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A photovoltaic inverter system and its pid effect compensation method and device

A photovoltaic inverter and compensation device technology, applied in the monitoring of photovoltaic systems, photovoltaic power stations, photovoltaic power generation, etc., can solve the problems of photovoltaic module repair, high cost, etc.

Active Publication Date: 2019-04-09
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology

[0005] The invention provides a photovoltaic inverter system and its PID effect compensation device and method to solve the problems in the prior art that the cost is high and the photovoltaic modules that have PID effect cannot be repaired

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  • A photovoltaic inverter system and its pid effect compensation method and device
  • A photovoltaic inverter system and its pid effect compensation method and device
  • A photovoltaic inverter system and its pid effect compensation method and device

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Embodiment Construction

[0054] In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0055] The present invention provides a photovoltaic inverter system and a PID effect compensation device and method to solve the problems in the prior art that the cost is high and the photovoltaic components that have PID effects cannot be repaired.

[0056] Specifically, the PID effect compensation method of the photovoltaic inverter system is applied to the PID effect compensation device of the photovoltaic inverter system. For the PID effect compensation device of the photovoltaic inverter system, see figure 2 , including: a DC voltage sampling unit 101, a processing control unit 102, an isolated AC / DC conversion unit 103 and a switching protection unit 104; for the PID effect compensation method of the photovoltaic inverter sys...

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Abstract

The invention provides a photovoltaic inverter system and its PID effect compensation method and device. By processing the records of the operating conditions of each photovoltaic module and the judgment of the PID effect compensation conditions by the processing control unit, the compensation voltage is optimized and calculated, and then the integrated PID is controlled. The compensation device compensates for the PID effect of the photovoltaic module to realize the compensation and repair of the PID effect, which can effectively solve the attenuation problem of the photovoltaic module in the photovoltaic power station and increase the power generation of the system. Compared with the existing technical solutions, its actual operation reliability is high and maintenance low cost.

Description

technical field [0001] The invention relates to the technical field of PID effect compensation, in particular to a photovoltaic inverter system and a PID effect compensation device and method thereof. Background technique [0002] The PID (Potential Induced Degradation, Potential Induced Degradation) effect refers to a kind of output performance degradation that occurs when the output of the photovoltaic module (ie, the input of the photovoltaic inverter system) is subjected to a high negative bias voltage to the metal frame. The phenomenon is mainly manifested in the decrease of component open circuit voltage, short circuit current and fill factor. In recent years, with the vigorous development of photovoltaic grid-connected power generation systems, the string input voltage configuration of photovoltaic inverter systems has become higher and higher, and the 1500V system is gradually being popularized and applied. Since the metal frame of photovoltaic modules is generally ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/381H02J2300/24H02J3/46H02S10/00H02S50/10Y02E10/56G05F1/10H02S40/32
Inventor 汪昌友孙维李必杰
Owner SUNGROW POWER SUPPLY CO LTD
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