DE102009035399A1 - Circuit arrangement for current steering - Google Patents

Circuit arrangement for current steering

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Publication number
DE102009035399A1
DE102009035399A1 DE102009035399A DE102009035399A DE102009035399A1 DE 102009035399 A1 DE102009035399 A1 DE 102009035399A1 DE 102009035399 A DE102009035399 A DE 102009035399A DE 102009035399 A DE102009035399 A DE 102009035399A DE 102009035399 A1 DE102009035399 A1 DE 102009035399A1
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DE
Germany
Prior art keywords
phase
v4
v1
gn
ac
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Withdrawn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
DE102009035399A
Other languages
German (de)
Inventor
Martin Loeffler
Original Assignee
Löffler, Martin
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 Löffler, Martin filed Critical Löffler, Martin
Priority to DE102009035399A priority Critical patent/DE102009035399A1/en
Publication of DE102009035399A1 publication Critical patent/DE102009035399A1/en
Application status is Withdrawn legal-status Critical

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • H02J3/383Solar energy, e.g. photovoltaic energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • H02J3/386Wind energy
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion electric or electronic aspects
    • Y02E10/563Power conversion electric or electronic aspects for grid-connected applications
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/76Power conversion electric or electronic aspects
    • Y02E10/763Power conversion electric or electronic aspects for grid-connected applications
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of electrical power generation, transmission or distribution, i.e. smart grids as climate change mitigation technology in the energy generation sector
    • Y02E40/72Systems characterised by the monitoring, control or operation of energy generation units, e.g. distributed generation [DER] or load-side generation
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/10Systems characterised by the monitored, controlled or operated power network elements or equipment
    • Y04S10/12Systems characterised by the monitored, controlled or operated power network elements or equipment the elements or equipment being or involving energy generation units, including distributed generation [DER] or load-side generation
    • Y04S10/123Systems characterised by the monitored, controlled or operated power network elements or equipment the elements or equipment being or involving energy generation units, including distributed generation [DER] or load-side generation the energy generation units being or involving renewable energy sources

Abstract

A circuit arrangement for current control between at least one consumer-side power source (G1), an electrical supply network (11) and electrical loads (V1 to V4), all phases (L1, L2, L3) of the current sources (G1 to Gn) via controllable switch (S7 to S15) are connected to the electrical loads (V1 to V4) and via controllable switches (S1, S2, S3) and an electricity meter (Z1) to the supply network (11) and wherein the electrical loads (V1 to V4) via controllable switch (S4, S5, S6) and an electricity meter (Z2) to the supply network (11) are connected.

