CN203225581U - Grid-connected photovoltaic power generation automatic switching apparatus for increasing self-consumed electric power and minimizing power grid surge - Google Patents

Grid-connected photovoltaic power generation automatic switching apparatus for increasing self-consumed electric power and minimizing power grid surge Download PDF

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CN203225581U
CN203225581U CN2013202069905U CN201320206990U CN203225581U CN 203225581 U CN203225581 U CN 203225581U CN 2013202069905 U CN2013202069905 U CN 2013202069905U CN 201320206990 U CN201320206990 U CN 201320206990U CN 203225581 U CN203225581 U CN 203225581U
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李钟实
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SHANXI HAOYANG NEW ENERGY TECHNOLOGY CO., LTD.
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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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • 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
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

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Abstract

The utility model discloses a grid-connected photovoltaic power generation automatic switching apparatus for increasing self-consumed electric power and minimizing power grid surge, and belongs to the photovoltaic power generation technology field. A technical problem is solved by providing the grid-connected photovoltaic power generation automatic switching apparatus which can automatically adapt to a requirement of grid connection, increase self-consumed electric power and minimize the impact on the power grid. The technical scheme is that: the power supply output terminal of a photovoltaic solar panel is connected to the first input terminal of a photovoltaic controller; the first output terminal of the photovoltaic controller is connected to the input terminal of the storage battery; the output terminal of the storage battery is connected to the second input terminal of the photovoltaic controller; the second output terminal of the photovoltaic controller is connected to the first input terminal of a dual-power automatic switcher after being connected to a grid connected inverter in serial; the second input terminal of the dual-power automatic switcher is connected to city power; and the output terminal of the dual-power automatic switcher is connected to a user alternating load. The grid-connected photovoltaic power generation automatic switching apparatus for increasing self-consumed electric power and minimizing power grid surge is applicable to household, an office, a district, etc.

Description

增加自用电量减少电网冲击的光伏并网发电自动切换装置Photovoltaic grid-connected power generation automatic switching device that increases self-consumption and reduces grid impact

技术领域 technical field

本实用新型增加自用电量减少电网冲击的光伏并网发电自动切换装置，属于光伏太阳能发电技术领域。 The utility model relates to an automatic switching device for photovoltaic grid-connected power generation, which increases self-consumption power and reduces the impact of power grids, and belongs to the technical field of photovoltaic solar power generation.

背景技术 Background technique

分布式发电通常是指利用分散式资源，装机规模较小的、布置在用户附近的以自发自用为主、余电上网为辅的发电系统，它一般接入低于35千伏或更低电压等级的电网，分布式光伏发电特指采用光伏组件，将太阳能直接转换为电能的分布式发电系统；目前应用最为广泛的分布式光伏发电系统，是建在城市建筑物屋顶的光伏发电项目，该类项目必须接入公共电网，与公共电网一起为附近的用户供电；但是如果没有公共电网支撑，分布式系统就无法保证用户的用电可靠性和用电质量。 Distributed power generation usually refers to a power generation system that uses distributed resources, has a small installed capacity, and is arranged near the user, mainly for self-use and supplemented by surplus power connected to the grid. It is generally connected to a voltage lower than 35 kV or lower Distributed photovoltaic power generation specifically refers to a distributed power generation system that uses photovoltaic modules to directly convert solar energy into electrical energy; currently the most widely used distributed photovoltaic power generation system is a photovoltaic power generation project built on the roof of an urban building. Such projects must be connected to the public grid, and together with the public grid, provide power to nearby users; but without the support of the public grid, the distributed system cannot guarantee the reliability and quality of power consumption for users.

