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Power Filter Design and Analysis, Thesis of Electrical Engineering

Ho Chi Minh City University of Transport (HCMCUT)Electrical Engineering

The design and analysis of a power filter using a high-pass filter (HPF) and a low-pass filter (LPF) to reduce harmonics and improve power quality. calculations for component values, frequency response, and total harmonic distortion (THD) before and after filter implementation. It also discusses the impact of the filter on power factor and current total harmonic distortion (THDI).

What you will learn

What is the total harmonic distortion (THD) before and after filter implementation?
What is the purpose of the power filter?
How is the high-pass filter (HPF) and low-pass filter (LPF) designed?

What is the frequency response of the filter?
What are the calculations for component values?

Typology: Thesis

2021/2022

Uploaded on 05/22/2022

mantranle 🇻🇳

(5)

66 documents

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LỜI CAM ĐOAN

          









Tác giả

Trần Đức Thắng

Partial preview of the text

Download Power Filter Design and Analysis and more Thesis Electrical Engineering in PDF only on Docsity!

LỜI CAM ĐOAN

Tác giả Trần Đức Thắng

LỜI CẢM ƠN

Tôi xin bày t  lòng kính tr ng và bi c t i TS. Nguyn Xuân Tùng, gi ng viên B  môn H  th n  Vi n   i h c Bách khoa Hà N   i thc ti ng d n tôi tr ong su t quá trình th c hi tài này. Tôi xin bày t  l i c i Ban Giám hi u, Vi o Sau  i h c, Vi  n T Quang B u, cùng các gi  i h c Bách khoa Hà N ng d n tôi trong k hóa h  tài này.     i l i c   i các cán b hành chính c a Vi n và Vii h  chúng tôi trong quá trình h c t p t  ng.  c ngày hôm nay tôi không th  không nh n nh i thân  o m t h  ng ch c giúp tôi yên tâm hoàn thành công vi c và nghiên cu c a mình. Cu i cùng tôi xin g i t i toàn th b    ng nghi p l i bi  thành v  nh ng tình c m t p cùng s   quý báu mà m cho tôi trong su t th i gian gian làm vi c, h c t p, nghiên c u và th c hi tài này. Tác giả Trần Đức Thắng

DANH MỤC HÌNH VẼ








 





- 
- 
- 
- 

- 
- 
- .............................................................
- 
- 
- 




- 
- 

- 
- 

2.5. So ..............................................






- 
- 
      

4.1. Các thôn .........................................................................................
- 
- 
- 



4.5. T ................................................


 không sin
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
        

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
 
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



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...............................................................................
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

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 ..............................

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







MỞ ĐẦU

1. Lý do chọn đề tài                                          ,   tuy nhiên giá thành các                                           

Lịch sử nghiên cứu                công                      .

Mục đích nghiên cứu của luận văn, đối tƣợng, phạm vi nghiên cứu  trun              . 
Tóm tắt cô đọng các luận điểm cơ bản 

             hài  .
     .

 . N  4  Chương 1:   Chương 2:                                   

CHƢƠNG 1: GIỚI THIỆU CHUNG VỀ CHẤT LƢỢNG ĐIỆN NĂNG

VÀ SÓNG HÀI TRONG HỆ THỐNG ĐIỆN

1.1. Phân loại chất lƣợng điện năng                                 IEEE 1159    [1, 2]:      Sóng hài Th -    1.1:  IEEE 1159 - 1995 Loại Dải tần Thời gian tồn tại Biên độ Quá độ 1.1.  1.1.1. Nanosecond < 50 ns 1.1.2. Microsecond 50 ns 1 ms 1.1.3. Milisecond > 1 ms 1.2.  1.2.1.  < 5 kHz^ 0,3^ ^ 50 ms^0 4 pu

