The impact of PV inverters on audio frequency injection load control signals
Open accessAbstract
This project investigates the impact of common solar PV inverters on audio frequency injection control (AFIC) signal levels. Anecdotal evidence has been reported by electricity network operators suggesting that solar inverters may be interacting with AFIC signalling. The Australian Power Quality and Reliability Centre (APQRC) employed a range of investigative techniques in order to determine the impact that inverters are having on AFIC signal levels. The process included field measurements on a commercial sized solar installation, measurements conducted within a laboratory environment and computer modelling and analysis to determine the interaction between AFIC signals and PV inverters. The computer simulation and analysis was able to replicate measurements taken in the laboratory and confirmed that the major impact occurring was due to the inverter front-end filter interacting with the high frequency AFIC signals.
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Another study investigated harmonic PQ impacts on PV inverters with AFIC signalling, highlighting the requirement of filtering the AFIC signal to protect the inverters.
“Another study investigated the harmonic PQ impacts on PV inverters with AFIC signalling, highlighting the requirement of filtering the AFIC signal to protect the inverters [47].”
From Voltage Regulation in Rooftop PV-Rich Distribution Networks: A Review and Detailed Case Study (2026) · cites this paper as [47]
The Introduction and Field Measurements sections (pages not provided) support that the study investigated interactions between PV inverters and AFIC signals, including changes in harmonic voltage levels. The Conclusion attributes those interactions primarily to inverter-filter impedance. The paper does not establish a requirement to filter AFIC signals to protect inverters; its Future Work section says whether the interactions harm equipment remains to be investigated. (LLM, conf=0.90)
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Research works printed but not linked: 2
- P. Vermayen, J. Driesen, and R. Belmans, "Impedance of inverter front-ends at the frequency of ripple control signals," in 19th International Conference of Electricity Distribution, May 21 -24, 2007 2007, Conference Paper, p. 4. [Online]. Available: http://www.cired.net/ publications/cired2007/pdfs/CIRED2007 0515 paper.pdf
- H. Hu, Q. Shi, Z. He, J. He, and S. Gao, "Potential harmonic resonance impacts of PV inverter filters on distribution systems," IEEE Transactions on Sustainable Energy, vol. 6, no. 1, pp. 151-161, 2015.
Cited by
Sorted by citations
Voltage Regulation in Rooftop PV-Rich Distribution Networks: A Review and Detailed Case Study
Rahman, O., Elphick, S., & Robinson, D. A. (2026) · Electronics · doi:10.3390/electronics15051074 · Cited by 3 · see citing works
Self-citation
- Authors
- David, J., Elphick, S., Ciufo, P., & Perera, S.
- Affiliations
- University of Wollongong (AU)
- Venue
- 2018 18th International Conference on Harmonics and Quality of Power (ICHQP)
- Publisher
- IEEE
- Published
- 2018-05
- Pages
- 1-6
- OpenAlex
- W2808513161
- Cited by
- 2
- References
- 0
- Citations by year
- 2026: 1 · 2022: 1
- FWCI
- 0.00
- Type
- conference paper
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- International Conference on Harmonics and Quality of Power (publishedVersion)
- Research Online (University of Wollongong) (submittedVersion)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Power Quality and Harmonics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Electrical Measurement Techniques
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Islanding Detection in Power Systems
- Keywords
- power quality
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