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

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...

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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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