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Nonlinear control system and method suitable for direct current charging station

A nonlinear control and nonlinear system technology, applied in the field of nonlinear control systems, can solve problems such as the impact of power grid voltage impact, and achieve the effect of impact mitigation and suppression of the impact of bus voltage

Active Publication Date: 2022-04-29
ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO +3
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a nonlinear control system and method suitable for DC charging stations, which can solve the impact on the grid voltage caused by electric vehicles and other high-power loads connected to the grid

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  • Nonlinear control system and method suitable for direct current charging station
  • Nonlinear control system and method suitable for direct current charging station
  • Nonlinear control system and method suitable for direct current charging station

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Embodiment Construction

[0060] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0061] A nonlinear control system suitable for DC charging stations such as figure 1 As shown, it is set on the line between the DC bus and the load, including the electric vehicle fast charging pile (FCS), the machine-side converter, the flywheel energy storage system (FESS) and the nonlinear control system of the flywheel energy storage system, where , the electric vehicle fast charging pile is used to provide charging services for electric vehicles, the machine-side converter is used for AC-DC conversion of current, the flywheel energy storage system is used to provide second-level or minute-level charging and discharging services, and the flywheel energy storage system is not The linear control system is used to control the flywheel energy storage system to reduce the impact of the charge and discharge of the flywheel energy storage system on the grid; an...

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Abstract

The invention relates to a nonlinear control system and method suitable for a direct current charging station, and the system comprises an electric vehicle quick charging pile, a machine side converter, a flywheel energy storage system and a nonlinear control system of the flywheel energy storage system, and meanwhile, a nonlinear model of a flywheel energy storage-electric vehicle quick charging station system is established. The bus voltage control effect and the energy storage output current control precision of the fast charging station are researched, through an effective control method, the capacity of fast responding to load current sudden change and flywheel rotating speed change is provided, and a corresponding energy storage system charging and discharging control strategy is designed. The influence of flywheel rotating speed change and load access on the bus voltage can be effectively inhibited, and the impact on the power distribution network is relieved.

Description

technical field [0001] The invention belongs to the technical field of flywheel energy storage, in particular to a nonlinear control system and method suitable for DC charging stations. Background technique [0002] With the popularization of electric vehicles (electric vehicles, EVs), electric vehicle fast charging stations (fastcharging stations, FCS) are gradually put into construction and operation in urban core areas. However, the access of high-power, high-current fast charging stations with impact loads will adversely affect the stable operation of the power system. In order to solve the problem of sudden increase in grid power ramp rate and large drop in bus voltage during charging start-up period caused by impact load access, the configuration of energy storage devices in DC fast charging stations to provide high-power charging and discharging services can effectively suppress the impact caused by load impacts. adverse effects. Compared with the traditional contro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/16H02J3/30H02J3/32B60L53/56
CPCH02J1/16H02J3/30H02J3/322B60L53/56H02J2203/20Y02T90/12
Inventor 王迎秋马凤云赵亮徐科张剑张浩祖国强刘洪任博强
Owner ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO