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Photovoltaic inverter interface device, system, and method

一种光伏系统、逆变器的技术，应用在光伏发电、电路装置、电池电路装置等方向，能够解决逆变器损耗大、成本高等问题

Inactive Publication Date: 2011-01-12
ADVANCED ENERGY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For example, an inverter using silicon rated for about 1400 volts is significantly more lossy and much more costly than an inverter using silicon rated for 1200 volt applications

Method used

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  • Photovoltaic inverter interface device, system, and method
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  • Photovoltaic inverter interface device, system, and method

Examples

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Embodiment Construction

[0022] Referring now to the drawings, in which like reference numerals designate like or similar elements throughout the several views, in particular figure 1 , which is a block diagram illustrating a photovoltaic system 100 including a photovoltaic array 102 coupled to an inverter 108 via a photovoltaic (PV) interface 104 .

[0023] Typically, photovoltaic array 102 converts solar energy to DC electrical power, which is converted to AC power (eg, three-phase power) by inverter 108 . The PV interface 204 is generally used to enable the inverter 108 (designed to operate at a lower voltage) to be utilized in conjunction with the PV array 102, which operates at least part of the time (e.g., at no load) at a voltage exceeding that of the inverter. 108 designed working voltage voltage.

[0024] In many embodiments, PV interface 104 is a low duty cycle device that operates only briefly during startup and / or shutdown to gradually connect or disconnect PV array 102 to and from invert...

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PUM

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Abstract

A photovoltaic system, method and apparatus are disclosed. In an exemplary embodiment, the system includes a first and second inputs adapted to couple to a first and second rails of a photovoltaic array; an inverter configured to convert DC power from the photovoltaic array to AC power; and an interface portion coupled to the first and second inputs and the inverter, the interface portion configured to isolate at least one of the first and second inputs from the inverter and to modulate an application of a voltage from the photovoltaic array to the inverter so as to increase a load on the photovoltaic array and to reduce the voltage applied from the photovoltaic array to the inverter.

Description

technical field [0001] The present invention relates generally to apparatus and methods for converting solar energy to electrical energy, and more particularly to apparatus and methods for more efficiently converting solar energy to electrical energy. Background technique [0002] The conversion of light energy into electrical energy using photovoltaic (PV) systems has been known for a long time and these photovoltaic systems are increasingly implemented in residential, commercial and industrial applications. Although developments and improvements have been made to these photovoltaic systems over the past few years to increase their efficiency, the efficiency of photovoltaic systems remains a focus for continuing to improve the economic viability of photovoltaic systems. [0003] A photovoltaic system generally includes components such as a photovoltaic array that generates DC power and an inverter that converts the DC power into AC power (eg, single-phase or three-phase pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H02J7/35
CPCY02E10/563Y10S136/291H02J3/383H02J2300/24H02J3/381Y02E10/56
Inventor E·西摩J·A.·吉尔摩
Owner ADVANCED ENERGY IND INC