分布式发电具有输出功率相对较小、污染小，环保效益突出和能够在一定程度上缓解局部的用电紧张状况等特点，但是，日夜更替，天气无常，分布式光伏发电的出力不具备规律性，需要公共电网作为备用；分布式电源接入并网但不向电网输送功率的分布式光伏发电会造成电压波动；并网并且向电网输送功率的并网方式，会造成电压波动并且影响继电保护，从而导致分布式光伏太阳能发电对电网的冲击不能够很好的解决。 Distributed power generation has the characteristics of relatively small output power, low pollution, outstanding environmental protection benefits, and can alleviate local power consumption tension to a certain extent. However, the output of distributed photovoltaic power generation is not regular due to the change of day and night and the unpredictable weather. , the public grid is required as a backup; distributed photovoltaic power generation in which distributed power is connected to the grid but does not transmit power to the grid will cause voltage fluctuations; grid-connected and grid-connected methods that transmit power to the grid will cause voltage fluctuations and affect the relay Protection, resulting in the impact of distributed photovoltaic solar power generation on the grid cannot be well resolved.

实用新型内容 Utility model content

本实用新型克服现有技术存在的不足，所要解决的技术问题是：提供一种能够自动适应并网要求，增加自用电量，同时能减小对电网冲击的光伏并网发电自动切换装置。 The utility model overcomes the deficiencies in the prior art, and the technical problem to be solved is: to provide an automatic switching device for photovoltaic grid-connected power generation that can automatically adapt to grid-connected requirements, increase self-consumption power, and reduce the impact on the grid.

为解决上述技术问题，本实用新型所采用的技术方案是：增加自用电量减少电网冲击的光伏并网发电自动切换装置，包括光伏太阳能电池板、光伏控制器、蓄电池、并网逆变器、双路电源自动切换器和固态继电器； In order to solve the above technical problems, the technical solution adopted by the utility model is: an automatic switching device for photovoltaic grid-connected power generation that increases self-consumption power and reduces the impact on the grid, including photovoltaic solar panels, photovoltaic controllers, batteries, grid-connected inverters, dual Power supply automatic switcher and solid state relay;

所述光伏太阳能电池板的电源输出端与光伏控制器的第一输入端相连，所述光伏控制器的第一输出端与蓄电池的输入端相连，所述蓄电池的输出端与光伏控制器的第二输入端相连，光伏控制器的第二输出端串接并网逆变器后与双路电源自动切换器的第一输入端相连，所述双路电源自动切换器的第二输入端与市电相连，双路电源自动切换器的输出端与用户交流负载相连； The power supply output end of the photovoltaic solar panel is connected to the first input end of the photovoltaic controller, the first output end of the photovoltaic controller is connected to the input end of the storage battery, and the output end of the storage battery is connected to the first input end of the photovoltaic controller. The two input terminals are connected, and the second output terminal of the photovoltaic controller is connected to the grid-connected inverter in series and then connected to the first input terminal of the dual power supply automatic switcher, and the second input terminal of the dual power supply automatic switcher is connected to the market Electrically connected, the output of the dual power supply automatic switcher is connected to the user's AC load;

所述固态继电器的输入端并接在双路电源自动切换器的第一输入端，固态继电器的输出端与市电相连，固态继电器的采样控制端与光伏太阳能电池板的电源输出端相连。 The input end of the solid state relay is connected to the first input end of the dual power supply automatic switcher in parallel, the output end of the solid state relay is connected to the mains, and the sampling control end of the solid state relay is connected to the power output end of the photovoltaic solar panel.

所述蓄电池有多个。 There are multiple accumulators.

本实用新型与现有技术相比具有的有益效果是：本实用新型通过增加蓄电功能和自动切换装置，能够实现： Compared with the prior art, the utility model has the beneficial effects that: the utility model can realize:

一、保证因多云、阴影遮挡造成短时间阳光强度变化时，利用蓄电池的电量维护逆变器供电的稳定运行，减少光伏发电电压变化对电网的冲击； 1. Ensure that when the intensity of sunlight changes in a short period of time due to cloudy and shadow occlusion, the power of the battery is used to maintain the stable operation of the inverter power supply and reduce the impact of photovoltaic power generation voltage changes on the power grid;

