WO2022193854A1 - Système photovoltaïque, ensemble photovoltaïque, gestionnaire local et procédé d'exploitation de système photovoltaïque - Google Patents

Système photovoltaïque, ensemble photovoltaïque, gestionnaire local et procédé d'exploitation de système photovoltaïque Download PDF

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Publication number
WO2022193854A1
WO2022193854A1 PCT/CN2022/074459 CN2022074459W WO2022193854A1 WO 2022193854 A1 WO2022193854 A1 WO 2022193854A1 CN 2022074459 W CN2022074459 W CN 2022074459W WO 2022193854 A1 WO2022193854 A1 WO 2022193854A1
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WO
WIPO (PCT)
Prior art keywords
photovoltaic
local manager
photovoltaic system
inverter
operation signal
Prior art date
Application number
PCT/CN2022/074459
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English (en)
Chinese (zh)
Inventor
许涛
杨智
Original Assignee
苏州阿特斯阳光电力科技有限公司
常熟阿特斯阳光电力科技有限公司
阿特斯阳光电力集团股份有限公司
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Filing date
Publication date
Priority claimed from CN202111674690.5A external-priority patent/CN115117846A/zh
Application filed by 苏州阿特斯阳光电力科技有限公司, 常熟阿特斯阳光电力科技有限公司, 阿特斯阳光电力集团股份有限公司 filed Critical 苏州阿特斯阳光电力科技有限公司
Publication of WO2022193854A1 publication Critical patent/WO2022193854A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/12—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to undesired approach to, or touching of, live parts by living beings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • 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
    • H02S40/32—Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules

Definitions

  • the invention relates to a photovoltaic system, a photovoltaic component, a local manager and a photovoltaic system operating method, and belongs to the photovoltaic technical field.
  • the purpose of the present invention is to provide a photovoltaic system, which can cut off the circuit in the system at any time, so that the maximum output voltage of the photovoltaic system is reduced to the safety voltage of the human body, so as to ensure that construction personnel are not shocked by high voltage.
  • the present invention provides a photovoltaic system, comprising a photovoltaic component, a local manager, a main controller and an inverter, the inverter and the photovoltaic component are electrically connected through a main line, and the local manager One end is connected to the photovoltaic module, and the other end is connected to the main line to control the turn-on or turn-off between the photovoltaic module and the inverter, the local manager is connected to the main controller in communication, so that the The local manager starts within a set time period after receiving the allowable operation signal sent by the main controller, so that the photovoltaic modules output normal voltage to the inverter, and in the non-set time period, the local manager will The module is disconnected from the main line or the output voltage of the PV module is reduced.
  • the set time period is between the time point T1 and T2 after the local manager receives the operation permission signal sent by the main controller, wherein T2 is later than T1.
  • the local manager when there are multiple operating permission signals, starts between the time points T1 and T2 after receiving each operating permission signal sent by the main controller, so that the photovoltaic modules A normal voltage is output to the inverter; and the local manager disconnects the photovoltaic module from the main line or reduces the output voltage of the photovoltaic module when not between any time points T1 and T2 of the allowable operation signal.
  • the allowable operation signal is transmitted periodically, and the transmission period is ⁇ T ⁇ (T2-T1).
  • T1 is 0-30S after the local manager receives the allowable operation signal
  • T2 is 0.1-60S after the local manager receives the allowable operation signal.
  • the operation permission signal is transmitted periodically, and the transmission period is ⁇ T>(T2-T1), and within a transmission period of the operation permission signal, the local manager sends the photovoltaic module Disconnect or reduce the output voltage of the PV modules from the main line.
  • T1 is 0-30S after the local manager receives the allowable operation signal
  • T2 is 0.1-60S after the local manager receives the allowable operation signal.
  • the values of T1 and T2 are both set by the local manager; or, the values of T1 and T2 are both set by the master controller transmitting the settings to the local manager.
  • the values of T1 and T2 are fixed; or, the values of T1 and T2 are not fixed.
