EP2054944A2 - Installation pour la production d'énergie solaire - Google Patents

Installation pour la production d'énergie solaire

Info

Publication number
EP2054944A2
EP2054944A2 EP07856518A EP07856518A EP2054944A2 EP 2054944 A2 EP2054944 A2 EP 2054944A2 EP 07856518 A EP07856518 A EP 07856518A EP 07856518 A EP07856518 A EP 07856518A EP 2054944 A2 EP2054944 A2 EP 2054944A2
Authority
EP
European Patent Office
Prior art keywords
module
enable signal
modules
switching element
solar energy
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP07856518A
Other languages
German (de)
English (en)
Inventor
Hendrik Kolm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SolarWorld Innovations GmbH
Original Assignee
SP Solarprojekt GmbH
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
Priority claimed from DE102006060815A external-priority patent/DE102006060815B4/de
Application filed by SP Solarprojekt GmbH filed Critical SP Solarprojekt GmbH
Publication of EP2054944A2 publication Critical patent/EP2054944A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/02016—Circuit arrangements of general character for the devices
    • H01L31/02019—Circuit arrangements of general character for the devices for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/02021—Circuit arrangements of general character for the devices for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • 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
    • H02J3/381—Dispersed generators
    • 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
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • 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
    • 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 a solar power plant, which is composed of one or more parallel strings of photovoltaic (PV) modules and feeds via inverters in a low-voltage grid.
  • PV photovoltaic
  • PV modules photovoltaic power generators
  • FIG. 1.1 to 1.4 show such generator circuits, wherein a single PV module has the short-circuit current Dc and the open-circuit voltage Uoc.
  • the single PV module has an open circuit voltage of 40VDC and a short circuit current of 5A.
  • Fig. 1.1 shows a single PV module 1.
  • 20 PV modules 1 to 20 are connected in series to form a string (string), with the individual voltages of the PV modules adding up to 800 VDC; the short circuit current of the string is 5A as that of the single module.
  • Fig. 1.4 Frequent shading in grid-connected solar power systems is shown in Fig. 1.4.
  • the individual PV modules are first connected in series to strings 1-20, "381-400, then the strings 1-20 ... 381-400 connected in parallel.
  • the total voltage is then 800 VDC, the total current 100A.
  • PV modules for solar generators generate these voltages as soon as light hits them.
  • downstream electrical equipment such as lines, charge controllers, inverters for grid or island operation are required. These are under the action of light on the solar generator at least partially under tension, even if no operation is desired, or the operation is not possible due to a fault.
  • Fig. 2 shows a frequently implemented arrangement with a generator circuit as shown in Fig. 1.4 and downstream central inverter ZR for grid parallel operation for the purpose of feeding into a supply network N.
  • a central inverter it is also possible to provide so-called string inverter to each string at a associated inverter to connect.
  • the inverter fails ZR, for example, due to a power failure, the operation still remains the solar generator and the downstream line system to the DC input of the inverter ZR under tension as long as the solar generator is exposed to light (until sunset).
  • additional DC cutouts FS may be placed in the DC path at any point accessible to manually de-energize subsequent resources, these circuit breakers FS can not prevent the PV modules from continuing to supply voltage.
  • the object of the invention is to provide measures to switch off each individual PV module automatically, so that the PV modules are current and voltage-free.
  • the invention is based on the consideration of switching the individual PV modules dead (as long as possible by short-circuiting or by disconnecting the output terminals) as long as there is no release for the generator operation from a downstream equipment.
  • the release can preferably by a on the DC lines auftnodulators control signal for each terminal switch done.
