WO2018223631A1 - 一种应用于光伏发电的快速关断系统 - Google Patents

一种应用于光伏发电的快速关断系统 Download PDF

Info

Publication number
WO2018223631A1
WO2018223631A1 PCT/CN2017/114687 CN2017114687W WO2018223631A1 WO 2018223631 A1 WO2018223631 A1 WO 2018223631A1 CN 2017114687 W CN2017114687 W CN 2017114687W WO 2018223631 A1 WO2018223631 A1 WO 2018223631A1
Authority
WO
WIPO (PCT)
Prior art keywords
photovoltaic
junction box
power generation
contact
normally open
Prior art date
Application number
PCT/CN2017/114687
Other languages
English (en)
French (fr)
Inventor
严荣飞
姚圣杰
Original Assignee
江苏通灵电器股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江苏通灵电器股份有限公司 filed Critical 江苏通灵电器股份有限公司
Publication of WO2018223631A1 publication Critical patent/WO2018223631A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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

Definitions

  • the invention relates to the field of photovoltaic power generation, in particular to a fast shut-off system applied to photovoltaic power generation.
  • 2017NEC690.12 photovoltaic system safety standards stipulate that personnel enter the safety limits, requiring that the voltage of the connectable components should drop below 80V within 10 seconds. This requires us to provide a component-level fast shut-off device to cut off the connections between the components so that any two points in the system fall within that safe range.
  • a semiconductor switch is added to the photovoltaic junction box to turn off the component output by giving the semiconductor a signal when a critical situation occurs.
  • Taiwanese invention patent application (CN 105846758A, photovoltaic power generation system and shutdown device), which discloses a shutdown device when the photovoltaic inverter is turned off or fails
  • the photovoltaic inverter generates a first control signal; the shutdown device receives the first control signal to disconnect the photovoltaic array from the photovoltaic inverter.
  • the photovoltaic power generation system of the invention has high safety and reliability.
  • the shut-off device is connected with the photovoltaic inverter signal, for example, can be connected or wirelessly connected with the photovoltaic inverter circuit, thereby receiving the first control signal of the photovoltaic inverter and/or the second control signal.
  • the shutdown device can disconnect the electrical connection of the photovoltaic inverter to the photovoltaic array according to the first control signal.
  • the shutdown device can also restore the electrical connection between the photovoltaic inverter and the photovoltaic array according to the second control signal, thereby enabling the photovoltaic inverter to work normally, outputting electrical energy to the power grid or directly supplying the customer. (paragraphs 39 and 40 of the specification).
  • the structure that actually discloses the shutdown device includes a control circuit switching device and a power supply circuit.
  • the control circuit receives the first control signal and the second control signal to correspondingly control the switching device to open and close.
  • the switching device 42 includes at least one set of switches, wherein each set of switches is electrically coupled to a respective set of photovoltaic array units.
  • the actual definition of the shutdown device is a relay or a semiconductor switch (paragraphs 47-49 of the specification). Regardless of whether the shutdown device is a relay or a semiconductor switch, its relay is only placed between the PV inverter and the PV array. When the relay is turned off, the power generation components in the PV array still have a high residual voltage, much higher than 2017NEC690. Below 80V specified in .12. When the staff picks up There is still the risk of electric shock during touch and maintenance, and the safety performance is low. Assuming that the shutdown device is a semiconductor switch, the semiconductor switch is prone to failure when subjected to high temperatures, and the system cannot be secured.
  • the present invention is directed to the above problems, and provides a fast shutdown system for photovoltaic power generation with high safety and reliability.
  • the technical solution of the present invention is: a fast turn-off system applied to photovoltaic power generation, serially connected to a photovoltaic module array, comprising a quick turn-off photovoltaic junction box, the photovoltaic component array comprising a plurality of photovoltaic components, and the plurality of photovoltaic components After being connected in series, it is transported to the AC grid via the confluence/inverter box.
  • An AC power distribution system is arranged between the AC grid and the confluence/inverter box, and the adjacent PV modules are connected in series to quickly turn off the PV junction box. Shut down the photovoltaic module;
  • the AC power distribution system includes a main gate and a secondary gate.
  • the main gate is disposed between an AC power grid and a bus/inverter box, and the secondary gate includes a power converter, a manual switch, and an automatic switch, and the automatic switch and the automatic switch
  • the manual switches are respectively connected to a power converter, which is connected to quickly turn off the photovoltaic junction box.
  • the quick-cut photovoltaic junction box comprises a normally open contact 1 and a magnet wire package.
  • the electromagnetic wire package is connected to a power converter, and the movable contact of the normally open contact and the static open contact are static.
  • the contacts are respectively connected to adjacent photovoltaic modules.
  • the fast-cut photovoltaic junction box is integrally fabricated with a photovoltaic assembly, the photovoltaic assembly including a power generation assembly and a bypass diode module connected in parallel to the power generation assembly;
