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Fuzzy model-free adaptive control method for low-voltage treatment device

A model-free self-adaptation and control method technology, applied in the direction of AC network voltage adjustment, etc., can solve the problems of large steady-state error, grid disturbance and poor adaptability to load changes, etc., and achieve short response time, strong adaptability, and good robustness The effect of sex and load adaptability

Active Publication Date: 2019-02-26
GUIZHOU POWER GRID CO LTD
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Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a fuzzy model-free adaptive control method for low-voltage control equipment to solve the problem of large steady-state errors in the control system of traditional low-voltage control equipment and poor adaptability to grid disturbances and load changes The problem

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  • Fuzzy model-free adaptive control method for low-voltage treatment device
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  • Fuzzy model-free adaptive control method for low-voltage treatment device

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Embodiment Construction

[0023] The implementation of the method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] A fuzzy model-free adaptive control method for low-voltage control equipment, comprising the following steps:

[0025] Step 1: Set up the topology structure: the topology structure of low-voltage equipment consists of a rectifier side and an inverter side; the rectifier side adopts a half-bridge uncontrolled rectification structure; the inverter side uses a half-bridge inverter composed of two IGBTs, and simultaneously passes LC Filtering, connected to the power grid in series;

[0026] Step 2: Connect the rectifier stages of the topological structure to the power grid in parallel for rectification to obtain the DC bus support voltage U dc ;

[0027] Step 3: Set the target voltage, the inverter stage samples the difference between the grid voltage and the target voltage, and obtains the given U of the inverter stage contro...

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Abstract

The invention discloses a fuzzy model-free adaptive control method for a low-voltage treatment device. In view of the problem that the control system of a conventional low-voltage treatment device hasa large steady-state error and is poor in adaptability to power grid disturbance and load changes, a fuzzy model-free adaptive controller is used for controlling a series-side inverter. In combination with the good adaptability of model-free adaptive control and fuzzy control, the device has good robustness and load adaptability, and very short response time.

Description

technical field [0001] The invention belongs to the field of electric power electronic control, and relates to a fuzzy model-free self-adaptive control method of low-voltage control equipment. Background technique [0002] With the development of the economy, regardless of the urban distribution network or the rural distribution network, the complexity of the load is constantly changing. The use of household appliances such as induction cookers, refrigerators, and air conditioners, and some rural distribution networks also have small family workshops such as cutting machines, electric welding machines, The use of equipment such as ovens. On the one hand, the load capacity of urban distribution network or rural distribution network is constantly changing, and on the other hand, the load complexity is increasing. In many distribution network areas, the problem of low voltage of the grid voltage occurs at the time point when the load is relatively concentrated. The general met...

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Application Information

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IPC IPC(8): H02J3/12
CPCH02J3/12
Inventor 欧家祥张俊玮黄宇丁超黄仁金王蓝苓王扬胡厚鹏李航峰
Owner GUIZHOU POWER GRID CO LTD