शैडोइंग अभ्यास: How Does Electricity Flow Through a Utility-Scale Solar Site? - वीडियो के साथ अंग्रेजी बोलना सीखें
पाठ बनाया जा रहा है...
1
I wanted to take the time to make sure you all totally understood the concept of electrical flow through the PV plant.
2
The following slides show one specific setup in regards to power conversion and electrical flow.
3
So, firstly, sunlight strikes the PV modules.
4
The sunlight is converted into electricity within the PV module.
5
And as we know from previous slides, the electricity that's generated is DC electricity, direct current.
6
Modules are wired together in strings.
7
Remember that a string is just the technical name for a group of modules all wired together in series.
8
This string of PV modules is basically collecting all the electrical current.
9
And all of this collected up electricity is then transported via
10
a home run of DC cabling to a combiner box as shown.
11
So you now have the electricity from multiple strings all feeding into a single combiner box, where additional electrical protection such as fuses will be located.
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The combiner box is pretty much doing exactly what it says, combining or consolidating all this electricity.
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There's a few obvious benefits here.
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The DC feeders are higher gauge cables, so they'll have reduced electrical losses.
15
And since each of them can carry more current, there's simply less of them, which makes for easier management and less terminations once we get to the inverter stage.
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The DC electricity then needs to be transported from the combiner box to the next key component in line, the inverters, shown here.
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This is achieved using what are commonly known as DC feeders.
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There's a number of ways to do this, either an underground trenching or above ground cable trays.
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Once the DC electricity has been transferred to the inverter, the inverter does its job, which is to convert this DC electricity into AC electricity.
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Remember that the key reason we need to do this is
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that the electricity on the utility grid is all high voltage AC and we have to match that.
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So now we have AC electricity which has been produced by the inverters
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and we need to transport this electricity to the next step in the chain which is the transformer.
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Now we're at the transformer level, and the transformer's job is to step the voltage of the AC electricity up.
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The reason for this is that as we should remember back from our power and voltage slides much earlier in the presentation, and our discussion around Ohm's law,
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resistance equals voltage divided by current.
27
Now remember that power can be calculated by multiplying voltage by current,
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but Ohm's states that voltage can also be expressed by current multiplied by resistance.
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This means that you can calculate power by squaring your current and multiplying it by the resistance.
30
Since the resistance of the cabling from the transformer to the interconnect won't change, as that's a function of the material that's being used,
31
to minimize the power losses in the system we want to minimize the current as much as possible.
32
The only way to do that, again going back the Ohm's law is to increase the voltage.
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So step the voltage up, reduce the current required and reduce the power losses in the system.
34
We then need to transport this AC electricity from the location of the transformer out to the point of interconnect.
