毕业论文-光伏发电系统逆变技术应用研究

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1、 1 摘 要 由于全球能源的逐渐紧张和环境污染的日益严重，清洁的可再生的太阳能越来越受到人们 是重视 11 。 太阳能既是一次能源，又是可再生能源。它资源丰富，既可免费使用，又无需运输，对环境 无任何污染。 为人类创造了一种新的生活形态， 使社会及人类进入一个节约能源减少污染的时代。 光伏板组件是一种暴露在阳光下便会产生直流电的发电装置，由几乎全部以半导体物料(例 如硅)制成的薄身固体光伏电池组成。由于没有活动的部分，故可以长时间操作而不会导致任何 损耗。简单的光伏电池可为手表及计算机提供能源，较复杂的光伏系统可为房屋提供照明，并为 电网供电。 我们主要研究光伏发电系统中的逆变电路而其中的电压

2、型单相全桥逆变电路是我们所要详 细研究的对象，.而其中本论文会涉及最大功率跟踪及 PWM 控制技术 全桥逆变电路克服了推挽电路的缺点，功率晶体管调节输出脉冲宽度，输出交流电压的有效 值即随之改变。由于该电路具有续流回路，即使对感性负载，输出电压波形也不会畸变。 几种逆变器的主电路均需要有控制电路来实现一般有方波和正弱波两种控制方式，方波输出 的逆变电源电路简单，成本低，但效率低，谐波成份大。正弦波输出是逆变器的发展趋势，随着 微电子技术的发展，有功能的微处理器也已问世，因此正弦波输出的逆变技术已经成熟。 关键词关键词：太阳能；光伏系统；逆变器技术；正弦波输出 2 Solar Photovolt

3、aic System Inverter Applications LEE Zhi-shun Abstract Due to tight global energy and environmental pollution gradually growing, clean, renewable solar energy more and more people are seriously. Solar energy is the first time, but also renewable energy. It is rich in resources, can use free of charg

4、e, and without transportation, without any pollution to the environment. For mankind to create a new life, so that social and human energy into a era of reducing pollution. Is a component of photovoltaic panels in the sun exposure will generate direct current power generation devices, from virtually

5、 all semiconductor materials (eg silicon) are made of thin photovoltaic cells composed of solid. Because there is no part of activity, and would thus be a long time operation would not lead to any loss. Simple photovoltaic cells for watches and computers to provide energy, and more complex PV system

6、s to provide lighting for the housing and power supply. we almost go deeply into the source inverter in PV systems，and the V oltage Single-Phase Full-Bridge Controlled Rectifier is the most important simple for us to research, as thus it will relate to MPPT and PWM controller technology, The bridge has push-pull inverter circuit to overcome the shortcoming, power transistor circuits of the output pulse width adjustment; the output voltage of the RMS is changed. Because of this circuit has