Concern of overvoltages on power filters in industrial electrical networks

: pp. 20 - 30
Lviv Polytechnic National University
AGH University of Science and Technology, Department of Energy and Fuels
Lviv Polytechnic National University, Ukraine, Department of Power Engineering and Control Systems,

Harmonic power filters are widely used in industrial electrical grids, which make it possible to improve the voltage quality on the power supply system buses and to increase the load power factors. Selecting the scheme and parameters of the filter-compensation unit is related to the requirements for compensation of the harmonic currents and load reactive power, the characteristics of the power supply configuration and its operating conditions, as well as the indices of transients that may occur during the operational switching. Procedures for selecting power filter parameters and recommendations for use in typical industrial electrical networks are presented in current international standards and many publications in periodical specialized issues. One of the concerns when choosing the power filter parameters is the optimal tuning of individual filters in a scheme consisting of multiple single-tuned filters, which is associated with manufacturing tolerances in the parameters of the used reactors and capacitors. In addition to the indices of the electric grid operation stationary conditions, when designing the filters, it is necessary to take into account the possibility of transient overvoltage and overcurrent, which are specific to the selected power supply system. The analysis of the available information shows, that in engineering practice there are no generally accepted recommendations for considering the impact of the filter parameter tolerances, changing the order of filter tuning, on the level of maximum overvoltages on the filter reactors and capacitors.

The proposed article presents a method for determining the maximum overvoltages on reactors and filter capacitors based on the simulation of operational switching in the selected industrial electrical grid. The study of transients in the power supply system was performed on a model developed using the MATLAB Simulink package. In this study, the impact of the filter tuning degree in a complex filter- compensating unit on the level of maximum overvoltages caused by operational switching is analyzed and comparative characteristics of transient overvoltages in possible filter configurations are provided. It is shown that the use of a "C" type damped filter in the filter-compensation scheme allows for a significant reduction in the level of transient overvoltages on the filter reactors and capacitors, as well as practically eliminates the impact of the filter detuning on the overvoltage level. The approach proposed in the work to determine the maximum overvoltages on filter equipment can be used in designing filter-compensating schemes for power supply systems of various purposes.

  1. IEEE Std 1036TM-1992, IEEE Guide for Application of Shunt Power Capacitors.
  2. IEEE Std 1531™-2020, IEEE Guide for the Application and Specification of Harmonic Filters.
  3. IEEE Std C57.16™­2011, IEEE Standard for Requirements, Terminology, and Test Code for Dry-Type Air- Core Series-Connected Reactors.
  4. IEEE Std 18™-2002. IEEE Standard for Shunt Power Capacitors.
  5. Foqha T., Alsadi S., Omari O. at al.”A new iterative approach for designing passive harmonic filters for variable frequency drives,” Appl. Math. Inf. Sci. 17, No. 3, 2023, pp.453-468. https://doi:10.18576/amis/170307
  6. Melo I.D., Pereira J.L.R., Variz A.M., et al.”Allocation and sizing of single tuned passive filters in three- phase distribution systems for power quality improvement.” Electr. Power Systems Res., 2020, 180, 106128.
  7. Yang N.-C.; Liu S.-W. Multi-Objective TeachingLearning-Based Optimization with Pareto Front for Optimal Design of Passive Power Filters.” Energies, 2021, 14, 6408.
  8. Azab M. Multi-objective design approach of passive filters for single-phase distributed energy grid integration systems using particle swarm optimization. Energy Rep. 2019, 6, pp. 157–172.
  9. Wang S.; Ding X.; Wang J. Multi-objective optimization design of passive filter based on particle swarm optimization. In Proceedings of the Journal of Physics: Conference Series. J. Physics Conf. Ser. 2020, 1549, 032017. https://doi.10.1088/1742-6596/1549/3/032017
  10. Das J. C. Passive FiltersPotentialities and Limitations IEEE Trans. on Industry Applications, vol. 4, No. 1, 2004; pp. 232–241. https://doi.10.1109/TIA.2003.821666.
  11. Beres R. N., Wang X., Liserre M., Blaabjerg F., and Bak C. L., “A review of passive power filters for three- phase grid-connected voltage source converters,” IEEE J. Emerg. Sel. Topics Power Electron., vol. 4, no. 1, pp. 54– 69, Mar. 2016. https://doi. 10.1109/JESTPE.2015.2507203
  12. Varetsky Y., Gajdzica M. The procedure for selecting the ratings of capacitor banks and reactors of the filtering systems // Przegląd Elektrotechniczny, No. 3, 2020. pp. 77-81. https://doi.10.15199/48.2020.03.19
  13. Jannesar M.R., Sedighi A., Savaghebi M., Anvari-Moghaddam A., Guerrero J.M. “Optimal probabilistic planning of passive harmonic filters in distribution networks with high penetration of photovoltaic generation”, Int. J. Electrical Power Energy Syst., vol. 110, 2019, pp. 332–348.
  14. Medora N.K., Kusko A. “Computer-Aided Design and Analysis of Power-Harmonic Filters,” IEEE Trans. on Industry Applications, vol. 36, No. 2, 2000, pp. 604–613. https://doi. S 0093-9994(00)02408-7
  15. Abdelrahman S., Milanović J.V., “Practical approaches to assessment of harmonics along radial distribution feeders,” IEEE Trans. Power Del., vol. 34 (3), 2019, pp.1184–1192.