  • Fig. 4 is a circuit diagram of a first embodiment of a solar generator whose PV modules can be short-circuited via a remote-controlled switch;
  • Fig. 5.1 shows the switching state of the solar generator according to Fig. 4 in the absence of a release signal and thus de-energized PV modules
  • Fig. 5.2 shows the switching state of the solar generator according to Fig. 4 with the enable signal available and thus active PV modules
  • Fig. 6 is a circuit diagram of a second embodiment of a solar generator whose PV modules via a remote controllable switch can be switched on the output side high impedance
  • Fig. 7.1 shows the switching state of the solar generator according to Fig. 6 in the absence of a release signal and thus de-energized PV modules
  • Fig. 7.2 shows the switching state of the solar generator according to Fig. 6 with the enable signal available and thus active PV modules.
  • the first embodiment of a solar generator shown in Fig. 4 with the features of the invention has over the prior art according to Fig. 2, two additional components, namely
  • a release block C, D (modulator) in or on the downstream equipment N which transmits an enable signal for the module switch via the DC voltage line
  • Each module switch A is permanently closed without enable signal FG, whereby the PV module is operated in a short circuit and at the terminals of the PV module, the output voltage ⁇ IV is applied. If the enable signal FG is modulated onto the connection line to the module or to the modules by means of the enable module C, D, the demodulator B in the PV module switches the module switch A into the high-resistance state, so that the PV module has its operating voltage at the output terminals leads.
  • Fig. 5.1 shows the status "Module de-energized”
  • Fig. 5.2 shows the status "Module active”.
  • the invention provides for arranging in each PV module, preferably in the junction box, a switch (A) which short-circuits the PV module so that the clamping voltage at the DC terminals of the PV module becomes almost zero when not enabled from the downstream resources.
  • a switch for the PV module, this short circuit is a control mode.
  • the switch A can eg as a semiconductor gate element (Logic Level Power Mosfet) or as a bipolar transistor with insulated gate bipolar transistor ("Insulated Gate Bipolar Transistor").
  • Each switch A is driven by an associated demodulation circuit B, which when released by the downstream equipment, the switch A in the high-impedance state, so that the PV module can supply voltage.
  • the associated demodulator B is adjusted to the carrier frequency of the enable block C, D and provides for the control of the module switch A.
  • the enable module C, D preferably consists of a frequency-stable clock generator C, which is formed, for example quartz-stable, with downstream power amplifier with push-pull output. Via a balun transformer D for impedance conversion and galvanic isolation, the carrier signal is coupled as a pilot tone to the DC connection line to the PV modules and their demodulators B. The carrier signal can be switched on or off via a logic input of the clock generator.
  • a release block C, D is assigned to each string.
  • a release block C, D is sufficient for the entire generator, unless several subgenerators should be separately switchable (eg for fault detection).
  • the PV modules are not in the absence of the enable signal FG - as in the first Form of execution according to Fig. 4 - short-circuited in itself, but switched on the output side by the module switch A high impedance.
  • the module switches A are arranged in series with the output terminals of the PV modules 1 to 400.
  • Each module switch A is constantly open without release signal FG, whereby the terminal voltage of the PV modules 1 to 400 with open module switches A is zero volts.
  • This de-energized state of PV modules 1 to 400 is illustrated in Fig. 7.1.
  • the module switches A switch on the voltage at the module terminals, whereby the PV modules 1 to 400 become active.
  • This active state of the PV modules 1 to 400 is illustrated in Fig. 7.2.
  • the advantage of the second embodiment of the solar generator according to the invention according to Figures 6, 7.1 and 7.2 is that the control energy for driving the module switch A can be obtained directly from the modulated control signal, which is favorable for the testing of the PV modules after the production.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Photovoltaic Devices (AREA)

