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ТОР 5 статей:

Методические подходы к анализу финансового состояния предприятия

Проблема периодизации русской литературы ХХ века. Краткая характеристика второй половины ХХ века

Ценовые и неценовые факторы

Характеристика шлифовальных кругов и ее маркировка

Служебные части речи. Предлог. Союз. Частицы

КАТЕГОРИИ:






Read and remember the key points about the main body.




The body should be well structured, divided up logically, with plenty of carefully spaced visuals. Remember these key points while delivering the body of your presentation:

· do not hurry,

· be enthusiastic,

· give time on visuals,

· maintain eye contact,

· modulate your voice,

· look friendly,

· keep to your structure,

· use your notes,

· signpost throughout,

· remain polite when dealing with difficult questions.

6. Read the example of the main body of the presentationHVDC VSC Technology for Offshore Wind Farm Applications. Identify listing, linking and sequen­cing words that provide coherence.

 

So that concludes the introduction. Now let’s move to the first part of the talk which is aboutOffshore Wind Farms. There are three things to consider. First since the wind farm requires a lot of space and adequate amount of wind, it’s much challenging to find out such a place in shore because of increasing population and civilization needs in general. And that compel us to make use of offshore wind farms. So then a substantial amount of energy is being generated by harnessing the power of offshore wind. Finally, there are still challenges in bringing the power from the offshore wind farm to the shore and then to the utilities. That completes the first part.

Now we come to the second part which is about HVDC VSC technology. There are two facts to mention. Firstly HVDC transmission based on VSC is a relatively new technology since it uses IGBTs (Insulated Gate Bipolar Transistor). Secondly, major companies that promote HVDC VSC are ABB and Siemens. By the way, HVDC VSC is prompted as HVDC light by ABB and as HVDC Plus by Siemens. That’s all I want to say for now on HVDC VSC technology.

So now let’s talk about the performance of HVDC VSC Converter Station as one of the major components of HVDC VSC based transmission for offshore wind farms. I’ll describe the process. First in VSC unit AC converts to DC and vice-versa. It uses IGBT so that it can reach high level of converted power due to evolution of semiconductor technology. Next as the switching frequency increases the number of harmonics also reduces thus the number of filters. Then a transformer connects the AC system to the converter in order to step up the voltage to the level of the VSC input inside. Also the transformer provides an reactance in between AC system and VSC system so that the zero frequency current flow is prevented between AC system and Converter. That ends the third part of my talk.






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