Distributed photovoltaic module string and module IV characteristic curve on-line measurement system

Abstract

The invention relates to a distributed photovoltaic module string and module volt-ampere (IV) characteristic curve on-line measurement system, which comprises a photovoltaic module wireless voltage sensor, a photovoltaic subarray IV curve scanning module and an upper computer data management center. The photovoltaic module wireless voltage sensor is used for measuring module voltage, is powered by a super-capacitor and a photovoltaic module, and transmits voltage data to the IV curve scanning module through a wireless sensor network; the IV characteristic curve scanning module carries out time-sharing IV curve scanning on each module string, triggers the voltage sensor of a module to acquire synchronous voltage data so as to realize module IV curve scanning, and transmits IV data of the modules and the module strings to the upper computer data management center. The distributed photovoltaic module string and the module volt-ampere (IV) characteristic curve on-line measurement system provided by the invention can acquire accurate photovoltaic module string and module IV characteristic curve data on-line and in real-time, so that the efficiency and the accuracy in testing, evaluating and diagnosing a photovoltaic power generation array are effectively improved.

Description

technical field [0001] The invention relates to the field of detection of photovoltaic power generation arrays, in particular to an online measurement system for distributed photovoltaic strings and component IV characteristic curves. Background technique [0002] Since photovoltaic modules and arrays are installed and working in a complex outdoor environment, and are affected by various environmental factors such as thermal cycles, high humidity, ultraviolet rays, and wind excitation, local material aging, performance degradation, cracks, open circuits or short circuits are prone to occur And other faults, the occurrence of faults will reduce the power generation efficiency of the power station, and even cause fires in severe cases, endangering the safety of social property. To reduce the cost of photovoltaic power generation and improve the safety during the operation of the power station, timely, effective and efficient detection of photovoltaic power stations is very imp...

AI Technical Summary

Problems solved by technology

[0005] At present, the distributed photovoltaic IV characteristic curve online measurement system based on the two-level wireless sensor network proposed by the present invention has not been seen in the published literature and patents.

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