  • the quick-shutdown photovoltaic junction box includes a normally-opening contact 2 and a magnetizing wire package 2, and the normally-opening contacts 2 are respectively connected to adjacent bypass diode modules, and the electromagnetic wire package 2 is connected to the power converter.
  • the quick-cut photovoltaic junction box comprises a normally open contact three, a magnetic wire package three and a normally closed contact, and the normally open contact three and the normally closed contact are linked with the electromagnetic wire package three;
  • the quick-cut photovoltaic junction box can be connected in series between adjacent photovoltaic modules, and the photovoltaic junction box can be quickly turned off in series between each two photovoltaic components based on the voltage level of the components.
  • the component-level quick-cut photovoltaic junction box is externally connected to the original photovoltaic module, and does not change the structure of the original photovoltaic component, and is convenient for retrofitting the existing photovoltaic component, thereby improving safety and another In terms, the photovoltaic module does not need to be replaced as a whole, which saves costs.
  • the quick-cut PV junction box can be quickly turned off, so that adjacent PV modules are separated from each other, ensuring that the residual voltage of the PV module can be In the shortest time, it will fall within the safe range to ensure the personal safety of the maintenance personnel.
  • the main gate is in the off state, the power converter is not energized, resulting in a quick turn-off of the junction box. That is to say, as long as the entire system fails, the various PV modules will be disconnected, and the linkage with the grid will be realized to the maximum extent. When the grid is lost due to power failure, the PV modules will also be disconnected quickly, in a very short time.
  • Photovoltaic system safety standards stipulate that personnel enter the safety limits, requiring the voltage of the connectable components to drop below 80V within 10 seconds) so that personal safety and accidents can be reduced when personnel enter.
  • the high-temperature failure of the semiconductor switch is adopted, and the electromagnetic switch is adopted in the present case, as long as the photovoltaic component is powered off (whether it is a high temperature power failure or a power failure due to other reasons), the electromagnetic switch can be quickly and timely made. Respond to ensure personal safety.
  • an electromagnetic switch is arranged between the inverter and the photovoltaic power generation component.
  • FIG. 1 is a schematic structural view of a first embodiment of the present invention
  • FIG. 2 is a schematic structural view of a quick turn-off junction box according to an embodiment of the present invention.
  • Embodiment 2 of the present invention is a schematic structural view of Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural view of a quick turn-off junction box according to Embodiment 2 of the present invention.
  • Figure 5 is a schematic structural view of a third embodiment of the present invention.
  • FIG. 6 is a schematic structural view of a fast optical end photovoltaic junction box in Embodiment 3 of the present invention.
  • Figure 7 is a schematic view showing the structure of the prior art
  • 1 is a photovoltaic module
  • 11 is a power generation component
  • 12 is a bypass diode module
  • 2 is a convergence inverter box
  • 3 is an AC power grid
  • 4 is an AC power distribution system
  • 41 is a main gate
  • 42 is a secondary gate
  • 421 is Power converter
  • 422 is manual switch
  • 423 is automatic switch
  • 5 is fast turn off photovoltaic junction box
  • 51 is normally open contact one
  • 52 is electromagnetic wire package one
  • 53 is normally open contact two
  • 54 is electromagnetic wire Package two
  • 55 is the normally open contact three
  • 56 is the electromagnetic wire package three.
  • 57 is a normally closed contact.
  • Figure 1-6 shows a rapid shutdown system for photovoltaic power generation, connected in series with a photovoltaic module, including a quick turn-off photovoltaic junction box, the photovoltaic module array comprising a plurality of photovoltaic modules 1, a plurality of The photovoltaic modules 1 are connected in series and then sent to the AC grid 3 via the combiner/inverter box 2.
  • An AC power distribution system 4 is disposed between the AC grid 3 and the bus/inverter box, and the adjacent PV modules are connected.
  • the photovoltaic junction box 5 is quickly turned off to turn off the photovoltaic module.
  • the AC grid can be either an AC grid or a regional grid (a transformer station or a large enterprise internal grid).
  • the quick-cut photovoltaic junction box can be connected in series between adjacent photovoltaic modules or can be connected in series to quickly close the photovoltaic junction box between every two photovoltaic components based on the voltage level of the component.
  • the component-level quick-cut photovoltaic junction box is externally connected to the original photovoltaic module, and does not change the structure of the original photovoltaic component, and is convenient for retrofitting the existing photovoltaic component, thereby improving safety and another In terms, the photovoltaic module does not need to be replaced as a whole, which saves costs.
  • the quick-cut PV junction box can be quickly turned off, so that adjacent PV modules are separated from each other, ensuring that the residual voltage of the PV module can be In the shortest time, it falls to the safe range to ensure the personal safety of the maintenance personnel.
  • Setting the quick-cut photovoltaic junction box in each or every two PV modules can make the residual voltage in the adjacent PV modules rapidly decrease, and Figure 7 Compared with the prior art shown, the prior art only has a main gate between the confluence inverter box and the AC grid.
  • the present invention is in the photovoltaic module.