Description

  • In Germany is so far possible due to legal requirements, own Generate electricity, for example via a photovoltaic system, and the electricity generated in the public Supply network. The electricity fed in is provided by the utility company hardened and tempered. The electricity that the customer of the utility company for his electric equipment needed he still refers to the utility company.
  • Besides, they are known as isolated solutions, where the consumer is complete from public Network is disconnected and its needed power exclusively self generated. This happens a photovoltaic system, so the electricity generated by this, so far he is not consumed directly, cached in a battery.
  • by virtue of legal changes it is now being promoted by lawmakers, if customers by public Utilities that generate electricity themselves, too consume yourself. The electricity that the customer does not use can be he continues to feed into the grid. Should the self-produced Electricity is insufficient, so the customer can still electricity from the public Obtain supply network.
  • Of the Invention is based on the object, a circuit arrangement for Power steering to meet the new legislation wears and both self-consumption of the electricity customer itself generated Electricity as well as a feed into the public supply network allowed, with all Phases of self-generated electricity to the electrical consumers can be switched.
  • The Task is solved with a circuit arrangement for power steering between at least a consumer-side three-phase and / or alternating current source, in particular a photovoltaic system with inverter, an electric Supply network and electrical three-phase and / or AC consumers, which is characterized in that all phases of the at least one Three-phase and / or AC power source via controllable Switch with three-phase and / or AC consumers and via controllable switches and an electricity meter for every Phase are connected to the supply network and that the three-phase and / or AC consumers via controllable switches and a three-phase meter or an AC meter for every Phase are connected to the supply network.
  • The Connection between the power sources of the customer and its electrical Allows consumers a direct self-consumption of self-generated electricity The customers. If the customer has no electrical equipment in operation, so can the customer Power sources over the controllable switches are connected to the supply network and feed their electricity there. Record the planned electricity meters for each phase the amount of electricity fed into the grid.
  • Deliver the own power sources at the customer, however, little or no Electricity for his electrical appliances, so can these devices over the designated Switch can be connected to the utility network and from it their Electricity partially or completely Respectively. This electricity supply from the supply network is again recorded by electricity meters, so that a proper billing by the utilities carried out with the customer can be.
  • There the new legal regulations in Germany even a remuneration of the self-produced and self-consumed electricity for the end customer It is also intended appropriate if between the at least one three-phase and / or alternating current source and the three-phase and / or AC loads a three-phase meter or an AC meter for every Phase is arranged. It leaves thus also the self-consumed portion of self-produced Capture electricity exactly and settle it with utility.
  • Around the self-generated electricity of all phases the house connection and thus all electrical Available to consumers to be able to Each phase of the at least one three-phase and / or alternating current source can be controlled via a controllable Switch with each phase of the three-phase and / or AC consumers be connected.
  • Further it is advantageous if the circuit arrangement is a control device that with with for each phase of the at least one three-phase and / or alternating current source and each phase of the three-phase and / or AC consumers provided current measuring devices and all controllable Switches is connected. This control device can be fully automatic or also freely programmable make the desired current steering. About the Current measuring equipment can be used at any time by or Electricity generated by power sources and consumed by consumers Current can be measured accurately and accordingly the switches are operated.
  • Thus, with the control device between the at least one three-phase and / or AC power source and the three-phase and / or Switches may be partially or all jointly closable when AC and / or AC loads consume power and the at least one three-phase and / or AC power source provides power. For this purpose, the current intensity supplied by the current sources is compared with the current intensity of the consumers in the control device. According to the comparison result, one or more phases of the power consumers are connected by closing the corresponding switches with one or more phases of the at least one power source. At the same time can be conveniently separated by opening the associated switch a phase of the power circuit, which is connected to the customer's power sources from the public network.
  • Further can with the control device which between the at least one three-phase and / or alternating current source and the supply network arranged Switches are closed when the at least one three-phase and / or AC power source provides more power than the AC and / or AC consumers need. Also this closing the switch to the utility grid can only be common for individual switches or for all respectively.
  • Besides that is it is possible with the control device which between the supply network and the three-phase and / or AC consumers arranged switches for one or to close several phases, when the three-phase and / or AC consumers more power need, as the at least one three-phase and / or alternating current source supplies.
  • at a preferred embodiment Furthermore be provided that between the at least one three-phase and / or AC power source and AC and / or AC loads arranged switches are manually operated. This allows it the customer to switch off the self-consumption of self-generated electricity and to feed this completely into the net, if he so wishes.
  • following becomes a preferred embodiment a circuit arrangement according to the invention closer to the drawing explained.
  • The single figure shows a schematic diagram of a possible Embodiment of a circuit arrangement according to the invention.
  • It is delimited by dotted lines an internal electrical network 10 as well as a public supply network 11 shown. The public utility network has three phases L1, L2, L3 and a neutral conductor N. In the in-house power grid is a circuit arrangement 12 for current control between consumer-side current sources G1, G2, G3, G4 to Gn, the supply network 11 and electric power consumers V1, V2, V3, V4. The current source G1 is a three-phase current source, and the current sources G2 to Gn are AC sources. The individual power sources can be photovoltaic systems with inverters or even wind turbines or other generators. In the electrical consumers, the consumer V1 is a three-phase load (400 V) and the consumers V2, V3, V4 AC consumers, which are each connected to one of the phases L1, L2, L3.
  • The circuit arrangement 12 first creates a connection between the current sources G1 to Gn and the supply network 11 , The current sources G1 to Gn are to switch S1, S2, S3 and a counter Z1 with the phases L1, L2, L3 of the supply network 11 connected. When the switches S1, S2, S3 are closed, the power generated by the current sources G1 to Gn becomes the supply network 11 fed.
  • Next, the circuit arrangement 12 a connection between the supply network 11 and the consumers V1 to V4 ago. The three phases L1, L2, L3 are connected to the consumers V1, V2, V3 and V4 via a counter Z2 and switches S4, S5, S6. If the switches S4, S5 and S6 are at least partially closed, then the consumers V1, V2, V3, V4 can at least partially receive their power from the supply network 11 Respectively. The amount of the current drawn is detected by the counter Z2.
  • Around also a self-consumption of the generated by the current sources G1 to Gn Streams to allow through the consumers V1 to V4, are also the Phases L1, L2, L3 of the current sources G1 to Gn via switches S7 to S15 with each of the phases L1, L2, L3 of the consumers V1 to V4 connected. Furthermore is a counter Z3 provided the quantity of the on the phases L1, L2, L3 of the consumer V1 to V4 emitted self-generated current. This is also a remuneration self-generated and self-consumed electricity possible.
  • Next shows the circuit arrangement 12 a control device 20 which is connected to all controllable switches S1 to S15. The control device 20 is also connected to current measuring devices I1, I2, I3 in the phase lines of the current sources G1 to Gn and to current measuring devices I4, I5, I6 in the phase lines of the current consumers V1 to V4.
  • Show the current measuring devices I4 to I6 that the consumers V1 to V4 via at least one of the phases L1, L2, L3 require power and at the same time supply the power sources G1 to Gn at least partially and at least one of the phases L1, L2, L3 a current, so the controller 20 connect at least one of the phases L1, L2, L3 of the current sources G1 to Gn with at least one of the phases L1, L2, L3 of the power consumers V1 to V4 by closing the corresponding switches S7 to S15. At the same time, the control device 20 that phase L1, L2, L3, which receives its current from the current sources G1 to Gn, decouple by opening the associated switch S4 to S6 from the public network. Also, those phases L1, L2, L3 of the current sources G1 to Gn, which supply their current to the consumers V1 to V4, are opened by opening the associated switches S1 to S3 from the public grid 11 disconnected so that these phases deliver their power completely to the consumers V1 to V4 and not into the grid 11 feed.
  • What is produced by the power sources G1 to Gn on excess electricity will continue to be in the public grid 11 fed. If the power generated by the current sources G1 to Gn is insufficient to supply the consumers V1 to V4, then part of the required current can be obtained by closing the corresponding switches S4, S5, S6 from the public grid 11 be obtained.
  • The power steering can be done fully automatically depending on the required power and the amount of self-generated electricity. In addition, it can be provided that the switches S7 to S15 can be opened at least manually if the self-generated current of the current sources G1 to Gn is to be completely fed into the network. In this mode, of course, then all switches S4 to S6 are closed, so that the current required by the consumers V1 to V4 from the public network 11 can be obtained.

