Charge and discharge test system based on predictive load feedforward control and control method

A charge-discharge test and feed-forward control technology, applied in control/regulation systems, collectors, electric vehicles, etc., can solve the problems of PWM rectifier DC bus voltage fluctuations, hysteresis, hazards, etc., to improve voltage stability and speed up regulation Speed, improve the effect of load disturbance resistance

Pending Publication Date: 2021-07-09
千黎(苏州)电源科技有限公司
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Problems solved by technology

[0003] During the charging and discharging test of the power battery, due to frequent charging and discharging, the output power of the PWM rectifier will change, resulting in large fluctuations in the DC bus voltage.
If the DC bus voltage fluctuates greatly for a long time, it will not only reduce the control performance of the front-stage PWM rectifier, but also cause harm to the DC / DC side.
At the same time, because the double-loop control strategy based on the traditional PI controller will have a certain lag in the output, it is impossible to achieve a fast dynamic response of the system

Method used

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  • Charge and discharge test system based on predictive load feedforward control and control method
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  • Charge and discharge test system based on predictive load feedforward control and control method

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Embodiment Construction

[0055] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0056] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses a charge and discharge test system based on predictive load feedforward control and a control method, the test system comprises a PWM rectifier, a bidirectional DC / DC converter and a regulation device, the input end of the PWM rectifier is connected with an external three-phase alternating current, the output end of the PWM rectifier is electrically connected with the input end of the bidirectional DC / DC converter, and the output end of the bidirectional DC / DC converter is electrically connected with the regulation device. The output end of the bidirectional DC / DC converter is electrically connected with a load, and the regulation and control device can calculate the power required by the load at the next moment according to the charging and discharging state of the load at the current moment and control the input power of the PWM rectifier. According to the charge and discharge test system based on predictive load feedforward control and the control method provided by the invention, the influence caused by DC bus voltage fluctuation and control delay when the load power is changed is solved, and additional hardware cost and wiring are not required to be increased.

Description

technical field [0001] The invention relates to the technical field of power battery charge and discharge control, in particular to a charge and discharge test system and control method based on predictive load feedforward control. Background technique [0002] The power battery charging and discharging equipment detects the performance of the battery through the charging and discharging test of the battery. Usually, the power battery charging and discharging equipment adopts a bipolar topology. The front-stage circuit mainly realizes the conversion between AC and DC. When charging, the energy is transmitted from the power grid to the back-stage, and when discharging, the energy is fed back to the power grid. On the one hand, the pre-stage circuit needs to realize the connection between the power grid and the post-stage circuit, and on the other hand, it must provide a reliable and stable DC voltage for the post-stage circuit. , phase-controlled rectifiers to today's PWM re...

Claims

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Application Information

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IPC IPC(8): H02J7/02H02M7/217H02M3/158H02M1/088
CPCH02J7/02H02M1/088H02M3/1582H02M7/217H02J2207/20
Inventor 韩金刚连锦波储秀红
Owner 千黎(苏州)电源科技有限公司
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