?

As you know probably, conventional control method of D-statcom is based on the voltage control. In non-linear loads condition, what are the drawbacks of this method?

01 February 2014 6,787 1 View

How can I see outputs in STATCOM?

I want to simulink a STATCOM in the transmission line, but I can't see the STATCOM outputs. How can I see the output signals in scope? When I run this M.file (see attached) it gives me an error....

01 February 2014 7,529 4 View

How can I see Simulink output vector of STATCOM in matlab simulink?

I want use a STATCOM in Transmission line but I can't see the output of STATCOM in simulink. I would like to know how can I create an output block for STATCOM.

01 February 2014 9,404 3 View

How can I see STATCOM outputs?

In this picture, where can I find the signals & scope block in MATlab simulink? I looking for this block for depict of STATCOM outputs.

01 February 2014 224 2 View

How can I perform a dynamic simulation of BLDC motors in matlab simulink?

Your assistance is appreciated.

31 December 2013 6,318 5 View

How can I perform a dynamic simulation of BLDC motors in matlab simulink?

Dynamic simulation of BLDC motors in matlab simulink.

31 December 2013 3,257 6 View

Can anyone advise on designing a hybrid apf model using Matlab simulink?

Seeking an advice.

31 December 2013 1,642 4 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 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

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What is your perception on using visual analysis or quantitative approaches to evaluate data from single-case research designs (n of 1 trials)?

Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. A question our research team is...

03 March 2021 687 1 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Bogdan Tomoiaga

What about this paper? (https://www.researchgate.net/publication/4307798_The_load_flow_calculation_in_harmonic_polluted_radial_electric_networks_with_distributed_generation?ev=prf_pub)

Conference Paper The load flow calculation in harmonic polluted radial electr...

Pedro Werlinger

The harmonics are produced by non linear or commutated loads as current sources, and when they flow through a network they produce harmonic voltages in upstream busbars, Vi= Zi* Ii (i is the harmonic order, the frequency of the harmonic is i* 50 or 60 Hz). In this way, the pollution produced by these loads is extended to the whole network, and if a resonance occurs, these harmonics could be amplified and will cause many problems. To avoid these effects, frequency and magnitude of harmonics in a polluted electrical system should be measured or calculated in order to compensate them with appropiate tuned filters.