STMICROELECTRONICS STEVAL

STEVAL-ISV003V1
250 W microinverter for plug-in PV panels
demonstration board
Data brief
Features
■
Input voltage range from 18 V to 45 V
■
Output voltage range from 110 V to 240 V AC,
50/60 Hz
■
Grid connection algorithm and MPPT capability
■
Digital control section managed by the STM32
■
Reactive power management
■
RS-232 for communication
■
RoHS compliant
Description
The STEVAL-ISV003V1 is a demonstration board
which implements the microinverter concept and
is designed to optimize the power production of
each single solar panel by means of DC/AC
conversion. The conversion system is capable of
both grid synchronization and Maximum Power
Point Tracking (MPPT) thanks to the use of an
advanced control algorithm implemented in the
32-bit STM32 microcontroller. The MPPT function
is based on the perturb and observe (P & O)
concept which seeks the best operating point of
the panel, thus maximizing the energy produced
under any environmental condition. The grid
synchronization algorithm has the advantage over
standard solutions of a decoupled control of
active and reactive power. The STEVALISV003V1 demonstration board uses a highfrequency (HF) isolated DC/DC converter with
interleaved current and an optimized full-bridge
DC/AC inverter. The typical solar panel voltage is
first stepped up to about 400 V and then
converted into AC to create a sinusoidal output.
STEVAL-ISV003V1
In open-loop mode the sinusoidal reference is
created internally by means of a standard lookup
table, while in closed-loop mode, a sinusoidal
voltage feedback, proportional to the grid voltage,
is used. The system can be connected to either a
50 Hz or 60 Hz network, depending on local
requirements. Finally, the RS-232 interface can be
used for serial data transfer of specified voltage,
current and current signals.
An LED display provides a user-friendly interface
for the end user which allows monitoring and/or
modifying some of the main operating
parameters. Two modes of operation are available
and can be selected to allow either open-loop
operation or closed-loop operation in
synchronization with the grid.
October 2011
Doc ID 022334 Rev 2
For further information contact your local STMicroelectronics sales office.
1/12
www.st.com
12
2/12
VINPUT
Doc ID 022334 Rev 2
10 mOhm 1W 1%
R22
I_SENS_PV
1uF, 100V
1uF, 100V
C28
1uF, 100V
C27
1uF, 100V
C26
1uF, 100V
C25
1uF, 100V
C24
1uF, 100V
C22
1uF, 100V
C23
1uF, 100V
C21
1uF, 100V
C20
1uF, 100V
C19
1uF, 100V
C18
1uF, 100V
C17
1uF, 100V
C16
C15
D22
R18
10k 1%
VIN_SENS_PV
D24
Schottky
Gate 1
R10
150k 1%
Magnetica
800uH 4A
R8
R12
27/0.25W
2.7/0.25W
L6 INDUCTOR
Magnetica
800uH 4A
Q7
D23
Schottky
STH180N10F3-2
Gate 2
D21
R9
27/0.25W
2.7/0.25W
R7
STH180N10F3-2
Q5
12
9
D42
STPSC806G
3
2
10
7
1
T3
TRAFO
FUNCTIONAL ISOLATION
6
5
4
C12
2.2uF, 250V
2.2uF, 630V
C7
C13
2.2uF, 250V
C8
22uF, 450V
C9
22uF,450V
C10
22uF, 450V
100k 1%
R6
C11
22uF, 450V
High f PWM Low Side 1
Vbus_SENS
R3
15M 1%
High f PWM High Side 1
D16
27/0.25W
R4
3.3/0.25W
D14
D17
27/0.25W
R20
HIGH FREQUENCY
R1
3.3/0.25W
D9
SENS LEG1
OUT AC 1
R11
0.02/0.5W
Q3
STB42N65M5
D8
STPS3L40S
Q1
STB42N65M5
D6
STPS3L40S
D34
STPSC606
Low f PW M Low Side 2
6A
600V
Low f PW M High Side 2
STPSC606
D11
R5
3.3/0.25W
D15
27/0.25W
R21
27/0.25W
R23
SENS LEG2
LOW FREQUENCY
3.3/0.25W
R2
D10
R14
0.02/0.5W
Q4
STB42N65M5
OUT AC 2
Q2
STB42N65M5
Figure 1.
J1
CON_PV
L4 INDUCTOR
D40
STPSC806G
R19
DRAIN MOSFET HIGH 2
1
2
1
DRAIN MOSFET HIGH 1
Schematics
STEVAL-ISV003V1
Schematics
Isolated interleaved boost converter
AM10192V1
STEVAL-ISV003V1
Figure 2.
