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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 recombination operation of multiple chemical industry rectification systems, to achieve the effects of prolonging equipment life, reducing operating loss, and reducing operating loss

Active Publication Date: 2013-12-18
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., with a maximum measurable DC current of 320kA;

[0016] (2) Use steps (1) The equipped industrial DC Hall transformer measures the DC load current of the multi-objective optimization multi-chemical industrial rectification system to be controlled, and optimizes the DC load of the multi-objective multi-chemical industrial rectification system based on the measured multi-objective optimization The amount of current is reduced by selecting a reorganization topology scheme to reduce the parallel unit to reorganize the to-be-controlled multi-objective optimization multiple industrial rectification system;

[0017] (3) Online search for the power supply voltage phase shift angle under different 6-pulse unit combinations. According to the measured DC load current in step (2), combined with the mult...

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 conventional methods, the industrial DC Hall transformer is used to detect the direct current of the reorganization topology scheme, and this direct current is fed back to the controller of the rectifier cabinet, and the The difference of the given DC current value is calculated, and the difference between the DC current amount of the reorganized topology scheme and the current amount of the multi-objective optimized multiple industrial rectification system to be controlled is obtained. Then use the obtained difference to dynamically adjust the gear position of the on-load tapping transformer through the ...

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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 particularly relates to a control method for multi-objective optimization and reorganization operation of a multiple industrial rectification system. Background technique [0002] The rectifier system with high-power power electronics as the control device has been widely used in the fields of electrolysis, chemical industry and rail transit. In view of the fact that the grid-side passive filtering technology is affected by the impedance of the grid-side power supply, and it is necessary to consider avoiding series-parallel resonance with the system and designing bias tuning, and the filtering effect is not ideal and the cost of active filtering is high. Insufficient applications in power applications, multiple rectifier systems have become the best choice in this field with their excellent harmonic suppression effects. Multiplexing technology through the multiple connection of con...

Claims

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Application Information

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