  • a quick-cut photovoltaic junction box is provided to separate adjacent photovoltaic modules from each other, ensuring that the residual voltage of the photovoltaic module can be lowered into a safe range in a short period of time, and the safety performance is higher.
  • the AC power distribution system 4 includes a main gate 41 and a secondary gate 42.
  • the main gate 41 is disposed between the AC power grid and the bus/inverter box 2, and the secondary gate 42 includes a power converter 421, a manual switch 422, and An automatic switch 423 is connected to the power converter 421, respectively, which is connected to the quick turn-off photovoltaic junction box.
  • the power converter When the main gate is in the off state, the power converter is not energized, resulting in a quick turn-off of the junction box. That is to say, as long as the entire system fails, the various PV modules will be disconnected, and the linkage with the grid will be realized to the maximum extent. When the grid is lost due to power failure, the PV modules will also be disconnected quickly, in a very short time. It can reduce the residual voltage in the PV module to a safe range (2017NEC690.12 Photovoltaic system safety standard stipulates that personnel enter the safety limit, requiring the voltage of the connectable component to drop below 80V within 10 seconds) It can protect personal safety and reduce accidents.
  • the fast-cut photovoltaic junction box adopts an electromagnetic switch, which is more stable than the semiconductor switch in a high temperature state, and avoids the disadvantages of the semiconductor switch failing at a high temperature state, and has better stability.
  • the quick-cut photovoltaic junction box 5 includes a normally open contact 51 and a magnet wire package 52, and the electromagnetic wire package 52 is connected to a power converter 421, the normally open contact.
  • the movable contacts of one 51 and the stationary contacts of the normally open contacts are respectively connected to adjacent photovoltaic modules.
  • the power converter and the electromagnetic wire package are all powered, and the normally open contact associated with the electromagnetic wire package is actuated, and the normally open contact is closed, so that the photovoltaic modules are connected in series to form a photovoltaic module array.
  • the main gate is disconnected, the power converter and the electromagnetic wire package are lost, and the normally open contact is restored to the normally open state. Relatively independent disconnection, the residual pressure of the photovoltaic module is rapidly reduced to a safe range, providing safety for the construction personnel entering the site, fire emergency personnel, and the like.
  • This kind of quick-shutdown system is externally connected to the original photovoltaic module, does not change the structure of the original photovoltaic module, and is convenient for retrofitting the existing photovoltaic module already installed, on the one hand, the safety is improved, on the other hand, it is not required.
  • the photovoltaic module is replaced as a whole, saving costs.
  • a secondary brake is also arranged on the main gate, and the power converter is separately controlled by the manual switch and the automatic switch, so that the inspection is performed.
  • the repair personnel need to actively disconnect and perform maintenance to manually control the PV modules.
  • the residual pressure in the photovoltaic module is rapidly reduced, the operation and maintenance process is accelerated, and the work efficiency is improved.
  • the fast-cut photovoltaic junction box 5 is integrally fabricated with a photovoltaic module 1, the photovoltaic module 1 comprising a power generation assembly 11 and a bypass diode module 12 connected in parallel with the power generation assembly;
  • the quick-cut photovoltaic junction box 5 includes a normally-opening contact two 53 and a magnetizing wire package 254, wherein the normally-opening contacts 2 are respectively connected to adjacent bypass diode modules, and the electromagnetic wire package 2 is connected to the power supply. Converter. It can further simplify wiring and reduce the size of the entire device for easy installation and use.
  • the quick-cut photovoltaic junction box 5 includes a normally open contact three 55, a magnet wire package 56 and a normally closed contact 57, the normally open contact three 55 and a normally closed contact. 57 linkage with the electromagnetic wire package three 56;
  • the electromagnetic wire package is connected to the power converter, and the movable contact of the normally open contact three and the static contact of the normally open contact 3 are respectively connected to adjacent photovoltaic components, and one end of the photovoltaic component is connected to the ground end.
  • a normally closed contact is provided between the photovoltaic module and the ground.
  • the main gate is disconnected, or it can be manually disconnected by a manual switch, or it can be automatically disconnected by an automatic switch, so that the power converter loses power, so that the electromagnetic wire package is three
  • the power is off
  • the normally open contact three and the normally closed contact are restored to the initial state, that is, the normally open contact three is restored to the off state, and some of the photovoltaic components are restored to a relatively independent state, and the normally closed contact is restored to the closed state, so that the independence is independent.
  • the photovoltaic module in the state forms a loop with the grounding end, and the residual voltage in the photovoltaic module can be quickly led out through the grounding end, so that the residual voltage of the photovoltaic module is rapidly decreased.
  • the residual voltage is passed through the grounding end. Export and consume, making the buck faster. Increased security and productivity.

