文档介绍：基于TMS320F28335的光伏并网模拟发电装置
摘要:本装置采用单相桥式DC-AC逆变电路结构,以TI公司的浮点数字信号控制器TMS320F28335 DSP为控制电路核心,采用规则采样法和DSP片内ePWM模块功能实现SPWM波。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。采用DSP片内12位A/D对各模拟信号进行采集检测,简化了系统设计和成本。本装置具有良好的数字显示功能,’’彩色液晶TFT LCD非常直观地完成了输出信号波形、频谱特性的在线实时显示,以及输入电压、电流、功率,输出电压、电流、功率,效率,频率,相位差,失真度参数的正确显示。本装置具有开机自检、输入电压欠压及输出过流保护,在过流、欠压故障排除后能自动恢复。
关键字:逆变,SPWM,最大功率点跟踪MPPT,锁相,DSP
        
Photovoltaic Grid-connected Inverter
Abstract:The Photovoltaic grid-connected inverter took TMS320F28335 DSP as core of the controller, used single-phase bridge as the topology structure and generated SPWM wave with the on-chip ePWM module according to symmetric regular sampling method. By CVT method and Digital PLL, the system achieved the maximum power point tracking (MPPT) and signal synchronization respectively. Through the on-chip 12bit A/D converter, TMS320F28335 measured the analog signals, which largely simplified the system design and reduced the cost. The system was embedded with the digital display module. Taking CPLD to drive the ” TFT LCD, the system can display the real-time output signal waveform, the spectral characteristics as well as other parameters, including the input voltage, current, power, the output voltage, current, power, the efficiency, the frequency, the phase the THD. Over-current, over low voltage protection and the automatically recover were realized as well.
Key Words:inverter,SPWM,MPPT,Phase-lock,DSP
目录
1 引言 5
2 系统指标 5
3 方案比较与论证 6
主电路拓扑 6
正弦脉冲宽度调制SPWM的方案 7
4 理论分析与计算 8
最大功率点跟踪MPPT的控制方法与参数计算 8
同频、同相的控制方法与参数计算 9
提高效率的方法 9
滤波电路设计和计算 10
5 系统结构 11
系统总体结构 11
显示驱动结构 12
模拟信号调理电路结构 12
6 系统硬件设计 13
主电路及驱动 13
DSP处理器电路 13
模拟信号调理电路 13
系统电源设计 16
显示电路设计 18
抗干扰措施 18
7 系统软件设计 18
18
21
23
8 系统关键设计与创新 23
9 测试方案与测试结果 24
测量仪器 24
测量方案 24
基础要求性能测试 24
发挥部分性能测试 25
测试结果汇总 26
测试结果分析 27
10 附录 27
引言
新能