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Photovoltaic integrated system

A photovoltaic and photovoltaic power generation technology, applied in photovoltaic modules, photovoltaic power generation, photovoltaic power stations, etc., can solve the problems of small intermittent fluctuation of independent photovoltaic power generation capacity, influence of grid stability, and limited engineering applications, and achieve good stability and controllability , the effect of promoting development and improving utilization

Inactive Publication Date: 2021-02-02
国网天津市电力公司营销服务中心 +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the capacity of independent photovoltaic power generation is small and has intermittent fluctuations, and decentralized access has a serious impact on the stability of the power grid, which limits its wide engineering application

Method used

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  • Photovoltaic integrated system
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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] Photovoltaic integrated systems, such as figure 1 As shown, it includes a photovoltaic power generation part, an energy storage part and an inverter part. The photovoltaic power generation part and the energy storage part share a DC bus; the photovoltaic power generation part includes a photovoltaic array PV and a Boost power converter, and the energy storage part includes an energy storage and a bidirectional DC / DC converter, the photovoltaic array PV is connected to the inverter part through the Boost power converter to realize maximum power tracking control and given power tracking control; the energy storage is connected to the inverter part through the bidirectional DC / DC converter to realize the voltage and current Control; the inverter part adopts three-phase full-bridge inverter grid connection, which can be connected to DC load unit and AC loa...

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Abstract

The invention relates to a photovoltaic integrated system, which is technically characterized in that the generated power of a photovoltaic and energy storage unit in a microgrid can be flexibly configured, and a system control unit establishes control on each unit based on communication and a photovoltaic power generation part and an energy storage part for operating parameter configuration sharea direct-current bus; compared with a traditional common alternating-current bus structure, the number of inverters is reduced, the size is smaller, and the structure is more compact. Meanwhile, themethod can adapt to various application scenes, is good in practical applicability, and can be applied to a roof photovoltaic energy storage integrated system and an industrial park. Meanwhile, the photovoltaic array PV terminal voltage with the current source characteristics is adjusted through the Boost conversion circuit, the maximum power point tracking control MPPT control mode and the limited power control mode are achieved, the complementary capacity is good, the peak clipping and valley filling effect is good, photovoltaic power fluctuation is restrained, and the utilization rate of photovoltaic power generation is effectively increased.

Description

technical field [0001] The invention belongs to the technical field of new energy, in particular to a photovoltaic integrated system. Background technique [0002] New energy photovoltaic power generation technology converts huge solar energy reserves into electric energy, which forms a powerful supplement to the existing energy consumption system and has received extensive attention in recent years. However, the capacity of independent photovoltaic power generation is small and has intermittent fluctuations, and decentralized access has a serious impact on the stability of the power grid, which limits its wide engineering application. Practice has shown that photovoltaic power generation and energy storage are organically combined to form an integrated and controllable microgrid, including distributed photovoltaic power generation, energy storage, load and its control system, and give full play to the balancing role of energy storage in the case of fluctuations in photovolt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02S10/20G05F1/67
CPCH02J3/38H02S10/20G05F1/67H02J2300/26Y02E70/30Y02P80/20Y02E10/56Y02B10/10
Inventor 杨光李晓辉刘小琛刘洋洋梁彬刘伟东李磊李丹邹琪赵庆来
Owner 国网天津市电力公司营销服务中心
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