Landscapes

  • Photovoltaic Devices (AREA)

Abstract

一种应用于光伏发电的快速关断系统，涉及光伏发电领域，串接于光伏组件阵列中，包括快速关断光伏接线盒（5），所述光伏组件阵列包括若干光伏组件（1），若干所述光伏组件（1）串联连接后经由汇流/逆变箱（2）输送至交流电网（3），交流电网（3）和汇流/逆变箱（2）之间设有交流配电系统（4），相邻的所述光伏组件（1）之间串接快速关断光伏接线盒（5），用于关断光伏组件（1）；所述交流配电系统（4）包括主闸（41）和副闸（42），所述主闸（41）设于交流电网（3）和汇流/逆变箱（2）之间，所述副闸（42）包括电源变换器（421）、手动开关（422）和自动开关（423），所述自动开关（423）和手动开关（422）分别连接电源变换器（421），所述电源变换器（421）连接快速关断光伏接线盒（5）。该系统从整体上具有安全性高、稳定性好的优点。

Description

一种应用于光伏发电的快速关断系统 技术领域
本发明涉及光伏发电领域，尤其涉及一种应用于光伏发电的快速关断系统。
背景技术
如今光伏发电已经被广泛应用，但是有一个问题越来越多地困绕着人们，就是当光伏电站系统出现故障需要进入维修时，或者出现如地震、火灾、水灾等需要救助人员进入时，即使关断电网供电，由于光伏组件仍然在发电，系统中仍然存在可能危及人生安全的高压电能。
为此，2017NEC690.12光伏系统安全标准中规定人员进入安全界限内，要求可触接的组件电压应在10秒内下降到80V以下。这就需要我们提供一个组件级快速关断装置，来切断各组件间的连接，使系统中任意两点电压降到那安全范围以内。
为满足以上要求，业界有推出智能光伏接线盒方案。在光伏接线盒中增加半导体开关，当危急情形出现时，通过给半导体开关一个信号，来关断组件输出。
然而，实际应用和理论分析发现，上述半导体开关方案仍然存在严重的问题。由于半导体开关的特性，当遇到火灾等高温情形时，半导体开关会呈导通状态，使得上述“关断”失效，无法为系统提供安全保障。
国家知识产权局2016-8-10公开了一项中国台湾的发明专利申请(CN 105846758A，光伏发电系统及关断装置)，其中公开了一种关断装置所述光伏逆变器关闭或故障时，所述光伏逆变器产生第一控制信号；所述关断装置接收所述第一控制信号以断开所述光伏阵列与所述光伏逆变器。本发明的光伏发电系统具有较高的安全性和可靠性。并实际公开了关断装置的结构，关断装置与光伏逆变器信号连接，例如可以与光伏逆变器电路连接或无线连接，从而接收光伏逆变器的第一控制信号和/或第二控制信号。关断装置可根据第一控制信号断开光伏逆变器与光伏阵列的电连接。关断装置还可根据第二控制信号恢复光伏逆变器与光伏阵列的电连接，从而使光伏逆变器正常工作，输出电能至电网或者直接供给客户使用。(说明书第39段和第40段)。且实际公开了关断装置的结构包括控制电路开关装置和供电电路。控制电路接收所述第一控制信号和所述第二控制信号，以相应控制开关装置断开和闭合。开关装置42包括至少一组开关，其中每组开关分别电连接于一组相对应的光伏阵列单元。且实际限定了关断装置为继电器或半导体开关(说明书第47-49段)。不管关断装置为继电器或半导体开关时，其继电器仅设置在光伏逆变器和光伏阵列之间，当继电器关断时，光伏阵列中的发电组件仍具有很高残压，远远高于2017NEC690.12中规定的80V以下。当人员接 触和检修时仍然有触电的危险，安全性能低。假定关断装置为半导体开关，那么在遇到高温时半导体开关容易失效，无法为系统提供安全保障。
发明内容
本发明针对以上问题，提供了一种具有高安全性和可靠性的应用于光伏发电的快速关断系统。
本发明的技术方案是：一种应用于光伏发电的快速关断系统，串接于光伏组件阵列中，包括快速关断光伏接线盒，所述光伏组件阵列包括若干光伏组件，若干所述光伏组件串联连接后经由汇流/逆变箱输送至交流电网，交流电网和汇流/逆变箱之间设有交流配电系统，相邻的所述光伏组件之间串接快速关断光伏接线盒，用于关断光伏组件；
