STEVAL-ISV002V W photovoltaic converter for grid-connected applications. Features. Description

Transcription

1 STEVAL-ISVV Features W photovoltaic converter for grid-connected applications Data brief DC-DC input voltage: V to V DC-DC output voltage: V DC-AC output voltage: Vac Nominal output power: kw DC-AC switching frequency: khz DC-DC switching frequency: khz Transformer turns ratio:. Grid voltage: V rms +/-% Grid frequency: Hz Power factor: above %; rated power >.9 full load: < % RoHS compliant Description In recent years, interest in photovoltaic (PV) applications has grown exponentially. Because PV systems require an electronic interface to be connected to the grid or standalone loads, the PV market has become appealing for many power electronics manufacturers. The STEVAL-ISVVdemonstration board implements a conversion system for PV applications with the aim of achieving high efficiency and significant reduction in production costs. It consists of a high-frequency isolated input power section which performs the DC-DC conversion, and an inverter section capable of delivering sinusoidal current at Hz to the grid. The system operates with input voltages in the range of V to V, and is tied to the grid at V rms, Hz, through an LCL filter. Other unique characteristics of the proposed converter are integration level, decoupled active and reactive power control and flexibility towards the source. STEVAL-ISVV A fully digital control algorithm, including power management for grid-connected operation and MPPT (maximum power point tracking) algorithm, has been implemented on a dedicated control board, equipped with a latest-generation -bit (STM) microcontroller. October Doc ID Rev / For further information contact your local STMicroelectronics sales office.

2 STEVAL-ISVV Figure. STEVAL-ISVV power stage circuit schematic / Doc ID Rev

3 STEVAL-ISVV Figure. STEVAL-ISVV output sensing and relay board schematic U VGRID J8 OMRON V cc, A, NO, unipolar, ty pe.- U J J + V J Relay Control B grid volatge MES. CON CON VGRID C C R k W antinduttiva LEM LV-P VS HT+ HT- p, V grid v olatge MES. - V + V C p, V.n, Vac M + - R.W, % Serie UPW,NeOhm C n, V C9 u V C n, V C u, V C n, V R k J9 COUPLING INDUC TOR CONNECTOR TO GRID PHASE C n, V OUTPUT C ONNECTOR TO GRID NEUTRAL + V TO LEM SENSOR WITH.mm^ ( TURNS) WIRE D9 N8 + V CONNECTION OF L: LCL FI LTER IN DUCTOR C.uF, V R J da. a. /W R Q BCB.k Relay Control CON + V D N8 CONNECTION OF L: LCL FI LTER IN DUCTOR R Q BCB.k + V - V + V L9CDT-TR D PAK + V U Vdc VIN VOUT C C C9 C8 n, V n, V CON n, V n, V CS HAIS -P 9 9 GRID Current MES V out Vref n J C C nf V C C U TL/TO C C C p, V + V B.nF V u V nf V u, V R.k % n, V n, V C8 GRID C urrent MES. Doc ID Rev /

4 STEVAL-ISVV Figure. STEVAL-ISVV AC voltage measurement circuit schematic + Analog R 8 AC LINE VOLTAGE SENSOR R UC 8 TS9IPT TESTPOINT_S ADC_LINE_VOLTAGE J B R k _Analog _Analog _Analog Figure. STEVAL-ISVV line current conditioning circuit schematic +V + Analog + Analog AC LINE CURR ENT SENSOR C nf J9 B R K + - UA TS9IPT _Analog R9 K + - UB TS9IPT ADC_LINE_CURRENT R8 R.k _Analog _Analog _Analog _Analog R k / Doc ID Rev

5 STEVAL-ISVV Figure. STM microcontroller circuit schematic SCLK (DAC) DATA IN (DAC) J R k R 9 R RESET# NRST k 8p JUMPER_ J C8 Y.8Khz -88 8p 8p 8p 8p 8p 8p C C C C C C nf PC OSC_IN C9 uf C C8 pf pf ADC_LINE_CURR ENT ADC_LINE_VOLTAGE ADC_PANEL_CURR ENT ADC_PANEL_VOLTAGE ADC_BUS_VOLTAGE A_DAC A_DAC L BLMPGSNL R R k nf C8 pf C9 8Mhz pf C PG 9 PG 8 PG PG PG PG PG9 9 PG8 9 PG 9 PG 9 PG 89 PG 88 PG 8 PG PG PG PF PF PF PF 9 PF PF PF9 PF8 9 PF 8 PF PF PF PF PF PF PF 8 PE PE PE PE PE PE PE9 9 PE8 8 PE PE PE PE PE PE PE PE 8 PD 8 PD 8 PD 8 PD 8 PD 9 PD 8 PD9 PD8 PD PD 9 PD 8 PD PD PD PD PD PF D D D D9 D8 D D D PE D 8 9 D[-] PD D PD9 D PD8 D VBAT VREF+ VREF- R STMFZET VSS_A VDD_A VDD_ VDD_ VDD_9 8 VDD_8 VDD_ 9 VDD_ VDD_ VDD_ VDD_ 8 VDD_ 9 VDD_ V U PA RELAY-GRID PA-WKUP PA TIM_CH PHASE SHIFT PA PA TIM_CH PHASE SHIFT+DT PA PA PA SPI_SCLK PA PA SPI_MISO PA PA SPI_MOSI PA PA PA9 TIM_CH PA8 PA9 PA PA PA JTAG PA PA JTAG 9 PA PA JTAG PA PA PB TIM8_CHN PB TIM8_CHN PB PB BOOT 8 PB PB PB PB PB USART_TX PB PB USART_RX PB 9 PB PB8 PB LDAC (DAC) 9 PB9 PB SY (DAC) PB PB ENABLE (DAC) PB PB PB TIM_CHN PB PB PB PC 8 PC 9 PC PC PC 9 PC 9 PC 98 PC 99 PC8 PC9 PC PC PC PC-ANTI_TAMP PC-OSC_IN PC-OSC_OUT 8 BOOT NOT CONNECTED OSCIN Y OSC_IN OSCOUT OSC_OUT VSS_ VSS_ VSS_9 VSS_8 VSS_ VSS_ VSS_ VSS_ VSS_ VSS_ VSS_ V CON PC OSC_OUT J JUMPER_ RELAY_GRID PWM_V PWMN_V PWM_V TMS/SWDIO TCK/SWCLK TDI PWMN_V PWMN_V TDO/SWO TRST TX_ RX_ LDAC (DAC) SY (DAC) ENABLE (DAC) PWM_V PWM_V PWM_V V RESET V V nf nf C C C C C C C9 nf C V PC ADC_IN PC ADC_IN PC ADC_IN PC ADC_IN PC ADC_IN PC ADC_IN PC PC TIM8CH PC8 TIM8CH C nf nf C C nf C nf C 8p 8p 8p 8p 8p nf C nf C nf C nf C V VREF+ PG KEY-UP KEY-UP PG KEY-LEFT KEY-LEFT PG KEY-RIGHT KEY-RIGHT PG FSMC_NE FSMC_NE PG8 USER-BUTTON USER_BUTTON PG KEY-CENTER KEY-CENTER R D[..] PD D PD D PD FSMC-NWE FSMC_NWE PD FSMC-NOE FSMC_NOE PD KEY-DOWN KEY-DOWN PD D PD D D[-] V VDDA B CONNECTOR A V V Doc ID Rev /