Abstract

Des installations pour la production d'énergie solaire sont constituées d'une ou de plusieurs chaînes parallèles de modules photovoltaïques, et alimentent, via des convertisseurs, un réseau basse tension. L'invention est caractérisée en ce qu'à chaque module PV (1 à 400) est associé, à sa sortie, un élément de commutation (A) qui peut être commuté au moyen d'un signal de libération (FG), de telle manière qu'en cas d'absence de signal de libération (FG), le module PV associé soit mis hors tension, et soit activé en présence d'un signal de libération (FG).
EP07856518A 2006-12-21 2007-12-10 Installation pour la production d'énergie solaire Withdrawn EP2054944A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006060815A DE102006060815B4 (de) 2006-09-21 2006-12-21 Solarenergieerzeugungsanlage
PCT/EP2007/010745 WO2008077473A2 (fr) 2006-12-21 2007-12-10 Installation pour la production d'énergie solaire

Publications (1)

Publication Number Publication Date
EP2054944A2 true EP2054944A2 (fr) 2009-05-06

Family

ID=39562988

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07856518A Withdrawn EP2054944A2 (fr) 2006-12-21 2007-12-10 Installation pour la production d'énergie solaire

Country Status (2)

Country Link
EP (1) EP2054944A2 (fr)
WO (1) WO2008077473A2 (fr)

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US10931228B2 (en) 2010-11-09 2021-02-23 Solaredge Technologies Ftd. Arc detection and prevention in a power generation system
US10931119B2 (en) 2012-01-11 2021-02-23 Solaredge Technologies Ltd. Photovoltaic module
US10969412B2 (en) 2009-05-26 2021-04-06 Solaredge Technologies Ltd. Theft detection and prevention in a power generation system
US10992238B2 (en) 2012-01-30 2021-04-27 Solaredge Technologies Ltd. Maximizing power in a photovoltaic distributed power system
US11002774B2 (en) 2006-12-06 2021-05-11 Solaredge Technologies Ltd. Monitoring of distributed power harvesting systems using DC power sources
US11018623B2 (en) 2016-04-05 2021-05-25 Solaredge Technologies Ltd. Safety switch for photovoltaic systems
US11031861B2 (en) 2006-12-06 2021-06-08 Solaredge Technologies Ltd. System and method for protection during inverter shutdown in distributed power installations
US11063440B2 (en) 2006-12-06 2021-07-13 Solaredge Technologies Ltd. Method for distributed power harvesting using DC power sources
US11177663B2 (en) 2016-04-05 2021-11-16 Solaredge Technologies Ltd. Chain of power devices
US11183922B2 (en) 2006-12-06 2021-11-23 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11183968B2 (en) 2012-01-30 2021-11-23 Solaredge Technologies Ltd. Photovoltaic panel circuitry
US11205946B2 (en) 2011-01-12 2021-12-21 Solaredge Technologies Ltd. Serially connected inverters
US11296650B2 (en) 2006-12-06 2022-04-05 Solaredge Technologies Ltd. System and method for protection during inverter shutdown in distributed power installations
US11309832B2 (en) 2006-12-06 2022-04-19 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11424616B2 (en) 2008-05-05 2022-08-23 Solaredge Technologies Ltd. Direct current power combiner
US11476799B2 (en) 2006-12-06 2022-10-18 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11489330B2 (en) 2010-11-09 2022-11-01 Solaredge Technologies Ltd. Arc detection and prevention in a power generation system
US11569659B2 (en) 2006-12-06 2023-01-31 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11569660B2 (en) 2006-12-06 2023-01-31 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11579235B2 (en) 2006-12-06 2023-02-14 Solaredge Technologies Ltd. Safety mechanisms, wake up and shutdown methods in distributed power installations
US11594968B2 (en) 2007-08-06 2023-02-28 Solaredge Technologies Ltd. Digital average input current control in power converter
US11687112B2 (en) 2006-12-06 2023-06-27 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11728768B2 (en) 2006-12-06 2023-08-15 Solaredge Technologies Ltd. Pairing of components in a direct current distributed power generation system
US11735910B2 (en) 2006-12-06 2023-08-22 Solaredge Technologies Ltd. Distributed power system using direct current power sources
US11855231B2 (en) 2006-12-06 2023-12-26 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11929620B2 (en) 2012-01-30 2024-03-12 Solaredge Technologies Ltd. Maximizing power in a photovoltaic distributed power system