  • the local manager includes a signal receiving end connected with the main controller and a switch connected with the signal receiving end, and the signal receiving end is used for receiving the operation permission signal sent by the main controller, And control the switch to close or open between T1 and T2 after receiving the allowable operation signal, so that the photovoltaic module is connected to the main line and outputs a normal voltage to the inverter, and at a non-set time In the section, the switch is controlled to open or close, so that the photovoltaic assembly is disconnected from the main line or the output voltage of the photovoltaic assembly is reduced.
  • the switch is connected in series with the photovoltaic module, and when the signal receiving end controls the switch to be closed, the photovoltaic module is connected to the main line and outputs a normal voltage to the inverter , when the signal receiving end controls the switch to be turned on, the photovoltaic assembly is disconnected from the main line.
  • the switch is connected in parallel with the photovoltaic module.
  • the photovoltaic module When the signal receiving end controls the switch to be turned on, the photovoltaic module outputs a normal voltage to the inverter.
  • the switch When the switch is controlled to be closed, the photovoltaic module outputs a low voltage to the inverter.
  • the local manager includes a signal receiving end connected with the main controller and a voltage regulating device connected with the signal receiving end, and the signal receiving end is used for receiving the operation permission sent by the main controller signal, and control the voltage regulating device between the time points T1 and T2 after receiving the operating permit signal, so that the photovoltaic module is connected to the main line and outputs the normal voltage to the inverter, and when the non-setting During the time period, the voltage regulating device is controlled to reduce the output voltage of the photovoltaic module.
  • the voltage regulating device is a DC/DC power converter.
  • the main controller is arranged in the inverter.
  • Another object of the present invention is to provide a photovoltaic assembly, which is applied to the aforementioned photovoltaic system, and the photovoltaic assembly is provided with the local manager.
  • the photovoltaic assembly includes a photovoltaic laminate and a frame around the photovoltaic laminate, and the local manager is provided on the frame or the photovoltaic laminate.
  • Another object of the present invention is to provide a local manager, which is applied to the aforementioned photovoltaic system.
  • Another object of the present invention is to provide an operating method of a photovoltaic system, which reduces the judgment process, is simple, easy to implement, and has higher reliability.
  • the present invention provides an operating method of a photovoltaic system, which is applied to the aforementioned photovoltaic system.
  • the operating method of the photovoltaic system mainly includes the following steps:
  • the local manager When the local manager receives the allowable operation signal from the main controller, within the set time period, the local manager starts, and the PV modules output normal voltage to the inverter; in the non-set time period, the local manager Disconnect the PV module from the main line or reduce the output voltage of the PV module.
  • the beneficial effect of the present invention is that: the photovoltaic system of the present invention can control the photovoltaic modules to output normal voltage to the inverter within the set time period after the main controller sends out the allowable operation signal, and in the non-set time period Inside, the local manager disconnects the photovoltaic modules from the main line or reduces the output voltage of the photovoltaic modules, so that the photovoltaic system of the present invention can reduce the maximum output voltage of the photovoltaic system to Human body safety voltage to ensure that construction workers are not shocked by high voltage.
  • FIG. 1 is a first structural schematic diagram of the photovoltaic system of the present invention.
  • FIG. 2 is a diagram showing the relationship between the allowable operation signal and the on-off state of the photovoltaic module in the present invention.
  • FIG. 3 is a waveform diagram of the first on-off state of the photovoltaic module after the main controller in FIG. 1 sends a signal to allow operation.
  • FIG. 4 is a waveform diagram of the second on-off state of the photovoltaic module after the main controller in FIG. 1 sends a signal to allow operation.
  • FIG. 5 is a flowchart of an operation method of the photovoltaic system shown in FIG. 1 .
  • the present invention discloses a photovoltaic system, including photovoltaic components, a local manager, a main controller and an inverter, wherein the inverter and the photovoltaic components are electrically connected through a main line, and the local manager’s One end is connected to the photovoltaic module, and the other end is connected to the main line, so as to facilitate the control of on or off between the photovoltaic module and the inverter.
  • the local manager is connected in communication with the main controller, so that the local manager can receive the operation permitting signal sent by the main controller; During the set time period, the local manager is activated, and the photovoltaic modules can output normal voltage to the inverter; and during the non-set time period (ie, all time periods except the "set time period"), the local management The device disconnects the PV module from the main line or reduces the output voltage of the PV module.
