Methodology for assessing the power of the primary source of the system of autonomous electrical supply with account of the predicted load graphics

When developing new or upgrading existing energy-intensive mobile objects (MO), the main way to ensure the quality parameters of the supply voltage is no worse than in the state grid, overestimation of the primary source (PS) power is 1.5–2 times relative to the maximum power of all electrical energy consumers (EEC) software.

The consequence of the existing approach to determine the power of PS are: overestimation of the mass and dimensions of the autonomous power supply system (APSS) by 30–70 %, which significantly reduces speed characteristics, cross-country performance and battery autonomy of MO, as well as worsen the economics of the APSS; the workload of the PS APSS is not more than 35–55 % of the nominal capacity, which leads to a reduction in their service lives.

Thus, it is impossible to take into account the peculiarities of the actual current consumption of individual EEC and the impact of their joint operation on specific PS APSS, which leads to additional financial costs and an increase in development time, as well as to the risk of failure during the testing of both the APSS and the equipment connected to it.

The proposed approach for estimating the PS power of electric energy in APSS MO allows determining the full power of the EEC in terms of limited information about the EEC taking into account the nature of the load graph, as well as the magnitude and form of current consumption. As a result of analytical calculations according to the above methodology, the PS power can be reduced by 13–45 %, depending on the nature of the load, while maintaining the quality indicators of the supply voltage within acceptable limits.

The considered methods for determining the power of the PS APSS will make it possible to determine the limitations for solving the problem of structural-parametric synthesis of the APSS and the algorithm for determining the power of the PS when developing a new or upgrading the existing APSS MO. This will reduce the weight and size parameters of the APSS, thereby increasing the speed characteristics, maneuverability and software permeability of MO, as well as the autonomous operation time and efficiency of the APSS operation.

1. Ministry of Defense of the Russian Federation, 22 Central Research Testing Institute. The State and Prospects of Development of Power Supply Systems and Means of Secondary Power Supply of Weapons and Military Equipment: Collection of Reports Materials of the Third All-Russian Scientific and Technical Seminar.Moscow, 1996. 149 p. (in Russian).

2. Requirements for unified power supply modules for power supply systems of mobile objects. Scientific-Production Center “Technological Laboratory”, 2015. Available at: http://www.techlab.ru/pub (accessed 13 February 2015).

3. Chumakov S. А., Malashin A. N., Sukhodolov Yu. V. Ensuring the quality of electric energy in the systems of power supply of autonomous objects. Vestnik Voennoi akademii Respubliki Belarus’ [Bulletin of the Military Academy of the Republic of Belarus], 2015, no. 2 (47), pp. 151–160 (in Russian).

4. Balagurov V. A., Galteev F. F., Larionov A. N. Electric Machines with Permanent Magnets. Moscow, Energy Publ., 1964. 480 p. (in Russian).

5. Karkotsky D. V., Malashin A. N. Analysis of methods for optimizing the structure of autonomous power supply systems for weapons and military equipment. Problem statement. Vestnik Voennoi akademii Respubliki Belarus’ [Bulletin of the Military Academy of the Republic of Belarus], 2015, no. 1, pp. 68–76 (in Russian).

6. Zinoviev G. S. Power Electronics. 5th ed. Moscow, Yurait Publ., 2012. 667 p. (in Russian).

7. Malashin A. N. (hands). Development of methods for the analytical determination of the power of the primary source of electrical energy for the power supply system of an autonomous sample of armament: report on research and development work of the Military Academy of the Republic of Belarus. Minsk, 2016. 72 p. (in Russian).

8. Guzhov N. P., Olkhovsky V. Ya., Pavlyuchenko D. A. Power Supply Systems. Novosibirsk, Publishing house of the Novosibirsk State Technical University, 2008. 258 p. (in Russian).

9. Lazarev I. A. Synthesis of the Structure of Power Supply Systems of Aircraft. Moscow, Mashinostroenie Publ., 1976. 256 p. (in Russian).

10. Malashin A. N. (hands).Technical appearance of a promising system of power supply to field and mobile communication centers: report on research and development work of the Military Academy of the Republic of Belarus.Minsk, 2018. 247 p. (in Russian).

11. McGranaghan M. Active filter design and specification for control of harmonics in industrial and commercial facilities.Available at: https://www.dranetz.com/wp-content/uploads/2014/02/active-filterdesign-specs-harmonics.pdf