Study of the transients with the loss of field of the synchronous generator in the industrial electric power station

Abstract

One of the main trends of industrial power engineering today is the need to improve the reliability of power supply of responsible consumers along with the increase of competitiveness of products by reducing cost. These requirements are ensured by the widespread introduction of distributed generation sources. These include mini combined heat and power unit, gas turbine, gas engine and combined-cycle gas turbine power plants. At the same time, such changes significantly complicate both the power supply system and possible modes of operation. One of the possible emergency modes in such networks is the loss of field of the synchronous generator. The admissibility of such a regime is specified by regulatory documents. In such a case this generator goes into asynchronous mode and consumes reactive power from the network. The aim of this work is to study the operation of a synchronous generator for a certain time in the asynchronous mode as a result of a loss of field and to develop measures to ensure the admissibility of such a mode in a complex looped network. An algorithm has been developed for calculating the electromechanical transients of a synchronous generator, taking into account the loss of machine field. Studies are carried out for various operational modes of an industrial power plant, taking into account the initial load of the generator using the KATRAN software package. The calculation results allow determining the generator load with active power, at which the synchronous generator can operate in the asynchronous mode without excitation.

Specifics of Gradual Transition to Post-Emergency Parameters for Static Stability Testing of Distributed Generation Facilities

“…Данный алгоритм использует сочетание метода последовательного эквивалентирования для расчета установившихся режимов параллельной и раздельной работы и метода последовательного утяжеления непосредственно для анализа статической устойчивости [11,[20][21][22][23]. Математическому моделированию синхронных генераторов посвящено достаточное число работ [24][25][26][27][28]. В алгоритме для расчета установившихся режимов использована традиционная математическая модель синхронной машины, представляющая синхронный генератор как ЭДС по поперечной оси за углом ротора δ.…”

Static Sustainability Analysis of Generators at Industrial Power Plants Operating Separately from the Energy System

“…Математическому моделированию элементов электроэнергетических систем посвящено большое количество работ [18][19][20][21][22][23]. Для анализа подобных режимов были разработаны соответствующие математические модели синхронных генераторов, учитывающие характеристики автоматических регуляторов с необходимой степенью точности.…”