A modular photovoltaic energy system without electrolytic capacitors and its modulation method

A technology of electrolytic capacitors and modulation methods, applied in photovoltaic power generation, energy storage, electrical components, etc., can solve problems such as difficult to effectively optimize and stabilize the system, complex modulation control circuits, and large differences in switching losses, and achieve enhanced sun tracking capabilities and Energy harvesting capability, extended service life, and reduced switching loss

Active Publication Date: 2022-07-08
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

For the symmetrical design of the single-phase inverter, the switching losses of the two bridge arm switching tubes are quite different due to the difference in the switching state, which further leads to thermal imbalance, and the modulation control circuit is relatively complex, the control efficiency is low, and it is difficult to effectively optimize , stable system operation

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  • A modular photovoltaic energy system without electrolytic capacitors and its modulation method
  • A modular photovoltaic energy system without electrolytic capacitors and its modulation method
  • A modular photovoltaic energy system without electrolytic capacitors and its modulation method

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[0029]The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0030] Unless expressly stated otherwise, throughout the specification and claims, the term "comprising" or its conjugations such as "comprising" or "comprising" and the like will be understood to include the stated elements or components, and Other elements or other components are not excluded.

[0031] figure 1 A schematic structural diagram of a modular photovoltaic energy system without electrolytic capacitors according to a preferred embodiment of the present invention is shown.

[0032] The circuit block diagram of the photovoltaic energy system according to an embodiment of the present invention is as follows: figure 1 As shown, it includes an integrated photovoltaic conversion module and a photovoltaic system ma...

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Abstract

The invention relates to a modular photovoltaic energy system without electrolytic capacitors and a modulation method thereof. The system includes an integrated photovoltaic conversion module and a photovoltaic system main module connected by a fluctuating DC bus; the integrated photovoltaic conversion module is plug-and-play It consists of a plurality of photovoltaic cells and a plurality of single-phase DC / DC converters, and each of the photovoltaic cells is individually connected to one of the single-phase DC / DC converters; the main module of the photovoltaic system is composed of high-power density energy storage The module is composed of a single-phase inverter module, the input end of the single-phase inverter module is connected with the input end of the fluctuating DC bus, and the output end of the fluctuating DC bus is connected to the power grid. The system and modulation method of the present invention can prolong the service life of the photovoltaic system and improve the system efficiency.

Description

technical field [0001] The invention relates to the technical field of new energy power generation, in particular to a modular photovoltaic energy system without electrolytic capacitors and a modulation method thereof. Background technique [0002] Since the 12th and 13th Five-Year Plans, the country has paid more and more attention to the development and application of renewable energy technology. In the existing energy power generation system, solar power generation occupies a large proportion of renewable energy. The characteristics of non-polluting, abundant resources, and broad prospects make photovoltaic cells also become a new energy device. However, due to the volatility, randomness and intermittent characteristics of photovoltaic power generation, the output power is unstable and affected by environmental factors. greater impact. [0003] In order to solve the above problems, an energy storage system is usually introduced into the photovoltaic power generation syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/28H02J3/38
CPCH02J3/383H02J3/385H02J3/28Y02E70/30
Inventor 潘学伟赵飞庞志聪李磊
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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