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[IEEE 2018 IEEE Industry Applications Society Annual Meeting (IAS) - Portland, OR, USA (2018.9.23-2018.9.27)] 2018 IEEE Industry Applications Society Annual Meeting (IAS) - A Solar PV, BES, Grid and DG Set Based Hybrid Charging Station for Uninterruptible Charging at Minimized Charging Cost
摘要： In this paper, a charging station (CS) is proposed that uses a solar photovoltaic (PV) array, a battery energy storage system (BES), the grid and a diesel generator (DG) set to provide uninterruptible charging of electric vehicles (EVs). However, these energy sources are utilized in a way that minimizes the operational cost of the CS. Therefore, it reduces the charging cost of the electric vehicles (EVs). To achieve uninterruptible charging and to minimize the charging cost, a charging strategy is proposed that prioritizes the use of energy sources. Based on this, the solar PV and BES energy are used as a priority. After that, the grid is used, and finally, a DG set is used when all energy sources are not accessible. This strategy is based on the cost of electricity per kWh. Normally, the rooftop solar PV array offers power at INR 4.5-5/kWh. The grid offers power at INR 10/kWh, and DG set offers at INR 17-20/kWh. To further minimize the charging cost, the single phase two winding self-excited induction generator (SEIG) based DG set is operated at the single point of saturation characteristic to generate much high power than its rated power. Moreover, a single two-leg voltage source converter (VSC) does multiple tasks such as, 1) generation of sinusoidal voltage in standalone mode, 2) regulation of generator voltage and frequency, 3) management of power flow, 4) reactive power compensation and harmonics current elimination and it also reduces the initial cost of the CS. To obtain ceaseless charging while connecting the grid/DG set to the CS, the point of common coupling (PCC) voltage is synchronized with the grid/DG set voltage. The CS provides both AC and DC output ports for charging the EVs. To charge the EVs on AC port, the CS uses solar PV array and BES energy to generate a sinusoidal voltage of 220V and 50Hz. Moreover, with both grid and DG, the CS draws power at unity power factor (PF) with current total harmonics distortion (THD) less than 5% as required by an IEEE 519 standard.
关键词： Solar PV Generation,EV Charging Station,Power Quality,Uninterruptible Power,DG Set
更新于2025-09-23 15:23:52
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An Integration of Solar Photovoltaic Generation to Three-Phase Utility Using Adaptive Control Algorithm
摘要： This paper deals with the modified weighted least-mean square (LMS) control strategy for single-stage, solar photovoltaic (PV) grid-integrated system to enhance the power quality at common coupling point. This control algorithm has fast convergence, fewer oscillations, fast dynamic response, and good steady-state performance than the other LMS-based control algorithm. The incremental conductance-based maximum power point tracking technique is used to obtain the crest power from the PV array, which is used to sustain DC link voltage by proportional–integral controller. The fundamental component of load current is extracted using this proposed control technique to estimate the reference currents of grid. This proposed control algorithm addresses various power quality concerns such as harmonics reduction, power factor correction, and load unbalancing. The VSC of PV array-interfaced grid system feeds real power to the loads, and surfeit real power is injected into the distribution network. The dynamic performance of proposed single-stage PV-fed three-phase system is validated into the MATLAB\Simulink environment at nonlinear loads, and simulated results are validated with test results on an experimental prototype at different environmental conditions such as varying solar irradiation and load unbalancing. Test results are found satisfactory, and total harmonic distortions of grid currents are observed well within limits of the IEEE-519 standard.
关键词： LMS,Voltage source converter (VSC),Power quality,Distributed grid,Solar PV generation
更新于2025-09-23 15:21:01
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[IEEE 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Portland, OR, USA (2018.9.23-2018.9.27)] 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Energy Management Strategy of Solar PV-Battery and Diesel Generator Based Electric Vehicle Charging Station
摘要： This paper presents a smart strategy for a charging station in which a single voltage source converter (VSC) does a multiple task such as power management among different energy sources and charging the electric vehicles (EVs), regulation of voltage and frequency of the generator, harmonics current compensation of nonlinear loads. The charging strategy is designed such that it primarily takes power from the solar photovoltaic (PV) array and a storage battery. In absence of these two sources, the charging station wisely takes power from the grid and the squirrel cage induction generator (SEIG) based diesel generator (DG) set. The DG set is operated such that it generates up to 33% more power than it rated capacity without surpassing the rated current in the windings, therefore, the size of the DG is reduced. Moreover, the voltage and frequency of the generator, are regulated at its rated values without a mechanical speed governor.
关键词： Uninterruptible Power,EV Charging Station,Power Quality,DG Set,Solar PV Generation
更新于2025-09-04 15:30:14