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DC-AC inverter for photovoltaic systems

A DC-AC and converter technology, applied in the field of DC-AC inverters and photovoltaic systems, can solve problems such as power loss, achieve good utilization, and reduce the risk of electrical accidents

Active Publication Date: 2014-05-28
MARICI HLDG THE NETHERLANDS BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with the disclosed system is the power loss that occurs when transferring solar energy from each solar panel to the corresponding H-bridge converter

Method used

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  • DC-AC inverter for photovoltaic systems
  • DC-AC inverter for photovoltaic systems
  • DC-AC inverter for photovoltaic systems

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Embodiment Construction

[0026] The present invention will be described more fully hereinafter with reference to the accompanying drawings that illustrate certain embodiments of the invention. However, the invention may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein; rather, these specific embodiments are provided by way of illustration so that this invention will be thorough and complete, And fully express the protection scope of the present invention.

[0027] figure 1 An H-bridge converter that will be used in an embodiment of the invention is shown. Typically, the switching elements of the H-bridge converter 10 are implemented in the form of four metal oxide semiconductor field effect transistors (MOS-FETs) Q1 , Q2 , Q3 and Q4 , but any other suitable switching elements could be used. A cascaded H-bridge converter consists of a plurality of converters 10 connected in cascade, each converter 10 having a separate DC link capa...

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Abstract

The present invention relates to a DC-AC inverter comprising a plurality of H-bridge converters (101, 102, etc.), each being arranged to be integrated with a respective photovoltaic element (108, 109, etc.) and to be supplied with a DC voltage from the photovoltaic element, the H-bridge converters further being cascaded to produce a multilevel voltage output (Vout). The DC-AC inverter further comprises switch control circuitry connected to each one of the plurality of H-bridge converters to control switching thereof for producing the multilevel voltage output, and a central adaptation unit connected to the cascaded H-bridge converter for adapting the multilevel voltage output such that an AC grid voltage is output from the DC-AC inverter.

Description

technical field [0001] The present invention relates to DC-AC inverters and photovoltaic systems. Background technique [0002] In the related art, a number of different DC-AC inverter types have been used to connect photovoltaic (PV) elements, such as solar panels, to an existing grid. Examples of related art converter types used to convert DC voltage generated by solar panels to AC voltage are such as string converters, power optimizers, and micro converters. Each type of converter is associated with specific advantages and disadvantages. For example, a string converter has high conversion efficiency, but poor conversion efficiency when it comes to partial shade light harvesting; whereas a power optimizer performs well in partial shade light harvesting, but is less efficient and more efficient than a string converter. expensive. Finally, microconverters generally perform well and are versatile, but are more expensive than both string converters and power optimizers. ...

Claims

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Application Information

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IPC IPC(8): H02M7/49H02J3/38
CPCH02J3/383Y02E10/563H02M7/49H02J2300/24H02J3/381Y02E10/56H02J3/46H02M7/5387H02S40/32
Inventor T·莫德尔
Owner MARICI HLDG THE NETHERLANDS BV
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