Title (en)
Systems of parallel operating power electronic converters
Title (de)
System zum Parallelbetrieb von Leistungshalbleiterumrichtern
Title (fr)
Système pour l'opération en parallèle de convertisseurs électroniques de puissance
Publication
EP 1770850 A1 20070404 (EN)
Application
EP 05405568 A 20051003
Priority
EP 05405568 A 20051003
Abstract (en)
The control means of each converter unit produces an output voltage based on reference signals (u* d , u* q ) that are generated from the active and
reactive components (P, Q) of each converters output power. A first reference signal for a reactive component of the output voltage (u* q ) is set to
zero, thus regulating the reactive component of the output voltage to zero. Therefore, only the active component is contributing to the actual output
voltage. The reference signal for the active component of the output voltage (u* d ) is produced based on the active power component (P) with
an active power vs. active voltage droop. To synchronize the frequencies of all converter units a reactive power vs. frequency droop is introduced
for each converter unit, regulating the frequency based on changes in the reactive power component (Q) of each converter unit. Since the control
means of each converter unit produces its reference signals based on the converter units own reactive and active power output, no communication is
necessary between the various converter units operating in parallel. Converter units can therefore be placed anywhere without communication.
Inventor
• PONNALURI SRINIVAS (CH)
• STEIMER PETER (CH)
Applicant
ABB SCHWEIZ AG (CH)
IPC 8 full level (invention and additional information)
H02M 7/48 (2007.01)
CPC (invention and additional information)
H02M 7/493 (2013.01)
Citation (applicant)
• T. KAWABATA: "Parallel Operation of Voltage Source Inverters", IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, vol. 24,
no. 2, March 1988 (1988-03-01), XP055078528, DOI: doi:10.1109/28.2868
• JANG-SIK YOO: "Parallel U.P.S. with an Instantaneous Current Sharing Control", IECON, IEEE, 1998, pages 568 - 573
• ANIL TULADHAR: "Control of Parallel Inverters in Distributed AC Power Systems with Consideration of Line Impedance Effect",
IEEE TRANSACTIONS ON INDUSTRIAL APPLICATIONS, vol. 36, no. 1, January 2000 (2000-01-01), XP011022717
Citation (search report)
• [Y] US 2004136214 A1 20040715 - TAN JINGTAO [TW], et al
• [YA] CHANDORKAR M C ET AL: "CONTROL OF PARALLEL CONNECTED INVERTERS IN STANDALONE AC SUPPLY
SYSTEMS", IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 29,
no. 1, January 1993 (1993-01-01), pages 136 - 143, XP000358874, ISSN: 0093-9994
• [A] TAMAI S ET AL: "Parallel operation of digital controlled UPS system", PROCEEDINGS OF THE INTERNATIONAL
CONFERENCE ON INDUSTRIAL ELECTRONICS,CONTROL AND INSTRUMENTATION (IECON). KOBE, OCT. 28 - NOV. 1,
1991, NES YORK, IEEE, US, vol. VOL. 1 CONF. 17, 28 October 1991 (1991-10-28), pages 326 - 331, XP010041810, ISBN:
0-87942-688-8
Cited by
CN103983880A
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
EPO simple patent family
EP 1770850 A1 20070404; CN 101278472 A 20081001; CN 101278472 B 20100929; EP 1932231 A2 20080618; HK 1122911 A1 20110513; US
2008211464 A1 20080904; US 7567064 B2 20090728; WO 2007038887 A2 20070412; WO 2007038887 A3 20071108
INPADOC legal status
2008-04-16 [18D] DEEMED TO BE WITHDRAWN
- Effective date : 20071005
2008-01-24 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID
- Ref Country Code : DE
- Ref Legal Event Code : 8566
2007-12-12 [AKX] PAYMENT OF DESIGNATION FEES
2007-04-04 [AK] DESIGNATED CONTRACTING STATES:
- Kind Code of Ref Document : A1
- Designated State(s) : AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK
TR
2007-04-04 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO
- Countries concerned : AL BA HR MK YU