Technical and economic efficiency of the application of lithium-titanate batteries in quarry railway transport

The paper investigates the technical and economic efficiency of using LTO batteries as an onboard energy storage device for the efficient use of electric braking energy. With the help of a simulation model, the distribution of the power of electric braking and the amount of energy generated in one act of braking was obtained. A module has been developed that takes into account the decrease in the effective capacity of the battery depending on the depth of discharge and the number of cycles. Three batteries of LTO cells with an energy capacity of 352, 282, and 235 kWh and a power of 6.66, 5.33, and 4.44 MW, respectively, were studied. It is shown that under the conditions of work with electrical loads, typical for the Kachkanar GOK, the batteries degrade by 7−16%, depending on their initial energy capacity. Under these conditions, the part of braking energy stored by the batteries decreases from 90% at the start of operation to 82% after 5 years of operation. Based on the NPV assessment, the project payback was calculated, it is shown that over 5 years the positive cash flow for batteries 352, 282 and 235 kWh is 3.3, 7 and 8.6 million rubles with a residual capacity of 93, 85 and 83, 5% respectively. Thus, it is possible to state the technical and economic efficiency of using LTO batteries for accumulating braking energy in the conditions of operation of the railway transport of the Kachkanar GOK.

Spiridonov E. A. Technical and economic efficiency of the application of lithiumtitanate batteries in quarry railway transport. MIAB. Mining Inf. Anal. Bull. 2023;(10-1):214—228. [In Russ]. DOI: 10.25018/0236_1493_2023_101_0_214.

Spiridonov E. A.¹, Cand. Sci. (Eng.), Associate Professor, Department of Electrotechnical Complexes, NSTU, ORCID: 0000-0002-7229-0954, e-mail: spiridonov@corp.nstu.ru, Novosibirsk State Technical University, Russia, 630073, Novosibirsk, Karl Marx Avenue, 20.

Spiridonov E. A., spiridonov@corp.nstu.ru.

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