所述交流配电系统包括主闸和副闸，所述主闸设于交流电网和汇流/逆变箱之间，所述副闸包括电源变换器、手动开关和自动开关，所述自动开关和手动开关分别连接电源变换器，所述电源变换器连接快速关断光伏接线盒。
所述快速关断光伏接线盒包括常开触点一和电磁线包一，所述电磁线包一连接电源变换器，所述常开触点一的动触头和常开触点一的静触头分别连接相邻的光伏组件。
所述快速关断光伏接线盒与光伏组件一体制造，所述光伏组件包括发电组件和并联于所述发电组件上的旁路二极管模块；
所述快速关断光伏接线盒包括常开触点二和电磁线包二，所述常开触点二分别连接在相邻的旁路二极管模块上，所述电磁线包二连接电源变换器。
所述快速关断光伏接线盒包括常开触点三、电磁线包三和常闭触点，所述常开触点三和常闭触点与电磁线包三联动；
本发明中快速关断光伏接线盒可以串接在相邻的光伏组件之间也可以基于组件的电压等级在每两个光伏组件之间串接快速关断光伏接线盒。这种组件级快速关断光伏接线盒属于外接在原有的光伏组件上，不会改变原有光伏组件的结构，便于对已经安装现有的光伏组件进行改造，一方面提升了安全性，另一方面，不需要将光伏组件整体替换，节约了成本。
在光伏组件阵列发生故障需要检修或者在发生重大自然灾害导致光伏组件阵列损坏时，快速关断光伏接线盒能够实现快速关断，使得相邻的光伏组件相互隔断，确保光伏组件的残压能够在最短的时间内下降到安全范围内，保障检修人员的人身安全。当主闸处于断开状态时，电源变换器不得电，导致快速关断接线盒失电断开。也就是说只要整个系统出现故障断电，各个光伏组件就会断开，在最大限度上实现与电网联动，当电网由于故障失电后光伏组件之间也会迅速断开，在极短时间内就能够使得光伏组件内的残压下降到安全范围 (2017NEC690.12光伏系统安全标准中规定人员进入安全界限内，要求可触接的组件电压应在10秒内下降到80V以下)这样在人员进入时就能够保障人身安全，减少事故发生。相比较于现有技术中采用半导体开关高温失效的状况，本案中采用电磁式开关，只要光伏组件断电(不管是高温断电还是因为其他原因断电)，电磁式开关均能够及时快速做出反应，确保人身安全。相比较于现有技术中在逆变器与光伏发电组件之间设置电磁式开关，本案中在每个串联的光伏组件上均有电磁开关，在断电时能够使得光伏组件相互独立，确保光伏组件中残压能够迅速降低，保证人身安全，安全性和稳定性更高。本发明从整体上具有安全性高、稳定性好的优点。
附图说明
图1是本发明实施例一结构示意图，
图2是本发明实施例一快速关断接线盒结构示意图，
图3是本发明中实施例二结构示意图，
图4是本发明实施例二快速关断接线盒结构示意图，
图5是本发明中实施例三结构示意图，
图6是本发明中实施例三中快速光端光伏接线盒结构示意图，
图7是现有技术结构示意图；
图中1是光伏组件，11是发电组件，12是旁路二极管模块，2是汇流逆变箱，3是交流电网，4是交流配电系统，41是主闸，42是副闸，421是电源变换器，422是手动开关，423是自动开关，5是快速关断光伏接线盒，51是常开触点一，52是电磁线包一，53是常开触点二，54是电磁线包二，55是常开触点三。56是电磁线包三。57是常闭触点。
具体实施方式
本发明如图1-6所示，一种应用于光伏发电的快速关断系统，串接于光伏组件阵列中，包括快速关断光伏接线盒，所述光伏组件阵列包括若干光伏组件1，若干所述光伏组件1串联连接后经由汇流/逆变箱2输送至交流电网3，交流电网3和汇流/逆变箱之间设有交流配电系统4，相邻的所述光伏组件之间串接快速关断光伏接线盒5，用于关断光伏组件。交流电网可以是交流市电网，也可以是区域电网(一个变压器台区或者大型企业内部电网)。
快速关断光伏接线盒可以串接在相邻的光伏组件之间也可以基于组件的电压等级在每两个光伏组件之间串接快速关断光伏接线盒。这种组件级快速关断光伏接线盒属于外接在原有的光伏组件上，不会改变原有光伏组件的结构，便于对已经安装现有的光伏组件进行改造，一方面提升了安全性，另一方面，不需要将光伏组件整体替换，节约了成本。