二、利用蓄电池的存储功能，白天将用户余电存储一部分，到阳光落下光伏发电系统停止运行时，先启用蓄电池的存储电量继续供电，推迟电网为用户的供电时间，缓和电网压力，增加用户的自发自用电量，减少余电上网； 2. Use the storage function of the battery to store part of the user's surplus electricity during the day, and when the photovoltaic power generation system stops operating when the sun falls, first enable the stored electricity of the battery to continue power supply, delaying the power supply time of the grid for the user, easing the pressure on the grid, and increasing the user's power. Spontaneous self-consumption, reducing surplus power to the grid;

三、用户未使用该实用新型自动切换装置前，当阳光消失后，各个光伏发电系统基本同时停止工作，而改由电网对用户供电，这种状况对电网的冲击较大；本实用新型自动切换装置后，由于各个光伏系统具有一定的存储电能，且用户用电量大小不一，各个光伏发电系统会根据各自用电状况在阳光消失后的一段时间内分别陆续停止工作，陆续接入电网供电，减少了对电网的冲击； 3. Before the user uses the automatic switching device of the utility model, when the sunlight disappears, each photovoltaic power generation system basically stops working at the same time, and the grid supplies power to the user instead. This situation has a greater impact on the grid; the utility model automatically switches After installation, since each photovoltaic system has a certain amount of stored electric energy, and the power consumption of users is different, each photovoltaic power generation system will stop working one after another within a period of time after the sun disappears according to their respective power consumption conditions, and successively connect to the grid for power supply. , reducing the impact on the power grid;

本实用新型整个电路结构简洁，实用性强，元器件通用，成本较低。 The whole circuit of the utility model has the advantages of simple structure, strong practicability, universal components and low cost.

附图说明 Description of drawings

下面结合附图对本实用新型做进一步详细的说明： Below in conjunction with accompanying drawing, the utility model is described in further detail:

图1是本实用新型的电路结构示意图； Fig. 1 is the schematic diagram of circuit structure of the present utility model;

图中：1为光伏太阳能电池板、2为光伏控制器、3为蓄电池、4为并网逆变器、5为双路电源自动切换器、6为固态继电器、7为市电、8为用户交流负载。 In the figure: 1 is a photovoltaic solar panel, 2 is a photovoltaic controller, 3 is a storage battery, 4 is a grid-connected inverter, 5 is a dual power supply automatic switcher, 6 is a solid state relay, 7 is a mains power supply, and 8 is a user AC load.

具体实施方式 Detailed ways

如图1所示，本实用新型增加自用电量减少电网冲击的光伏并网发电自动切换装置，包括光伏太阳能电池板1、光伏控制器2、蓄电池3、并网逆变器4、双路电源自动切换器5和固态继电器6。 As shown in Figure 1, the utility model increases self-consumption electricity to reduce the impact of grid-connected photovoltaic power generation automatic switching device, including photovoltaic solar panel 1, photovoltaic controller 2, storage battery 3, grid-connected inverter 4, dual power supply automatic Switcher 5 and solid state relay 6.

所述光伏太阳能电池板1的电源输出端与光伏控制器2的第一输入端相连，所述光伏控制器2的第一输出端与蓄电池3的输入端相连，所述蓄电池3的输出端与光伏控制器2的第二输入端相连，光伏控制器2的第二输出端串接并网逆变器4后与双路电源自动切换器5的第一输入端相连，所述双路电源自动切换器5的第二输入端与市电7相连，双路电源自动切换器5的输出端与用户交流负载8相连；所述蓄电池3有多个。 The output end of the power supply of the photovoltaic solar panel 1 is connected to the first input end of the photovoltaic controller 2, the first output end of the photovoltaic controller 2 is connected to the input end of the storage battery 3, and the output end of the storage battery 3 is connected to the input end of the storage battery 3. The second input terminal of the photovoltaic controller 2 is connected, and the second output terminal of the photovoltaic controller 2 is connected with the grid-connected inverter 4 in series and then connected with the first input terminal of the dual power supply automatic switcher 5, and the dual power supply automatically switches The second input end of the switcher 5 is connected to the mains 7 , and the output end of the dual power supply automatic switcher 5 is connected to the user's AC load 8 ; there are multiple batteries 3 .