Schematics
Power supply section - 15 V
U1
5
3
Vcc
Osc
C138
220nF
C136
2.7nF
Boot
Vfb
6
1
2.7nF
C78
10nF
C80
1
D31
STPS3L60U
R42
56.2K, 1%
L4971
C83
220uF, 25V
PANASONIC
EEEFC1E221P
C139
100nF
C77
100nF
R39
24k
120pF
Vcc15V
L15
2
SS/INH
GND
7 Comp
C135
4
OUT
8
R38
20k
2
VINPUT
PANASONIC
EEEFK1J151AQ
C137
150uF,63V
Coilcraft
MSS1278-224
R40
16K, 1%
AM10193V1
Figure 3.
Power supply section - 5 V
U2
5
3
Vcc
Osc
C146
220nF
C145
2.7nF
C143
120pF
C140
100nF
R75
24k
1
Boot
Vfb
C142
10nF
6
1
C141
2.7nF
8
GND
Comp
C147
150uF,63V
Vcc5V
L17
2
7
OUT
SS/INH
R71
20k
2
VINPUT
PANASONIC
EEEFK1J151AQ
Coilcraft
MSS1278-224
4
L4971
D32
STPS3L60U
R78
2.7K, 1%
C144
220uF, 25V
PANASONIC
EEEFC1E221P
C148
100nF
R77
4.7K, 1%
AM10193V1
Figure 4.
DC/DC drive selection
IC3
R44
PWM1
3.3 ohm
R46
1
2
3
4
ENB1
PWM1
GND
PWM2
ENB2
OUT1
VCC
OUT2
8
7
6
5
Gate 1
Gate 2
PWM2
3.3 ohm
PM8834
C60
Vcc15V
10u 25V
LOW SIDE MOSFET DRIVER
Doc ID 022334 Rev 2
AM10194V1
3/12
Vbus_SENS
86.6k 1%
R128
3
2
8
-
+
Doc ID 022334 Rev 2
4
TS272
1
U13A2
C69
100n 50V
1k 1%
C71
100n 50V
R129
120
R130
Q10
2STN2340
3
4
1
2
HCNR200-300
LED K
LED A
PD2 K
PD2 A
PD1 K
PD1 A NC
NC
U21
7
8
6
5
3
2
TS272
1
U13A3
3V3
C74
150p 25V
59k 1%
R131
8
+
4/12
4
C76
100n 50V
ADC_BUS_VOLTAGE
Figure 5.
-
5Visol
Schematics
STEVAL-ISV003V1
V-bus sensing
AM10196v1
STEVAL-ISV003V1
Figure 6.
Schematics
5 V isolated
DCDC L5
NMV1505SAC
Vcc 15V
5V
0
1
5Visol
Gnd
Vcc15V
2
5
7
C56
100n 25V
C55
100n 15V
C53
1u 25V
AM10197V1
Figure 7.
PV voltage sensing section
R100
1k
5Vcc
C84
100n
IC11
ADC_PANEL_VOLTAGE
1
2
3
4
OUT1
Vcc+
In1-
OUT2
In1+
In2-
Vcc-
In2+
8
R101
10k 0.1%
7
R102
10k 0.1%
6
5
R103
3.3k 1%
TSV992
VIN_SENS_PV
C85
10n
AM10198V1
Doc ID 022334 Rev 2
5/12
6/12
C8
22uF, 450V
C9
22uF,450V
C10
22uF, 450V
Doc ID 022334 Rev 2
100k 1%
R6
C11
22uF, 450V
High f PWM Low Side 1
Vbus_SENS
R3
15M 1%
High f PWM High Side 1
D16
27/0.25W
R19
R4
3.3/0.25W
D14
D17
27/0.25W
R20
HIGH FREQUENCY
R1
3.3/0.25W
D9
SENS LEG1
OUT AC 1
R11
0.02/0.5W
Q3
STB42N65M5
D8
STPS3L40S
Q1
STB42N65M5
D34
STPSC606
Low f PW M Low Side 2
6A
600V
Low f PW M High Side 2
STPSC606
D11
R5
3.3/0.25W
D15
27/0.25W
R21
27/0.25W
R23
SENS LEG2
LOW FREQUENCY
3.3/0.25W
R2
D10
R14
0.02/0.5W
Q4
STB42N65M5
OUT AC 2
Q2
STB42N65M5
DRAIN MOSFET HIGH 2
Figure 8.