在光伏组件阵列发生故障需要检修或者在发生重大自然灾害导致光伏组件阵列损坏时，快速关断光伏接线盒能够实现快速关断，使得相邻的光伏组件相互隔断，确保光伏组件的残压能够在最短的时间内下降到安全范围内，保障检修人员的人身安全，在每个或每两个光伏组件件设置快速关断光伏接线盒能够使得相邻的光伏组件中残压迅速降低，与图7所示现有技术相比，现有技术仅在汇流逆变箱与交流电网之间设有主闸，在光伏组件损坏时组件自身仍然具有较高残压，安全性差，而本案在光伏组件之间设快速关断光伏接线盒，使得相邻的光伏组件相互隔断，确保光伏组件的残压能够在最短的时间内下降到安全范围内，安全性能更高。
所述交流配电系统4包括主闸41和副闸42，所述主闸41设于交流电网和汇流/逆变箱2之间，所述副闸42包括电源变换器421、手动开关422和自动开关423，所述自动开关423和手动开关422分别连接电源变换器421，所述电源变换器连接快速关断光伏接线盒。
当主闸处于断开状态时，电源变换器不得电，导致快速关断接线盒失电断开。也就是说只要整个系统出现故障断电，各个光伏组件就会断开，在最大限度上实现与电网联动，当电网由于故障失电后光伏组件之间也会迅速断开，在极短时间内就能够使得光伏组件内的残压下降到安全范围(2017NEC690.12光伏系统安全标准中规定人员进入安全界限内，要求可触接的组件电压应在10秒内下降到80V以下)这样在人员进入时就能够保障人身安全，减少事故发生。快速关断光伏接线盒采用电磁式开关，在高温状态下比半导体开关更加稳定，避免了半导体开关在高温状态下失效的弊端，稳定性更好。
实施例1
如图1-2所示，所述快速关断光伏接线盒5包括常开触点一51和电磁线包一52，所述电磁线包一52连接电源变换器421，所述常开触点一51的动触头和常开触点一的静触头分别连接相邻的光伏组件。
光伏组件阵列正常发电时，电源变换器和电磁线包一均得电，与电磁线包一关联的常开触点一动作，常开触点一闭合，使得各个光伏组件串联成光伏组件阵列，实现发电功能，当发生故障需要检修或遇到不可抗力发生断路事故时，主闸断开，电源变换器和电磁线包一失电，常开触点一恢复到常开状态，此时各个光伏组件相对独立断开，使得光伏组件的残压迅速下降到安全范围，为进入场所的施工人员，消防急救人员等提供了安全保障。这种快速关断系统属于外接在原有的光伏组件上，不会改变原有光伏组件的结构，便于对已经安装现有的光伏组件进行改造，一方面提升了安全性，另一方面，不需要将光伏组件整体替换，节约了成本。在主闸上还设置了副闸，利用手动开关和自动开关分别控制电源变换器，这样当检 修人员需要主动断开进行维护时就能够手动控制光伏组件。使得光伏组件内的残压迅速下降，加速运维检修进程，提高工作效率。
实施例2
如图3-4所示，所述快速关断光伏接线盒5与光伏组件1一体制造，所述光伏组件1包括发电组件11和并联于所述发电组件上的旁路二极管模块12；
所述快速关断光伏接线盒5包括常开触点二53和电磁线包二54，所述常开触点二分别连接在相邻的旁路二极管模块上，所述电磁线包二连接电源变换器。能够进一步简化接线，减小整个装置的体积，便于安装和使用。
实施例3
如图5-6所示，所述快速关断光伏接线盒5包括常开触点三55、电磁线包三56和常闭触点57，所述常开触点三55和常闭触点57与电磁线包三56联动；
所述电磁线包三连接电源变换器，所述常开触点三的动触头和常开触点三的静触头分别连接相邻的光伏组件，所述光伏组件一端连接接地端，所述光伏组件和接地端之间设有常闭触点。当光伏组件正常发电时，电源变换器得电，电磁线包三也得电，常开触点三和常闭触点动作，常开触点三闭合，使得若干光伏组件相连，同时常闭触点断开，使得光伏组件和接地端断开，确保光伏组件与交流电网形成通路，向交流电网供电。当发生故障需要检修或遇到不可抗力发生断路事故时，主闸断开，或者可以通过手动开关手动断开，又或者可以通过自动开关自动断开，使得电源变换器失电，这样电磁线包三也就失电，常开触点三和常闭触点恢复初始状态，即常开触点三恢复断开状态，若干光伏组件恢复到相对独立状态，常闭触点恢复到闭合状态，使得独立状态下的光伏组件与接地端形成回路，光伏组件内的残压能够迅速通过接地端导出，使得光伏组件的残压迅速下降，与实施例一和实施例二相比，通过接地端将残压导出并消耗，使得降压速度更快。提高了安全性和工作效率。

