CN203166544U - Photovoltaic grid-connected power generation system - Google Patents

Photovoltaic grid-connected power generation system Download PDF

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Publication number
CN203166544U
CN203166544U CN2013200796680U CN201320079668U CN203166544U CN 203166544 U CN203166544 U CN 203166544U CN 2013200796680 U CN2013200796680 U CN 2013200796680U CN 201320079668 U CN201320079668 U CN 201320079668U CN 203166544 U CN203166544 U CN 203166544U
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China
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grid
converter
inverter
power generation
generation system
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CN2013200796680U
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Chinese (zh)
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樊晓虹
韩耀飞
陈国振
赵张飞
邢广成
陶媛媛
祁林
樊斌
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Henan University of Urban Construction
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Henan University of Urban Construction
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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Abstract

The utility model relates to a photovoltaic grid-connected power generation system comprising a solar photovoltaic assembly. The solar photovoltaic assembly is connected with a DC/DC converter; the DC/DC converter is connected with a DC/AC inverter by a DC-link capacitor; the DC/AC inverter is connected with a power grid; and the DC/DC converter and the DC/AC inverter are respectively connected with a control circuit for controlling the converter and the inverter. According to the utility model, the provided photovoltaic grid-connected power generation system has the advantages of simple structure and high efficiency and can be widely applied to a low-power power generating system.

Description

光伏并网发电系统Photovoltaic grid-connected power generation system

技术领域technical field

本实用新型涉及太阳能发电领域，具体说是一种光伏并网发电系统。The utility model relates to the field of solar power generation, in particular to a photovoltaic grid-connected power generation system.

背景技术Background technique

随着常规能源的紧缺，太阳能的利用逐渐得到重视，它被认为是当今世界上最有发展前景的新能源技术，特别是与建筑表面结合为一体的光伏建筑一体化技术更受青睐。现有的光伏建筑一体化系统主要由固定在建筑表面的太阳能光伏电池组件和并网逆变器等设备组成，它可以将太阳光能转换为电能，直接供给用户。但是现有的光伏并网发电系统结构复杂、效率不高，在小功率发电系统上应用价值不大。With the shortage of conventional energy sources, the use of solar energy has gradually gained attention. It is considered to be the most promising new energy technology in the world today, especially the integrated photovoltaic technology integrated with building surfaces is more popular. The existing BIPV system is mainly composed of solar photovoltaic cell components fixed on the building surface and grid-connected inverters and other equipment, which can convert solar energy into electrical energy and directly supply it to users. However, the existing photovoltaic grid-connected power generation system has a complex structure and low efficiency, and has little application value in low-power power generation systems.

实用新型内容Utility model content

针对现有技术中存在的缺陷，本实用新型的目的在于提供一种光伏并网发电系统，克服现有系统结构复杂、效率不高，在小功率发电系统上应用价值不大的问题。Aiming at the defects existing in the prior art, the purpose of this utility model is to provide a photovoltaic grid-connected power generation system, which overcomes the problems of complex structure, low efficiency and little application value in low-power power generation systems of the existing system.

为达到以上目的，本实用新型采取的技术方案是：For achieving above object, the technical scheme that the utility model takes is:

一种光伏并网发电系统，包括太阳能光伏组件1，太阳能光伏组件1和DC／DC变换器2连接，DC／DC变换器2通过DC-link电容器4和DC／AC逆变器3连接，DC／AC逆变器3和电网5连接，DC／DC变换器2和DC／AC逆变器3分别和控制二者的控制电路6连接。A photovoltaic grid-connected power generation system, including a solar photovoltaic module 1, the solar photovoltaic module 1 is connected to a DC/DC converter 2, the DC/DC converter 2 is connected to a DC/AC inverter 3 through a DC-link capacitor 4, and the DC The /AC inverter 3 is connected to the power grid 5, and the DC/DC converter 2 and the DC/AC inverter 3 are respectively connected to a control circuit 6 for controlling the two.

