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Photovoltaic system with energy storage measurement and control equipment, and control method thereof

A technology for measurement and control equipment and photovoltaic systems, which is applied in the monitoring of photovoltaic systems, photovoltaic modules, photovoltaic power generation, etc., to achieve the effects of diversified combinations, increased power storage, and low cost

Inactive Publication Date: 2016-10-12
深圳智慧能源技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the research, the system effect of battery internal resistance and state of charge, a pair of related variables, has not been fully valued. The industry hopes to find a technology that can increase the system's stored power, effectively prolong the service life of the battery pack, and reduce the system's power generation cost. Program

Method used

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  • Photovoltaic system with energy storage measurement and control equipment, and control method thereof
  • Photovoltaic system with energy storage measurement and control equipment, and control method thereof
  • Photovoltaic system with energy storage measurement and control equipment, and control method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0072] Design a low-power photovoltaic system called solar street lamps for roads in the city. The system consists of 200W photovoltaic modules 1, two 12V100Ah lead-acid maintenance-free batteries connected in series 4, 50W LED lamps (discharge load 10) and The energy storage measurement and control equipment 11 is composed.

[0073] The energy storage measurement and control device 11 includes a measurement and control device 2, a photovoltaic input terminal 3, a power output interface 5, a photovoltaic collection device 6, a discharge controller 8b and a patrol device 12; wherein the discharge controller 8b is a constant current power supply controller, Its power input terminal is electrically connected to the two poles of the battery pack 4 composed of two batteries connected in series, the power output terminal is electrically connected to the LED lamp, and the signal input terminal is connected to the measurement and control device 2; the measurement and control device 2 i...

Embodiment 2

[0081] Change the two 12V100Ah lead-acid maintenance-free storage batteries described in Example 1 into four 6V100Ah lead-acid maintenance-free storage batteries, and connect the four batteries in series to form the two extremes of the storage battery pack 4 and the three series taps in the middle, totaling five The external terminal; the power output interface 5 is correspondingly composed of 5 electronically controlled logic switches, and the measurement and control device 2 is respectively connected to the two extremes of the battery pack with 4 batteries connected in series and the middle 3 series tap terminals through the 5 electrically controlled logic switches. The connection method of the 5 electronically controlled logic switches and the 5 external terminals of the battery pack connected in series, and the rest of the connection methods of the photovoltaic energy storage measurement and control equipment and the power generation system are similar to those in Embodiment...

Embodiment 3

[0085] Embodiment 2 is further modified, and four 6V100Ah lead-acid maintenance-free batteries are replaced by twelve 2V100Ah single lead-acid batteries. The external terminal of the battery module; the power output interface 5 is correspondingly designed to consist of 13 electronically controlled logic switches.

[0086] In this embodiment, the 13 electronically controlled logic switches of the power supply output interface 5 perform corresponding on / off combinations under the programming control of the measurement and control device 2, so that the charging intensity of the single battery can be realized under the state of weaker light energy. Indirect improvement, further utilizing the electric energy obtained by photovoltaic modules in low-light environment, and at the same time, charging 12 single batteries with time distribution and even distribution, so as to achieve the purpose of effective battery maintenance.

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Abstract

The photovoltaic system includes a photovoltaic system with energy storage measurement and control equipment, and a control method of the photovoltaic system. The photovoltaic system comprises a photovoltaic assembly, a storage battery pack, a discharge load and the energy storage measurement and control equipment, wherein the energy storage measurement and control equipment comprises a measuring and control device, a photovoltaic input end, a power output interface, a photovoltaic acquisition device, a discharge controller and a patrol inspection device; the measuring and control device is connected with the photovoltaic input end and the power output interface; the photovoltaic acquisition device is connected with the photovoltaic input end and the measuring and control device; the power output interface is composed of a plurality of electric control logic switches connected with both ends of the storage battery pack and a serial tap end thereof; the storage battery pack comprises at least two power supply modules and a serial interface provided with an external connecting end; and the energy storage measurement and control equipment achieves intelligent charging of the storage battery pack through changing combined state of its power output interface in real time under a set measuring and control logic. The photovoltaic system and the control method thereof can prolong service life of the storage batteries, and increase electricity storage and generation capacity of the system.

Description

technical field [0001] The invention relates to the design field of photovoltaic power generation systems, in particular to a photovoltaic system with energy storage measurement and control equipment and a control method thereof. Background technique [0002] Photovoltaic application is a hot spot in the development of new energy. Photovoltaic modules, also commonly known as solar cells, are a technology that uses the photovoltaic effect of the semiconductor interface to directly convert light energy into electrical energy; narrowly defined photovoltaic power generation systems refer to photovoltaic modules, controllers and inverters. The three parts of the inverter do not involve the battery and mechanical parts. [0003] Photovoltaic power generation systems are divided into independent photovoltaic power generation systems, grid-connected photovoltaic power generation systems and distributed photovoltaic power generation systems, among which independent photovoltaic power...

Claims

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Application Information

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IPC IPC(8): H02J7/35H02S50/10H02S40/30
CPCH02J7/35H02S40/30H02S50/10Y02E10/56
Inventor 刘粤荣刘曦
Owner 深圳智慧能源技术开发有限公司
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