所述固态继电器6的输入端并接在双路电源自动切换器5的第一输入端，固态继电器6的输出端与市电7相连，固态继电器6的采样控制端与光伏太阳能电池板1的电源输出端相连。 The input end of described solid state relay 6 is connected in parallel with the first input end of dual-way power supply automatic switcher 5, the output end of solid state relay 6 is connected with mains 7, and the sampling control end of solid state relay 6 is connected with the photovoltaic solar panel 1. connected to the output of the power supply.

当阳光正常时，上述光伏太阳能电池板1将吸收的光能转化成电能，通过光伏控制器2将电能存储在蓄电池3中，同时为并网逆变器4供电，并网逆变器4输出的交流电一路通过双路电源自动切换器5为供电区域用户的交流负载8正常供电，当有剩余电量时，通过固态继电器6向市电7电网并网发电。 When the sunlight is normal, the above-mentioned photovoltaic solar panel 1 converts the absorbed light energy into electrical energy, stores the electrical energy in the battery 3 through the photovoltaic controller 2, and supplies power for the grid-connected inverter 4 at the same time, and the grid-connected inverter 4 outputs One way of the alternating current through the dual power supply automatic switcher 5 is the normal power supply for the alternating current load 8 of the user in the power supply area.

当没有阳光后，上述光伏太阳能电池板1没有电流输出，固态继电器6采样控制端的直流取样电压消失，固态继电器6断开，此时利用蓄电池3的电力继续供应用户交流负载8正常用电。 When there is no sunlight, the above-mentioned photovoltaic solar panel 1 has no current output, the DC sampling voltage of the sampling control terminal of the solid state relay 6 disappears, and the solid state relay 6 is disconnected. At this time, the power of the battery 3 is used to continue to supply the user's AC load 8 for normal power consumption.

当蓄电池3的电压也降到其放电保护电压时，由光伏控制器2控制蓄电池3停止向并网逆变器4供电，此时双路电源自动切换器5切换由电网市电7为用户交流负载8供电。 When the voltage of the storage battery 3 also drops to its discharge protection voltage, the photovoltaic controller 2 controls the storage battery 3 to stop supplying power to the grid-connected inverter 4. At this time, the dual-circuit power supply automatic switcher 5 switches and the mains power supply 7 of the power grid serves as the user's AC. The load 8 supplies power.

当新的一天开始，阳光正常时，并网逆变器4一输出交流电，双路电源自动切换器5自动切换到太阳能供电，同时进行储能和并网发电，能够将多余的电量反馈给电网，减少资源的浪费。 When a new day begins and the sun is normal, the grid-connected inverter 4 outputs alternating current, and the dual-circuit power supply automatic switcher 5 automatically switches to solar power supply, simultaneously performs energy storage and grid-connected power generation, and can feed excess power back to the grid , to reduce the waste of resources.

本实用新型仅通过普通电气元件实现了光伏并网发电增加自用电量的自动切换，保证了光伏并网发电和供电的可靠性，缓解了光伏并网发电系统启停运行对市电电网的冲击，增加了用户用电的自发自用量。整个电路结构简洁，实用性强。 The utility model realizes the automatic switching of photovoltaic grid-connected power generation to increase self-consumption electricity only through ordinary electrical components, ensures the reliability of photovoltaic grid-connected power generation and power supply, and alleviates the impact of the start-up and stop operation of photovoltaic grid-connected power generation system on the mains power grid. Increased self-consumption of user electricity. The whole circuit structure is simple and practical.

