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    • 5. 发明授权
    • UNINTERRUPTABLE POWER SUPPLY SYSTEM WITH FAULT CLEAR CAPABILITY
    • 具有故障清除功能的不间断电源系统
    • EP3096435B1
    • 2018-04-18
    • EP16166047.7
    • 2016-04-19
    • ABB Schweiz AG
    • Paatero, Esa-Kai
    • H02J9/06H02M7/04
    • H02J9/06H02M3/04H02M7/04H02M7/44
    • The present invention provides an uninterruptable power supply system (100) comprising a first AC source (108) providing three-phase AC power via a four-wire AC-power supply line (112); a DC source (110) providing DC power via a DC power supply line (114), and a power converter (102) receiving AC power from the first AC source (108) and/or DC power from the DC source (110) and delivering two wire DC power to a load (118) via a DC output line (116), whereby one pole of the DC output line (116) is connected to the neutral reference of the four-wire AC-power supply line (112), the uninterruptable power supply system (100) further comprises a bypass device (142) for passing power from its output side (106) to the DC output line (116), whereby the bypass device (142) and the power converter (102) are connected in parallel to the DC output line (116), and the bypass device (142) comprises at least one switching unit (144), which receives AC power at its input side, and a control unit (138), whereby the switching unit (144) is controlled by the control unit (138) to supply pulsed power from an AC power supply with essentially the same polarity as the DC output line (116). The present invention also provides a method for realizing a bypass in the above uninterruptable power supply system (100).
    • 10. 发明公开
    • DC-TO-AC POWER CONVERTER
    • DC-TO-AC电源转换器
    • EP3224940A1
    • 2017-10-04
    • EP15793841.6
    • 2015-11-12
    • CE+T Power Luxembourg
    • BLEUS, PaulFREBEL, FabriceJOANNES, ThierryMILSTEIN, François
    • H02M7/493H02M7/49
    • H02M7/04H02M1/08H02M1/14H02M3/156H02M7/49H02M7/493H02M2001/0048
    • The present invention comprises a DC-to-AC power converter (1) comprising: - a current-type DC-to-AC converter (70) having a first DC input (80) and a first AC output (85), said first DC input (80) being connected in parallel to said main DC input (10) and said first AC output (85) being connected in parallel to said main AC output (20); and - control means (110) for : - controlling said bidirectional voltage-type DC-to-AC converter (50) for delivering at said first AC output-input (65) a substantially sinusoidal AC voltage of said fundamental frequency f 0 ; - controlling said current-type DC-to-AC converter (70) for delivering at said first AC output (85) a substantially quasi square-type AC current of said fundamental frequency f 0 and substantially in phase with said substantially sinusoidal AC voltage; - imposing that at least 70% of said rated current is provided by said current-type DC-to-AC converter (70).
    • 本发明包括直流 - 交流电力转换器(1),其包括: - 具有第一直流输入(80)和第一交流输出(85)的电流型直流 - 交流转换器(70),所述第一 DC输入端(80)并联连接到所述主DC输入端(10),所述第一AC输出端(85)并联连接到所述主AC输出端(20); 以及 - 控制装置(110),用于: - 控制所述双向电压型DC-AC转换器(50),用于在所述第一AC输出端(65)传送基本上为所述基频f 0的正弦AC电压; - 控制所述电流型直流 - 交流转换器(70),用于在所述第一交流输出端(85)传送基本上为所述基频f 0并基本与所述基本正弦交流电压同相的准方形交流电; - 施加所述额定电流的至少70%由所述电流型DC-AC转换器(70)提供。