74
[1鄄2]
MPPT
maximum power point tracking
:
2017鄄06鄄29
:
2017鄄10鄄09
:
2017KZ0020
2016106
2016111
ycjj2017059
ycjj2017058
Project Supported by Sichuan Provincial Department of Sci鄄
ence and Technology Project
2017KZ0020
; Sichuan Province
Science and Technology Innovation Talent Project
2016106,
2016111
;Innovation Fund for Graduate Students of Xihua U鄄
niversity
ycjj2017059, ycjj2017058
:
10.13234/j .issn.2095-2805.2017.6.68
TM464
A
基于 DSP 的微逆变器双频率控制方法及实现
1
2
3
1
2
3
1
2
3
1
2
3
1.
610039
2.
610039
3.
610039
:
DCM
DCM
PSIM
DSP
THD
:
DCM
YANG Boyong
1
,
2
,
3
, WA N G Jun
1
,
2
,
3
, YA N Tiesheng
1
,
2
,
3
, SUN Zhang
1
,
2
,
3
(
1. Sichuan Province Key Laboratory of Power Electronics Energy鄄saving Technologies&Equipment, Xihua University,
Chengdu 610039, China; 2. School of Electrical Engineering and Electronic Information, Xihua University, Chengdu 610039,
China; 3. Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Cheng du 61 0039, China
)
Abstract
The peak value of the primary side current, the volume and the lo s s of the transformer in the conve鄄
ntional interleaved flyback inverters are relatively large. To solve these problems, an dual frequency control strategy
based on the primary peak current control and the inductor discontinuous current mo de
DCM
was propos ed. First, the
expression of reference current in DCM mode was derived. On this basis, the selection principle of switching frequency
switching point in dual frequency control strategy was analyzed in detail, and the expression of selection was derived.
This method can automatically adjust the switching frequency according to the change of the loa d size. Then the number
of switches is reduced and the switching loss is reduced to the maximum extent. Finally, the validity of the design is
verified by PSIM simulation anal ys is, an d an experimental platform with a digital signal processor
DSP
as the core con鄄
troller is developed. The experimental results show that the control strategy can reduce the peak valu e of the primary
current and ensure the system efficiency , achieve a lower current harmonic distortion rate
THD
.
interleaved flyback; micro鄄inverter; discontinuous current mode; adaptive control
电 源 学 报
Journal of P ower Supply
Vol.15 No.6
Nov. 2017
15
6
2017
11