Data communication method of photovoltaic power optimization system

A power optimization and data communication technology, applied in the field of power devices, can solve problems such as the failure of battery panels to operate, the loss of electric energy and power generation, and the loss of photovoltaic cell efficiency

Active Publication Date: 2017-01-11
FONRICH NEW ENERGY TECH LTD
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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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  • Data communication method of photovoltaic power optimization system
  • Data communication method of photovoltaic power optimization system
  • Data communication method of photovoltaic power optimization system

Examples

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Embodiment Construction

[0064] see figure 1 , PV_1, PV_2, . the DC voltage. The circuit breaking 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 circuit breaker module 152 is connected between the negative electrode of the photovoltaic string 101 and the capacitor C DC between the second ends. When the circuit breaker modules 151 and 152 are turned on, the photovoltaic string 101 can be an energy storage capacitor C DC supply, otherwise when they are disconnected the storage capacitor C DC The voltage source cannot be extracted from the photovoltaic string 101 side. In the field of photovoltaic inverters, the DC voltage source generated by the photovoltaic modules needs to be converted into alternating current to achieve grid connection. The function of the photovoltaic inverter 170 is to convert the direct current power provided by the photovoltaic string 101 into alternating curre...

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Abstract

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

Description

technical field [0001] The present invention mainly relates to a power device for solar power generation, to be precise, a scheme of using a multi-level voltage conversion circuit in each photovoltaic module is adopted, so that any level of voltage conversion circuit can be used for a battery corresponding to it. The string performs an independent maximum power point tracking calculation to ensure the stability of the output power of the entire solar power generation system. Background technique [0002] With the limitation of traditional energy sources such as oil, coal, natural gas, and the increasingly serious negative environmental problems caused by traditional energy sources, especially under the conditions of the ever-changing global economic, political and social environment, it is necessary to find an alternative Replacing the traditional chemical energy with limited resources and polluting the environment with renewable energy that is exhausted and repeated has bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J13/00
CPCH02J3/386H02J13/0075H02J13/00009Y02E10/76Y04S10/50Y04S40/121Y02E60/00Y02E40/70
Inventor 应剑东张永
Owner FONRICH NEW ENERGY TECH LTD
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