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Method for controlling diesel generating set parallel connection by using computer

A diesel generator set and computer technology, applied in the direction of single-network parallel feeding arrangement, etc., can solve the problems of limited range of control conditions, affecting diesel engines, and inability to guarantee the high speed of parallel machines, so as to improve safety and efficiency and reduce labor intensity. Effect

Inactive Publication Date: 2009-11-04
CRRC DALIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the number of parallel units is large, it will be very difficult to achieve parallel operation
Generally speaking, the past parallel machine method has the following problems: 1. Parallel machine operation can only be performed under certain specific working conditions and specific settings, and the range of control working conditions is limited; 2. The control accuracy is easily affected by changes in environmental factors , the impact on the electrical system is large; 3. The high speed of the parallel machine cannot be guaranteed, and the safety and reliability may vary from person to person; 4. The parallel operation affects the diesel engines that have been working normally. May cause parallel failure

Method used

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  • Method for controlling diesel generating set parallel connection by using computer
  • Method for controlling diesel generating set parallel connection by using computer
  • Method for controlling diesel generating set parallel connection by using computer

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Embodiment Construction

[0016] The principle block diagram of the equipment of the embodiment of the present invention is as attached figure 1 shown. A series of sensor output signals of the target machine and the adjusting machine are connected to the single-chip microcomputer through the signal processing circuit, and the output of the single-chip microcomputer is connected to the actuator controller of the adjusting machine, the electronic governor controller and other actuators. All of these are implemented by using common commercially available devices, and will not be repeated here.

[0017] See attached figure 2 , detailing the control method of this embodiment. Start from box 1 in the flow chart, enter box 2, and set the standard error of the output voltage amplitude, frequency, and phase. Enter frame 3, make the target machine work in a stable state, and collect the actual values ​​of the output voltage amplitude, frequency, and phase of the target machine. After box 3, the program is d...

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Abstract

The invention discloses a method for controlling diesel generating set parallel connection by using a computer, which comprises the following steps: selecting a machine set as a target machine and rendering the target machine set in a stable working condition; using other machine sets as adjusting machines; comparing the absolute values of the actual differences between the magnitude, frequency and phase of the output voltage of the adjusting machines and those of the output voltage of the target machine with standard differences; and accordingly and constantly adjusting the excitation and rotation speed of the adjusting machines, and executing parallel connection when all of the absolute values of the actual differences are smaller than the standard differences. As the parallel connection does not interfere the 'target machine', the method avoids changing the working condition of the target machine, ensures the stable operation of the machine sets and the safety and reliability of a main circuit after the parallel connection, and reduces the labor intensity of operating personnel and potential safety hazards.

Description

technical field [0001] The invention relates to the technical field of diesel generator sets, in particular to a method for paralleling diesel generator sets controlled by a computer. Background technique [0002] In order to realize the parallel operation of at least two diesel generator sets, manual operation is generally used. First, reduce the diesel engine speed of each unit appropriately, and then adjust the output voltage, frequency, and phase of each unit according to the rotation position of the pointer of the full step meter or the light and dark changes of the lights. Therefore, before the generator sets are paralleled, any generator cannot work normally with load. Due to the limitation of human reaction speed, when the switch blade is closed, it is often not the best fit point, or even deviates too far, and it needs to be repeated many times to realize the parallel machine at low speed. In order to realize the on-load operation, it is necessary to increase the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
Inventor 魏春光蔡志伟张德智邰明辉
Owner CRRC DALIAN CO LTD
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