Claims (8)

  1. Circuit arrangement for current control between at least one consumer-side three-phase and / or alternating current source (G1 to Gn), in particular a photovoltaic system with an inverter, an electrical supply network ( 11 ) and electrical three-phase and / or AC consumers (V1 to V4), characterized in that all phases (L1, L2, L3) of the at least one three-phase and / or alternating current source (G1 to Gn) via controllable switch (S7 to S15) with the three-phase and / or AC consumers (V1 to V4) and via controllable switches (S1, S2, S3) and a three-phase counter or an alternating current counter (Z1) for each phase (L1, L2, L3) with the supply network ( 11 ) and that the three-phase and / or AC consumers (V1 to V4) via controllable switches (S4, S5, S6) and a three-phase meter or an AC meter (Z2) for each phase with the supply network ( 11 ) are connected.
  2. Circuit arrangement according to Claim 1, characterized that between the at least one three-phase and / or alternating current source (G1 to Gn) and the three-phase and / or AC consumers (V1 to V4) a three-phase meter or an AC meter (Z3) for each phase (L1, L2, L3) is arranged.
  3. Circuit arrangement according to claim 1 or 2, characterized characterized in that each phase (L1, L2, L3) of the at least one Three-phase and / or AC power source (G1 to Gn) via a controllable switch (S7 to S15) with each phase (L1, L2, L3) the three-phase and / or AC consumers (V1 to V4) connected is.
  4. Circuit arrangement according to one of the preceding claims, characterized in that it comprises a control device ( 12 ) having, for each phase (L1, L2, L3) of the at least one three-phase and / or alternating current source (G1 to Gn) and each phase (L1, L2, L3) of the three-phase and / or AC consumers (V1 to V4 ) provided current measuring devices (I1 to I6) and all controllable switches (S1 to S15) is connected.
  5. Circuit arrangement according to claim 4, characterized in that with the control device ( 12 ) some or all of the at least one three-phase and / or AC power source (G1 to Gn) and the three-phase and / or AC consumers (V1 to V4) arranged switches (S7 to S15) are closable when the three-phase and / or AC consumers (V1 to V4) consume power and the at least one three-phase and / or AC power source (G1 to Gn) provides power.
  6. Circuit arrangement according to Claim 4 or 5, characterized in that with the control device ( 12 ) between the at least one three-phase and / or alternating current source (G1 to Gn) and the supply network ( 11 ) arranged switches (S1, S2, S3) for one or more phases (L1, L2, L3) are closable when the at least one three-phase and / or alternating current source (G1 to Gn) provides more power than the three-phase and / or or AC consumers (V1 to V4) need.
  7. Circuit arrangement according to one of claims 4 to 6, characterized in that with the control device ( 12 ) between the supply network ( 11 ) and the three-phase and / or Wech Selstromverbrauchern (V1 to V4) arranged switches (S4, S5, S6) for one or more phases (L1, L2, L3) are closable when the three-phase and / or AC consumers (V1 to V4) require more power than the at least a three-phase and / or alternating current source (G1 to Gn) supplies.
  8. Circuit arrangement according to one of claims 3 to 7, characterized in that between the at least one Three-phase and / or AC power source (G1 to Gn) and the three-phase and / or AC consumers (V1 to V4) arranged switch (S7 to S15) are manually operable.
DE102009035399A 2009-07-30 2009-07-30 Circuit arrangement for current steering Withdrawn DE102009035399A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102009035399A DE102009035399A1 (en) 2009-07-30 2009-07-30 Circuit arrangement for current steering

