Novel simple harmonics compensation method for smart charger with constant DC-capacitor voltage control for electric vehicles on single-phase three-wire distribution feeders

This paper proposes a novel and simple control method for the previously proposed smart charger for electric vehicles (EVs) on single-phase three-wire distribution feeders. The proposed method consists of only the constant dc-capacitor control, which is commonly used in active power line conditioners. No detection blocks of harmonic, reactive, and unbalanced-active currents are required. Thus, we propose the simplest algorithm to compensate harmonics, reactive, and unbalanced-active currents with the proposed smart charger on single-phase three-wire distribution feeders. The basic principle of compensation characteristics for harmonic currents is discussed in detail. A computer simulation is implemented to confirm the compensation characteristics for harmonic currents using PSIM software. Simulation results demonstrate that balanced and sinusoidal source currents with a unity power factor are obtained on the secondary side of the pole-mounted distribution transformer during both the battery charging and discharging operations in EVs, compensating harmonic, fundamental reactive, and unbalanced active currents.

[1]  Leon M. Tolbert,et al.  Reactive power operation analysis of a single-phase EV/PHEV bidirectional battery charger , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[2]  Leon M. Tolbert,et al.  Examination of a PHEV bidirectional charger system for V2G reactive power compensation , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[3]  S.M. Silva,et al.  Performance evaluation of PLL algorithms for single-phase grid-connected systems , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[4]  Donald Grahame Holmes,et al.  Stationary frame current regulation of PWM inverters with zero steady-state error , 2003 .

[5]  Dushan Boroyevich,et al.  Future home uninterruptible renewable energy system with vehicle-to-grid technology , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[6]  Toshihiko Tanaka,et al.  Smart Charger for Electric Vehicles With Power-Quality Compensator on Single-Phase Three-Wire Distribution Feeders , 2012, IEEE Transactions on Industry Applications.

[7]  S.M. Silva,et al.  PLL structures for utility connected systems , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[8]  P. T. Krein,et al.  Review of benefits and challenges of vehicle-to-grid technology , 2012, 2012 IEEE Energy Conversion Congress and Exposition (ECCE).

[9]  Donald Grahame Holmes,et al.  Frequency domain analysis of three phase linear current regulators , 1999 .

[10]  J. G. Pinto,et al.  Assessment of a battery charger for Electric Vehicles with reactive power control , 2012, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society.