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Control system and control method for improving operation reliability of parallel charging piles

A technology for control systems and charging piles, applied in charging stations, climate sustainability, electric vehicle charging technology, etc., can solve problems such as control structures and control methods without reliability of charging piles, and achieve outstanding substantive features and improved The effect of reliable operation and reliable design principle

Active Publication Date: 2019-12-03
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The control structure and process of the existing parallel charging piles are mostly from the perspective of completing the charging task, and there is no control structure and control method for the reliability of the charging piles. The present invention Provide a control system and control method for improving the operating reliability of parallel charging piles

Method used

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  • Control system and control method for improving operation reliability of parallel charging piles
  • Control system and control method for improving operation reliability of parallel charging piles
  • Control system and control method for improving operation reliability of parallel charging piles

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Embodiment 1

[0071] like figure 1 , 2 As shown, the technical solution of the present invention provides a control system for improving the operating reliability of parallel charging piles, including a multi-power section parallel charging subsystem; a multi-power section parallel charging subsystem includes several charging piles, and each charging pile is equipped with There is a controller, and the adjacent charging piles are connected through a communication device; the AC-DC converter in the charging pile is used to detect the input voltage and current, and the output voltage and current; the AC-DC converter is also used for The active and reactive output is completed according to the active and reactive commands, and its specific implementation method is common knowledge in the industry. The power circuit structure of the AC-DC converter is determined according to the power level of the charging pile, and its power circuit structure is common knowledge in the industry. The communic...

Embodiment 2

[0089] like image 3 As shown, an optimal efficiency-based multi-power section charging method provided by an embodiment of the present invention includes the following steps:

[0090] The controller in the charging pile every t record Record the output voltage and current effective value and the output voltage and current effective value of the AC-DC converter once, and calculate the input active power P M,in , reactive power Q M,in and output active power P M,out . The controller calculates the power loss P M,loss , P M,loss =P M,in -P M,out , round the output power to an integer, and store the power loss in the position corresponding to the output power in the controller, which is equivalent to forming a P M,in ,Q M,in is the independent variable, P loss is a two-dimensional function table of the dependent variable.

[0091] Use the multivariate least squares method to fit the discrete data, and obtain the functional relationship P between the charging pile loss ...

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Abstract

The invention provides a control system and control method for improving operation reliability of parallel charging piles. The control method comprises the following steps that AC-DC convertor inputvoltage and current effect values and output voltage and current effective values are recorded once per preset time threshold value, input active power, input reactive power, output active power and output power loss are calculated, and a two-dimensional function table which takes the input active power and the input reactive power as independent variables and the output power loss as a factor isformed; fitting is conducted on discrete data to obtain the function relationship between the charging pile loss and the input active power and the input reactive power, and an integral reliability control objective function of the charging piles is defined, and an optimization model is formed by the reliability objective function and a constraint equation; and the optimization model is solved toobtain the input active power, the input reactive power and the output power of each charging pile, the working states of the charging piles are judged, and adjusting is conducted according to the states of the charging piles and combining the input active power and the input reactive power so as to guarantee the stability of the junction temperature.

Description

technical field [0001] The invention relates to the technical field of charging pile design, in particular to a control system and a control method for improving the operating reliability of parallel charging piles. Background technique [0002] With the continuous development of electric drive technology and battery energy storage technology, the number of electric vehicles continues to grow. The construction of charging piles plays an important role in promoting the development of electric vehicles. Most of the existing charging piles are designed according to the requirements of small charging loads such as family cars. While meeting the charging power requirements of small charging loads, there will also be a certain amount of space. margin. When a large charging pile is used for a small load charging pile, it cannot meet the demand for charging power, and it takes a lot of time to complete charging. Recently, a patent has proposed a multi-power section parallel chargi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/67B60L53/62
CPCB60L53/67B60L53/62Y02T90/16Y02T10/70Y02T10/7072Y02T90/12
Inventor 段美琪段辉李岩赵信华马帅张泽卉杜洪涛颜廷利赵全富毕胜华李淑云邱金燕刘灵慧黄娇王潇阳
Owner STATE GRID SHANDONG ELECTRIC POWER