Abstract
Abstract. One of the main trends of development of electric power today is to increase the proportion of facilities of distributed generation and small-scale power generation in total active power. This complicates the configuration of the electrical network and does not exclude separate output on the power grid work own power source and diverse loads. In this regard, it is important to be able to calculate and analyze the stability of such regimes allowing for the high-voltage distribution networks, distributed sources of generation usually generating not only electricity but also heat, as well as industrial or urban voltage. In such circumstances, during separate operation, it is of great interest to carry out the analysis of static, dynamic, and resynchronization mode and the resulting stability. The research group developed an algorithm for determining the dynamic stability boundaries of industrial generators in output mode to the power grid to separate the work using the method of sequential weighting. Additional load on the bus lines connected to the power grid was used as the weighting parameter. The algorithm was obtained to study the stability of synchronous and asynchronous motors of own needs, taking into account the motor load and the mutual influence of the power source and the load. The resulting algorithms are developed by means of "KATRAN" software calculating steady state and transient modes for analyzing dynamic stability of AC machines for industrial power output to the load on separate operation. The investigations were carried out using the local thermal power with loads in the form of consumer and auxiliary industrial motors as an example. The research group determined the stability regions depending on the power imbalance on the bus lines connected to the power grid for the preset additional load on the auxiliary synchronous generators and motors. The results obtained make it possible to develop measures for improving the dynamic stability in the conditions of separation of industrial facilities from the grid with distributed generation.
Keywords
Transitional regime, industrial synchronous generator, dynamic stability, software, power supply system, rotor angle.
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