D6
STPS3L40S
DRAIN MOSFET HIGH 1
Schematics
STEVAL-ISV003V1
DC/AC topology: mixed-frequency inverter
AM10199V1
Doc ID 022334 Rev 2
C36
10uF 25V
RELAY _GRID
R27
470
330
R36
AC_NEUT
R29
10k 1%
Q9
2N7002
OUT AC 1
G5LE-1A4-DC12
3
1
D29
STPS2L25U
2
5
RL1
OUT AC 2
R28
5.6
2W
C31
470nF, 275VAC
Magnetica 2196.0001
C34
2.2n, 300VAC
EARTH GROUND
N.C.
R26
C29
2.2n, 300VAC
T1
10mH
Coilcraf t
BU10-6003R0BL
4
1
L14
3
2
C33
2.2n, 300VAC
N.C.
C30
2.2n, 300VAC
R25
1
1 2
2
I-
Magnetica 2196.0001
L13
I+
SC3
TMOV14R140E
SC1
TMOV14R140E
FUSE 2A
F1
1
2
SC2
V150LA20A
CON GRID
J2
NEUTRAL_sens
1
2
L1_sens
Figure 9.
Vcc15V
STEVAL-ISV003V1
Schematics
Output AC line filter
AM10200V1
7/12
Schematics
STEVAL-ISV003V1
Figure 10. Output current sensor
5Vcc
IC1
Vs(+)
5
I+
4
I-
PRI Iin GND (-)
OUT
1
2
C35
100n
3
PRI Iout
HONEY WELL
CSLW6B5
R30
Iout_sens
1k 1%
C37
22n
AM10201V1
Figure 11. AC line current sensing
R88
10K
5Vcc
R90
R92 10K 0.1%
100nF
4k7 0.1%
IC9
1
2
Iout_sens
AC LINE CURRENT SENSOR
3
4
OUT1
Vcc+
In1-
OUT2
In1+
In2-
Vcc-
In2+
8
C79
R94 560
7
AC_Line current
6
5
R96
1.1k
TSV992
AM10202V1
8/12
Doc ID 022334 Rev 2
NEUTRAL_sens
L1_sens
T2
6
7
PULSE 020-5384.0
4
1
19.4V
R79
10k,1%
10k, 1%
R72
C70
1nF, 50V
180k, 1%
R73
Doc ID 022334 Rev 2
R86
20k,1%
R84
20k,1%
5Vcc
R76
6.81k, 1%
10uF, 25V
C68
2
TS272
1
U13A1
C75
10nF, 16V
3
4
+
-
8
5Vcc
6.81k, 1%
R69
C67
100nF, 16V
1k, 1%
R74
C72
100nF, 16V
AC_Line v oltage
STEVAL-ISV003V1
Schematics
Figure 12. VOUT sensing section
AM10203V1
9/12
105 0
3
2
1
CON3
J13
3
2
1
3V3
GND
R104
10k
J14
3
2
1
3V3
C91
10pF
GND
PB13
PWM3
PWM2
PB1
TX_0
RX_0
TDO/SWO
TRST
GND
GND
R107 10k
RESET
3V3
C93
8Mhz
22pF
C92
22pF
PC5
PC6
PC7
PC8
PC9
A0_DAC
A1_DAC
PC12
PC13
LDAC (DAC)
SY NC (DAC)
ENABLE (DAC)
PB5
PB5
PB6 USART1_TX
PB7 USART1_RX
TIM4_CH3_LEG1
10k
R118
Y2
390
R115
180p
180p180p180p180p
GNDGNDGNDGNDGND
C113C114C115C116C117
180p
GNDGNDGNDGNDGNDGND
3V3
180p
NRST
OSC_OUT
OSC_IN
BOOT0
NOT CONNECTED
180p180p180p180p
3V3
25
24
23
138
106
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PC8
PC9
PC10
PC11
PC12
PC13-ANTI_TAMP
PC14-OSC32_IN
PC15-OSC32_OUT
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PB8
PB9
PB10
PB11
PB12
PB13
PB14
PB15
PA0-WKUP
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PA8
PA9
PA10
PA11
PA12
PA13
PA14
PA15
C101C102C103C104C105C106
180p
GND
C94
OSCOUT
OSCIN
ADC123_IN10
ADC123_IN11
ADC123_IN12
ADC123_IN13
ADC12_IN14
RESET#
PC12
PC13
ADC12_IN15
TIM8_CH1
TIM8_CH2
TIM8 CH3
TIM8 CH4
PC0
PC1
PC2
PC3
PC4
