## 5 Discussion  
The need to find ways to compensate the leading reactive power provided by LED light devices has arisen due to the problems created by these light devices being connected to the conventional type of power distribution lines. These problems are due to the overcompensation of reactive power when LED lighting devices and capacitor-based compensating devices interact. Consumers pay fines to electricity supply companies for this overcompensation. Therefore, ways have been sought to compensate this reactive power with the available means and with the least possible investment. One of the easily accessible means is a large number of VFDs connected to the same power distribution lines as LEDs. In this study, it has been shown mathematically and experimentally that most diode rectifier supply-side devices, including conventional AC-DC-AC VFDs, provide leading reactive power. It has also been shown mathematically and experimentally that by varying the capacitance of DC circuit capacitors, the value and type of reactive power can be varied--transfer from leading reactive power to lagging. In this way, these conventional VFDs acquire the ability not only to perform their main functions--motor powering and speed control, but also to perform the functions of a reactive power compensator. In this study, it has been mathematically shown that the ability of a VFD to consume reactive power is related to the interaction between the capacitance of the VFD DC circuit  
Figure 19: The power at the point of SIMOVERT P 6 SE21 VFD and five different type of LED lighting devices connection to PDL at a function of induction motor frequency in case of different DC circuit capacitance value: (**a**) reactive power; (**b**) active power. and the internal inductance of the power distribution lines, or to the inductance of the additional choke. As a result of this interaction, the VFD consumes many times more reactive power compared to the reactivity of the inductance of the power distribution lines or the inductance of the auxiliary choke. The experiment connecting a group of LED light devices and conventional VFD with additional DC circuit capacitors to the same power distribution line showed that such VFD can compensate the reactive power provided by LEDs. Despite the advantages listed, this method of reactive power compensation has a number of practical limitations. The control of power factor is not continuous but gradual. The method requires access to the intermediate DC circuit of the VFD. Not all VFD manufacturers allow it, especially during the warranty period. Despite the relatively high power of LED loads, only single-phase power distribution lines and single-phase supply side VFDs are considered in this study. This is due to the fact that most of the VFDs installed in the observed sports arena are single-phase. They are used to power and control the motors of pumps, fans and other engineering equipment. Therefore, a single-phase supply VFD is investigated in this study. The application of three-phase VFD to reactive power compensation is planned in further studies. The aim of this study is to show a possible way to compensate the reactive power of LEDs. Therefore, in these experiments, additional capacitors in the VFD DC circuit were connected manually using circuit breakers. Using such compensation in practice, an additional unit with capacitors, their switching electronic switches and a controller should be constructed. It will be the subject of future work. Conceptualization, G.S. ; methodology, G.S. ; software, G.P. ; validation, G.S. and G.P. ; formal analysis, G.S. ; investigation, G.P. and G.S. ; resources, G.P. and G.S. ; writing--original draft preparation, G.P. ; writing--review and editing, G.S. ; visualization, G.P. ; funding acquisition, G.P. All authors have read and agreed to the published version of the manuscript. This research was supported by the Lithuanian Agency for Science, Innovation and Technology [grant number MITA-T-851-01-0032]. Not applicable. The authors declare no conflict of interest.