State Grid Corporation of China

State Grid Jiangsu Electric Power Company

Jiangsu Electric Power Research Institute Co., Ltd.

State Grid Jiangsu Electric Power Co., Ltd. Research Institute

State Grid Jiangsu Electric Power Research Institute

Qun Li

Jian Liu

Jinggang Yang

Peng Li

Yubo Yuan

Shu Chen

Xiaodong Yuan

Mingming Shi

Ruihuang Liu

Yunlong Jiang

Chenyu Zhang

Wei Su

Kun Yang

Lei Gao

Jing Chen

Shuyi Zhuang

Jianhua Qin

Xin Fang

Xiaolong Xiao

Tiankui Sun

Xinyao Si

Xuefeng Ge

Huiyu Miao

Jiankun Liu

Ningyu Zhang

Chenqing Wang

Jiahao Guo

Disclosed is a low-voltage DC power distribution fast switching device. The device includes a positive output terminal electrically connected to a positive pole of a load, and no less than two switching circuits connected in parallel with each other; the switching circuit includes a positive input terminal electrically connected to a positive pole of common negative power supplies, a supplementary diode cluster composed of no less than one diode connected in series, and a thyristor connected between the positive input terminal and the positive output terminal; the positive input terminal is electrically connected to an anode of the supplementary diode cluster and an anode of the thyristor, and the positive output terminal is electrically connected to a cathode of the complementary diode cluster and a cathode of the thyristor.

Low-voltage DC power distribution fast switching device

Disclosed is a fault current controller for a direct current power grid, which includes a primary circuit and a controller. The primary circuit includes an inductor, a filter capacitor, a resistor, an IGBT switch, a diode, a contactor and a Hall current sensor. The inductor, a first resistor and a second contactor are connected in series and are connected to a first contactor in parallel. A first branch including a second resistor and a first diode, a second branch including a third resistor and a second diode, and the inductor are connected in parallel; the filter capacitor, the IGBT switch and the first resistor are connected in parallel. The Hall current sensor is arranged in the series circuit. The controller controls the IGBT switch and the two contactors in the primary circuit to form different on-off combinations.

Fault current controller for a direct current power grid

The present invention discloses a novel Unified Power Flow Controller UPFC and its control method. Supposing that one end of DC converter is connected to the DC transmission line of HVDC converter station or substation and the other end is connected to the DC side of a series converter, the AC output voltage of the series converter can be controlled to regulate the line power of the UPFC for operation in UPFC and SSSC mode. In addition, when the number of transformers and shunt converters is decreased at the shunt side of the UPFC, the HVDC Converter Station can be used to provide active power for the series converter of UPFC, which can effectively reduce operation costs and ensure stable operation of power grid. Therefore, there is a bright application prospect for the invention.

Unified power flow controller and control method thereof

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Jiangsu, China

Qun Li