EP3284164A1 - Procédé de traitement des défauts et redondance partielle dans des onduleurs en parallèle au moyen de commutateurs d'entrée - Google Patents

Procédé de traitement des défauts et redondance partielle dans des onduleurs en parallèle au moyen de commutateurs d'entrée

Info

Publication number
EP3284164A1
EP3284164A1 EP15716040.9A EP15716040A EP3284164A1 EP 3284164 A1 EP3284164 A1 EP 3284164A1 EP 15716040 A EP15716040 A EP 15716040A EP 3284164 A1 EP3284164 A1 EP 3284164A1
Authority
EP
European Patent Office
Prior art keywords
inverter
input
direct current
inverter device
generators
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Withdrawn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
EP15716040.9A
Other languages
German (de)
English (en)
Inventor
Lorenz Feddersen
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.)
Wind & Sun Technologies SL
Original Assignee
Wind & Sun Technologies SL
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 Wind & Sun Technologies SL filed Critical Wind & Sun Technologies SL
Publication of EP3284164A1 publication Critical patent/EP3284164A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/493—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
    • 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
    • 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
    • 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
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
    • 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 present invention relates to a method of error handling an inverter apparatus for inverting direct current from direct current generators into alternating current, the inverter apparatus comprising a plurality of parallel DC legs, each direct current branch having an inverter and a DC input for connection to one of the DC generators.
  • the invention further relates to a method for error treatment of a converter device for converting alternating current from alternating current generators, as well as a set up for carrying out the respective method changeover or converter device.
  • Inverter devices for photovoltaic systems generally have a plurality of inverters connected in parallel, wherein a corresponding inverter is provided for each DC generator (solar cell array).
  • a corresponding inverter is provided for each DC generator (solar cell array).
  • the DC branch corresponding to the faulty inverter is automatically disconnected or disconnected.
  • the corresponding DC generator can not be used, so that the performance of the photovoltaic system is reduced.
  • DC generator is switched from an active, faultless inverter to another active, faultless inverter.
  • the object of the invention is to provide methods in which the negative effects of an error occurring in an inverter or inverter are reduced.
  • the invention solves this problem with the features of the independent claims.
  • the DC input of the faulty inverter is connected to the DC input of a faultless inverter.
  • the functioning inverter can at least partially take over the performance of the defective inverter until the service technician arrives.
  • the current generated by the DC generator assigned to the defective inverter can therefore also be used at least partially during the failure of an inverter.
  • the fault detected by the inverter device is communicated to the remote monitoring center via a remote monitoring link, and the DC input connection is made by a control signal transmitted via the remote monitoring link from the remote control center.
  • connection of the DC inputs can be reopened exclusively by intervention of a service technician at the location of the inverter device. This prevents inadvertent opening of the connection before a field service technician has ensured that the failed inverter has been replaced or repaired.
  • the invention includes hybrid systems with different types of direct current generators, in particular solar power generators and energy storage devices, for example batteries.
  • direct current generators in particular solar power generators and energy storage devices, for example batteries.
  • the inverters are preferably operated for charging the energy store or in the reverse direction as a rectifier.
  • the inverters are preferably operated to deliver stored in the energy storage or the energy to an AC network.
  • a variant of the invention relates to a method for error handling a converter device for converting alternating current from alternators, the converter device comprising a plurality of parallel alternating current branches, each alternating current branch having an inverter and an alternating current input for connection to one of the alternating current generators.
  • the invention is characterized in that as a result of a detected by the power converter device error in one of the inverter, the AC input of the faulty inverter is connected to the AC input of a faultless inverter.
  • FIG. 5 is a schematic circuit diagram for a Windenergy- anläge in an embodiment of the invention.
  • the photovoltaic system 10 comprises a plurality of direct current generators 13, 14, in particular solar power generators, and an inverter device 15 for converting the direct current generated by the direct current generators 13, 14 into alternating current.
  • Each solar power generator 13, 14 comprises at least one solar cell panel or solar panel. In general, each solar power generator 13, 14 contains a plurality of solar cells or photovoltaic cells.
  • the inverter device 15 comprises as a central component a plurality of inverters 11, 12. Each inverter 11, 12 is connected by means of lines which form respective DC branches 16, 17 with a corresponding one
  • DC input 18, 19 connected.
  • a corresponding DC generator 13, 14 can be connected. Mach the direction of change by the inverter 11, 12, the AC power generated via one or more AC outputs 20, for example, to an AC power AC, power consumers and / or power storage.
  • Inverter 11, 12 is each a controllable switch 21, 22 and 23, 24 arranged to separate the inverters 11, 12, for example, in the event of a defect individually from the inverter device 15.
  • the two DC branches 16, 17 and the two DC inputs 18, 19 are connected to each other by means of a controllable switch 25 via a bridge 47.
  • the switch 25 is bipolar, i. it switches both the positive pole of the DC branches 16, 17 by means of a switching element 27 and the negative pole by means of a switching element 26, wherein the
  • Switching elements 26, 27 are preferably coupled.
  • the switches 21 to 25 and the inverters 11, 12 are controllable by means of an electronic control device 28.
