Abstract
Information is presented on the current situation and prospects for integration of distributed generation (DG) and microgeneration facilities into distribution networks. The features of networks with DG objects are considered. The aspects that create significant difficulties for visual recognition and manual control of network modes are given. The necessity of creating automation systems for control of normal and emergency modes, which has the functions of recognizing the membership of the current mode in various mode areas, is substantiated. Also, the need to adapt algorithms and settings to the circuit-mode conditions is shown. It is shown that this problem should be solved at a fundamentally new scientific and technological level, using modern software and hardware systems that implement specialized control algorithms. The advantages of applying the Wald sequential procedure to recognize the current mode under conditions of decreasing frequency, transients, non-sinusoidality of currents and voltages, leading to large errors in the estimation of their parameters, are presented. It is proved that ensuring guaranteed high-speed performance of automatic control devices of modes is possible due to the introduction of a truncation algorithm for sequential analysis. An example of correct decision-making by a frequency unloading automation device in the “island mode” of operation of a distribution network with DG and microgeneration facilities based on the Wald procedure is given. This occurred in conditions of ambiguous frequency measurements and the presence of distorting factors. The authors’ recommendations on the application of the Wald sequential procedure for the implementation of relay protection and emergency automation devices in modes accompanied by complex transient processes are presented.
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Acknowledgement
The presented research results were obtained with the support of a grant from the President of the Russian Federation for state support of young Russian scientists (MK-3210.2019.8). Agreement No. 075-15-2019-337 of 11.06.2019.
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Pavel, I., Aleksandr, K., Anton, L. (2020). Application of the Wald Sequential Procedure in Automatic Network Control with Distributed Generation. In: Silhavy, R., Silhavy, P., Prokopova, Z. (eds) Software Engineering Perspectives in Intelligent Systems. CoMeSySo 2020. Advances in Intelligent Systems and Computing, vol 1295. Springer, Cham. https://doi.org/10.1007/978-3-030-63319-6_11
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