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1. 发明申请

US20160373003A1 APPARATUS AND METHOD FOR PROTECTING GRID-CONNECTED INVERTER FROM OCCURRENCE OF LOW GRID VOLTAGE 有权
标题翻译：保护网络连接逆变器与低电压电压的装置及方法
公开(公告)号：US20160373003A1
公开(公告)日：2016-12-22
申请号：US14898775
申请日：2014-06-20
申请人： POSCO ENERGY CO., LTD.
发明人： Jeong Heum LEE , Sang Ho MOON , Ju Young CHANG , Jae Sig KIM , Jin Su LEE
IPC分类号： H02M1/32 , H02M1/08 , H02J3/00 , H02M7/44
CPC分类号： H02M1/32 , H02J3/00 , H02M1/08 , H02M7/44 , H02M7/537 , H02M2001/0009
摘要： An apparatus for protecting a grid-connected inverter from a low grid voltage includes a first output current sensor configured to sense an output current of a grid-connected inverter, a first output current calculator configured to calculate a D-axis current and a Q-axis current of the output current to obtain the output current that is sensed, and a first output current controller configured to determine whether a difference between the output current and a reference current exceeds a predetermined range, and to decrease the output current by a predetermined value when the difference between the output current and the reference current exceeds the predetermined range.
摘要翻译：一种用于保护并网逆变器免受低电网电压的装置包括：第一输出电流传感器，被配置为感测并网逆变器的输出电流;第一输出电流计算器，被配置为计算D轴电流和Q- 以获得所检测的输出电流;以及第一输出电流控制器，被配置为确定输出电流和参考电流之间的差是否超过预定范围，并且将输出电流减小预定值当输出电流和参考电流之间的差超过预定范围时。

2. 发明申请

US20160285355A1 APPARATUS FOR COMPENSATING FOR RIPPLE AND OFFSET OF INVERTER AND METHOD THEREFOR 有权
标题翻译：用于补偿反相器的纹波和偏移量的装置及其方法
公开(公告)号：US20160285355A1
公开(公告)日：2016-09-29
申请号：US14442618
申请日：2013-11-14
申请人： POSCO ENERGY CO., LTD.
发明人： Jeong Heum LEE , Sang Ho MOON , Ju Young CHANG , Jae Sig KIM
IPC分类号： H02M1/14 , H02M7/42
CPC分类号： H02M1/14 , H02M1/12 , H02M1/15 , H02M7/42 , H02M7/5387 , H02M2001/0009
摘要： An apparatus and method for compensating for a ripple and offset of an inverter and an apparatus and method for compensating for a ripple and offset of an inverter which removes a ripple component by compensating for an offset component included in a signal input to the inverter from an inverter controller. A method that senses a direct current (DC) input to an inverter from an inverter controller and an alternating current (AC) output from the inverter and removes a ripple component included in the DC based on the sensed currents, a method that removes a ripple component included in a reference voltage that is output from an inverter controller and is input to an inverter, and a method that compensates for an offset component of an AC voltage/AC used for inverter control and reduces a ripple component corresponding to an output frequency of an inverter.
摘要翻译：一种用于补偿逆变器的纹波和偏移的装置和方法以及用于补偿逆变器的纹波和偏移的装置和方法，该逆变器的纹波和偏移通过从输入到逆变器的信号中补偿包括的偏移分量来去除纹波分量，变频器控制器。一种从逆变器控制器感测到逆变器的直流（DC）输入和来自逆变器的交流（AC）输出的方法，并且基于感测的电流去除包括在DC中的纹波分量的方法，去除纹波包括在从逆变器控制器输出并被输入到逆变器的参考电压中的分量，以及补偿用于逆变器控制的AC电压/ AC的偏移分量的方法，并且减少对应于逆变器控制的输出频率的纹波分量逆变器。

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