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Diesel locomotive constant-power control method with voltage-limiting current-limiting protection

A constant power control, diesel locomotive technology, applied in the control/regulation system, controlling generators, instruments, etc. through magnetic field changes, can solve the problems of large impact on the electrical system, affecting the control accuracy, and limited range of control conditions, to ensure The effect of stable work, reduced labor intensity, and improved overall traction performance

Inactive Publication Date: 2011-04-06
CRRC DALIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the past, the constant power control of diesel locomotives usually used analog circuits and open-loop control methods, which not only limited the range of control conditions, but also were easily affected by changes in environmental factors. function, it cannot realize that the diesel engine works completely according to the optimal power curve
The above-mentioned shortcomings have gradually become one of the bottlenecks affecting the safe and reliable operation of diesel locomotives

Method used

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  • Diesel locomotive constant-power control method with voltage-limiting current-limiting protection
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  • Diesel locomotive constant-power control method with voltage-limiting current-limiting protection

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Embodiment 1

[0018] The device connection of the embodiment of the present invention is as follows: figure 2 As shown: there is a 16-bit single-chip microcomputer (Intel87C196), the output signals of the exciter, the main generator, and the rectifier cabinet are connected to the single-chip microcomputer through the signal processing circuit, and the output of the single-chip microcomputer is connected to the exciter.

[0019] The specific control method is carried out according to the flow shown in 1,

[0020] a. Take the value from the exciter to complete the detection of the current diesel engine speed value; detect the current feedback value of the main generator from the output of the main generator, and detect the voltage feedback value from the output of the rectifier cabinet, and pass the obtained detection value through filtering and modeling After being processed by signal processing circuits such as digital conversion, it is input to the single-chip microcomputer, and the singl...

Embodiment 2

[0029] The basic structure and steps are the same as in Example 1. The difference from Example 1 is that after step b, it is judged whether it is necessary to reduce the power limit value, and if necessary, the current limit, pressure limit, and power limit value at the diesel engine speed should be reduced. power limit.

[0030] The control result of the present invention is: in the constant power working condition, and when the voltage and current of the main generator do not reach the limit value, the limited power PI regulator works to control the output power of the diesel engine along the predetermined power curve; , the voltage limiting PI regulator works, the main generator voltage is limited, and will not exceed the voltage limiting curve, and the current and power fluctuate within a certain range; when the current limiting value is reached, the current limiting PI regulator works, and the main generator current is controlled Limit it, it will not exceed the current l...

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Abstract

The invention discloses a method for controlling constant power of an internal combustion locomotive with voltage and current limiting protection. The method of comparing three closed loops of current, voltage and power is adopted to control PI regulation and output; and accurate control is realized through a PWM mode. According to the current working condition, the method can realize automatic selection and undisturbed switching of a PI regulation strategy through an output comparison mode, can realize control of constant voltage limiting and constant current limiting of a main generator andensure the stable operation of a diesel engine and the safety and reliability of a main circuit, thereby improving the whole traction performance and operation reliability of the internal combustion locomotive and simultaneously greatly reducing labor intensity of department control personnel and artificial potential safety hazard.

Description

Technical field: [0001] The invention relates to a power control method and device for a high-power diesel locomotive, in particular to an internal combustion locomotive with pressure-limiting and current-limiting protection that can reduce the labor intensity of drivers and controllers, eliminate artificial safety hazards, and make the locomotive run safely, reliably and efficiently. Locomotive constant power control method. Background technique: [0002] In the past, the constant power control of diesel locomotives usually used analog circuits and open-loop control methods, which not only limited the range of control conditions, but also were easily affected by changes in environmental factors. function, it cannot realize that the diesel engine works completely according to the optimal power curve. The above-mentioned shortcomings have gradually become one of the bottlenecks affecting the safe and reliable operation of diesel locomotives. Invention content: [0003] Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/14G05F1/66
Inventor 蔡志伟韩树明管明华高磊程显伟
Owner CRRC DALIAN CO LTD