Schneider Electric Industries Sas

Shanghai Nuclear Engineering Research & Design Institute

Jian Qiu

Yu Chen

Yong Wang

Cheng Ye

Mingguang Zheng

Jinquan Yan

Baoyun Bi

Honghui Ge

Guoxing Gu

Yuanwei Ye

Xiankang Dong

Yun Ling

Fuzu Miao

Zufeng Xia

Embodiments of the present disclosure provide method, controller and system for regulating a current of a coil. The method comprises: obtaining a first sample value of the current of the coil at a first moment, the first sample value being associated with a duty cycle of a PWM signal applied to a control end of a switch and the switch being coupled in series with the coil; obtaining a second sample value of the current of the coil at a second moment; determining a difference value between the first and the second sample values; and updating the duty cycle of the PWM signal based on the difference value to regulate the current of the coil. According to embodiments of the present disclosure, the inrush current of the coil generated at the moment of closing the contactor can be limited to a target current value, so as to increase the service life of the contactor.

Method, controller and system for regulating a current of a coil

A passive cooling system for a reactor core of a large-scale pressurized water reactor nuclear power plant includes a shield building having an outer wall and a through air inlet arranged on an upper part of the outer wall, a water tank arranged at an upper part of the shield building, a cooling water distribution plate arranged above a top of a containment within the shield building, a spray pipe arranged at an inside of the top of the shield building and having a water inlet end and a water outlet end, wherein the water inlet end is connected to a bottom of the water tank and the water outlet end is extended to be above the cooling water distribution plate, and an air deflector arranged between the shield building and the containment and having an upper end connected to an inside of the top of the shield building.

Completely passive cooling system for reactor core after accident of large-scale pressurized water reactor nuclear power plant

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Shanghai, China

Jian Qiu