Glossary entry (derived from question below)
Oct 21, 2009 08:38
14 yrs ago
2 viewers *
Spanish term
Spain
carga podada
Spanish to English
Tech/Engineering
Energy / Power Generation
power grid analysis
Mainland Spain. Context - a manual for software which generates the PV-QV curves (Active and reactive power vs voltage curves). This part deals with conditions for selecting loads to be used in the calculations:
... se incluyen todos los elementos en el conjunto de variación, independientemente de sus valores iniciales de P y Q. Las cargas de tipo “Podada” o “Servicios Auxiliares” nunca se incluyen ...
I can only think that this is the result of a spanishisation of the concept of :Point of Delivery (POD) loads. I would love an authoritative answer ... Thanks in advance!
... se incluyen todos los elementos en el conjunto de variación, independientemente de sus valores iniciales de P y Q. Las cargas de tipo “Podada” o “Servicios Auxiliares” nunca se incluyen ...
I can only think that this is the result of a spanishisation of the concept of :Point of Delivery (POD) loads. I would love an authoritative answer ... Thanks in advance!
Proposed translations
(English)
| 5 | clipped voltage |
slothm
|
Change log
Oct 26, 2009 17:08: slothm Created KOG entry
Proposed translations
3 hrs
Selected
clipped voltage
Alternate voltages are periodic sine waves. When the wave is cut horizontaly on the the top of the wave we then have a clipped wave form.
Full wave sine rectifiers are normally clipped at 0.707 of the maximum value.
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Note added at 7 hrs (2009-10-21 15:43:32 GMT)
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If the voltage is clipped then the power wil also be clipped.
Sine voltages are obtained from electric genertators. As the generator turns the polarity changes according to a sine function, so the output is a sine voltage.
However voltage generated in a photovoltaic sun farm, and most eolic fams is continuous. This continuous voltage has to be modified to obtain an alternate voltage. The voltage generated is not constant due to variations on impinging sun rays and to variations in the wind force.
Thus the continuous current is transformed into alternate current.
In the past, the continuous current drove a dynamo that was connected by a shaft to a generator that in the end produced the alternate current. Obviously this method lost energy in the dynamo (heat) and lost energy in the generator (more heat).
Modern generation using continuous current now transforms electronically most of the voltage obtained from energy farms.
First a global continuous current is formed by collecting all the partial currents, and then this current is transformed.
The resulting wave form can be serrated, square even sine, according to consumer needs.
True, electronic clipper technology first appeared within radio research activities, however it later evolved towards the first Zenner applications, (now standard in pocket radios, your PC and any electric transformer connected to the main line).
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Note added at 7 hrs (2009-10-21 15:50:18 GMT)
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This suggestion is based on experience on the field, so no references are mentioned. If needed we can perform a web research on the subject.
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Note added at 7 hrs (2009-10-21 15:55:50 GMT)
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The voltage wave form alternates from + to -.
The power is always positive but has zero values in between every hemycycle. So power generation has to consider this parameter. A clipped power wave is more uniform and more stable.
Full wave sine rectifiers are normally clipped at 0.707 of the maximum value.
--------------------------------------------------
Note added at 7 hrs (2009-10-21 15:43:32 GMT)
--------------------------------------------------
If the voltage is clipped then the power wil also be clipped.
Sine voltages are obtained from electric genertators. As the generator turns the polarity changes according to a sine function, so the output is a sine voltage.
However voltage generated in a photovoltaic sun farm, and most eolic fams is continuous. This continuous voltage has to be modified to obtain an alternate voltage. The voltage generated is not constant due to variations on impinging sun rays and to variations in the wind force.
Thus the continuous current is transformed into alternate current.
In the past, the continuous current drove a dynamo that was connected by a shaft to a generator that in the end produced the alternate current. Obviously this method lost energy in the dynamo (heat) and lost energy in the generator (more heat).
Modern generation using continuous current now transforms electronically most of the voltage obtained from energy farms.
First a global continuous current is formed by collecting all the partial currents, and then this current is transformed.
The resulting wave form can be serrated, square even sine, according to consumer needs.
True, electronic clipper technology first appeared within radio research activities, however it later evolved towards the first Zenner applications, (now standard in pocket radios, your PC and any electric transformer connected to the main line).
--------------------------------------------------
Note added at 7 hrs (2009-10-21 15:50:18 GMT)
--------------------------------------------------
This suggestion is based on experience on the field, so no references are mentioned. If needed we can perform a web research on the subject.
--------------------------------------------------
Note added at 7 hrs (2009-10-21 15:55:50 GMT)
--------------------------------------------------
The voltage wave form alternates from + to -.
The power is always positive but has zero values in between every hemycycle. So power generation has to consider this parameter. A clipped power wave is more uniform and more stable.
Note from asker:
| Thanks for the suggestion. If there were a reference to voltage, clipped load voltage would make sense. However, as these are loads, and it doesnt mention voltage in this context, I am not really convinced. Do "clipped loads" exist? Additionally, I think of clipped voltages in the context of electronics, rather than energy distribution. Am I wrong? |
| Yes, I now see your point. Although I don't see how you "clip" a load, I am going to assume that this is a case of an abbreviation, where clipped load is said when it would be more correct to say something like: load requiring clipped voltage/power. Thanks sooo much for taking the trouble to give a long explanation. |
4 KudoZ points awarded for this answer.
Comment: "Thank you very much. "
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