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    • 8. 发明申请
    • GRID-CONNECTED INVERTER APPARATUS AND CONTROL METHOD THEREFOR
    • 网格连接的逆变器装置及其控制方法
    • US20140126259A1
    • 2014-05-08
    • US14129882
    • 2012-06-28
    • Hirokazu Inoue
    • Hirokazu Inoue
    • H02M7/5387
    • H02M7/5387G01R31/3275H02J3/381H02J3/383H02J3/386H02J3/387H02M1/32H02M7/48Y02E10/563Y02E10/763
    • A grid-connected inverter apparatus includes: an inverter 50 for converting a DC output based on power generated from a power generation equipment 100 into an AC; a DC voltage measuring unit 40 for measuring a DC voltage on a DC input side of the inverter 50; a grid interconnection switch 70 having two independent relay switches 71, 72 each corresponding to phases of a grid power system 110 to which the inverter 50 is connected; and a control unit 90 for controlling the two relay switches 71, 72, such that the control unit 90, after opening the two relay switches 71, 72, changes the relay switch 71 such that the opening control is changes to closing control and, based on a change in the DC voltage measured by the DC voltage measuring unit 40 before and after the changing control, determines whether the relay switch 72 is faulty.
    • 并网逆变器装置包括:反相器50,用于将基于从发电设备100产生的电力的直流输出转换为交流电; 用于测量逆变器50的直流输入侧的直流电压的直流电压测量单元40; 电网互连开关70具有两个独立的继电器开关71,72,每个独立的继电器开关71,72对应于逆变器50连接到的电力系统110的相位; 以及用于控制两个继电器开关71,72的控制单元90,使得控制单元90在打开两个继电器开关71,72之后改变继电器开关71,使得开启控制变为关闭控制,并且基于 在改变控制之前和之后由直流电压测量单元40测量的直流电压的变化确定继电器开关72是否故障。