A study of voltage distortion caused by variable speed high-efficiency heat pumps

Author

Balda, J.C. ; Olejniczak, K.J. ; Tirumala, R. ; Samotyj, M.J. ; Barbre, B.

Author_Institution

Arkansas Univ., Fayetteville, AR, USA

fYear

1993

fDate

2-8 Oct 1993

Firstpage

1579

Abstract

The influence of a large concentration of variable-speed high-efficiency heat pumps (VSHPs) on the derating of residential single-phase distribution transformers and the quality of electric power is investigated. The harmonic power flow computer program HARMFLO is used to determine the derating of a 50 kVa single-phase distribution transformer supplying the VSHP nonsinusoidal load current. The VSHP is modeled as a fixed-harmonic load whose harmonic spectra were obtained from field measurements. The variations of the voltage total harmonic distortions and the system harmonic I²R losses are evaluated for different VSHP penetration levels throughout the distribution system. An analysis of the results obtained seems to indicate that distribution transformers are moderatley derated by the type of VSHP considered here

Keywords

digital simulation; distribution networks; heat pumps; load flow; losses; power supply quality; power system analysis computing; power system harmonics; power transformers; software packages; variable speed gear; 50 kVA; HARMFLO; I²R losses; computer program; derating; distribution system; field measurements; harmonic power flow; harmonic spectra; nonsinusoidal load current; power supply quality; power systems; residential single-phase distribution transformers; variable speed high-efficiency heat pumps; voltage distortion; Distributed computing; Heat engines; Heat pumps; Power engineering and energy; Power system harmonics; Student members; Systems engineering and theory; Total harmonic distortion; Transformers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE

Conference_Location

Toronto, Ont.

Print_ISBN

0-7803-1462-X

Type

conf

DOI

10.1109/IAS.1993.299241

Filename

299241