  • the main controller sets There is one and is arranged in the inverter as a component or a function of the inverter, and each local manager communicates with the main controller through a wireless network or PLC, so as to receive the signals sent by the main controller.
  • the number of local managers can also be set to be less than the number of photovoltaic modules.
  • one local manager can be used to control the on-off of multiple photovoltaic modules; the main controller can also be set separately in the Any position of the photovoltaic system, which is not limited here.
  • the photovoltaic assembly includes a photovoltaic laminate and a frame around the photovoltaic laminate, the local manager is arranged on the photovoltaic assembly, and is specifically located on the frame or the photovoltaic laminate; preferably , the local manager can be mechanically attached to the frame of the photovoltaic module, or can be adhered to the back plate of the photovoltaic laminate, which is not specifically limited here.
  • FIG 2 it is a relationship diagram between the allowable operation signal and the on-off state of photovoltaic modules.
  • the local manager starts between T1 and T2 after receiving an allowable operation signal from the main controller, so that the photovoltaic modules output normal voltage to the inverter, where T2 is later than T1.
  • the “set time period” mentioned above is the time between T1 and T2 after the local manager receives an operation permission signal sent by the master controller, and the time between T1 and T2 of the operation permission signal
  • the photovoltaic module is in the on state; when it is not between the time points T1 and T2, the photovoltaic module is in the off state.
  • T1 and T2 can be set by the local manager, or the main controller can transmit the settings to the local manager, which is not limited here; 2 the values of T1 and T2 can be fixed, It may not be fixed, nor is it limited here.
  • the allowable operation signal is not limited to one, and there may be more than one.
  • the local manager starts between T1 and T2 after receiving each allowable operation signal sent by the main controller, so that the photovoltaic modules output normal voltage to the inverter; and The local manager disconnects the photovoltaic modules from the main line or reduces the output voltage of the photovoltaic modules when not between the T1 and T2 time points of any allowable operation signal.
  • FIG. 3 it is the first on-off state waveform diagram of the photovoltaic module. It can be seen from this picture that the allowable running signal is continuously and periodically transmitted, and the transmission period of the allowable running signal is ⁇ T ⁇ (T2-T1), where T1 is 0 ⁇ 30S after the local manager receives the allowable running signal, T2 is 0.1 ⁇ 60S after the local manager receives the allowable operation signal, and T2 is later than T1.
  • T0 1 indicates the time point when the local manager receives the first allowable operation signal
  • T1 1 indicates the time point when the photovoltaic module starts to be turned on after the local manager receives the first allowable operation signal
  • T2 1 represents the time point when the PV module starts to turn off after the local manager receives the first operating permit signal, that is to say, the period from T0 1 to T1 1 is the response time of the PV module, and T1 1 to T2 1 This period of time is the turn-on time of the photovoltaic module
  • T0 2 indicates the time point when the local manager receives the second allowable operation signal
  • T1 2 indicates that the photovoltaic module after the local manager receives the second allowable operation signal
  • T2 2 represents the time point when the photovoltaic module starts to turn off after the local manager receives the second allowable operation signal; it can be seen that under the action of the first allowable operation signal, The photovoltaic module will continue to
  • the turn-on conditions of the photovoltaic modules in Fig. 3 are: between any time point T1 to T2 of the allowable operation signal, the photovoltaic module is in a conducting state, and when the transmission period of the allowable operation signal ⁇ T ⁇ (T2- At T1), the photovoltaic module can be continuously turned on; the turn-off condition of the photovoltaic module is: when the photovoltaic module is not between the T1 and T2 time points of any allowable operation signal, the photovoltaic module is in the off state.
  • FIG. 4 it is a waveform diagram of the second on-off state of the photovoltaic module. It can be seen from this picture that the operating signal is allowed to be continuously and periodically transmitted, but the photovoltaic modules cannot maintain a continuous conduction state. This is because: when the operating signal is allowed to be interrupted within a transmission period, the local manager responds immediately and the photovoltaic The component is turned off immediately (that is, the output voltage drops to zero), and the transmission period of the allowable operation signal at this time is ⁇ T>(T2-T1), where T1 is 0 ⁇ 30S after the local manager receives the allowable operation signal, and T2 is 0.1 ⁇ 60S after the local manager receives the allowable operation signal, T2 is later than T1.