35
This is done via AC cabling and is commonly done via underground trenching.
36
The point of interconnect, or POI, is simply where the power plant ties into the utility grid.
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Now, once you're at the point of interconnect, depending on the size of the plant or the transmission lines you're tying into,
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there may be another transformer to step the voltage up again to match what's on the existing lines
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so you can go from 34.5 kV up to 69 kV
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or even higher
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and there you have it you've then got high voltage ac electricity onto the utility lines
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so what started as sunlight hitting an individual pv module
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which created low voltage dc electricity has gone through all these various steps
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and conversions through home runs combiner boxes dc feeders inverters transformers ac cabling
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and is then connected into the utility lines as high voltage ac
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इस पाठ की शब्दावली और बोलने के सुझाव
इस वीडियो में शैडोइंग के लिए 45 वाक्य और 696 शब्द हैं। बोला गया हिस्सा 4:08 लंबा है। वक्ता लगभग 169 शब्द प्रति मिनट की स्वाभाविक गति से बोलता है, जो रोज़मर्रा की बातचीत के करीब है। केवल 77% शब्द अंग्रेज़ी के 3,000 सबसे आम शब्दों में से हैं, इसलिए शब्दावली कठिन है।
इस वीडियो की मुख्य शब्दावली
वीडियो के 15 सीखने लायक शब्द, उच्चारण और अर्थ के साथ:
| शब्द | उच्चारण | अर्थ |
|---|---|---|
| voltage संज्ञा | /ˈvəʊltɪd͡ʒ/ | विभवांतर, वोल्टता |
| module संज्ञा | /ˈmɑd͡ʒul/ | मॉड्यूल |
| string संज्ञा | /stɹɪŋ/ | तार, रस्सी |
| sunlight संज्ञा | /ˈsʌnˌlaɪt/ | धूप |
| wire संज्ञा | /ˈwaɪɚ/ | तार |
| commonly क्रिया विशेषण | /ˈkɑmənli/ | सामान्यतः |
| collect क्रिया | /ˈkɑlɪkt/ | शामिल होने, इकट्ठा करना |
| underground विशेषण | /ˌʌn.dəɹˈɡɹaʊnd/ | भूमिगत, अंतर्भौम |
| grid संज्ञा | /ɡɹɪd/ | झर्झर, जाली |
| calculate क्रिया | /ˈkælkjʊleɪt/ | गणना करना, हिसाब रखना |
| trench संज्ञा | /ˈtɹɛnt͡ʃ/ | खाई |
| transmission संज्ञा | /tɹænsˈmɪʃən/ | पारेषण |
| generate क्रिया | /ˈd͡ʒɛn.ə.ɹeɪt/ | उपजाना |
| combine क्रिया | /kəmˈbaɪn/ | मिलाना |
| divide क्रिया | /dɪˈvaɪd/ | बांटना |
इस वीडियो का व्याकरण
वक्ता जिन संरचनाओं का सबसे अधिक प्रयोग करता है, वीडियो के असली शब्दों के साथ:
| संरचना | वीडियो में |
|---|---|
| Passive voice be + past participle — ज़ोर इस पर कि क्या होता है, न कि कौन करता है | is converted · are wired · will be located |
| Present perfect have/has + past participle — बीता हुआ काम जिसका असर अभी भी है | have reduced · has been transferred · has been produced |
| Relative clauses who / which + उपवाक्य — व्यक्ति या वस्तु के बारे में अतिरिक्त जानकारी | them, which makes · job, which is · electricity which has |
ध्यान देने योग्य उच्चारण
वक्ता 6 बार संक्षिप्त रूपों का प्रयोग करता है, जैसे you're, they'll, we're। इन्हें वैसे ही छोटा बोलें जैसा आप सुनते हैं।
- “sh” और “zh” की ध्वनियाँ: conversion /kənˈvɝʒən/, transmission /tɹænsˈmɪʃən/, presentation /ˌpɹɛzn̩ˈteɪʃn̩/, termination /tɚmɪˈneɪʃən/
- लंबे शब्द — बलाघात सही रखें: electricity /ɪˌlɛkˈtɹɪsɪti/, electrical /ɪˈlɛktɹɪkəl/, utility /juːˈtɪlɪti/, termination /tɚmɪˈneɪʃən/, interconnect /ˌɪn.tə.kəˈnɛkt/
इस वीडियो से अभ्यास कैसे करें
- पहले बिना बोले पूरा वीडियो एक बार सुनें और जो शब्द नहीं आते उन्हें लिख लें।
- 0.75× गति से शुरू करें, एक-एक वाक्य की शैडोइंग करें, और सहज लगने पर सामान्य गति पर लौटें।
- अपनी आवाज़ रिकॉर्ड करें और मूल से तुलना करें, ख़ासकर voltage, module, string जैसे शब्दों पर ध्यान दें।
शैडोइंग तकनीक क्या है?
शैडोइंग (Shadowing) एक विज्ञान-समर्थित भाषा सीखने की तकनीक है जो मूल रूप से पेशेवर दुभाषिया प्रशिक्षण के लिए विकसित की गई थी। विधि सरल लेकिन शक्तिशाली है: आप मूल अंग्रेज़ी ऑडियो सुनते हैं और तुरंत इसे ज़ोर से दोहराते हैं — जैसे वक्ता की छाया 1-2 सेकंड की देरी से। शोध से पता चलता है कि यह उच्चारण सटीकता, स्वर, लय, जुड़ी हुई ध्वनियाँ, सुनने की समझ और बोलने की प्रवाहशीलता में काफ़ी सुधार करता है।