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1.发明公开公开(公告)号：US20240258916A1
公开(公告)日：2024-08-01
申请号：US17925324
申请日：2022-09-26
申请人： State Grid Chongqing Electric Power Co. Electric Power Research Institute , State Grid Corporation of China
发明人： Hui Fang , Jingsen Zhou , Yongtao Chen , Fan Mu , Shengyi Zhu , Cheng Wang , Lei Li , Hongji Xiang , Yanan Yu , Qiang Xiao , Lining Hu , Zhongyi Wen
摘要： A modulation method for a direct current (DC) coupling converter with less DC voltage sensors includes: obtaining a voltage modulated wave vr* and a current reference value ig* of the DC coupling converter; performing judgment on the voltage modulated wave vr* and the current reference value ig*, and determining a switch state of the DC coupling converter based on a result of the judgment; and when a DC voltage sensor of an electrolytic capacitor of an intermediate power module is removed, modulating a DC voltage sensor based on the voltage modulated wave vr* and a difference between DC voltages on electrolytic capacitors of the other two power modules. When the intermediate DC-side voltage sensor is removed, DC voltages of various modules of a converter system of a DC coupling power unit can still be balanced, and quality of a grid-connected current is not affected by a fault.
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公开(公告)号：US11867616B2
公开(公告)日：2024-01-09
申请号：US17251810
申请日：2020-10-29
申请人： State Grid Chongqing Electric Power Co. Electric Power Research Institute , State Grid Corporation of China
发明人： Qiang Yao , Shiling Zhang , Yulong Miao , Yongtao Chen , Xintian Li
IPC分类号： G01N21/3504 , G01J3/42 , G01N21/39
CPC分类号： G01N21/3504 , G01J3/42 , G01N21/39 , G01J2003/423
摘要： Disclosed is an optical detection system for detecting a decomposition product of a high-voltage device, including: a measurement gas chamber and a measurement host. The measurement gas chamber is disposed on the high-voltage device and is in communication with a gas chamber of the high-voltage device, a collimator and a reflector are disposed on two sides of the measurement gas chamber respectively, and the measurement host is connected to the collimator. The collimator is used for emitting measurement laser to the measurement gas chamber according to a laser signal sent by the measurement host, and receiving reflected laser from the reflector and transmitting the reflected laser to the measurement host. In the present invention, data collection and backhaul between a measurement host and a measurement gas chamber are implemented through a laser signal, thus avoiding electromagnetic interference and improving the safety of measurement for a high-voltage device.
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公开(公告)号：US20220317032A1
公开(公告)日：2022-10-06
申请号：US17251810
申请日：2020-10-29
申请人： State Grid Chongqing Electric Power Co. Electric Power Research Institute , State Grid Corporation of China
发明人： Qiang Yao , Shiling Zhang , Yulong Miao , Yongtao Chen , Xintian Li
IPC分类号： G01N21/3504 , G01J3/42 , G01N21/39
摘要： Disclosed is an optical detection system for detecting a decomposition product of a high-voltage device, including: a measurement gas chamber and a measurement host. The measurement gas chamber is disposed on the high-voltage device and is in communication with a gas chamber of the high-voltage device, a collimator and a reflector are disposed on two sides of the measurement gas chamber respectively, and the measurement host is connected to the collimator. The collimator is used for emitting measurement laser to the measurement gas chamber according to a laser signal sent by the measurement host, and receiving reflected laser from the reflector and transmitting the reflected laser to the measurement host. In the present invention, data collection and backhaul between a measurement host and a measurement gas chamber are implemented through a laser signal, thus avoiding electromagnetic interference and improving the safety of measurement for a high-voltage device.
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