  • the turn-on condition of the photovoltaic module in Fig. 4 is: between any time point T1 to T2 of the allowable operation signal, the photovoltaic assembly is in the conducting state, and when the transmission period of the allowable operation signal ⁇ T>(T2- At T1), after the time T2 is exceeded in one transmission cycle, the photovoltaic module enters the shutdown state; that is, the shutdown condition of the photovoltaic module is: when the photovoltaic module is not between the T1 and T2 time points of any allowable operation signal, the photovoltaic module is in the shutdown state. state.
  • the photovoltaic system of the present invention does not need to judge whether the allowable operation signal skips some pulses, but directly according to the presence or absence of the allowable operation signal and the pre-set rules (such as set A fixed period of time) to turn on or off the photovoltaic module, which reduces the judgment process and enhances reliability and safety.
  • the pre-set rules such as set A fixed period of time
  • the operating method of the photovoltaic system of the present invention mainly includes the following steps:
  • the local manager When the local manager receives the allowable operation signal sent by the main controller, within the set time period, the local manager starts, the photovoltaic modules are connected to the main line and output normal voltage to the inverter; while in the non-set time period Inside, the local manager disconnects the PV modules from the main line or reduces the output voltage of the PV modules.
  • set time period is specifically: between T1 and T2 after the local manager receives any allowable operation signal sent by the main controller; “non-set time period” is specifically: not in any allowable operation Between the T1 and T2 time points of the signal, where T2 is later than T1.
  • the values of T1 and T2 can be set by the local manager, or the settings can be transmitted by the main controller to the local manager; the values of T1 and T2 can be fixed or not fixed.
  • the photovoltaic system of the present invention does not need to judge whether the allowable operation signal skips some pulses during operation, but directly conducts conduction according to the presence or absence of the allowable operation signal and the preset rules Or turn off photovoltaic modules, reducing the judgment process and enhancing reliability and safety.
  • the local manager includes a signal receiving end connected to the main controller and a switch connected to the signal receiving end, and the signal receiving end is used to receive the permission sent by the main controller. Operation signal, and control the switch to close or open between T1 and T2 after receiving the allowable operation signal, so that the photovoltaic module is connected to the main line and outputs the normal voltage to the inverter, and in other time periods (that is, non-set set time period), then control the switch to open or close, so that the photovoltaic module is disconnected from the main line or the output voltage of the photovoltaic module is reduced.
  • the switch and the photovoltaic module can be connected in series or in parallel.
  • the switch is connected in series with the PV module, if the signal receiving end controls the switch to be closed, the PV module can be connected to the main line and output normal voltage to the inverter. If the signal receiving end controls the switch to be turned on, the PV module and the main Line disconnected.
  • the switch When the switch is connected in parallel with the PV module, if the signal receiving end controls the switch to open, the PV module can output normal voltage to the inverter at this time; if the signal receiving end controls the switch to be closed, the PV module outputs low voltage to the inverter at this time ,
  • the "low voltage” here refers to the safety voltage of the human body, and the specific value is not limited, as long as it can ensure that emergency responders are not shocked by high voltage when dealing with emergency abnormal events.
  • the switch in the above-mentioned embodiment can also be replaced with a voltage regulating device.
  • the signal receiving end is used to receive the operation permission signal sent by the main controller, and after receiving the operation permission signal
  • the operation of the voltage regulating device is controlled, so that the photovoltaic modules are connected to the main line and output normal voltage to the inverter, and the voltage regulating device is controlled during other time periods (ie, non-set time periods). operation to reduce the output voltage of the PV modules.
  • the voltage regulating device is a DC/DC power converter.