  • the electronic control device 28 is for example a signal or microprocessor and may be arranged in the inverter device 15 or generally at a suitable location in the photovoltaic system 10.
  • the electronic control device 28 is also arranged to measure or detect an error in one of the inverters 11, 12.
  • the electronic control device 28 is connected via a remote monitoring connection 29 to a remote from the photovoltaic system 10 remote maintenance center 30.
  • the remote maintenance center 30 can be operated, for example, by the provider of the inverter device 15.
  • the remote maintenance center 30 is used in particular for monitoring a plurality of inverter devices independent of each other and spatially remote photovoltaic systems by service technicians.
  • the remote monitoring connection 29 can be implemented by means of a cable connection or completely or partially wirelessly by radio link.
  • the operation of the inverter circuit 15 is as follows. During normal operation of the system, the switches 21 to 24 are closed and the switch 25 is open.
  • the direct current generated by the direct current generator 13 is fed via the DC input 18 and the DC branch 16 to the inverter 11, where it is directed in alternating current and passed to the AC output 20.
  • the direct current generated by the direct current generator 14 is fed via the DC input 19 and the DC branch 17 to the inverter 12, where it is directed in alternating current and passed to the AC output 20.
  • control device 28 When the control device 28 detects a fault or defect in one of the inverters 11, 12, the following steps are performed. It is assumed here without limitation that an error condition is detected at the inverter 12. First, the control device 28 controls the switches 23 and 24 upstream and downstream of the corresponding inverter 12 to open them and thus disconnect the corresponding inverter 12 from the inverter device 15 on both sides, that is, on the DC and AC sides. Furthermore, the control device 28 sends an error signal to the remote monitoring center 30. At the remote monitoring center 30, after receiving the error signal and checking the situation in the inverter device 15, qualified personnel can trigger the transmission of a switching signal from the remote monitoring center 30 to the inverter device 15.
  • the control device 28 Upon receipt of the switching signal from the remote control center 30, the control device 28, preferably without external intervention, controls the switch 25 to close it and thus the DC branches 16 and 17 and the DC inputs 18 and 19, respectively to connect with each other.
  • power generated by both direct current generators 13, 14 can be re-directed by the intact inverter 11, ie, the functioning inverter 11 can take over at least part of the power of the defective inverter 12 until a service technician arrives at the location of the inverter device 15.
  • the switch 25 After the service technician repairs or exchanges the defective inverter 12, the switch 25 is opened by the service technician, and then the switches 23, 24 are closed to put the inverter 12 back into operation.
  • the opening or disconnection of the switch 25 is preferably carried out by a service technician on site for safety reasons. Alternatively, it can also be triggered via the remote monitoring connection 29.
  • FIGS. 2 and 3 Advantageous embodiments for the general case of more than two inverters are shown schematically in FIGS. 2 and 3 using the example of four inverters 11, 12, 31, 32.
  • the switches 21 to 24 for disconnecting the inverters, the control device 28 and the remote control center 30 have been omitted for the sake of clarity.
  • the number of required switches 25, 35 is here half as large as the number of inverters (at an even number).
  • each DC current path 16, 17, 36, 37 or each DC input 18, 19, 38, 39, each with two different DC current paths is respectively connected via a switch 25, 35, 40, 41 and corresponding bridges 47, 51 , 52, 53 connected, advantageously in the form of a ring circuit, as shown in Figure 3.
  • the number of switches required 25, 35, 40, 41 corresponds here to the number of inverters 11, 12, 31, 32. This is given a manageable higher effort than in Figure 2, a much higher reliability, as well as the failure of any two inverters is manageable, so that all DC generators 13, 14, 33, 34 can be used until the service technician arrives on site.
  • the switches 40 and 41 in FIG. 3 may be closed so that current generated by the DC generator 13 can be redirected in the inverter 32 and current generated by the DC generator 14 in the inverter 31.
  • FIG. 4 shows, as a further embodiment, a so-called hybrid system 10, in which, in addition to a first type of direct current generators 13, 14, here for example solar power generators, a further type of direct current generators 42, 43 is provided.
  • This may be, for example, energy storage, in particular batteries.
  • Such a hybrid system 10 is as follows. At times of high solar power, i. at high solar radiation or brightness, such as at noon, the solar power generators 13, 14 more power than the AC power AC can accommodate. In this case, the system 10 is operated, in particular by suitable control of the inverters 31, 32, so that the energy stores 42, 43 are charged. The current flow is then directed from the AC voltage side 20 to the batteries 42, 43, the batteries 42, 43 associated power converters 31, 32 thus operate as a rectifier; the current direction is thus reversed to the current direction of the solar power generator 13, 14.
  • the solar power generators 13, 14 no or little power from.
  • the system 10 in particular by suitable control of the inverters 31, 32, operated so that the energy storage 42, 43 feed into the AC mains AC.
  • the current flow is then directed from the batteries 42, 43 to the AC voltage side 20, the power converters 31, 32 assigned to the batteries 42, 43 thus operate as an inverter. ter;
  • the current direction is thus the same as the current direction of the solar power generators 13, 14.
  • the embodiments according to FIGS. 1 to 4 are easily transferable to alternating current generators 63, 64 instead of direct current generators 13, 14, 33, 34, 42, 43.
  • the power conversion device 45 includes a plurality of parallel AC branches 56, 57, each AC leg 56, 57 having an inverter 61, 62 and an AC input 48, 49 for connection to one of the alternators 63, 64.
  • the alternators 63, 64 may be, for example, different windings of the generator of a wind turbine 50.
  • the control device 28 is arranged to close the switch 25 to connect the AC input 48, 49 of the faulty inverter 62 to the AC input 48 of a faultless inverter 61.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

