Improving the technical and economic efficiency of a derivation-type inverter of micro hydro power plant

This article presents a comparative analysis of the technical and economic efficiency of a derivation-type inverter micro hydro power plant with an energy storage system and an auto-ballasted micro hydro power plant. The authors justify the possibility of saving financial resources by reducing the length of the derivationtype micro hydro power plant's pressure pipeline with an energy storage system. To optimally control the generating and transforming equipment of an autonomous power supply system, a control algorithm is proposed based on criteria for limiting the range of hydrogenerator rotational frequencies and ensuring the rational operating mode of the electric energy storage batteries according to the load's power consumption schedule.

The possibility of using the charging current of the electric energy storage battery in combination with traditional resistive ballast to create a braking control moment for the hydrogenerator is justified.

The article considers issues related to regulating the rational generated power of the hydrogenerator by aligning the power consumption schedule using electric energy storage systems, which allows reducing the length of the pressure pipeline and, consequently, capital costs.

Thus, the article represents a comprehensive analysis of the technical and economic efficiency and optimal control of a derivation-type inverter micro hydro power plant with an energy storage system, which can be used in the design and operation of similar power supply systems.

1. Malaya i mikrogidroenergetika [Small-scale energy]. URL: https://www.microhydro.ru/ (accessed: 20.01.2022). (In Russ.).

2. Borkowski D., Wegiel T. Small hydropower plant with integrated turbine-generators working at variable speed // IEEE Transactions on Energy Conversion. 2013. Vol. 28 (2). P. 452–459. DOI: 10.1109/TEC.2013.2247605. (In Engl.).

3. Lukutin B. V., Obukhov S. G., Shandarova E. B. Avtonomnoe elektrosnabzhenie ot mikrogidroelektrostantsiy [Autonomous power supply from micro-hydropower plants]. Tomsk, 2001. 120 p. (In Russ.).

4. Mikrogidroelektrostantsiya moshchnost'yu 10 kW [Microhydro power plant with 10 kW]. URL: https://inset.ru/produkcija/mges-10pr/ (accessed: 22.01.2022). (In Russ.).

5. Metalloprokat, metal i stal' [Rolled metal, metal and steel]. URL: https://metallas.ru (accessed: 20.01.2022). (In Russ.).

6. Obukhov S. G., Plotnikov I. A., Sarsikeev E. Zh. Buffernaya sistema nakopleniya elektroenergii dlya vozobnovlyaemoi energetiki [The buffer system of electric energy storage for renewable energy] // Alternativnaya energetika i ekologiya. Alternative Energy and Ecology. 2012. No. 9 (113). P. 137–141. (In Russ.).

7. Tipovyye sutochnyye grafiki [Typical daily charts]. URL: https://www.online-electric.ru/dbase/graph24.php (accessed: 20. 01.2022). (In Russ.).

8. Proyektirovaniye elektricheskikh mashin [Design of electrical machines] / Ed. by I. P. Kopylova. Moscow: Energiya, 1980. 496 p. (In Russ.).

9. Promyshlennyye istochniki bespereboynogo pitaniya [Industrial uninterruptible power supplies]. URL: https://www.bespereboynik.ru (accessed: 08.03.2022). (In Russ.).

10. Popov M., Maniv O. Simulation of an autonomous power supply system based on lithium-iron-phosphate (LiFePO4) // MATEC Web of Conferences. 2017. Vol. 141. DOI: 10.1051/matecconf/201714101060. (In Engl.).

11. Litiyevyye akkumulyatornyye batarei [Lithium batteries]. URL: https://s-ways.ru/ (accessed: 08.03.2022). (In Russ.).

12. Dybko M. A., Kuchak S. V., Bachurin P. A., Brova- nov S. V., Kharitonov S. A. Load leveling for a diesel generator using an energy storage and instantaneous power theory // 2018 19th International Conference of Young Specialists on Micro/ Nanotechnologies and Electron Devices (EDM). 2018. P. 567– 573. DOI: 10.1109/EDM.2018.8434936. (In Engl.).

13. Hassoun J., Bonaccorso F., Agostini M. [et al.]. An Advanced Lithium-Ion Battery Based on a Graphene Anode and a Lithium Iron Phosphate Cathode // ACS Publications. 2014. Vol. 14. P. 4901–4906. DOI: dx.doi.org/10.1021/nl502429m. (In Engl.).