  • the photovoltaic modules within the set time period, the photovoltaic modules are connected to the main line, the photovoltaic modules can output normal voltage to the inverter, and the entire photovoltaic system works normally; during the non-set time period, the voltage regulating device can switch the photovoltaic modules from the photovoltaic module to the inverter. If the main line is disconnected, the PV module can also be kept connected to the main line, but at this time, the voltage regulating device needs to adjust the output voltage of the PV module to reduce the output voltage of the PV module, so as to ensure that emergency responders are dealing with emergency abnormal events. not be shocked by high voltage.
  • the local manager can control the photovoltaic modules to output normal voltage to the inverter within the set time period after the main controller sends the allowable operation signal, and in the non-set time period, The local manager disconnects the photovoltaic modules from the main line or reduces the output voltage of the photovoltaic modules, so that the photovoltaic system of the present invention can reduce the maximum output voltage of the photovoltaic system to human safety when the construction personnel deal with emergency abnormal events. Voltage to ensure that construction workers are not shocked by high voltage.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

La présente invention concerne un système photovoltaïque, un module photovoltaïque, un gestionnaire local et un procédé d'exploitation de système photovoltaïque. Le système photovoltaïque comprend un module photovoltaïque, un gestionnaire local, un dispositif de commande principal et un onduleur. L'onduleur est connecté électriquement au module photovoltaïque au moyen d'une ligne principale. Une extrémité du gestionnaire local est connectée au module photovoltaïque et l'autre extrémité du gestionnaire local est connectée à la ligne principale. Le gestionnaire local est connecté en communication au dispositif de commande principal, de telle sorte que le gestionnaire local est démarré dans une période programmée après réception d'un signal d'exploitation admissible provenant du dispositif de commande principal et le module photovoltaïque fournit une tension normale à l'onduleur,= et, dans une période non programmée, le gestionnaire local déconnecte le module photovoltaïque de la ligne principale ou réduit la tension de sortie du module photovoltaïque. Le système photovoltaïque de la présente invention n'a pas besoin de déterminer si le signal de fonctionnement admissible saute certaines impulsions mais met directement sous tension le module photovoltaïque en fonction de la présence et de l'absence du signal de fonctionnement admissible et d'une période pré-programmée, de façon à réduire le processus d'évaluation, d'où une amélioration de la fiabilité et de la sécurité.
PCT/CN2022/074459 2021-03-18 2022-01-28 Système photovoltaïque, ensemble photovoltaïque, gestionnaire local et procédé d'exploitation de système photovoltaïque WO2022193854A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202110289325 2021-03-18
CN202110289325.6 2021-03-18
CN202111674690.5 2021-12-31
CN202111674690.5A CN115117846A (zh) 2021-03-18 2021-12-31 光伏系统、光伏组件、本地管理器及光伏系统运行方法

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110088741A1 (en) * 2009-10-19 2011-04-21 Randy Richard Dunton Solar Photovoltaic Module Safety Shutdown System
US20160036235A1 (en) * 2014-07-30 2016-02-04 Robert Getsla Safety Shutdown System for Photovoltaic Power Generators
CN111478290A (zh) * 2020-04-16 2020-07-31 阳光电源股份有限公司 一种快速关断方法、光伏组件关断器和光伏系统
CN111934352A (zh) * 2020-10-09 2020-11-13 浙江英达威芯电子有限公司 光伏系统及其关断器件的控制方法、开关控制装置
CN214799407U (zh) * 2021-03-18 2021-11-19 苏州阿特斯阳光电力科技有限公司 光伏系统、光伏组件及本地管理器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110088741A1 (en) * 2009-10-19 2011-04-21 Randy Richard Dunton Solar Photovoltaic Module Safety Shutdown System
US20160036235A1 (en) * 2014-07-30 2016-02-04 Robert Getsla Safety Shutdown System for Photovoltaic Power Generators
CN111478290A (zh) * 2020-04-16 2020-07-31 阳光电源股份有限公司 一种快速关断方法、光伏组件关断器和光伏系统
CN111934352A (zh) * 2020-10-09 2020-11-13 浙江英达威芯电子有限公司 光伏系统及其关断器件的控制方法、开关控制装置
CN214799407U (zh) * 2021-03-18 2021-11-19 苏州阿特斯阳光电力科技有限公司 光伏系统、光伏组件及本地管理器

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