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1.发明申请公开(公告)号：US20200083702A1
公开(公告)日：2020-03-12
申请号：US16613409
申请日：2018-07-04
Inventor： Xiangjun ZENG
IPC: H02H9/00
Abstract: The proposed invention discloses a safe processing method for active voltage reduction of a ground fault phase of a non-effective ground system, for use in safe processing of a ground fault of a neutral point non-effective ground generator or distribution network. Non-effective ground system side windings of a transformer are equipped with a plurality of shunting taps. When a single-phase ground fault occurs, the shunting tap of the fault phase winding is selected to be short-circuited to ground directly or through an impedance to reduce the fault phase voltage to ensure that the fault point voltage is less than the continuous burning voltage of a ground arc to meet a long-term non-stop safe operation requirements. The proposed method can eliminate the instantaneous single-phase ground fault, suppress the permanent single-phase ground fault current, and limit the rising amplitude of non-fault phase voltage and the risk of non-fault phase insulation breakdown.
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2.发明公开公开(公告)号：US20240006891A1
公开(公告)日：2024-01-04
申请号：US18343169
申请日：2023-06-28
Inventor： Dongqi LIU , Xiangjun ZENG , Yongpeng SHEN , Yong XU , Hao YAO , Kai DING , Wei DENG
CPC classification number: H02J3/381 , H02J3/466 , G05B13/027 , G05B13/042 , H02J2203/20 , H02J2300/20
Abstract: Provided is a two-stage self-organizing optimized aggregation method and system for distributed resources of a virtual power plant. First-stage aggregation oriented to a distribution transformer area is completed by taking a natural physical cluster composed of distributed energy resources in the distribution transformer area as a first stage, performing aggregation by using an edge computing server deployed in the distribution transformer area, constructing a generalized transformer area load model including wind power, photovoltaic power, and a load, aggregating distributed gas turbines and generators of small hydropower stations in the distribution transformer area into a unified virtual synchronous generator model, aggregating distributed energy storage devices in the distribution transformer area into a centralized virtual energy storage model; second-stage aggregation across distribution transformer areas is completed by uploading all parameters of the generalized transformer area load model, the virtual synchronous generator model, and the virtual energy storage model to a cloud end.
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公开(公告)号：US20210126450A1
公开(公告)日：2021-04-29
申请号：US16616975
申请日：2018-07-04
Inventor： Xiangjun ZENG
Abstract: The present invention discloses a safe operation method for voltage reduction arc suppression of a ground fault phase of a non-effective ground system, for use in ground fault safety operation of a neutral point non-effective ground generator or distribution network. When a single-phase ground fault occurs, an external voltage source is applied at a non-effective ground system side between a bus and the ground, or between a line and the ground, or between a neutral point and the ground, or between a shunting tap of a non-effective ground system side winding of a transformer and the ground, to reduce the fault phase voltage to be lower than the continuous burning voltage of a ground arc, thereby meeting the requirements of long-term non-stop safe operation. The operation means and control method effectively prevent power outages, and improve the reliability and security of power supply.
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