Claims (2)

1.增加自用电量减少电网冲击的光伏并网发电自动切换装置，其特征在于：包括光伏太阳能电池板（1）、光伏控制器（2）、蓄电池（3）、并网逆变器（4）、双路电源自动切换器（5）和固态继电器（6）； 1. An automatic switching device for photovoltaic grid-connected power generation that increases self-consumption and reduces grid impact, characterized by: including photovoltaic solar panels (1), photovoltaic controllers (2), batteries (3), and grid-connected inverters (4) , dual power supply automatic switcher (5) and solid state relay (6); 所述光伏太阳能电池板（1）的电源输出端与光伏控制器（2）的第一输入端相连，所述光伏控制器（2）的第一输出端与蓄电池（3）的输入端相连，所述蓄电池（3）的输出端与光伏控制器（2）的第二输入端相连，光伏控制器（2）的第二输出端串接并网逆变器（4）后与双路电源自动切换器（5）的第一输入端相连，所述双路电源自动切换器（5）的第二输入端与市电（7）相连，双路电源自动切换器（5）的输出端与用户交流负载（8）相连； The power output terminal of the photovoltaic solar panel (1) is connected to the first input terminal of the photovoltaic controller (2), and the first output terminal of the photovoltaic controller (2) is connected to the input terminal of the storage battery (3), The output terminal of the storage battery (3) is connected to the second input terminal of the photovoltaic controller (2), and the second output terminal of the photovoltaic controller (2) is connected in series with the grid-connected inverter (4) and automatically connected to the dual power supply The first input terminal of the switcher (5) is connected, the second input terminal of the dual power supply automatic switcher (5) is connected with the mains (7), and the output terminal of the dual power supply automatic switcher (5) is connected to the user The AC load (8) is connected; 所述固态继电器（6）的输入端并接在双路电源自动切换器（5）的第一输入端，固态继电器（6）的输出端与市电（7）相连，固态继电器（6）的采样控制端与光伏太阳能电池板（1）的电源输出端相连。 The input terminal of the solid state relay (6) is connected in parallel with the first input terminal of the dual power supply automatic switcher (5), the output terminal of the solid state relay (6) is connected with the mains (7), and the solid state relay (6) The sampling control terminal is connected with the power output terminal of the photovoltaic solar panel (1). 2.根据权利要求1所述的增加自用电量减少电网冲击的光伏并网发电自动切换装置，其特征在于：所述蓄电池（3）有多个。 2. The photovoltaic grid-connected power generation automatic switching device for increasing self-consumption and reducing power grid impact according to claim 1, characterized in that there are multiple storage batteries (3).
CN2013202069905U 2013-04-23 2013-04-23 Grid-connected photovoltaic power generation automatic switching apparatus for increasing self-consumed electric power and minimizing power grid surge Expired - Fee Related CN203225581U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2016100112B4 (en) * 2014-09-19 2016-11-17 Mabo Pty. Ltd Solar Power System
CN108181534A (en) * 2018-01-24 2018-06-19 宁波大家小家网络科技有限公司 A kind of method and system of hair electroanalysis fully surfed the Internet for photovoltaic generation
CN111800278A (en) * 2020-07-03 2020-10-20 河南万国科技股份有限公司 Network switcher
CN114050610A (en) * 2021-11-23 2022-02-15 西安热工研究院有限公司 Distributed photovoltaic power generation energy step adjusting device arranged in wind power plant

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2016100112B4 (en) * 2014-09-19 2016-11-17 Mabo Pty. Ltd Solar Power System
CN108181534A (en) * 2018-01-24 2018-06-19 宁波大家小家网络科技有限公司 A kind of method and system of hair electroanalysis fully surfed the Internet for photovoltaic generation
CN108181534B (en) * 2018-01-24 2023-09-29 宁波大家小家网络科技有限公司 Power generation analysis method and system for photovoltaic power generation full-amount internet surfing
CN111800278A (en) * 2020-07-03 2020-10-20 河南万国科技股份有限公司 Network switcher
CN114050610A (en) * 2021-11-23 2022-02-15 西安热工研究院有限公司 Distributed photovoltaic power generation energy step adjusting device arranged in wind power plant

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