PID inhibition device of bipolar type photovoltaic array system

Abstract

The invention provides a PID inhibition device of a bipolar type photovoltaic array system. The PID inhibition device comprises a control cabinet, a first circuit breaker QF1, a second circuit breaker QF2 and an interlocking device, wherein four wire inlet ports and three wire outlet ports are formed in the control cabinet; four channels are formed in each of the first circuit breaker QF1 and the second circuit breaker QF2; the interlocking device is mounted inside the control cabinet and is used for controlling the first circuit breaker QF1 and the second circuit breaker QF2 to be in an interlocked state. By adopting the PID inhibition device of the bipolar type photovoltaic array system, the PID phenomenon can be effectively inhibited, a conventional device does not need to be transformed, the cost is relatively low, and a manual mode and an automatic mode are available.

Description

technical field [0001] The invention relates to an optimization device for a photovoltaic array system, in particular to a PID suppression device for a bipolar photovoltaic array system. Background technique [0002] With the changes in the world's energy structure, photovoltaic power generation has increasingly become a hot spot for in-depth research and vigorous development in various countries. PID (Potential Induced Degradation, Potential Induced Degradation) phenomenon or surface polarization (Surface Polarization) is currently an unfavorable factor in the photovoltaic industry that affects the efficient use of crystalline silicon solar cell components. When the photovoltaic module is in normal use, there is a positive or negative voltage to the ground in the system, which causes the accumulation of surface charges on the module and causes power attenuation. In a short period of time such as a few months or a year or two, the output power of the module decreases sharply...

AI Technical Summary

Problems solved by technology

When the photovoltaic modules are in normal use, there is a positive voltage or a negative voltage to the ground in the system, which causes the accumulation of charges on the surface of the modules and causes power attenuation. In a short period of time such as a few months or a year or two, the output power of the modules decreases sharply.

For the unique PID phenomenon of photovoltaic arrays, a layer of silicon dioxide coating with holes can be added on the surface of the battery or between the passivation layer and the battery to form a conduction circuit to prevent harmful polarization, but this method increases the cost of battery manufacturing. cost and to some extent reduces the efficiency of the battery

You can also use resistors to change the voltage of components in the system to ground or use positive grounding modules and inverters with isolation transformers, but this method limits the use of photovoltaic modules, and the isolation transformer increases the cost and reduces the system efficiency

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