Excitation control system valve-inductor generator as composition of a diesel generator set with variable rotational frequency

The paper discusses a new solution for organizing locally isolated energy systems - сreating generators that adapt to changing conditions in terms of load and energy source. It is noted that an important link of the system under consideration is a valve-inductor generator, which has the ability to provide stable values of rectified voltage and efficiency, while changing the values of power, torque and speed of the generator in a wide range. Technical solutions of generator excitation unit operation providing power output to the isolated network at variable speed are analyzed. Justification of the choice of the generator excitation unit circuit and development of the circuit diagram for controlling the excitation of a valve-inductor generator are carried out. Different modes of operation of the generator excitation unit are described and modeled from the moment of start-up to the nominal speed of the internal combustion engine. It is concluded that the developed generator excitation unit meets all the necessary requirements and is suitable for use in a variable speed diesel generator set with a valve-inductor generator.