在上述技术方案的基础上，太阳能光伏组件1上连接有辅助电源7，辅助电源7和控制电路6连接并为其供电。On the basis of the above technical solution, the solar photovoltaic module 1 is connected with an auxiliary power supply 7, and the auxiliary power supply 7 is connected with the control circuit 6 to provide power for it.

在上述技术方案的基础上，DC／AC逆变器3和电网5之间设有一个滤波器8。On the basis of the above technical solution, a filter 8 is provided between the DC/AC inverter 3 and the grid 5 .

在上述技术方案的基础上，控制电路6是以数字信号处理器为核心的控制电路。On the basis of the above technical solutions, the control circuit 6 is a control circuit with a digital signal processor as its core.

在上述技术方案的基础上，DC／DC变换器2采用升压式变换电路。On the basis of the above technical solution, the DC/DC converter 2 adopts a step-up conversion circuit.

在上述技术方案的基础上，太阳能光伏组件1包括电池板9，电池板9倾斜设置，而且其中部转动设置在建筑物的女儿墙10上，上部和下部分别通过可以调节高度的支杆11转动设置在女儿墙10的内侧和外侧。On the basis of the above-mentioned technical solution, the solar photovoltaic module 1 includes a battery panel 9, the battery panel 9 is arranged obliquely, and its middle part is rotatably arranged on the parapet 10 of the building, and the upper part and the lower part are respectively rotated through the pole 11 which can adjust the height It is arranged on the inner side and the outer side of the parapet wall 10.

本实用新型所述的光伏并网发电系统结构简单、效率高，在小功率发电系统上可以广泛应用。The photovoltaic grid-connected power generation system described in the utility model has simple structure and high efficiency, and can be widely used in low-power power generation systems.

附图说明Description of drawings

本实用新型有如下附图：The utility model has following drawings:

图1  光伏并网发电系统结构示意图，Figure 1 Schematic diagram of photovoltaic grid-connected power generation system,

图2  太阳能光伏组件结构示意图。Figure 2 Schematic diagram of the structure of solar photovoltaic modules.

具体实施方式Detailed ways

以下结合附图对本实用新型作进一步详细说明。Below in conjunction with accompanying drawing, the utility model is described in further detail.

参见图1，本实用新型所述的光伏并网发电系统，包括太阳能光伏组件1，太阳能光伏组件1和DC／DC变换器2连接，DC／DC变换器2通过DC-link电容器4和DC／AC逆变器3连接，DC-link电容器4除了连接二者外，还实现了功率的传递。DC／AC逆变器3通过滤波器8和电网5连接，DC／DC变换器2和DC／AC逆变器3分别和控制二者的控制电路6连接，控制电路6是以数字信号处理器为核心的控制电路。Referring to Fig. 1, the photovoltaic grid-connected power generation system described in the utility model includes a solar photovoltaic module 1, and the solar photovoltaic module 1 is connected to a DC/DC converter 2, and the DC/DC converter 2 is connected to a DC/DC converter through a DC-link capacitor 4. The AC inverter 3 is connected, and the DC-link capacitor 4 not only connects the two, but also realizes power transmission. The DC/AC inverter 3 is connected to the power grid 5 through a filter 8, and the DC/DC converter 2 and the DC/AC inverter 3 are respectively connected to a control circuit 6 that controls the two, and the control circuit 6 is based on a digital signal processor as the core control circuit.

DC／DC变换器2采用升压式变换电路，可以始终工作在输入电流连续的状态下，只要输入电感足够大，电感上的纹波电流小到接近平滑的直流电流，因此只需加入通量较小的无感电容甚至不加电容，避免了加电容带来的弊端。升压式变换电路简单，率开关器件的驱动设计方便。The DC/DC converter 2 adopts a step-up conversion circuit, which can always work in the state of continuous input current. As long as the input inductance is large enough, the ripple current on the inductance is small enough to be close to a smooth DC current, so only the flux Smaller non-inductive capacitors do not even add capacitors, avoiding the disadvantages of adding capacitors. The boost conversion circuit is simple, and the driving design of the rate switching device is convenient.

