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摘要目前，能源问题与环境问题是制约人类发展的两大难题。太阳能清洁无污染、储量丰富，是理想的新能源。光伏逆变器是光伏逆变系统的核心，起着传输功率和直流电转化为交流电的作用，研究逆变器的控制策略对提高转换效率和改善电压电流波形十分必要。光伏逆变器常用的控制策略有电压电流双闭环控制、重复控制、无差拍控制、空间矢量控制等。本文主要对电压电流双闭环控制进行研究。25262
- 上一篇：电动汽车电池剩余电量SOC估计算法的研究
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传统的双闭环控制策略主要采用三角波调制方式，本文在此控制策略基础上，采用内环为电流滞环的控制方式，并进行优化设计，以提高逆变器的动态响应特性和电流跟踪特性。本文基于DSPACE半实物仿真实验平台，搭建MATLAB仿真实验模型，对文中提出的控制策略的有效性与可行性进行快速、高效的实验验证。
关键词 光伏逆变器 滞环控制策略 电压电流双闭环 DSPACE
毕业论文设计说明书外文摘要
Title The Simulation and Implementation of Photovoltaic Inverter Based on DSPACE
Abstract
Energy crisis and environmental pollution are two major problems for human beings. As a clean and permanent energy resource, the solar energy has been generally recognized. In the photovoltaic systems, the inverter is the core part, which transmits power and switches AC to DC. To increase conversion efficiency and improve voltage and current waveforms , it is necessary to study the control strategies of inverter. There are several commonly used control strategies of inverter, such as voltage and current double closed-loop control, repetitive control, deadbeat control and space vector control and so on. This paper focus on voltage and current double closed-loop control.
Traditional double closed-loop control is based on triangle wave modulation method. This paper presents a sort of improved control method which is based on hysteresis control. MATLAB simulation results showed that the method is effective. DSPACE is an experiment platform for semi-physical simulation, which can be used to verify the effectiveness of the control method quickly and efficiently .The control strategies of the photovoltaic inverter were analyzed utilizing DSPACE platform.
Keywords PV inverter hysteresis double closed-loop control DSPACE
目 次
1 绪论 1
1.1 研究背景及意义 1
1.2 光伏发电系统介绍 1
1.3 DSPACE实时仿真系统介绍 3
1.4 本课题研究的内容 5
2 光伏逆变器 6
2.1 光伏逆变器的拓扑结构 6
2.2 逆变器控制策略 8
2.3 PWM控制技术 9
2.4 本章小节 11
3 基于三角波调制的双闭环逆变器 13
3.1 单相全桥逆变器建模 13
3.2 LC滤波器设计原理 15
3.3 比例积分微分的作用 17
3.4 双闭环PI参数的设计 17
4 基于滞环控制的双闭环逆变器 21
4.1 滞环控制的建模与设计 21
4.2 两态与三态滞环电流控制 24
4.3 固定环宽与固定频率滞环控制 27
5 设计与仿真 30