超级电容恒功率充放电控制系统研究

发布时间：2018-04-29 10:11

本文选题：超级电容 + 恒功率　；参考：《大连理工大学》2015年硕士论文

【摘要】：随着社会经济高速发展,能源危机也日益逼近,因此对新能源的探索和新储能技术研究显得日益迫切。目前,风电、核电和光伏发电等新能源的探究已取得初步成效,但新能源的高效利用和并网运行方面还存在技术瓶颈,于是对新储能技术方面的研究迫在眉睫。与传统的储能载体蓄电池相比,.超级电容在循环寿命和充放电效率等方面有着显著的优势。如何进一步提高超级电容器能量的高效利用和转换成为了迫切关注的问题,本文针对上述问题,对超级电容器的恒功率充放电控制系统展开研究。论文首先结合双管正激电路对系统结构方案进行设计,并对恒功率系统工作原理进行分析。针对双管正激电路在充电和放电模式下的工作特点,对其电路分别进行等效简化,并结合开关管的工作时序对等效电路的各个工作模态进行详细分析,通过分析为系统平均开关模型建立提供理论依据。其次,结合恒功率主拓扑电路的电流峰值控制(CPM)策略对其稳定性进行分析。针对电路在占空比D50%的情况,提出了在恒功率系统中加入斜坡补偿的控制策略,并对补偿后的系统建立了平均开关模型。然后在Matlab/Simulink下对系统进行仿真,并对补偿前后系统仿真波形进行对比,从而验证系统在补偿后的启动特性和扰动特性有了很大改善,并且达到了恒功率充放电的控制目标。最后,搭建了系统实验平台。在硬件设计方面,对系统的主电路、IGBT驱动电路、斜坡补偿电路、电压和电流采样电路及其信号调理电路进行设计。在软件设计方面,对系统主程序、ADC采样子程序、工作模式选择子程序、充电和放电子程序进行设计。通过实验平台在不同功率点处对超级电容进行测试可知,系统达到了预期的控制目标。
[Abstract]:With the rapid development of social economy, the energy crisis is approaching day by day, so the exploration of new energy and the research of new energy storage technology are becoming more and more urgent. At present, the exploration of new energy, such as wind power, nuclear power and photovoltaic power generation, has made initial achievements, but there are still technical bottlenecks in efficient utilization and grid-connected operation of new energy sources, so it is urgent to study new energy storage technology. Compared with the traditional energy storage carrier battery. Super capacitors have significant advantages in cycle life and charge / discharge efficiency. How to further improve the energy utilization and conversion of supercapacitors has become an urgent concern. In this paper, the constant power charge and discharge control system of supercapacitors is studied. In this paper, the structure of the system is designed based on the dual-transistor forward circuit, and the working principle of the constant power system is analyzed. In view of the working characteristics of dual-transistor forward circuit in charge and discharge mode, the equivalent simplification of the circuit is carried out, and the working modes of the equivalent circuit are analyzed in detail in combination with the working sequence of the switch tube. The analysis provides a theoretical basis for the establishment of the system average switch model. Secondly, the stability of CPM is analyzed by using CPM strategy of constant power main topology circuit. For the case of 50% duty cycle, a slope compensation control strategy is proposed for the constant power system, and an average switching model is established for the compensated system. Then the system is simulated under Matlab/Simulink, and the simulation waveform before and after compensation is compared, which verifies that the start-up and disturbance characteristics of the system after compensation have been greatly improved, and the control goal of constant power charge and discharge has been achieved. Finally, the system experimental platform is built. In the aspect of hardware design, the main circuit of the system, IGBT driving circuit, ramp compensation circuit, voltage and current sampling circuit and signal conditioning circuit are designed. In software design, the main program of system ADC sampling subroutine, working mode selection subroutine, charging and releasing electronic program are designed. By testing the super capacitor at different power points on the experimental platform, the system achieves the desired control goal.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM53

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