WO2012105737A1 - Procédé et circuits pour suppression de courant de mode commun dans onduleur pv sans transformateur triphasé - Google Patents

Procédé et circuits pour suppression de courant de mode commun dans onduleur pv sans transformateur triphasé Download PDF

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Publication number
WO2012105737A1
WO2012105737A1 PCT/KR2011/005697 KR2011005697W WO2012105737A1 WO 2012105737 A1 WO2012105737 A1 WO 2012105737A1 KR 2011005697 W KR2011005697 W KR 2011005697W WO 2012105737 A1 WO2012105737 A1 WO 2012105737A1
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WO
WIPO (PCT)
Prior art keywords
terminal
connects
inverter
boost
pwm
Prior art date
Application number
PCT/KR2011/005697
Other languages
English (en)
Inventor
Ceu Pail
Original Assignee
Hyundai Heavy Industries Co., Ltd.
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 Hyundai Heavy Industries Co., Ltd. filed Critical Hyundai Heavy Industries Co., Ltd.
Priority to EP11857825.1A priority Critical patent/EP2671311A1/fr
Publication of WO2012105737A1 publication Critical patent/WO2012105737A1/fr

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    • 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
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • 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
    • 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
    • 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 subject of the invention is a method and circuits for common mode current depression in 3 phase transformerless PV inverter.
  • the invention is connected to the RCD (residual current detection) too.
  • the photovoltaic cells are organized into strings.
  • the strings are paralleled and connected to an inverter DC input. It is also well known that the strings have stray capacitance to the earth potential.
  • the common mode voltage generates common mode current through the stray capacitance of the strings and this current is sensed by RCD circuits. If the sensed common mode current exceeds the set protection level in that case the inverter will be separated from utility grid.
  • the efficiency can be increased in 3 phase PWM inverters by means of a 3rd harmonic component of the PWM reference signal. This makes possible that to feed the energy into the utility grid at less DC input voltage of the inverter. This solution reduces the losses of the switching devices of the inverter.
  • the applied additional 3rd harmonic reference signal cases 3rd harmonic common mode voltage what generate common mode current through the RCD circuit.
  • the advantage of our invention is that the solution does not cancel the additional 3rd harmonic PWM reference signal application, but limits its value in some special cases as thin film solar cells or special installation like very near cells to the ground. This way our invention can ensure a higher efficiency than other products.
  • the invention advantage is that the method and circuits are applicable with 2 and more level invetres and the controller can be built up in d,q or x,y reference frame too.
  • the DC energy is provided by A string which output 1is connected to B well known boost terminal 1and A string terminal 2 is connected B boost terminal 2.
  • the increased voltage from B boost output terminal 3 and 4 is connected to the well-known D inverter terminal 1 and 2.
  • D inverter R,S,T outputs go through the E RCD ring and connected to the F utility grid terminal R,S,T.
  • a string terminal 1 connected to C1 sray capacitance while terminal 2 is connected to C2 stray capacitance while C1 nad C2 stray capacitance other terminal are connected to the ground (earth) potential.
  • E RCD terminal 1 connects to H filter and G comparator terminal 1, while H filter terminal 2 connects to I modifier terminal 1.
  • I modifier terminal 2 connects J controller terminal 2 while J controller terminal 1 connects to K PWM terminal 3.
  • K PWM terminal 1 connects to B boost terminal 5 while K PWM terminal 2 connects to D inverter terminal 3.
  • B boost increases the DC voltage if necessary and forwards the DC voltage to the D inverter input.
  • the D inverter and the including sinusoidal filter converts the DC energy with the well-known PWM mode and feeds it through the E RCD into the AC utility grid.
  • E RCD measures the common mode current and gives the measured value to G comparator and H filter.
  • H filter forwards the 3rd harmonics only to the I modifier.
  • I modifier adjusts its input signal and limits its output signal and to the K controller.
  • K controller provides the right DC voltage and adjust the PWM base and 3rd harmonics reference value and optimize the additional 3rd harmonics PWM reference value .
  • K PWM unit provides the gating of the B boost and D inverter.
  • Figure 1 is a basis of one possible version of the invention.
  • Figure 2 is an operation of one possible version described in figure 1.