26
27
28
29
44
45
96
97
98
99
111
112
113
7
8
9
46
47
48
133
134
135
136
137
139
140
69
70
73
74
75
76
PB0 TIM3_CH3
PB1 TIM8_CH3N
PB2 BOOT1
PA13 JTAG
PA14 JTAG
PA15 JTAG
PA10
PA7 SPI1_MOSI
TIM1_CH1_LEG2
34
35
36
37
40
41
42
43
100
101
102
103
104
105
109
110
PA0 TIM2_CH1
PA1 RELAY -GRID
PB10 LDAC (DAC)
PB11 SY NC (DAC)
PB12 ENABLE (DAC)
TIM1_CH1N
PA2 TIM5_CH3
PA3 TIM5_CH4
TMS/SWDIO
TCK/SWCLK
TDI
PA10
PWM4
PWM1
AC_Line current
AC_Line v oltage
ADC_PANEL_CURRENT
ADC_PANEL_VOLTAGE
ADC_BUS_VOLTAGE
PC5
PC6
PC7
PC8
PC9
R106 0
PC15 OSC32_OUT
GND
1
JUMPER_3
C90
10pF
2
GND
3V3
GND
Y1
32.768Khz 472-0887
PC14 OSC32_IN
JUMPER_3
J12
SCLK (DAC)
DATA IN (DAC)
PA2
PA3
1
2
RELAY _GRID
VSS_1
VSS_2
VSS_3
VSS_4
VSS_5
VSS_6
VSS_7
VSS_8
VSS_9
VSS_10
VSS_11
GND
3V3
STM32F103ZET6
GND
C120C121C122C123C124
100nF 100nF 100nF 100nF 100nF
3V3
GND
C107C108C109C110C111C112
100nF
100nF 100nF 100nF 100nF 100nF
71
107
143
38
16
51
61
83
94
120
130
VDD_1
VDD_2
VDD_3
VDD_4
VDD_5
VDD_6
VDD_7
VDD_8
VDD_9
VDD_10
VDD_11
3V3
VDDA
131
121
95
84
62
52
17
39
144
108
72
GND
C118
10nF
VDD_A
33
VSS_A
GND
GND
30
Doc ID 022334 Rev 2
VREF-
VREF+
L16
3V3
R121
47
C119
10uF
BLM41PG600SN1L
GND
31
10/12
32
VBAT
GND
C98
10nF
3V3
PD15
PD14
PD13
PD12
PD11
PD10
PD9
PD8
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
PE15
PE14
PE13
PE12
PE11
PE10
PE9
PE8
PE7
PE6
PE5
PE4
PE3
PE2
PE1
PE0
PF15
PF14
PF13
PF12
PF11
PF10
PF9
PF8
PF7
PF6
PF5
PF4
PF3
PF2
PF1
PF0
PG15
PG14
PG13
PG12
PG11
PG10
PG9
PG8
PG7
PG6
PG5
PG4
PG3
PG2
PG1
PG0
86
85
82
81
80
79
78
77
123
122
119
118
117
116
115
114
68
67
66
65
64
63
60
59
58
5
4
3
2
1
142
141
55
54
53
50
49
22
21
20
19
18
15
14
13
12
11
10
132
129
128
127
126
125
124
93
92
91
90
89
88
87
57
56
FSMC_NWE
FSMC_NOE
KEY -DOWN
PD1
PD0
D3
D2
D15
D14
D13
PD10
PD9
PD8
D12
D11
D10
D9
D8
D7
D6
D5
D4
D[0..15]
D1
D0
PE3
PE2
PE1
PE0
A0
USER_BUTTON
KEY -CENTER
KEY -UP
KEY -LEFT
KEY -RIGHT
FSMC_NE4
PD15
PD14
PE7
PF0
PG0
PD5 FSMC-NWE
PD4 FSMC-NOE
PD3 KEY -DOWN
PE3
PE2
PE1
PE0
PG0
PG8 USER-BUTTON
PG7 KEY -CENTER
PG15 KEY -UP
PG14 KEY -LEFT
PG13 KEY -RIGHT
PG12 FSMC_NE4
-
6
U20
Schematics
STEVAL-ISV003V1
Figure 13. 32 bit MCU-STM32F electrical schematic
-
AM10204V1
STEVAL-ISV003V1
2
Revision history
Revision history
Table 1.
Document revision history
Date
Revision
Changes
07-Oct-2011
1
Initial release.
11-Oct-2011
2
Minor text changes on cover page.
Doc ID 022334 Rev 2
11/12
STEVAL-ISV003V1
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Doc ID 022334 Rev 2