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009035399A DE102009035399A1 (en) 2009-07-30 2009-07-30 Circuit arrangement for current steering
PCT/EP2010/004526 WO2011012272A2 (en) 2009-07-30 2010-07-23 Circuit assembly for current steering

Publications (1)

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DE102009035399A1 true DE102009035399A1 (en) 2011-02-03

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DE102009035399A Withdrawn DE102009035399A1 (en) 2009-07-30 2009-07-30 Circuit arrangement for current steering

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WO (1) WO2011012272A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014076446A1 (en) * 2012-11-16 2014-05-22 Torch Solar Technologies Limited A power management system
US9760956B2 (en) 2011-04-08 2017-09-12 Sma Solar Technology Ag Optimized load management

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1965483A1 (en) * 2007-02-27 2008-09-03 SMA Solar Technology AG Circuit for connecting an energy generation unit to the power grid

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JP2002204531A (en) * 2000-10-31 2002-07-19 Canon Inc Ac-interconnecting device and control method thereof
ITMI20022414A1 (en) * 2002-11-14 2004-05-15 Walter Cassani Plant for the exploitation of energy sources
WO2007111868A1 (en) * 2006-03-23 2007-10-04 Enphase Energy, Inc. Method and apparatus for converting direct current to alternating current
DE102007054647A1 (en) * 2007-11-15 2009-06-18 Siemens Ag Solar inverter with several parallel single inverters and with a higher-level electronic control unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1965483A1 (en) * 2007-02-27 2008-09-03 SMA Solar Technology AG Circuit for connecting an energy generation unit to the power grid

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Informationsblatt für EEG- und KWK-Anlagenbetreiber über die gesetzlichen Auswirkungen der Änderung des EEG und des KWKG 2009. Stadtwerke Schwäbisch Gmünd GmbH, Stand Mai 2009. Im Internet: http://www.stwgd.de/img_down/Strom%20_EEG_%20KWK_I fo.pdf [abgerufen 05.05.2010] *
Informationsblatt für EEG- und KWK-Anlagenbetreiber über die gesetzlichen Auswirkungen der Änderung des EEG und des KWKG 2009. Stadtwerke Schwäbisch Gmünd GmbH, Stand Mai 2009. Im Internet: http://www.stwgd.de/img_down/Strom%20_EEG_%20KWK_Info.pdf [abgerufen 05.05.2010]

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9760956B2 (en) 2011-04-08 2017-09-12 Sma Solar Technology Ag Optimized load management
WO2014076446A1 (en) * 2012-11-16 2014-05-22 Torch Solar Technologies Limited A power management system

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Publication number Publication date
WO2011012272A2 (en) 2011-02-03
WO2011012272A3 (en) 2011-06-30

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