Claims (5)

  1. 一种应用于光伏发电的快速关断系统，串接于光伏组件阵列中，其特征在于，包括快速关断光伏接线盒，所述光伏组件阵列包括若干光伏组件，若干所述光伏组件串联连接后经由汇流/逆变箱输送至交流电网，交流电网和汇流/逆变箱之间设有交流配电系统，相邻的所述光伏组件之间串接快速关断光伏接线盒，用于关断光伏组件。
  2. 根据权利要求1所述的一种应用于光伏发电的快速关断系统，其特征在于，所述交流配电系统包括主闸和副闸，所述主闸设于交流电网和汇流/逆变箱之间，所述副闸包括电源变换器、手动开关和自动开关，所述自动开关和手动开关分别连接电源变换器，所述电源变换器连接快速关断光伏接线盒。
  3. 根据权利要求2所述的一种应用于光伏发电的快速关断系统，其特征在于，所述快速关断光伏接线盒包括常开触点一和电磁线包一，所述电磁线包一连接电源变换器，所述常开触点一的动触头和常开触点一的静触头分别连接相邻的光伏组件。
  4. 根据权利要求2所述的一种应用于光伏发电的快速关断系统，其特征在于，所述快速关断光伏接线盒与光伏组件一体制造，所述光伏组件包括发电组件和并联于所述发电组件上的旁路二极管模块；
    所述快速关断光伏接线盒包括常开触点二和电磁线包二，所述常开触点二分别连接在相邻的旁路二极管模块上，所述电磁线包二连接电源变换器。
  5. 根据权利要求2所述的一种应用于光伏发电的快速关断系统，其特征在于，所述快速关断光伏接线盒包括常开触点三、电磁线包三和常闭触点，所述常开触点三和常闭触点与电磁线包三联动；
    所述电磁线包三连接电源变换器，所述常开触点三的动触头和常开触点三的静触头分别连接相邻的光伏组件，所述光伏组件一端连接接地端，所述光伏组件和接地端之间设有常闭触点。
PCT/CN2017/114687 2017-06-07 2017-12-06 一种应用于光伏发电的快速关断系统 WO2018223631A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710422842.X 2017-06-07
CN201710422842.XA CN107425808A (zh) 2017-06-07 2017-06-07 一种应用于光伏发电的快速关断系统

Publications (1)

Publication Number Publication Date
WO2018223631A1 true WO2018223631A1 (zh) 2018-12-13

Family

ID=60429675

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/114687 WO2018223631A1 (zh) 2017-06-07 2017-12-06 一种应用于光伏发电的快速关断系统

Country Status (2)

Country Link
CN (1) CN107425808A (zh)
WO (1) WO2018223631A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110033966A (zh) * 2019-04-20 2019-07-19 国网湖北省电力有限公司咸宁供电公司 失压断网闭锁装置
CN113381388A (zh) * 2020-03-09 2021-09-10 台达电子企业管理（上海）有限公司 用于光伏系统的快速关断装置及其控制方法、保护系统

