Photovoltaic controller calibration method and system

Abstract

The invention relates to a photovoltaic controller calibration method and a photovoltaic controller calibration system. The photovoltaic controller calibration method comprises the following steps that the calibration system carries out self-inspection; a photovoltaic controller is loaded; a voltage of a storage battery is calibrated; a photovoltaic voltage is calibrated; a photovoltaic charging current is calibrated; a loading current is calibrated; the photovoltaic controller is unloaded. After self-inspection of the calibration system shows each checked equipment normally works, the steps of calibrating the voltage of the storage battery, the photovoltaic voltage, the photovoltaic charging current and the loading current are sequentially carried out. The photovoltaic controller calibration system comprises a computer, a calibration power supply, an auxiliary power supply, an electronic load, a standard light source, a communicator, a power meter, an on-off controller, a plurality of relays and a diode and is also provided with a cooling fan for preventing a temperature rising effect, which is caused by a large current, on a PCBA (Printed Circuit Board Assembly) board and components. According to the calibration method disclosed by the invention, the steps of calibration can be reduced, time is saved, calibrating efficiency is obviously improved, and different conditions in the calibrating process can be properly handled, so that calibration accuracy is improved.

Description

technical field [0001] The invention relates to the field of solar photovoltaic technology, in particular to a photovoltaic controller calibration method and a calibration system thereof in a solar photovoltaic power generation system, which improves the calibration accuracy and efficiency of the photovoltaic controller. Background technique [0002] Photovoltaic controller is the key equipment in the photovoltaic power generation system, and it is widely used in wind-solar hybrid street lights, solar street lights, solar garden lights, and new rural street lights. In order to improve the cost performance of photovoltaic controllers, the method of secondary calibration is generally used to solve the measurement problems of battery voltage, photovoltaic voltage, photovoltaic charging current and load current. Therefore, the calibration and adjustment of the measurement parameters of the photovoltaic controller has become a very important production process in the production p...

AI Technical Summary

Problems solved by technology

[0007] However, when calibrating the photovoltaic charging current and load current, often due to the large current, the PCBA board and components will have a temperature rise effect due to the temperature rise, making the measured value continue to increase, which will bring disadvantages to the calibration, and even cause serious disturbance

[0008] In addition, during calibration, due to the influence of factors such as large differences in components, the actual measured value will also have a large deviation. If the coefficient K and zero point Z are adjusted strictly according to the above linear transformation formula, there will often still be large measurement error

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