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http://dx.doi.org/10.6113/TKPE.2018.23.2.101

Characteristics of Utility Transformer on Household Single-Phase ESS-PCS According to LC Filter Location  

Kim, Yong-Jung (Dept. of Electrical, Electronic and Control Eng., Kongju National University)
Kim, Hyosung (Div. of Electrical, Electronic and Control Eng., Kongju National University)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.23, no.2, 2018 , pp. 101-105 More about this Journal
Abstract
Shortage of electric power occurs frequently along with increased electric power demand. ESS is a precaution to solve this issue. Household ESS has a capacity of approximately 3 kW/7 kWh. Household ESS batteries are typically designed with nominal voltages between 40 and 50 V. To connect household ESS with a 220 V AC system, low battery voltages in power conditioning system (PCS) should be boosted. To boost low battery voltage and match it with AC grid voltage, the use of a transformer for a commercial frequency can be considered. To attenuate switching harmonics of the household single-phase ESS-PCS, LC filter can be installed in two positions: on the primary side or on the secondary side of a transformer. A method has been used generally in single-phase inverters for the ESS-PCS. In another method, however, the output efficiency of the ESS-PCS may be decreased. Parasitic components of the transformer can affect voltage losses, when the square wave with the switching frequency in the ESS-PCS is passed through the transformer windings. In this work, the characteristics of the transformer according to the position of an LC filter are investigated for household single-phase ESS-PCS.
Keywords
ESS(Energey Storage System); PCS(Single-phase Power Conditioning System); Transformer; LC filter; Voltage transfer ratio;
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Times Cited By KSCI : 1  (Citation Analysis)
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