A fast excitation control method for diesel locomotive generator

Abstract

A rapid starting excitation control method for a diesel locomotive generator comprises the following steps of: 1, performing strong excitation for a generator according to the corresponding excitationoutput duty ratio according to a ratio K of a feedback voltage and a target voltage of the generator divided into a plurality of starting excitation phases; 2, when the ratio of the feedback voltageand the target voltage is larger than or equal to a target value, performing closed-loop regulation of the output voltage of the generator until the generator output voltage is quickly established andstable. According to the new scheme of performing time and intensity flexible distribution of the feedback generator voltage at different phases, the generator voltage feedback value is quickly closeto the target value, the strong excitation degree is gradually reduced so as to solve the problem of too slow or overshoot generator starting excitation and allow the starting excitation process to be fast and stable, and the rapid starting excitation control method for a diesel locomotive generator can be applied to different types of generators and has the same application for control of a brushless excitation generator.

Description

technical field [0001] The invention is a fast excitation control method applied to generators of different models and in different initial states. Background technique [0002] In the diesel locomotive, the power source is provided by a diesel generator set, the output of the generator is supplied to the rectification and inverter unit, and the output of the inverter controls the rotation of the motor to drive the locomotive. Generators are generally divided into two types: brushed and brushless. Brushed generators are generally directly excited, and the excitation speed is relatively fast, which is very good for the stable control of the intermediate voltage. Another type of excitation control for brushless generators is amplified internally, which is equivalent to integrating two generators. The required excitation control current is small and the excitation response is relatively slow. [0003] After the diesel locomotive diesel engine is started, when the control batte...

AI Technical Summary

Problems solved by technology

This method is the same as the first method, and you can get a good voltage excitation waveform at certain moments, but as the working conditions change, such as the start-up process after a long shutdown, or cut off and put into the excitation process through the display screen , or even different generators, due to the changes in parameters such as the resistance value of the excitation winding caused by the residual magnetism and temperature changes of the generator, it will appear that the excitation is too slow and the overshoot phenomenon occurs, which is not applicable to the state of all generators

[0007] Therefore, there are problems of slow adjustment and overshoot in the excitation process of generator voltage establishment of different types of generators and generators in different initial states. How to quickly establish and stabilize the auxiliary generator voltage and how to improve the performance of the whole vehicle has become a demand in the industry. unresolved issues

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