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US8049523B2 (en) 2007-12-05 2011-11-01 Solaredge Technologies Ltd. Current sensing on a MOSFET
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US10230310B2 (en) 2016-04-05 2019-03-12 Solaredge Technologies Ltd Safety switch for photovoltaic systems
EP2455977A1 (fr) * 2010-11-16 2012-05-23 Siemens Aktiengesellschaft Installation photovoltaïque
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US11687112B2 (en) 2006-12-06 2023-06-27 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11594880B2 (en) 2006-12-06 2023-02-28 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11728768B2 (en) 2006-12-06 2023-08-15 Solaredge Technologies Ltd. Pairing of components in a direct current distributed power generation system
US10673253B2 (en) 2006-12-06 2020-06-02 Solaredge Technologies Ltd. Battery power delivery module
US11682918B2 (en) 2006-12-06 2023-06-20 Solaredge Technologies Ltd. Battery power delivery module
US11658482B2 (en) 2006-12-06 2023-05-23 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11002774B2 (en) 2006-12-06 2021-05-11 Solaredge Technologies Ltd. Monitoring of distributed power harvesting systems using DC power sources
US11855231B2 (en) 2006-12-06 2023-12-26 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11031861B2 (en) 2006-12-06 2021-06-08 Solaredge Technologies Ltd. System and method for protection during inverter shutdown in distributed power installations
US11043820B2 (en) 2006-12-06 2021-06-22 Solaredge Technologies Ltd. Battery power delivery module
US11063440B2 (en) 2006-12-06 2021-07-13 Solaredge Technologies Ltd. Method for distributed power harvesting using DC power sources
US11073543B2 (en) 2006-12-06 2021-07-27 Solaredge Technologies Ltd. Monitoring of distributed power harvesting systems using DC power sources
US11962243B2 (en) 2006-12-06 2024-04-16 Solaredge Technologies Ltd. Method for distributed power harvesting using DC power sources
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US11296650B2 (en) 2006-12-06 2022-04-05 Solaredge Technologies Ltd. System and method for protection during inverter shutdown in distributed power installations
US11309832B2 (en) 2006-12-06 2022-04-19 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
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US11476799B2 (en) 2006-12-06 2022-10-18 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11569659B2 (en) 2006-12-06 2023-01-31 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11579235B2 (en) 2006-12-06 2023-02-14 Solaredge Technologies Ltd. Safety mechanisms, wake up and shutdown methods in distributed power installations
US11598652B2 (en) 2006-12-06 2023-03-07 Solaredge Technologies Ltd. Monitoring of distributed power harvesting systems using DC power sources
US11575261B2 (en) 2006-12-06 2023-02-07 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11575260B2 (en) 2006-12-06 2023-02-07 Solaredge Technologies Ltd. Distributed power harvesting systems using DC power sources
US11594968B2 (en) 2007-08-06 2023-02-28 Solaredge Technologies Ltd. Digital average input current control in power converter
US11424616B2 (en) 2008-05-05 2022-08-23 Solaredge Technologies Ltd. Direct current power combiner
US11867729B2 (en) 2009-05-26 2024-01-09 Solaredge Technologies Ltd. Theft detection and prevention in a power generation system
US10969412B2 (en) 2009-05-26 2021-04-06 Solaredge Technologies Ltd. Theft detection and prevention in a power generation system
US11349432B2 (en) 2010-11-09 2022-05-31 Solaredge Technologies Ltd. Arc detection and prevention in a power generation system
US11489330B2 (en) 2010-11-09 2022-11-01 Solaredge Technologies Ltd. Arc detection and prevention in a power generation system
US12003215B2 (en) 2010-11-09 2024-06-04 Solaredge Technologies Ltd. Arc detection and prevention in a power generation system
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US11205946B2 (en) 2011-01-12 2021-12-21 Solaredge Technologies Ltd. Serially connected inverters
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