光伏离网并网逆变器解决方案
本套逆变器方案DC-DC采用Boost升压，DCAC采用单相全桥逆变电路结构。以TI公司的浮点数字信号控制器TMS320F28335DSP为控制电路处理器，采用规则采样法和DSP片内ePWM模块功能实现PWM和SPWM波。PV最大功率点跟踪（MPPT）采用了恒压跟踪法（CVT法）来实现，并用软件锁相环进行系统的同频、同相控制，控制灵活简单。方案本身包含原理图，PCB(Protel打开），源程序代码（CCS打开），BOM清单。
硬件方案底板主要包含各种接口，包括RS232接口，PWM接口，输出并网继电器接口，按键，LCD及开关量输出，RS485接口，LED，JTAG下载接口，CAN总线接口，核心板接口，蜂鸣器以及DAC接口等。2层板，已经覆铜，以下展示部分BOM。
| Comment | Description | Designator |
| SW-PB | Switch | B1, B2, B3, B4 |
| 104 | Capacitor | C1, C2, C3, C4, C6, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C48 |
| 332 | Capacitor | C25, C26, C27, C28, C29, C30, C31, C32, C33, C34, C35, C36, C37, C38, C39, C40 |
| 105 | Capacitor | C41, C42 |
| 10uF/16V | Bi-Polar Capacitor, Polarized Capacitor (Radial) | C43, C44, C45 |
| 331 | Capacitor | C46, C47 |
| LED | D1, D2, D3, D4, D5 | |
| 1N4007 | Diode | D6 |
| ADCA | Connector | J1 |
| ADCB | Connector | J2 |
| ST7920-12864 | J3 | |
| JUMP | Connector | J4 |
| JQ | Connector | J5 |
| DAC | Connector | J6 |
| POWER | J7 | |
| JUMP | Connector | J10 |
| RS485 | Connector | J11 |
| CAN | Connector | J12 |
| NETCON | J15 | |
| SPI | Connector | J16 |
| COM | Connector | J17 |
| JTAG | Header, 7-Pin, Dual row | JG1 |
| IDC80 | JP1, JP2 | |
| HRS2H-S-DC5V | K1 | |
| 10uH | Inductor | L1, L2, L3 |
| 7SEG | LD1, LD2, LD3 | |
| Bell | Electrical Bell | LS1 |
| RS232_B | Header, 4-Pin | P1 |
| DRIVER | Connector | P2 |
| MMBT2222A | NPN Transistor | Q1, Q2 |
| 102 | R1, R2, R4, R8, R9, R10, R13, R21, R22 | |
| 103 | R3, R5, R6, R7, R11, R12 | |
| 101 | R14, R16, R17 | |
| 201 | R15 | |
| 121 | R18, R19 | |
| 512 | R20 | |
| 0 | R23, R24, R25 | |
| 102*4 | RP1, RP2, RP3, RP4, RP5, RP6 | |
| RS232_A | Receptacle Assembly, 9 Position, Right Angle | RS1 |
| SW-DT | Connector | SW1 |
| LM358 | Fast Settling Dual Operational Amplifier | U1, U2, U3, U4 |
| TLV5620 | U9 | |
| REF3020 | U10 | |
| LM1117-3.3 | U11 | |
| MAX3232A | +5V Powered, Multi-Channel RS-232 Driver/Receiver | U12 |
| MAX485 | U13 | |
| SN65HVD235 | U14 | |
| SN74HC164 | 8-Bit Shift Register with 3-State Output Registers | U15, U16, U17 |
| 74LVXC3245 | U18 |
硬件方案--采样驱动隔离板
采样驱动板包括ACDX SPWM驱动部分，比较器LM393，MOS驱动ICIR2100，光耦6N137，LDO 78M15和78M05。此外还包含输出电压及输出电流检测部分，市电过零比较，直流输入电流检测等功能电路。PCB是2层板，以下展示部分BOM。
| Comment | Description | Designator |
| 470uF/25V | C1 | |
| 470uF/35V | Bi-Polar Capacitor | C3 |
| 104 | [NoValue], Capacitor | C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25, C26, C27, C28, C51, C52 |
| 10uF/25V | Capacitor | C29, C30, C31, C32, C33, C34, C35, C36, C37, C38 |
| 15p | Capacitor | C39, C40 |
| 47uF/16VD | Polarized Capacitor (Radial) | C41 |
