A Study of Methods of Intensification of Transient Processes in a Diesel-Generator

Manufacturers of diesel-generators strive to meet the high requirements to such transient process indicators as the maximum speed deviation and the duration of the process under load surge. In this paper, two methods of intensifying transient processes are considered: the selection of the proportional-integral-differential coefficients of the control law in the speed regulator and the use of the responsiveness system to improve the air supply of the diesel engine. The object of the study is a diesel-generator based on a D49 diesel engine. To carry out a computational study of transient processes in the GT-Power software package, a computer model of the diesel generator under consideration is compiled. As a result of simulation of the load build-up processes, the values of coefficients of the proportional-integral-differential control law are determined, under which the intensive effect of the speed controller on the fuel supply is provided. To analyze the efficiency of the use of the responsiveness system, the following methods of influencing the air supply in a diesel engine are simulated: the supply of additional energy to the turbocharger rotor, and the supply of additional air to the engine intake manifold and directly to the cylinders. The possibilities of intensification of the transient processes of the diesel-generator for each of the methods considered are shown.

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