Landscapes

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

Abstract

Selon l'invention, l'énergie en courant continu est fournie par une chaîne A dont une sortie 1 est connectée à une borne 1 d'un survolteur B bien connu, une borne 2 de la chaîne A étant connectée à une borne 2 du survolteur B. L'augmentation de tension, provenant des bornes de sortie 3 et 4 du survolteur B, est connectée à des bornes 1 et 2 d'un onduleur D bien connu. Des sorties R, S, T de l'onduleur D passent par la boucle RCD E et sont connectées aux bornes R, S, T d'un réseau électrique F. La borne 1 de la chaîne A est connectée à une capacité parasite C1 alors que la borne 2 est connectée à une capacité parasite C2, les autres bornes des capacités parasites C1 et C2 étant connectées au potentiel de masse (terre). Une borne 1 de la boucle RCD E est connectée à des bornes 1 d'un filtre H et d'un comparateur G, alors qu'une borne 2 du filtre H est connectée à une borne 1 d'un modificateur I. Une borne 2 du modificateur I est connectée à une borne 2 d'un contrôleur J alors qu'une borne 1 du contrôleur J est connectée à une borne 3 d'un circuit PWM K. Une borne 1 du circuit PWM K est connectée à une borne 5 du survolteur B alors qu'une borne 2 du circuit PWM K est connectée à une borne 3 de l'onduleur D.
PCT/KR2011/005697 2011-02-04 2011-08-03 Procédé et circuits pour suppression de courant de mode commun dans onduleur pv sans transformateur triphasé WO2012105737A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11857825.1A EP2671311A1 (fr) 2011-02-04 2011-08-03 Procédé et circuits pour suppression de courant de mode commun dans onduleur pv sans transformateur triphasé

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HUP1102617 2011-02-04
HU1102617 2011-02-04

Publications (1)

Publication Number Publication Date
WO2012105737A1 true WO2012105737A1 (fr) 2012-08-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2011/005697 WO2012105737A1 (fr) 2011-02-04 2011-08-03 Procédé et circuits pour suppression de courant de mode commun dans onduleur pv sans transformateur triphasé

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Country Link
EP (1) EP2671311A1 (fr)
WO (1) WO2012105737A1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8982593B2 (en) 2012-04-27 2015-03-17 Rockwell Automation Technologies, Inc. Cascaded H-Bridge (CHB) inverter level shift PWM with rotation
US9007787B2 (en) 2012-08-13 2015-04-14 Rockwell Automation Technologies, Inc. Method and apparatus for bypassing Cascaded H-Bridge (CHB) power cells and power sub cell for multilevel inverter
US9083230B2 (en) 2013-06-20 2015-07-14 Rockwell Automation Technologies, Inc. Multilevel voltage source converters and systems
US9240731B2 (en) 2013-03-18 2016-01-19 Rockwell Automation Technologies, Inc. Power cell bypass method and apparatus for multilevel inverter
US9325252B2 (en) 2014-01-13 2016-04-26 Rockwell Automation Technologies, Inc. Multilevel converter systems and sinusoidal pulse width modulation methods
US9425705B2 (en) 2012-08-13 2016-08-23 Rockwell Automation Technologies, Inc. Method and apparatus for bypassing cascaded H-bridge (CHB) power cells and power sub cell for multilevel inverter
US9520800B2 (en) 2014-01-09 2016-12-13 Rockwell Automation Technologies, Inc. Multilevel converter systems and methods with reduced common mode voltage
US9559541B2 (en) 2015-01-15 2017-01-31 Rockwell Automation Technologies, Inc. Modular multilevel converter and charging circuit therefor
US9748862B2 (en) 2015-05-13 2017-08-29 Rockwell Automation Technologies, Inc. Sparse matrix multilevel actively clamped power converter
US9812990B1 (en) 2016-09-26 2017-11-07 Rockwell Automation Technologies, Inc. Spare on demand power cells for modular multilevel power converter
US10158299B1 (en) 2018-04-18 2018-12-18 Rockwell Automation Technologies, Inc. Common voltage reduction for active front end drives
US11211879B2 (en) 2019-09-23 2021-12-28 Rockwell Automation Technologies, Inc. Capacitor size reduction and lifetime extension for cascaded H-bridge drives
US11342878B1 (en) 2021-04-09 2022-05-24 Rockwell Automation Technologies, Inc. Regenerative medium voltage drive (Cascaded H Bridge) with reduced number of sensors
US11460488B2 (en) 2017-08-14 2022-10-04 Koolbridge Solar, Inc. AC electrical power measurements
US11509163B2 (en) 2011-05-08 2022-11-22 Koolbridge Solar, Inc. Multi-level DC to AC inverter
US11901810B2 (en) 2011-05-08 2024-02-13 Koolbridge Solar, Inc. Adaptive electrical power distribution panel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725913A (en) * 1985-05-14 1988-02-16 Bicc Public Limited Co. Residual current detector
US20080291706A1 (en) * 2007-05-23 2008-11-27 Advanced Energy Industries, Inc Common mode filter system and method for a solar power inverter
US20100226160A1 (en) * 2009-03-09 2010-09-09 Sma Solar Technology Ag Power Generation System and Inverter for Feeding Power Into a Three-Phase Grid

