Author(s)

Xueqing Wu ¹, Gang Wang ¹

Affiliation(s)

¹ Electrical Engineering, Shenyang Institute of Engineering, Shenyang, Liaoning Province, China

Corresponding Author

Gang Wang

ABSTRACT

With the rapid development of photovoltaic (PV) power generation technology, especially the widespread application of inverter-interfaced distributed generation (IIDG), its impact on distribution networks has become increasingly significant. To fully utilize the positive effects brought by IIDG integration into distribution networks, this paper proposes a method of harmonic differential protection for PV grid-connected loads based on characteristic signal injection. This method achieves effective protection of system load components by adding a characteristic signal injection strategy to the current inner-loop controller of inverters. Through theoretical analysis and simulation verification, the effectiveness of this method under different fault conditions is proven.

KEYWORDS

Distribution network; Characteristic signal injection; Harmonic differential protection; Inverter-interfaced distributed generation (IIDG)

CITE THIS PAPER

Xueqing Wu, Gang Wang, Method of Harmonic Differential Protection for PV Grid-Connected Loads Based on Characteristic Signal Injection. Journal of Electrotechnology, Electrical Engineering and Management (2025) Vol. 8: 55-62. DOI: http://dx.doi.org/10.23977/jeeem.2025.080108.

REFERENCES

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