Time Horizon-Based Model Predictive Volt/VAR Optimization for Smart Grid Enabled CVR in the Presence of Electric Vehicle Charging Loads

Singh, Shailendra; Pamshetti, Vijay Babu; Singh, S. P.

doi:10.1109/tia.2019.2928490

Cited by 68 publications

(29 citation statements)

References 20 publications

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“…It is possible to provide voltage support at the PCC to which the FC is connected, or a proper reactive power management of the EV charging station, which can improve Volt-Var Optimization (VVO) solutions for the distribution network. This might be convenient [35]. Both cases would be motivated by economical reason based on the tariffs applicable by the DSO [12].…”

Section: Reactive Power Controlmentioning

confidence: 99%

Control Strategy for Electric Vehicle Charging Station Power Converters with Active Functions

et al. 2019

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Based on the assumption that vehicles served by petrol stations will be replaced by Electric Vehicles (EV) in the future, EV public charging station facilities, with off-board fast chargers, will be progressively built. The power demand of these installations is expected to cause great impact on the grid, not only in terms of peak power demanded but also in terms of power quality, because most battery chargers behave as non-linear loads. This paper presents the proposal of a novel comprehensive global control strategy for the power electronic converters associated with bidirectional three-phase EV off-board fast chargers. The Charging Station facility Energy Management System (CS-EMS) sends to each individual fast charger the active and reactive power setpoints. Besides, in case the charger has available capacity, it is assigned to compensate a fraction of the harmonic current demanded by other loads at the charging facility. The proposed approach works well under distorted and unbalanced grid voltages. Its implementation results in improvement in the power quality of each fast charger, which contributes to improvement in the power quality at the charging station facility level, which can even provide ancillary services to the distribution network. Simulation tests are conducted, using a 100 kW power electronic converter model, under different load and grid conditions, to validate the effectiveness and the applicability of the proposed control strategy.

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Section: Reactive Power Controlmentioning

confidence: 99%

Control Strategy for Electric Vehicle Charging Station Power Converters with Active Functions

et al. 2019

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“…To integrate these flexible power electronics, Varma and Siavashi (2018) present a novel smart inverter PV-STATCOM which controls PV inverters as a dynamic reactive power compensator. Furthermore, Singh et al (2019) achieve voltage regulation through smart inverters of PVs and EV charging stations in the global as well as local domain. Smart inverters have been well investigated and developed to compensate reactive power (Ustun et al, 2020;Gush et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Zeraati et al (2019) develop a distributed voltage regulation scheme to utilize the reactive power capability of PV inverters. Quirós-Tortós et al (2016) and Singh et al (2019) achieve reactive power control in DNs with the support of EV chargers and PVs. However, the voltage regulation techniques using smart inverters are still under research and need practical implementations.…”

Section: Introductionmentioning

confidence: 99%

Assessment for Voltage Violations considering Reactive Power Compensation Provided by Smart Inverters in Distribution Network

Yin

et al. 2021

Front. Energy Res.

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Due to the high proportion of renewable energies, traditional voltage regulation methods such as on-load tap changers (OLTCs) and switching capacitors (SCs) are currently facing the challenge of providing fast, step-less, and low-cost reactive power to reduce the increasing risks of voltage violations in distribution networks (DNs). To meet such increasing demand for voltage regulation, smart inverters, including photovoltaics (PVs) and electric vehicle (EV) chargers, stand out as a feasible approach for reactive power compensation. This paper aims to assess the voltage violation risks in DNs considering the reactive power response of smart inverters. Firstly, reactive power compensation models of PVs and EV chargers are investigated and voltage deviation indexes of the regulation results are proposed. Moreover, kernel density estimation (KDE) and slice sampling are adopted to provide the PV output and EV charging demand samples. Then, the risk assessment is carried out with a voltage regulation model utilizing OLTCs, SCs, and available smart inverters. Numerical studies demonstrate that the reactive power support from smart inverters can significantly mitigate the voltage violation risks and reduce the switching and cost of OLTCs and capacitors in DNs.

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“…A model predictive control (MPC)‐based VVO/CVR scheme has been developed in Refs. 19,20 considering the intermittent nature of PV generation. The combined impact of smart grid‐enabled CVR with EV/PV on energy savings has been reported 21,22 .…”

Section: Introductionmentioning

confidence: 99%

Substation demand reduction by CVR enabled intelligent PV inverter control functions in distribution systems

Arora

Satsangi²,

Kaur

et al. 2020

Int Trans Electr Energ Syst

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Summary This article proposes a combined scheme to reduce the substation demand with conservation voltage reduction (CVR) alongside intelligent photovoltaic (PV) inverter control functions. CVR maintains the power delivered to the customers in lower service voltage range (120‐114)V by not influencing electric devices' performance at the consumer premises. Since most of the loads are voltage‐dependent at the consumer side, proper voltage control can obtain substantial demand reduction and energy savings. In the proposed work, CVR is applied to both medium‐sized (IEEE‐123 node test feeder) and large‐sized (IEEE‐8500 node test feeder) unbalanced distribution feeders without PV and with intelligent PV inverter. In addition, the transient nature of PV output power is also examined during the movement of the clouds. The smart PV inverter utilizes various control functions (Volt‐VAr, Volt‐VAr [hysteresis], Volt‐Watt, and combi mode) to control the system's active and reactive power. Results reveal that operating CVR with intelligent PV inverter in the hysteresis Volt‐VAr mode helps achieve higher substation demand reduction than with only CVR operation. This combination reduces system losses and contributes to energy savings when better voltage regulation is provided. It also helps in maintaining the reliability and efficiency of the distribution network.

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Time Horizon-Based Model Predictive Volt/VAR Optimization for Smart Grid Enabled CVR in the Presence of Electric Vehicle Charging Loads

Cited by 68 publications

References 20 publications

Control Strategy for Electric Vehicle Charging Station Power Converters with Active Functions

Control Strategy for Electric Vehicle Charging Station Power Converters with Active Functions

Assessment for Voltage Violations considering Reactive Power Compensation Provided by Smart Inverters in Distribution Network

Substation demand reduction by CVR enabled intelligent PV inverter control functions in distribution systems

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