基于占空比的无电流传感器最大功率点跟踪系统

摘要

In order to reduce the power loss of the energy collection system,a new Power Point Tracking( MPPT) system based on duty cycle is proposed. Traditional MPPT methods need to be measured by DC or open circuit voltage. The proposed scheme can achieve the maximum power extraction without the need of DC measurement. The MSP430 microcontroller is implemented, and the MPPT algorithm is adjusted to suit the characteristics of the thermoelectric generator. The lagging voltage regulator is capable of maintaining the output voltage of the thermoelectric generator at the reference level so that the maximum power can be extracted according to the given temperature condition. Experimental results show that the proposed MPPT energy collection system has simple structure,low cost,low power consumption,and can be used for all kinds of small scale sustainable power generation.%为降低能量收集系统的功率损耗，提出了一种基于占空比的无电流传感器最大功率点跟踪MPPT(Maximum Power Point Tracking)系统。传统的MPPT方法需要进行直流测量或开路电压测量，而本文提出的算法利用滞后切换信息预估发电机的输出功率，可以实现保持最大功率提取，无需进行直流测量。采用MSP430微控制器进行了实现，并调整MPPT算法以适合热电发电机的特性。滞后电压调节器能够将热电发电机输出电压维持在参考电平上，因此可以根据给定的温度条件下提取最大功率。实验分析结果表明，提出的MPPT能量收集系统结构简单、成本较低、功率损耗低，且适用于各类小规模可持续发电。