If fiber optic is used in HV substation for communication, do we still need line trap?

What is the function of line traps other than communication?

08 September 2018 9,854 2 View

Is it correct to use Thevenin's theorem to calculate current in a particular branch in a power system?

Let say I want to know the current flowing through a new line connecting bus A and bus B. I generate a Thevenin equivalent circuit of the system seen from bus A - B. Is this legitimate?

11 December 2017 1,702 3 View

How to automatically iterate generator location in power system analysis software?

Let's say I want to optimize a new generator location in an existing power system. I need to know how's the system efficiency, reliability, etc with the new generator. Can I use ETAP or...

09 October 2016 3,744 6 View

What is the definition of repair rate in Markov state space analysis?

There is a confusion in defining repair rate. From Richard Brown's book, Power Distribution Reliability, it is said that repair rate is the inverse of repair duration, which is defined as the mean...

08 September 2016 9,971 4 View

What are the requirements to make a distribution grid able to operate in intentional islanding mode?

Let's say we have an ordinary radial distribution system. Now we want this network to be able to run intentional islanding with diesel generators connected to the end of the network. What are the...

07 August 2016 5,805 5 View

What is the best protection scheme for radial or weekly meshed distribution system?

If we don't take cost into account, is using sectionalizers is always better than using two CB? What if we consider the cost?

03 April 2016 8,391 3 View

What is acceleration factor in load flow study?

How does it affects the accuracy and convergence of a load flow study? Why is it typically 1.6? Does it have something to do with the golden ratio?

03 April 2016 5,571 9 View

How does line charging VAR affects the result of load flow study?

Is it significant in distribution system?

03 April 2016 4,046 3 View

How to randomize DG location in Simulink?

I have a power distribution system model in Simulink. I want to optimize DG location. How to randomize its position?

02 March 2016 8,806 4 View

Can backward-forward sweep load flow algorithm be applied to non-radial distribution system?

For example for weakly meshed or loop distribution system.

02 March 2016 3,275 5 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

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 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

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