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107425808A (zh) * 2017-06-07 2017-12-01 江苏通灵电器股份有限公司 一种应用于光伏发电的快速关断系统
CN109075738A (zh) * 2018-02-05 2018-12-21 苏州谐通光伏科技股份有限公司 光伏组件阵列关断系统
CN108886339A (zh) * 2018-04-13 2018-11-23 苏州谐通光伏科技股份有限公司 光伏组件阵列关断装置
CN108565891B (zh) * 2018-04-26 2021-02-12 厦门科华恒盛电力能源有限公司 一种光伏组串关断装置、方法及光伏系统
CN108599713B (zh) * 2018-05-31 2019-06-18 苏州同泰新能源科技有限公司 多通道电源管理模块
CN110797907A (zh) * 2018-08-03 2020-02-14 浙江昱能科技有限公司 一种具有安全保护功能的光伏系统
CN111835279A (zh) * 2019-04-16 2020-10-27 博发电子股份有限公司 太阳能电池系统、其快速关闭控制电路与方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010078303A2 (en) * 2008-12-29 2010-07-08 Atonometrics, Inc. Electrical safety shutoff system and devices for photovoltaic modules
CN101951190A (zh) * 2010-09-08 2011-01-19 陈文良 可以电隔离的光伏组件和电隔离方法
CN204031043U (zh) * 2014-08-28 2014-12-17 常州天合光能有限公司 具有智能关断功能的光伏系统
CN107425808A (zh) * 2017-06-07 2017-12-01 江苏通灵电器股份有限公司 一种应用于光伏发电的快速关断系统
CN206759389U (zh) * 2017-06-07 2017-12-15 江苏通灵电器股份有限公司 应用于光伏发电的快速关断系统

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105024639A (zh) * 2014-04-22 2015-11-04 江苏通灵电器股份有限公司 一种光伏组件主回路保护方法
CN105846758A (zh) * 2015-01-16 2016-08-10 台达电子工业股份有限公司 光伏发电系统及关断装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010078303A2 (en) * 2008-12-29 2010-07-08 Atonometrics, Inc. Electrical safety shutoff system and devices for photovoltaic modules
CN101951190A (zh) * 2010-09-08 2011-01-19 陈文良 可以电隔离的光伏组件和电隔离方法
CN204031043U (zh) * 2014-08-28 2014-12-17 常州天合光能有限公司 具有智能关断功能的光伏系统
CN107425808A (zh) * 2017-06-07 2017-12-01 江苏通灵电器股份有限公司 一种应用于光伏发电的快速关断系统
CN206759389U (zh) * 2017-06-07 2017-12-15 江苏通灵电器股份有限公司 应用于光伏发电的快速关断系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110033966A (zh) * 2019-04-20 2019-07-19 国网湖北省电力有限公司咸宁供电公司 失压断网闭锁装置
CN113381388A (zh) * 2020-03-09 2021-09-10 台达电子企业管理（上海）有限公司 用于光伏系统的快速关断装置及其控制方法、保护系统

Also Published As

Publication number Publication date
CN107425808A (zh) 2017-12-01

Similar Documents

Publication Publication Date Title
WO2018223631A1 (zh) 一种应用于光伏发电的快速关断系统
CN102217078B (zh) 太阳能模块
JP5903439B2 (ja) 中電圧送電網へ電力を供給するための太陽光発電設備の運転方法
CN101350535B (zh) 不间断电源
US20180006601A1 (en) Rapid de-energization of DC conductors with a power source at both ends
US9912160B2 (en) Method for safe isolation and reconnect of grid generation devices to energy storage or alternate generation reference
CN203504285U (zh) Ups综合电源
CN201699472U (zh) 一种双电源自动切换电路及其隔离装置
CN110350651A (zh) 110kV单母线故障的备自投防误动方法
JP2020061850A (ja) 発電制御システム、発電制御方法及びプログラム
US10388802B2 (en) System and method for synchronized rapid shutdown of electrical devices
CN110021486A (zh) 一种失压脱扣自动重合闸装置
CN206759389U (zh) 应用于光伏发电的快速关断系统
CN208608730U (zh) 船用岸电相序自动转换装置
CN208241399U (zh) 具有自供电直流控制备选控制系统的智能高低压成套设备
CN102545370A (zh) 风力发电机的控制系统供电装置
CN202798126U (zh) 一种plc不间断供电自动切换系统
CN105575616B (zh) 变压器自动冷却系统
CN104092281B (zh) 一种交流双电源切换方法
CN204304453U (zh) 一种水冷型svg设备的联锁保护结构
CN203691293U (zh) 矿用隔爆兼本质安全型双接触器低压交流软起动器
CN210608675U (zh) 一种核电站双电源切换控制电路、切换装置和供电系统
CN215733639U (zh) 太阳能不间断电源装置
CN207965617U (zh) 一种整流变压器油风冷电源安保装置
CN208369307U (zh) 一种换流变压冷却器外接电源控制装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17912874

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17912874

Country of ref document: EP

Kind code of ref document: A1