Voltage-Sensitivity-Based Volt-VAR-Watt Settings of Smart Inverters for Mitigating Voltage Rise in Distribution Systems

Yoshizawa, Shinya; Yanagiya, Yu; Ishii, Hideo; Hayashi, Yasuhiro; Matsuura, Takahiro; Hamada, Hiromu; Mori, Kenjiro

doi:10.1109/oajpe.2021.3125013

Cited by 20 publications

(4 citation statements)

References 25 publications

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“…A method to determine the volt-var curve based on the relationship between the optimum reactive power and the inverter voltage using the interior point method has been proposed [27]. A method of setting the volt-var curve using the voltage sensitivity matrix of the power system without using an optimization method has been proposed, and was proven to be as effective as the volt-var curve obtained using the optimization method [28]. Although the number of tap operations of transformers by on-load tap changer (LTC) control can be reduced depending on the setting of the volt-var curve [29], very little study is currently available in the published literature on the coordination of volt-var control with other voltage control devices, such as transformers.…”

Section: Motivation and Contributionmentioning

confidence: 99%

Appropriate Volt–Var Curve Settings for PV Inverters Based on Distribution Network Characteristics Using Match Rate of Operating Point

et al. 2022

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This paper describes the process of setting up an appropriate volt–var curve for the reactive power control of a photovoltaic (PV) inverter interconnected to a distribution line that is voltage controlled by a load ratio control transformer (LRT). Computer simulations with 360 patterns of volt–var curves applied to five actual distribution line models are presented. The number of patterns was narrowed down to 23 by using voltage, distribution-line loss, number of LRT tap operations, and a new evaluation index, the match ratio. When a power-factor constraint is imposed on the PV inverter, it may not output the reactive power according to the volt–var curve depending on the active power output. The match rate is an index to show the percentage of the operating points of the PV inverter that conform with the volt–var curve. By evaluating the match rate, it can be demonstrated if the PV inverter efficiently contributes to the voltage control, which greatly contributes to narrowing of the volt–var curve. It is demonstrated that the volt–var curve obtained using the proposed method is superior in terms of voltage controllability, distribution line losses, and the number of LRT tap controls.

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Section: Motivation and Contributionmentioning

confidence: 99%

Appropriate Volt–Var Curve Settings for PV Inverters Based on Distribution Network Characteristics Using Match Rate of Operating Point

et al. 2022

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“…To properly implement the basic VV function in operation, the distribution system operator (DSO) needs to determine the control parameters defining the VV curve. The determination methods have been discussed in many researches [10–20]. Reference [10] showed different VV curve settings under different rules, and tested the control effects on a real distribution system model.…”

Section: Introductionmentioning

confidence: 99%

“…Reference [10] showed different VV curve settings under different rules, and tested the control effects on a real distribution system model. References [11–15] showed that in order to apply the VV function into a large‐scale model, better control effect can be obtained by setting VV curve considering the local voltage profiles. Considering the changes in voltage profiles due to unstable PV generation, Refs [16–18] proposed tuning the VV parameters in real‐time according to PV penetration rate, weather conditions or voltage stability.…”

Section: Introductionmentioning

confidence: 99%

A Decentralized Voltage Regulation Scheme Using Improved Volt‐Var Function of PV Smart Inverter

Xie,

Kaneko,

Hayashi

2024

IEEJ Transactions Elec Engng

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With the growing distributed PV installation rate in distribution systems, voltage regulation difficulties such as local voltage violations and fluctuations have become common. To solve the voltage regulation problems, the local voltage regulation method using volt‐var (VV) function is effective for its high regulation speed, high accuracy, and flexibility. However, there are still hurdles on real application, such as parameter setting difficulties, insufficient voltage fluctuation mitigation effect, and unfairness of reactive power generation between PV customers. To further improve the VV function, this paper proposes a PID closed‐loop based VV function and mode‐switching function of PV smart inverter (SI). To validate the proposed methods, numerical simulations were conducted using a 6‐feeder distribution system model based on the JST‐CREST 126 distribution feeder model. According to the simulation result, the proposed method can better mitigate the local voltage violation compared to basic VV function based on the VV curve, also improve the fairness between PV customers, while the total reactive power generation and tap operations increases for the aim of more adequate voltage regulation. © 2024 The Authors. IEEJ Transactions on Electrical and Electronic Engineering published by Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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“…Therefore, smart inverters and their functionalities received great attention in the literature lately. For instance, a new approach to compute the parameter settings for volt‐VAR‐watt control based on the active‐reactive power‐voltage sensitivity matrix of SI was proposed in [2]. Because the voltage sensitivity matrix is calculated based solely on the impedance of the distribution system and it does not vary with time or the number of SI, the proposed method can determine the individual smart inverter parameter settings theoretically and efficiently without the need for optimization problem formulation, power flow calculation, or communication between the SI.…”

Section: Introductionmentioning

confidence: 99%

Impact of smart photovoltaic inverter control modes on medium‐voltage grid voltage and inverter lifetime: An experimental approach

Mohamed

Saadeh

Kaviani³

2023

IET Smart Grid

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This study relies on an experimental approach, utilising real data from multiple photovoltaic (PV) sites located in the US Northeaster region, to inspect how different inverter reactive and active power settings impact gird voltage regulation and inverter life expectancy. These voltage regulation schemes come at a cost for the operator. Data from different solar sites with inverters running at different reactive and active power settings were analysed to compare operational trade‐offs. These trade‐offs range from production losses to shortening the lifetime of the inverters. Voltage versus reactive power plots were analysed to show production losses, while the thermal analysis was used to correlate with the inverter life expectancy.

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Voltage-Sensitivity-Based Volt-VAR-Watt Settings of Smart Inverters for Mitigating Voltage Rise in Distribution Systems

Cited by 20 publications

References 25 publications

Appropriate Volt–Var Curve Settings for PV Inverters Based on Distribution Network Characteristics Using Match Rate of Operating Point

Appropriate Volt–Var Curve Settings for PV Inverters Based on Distribution Network Characteristics Using Match Rate of Operating Point

A Decentralized Voltage Regulation Scheme Using Improved Volt‐Var Function of PV Smart Inverter

Impact of smart photovoltaic inverter control modes on medium‐voltage grid voltage and inverter lifetime: An experimental approach

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