在上述技术方案的基础上，太阳能光伏组件1上连接有辅助电源7，辅助电源7和控制电路6连接并为其供电。On the basis of the above technical solution, the solar photovoltaic module 1 is connected with an auxiliary power supply 7, and the auxiliary power supply 7 is connected with the control circuit 6 to provide power for it.

参见图2，太阳能光伏组件1包括电池板9，电池板9倾斜设置，而且其中部转动设置在建筑物的女儿墙10上，上部和下部分别通过可以调节高度的支杆11转动设置在女儿墙10的内侧和外侧。本太阳能光伏组件1可以根据四季太阳高度的变化调整电池板的倾角，提高太阳能的利用效率。Referring to Fig. 2, the solar photovoltaic module 1 includes a battery panel 9, the battery panel 9 is arranged obliquely, and its middle part is rotatably set on the parapet wall 10 of the building, and the upper part and the lower part are respectively rotatably set on the parapet wall 11 through height-adjustable poles 11. 10 inside and outside. The solar photovoltaic module 1 can adjust the inclination angle of the battery panel according to the change of the sun height in four seasons, so as to improve the utilization efficiency of solar energy.

本实用新型提供的光伏并网发电系统采用无变压器方式，只采用一级DC／AC变换直接并网，结构简单、效率高，在小功率发电系统上可以广泛应用。The photovoltaic grid-connected power generation system provided by the utility model adopts a non-transformer mode, and only adopts one-stage DC/AC conversion to directly connect to the grid. It has a simple structure and high efficiency, and can be widely used in low-power power generation systems.

本说明书中未作详细描述的内容属于本领域专业技术人员公知的现有技术。The content not described in detail in this specification belongs to the prior art known to those skilled in the art.

Claims (6)

1. grid-connected photovoltaic system, comprise solar photovoltaic assembly (1), it is characterized in that, solar photovoltaic assembly (1) is connected with DC/DC converter (2), DC/DC converter (2) is connected with DC/AC inverter (3) by DC-l ink capacitor (4), DC/AC inverter (3) is connected with electrical network (5), and DC/DC converter (2) is connected with the control circuit (6) of controlling the two respectively with DC/AC inverter (3).
2. grid-connected photovoltaic system according to claim 1 is characterized in that: be connected with accessory power supply (7) on the solar photovoltaic assembly (1), accessory power supply (7) is connected with control circuit (6) and is its power supply.
3. grid-connected photovoltaic system according to claim 1 is characterized in that: be provided with a filter (8) between DC/AC inverter (3) and the electrical network (5).
4. grid-connected photovoltaic system according to claim 1, it is characterized in that: control circuit (6) is to be the control core circuit with the digital signal processor.
5. grid-connected photovoltaic system according to claim 1 is characterized in that: DC/DC converter (2) employing boost type translation circuit.
6. grid-connected photovoltaic system according to claim 1, it is characterized in that: solar photovoltaic assembly (1) comprises cell panel (9), cell panel (9) is obliquely installed, and rotation is arranged on the parapet (10) of building in the middle part of it, and the upper and lower is arranged on inboard and the outside of parapet (10) respectively by pole (11) rotation that can regulate height.
CN2013200796680U 2013-02-21 2013-02-21 Photovoltaic grid-connected power generation system Expired - Fee Related CN203166544U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107026606A (en) * 2016-08-29 2017-08-08 广西塔锡科技有限公司 A kind of anti-phase transformer of photovoltaic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107026606A (en) * 2016-08-29 2017-08-08 广西塔锡科技有限公司 A kind of anti-phase transformer of photovoltaic

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20130828

Termination date: 20160221