| 103 | [NoValue], Capacitor | C42, C46, C47, C53, C54 |
| 100uF/25V | Bi-Polar Capacitor | C43 |
| 10uF/25VD | Capacitor | C44, C45 |
| 470uF/25V | Bi-Polar Capacitor | C48, C49 |
| 331 | Capacitor | C50 |
| 101 | Capacitor | C55, C56, C57 |
| 332 | Capacitor | C58 |
| LED | D2 | |
| UF4007 | Diode | D3, D4 |
| DC2405D-1W | DC1 | |
| POWER | Connector | J1 |
| 10uH | Inductor | L1, L2 |
| MAIN | Connector | P1 |
| DCAC | Connector | P2 |
| 5H11G | PNP General Purpose Amplifier | Q1 |
| 4H11G | NPN General Purpose Amplifier | Q2 |
| 471 | R1, R2, R3 | |
| 101 | R4, R5, R34 | |
| 100 | R6, R7 | |
| 472 | R8, R9, R33 | |
| 102 | R10, R11, R12, R13, R18 |
硬件方案--逆变板
逆变板主要是高压电路大电流电路，包括MOSFETFSW25N50A，电流传感器ACS712-05B，比较器LM358，光耦HCNR200，EMI及并网电路。PCB是2层板，可以看到基本都是大面积铺铜来实现连通，以下展示部分BOM。
| Comment | Description | Designator |
| 47uF/50V | Electrolytic Capacitor | C1 |
| 100uF/450V | Bi-Polar Capacitor | C2 |
| 105/630V | Capacitor | C3, C4 |
| 104 | [NoValue], Capacitor | C5, C6, C14, C15 |
| 103 | C7, C8 | |
| 102 | Capacitor | C9, C10 |
| 470uF/250V | Bi-Polar Capacitor | C11, C12 |
| 224/630V | Capacitor | C13 |
| 475/630V | C16 | |
| 104/630V | Capacitor, [NoValue] | C17, C18, C21 |
| 472/250V | C19, C20 | |
| MUR1560 | Diode | D1 |
| LED | D2 | |
| 1N4007 | Diode | D3 |
| LED | D4 | |
| 1N4148 | Diode | D5, D6, D7, D8 |
| FUSE | Fuse | F1 |
| JUMP | Connector | JP1, JP3, JP4 |
| PV | Connector | JP2 |
| ACOUT | Connector | JP5 |
| TRA2L-24VDC | K1 | |
| TS | Inductor | KT1 |
| 1mH | Inductor | L1 |
| 2.5mH | Inductor | L2, L3 |
| DCAC | Connector | P1 |
| FSW25N50A | Q1, Q2, Q3, Q4, Q5 | |
| MMBT2222A | NPN Transistor | Q6 |
| 914 | R1, R2 | |
| 10R | R3, R4, R5, R6, R7 | |
| 473 | R8, R9, R10 | |
| 201 | R11 | |
| 330K/1W | R12 |
硬件方案--主控板
主控板主要是主控的最小系统电路，包括了TI的DPS TMS320F28035 80pin的封装，外部512K存储器AT24C512，JTAG下载接口，复位及BOOT电路。PCB是2层板，已经覆铜，以下展示部分BOM。
| Comment | Description | Designator |
| 225 | Capacitor | C1, C2, C3, C4, C5, C6, C7, C8 |
| 104 | Capacitor | C9, C10, C11, C12, C13 |
| 10uF/16V | Polarized Capacitor (Radial) | C14, C17 |
| 22p | Capacitor | C15, C16 |
| LED | D1 | |
| PW | Connector | J1 |
| IDC80 | JP1, JP2 | |
| Header 7X2 | Header, 7-Pin, Dual row | JTAG1 |
| 10uH | L1, L2, L3 | |
| 102 | R1, R2, R3, R4 | |
| 472 | R5 | |
| 222 | R6 | |
| 103 | R7, R8 | |
| 0R | R9, R10 | |
| AT24C512 | U1 | |
| TMS320F28035-80 | U2 | |
| LM1117-3.3 | U3 | |
| 6M | Crystal Oscillator | Y1 |
软件方案
软件是DSP方案，采用规则采样法和DSP片内ePWM模块功能实现PWM和SPWM波。PV最大功率点跟踪（MPPT）采用了恒压跟踪法（CVT法）来实现，并用软件锁相环进行系统的同频、同相控制，控制灵活简单。软件工程用CCS打开。
审核编辑：汤梓红
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