Điều khiển bộ lọc tích cực kiểu Shunt sử dụng dự báo mô hình dòng trên hệ tọa độ dq

n tính 3 pha không cân bằng chỉ ra 
rằng chất lượng lọc sóng hài đã đáp ứng tốt 
theo yêu cầu của tiêu chuẩn IEEE Std 519, 
trong đó THD của dòng điện sau khi lọc sóng 
hài có THD giảm từ 27,65% xuống 5,4% với 
biên độ sóng cơ bản bậc 1 chiếm gần 100%, 
các sóng hài bậc 3, 5, 9, 11, 13 không vượt 
quá 1% biên độ, thành phần sóng hài bậc 7 
chiếm 3%. Sau khoảng thời gian quá độ là 
0,012s dòng điện bù thực tế đầu ra của SAF ở 
ba pha A, B, C đã hoàn toàn bám theo dòng 
điện bù đặt được tạo ra bởi mạch vòng ngoài. 
Quá trình quá độ được cải thiện hơn so với 
phương pháp dùng bộ điều khiển PI trong tài 
liệu [28], [29]. 
LỜI CẢM ƠN 
Tác giả xin chân thành cảm ơn Trường Đại 
học Kỹ thuật Công nghiệp – Đại học Thái 
Nguyên đã hỗ trợ tài chính cho nghiên cứu 
này, trong khuôn khổ đề tài cấp trường mã số: 
T2016 -07. 
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SUMMARY 
CONTROL OF SHUNT ACTIVE FILTER BASED ON CURRENT MODEL 
PREDICTION ON dq FRAME 
Nguyen Van Chi
*
University of Technology - TNU 
The nonlinear loads present more in the power systems in the practice today by developing of 
electronic technology and using the small distributed power sourses (solar power, wind power 
ect), this causes the increasing the high frequency switch devices ect in the power network. 
Nonlinear loads cause non-sinusoidal currents and voltages with harmonic components, increasing 
the reactive power, overload of power lines and electrical devices, low power factor and affecting 
badly to the networks. Shunt active filters (SAF) with current controlled voltage source inverters 
(CCVSI) are used effectly to reduce the harmonics and to balance the phases sinusoidal source 
currents by generating the currents to compensate the harmonic currents caused by the nonlinear 
loads. In this paper we suppose a control stratergy to generate the compension currents of SAF by 
using the current model predictive engineering. This method is better than the control strategy 
using PI controller in term of transient time. The desired compensation currents can track exactly 
the reference compensation currents on the dq frame. The simulation results implemented on the 
nonlinear load, a full bridge rectifier and 3 phase unbalance load, show that the transient period 
decrease from 0.1s to 0.02s in comparing with PI controller. The experimental results proof that 
the THD of source currents decrease rapidly from 24.8% to 5.4% when using the proposed 
method, 
Keywords: Active Power Filter, Power Quality, CCVSI, total harmonic distortion (THD), PI 
controller 
Ngày nhận bài: 11/7/2018; Ngày phản biện: 11/8/2018; Ngày duyệt đăng: 31/8/2018 
*
 Tel: 0944 122388, Email: ngchi@tnut.edu.vn