Abstract
The article describes the diesel generator complex which consists of two diesel generators. In order to save fuel, it is advisable to choose one diesel generator of inverter type, i.e. to switch it to a variable speed mode. The buffer storage device is used as a part of the power plant in order to ensure the required parameters of the generated electricity under peak loads, as well as when the generator is operating at the limit of rated power. There has been given the control algorithm and transient processes of the charge / discharge of the buffer storage device in a diesel generator power plant. The power plant that consists of a classic diesel generator and a variable speed diesel generator unit (valved generator) has been chosen as an object research. A block diagram of the power plant conducting is proposed, as well as a power transformer topology of a variable-speed diesel generator based on a step-down pulse-width converter. There has been presented an algorithm for controlling the connection of a buffer storage device depending on its charge and the load power value both in stand-alone mode and in parallel operation of generator sets. In the MatLab Simulink computer environment a simulation model of a power plant was developed and transient processes of load switching, as well as charge / discharge of a buffer energy storage device were studied. An electrical circuit diagram of an experimental bench of a variable-speed diesel generator set is illustrated. The results of experimental studies of dynamic modes of operation on a prototype variable speed diesel generator with a power of 3.2 kW are also presented.
Highlights
The buffer storage device is used as a part of the power plant in order to ensure the required parameters of the generated electricity under peak loads, as well as when the generator is operating at the limit of rated power
The power plant that consists of a classic diesel generator and a variable speed diesel generator unit has been chosen as an object research
A block diagram of the power plant conducting is proposed, as well as a power transformer topology of a variablespeed diesel generator based on a step-down pulse-width converter
Summary
Волжский государственный университет водного транспорта, Нижний Новгород, Российская Федерация. Представлен алгоритм управления подключением буферного накопителя энергии в зависимости от его заряда и величины мощности нагрузки как для автономного режима, так и для режима параллельной работы генераторных агрегатов. Е. Электростанция на базе дизель-генераторной установки переменной частоты вращения и буферного накопителя энергии // Вестник Астраханского государственного технического университета. В состав автономной дизельной электростанции, как правило, входит не менее двух дизель-генераторных установок (ДГУ), что повышает как энергоэффективность ее работы в режимах долевых нагрузок, так и надежность. С учетом сказанного для обеспечения надежной работы электростанции в режимах малых нагрузок установленную мощность БНЭ следует выбирать на величину не менее 25 % от номинальной мощности дизеля. Алгоритм коммутации (подключение или отключения) силового электрооборудования, а также состояние силовых контактов К1, К2 и К3 в режимах автономной и параллельной работы генераторных установок с учетом мощности нагрузки представлен на рис.
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