JP4322250B2 - トランスレス型系統連係電力変換回路 - Google Patents
トランスレス型系統連係電力変換回路 Download PDFInfo
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- JP4322250B2 JP4322250B2 JP2005377454A JP2005377454A JP4322250B2 JP 4322250 B2 JP4322250 B2 JP 4322250B2 JP 2005377454 A JP2005377454 A JP 2005377454A JP 2005377454 A JP2005377454 A JP 2005377454A JP 4322250 B2 JP4322250 B2 JP 4322250B2
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- 238000006243 chemical reaction Methods 0.000 title claims description 64
- 239000003990 capacitor Substances 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 238000010248 power generation Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
-
- 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
-
- 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
- H02M7/53—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 using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Description
図2は、出力端に変圧器を増設した電力変換回路の図である。この変圧器がもつ絶縁特性により、系統側および直流側を同時に接地しても、異常な電流は流れることがなく、また、直流電源が非接地の太陽電池パネルでの浮遊容量による高周波電流の遮断も行える。しかし、変圧器を増設することで電力変換装置全体の体積の増大、コストの増加及び変換効率の低下をもたらす。
また、図7に示すように、二段の電力変換回路で構成した単相二線の電力変換回路においても、直流、交流の両方を接地する場合、図8に示すように、電力変換回路の出力端に絶縁変圧器を設置しなければ、系統と連係して給電することができない。
図9に、本発明の二段で構成した三相三線式電力変換回路の実施例の回路図を示す。本実施例の三相三線式電力変換回路10は、昇降圧型コンバータ(Buck-Boost Converter)20と二組のハーフブリッジ式インバータ(Half-Bridge Inverter)30とからなるものである。前記の昇降圧型コンバータ20は、コンデンサ(C1、C2)で分割された直流電圧を調整するためのもので、第1の主スイッチング素子Q5、一組の鉄心を共用する第1及び第2のインダクタ(L1、L2)、二つ(第1の及び第2)の受動素子(D1、D2)及び二つ(第1の及び第2)のコンデンサ(C1、C2)を備える。前記ハーフブリッジ式インバータ30は、4つの主スイッチング素子(Q1〜Q4)で構成され、前記二つの直流電圧を交流電圧に変換して系統に電力を送電する。
前記の第2のコンデンサC2のプラス端は接地端ノード1に接続し、C2のマイナス端は第2の受動素子D2のプラス端に接続する。また第1のコンデンサC1のプラス端は第1の受動素子D1のマイナス端に接続し、C1のマイナス端は接地端ノード1に接続する。
前記インダクタL1、L2の磁気的カプリングを通じて、元の単一直流電源入力V1を二つの直流電源V3、V4に変換させることで、直流側と交流側の両回路が同時に接地システムになった場合、変換回路のノード1が共通接地点となり、二つの電源V3、V4からハーブブリッジインバータを介して適切な回路経路によりエネルギーを交流側に伝送することができる。
本発明を適用した実施例の電力変換回路と従来の電力変換回路とを比較した結果を表1に示す。
前記全ての図面及び説明は、単なる本発明の実施例にすぎず、当領域を熟知している者が前記の説明に基づいてその他の様々改良の何れも、本願の発明精神及び以下の特許請求の範囲内に属するべきである。
Claims (3)
- 発電システムが出力する直流電源を交流電源に変換して系統に電力を送電するために用いられるトランスレス型系統連係電力変換回路であって、
前記直流電源を直列に分割した二つの直流電圧を調整する昇降圧型コンバータと、
前記二つの直流電圧を交流電源に変換して系統に電力を給電するために用いられる、少なくとも一組のハーフブリッジ式インバータと、
を備え、
前記昇降圧型コンバータは、
入力端がこの入力直流電圧のプラス端上に直列に接続する第1スイッチング素子と、
第1インダクタの一端が接地端に接続され、第2インダクタの一端が前記第1スイッチング素子の出力端に直列に接続し、第2インダクタの他端が前記直流電圧のマイナス端に接続して接地端に接続された、鉄心を共用する第1インダクタ及び第2インダクタと、
プラス端が前記第1インダクタの他端に直列に接続する第1受動素子と、
マイナス端が前記第1スイッチング素子の出力端に直列に接続する第2受動素子と、
プラス端が前記第1受動素子のマイナス端に直列に接続しマイナス端が前記接地端に接続される第1コンデンサと、
プラス端が前記接地端に接続してマイナス端が前記第二受動素子のプラス端に接続される第2コンデンサと、
を有することを特徴とするトランスレス型系統連係電力変換回路。 - 前記ハーフブリッジ式インバータは、三相電力変換であって、四つのスイッチング素子を有する請求項1記載のトランスレス型系統連係電力変換回路。
- 前記ハーフブリッジ式インバータは、単相電力変換であって、二つのスイッチング素子を有する請求項1記載のトランスレス型系統連係電力変換回路。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW094129415A TW200709544A (en) | 2005-08-29 | 2005-08-29 | Transformer-free power conversion circuit for parallel connection with commercial electricity system |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007068385A JP2007068385A (ja) | 2007-03-15 |
JP4322250B2 true JP4322250B2 (ja) | 2009-08-26 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2005377454A Active JP4322250B2 (ja) | 2005-08-29 | 2005-12-28 | トランスレス型系統連係電力変換回路 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7440300B2 (ja) |
JP (1) | JP4322250B2 (ja) |
TW (1) | TW200709544A (ja) |
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Publication number | Publication date |
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US7440300B2 (en) | 2008-10-21 |
TW200709544A (en) | 2007-03-01 |
TWI335125B (ja) | 2010-12-21 |
US20070047277A1 (en) | 2007-03-01 |
JP2007068385A (ja) | 2007-03-15 |
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