# Electrical Device Protection from Overvoltage in a DC Power Supply Network: Fast-acting Protection, Realized by an “Artificial” Short Circuit in the Input of the Protected Device

## Authors

• S. K. Filipova-Petrakieva Department of Theory of Electrical Engineering, Technical University of Sofia, Bulgaria
• Y. M. Shopov Department of Electrical Apparatus, Technical University of Sofia, Bulgaria
Volume: 10 | Issue: 1 | Pages: 5314-5319 | February 2020 | https://doi.org/10.48084/etasr.3316

## Abstract

In the present paper a protective device based on the so-called “artificial” short circuit in the input of the network, is proposed. To ensure the necessary time for switching on the protection, the increased power supply voltage is delayed to reach in the input of the protected device by additional inductance L, which is connected in series to the power supply. As a result of this forced short circuit, the DC-power supply is switched off by a standard protective circuit-breaker. The short circuit is realized by a fast-acting semi-conductor device (e.g. diac + thyristor, etc.). The controlling signal is formed as a voltage across a capacitor that is a part of RC-circuits connected in parallel to the DC-power supply network. An analytical expression for this voltage, using a classical method for transient analysis, is obtained. The main aim is to determine the exact time of switching on the protection. The research is confirmed with simulations by OrCAD PSpice under the exact values of the elements in the RC-circuits considered. Two rapid increase cases in the power supply voltage are considered: positive jump and linear increase. The suggested solution is applicable for overvoltage protection of different electrical devices. The electrical scheme, based on the electronic components, ensures a fast-acting breaking, which guarantees secure protection. Based on the analytical expressions, the synthesis of the circuit for control and protection is made and the respective values of its elements are calculated.

## Keywords:

electrical engineering, electronics, overvoltages, short circuit’s protection by electronic unit, transients analysis by classical method

## References

M. H. Rashid, Power electronics handbook, 4th edition, pp. 27-54, Elsevier, 2018

H. V. Nguyen, H. Nguyen, M. T. Cao, K. Hung Le, “Performance comparison between PSO and GA in improving dynamic voltage stability in ANFIS controllers for STATC”, Engineering, Technology & Applied Science Research, Vol. 9, No. 6, pp. 4863-4869, 2019 DOI: https://doi.org/10.48084/etasr.3032

D. N. Truong, V. T. Bui, “Hybrid PSO-optimized ANFIS-based model to improve dynamic voltage stability”, Engineering, Technology & Applied Science Research, Vol. 9, No. 4, pp. 4384-4388, 2019 DOI: https://doi.org/10.48084/etasr.2833

D. D. Tung, N. M. Khoa, “An Arduino-based system for monitoring and protecting overvoltage and undervoltage”, Engineering, Technology & Applied Science Research, Vol. 9, No. 3, pp. 4255-4260, 2019 DOI: https://doi.org/10.48084/etasr.2832

On Semiconductor, NCP346, Overvoltage protection IC, Semiconductor Components Industries LLC, available at: https://www.onsemi.com/pub/Collateral/NCP346-D.PDF

W. Jung, W. Kester, J. Bryant, J. Buxton,W. Freeman, “Overvoltage protection – Section 9.4”, in: Data conversion handbook, pp. 793-822, Newnes, 2005 DOI: https://doi.org/10.1016/B978-075067841-4/50044-0

M. Mintchev, Electric arc breaking with contactless elements in electrical devices for low voltage, MSc Thesis, Sofia, Bulgaria, 1987 (in Bulgarian)

M. Mintchev, P. Penchev, Contactless apparatus, Technica, 1976 (in Bulgarian)

M. Mintchev, N. Trifonov, Manual for contactless apparatus design, Technica, 1987 (in Bulgarian)

L. R. Neuman, K. S. Demirchian, Basic of theoretical electrical engineering: Linear electric circuits’ theory, Vol. 1, No. 2, Energy, 1976 (in Russian)

G. Cherneva, P. Ivanov, “Approaches for modeling electronic schemes with key elements”, Меchanics Transport Communications, Vol. 16, No. 3, Article ID 1710, pp. VII-60-VII-66, 2018 (in Bulgarian)

K. Milanov, H.. Antchev, “Fast-acting protection of a semiconductor converter by means of short-circuiting thyristor”, 10th Electrical Engineering Faculty Conference, Santa Marina, Sozopol, Bulgaria, September 11-14, 2018 DOI: https://doi.org/10.1109/BULEF.2018.8646942

## How to Cite

[1]
S. K. Filipova-Petrakieva and Y. M. Shopov, “Electrical Device Protection from Overvoltage in a DC Power Supply Network: Fast-acting Protection, Realized by an ‘Artificial’ Short Circuit in the Input of the Protected Device”, Eng. Technol. Appl. Sci. Res., vol. 10, no. 1, pp. 5314–5319, Feb. 2020.

### Metrics

Abstract Views: 459