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Automatic control method used for submerged arc furnace electrode and based on high-precision fuzzy control

A technology of fuzzy control and fuzzy controller, applied in furnace control devices, furnaces, furnace components, etc., can solve problems such as difficulties, exponential increase in control rules, affecting the practical application of fuzzy controllers, and achieve the effect of improving control accuracy.

Inactive Publication Date: 2014-05-21
XI AN JIAOTONG UNIV
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Problems solved by technology

Although increasing the number of language values ​​can effectively improve the accuracy of fuzzy control, it will lead to an exponential increase in control rules, and the process of summarizing control rules from domain expert knowledge will become very difficult, thus increasing the difficulty of fuzzy controller design
In addition, when the system has many input variables, this problem will further affect the practical application of the fuzzy controller

Method used

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  • Automatic control method used for submerged arc furnace electrode and based on high-precision fuzzy control
  • Automatic control method used for submerged arc furnace electrode and based on high-precision fuzzy control
  • Automatic control method used for submerged arc furnace electrode and based on high-precision fuzzy control

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Embodiment Construction

[0044] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0045] As shown in the drawings, a submerged arc furnace of a smelter is taken as an example to give a specific application of the present invention. The model of the submerged arc furnace equipped in the smelter is 25000KVA. Since the submerged arc furnace has three-phase electrodes and the controllers of each phase electrode are the same, the figure is only a diagram of the one-phase controller structure. The working process is as follows: smelting raw materials are filled into the furnace, three-phase electrodes are inserted into the furnace charge, and the arc is excited between the electrodes and high temperature is generated, thereby providing energy for the charge smelting. In order to maintain the temperature in the furnace within the desired range and evenly distribute, the depth of the electrode in the charge must be controlled during the o...

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Abstract

The invention provides an automatic control method used for a submerged arc furnace electrode and based on high-precision fuzzy control. According to electrode current deviation ei, a change rate delta ei of the electrode current deviation, the depth dt of the electrode inserted into burden and a change rate delta dt of the depth of the electrode inserted into the burden, a high-precision fuzzy controller is adopted to adjust the variation mt of the position of the submerged arc furnace electrode, wherein a membership function and a fuzzy control rule of the fuzzy controller are obtained through expertise, and output of the controller is obtained through fuzzy neighbor distance weighted interpolation calculation, so that the control accuracy of the fuzzy controller is improved. The automatic control method used for the submerged arc furnace electrode and based on high-precision fuzzy control provides guarantee for safe and reliable operation of the submerged arc furnace which can operate in a stable manner, so that labor intensity of a worker can be reduced effectively, the maintenance quantity is reduced, the work environment is improved, and better conditions are provided for following harmonic suppression.

Description

Technical field [0001] The invention relates to a submerged arc furnace electrode automatic control method, in particular to a submerged arc furnace electrode automatic control method based on high-precision fuzzy control. Background technique [0002] The submerged arc furnace is widely used in the production process of smelting ferrosilicon and silico-manganese alloy. Its working principle is mainly to form an electric arc by ionizing air to generate high temperature and provide energy for the smelting process in the furnace. In order to ensure the stability, high yield and low consumption of the submerged arc furnace production process, during the smelting process, it is required to control the temperature in the furnace to keep it within a reasonable range and make the temperature distribution in the furnace uniform. The temperature in the furnace depends on the amount of heat provided, that is, the power or the size of the current-voltage product, and the temperature distrib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D19/00
Inventor 曹晖张士良雷万钧张彦斌贾立新
Owner XI AN JIAOTONG UNIV
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