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Photovoltaic power optimization system

A technology of power optimization and power optimizer, which is applied in the field of power devices, and can solve problems such as failure of battery panels to operate, loss of power and power generation, loss of photovoltaic cell efficiency, etc.

Active Publication Date: 2016-12-21
FONRICH NEW ENERGY TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

When some cells in the same string fail to generate electricity due to poor product consistency or shadow occlusion, the efficiency of the entire string of photovoltaic cells will suffer a serious loss, and the inverter, especially the centralized inverter When there are many connected battery panel arrays, the battery panels of each string will not be able to operate at their maximum power point, which is a loss of electric energy and power generation

Method used

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  • Photovoltaic power optimization system
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Examples

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Embodiment Construction

[0072] see figure 1 , PV modules PV_1, PV_2, ... PV_N connected in series (N is a natural number greater than 1) are combined together to form a photovoltaic string 101, and a plurality of such photovoltaic strings 101 are then connected in parallel to jointly generate the inverter 170. of DC voltage. The disconnecting module 151 is connected to the positive pole of the photovoltaic string 101 and an energy storage capacitor C of the inverter 170 DC Between the first ends of the first end, the disconnection module 152 is connected between the negative electrode of the photovoltaic string 101 and the capacitor C DC between the second ends of . When the disconnecting modules 151 and 152 are connected, the photovoltaic string 101 can be an energy storage capacitor C DC power supply, otherwise when they are disconnected the energy storage capacitor C DC The voltage source cannot be extracted from the photovoltaic string 101 side. In the photovoltaic inverter field, the DC vol...

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Abstract

The invention mainly relates to a photovoltaic power optimization system, which comprises a plurality of photovoltaic assemblies which are connected in series, wherein each photovoltaic assembly is provided with a carrier transmission module which is used for forming a communication carrier on a transmission line of connecting the photovoltaic assemblies in series; each photovoltaic assembly is provided with a carrier sensing module which is used for extracting a communication carrier on the transmission line; and at least one part of photovoltaic assemblies are provided with a wireless communication module, so that at least one part of photovoltaic assemblies receive or transmit first data which are reflected in a wireless communication form through the arranged wireless communication module, and / or the photovoltaic assemblies receive second data which are reflected in a communication carrier form on the transmission line through the arranged carrier sensing module.

Description

technical field [0001] The present invention mainly relates to a power device for solar power generation. To be precise, it adopts a scheme in which a multi-stage voltage conversion circuit is used in each photovoltaic module, so that any one-stage voltage conversion circuit can independently control a battery corresponding to it. The strings perform independent maximum power point tracking calculations to ensure the stability of the output power of the entire solar power generation system. Background technique [0002] With the limitations of traditional energy sources such as oil, coal, and natural gas, as well as the increasingly serious negative environmental problems caused by traditional energy sources, especially under the conditions of the changing economic, political, and social environments around the world, it is necessary to look for an alternative Replacing the traditional chemical energy with limited resources and polluting the environment with renewable energy...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J13/00
CPCH02J3/385H02J13/0075H02J13/00007Y04S10/50Y04S40/121Y02E60/00Y02E40/70
Inventor 张永
Owner FONRICH NEW ENERGY TECH LTD
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