1.2.2.  5  500 kHz 20 micro giây 0 8 pu 1.2.3.  0,5  6 MHz 5 micro giây 0 4 pu

Biến đổi ngắn hạn 2.1.  2.1.1.  0,5   < 0,1 pu 2.1.2.  0,5   0,1 0,9 pu 2.1.3.  0,5   1,1 1,8 pu 2.2.  2.2.1.  - 3 s < 0,1 pu 2.2.2.  - 3 s 0,1 0,9 pu 2.2.3.  - 3 s 1,1 1,4 pu 2.3.  2.3.1.  (^) 3 sec  1 min < 0,1 pu 2.3.2.  3 sec  1 min 0,1 0,9 pu 2.3.3.  3 sec  1 min 1,1 1,2 pu
Biến đổi dài hạn 3.1.  > 1 min 0 pu 3.2.  > 1 min 0,8 0,9 pu 3.3.  > 1 min 1,1 1,2 pu
Điện áp không cân bằng

Biến dạng sóng điện áp 5.1.   0 0,1% 5.2.    (Harmonics)

(Interharmonics)

(Notching  

1.2. Khái niệm về sónghài              n có chu     Các sóng hình sin khác  Hình 1.1:   và dòng     óng hình 1.2).

Hình 1.2:  1.3. Các chỉ số đánh giá sóng hài trong hệ thống điện :

al Harmonic Distortion - THD).
 - TDD).   a. Tổng độ méo sóng hài T HDv và THDi):    (%).  Vi, Ii: l I (i = 2, ). V 1 , I 1 : l      (50Hz). Nhận xét: Nếu chỉ đánh giá sóng hài dựa theo hệ số tổng độ méo sóng hài THD thì có thể dẫn tới các kết luận không thỏa đáng. Lý do ở đây là trong trường hợp tải nhẹ, dòng tải nhỏ thì dù giá trị THD tính được có thể rất lớn nhưng cũng không đáng ngại do giá trị tuyệt đối của thành phần hài là nhỏ. Để có thể đánh giá chính xác hơn có thể dựa vào chỉ số “Tổng độ méo nhu cầu” sẽ được trình bày tiếp sau.

  i chung (000 V) L  ISC/IL <11 11 ≤ h ≤ 17 17 ≤ h ≤23 23≤ h ≤35 35≤h TDD <20 4.0 2.0 1.5 0.6 0.3 5. 20<50 7.0 3.5 2.5 1.0 0.5 8. 50<100 10.0 4.5 4.0 1.5 0.7 12. 100<1000 12.0 5.5 5.0 2.0 1.0 15.

1000 15.0 7.0 6.0 2.5 1.4 20. Sóng hài b  óng hài    dòng  ISC/IL.  ISC  IL :       i h (  00  00 0 V) L  ISC/IL <11 11 ≤ h ≤ 17 17 ≤ h ≤23 23≤ h ≤35 35≤h TDD <20 2.0 1.0 0.75 0.3 0.3 2. 20<50 3.5 1.75 1.25 0.5 0.5 4. 50<100 5.0 2.25 2.0 0.75 0.7 6. 100<1000 6.0 2.75 2.5 1.0 1.0 7. 1000 7.5 3.5 3.0 1.25 1.4 10. Sóng hài b  óng hài    dòng  ISC/IL.

ISC 

IL : N  

 (<161kV),  phát  ISC/IL <11 11 ≤ h ≤ 17 17 ≤ h ≤23 23≤ h ≤35 35≤h TDD <50 2.0 1.0 0.75 0.3 0.15 2.  50 3.0 1.5 1.15 0.35 0.22 3. 1.5. Các n guồn phát sinh sóng hài trong hệ thống điện  

      .
               .
  .
.   : Hình 1. 3 

Power Filter Design and Analysis, Thesis of Electrical Engineering

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LỜI CAM ĐOAN

LỜI CẢM ƠN

DANH MỤC HÌNH VẼ

MỞ ĐẦU

CHƢƠNG 1: GIỚI THIỆU CHUNG VỀ CHẤT LƢỢNG ĐIỆN NĂNG

VÀ SÓNG HÀI TRONG HỆ THỐNG ĐIỆN

ISC 

IL : N  