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725913A (en) * 1985-05-14 1988-02-16 Bicc Public Limited Co. Residual current detector
US20080291706A1 (en) * 2007-05-23 2008-11-27 Advanced Energy Industries, Inc Common mode filter system and method for a solar power inverter
US20100226160A1 (en) * 2009-03-09 2010-09-09 Sma Solar Technology Ag Power Generation System and Inverter for Feeding Power Into a Three-Phase Grid

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
T.KEREKES ET AL., IEEE 2008 PAPER, 2 July 2008 (2008-07-02), XP008171183 *

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11509163B2 (en) 2011-05-08 2022-11-22 Koolbridge Solar, Inc. Multi-level DC to AC inverter
US11791711B2 (en) 2011-05-08 2023-10-17 Koolbridge Solar, Inc. Safety shut-down system for a solar energy installation
US11901810B2 (en) 2011-05-08 2024-02-13 Koolbridge Solar, Inc. Adaptive electrical power distribution panel
US8982593B2 (en) 2012-04-27 2015-03-17 Rockwell Automation Technologies, Inc. Cascaded H-Bridge (CHB) inverter level shift PWM with rotation
US9007787B2 (en) 2012-08-13 2015-04-14 Rockwell Automation Technologies, Inc. Method and apparatus for bypassing Cascaded H-Bridge (CHB) power cells and power sub cell for multilevel inverter
US10305368B2 (en) 2012-08-13 2019-05-28 Rockwell Automation Technologies, Inc. Method and apparatus for bypassing Cascaded H-Bridge (CHB) power cells and power sub cell for multilevel inverter
US9425705B2 (en) 2012-08-13 2016-08-23 Rockwell Automation Technologies, Inc. Method and apparatus for bypassing cascaded H-bridge (CHB) power cells and power sub cell for multilevel inverter
US9912221B2 (en) 2012-08-13 2018-03-06 Rockwell Automation Technologies, Inc. Method and apparatus for bypassing cascaded h-bridge (CHB) power cells and power sub cell for multilevel inverter
US9787213B2 (en) 2013-03-18 2017-10-10 Rockwell Automation Technologies, Inc. Power cell bypass method and apparatus for multilevel inverter
US9240731B2 (en) 2013-03-18 2016-01-19 Rockwell Automation Technologies, Inc. Power cell bypass method and apparatus for multilevel inverter
US9083230B2 (en) 2013-06-20 2015-07-14 Rockwell Automation Technologies, Inc. Multilevel voltage source converters and systems
US9520800B2 (en) 2014-01-09 2016-12-13 Rockwell Automation Technologies, Inc. Multilevel converter systems and methods with reduced common mode voltage
US9325252B2 (en) 2014-01-13 2016-04-26 Rockwell Automation Technologies, Inc. Multilevel converter systems and sinusoidal pulse width modulation methods
US9559541B2 (en) 2015-01-15 2017-01-31 Rockwell Automation Technologies, Inc. Modular multilevel converter and charging circuit therefor
US9748862B2 (en) 2015-05-13 2017-08-29 Rockwell Automation Technologies, Inc. Sparse matrix multilevel actively clamped power converter
US9812990B1 (en) 2016-09-26 2017-11-07 Rockwell Automation Technologies, Inc. Spare on demand power cells for modular multilevel power converter
US11460488B2 (en) 2017-08-14 2022-10-04 Koolbridge Solar, Inc. AC electrical power measurements
US10158299B1 (en) 2018-04-18 2018-12-18 Rockwell Automation Technologies, Inc. Common voltage reduction for active front end drives
US11211879B2 (en) 2019-09-23 2021-12-28 Rockwell Automation Technologies, Inc. Capacitor size reduction and lifetime extension for cascaded H-bridge drives
US11342878B1 (en) 2021-04-09 2022-05-24 Rockwell Automation Technologies, Inc. Regenerative medium voltage drive (Cascaded H Bridge) with reduced number of sensors

Also Published As

Publication number Publication date
EP2671311A1 (fr) 2013-12-11

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