KR101104595B1 - 고립운전 판정 방법 - Google Patents
고립운전 판정 방법 Download PDFInfo
- Publication number
- KR101104595B1 KR101104595B1 KR1020090020487A KR20090020487A KR101104595B1 KR 101104595 B1 KR101104595 B1 KR 101104595B1 KR 1020090020487 A KR1020090020487 A KR 1020090020487A KR 20090020487 A KR20090020487 A KR 20090020487A KR 101104595 B1 KR101104595 B1 KR 101104595B1
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- South Korea
- Prior art keywords
- output signal
- pll
- inverter
- frequency
- phase
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000002955 isolation Methods 0.000 claims abstract description 16
- 238000010248 power generation Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
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- 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
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- 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
- H02J3/472—For selectively connecting the AC sources in a particular order, e.g. sequential, alternating or subsets of sources
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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
- 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
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- 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
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
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- 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
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- 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
-
- 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
Abstract
Description
Claims (8)
- PLL 제어 과정에서 인버터 출력 신호의 위상을 구하는 단계;PLL 위상 동기를 위한 레퍼런스 전류에 상기 인버터 출력 신호의 주파수와 기준 주파수의 차를 증폭하여 반영하는 단계;상기 반영된 레퍼런스 전류를 이용하여 PLL 제어된 출력 신호를 생성하는 단계;상기 PLL 제어된 출력 신호의 허수 성분을 분리하는 단계; 및상기 분리된 허수 성분을 기초로, 고립운전의 발생 여부를 판단하는 단계;를 포함하는 인버터에서의 고립운전 판정 방법.
- 제 1 항에 있어서,상기 인버터 출력 신호의 위상을 구하는 단계는,인버터의 PLL 제어기에서 수행되는 것을 특징으로 하는 고립운전 판정 방법.
- 제 1 항에 있어서,상기 PLL 제어된 출력 신호를 생성하는 단계는,상기 레퍼런스 전류에 따른 위상을 가지고, 계통으로 공급되는 전류에 대한 실효치의 크기를 가지는 사인파 형태의 전류를 생성하는 것을 특징으로 하는 고립운전 판정 방법.
- 제 1 항에 있어서,태양광 발전기가 생산한 전력을 변환하여 계통 및 부하에 공급하는 인버터에서 수행되는 것을 특징으로 하는 고립운전 판정 방법.
- 제 5 항에 있어서,상기 PLL 제어는,상기 인버터의 공급 전력의 위상과, 상기 계통의 위상을 맞추기 위한 것임을 특징으로 하는 고립운전 판정 방법.
- 태양광 발전기; 및 상기 태양광 발전기가 생성한 전력을 변환하여 부하 및 계통으로 공급하는 인버터를 포함하는 태양광 발전 시스템에 있어서,상기 인버터는,PLL 제어 과정에서 인버터 출력 신호의 위상을 구하는 단계;PLL 위상 동기를 위한 레퍼런스 전류에 상기 인버터 출력 신호의 주파수와 기준 주파수의 차를 증폭하여 반영하는 단계;상기 반영된 레퍼런스 전류를 이용하여 PLL 제어된 출력 신호를 생성하는 단계;상기 PLL 제어된 출력 신호의 허수 성분을 분리하는 단계; 및상기 분리된 허수 성분을 기초로, 고립운전의 발생 여부를 판단하는 단계;를 수행하여 고립운전 상태를 판정하는 것을 특징으로 하는 태양광 발전 시스템.
- 제 7 항에 있어서,상기 기준 주파수는, 계통의 전원 주파수인 것을 특징으로 하는 태양광 발전 시스템.
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KR20100102009A KR20100102009A (ko) | 2010-09-20 |
KR101104595B1 true KR101104595B1 (ko) | 2012-01-12 |
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Citations (1)
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KR20070025269A (ko) * | 2005-09-01 | 2007-03-08 | 울산대학교 산학협력단 | 자동 위상 이동법에 의한 고립운전 검출장치 |
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KR20070025269A (ko) * | 2005-09-01 | 2007-03-08 | 울산대학교 산학협력단 | 자동 위상 이동법에 의한 고립운전 검출장치 |
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