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Control method for reconstruction operation of multi-objective optimization multiple chemical industry rectification system

A technology of multi-objective optimization and rectification system, which is applied in the control field of multi-objective optimization and multiplex industrial rectification system reorganization and operation, and achieves the effect of reducing operation loss, reducing operation loss and prolonging equipment life.

Active Publication Date: 2015-07-08
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the research on the control methods for normal operation and dynamic recombination operation of the commonly used multiple chemical industry rectification systems needs to be strengthened urgently.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Equipped with an industrial DC Hall transformer. The industrial DC Hall transformer adopts the HLA-IV Hall current sensor produced by China Shijiazhuang Yinhe Transformer Co., Ltd., and the maximum measurable DC current is 320kA;

[0016] (2), use the industrial DC Hall transformer equipped in step (1) to measure the DC load current of the multi-objective optimized multiple chemical industrial rectifier system to be controlled, and according to the measured DC load of the multi-objective optimized multiple chemical industrial rectifier system to be controlled Current flow, by reducing the parallel unit selection reorganization topology scheme to reorganize the multi-objective optimization multiple chemical industry rectification system to be controlled;

[0017] (3) Search online to find out the phase shift angle of the power supply voltage under different combinations of 6-pulse units. According to the measured DC load current in step (2), combined with the maximu...

Embodiment 2

[0021] (1) Equipped with an industrial DC Hall transformer. The industrial DC Hall transformer adopts the CHB-KA series Hall current sensor produced by Beijing Senshe Electronics Co., Ltd., and the maximum measurable DC current is 300kA;

[0022] Steps (2) to (3) are the same as in Example 1;

[0023] (4) According to the reorganization topology scheme selected in step (3), using the conventional method, the industrial DC Hall transformer is used to detect the DC current of the reorganization topology scheme, and the DC current is fed back to the controller of the rectifier cabinet. Calculate the difference of the given DC current value, and obtain the difference between the DC current amount of the reorganization topology scheme and the current amount of the multi-objective optimized multiple chemical industry rectification system to be controlled. Utilizing the difference obtained, through the calculation of the proportional integral link, the gear position of the on-load t...

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Abstract

The invention discloses a control method for reconstruction operation of a multi-objective optimization multiple chemical industry rectification system. The control method comprises a first step of arranging an industrial direct-current Hall mutual inductor, a second step of measuring direct-current load current, and reconstructing a to-be-controlled multi-objective optimization multiple chemical industry rectification system; a third step of searching power voltage phase-shifting angles on line under 6 different pulse wave unit combinations, and selecting a minimum power voltage phase-shifting angle to serve as a reconstruction topology scheme; a fourth step of increasing or decreasing the number of air coolers or water-cooling power of cooling devices; and a fifth step of adjusting thyristor trigger angles until current of every rectifier bridge is balanced. The method has the advantages that the thyristor trigger angles can be adjusted according to load conditions, and the harmonic content and a reactive current value are greatly reduced; running of the cooling devices and the multi-objective optimization multiple chemical industry rectification system saves energy; the service life of a device can be prolonged, and running loss is reduced.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to a control method for multi-objective optimization and recombination operation of multiple chemical industry rectification systems. Background technique [0002] The rectification system with high-power power electronics as the control device has been widely used in the fields of electrolysis, chemical industry and rail transportation. In view of the fact that the grid-side passive filtering technology is affected by the impedance of the grid-side power supply, and the partial tuning design should be considered to avoid series and parallel resonance with the system, the filtering effect is not ideal and the cost of active filtering is high, so it is difficult to operate at high voltage levels and Insufficient in power field applications, etc., the multiple rectification system has become the best choice in this field due to its excellent harmonic suppres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 宁志毫
Owner STATE GRID HUNAN ELECTRIC POWER