Photovoltaic inverter and photovoltaic system

A photovoltaic inverter and transformer technology, applied in photovoltaic power generation, electrical components, single-grid parallel feeding arrangements, etc., can solve problems such as increasing costs

Inactive Publication Date: 2020-11-03
ALTENERGY POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, an additional shut-off device is added at the output end of the photovoltaic module to shut off the output voltage of the photovoltaic module. Although this method c

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  • Photovoltaic inverter and photovoltaic system
  • Photovoltaic inverter and photovoltaic system
  • Photovoltaic inverter and photovoltaic system

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Embodiment Construction

[0034] The core of the present invention is to provide a photovoltaic inverter and a photovoltaic system, which meet the requirements of safety regulations, and have a simple structure and low cost.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] The present invention provides a photovoltaic inverter, please refer to figure 1 , figure 1 It is a structural schematic diagram of a ...

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Abstract

The invention discloses a photovoltaic inverter which comprises a flyback converter, an inverter circuit, an alternating voltage detection module and a control module. Specifically, the flyback converter firstly boosts the first direct current output by a photovoltaic module, so that the inverter circuit can invert the boosted second direct current and input the second direct current into an alternating current power grid. The flyback converter realizes multiplexing of the primary side main switch tube and the short circuit switch in the flyback converter, and when the AC voltage detection module detects that the AC power grid is disconnected, the control module sends a safety regulation closing instruction to control the short circuit switch to be closed so as to turn off the output voltage of each photovoltaic module, thereby meeting the requirements of safety regulations, and being simple in structure and low in cost. The invention further discloses a photovoltaic system which has the same beneficial effects as the photovoltaic inverter.

Description

technical field [0001] The invention relates to the field of electric energy conversion, in particular to a photovoltaic inverter and a photovoltaic system. Background technique [0002] Photovoltaic inverters can convert the direct current generated by photovoltaic modules into alternating current of mains frequency and output it to the alternating current grid. When the AC grid is disconnected, the photovoltaic inverter stops working, but the photovoltaic modules will output high voltage, which poses a safety risk and does not meet the requirements of safety regulations. Therefore, the safest way is to turn off the output voltage of photovoltaic modules to minimize the DC high voltage. In the prior art, an additional shut-off device is added at the output end of the photovoltaic module to shut off the output voltage of the photovoltaic module. Although this method can reduce the output voltage of the photovoltaic module, it also increases the power consumption of the phot...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/38H02J2300/22Y02E10/56
Inventor 罗宇浩
Owner ALTENERGY POWER SYST
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