6 STEVAL-ISVV Figure. DC-DC converter driver circuit schematic PWM PWM C u V R R R R R D V W D V W U A Y A Y A Y VCC A Y A Y A Y MHC T IC HCPL VO V L C8 u V V L C u V D STTHL IC L8D LIN VBOOT SD HVG HIN OUT VCC DIAG CIN LVG 9 S 8 D STTHL IC L8D LIN VBOOT SD HVG HIN OUT D.V mw V L VCC DIAG CIN LVG 9 S 8 C.u V C9.u V R R8 Q9 SD88 Q SB V L Q SD88 Q SB R G SOURCE MOS HIGH GN SOURCE MOS LOW SOURCE MOS HIGH SOURC E MOS LOW R k 9 8 R k V DC/ DC R PWMY IC HCPL VO D.V mw V L V DC/D C R PWMY V DC/ DC Q SD88 DCDC L NMVSA Q SB G V V DC/D C V DC/D C C n V C n V PWMY PWMY V L C u V V L C n C n V C n V V L Q SD88 Q SB GN DCDC L NMVSA V C n V C n V / Doc ID Rev

7 STEVAL-ISVV Figure. DC-AC converter driver circuit schematic IC8 HCPL VO D.V C n IC IN VREF FAULT COFF LVOFF D TD V R SOURC E IGBT HIGH C C V L SOURCE IGBT LOW n V p V R OUTH.k % GN R9 OUTL - V L CLAMP 9 C 8 n V C9 SOURC E IGBT LOW R8.k % V H R R k SOURC E IGBT HIGH D9 TD V V H C C n V SOURC E IGBT HIGH p V G R OUTL - V H C9 8 n V C88 C89 uf V SOURC E IGBT HIGH R D DESAT k W-% VH STTHA C9 SOURCE IGBT LOW uf V p V SOURC E IGBT HIGH R D9 DESAT k -% VH STTHA C p IC9 HCPL IC HCPL VO VO D8.V C n IC IN VREF FAULT COFF LVOFF SOURCE IGBT LOW R D DRAIN IGBT HIGH DESAT STTHA VH k W-% OUTH R CLAMP 9 C8 8 n V C9 uf V C 8 n V C9 uf V C p C p V L R R k R8 k % R9 k % IC IN VREF FAULT COFF LVOFF D TD V uf V uf V SOURCE IGBT HIGH C9 uf V p V DRAIN IGBT HIGH R DESAT k -% STTHA VH C V L n V C R OUTH GN R OUTL - V L CLAMP 9 SOURC E IGBT LOW D IC HCPL VO C9 p R8 D.V C n SOURCE IGBT HIGH.k % V H R R k IC IN VREF R k % FAULT COFF LVOFF D TD V R k % C8 uf V C V H n V C R OUTH G R9 OUTL - V H CLAMP 9 SOURC E IGBT HIGH R.k % D.V C8 n V L SOURCE IGBT LOW R PWM R k V V SOURCE IGBT HIGH V H - V H V V PWMN SOURC E IGBT LOW V L - V L PWM V SOURCE IGBT HIGH V H - V H PWMN V SOURCE IGBT LOW V L - V L DCDC L NMDS DCDC LN NMDS V DC/AC C V DC/AC C n V DCDC LN NMDS V DC/AC C n V DCDC L NMDS n V V V DC/ AC C9 n V V Doc ID Rev /

8 STEVAL-ISVV Figure 8. V, A flyback converter with VIPERHN schematic 8/ Doc ID Rev

9 STEVAL-ISVV Figure 9. Multi-output flyback converter with VIPERHN schematic Doc ID Rev 9/

10 Revision history STEVAL-ISVV Revision history Table. Document revision history Date Revision Changes -Mar- Initial release. -Oct- Updated IGBT part numbers in Figure : STEVAL-ISVV power stage circuit schematic on page from STGWWD to STGWHFWD. Minor changes to placement and font sizes of component labels in all schematic diagrams to improve readability. / Doc ID Rev

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