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Control method and device for two-way charging and discharging system

A charge and discharge control and control method technology, applied in the direction of circuit devices, battery circuit devices, collectors, etc., can solve the problem of low discharge efficiency, achieve a wide range of applications, ensure discharge efficiency, and simple control process

Active Publication Date: 2017-05-31
SUZHOU GCLSI SCI & TECH IND APPL RES INST CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a control method and device for a bidirectional charging and discharging system for the problem of low discharge efficiency in the process of discharging the power grid by using a bidirectional charging and discharging system

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  • Control method and device for two-way charging and discharging system
  • Control method and device for two-way charging and discharging system
  • Control method and device for two-way charging and discharging system

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Embodiment Construction

[0055] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0056] In this text, relational terms such as left and right, up and down, front and back, first and second are used merely to distinguish one entity or action from another without necessarily requiring or implying such Any actual such relationship or sequence between entities or actions. The terms "comprising", "comprising" or any other variant are intended to cover a non-exclusive inclusion whereby a process, method, article or apparatus comprising a set of elements includes not only those elements but also other elements not expressly listed elements, or elements inherent in such a process, met...

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Abstract

The invention relates to a control method and device for a two-way charging and discharging system. The method comprises the following steps: obtaining alternating-current average active power and direct-current average active power in the two-way charging and discharging system; calculating integral discharging efficiency of the two-way charging and discharging system according to the alternating-current average active power and the direct-current average active power; obtaining current direct-current bus voltage of the two-way charging and discharging system; regulating a direct-current bus voltage reference value to successively approximate optimal direct-current bus voltage when the integral discharging efficiency is greatest according to the integral discharging efficiency and the current direct-current bus voltage; and regulating integral discharging efficiency until the integral discharging efficiency is maximal according to the regulated direct-current bus voltage reference value and the current direct-current bus voltage. According to the control method and device for the two-way charging and discharging system, the direct-current bus voltage reference value is regulated according to the integral discharging efficiency and the current direct-current bus voltage, so that the integral discharging efficiency is regulated, discharging efficiency of the two-way charging and discharging system is guaranteed, a control process is simple, and scope of application is relatively wide.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a control method and device for a bidirectional charging and discharging system. Background technique [0002] With the intensification of environmental pollution and the emergence of problems such as energy shortages, environmentally friendly electric vehicles have emerged as the times require. At present, most of the applications of electric vehicles are that electric vehicles absorb energy from the grid through the charging system to charge the energy storage battery. For V2G / V2H (Vehicle to Grid / Home, battery energy storage is transmitted to the grid) technology, it is hoped that when the electric vehicle is idle, Feedback of excess energy storage in electric vehicles to the grid will also be one of the important directions for the construction and application of smart grids in the future. Therefore, the two-way charging and discharging system plays an important role in reali...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J7/00B60L11/18
CPCB60L55/00H02J3/32H02J7/0068H02J2007/0067Y02T10/70
Inventor 王文杰陈德荣王海潮冯莹戴飞雄
Owner SUZHOU GCLSI SCI & TECH IND APPL RES INST CO LTD
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