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A kind of inverter and its operation method and controller

An operation method and inverter technology, applied in the direction of single-grid parallel feeding arrangement, photovoltaic power generation, etc., can solve problems such as port connection to the power grid and load inverter failure to operate normally, to solve the problem of initial wiring error leading to failure to operate, The effect of saving troubleshooting time

Active Publication Date: 2020-11-10
SUNGROW POWER SUPPLY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides an inverter, its operation method and controller, so as to avoid the problem that the inverter cannot operate normally due to wrong ports connected to the power grid and loads

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  • A kind of inverter and its operation method and controller
  • A kind of inverter and its operation method and controller
  • A kind of inverter and its operation method and controller

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0046] The invention provides an operation method of an inverter, so as to avoid the problem that the inverter cannot operate normally due to wrong ports being used to connect the power grid and loads.

[0047] The operation method of the inverter is applied to the controller of the inverter in the grid-connected and off-grid hybrid photovoltaic system. The structure of the inverter is as follows: figure 1 As shown, it includes: a DC / AC converter, a first switching device K1, a second switc...

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Abstract

The invention provides an inverter, an operation method thereof, and a controller. The method comprises the steps: first detecting the voltages of two AC ports of the inverter when the inverter is initially powered on; judging whether the two AC ports are respectively connected with a power grid and a load or not according to the voltages of the two AC ports; and controlling a DC / AC converter in the inverter to operate according to a preset scheme if the two AC ports are respectively connected with the power grid and the load and to generate electric energy flow between the DC / AC converter andthe corresponding AC port of the inverter. According to the operation method, after the inverter is installed for the first time, as long as one of the two AC current ports is connected with the power grid and the other one is connected with the load, the DC / AC converter can be automatically detected and controlled to operate in a corresponding mode; the method solves the problem that in the prior art, an inverter cannot operate due to initial wiring errors, and the method saves the fault removing time of a traditional scheme.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an inverter, its operating method and a controller. Background technique [0002] The photovoltaic power generation system generates direct current from the photovoltaic array, and then converts the direct current into alternating current by the inverter of the subsequent stage. Conventional photovoltaic power generation systems are divided into off-grid photovoltaic systems and grid-connected photovoltaic systems. Among them, the off-grid photovoltaic system supplies the electric energy output by the inverter to the local load, and the grid-connected photovoltaic system transmits the electric energy output by the inverter to the in the grid. [0003] In recent years, there have been more and more applications of grid-connected and off-grid hybrid photovoltaic systems. The inverter has two ports, the grid-connected port and the load port. electrical energy. [0004] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCY02E10/56
Inventor 俞雁飞倪华柏杨
Owner SUNGROW POWER SUPPLY CO LTD
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