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Real-time constant-power control method for diesel electric locomotive

A technology of constant power control and diesel locomotive, applied in the direction of controlling generators through magnetic field changes, can solve the problems of complex excitation system, speed drop, speed fluctuation, etc., to achieve the effect of precise control and improved speed regulation performance

Inactive Publication Date: 2011-09-14
CRRC DALIAN CO LTD
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. When the locomotive is loaded, the excitation current has no rate of increase control, and the locomotive does not start smoothly;
[0005] 2. The resistance of the oil motor is connected in series with the excitation winding of the tachogenerator TG. As the initial control link of the locomotive excitation system, the power is amplified through the TG and the exciter EXC, and finally the excitation of the main generator MG is controlled. The excitation system is complex
[0007] 1. The resistance of the oil motor is connected in parallel with the switching tube of the microcomputer excitation, and then connected in series in the excitation winding of the tachogenerator TG, as the initial control link of the locomotive excitation system, the power is amplified by TG and the exciter EXC, and finally controls the main power generation The excitation of machine MG, the excitation system is complex;
[0008] 2. Once the tachometer generator fails, the locomotive can only work by faulty excitation, which is easy to cause damage
At this time, the power generated by the diesel engine will not reach the specified value. If the output power of the main generator is still at the normal value of the diesel engine, it will inevitably overload the diesel engine or make the diesel engine unable to bear the burden, causing the speed to drop or fluctuate, and there will be a trip If the output power of the diesel engine is not corrected, the fuel consumption of the diesel engine will increase, the performance will decrease, and even the diesel engine will fail.

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  • Real-time constant-power control method for diesel electric locomotive
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Embodiment Construction

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] see figure 2 , the real-time constant power control device for an electric drive diesel locomotive of the present embodiment includes a combined regulator, an oil motor resistance, a diesel engine speed and a main and auxiliary generator voltage and current detection circuit, an excitation control circuit, an oil motor resistance detection...

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Abstract

The invention provides a real-time constant-power control method for a diesel electric locomotive, and the method comprises the following steps: firstly setting corresponding relation between the speed and output power of a diesel engine and the standard value of the oil motor resistance; then detecting real-time values of the diesel engine speed, the output voltages and currents of main and auxiliary generators and the oil motor resistance, calculating real-time values of the output powers of the main and auxiliary generators and the diesel engine, determining the real-time standard value ofthe oil motor resistance, comparing the real-time value of the oil motor resistance with the real-time standard value, and correcting the output power set value of the current main generator. According to the invention, the startup and speed regulation performances of the locomotive can be greatly improved and the control can be more accurate, thus avoiding the speed reduction or speed oscillation and haunting caused by overload or abrupt load change of the diesel engine.

Description

technical field [0001] The invention relates to a control technology of a diesel locomotive, in particular to a real-time constant power control method for an electric drive diesel locomotive. Background technique [0002] In the past, electric transmission diesel locomotives used speed-power joint regulators to realize the speed regulation and power regulation of diesel engines under various operating conditions by adjusting the amount of fuel injection. A variable power adjustment resistor is installed on the oil motor of the joint regulator, which is called the oil motor resistance (the resistance value varies between 0 and 500Ω). The brush of the oil motor resistance is fixed on the output shaft of the oil motor. The joint regulator controls the rotation angle of the output shaft of the oil motor by changing the position of the plunger of the power adjustment slide valve, and at the same time controls the resistance value of the oil motor resistance. Use the resistance...

Claims

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Application Information

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IPC IPC(8): H02P9/14
Inventor 张思庆蔡志伟高洪光张晓宝
Owner CRRC DALIAN CO LTD
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