photovoltaic | a MongoDB/Solr search connector | Search Engine library
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kandi X-RAY | photovoltaic Summary
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Community Discussions
Trending Discussions on photovoltaic
QUESTION
I am trying to simulate two FMUs with the one having inputs as CSV files by using the Master
. What I have tried is the following:
ANSWER
Answered 2021-Dec-01 at 14:19def load(t):
return 10, math.cos(t)
input_object = ([(electricity_network, 'P_load1'),(electricity_network, 'P_load2')],load)
QUESTION
I am making a code which takes in jumble word and returns a unjumbled word , the data.json contains a list and here take a word one-by-one and check if it contains all the characters of the word and later checking if the length is same , but the problem is when i enter a word as helol then the l is checked twice and giving me some other outputs including the main one(hello). i know why does it happen but i cant get a fix to it
...ANSWER
Answered 2021-Nov-25 at 18:33As I understand it you are trying to identify all possible matches for the jumbled string in your list. You could sort the letters in the jumbled word and match the resulting list against sorted lists of the words in your data file.
QUESTION
I have a problem with a pyomo model, which has been partly answered here already: TypeError PYOMO: Defining constraints based on pandas dataframe
However, first of all I don't really understand the problem and if I apply the proposed fix I get another error.
So here I will provide you with some of my code. I have a photovoltaic model with some constraints and a solar thermal model with some constraints that theoretically could fight for the same available area:
...ANSWER
Answered 2021-Jul-20 at 15:03Your post does not have all of the variables defined in order to really troubleshoot this well. If the below doesn't answer your question, you should edit your post by removing unnecessary parts of the model and include variable definitions and a snippet of sample data to reproduce the error.
That said, I think you are getting bit by another manifestation of the same issue regarding the interaction of non-indexed pyomo
variables with numpy
data types. I think that both pyomo
and numpy
are trying to override some of the basic algebraic functions to produce consistent data types. pyomo
is trying to create pyomo.expressions
, while numpy
is trying to maintain ndarray
s. (There's probably a fuller description of this issue in the pyomo
bug report on this issue, but that, I think, is biting you.)
My suggestion, especially when you have a singleton pyomo
variable, is just to not use numpy arrays or variables in your model. Just force convert them to basic python types and you'll be fine. (As shown in linked post.)
If you want to persist with the way it is now, you should pull the equation out of your constraint and tinker with it after defining all the variables and ensure that it evaluates to a pyomo
expression. When the variable is a singleton, order matters when interfacing with numpy
arrays. Yes, this is ugly. So strongly recommend either indexing all variables or converting everything to basic types, which is easy.
QUESTION
I'm using this USB-to-RJ45 cable to connect my Windows 10 developer workstation to the EPEver Tracer 3210an solar charge controller.
I'm using Python 3.8.6 with the minimalmodbus
module to attempt to connect to the device, retrieve data, and control the device parameters.
The charge controller returns the input voltage of the photovoltaic (PV) panels.
Actual Result ...ANSWER
Answered 2020-Oct-08 at 19:16Communication with these controllers (manual) is via RS485 (delivered through an RJ45 connector). This is only mentioned briefly in the manual ("RS485 interface" in the technical specifications section).
The cable you are using appears to be a router console cable which, I believe, uses the RS232 protocol (see document from Cisco as an example). RS232 and RS485 are different, and incompatible, so this cable will not work.
The manual for this controller does not go into much detail and I could not see a modbus manual on the EPEVER website. I use Tracer-BN series units and epever support emailed me a manual detailing the modbus setup; as your unit also supports the MT50 remote meter I'm assuming its registers are the same. You can probably find the manual by searching for "common software or MT50 LCD unit" (with the quotes) - I believe version 2.5 is the latest (note: I'm not posting the link because it does not seem to be available on the official website so click at your own risk!)
The RJ45 wiring (from the above manual) is:
QUESTION
I'm a college student in Taiwan and I'm doing a research about "how much wind turbines and solar photovoltaic panels should be installed to satisfy the require of minimum energy penetration rate in a semiconductor factory".
My professor hope I can display each variable in each period, but I don't know what code I should write. Maybe there will be "execute" and "writeln" in my code? But there is nothing happened.
The following is my brief code:
...ANSWER
Answered 2020-Aug-24 at 05:09In order to print the solution to a console, you can use a post-processing block. A post-processing block is implemented by putting an execute
block after the constraint specification (after the subject to
block).
A post-processing block to print variables could look like this (untested code):
QUESTION
I'm a bit stuck at my Bachelor's thesis and hope you can help me. In order to evaluate a photovoltaic system I need to calculate the difference between total energy amounts. These are automatically updated in a MySQL-table with a timestamp, but without an id-number. I need to get the delta/difference between those energy amounts automatically as a extra column to visualize it in Grafana.
...ANSWER
Answered 2020-Jun-24 at 08:08How you approach this depends on your skill set with various tools. I, for example, am old in 'C' but green in SQL.
Now: Assuming that you have a database already, and want to create a new one with the extra field in it, this is broadly how I would approach it.
Create a new empty database with the fields you want in it.
QUESTION
My data frame looks like -
...ANSWER
Answered 2020-Jun-15 at 09:53Problem: I believe you have a name conflict for stopwords
. There is probably a line somewhere in your notebook where you assign:
QUESTION
I am using three different background colors to highlight edits I am doing against three different types of comments received for my submitted article to a journal. I am successful in highlighting the text and citations and references in main body of the paper. However, I was not successful in highlighting the citations in the Reference section. I would like to highlight them using same background color as in the text.
...ANSWER
Answered 2020-Apr-16 at 14:34I added an optional argument to \citecolor
that allows you to specify how many lines each bibitem has
QUESTION
Hi I am writing a revised article. I am highlight the background of the revised text with different background color. I was succesful in highlighting them but I could not highlight the citations in the Bottom References.
...ANSWER
Answered 2020-Apr-16 at 12:05\ref
worked already out of the box with your code. To make \cite
also compatible, you can add \soulregister\cite7
QUESTION
Apologies if this is not the right place for this question.
I've recently started using MIT's MEEP software (Python3, on Linux). I am quite new to it and would like to mostly use it for photovoltaics projects. Somewhat common shapes that show up here are "inverted pyramid" and slanted (oblique) cone structures. Creating shapes in MEEP seems to generally be done with the GeometricObject class, but they don't seem to directly support either of these structures. Is there any way around this or is my only real option simulating these structures by stacking small Block objects?
As described in my own "answer" posted, it's not too difficult to just define these geometric objects myself, write a function to check if it's inside the object, and return the appropriate material. How would I go about converting this to a MEEP GeometricObject, instead of converting that to a material_func as I've done?
...ANSWER
Answered 2020-Feb-27 at 21:06No responses, so I thought I'd post my hacky way around it. There are two solutions: First is as mentioned in the question, just stacking MEEP's Block object. The other approach I did was define my own class Pyramid, which works basically the same way as described here. Then, I convert a list of my class objects and MEEP's shape object to a function that takes a vector and returns a material, and this is fed as material_func in MEEP's Simulation object. So far, it seems to work, hence I'm posting it as an answer. However, It substantially slows down subpixel averaging (and maybe the rest of the simulation, though I haven't done an actual analysis), so I'm not very happy with it.
I'm not sure which is "better" but the second method does feel more precise, insofar that you have pyramids, not just a stack of Blocks.
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Install photovoltaic
You can use photovoltaic like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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