Mitigation of photovoltaic power generation fluctuations using plug-in hybrid electric vehicles storage batteries

Summary Voltage fluctuation and voltage rise are common issues associated with the massive integration of photovoltaic (PV) technologies in distribution systems. In this paper, sensitivity‐based and optimization‐based methods are proposed for mitigating voltage fluctuation and rise in the presence of plug‐in hybrid electric vehicles (PHEVs). The concept of these methods is to optimize the reactive power of PV inverter and active power from charging station of PHEVs for matching a target voltage profile. The sensitivity‐based method is based on the first‐order power flow sensitivities around the desired voltage profile. An optimization model is used in optimization‐based to minimize the mismatches between the fluctuating and required voltage profiles. The charging/discharging operation of PHEVs and reactive power of PV inverter are simultaneously controlled for compensating power fluctuation during cloud transients and load fluctuations. The results demonstrate the effectiveness of the proposed methods compared with existing methods.

Section: Resultsmentioning

confidence: 99%

Sensitivity‐based and optimization‐based methods for mitigating voltage fluctuation and rise in the presence ofPVandPHEVs

Ali

Raisz

Mahmoud

2017

“…The advance in power electronic interfaces of DGs allows efficient integration of these resources with many converter topologies and controlling options of both active and reactive power . Consequently, effective controls of the interface power conditioning units could be adopted to mitigate many of the technical impacts associated with intermittent RES generation or controllable load fluctuations . The assessment of these various control topologies over a predefined time span of intermittent load/generation profiles requires extensive simulations for numerous case studies and scenarios that could be a very time‐consuming task.…”

Section: Introductionmentioning

confidence: 99%

Fast quasi-static time-series analysis and reactive power control of unbalanced distribution systems

Selim

Abdel‐Akher

Aly

et al. 2018

Self Cite

Summary The paper develops a method for solving time‐series power flow for unbalanced distribution power systems equipped with on‐load tap changer and photovoltaic (PV) power generation. The proposed PV control is developed using a fuzzy logic controller. When the reactive power of the PV inverter is not enough, tap‐up or tap‐down signals are sent to the on‐load tap changer to control the voltage. The Lagrange function is implemented to predict the initial values of voltage magnitudes and phase angles during the simulation process. These initial values are corrected using power flow routine that adopts the forward/backward analysis method. The IEEE‐123 node test feeder is used to assess the validity of the developed continuous power flow solution. The results are compared with the traditional quasi‐static time‐series solution without prediction scheme. The simulation results prove that the developed time‐series model has superior performance. The effects of PV penetration and voltage regulator on the method performance and tap setting are also investigated.

“…The traditional proportional integral (PI) control is also used for three‐phase inverters to control power, reactive power, and the terminal voltage of the PVG . The integration of PVGs and plug‐in hybrid electric vehicles is proposed to mitigate the power fluctuations of the PVGs . This methodology is developed based on a fuzzy logic control (FLC) that decides the suitable power of each battery to compensate any shortage in PVG power.…”

Section: Introductionmentioning

confidence: 99%

“…8 The integration of PVGs and plug-in hybrid electric vehicles is proposed to mitigate the power fluctuations of the PVGs. 15 This methodology is developed based on a fuzzy logic control (FLC) that decides the suitable power of each battery to compensate any shortage in PVG power. The previous studies were conducted using time domain simulation packages such as MATLAB and PSCAD.…”

Section: Introductionmentioning

confidence: 99%

Voltage control of unbalanced three-phase networks using reactive power capability of distributed single-phase PV generators

Eid

Abdel‐Akher

2017

Self Cite

Summary In this paper, a developed voltage control method for distributed single‐phase photovoltaic (PV) generators in unbalanced distribution networks is proposed. The reactive power capability of the PV inverters has been used to regulate bus voltages during irradiance or load variations. The amount of the reactive power required to optimize phase voltages is calculated using fuzzy logic control function, and hence, the power factor is precisely determined. The proposed control for the PV inverters is based on the dq‐current control to regulate the DC bus voltage and the amount of the reactive power. A hysteresis current control is used as a pulse width modulation gate generator. The proposed control precisely determines the amount of the required reactive power to regulate the system bus voltages to lie within standard limits. The efficiency of the proposed control is evaluated with a 10‐node, 5 kV/phase unbalanced three phase distribution system. The analysis includes different test cases under transient and steady state operations to ensure accurate representation of the actual system. The obtained results assess the quality of the network voltages of the studied system regarding voltage levels and the degree of the unbalance. Moreover, the proposed control is capable of operation under different power factors of the PV inverter.