1 / 19

Fundamental of Electrical Loads

Fundamental of Electrical Loads. Chapter 7. The Load Curve . It gives the following information Variation of load during different hours of day Max. and Min. value s of daily load Average annual load of the station Information whether the installations is working efficiently or not.

malcolm-durham
Download Presentation

Fundamental of Electrical Loads

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fundamental of Electrical Loads Chapter 7 Prof. Magdi El-Saadawi

  2. The Load Curve • It gives the following information • Variation of load during different hours of day • Max. and Min. value s of daily load • Average annual load of the station • Information whether the installations is working efficiently or not Prof. Magdi El-Saadawi

  3. Prof. Magdi El-Saadawi

  4. Prof. Magdi El-Saadawi

  5. شكل توضيحى لحمل حكومى المحور الرأسى يمثل الحمل بالكيلو وات المحور الأفقى يمثل الزمن بالساعات Prof. Magdi El-Saadawi

  6. Difference between load curves of summer and winter Prof. Magdi El-Saadawi

  7. Prof. Magdi El-Saadawi

  8. Prof. Magdi El-Saadawi

  9. Prof. Magdi El-Saadawi

  10. Load Duration Curve Prof. Magdi El-Saadawi

  11. Load Duration Curve Prof. Magdi El-Saadawi

  12. Load Curve and Load Duration Curve Prof. Magdi El-Saadawi

  13. Average Demand: the ratio of kWh delivered by the station in a particular period divided by the hours in that period • Load Factor Monthly L.F. = kWh supplied in a month Maximum demand * 24 * 30 Annual L.F. = kWh supplied in a year Maximum demand * 8760 Prof. Magdi El-Saadawi

  14. Diversity of Load يعنى أن الأحمال المختلفة لا تعمل فى فترة زمنية واحدة أو أن شركات الكهرباء تتبع سياسات تدفع إلى ذلك • Diversity Factor the ratio of the sum of maximum demands of the individual category to the maximum demand of the power station Prof. Magdi El-Saadawi

  15. Practical Example on Diversity Factor Solution 1:Transformer Size (Assuming Diversity Factor of 1.0) 2,000 + 1,500 + 1,000 = 4,500 kVA Solution 2:Transformer Size (Assume Diversity Factor of 1.2) Choose 3,750 kVA (4,500 kVA divided by 1.2 = 3,750 kVA) Prof. Magdi El-Saadawi

  16. ? Which is better and why High or Low load factor value High or Low diversity factor value Prof. Magdi El-Saadawi

  17. Plant Factor Indicates how best the plant capacity has been utilized Station output in kWh kW1*h1 + kW2*h2 + kW3*h3 + ……. • Capacity Factor is a value used to express the average percentage of full capacity used over a given period of time. Average demand on the Station Maximum Installed Capacity of the Station Prof. Magdi El-Saadawi

  18. Connected Load Factor Average kWh Connected load * 8760 Prof. Magdi El-Saadawi

  19. Load Duration Curve Prof. Magdi El-Saadawi

More Related