一种用于热电能量采集自供电无线传感器网络节点的MPPT方法

本发明公开了一种适用于热电能量采集自供电无线传感器网络(WSNs)节点的基于线性外推的直接调节和观察自寻优MPPT方法。该MPPT方法包括粗调和细调两步，先利用直接调节法进行粗调，然后用观察自寻优法进行细调。所述直接调节法首先通过仿真获得DC-DC升压电路和WSNs节点总阻值R与DC-DC升压电路开关管控制PWM信号的占空比D之间的函数关系D(R)；然后，基于D(R)构建直接调节法MPPT控制模块，计算所需PWM信号的占空比D。所述观察自寻优法首先利用线性外推法计算TEG内阻Rin，然后通过测量电压、电流，计算DC-DC升压电路和WSNs节点等效电阻R，之后计算功率情况参数λ(λ＝R/Rin)...

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Bibliographic Details
Format Patent
LanguageChinese
Published 02.09.2022
Subjects
CONTROLLING
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
GENERATION
PHYSICS
REGULATING
SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
WIRELESS COMMUNICATIONS NETWORKS
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Summary:本发明公开了一种适用于热电能量采集自供电无线传感器网络(WSNs)节点的基于线性外推的直接调节和观察自寻优MPPT方法。该MPPT方法包括粗调和细调两步，先利用直接调节法进行粗调，然后用观察自寻优法进行细调。所述直接调节法首先通过仿真获得DC-DC升压电路和WSNs节点总阻值R与DC-DC升压电路开关管控制PWM信号的占空比D之间的函数关系D(R)；然后，基于D(R)构建直接调节法MPPT控制模块，计算所需PWM信号的占空比D。所述观察自寻优法首先利用线性外推法计算TEG内阻Rin，然后通过测量电压、电流，计算DC-DC升压电路和WSNs节点等效电阻R，之后计算功率情况参数λ(λ＝R/Rin)，再按照λ值所在区间对PWM的占空比D进行调节。所述基于线性外推的直接调节和观察自寻优MPPT方法能在保证输出功率的情况下，有效地提高了追踪速率，克服了传统MPPT方法的缺点，在保证稳定性的情况下兼顾了最大功率追踪的快速性和高效性。 The invention discloses a direct adjustment and observation self-optimization maximum power point tracking (MPPT) method based on linear extrapolation and suitable for a thermoelectric energy collection self-powered wireless sensor networks (WSNs) node. The MPPT method comprises the two steps of rough adjustment and fine adjustment, wherein the rough adjustment is performed by a direct adjustmentmethod, and then the fine adjustment is performed by an observation self-optimization method. The direct adjustment method comprises the following steps offirstly, acquiring a function relationship D(R) betwe
Bibliography:Application Number: CN201910597364