Investigation of the Tomsk Region Power System Uniting Options
Abstract
The article analyzes possible means for switching the Tomsk electric power system northern and southern parts for parallel operation. This system has the operational separation over the 220 kV power line, which connects the 500 kV Tomsk substation with the Nizhnevartovsk district power plant. With these parts switched for parallel operation, it will be possible to achieve an enhanced level of operational reliability and more efficient power supply, especially in the course of making routine switching operations without the need to disconnect the consumers. This will also make it possible to secure more flexible and stable operation of the power system and to decrease power losses. In view of these considerations, it is important to analyze the possibility of using various means, with applying the synchronism monitoring function, which implies closing of the circuit breaker by synchronization or waiting for synchronism, or using a more advanced system like a back-to-back HVDC link. To this end, the ranges of voltage vector deviation angles between the united substation buses were determined, as well as limiting switching angles at different substations of this 220 kVpower transmission, at which steady-state and transient stability will not be lost. The article presents the results of modeling the operations for switching the power system parts for parallel operation by means of a back-to-back HVDC link. Simulation of the processes triggered in the considered 220 kV power transmission by a short-circuit fault shows the effectiveness of using this device for solving the stated problem. The requirements for determining the back-to-back HVDC link power capacity are specified, and the optimal places for installing it in the considered power transmission line are defined.
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Rasporyazheniye Gubernatora Tomskoiy oblasti No. 210-р оt 02.10.2017 «Ob utverzhdenii skhemy i programmy razvitiya Tomskoy oblasti...» (Order of Governor of the Tomsk area No. 210-p from 02.10.2022 » About claim of chart and program of development of the Tomsk area on a period 2018—2022» [Electron. resurs] http://docs.cntd.ru/document/467907549 (Data obrashcheniya 06.02.2019]
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