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Novel anti-PID device

A new type of controller technology, applied in circuit devices, photovoltaic power generation, AC network circuits, etc., can solve problems such as cell fill factor, open circuit voltage and short circuit current reduction, component power attenuation, etc., to achieve suppression of PID effect and low power consumption , The effect of prolonging the life of the system

Pending Publication Date: 2019-04-12
NINGBO GINLONG TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

The PID effect will reduce the fill factor, open circuit voltage and short circuit current of the cell, and greatly reduce the power of the module

Method used

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Embodiment Construction

[0016] as attached figure 1 As shown in the system connection block diagram of the present invention, a novel anti-PID device is powered by a three-phase grid, connected to the AC output end of the inverter 2 power supply, and constructs a virtual midpoint through the inductance L and the resistance R, and the anti-PID controller 3 The output is connected between the virtual midpoint and the ground to provide isolated high-voltage output, sampling power supply and logic comparison level, etc. When the inverter is connected to the grid, the anti-PID controller raises the voltage of the virtual midpoint to ground, The ground voltage of the PV battery panel 1 rises immediately, which can greatly suppress the occurrence of the PID effect.

[0017] as attached figure 2 As shown in the internal structural block diagram of the anti-PID controller, the described anti-PID controller 3 includes a power module 31, an output module 32 and a logic module 33, and the power module 31 provi...

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Abstract

The invention discloses a novel anti-PID device. The novel anti-PID device adopts a three-phase power grid for power supply, and is characterized by being connected with an AC output end of a power supply of an inverter; a virtual midpoint is constructed through inductance and resistance; output of an anti-PID controller is connected between the virtual midpoint and the ground to provide isolationvoltage output, sampling power supply and logic comparison level; the anti-PID controller increases voltage to ground of the virtual midpoint; when the inverter is connected to the grid, the voltageto ground of a PV battery panel is increased, so as to inhibit the generation of a PID effect. The device has the advantages of inhibiting the PID effect and being low in power consumption and good instability, accords with safety standard requirements, and is capable of greatly enhancing the power generation efficiency of photovoltaic grid-connected systems and prolonging the service life of thesystems.

Description

technical field [0001] The invention relates to a novel anti-PID device for suppressing the PID effect of a PV battery panel. Background technique [0002] Solar power is an emerging renewable energy technology. PV panels, inverters, power grids and other necessary supporting components of photovoltaic power generation systems are essential components of photovoltaic power generation, among which factors such as efficiency, life, and stability are particularly important. With the increasingly widespread and in-depth application, the longer the industry's precipitation time, it will be found that there is a PID effect in photovoltaic panels. The PID effect will lead to a reduction in the fill factor, open circuit voltage, and short circuit current of the cell, and a significant attenuation of the module power. For this reason, how to improve the PID effect has become an important topic in the photovoltaic power station industry. Since the PID effect is reversible, it can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/383Y02E10/56
Inventor 王一鸣岳程鹏
Owner NINGBO GINLONG TECH
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