最新高效率光伏逆变器拓扑结构及功率器件介绍.pdf.

最新高效率光伏逆变器拓扑结构及功率器件介

绍

1 引言

[1]

1

1

– 1

3kw

[2]

4000

1%

120

4000

4 3kw

1%

30w

4×30=120

“

”

2 功率器件的选型

igbt

igbt

igbt

igbt

igbt mosfet

mosfet

sic

sic

3 光伏逆变器的设计目标

(1)

(2)

(3)

70%

boost

4 单相无变压器式光伏逆变器拓扑介绍

4kw

500v

2

3

2

3

boost h

igbt 50hz

igbt mosfet pwm boost

16khz

4.1

3

(1)

(2)

(3)

4.2

(1)

boost

(2)

igbt

4 vincotech flowsol-bi p896-e01

4 flowsol-bi boost

4.3

(1) boost

(2)

mosfet(600v/45mω)sic

boost

(3) h

(4)

75a/600v igbt sic mosfet(600v/45mω) 5 单相无变压器光伏逆变器专用模块flowsol0-bi的效率计算

boost

●pin=2kw

●fpwm = 16khz

●vpv-nominal = 300v

●vdc = 400v

5 6

(boost+inverter) 98.8%

98% 6

5 boost ee=99.6%

6 flowsol-bi -ee=99.2% igbt -ee=97.2% ( )

6 三相无变压器光伏逆变器拓扑结构介绍

7

1000v

7

1000v

1200v 1200v 600v

(npc=neutral point

clamped) 8 600v 1200v

8 npc

boost npc

(1) boost 9

9 flowsol-npb—boost

●

●

●

boost mosfet(600v/45 mω)sic

boost

(2) npc ( 10)

10 flowsol-npi -npc

●

●

●

●

75a/600v igbt

mosfet(600v/45 mω)

sic

boost npc dc+ dc-

boost

npc npc 10kw

11 boost

11 boost npc

1000v npc 1

2 npc (mosfet+igbt) 1200v igbt

12 npc ( ) ( )

npc 99.2% 96.4% npc

7 下一代光伏逆变器拓扑的设计思路介绍

h mosfet igbt

(1)

(2)

(3)

7.1

h ( 13)

13 igbt 50hz mosfet

16khz

99.2

2kw

et

mosfet mosf

13

igbt 50hz

14

14

vincotech igbt flowsol0-bi open e (p8

96-e02)

15

15 flowsol0-bi-open e (p896-e02)

(1) mosfet(600v/45mω) igbt(600v/75a)

14

sic

(2) boost

(3) h (4)

sic mosfet(600v/45 mω)

mosfet igbt

mosfet

2kw

0.2%

99.4%

125℃ mosfet

mosfet

125℃

mosfet

rds-on

fred fet

rds-on

16

16

sic

2

2kw

16 mosfet

7.2

npc

2kw

(

17)

99.2%

(

2)

17

1200v 18

d3 d4 sic

18 npc

1200v sic 19

19 npc ( 2 sic

d5

4 si )

600v sic d4 d6 d3 si d7 d 8 si sic

mosfet mosfet

20

20 mosfet npc

21 mosfet 2kw