L'invention concerne un procédé de traitement des défauts dans un système onduleur (15) servant à transformer le courant continu issu de générateurs de courant continu (13, 14) en courant alternatif, le système onduleur (15) comprenant une pluralité de branches CC en parallèle (16, 17), chaque branche CC (16, 17) comportant un onduleur (11, 12) et une entrée CC (18, 19) destinée à être reliée à un des générateurs de courant continu (13, 14). Lorsqu'un défaut est constaté dans l'un des onduleurs (11, 12) par le système onduleur (15), l'entrée CC (18, 19) de l'onduleur défectueux est reliée à l'entrée CC d'un onduleur sans défaut.
EP15716040.9A 2015-04-13 2015-04-13 Procédé de traitement des défauts et redondance partielle dans des onduleurs en parallèle au moyen de commutateurs d'entrée Withdrawn EP3284164A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/057958 WO2016165730A1 (fr) 2015-04-13 2015-04-13 Procédé de traitement des défauts et redondance partielle dans des onduleurs en parallèle au moyen de commutateurs d'entrée

Publications (1)

Publication Number Publication Date
EP3284164A1 true EP3284164A1 (fr) 2018-02-21

Family

ID=52829096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15716040.9A Withdrawn EP3284164A1 (fr) 2015-04-13 2015-04-13 Procédé de traitement des défauts et redondance partielle dans des onduleurs en parallèle au moyen de commutateurs d'entrée

Country Status (3)

Country Link
US (1) US20180262121A1 (fr)
EP (1) EP3284164A1 (fr)
WO (1) WO2016165730A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3284151B1 (fr) * 2015-04-16 2022-06-29 Vestas Wind Systems A/S System de convertisseurs destine aux eoliennes tolérant aux pannes

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4232516C2 (de) * 1992-09-22 2001-09-27 Hans Peter Beck Autonomes modulares Energieversorgungssystem für Inselnetze
DE20002237U1 (de) * 1999-09-30 2000-07-13 Sma Regelsysteme Gmbh Modularer Batteriestromrichter für die Stromversorgung in Inselnetzen
DE10040273A1 (de) * 2000-08-14 2002-02-28 Aloys Wobben Windenergieanlage
JP3656531B2 (ja) * 2000-08-31 2005-06-08 松下電工株式会社 太陽光発電システム
FR2961035B1 (fr) * 2010-06-04 2013-09-20 Aeg Power Solutions Bv Dispositif de connexion matricielle pour panneaux photovoltaiques et/ou eoliennes
GB2485423B (en) * 2011-01-18 2014-06-04 Enecsys Ltd Solar photovoltaic systems
US9608438B2 (en) * 2012-07-17 2017-03-28 Electronics And Telecommunications Research Institute Inverter system for photovoltaic power generation

Also Published As

Publication number Publication date
WO2016165730A1 (fr) 2016-10-20
US20180262121A1 (en) 2018-09-13

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