【作者】 李洋；

【导师】 樊生文；

【作者基本信息】 北方工业大学 ， 电力电子与电力传动， 2013， 硕士

【摘要】 本课题是小功率风力发电等新能源从产生到被利用环节中重要的一环。它的功能是将风能产生的能量,通过升压和逆变调制技术,转换成可供用户使用的交流市电。离网型风力发电系统与并网型风力发电系统不同之处在于,离网型风力发电产生的电能不需要与公共电网相连,产生的电能通过逆变器为用户供电。即使在短时间没有能量输入的时候,也能够通过逆变器将蓄电池电能逆变成交流电以供用户使用。而并网型一般没有存储环节,在有足够能量输入,并在条件允许的时候完成并网；没有能量输入或者并网条件不满足的时候则与电网断开。作为离网型风力发电环节中不可或缺的一环,逆变器变得尤为重要。本课题主要研究对象是离网型风力发电的逆变器。设计研制的逆变器具备两个重要的环节,即升压环节和逆变环节。升压环节将蓄电池12V电压通过推挽升压电路产生400V-500V的高压直流电,再经过全桥逆变,在正弦脉冲宽度调制(SPWM)下生成225V交流电。该逆变器由主电路和控制电路两个部分组成。主电路包括辅助电源部分、推挽升压部分,高压整流和逆变部分、以及输出的LC滤波环节等。控制电路主要包括前级升压控制以及后级逆变控制,两个环节分别由两个控制器分别完成,并通过光耦实现隔离和相互通信。系统前级控制由P1C16F684单片机完成,实现系统的推挽输出和电池电压检测功能。后级控制由ARM公司的STM32F107处理器完成电压逆变、各种参数的检测,一改以往由数字信号处理器(DSP)完成的功能。该控制器具有良好的性价比和操控性。价格远比DSP低廉,但性能却不逊于它。是实现复杂算法和控制的不错选择。该逆变系统具有完善的保护机制。包括电池欠压保护、高压过压保护、输出过流保护等。这些保护机制会使得逆变器在过载时或者发生故障的时候迅速封锁前级PWM信号,切断能量源,保护逆变器和用电设备的安全。实验证明,该逆变器具有较高的工作稳定性和较高的作效率,能够较好的实现逆变功能,具有广阔的应用前景。更多还原

【Abstract】 This topic is an important part of new energy such as small wind power energy from generation to take advantage. Its function is to generate the AC voltage available for the user by the modulation technology boost and inverter through the low voltage DC power produced by renewable energy.The difference between off grid wind power and grid-connected wind power is that off-grid wind power generated electricity do not need to be connected to the public grid, the generated electricity is stored in the memory unit, after the inverter power supply for the user. In short, when there is no energy input, battery power can be change into AC power for use by the inverter. Grid-connected inverter is no battery, if there is enough energy, it can connect to the grid.Inverter is a very important part of off-grid wind power. This topic has two important parts, one is the boost, and the other is the inverter. The12V DC will be boost to about400V DC, and though inverter, under the SPWM, we can achieve the220AC.The Inverter has two parts, one is power circuit, and the other is control circuit. The power circuit includes auxiliary power, push-pull boost, high voltage rectifier, and inverter, etc... The control circuit includes boost control and inverter control. There are two controllers in the controls circuit. The communication between the two parts can be finished by optical coupling.The controller PIC16F684finishes push-pull and battery voltage detection. The controller STM32F107producted by ARM can finish the work of voltage detection and circuit detection. The STM controller has good cost performance and handling and it is cheaper than DSP, but it performance is not bad. It is a good choose to finish control and calculation.The controller has good protection such as battery undervoltage protection, high-voltage overvoltage protection, output over-current protection and so on. These protections can insure the equipment safe when any faults happened by seal off the wave.Experimental proof that the inverter has good stability and high efficiency, and it can achiece the inverter function very well and it has widly used areas.更多还原