A Novel Voltage Control Scheme for Low-Voltage DC Distribution Systems Using Multi-Agent Systems

Hai, Trinh Phi; Cho, Hector; Chung, Ilyong; Kang, Hyun-Koo; Cho, Jintae; Kim, Ju–Yong

doi:10.3390/en10010041

Cited by 9 publications

(8 citation statements)

References 15 publications

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“…Based on the VSF, the total voltage compensation for the undervoltage problem from total EV discharging must be higher than or equal to the voltage deviation at the kth bus, while the total voltage reduction for the overvoltage problem from overall EV charging must be higher or equal to the voltage deviation at the h-th bus, which can be respectively defined as follows:  is the VSF defined as the effect of the power-variation control of the DERs at the i-th bus on the voltage compensation of the k-th specific bus at time step j. The authors in [18,19] suggested that the VSF can be obtained from the Jacobian matrix of the LVDC distribution system as follows:…”

Section: Voltage Regulation Constraintsmentioning

confidence: 99%

“…Many researchers have focused on voltage regulation in a DC distribution system. The authors in [18,19] proposed a voltagecontrol algorithm by coordinating the main AC/DC converter and DER scattering in a distribution system. They calculated voltage sensitivity factors (VSFs) based on the solution of load-flow analysis to calculate the relevant power injection or absorption to compensate for the voltage problems.…”

Section: Introductionmentioning

confidence: 99%

“…Section 4 comprises an explanation of the optimal DER control scheme. Last, in Section 5, we report the experimental results of various simulation studies to verify the effectiveness of the proposed optimal strategy method compared to conventional methods [18,19].…”

Section: Introductionmentioning

confidence: 99%

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Optimal Control Strategy for Distributed Energy Resources in a DC Microgrid for Energy Cost Reduction and Voltage Regulation

Trinh

Chung

2021

Energies

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Distributed energy resources (DERs), including renewable energy resources (RESs) and electric vehicles (EVs), have a significant impact on distribution systems because they can cause bi-directional power flow in the distribution lines. Thus, the voltage regulation and thermal limits of the distribution system to mitigate from the excessive power generation or consumption should be considered. The focus of this study is on a control strategy for DERs in low-voltage DC microgrids to minimize the operating costs and maintain the distribution voltage within the normal range based on intelligent scheduling of the charging and discharging of EVs, and to take advantage of RESs such as photovoltaic (PV) plants. By considering the time-of-use electricity rates, we also propose a 24-h sliding window to mitigate uncertainties in loads and PV plants in which the output is time-varied and the EV arrival cannot be predicted. After obtaining a request from the EV owner, the proposed optimal DER control method satisfies the state-of-charge level for their next journey. We applied the voltage sensitivity factor obtained from a load-flow analysis to effectively maintain voltage profiles for the overall DC distribution system. The performance of the proposed optimal DER control method was evaluated with case studies and by comparison with conventional methods.

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Section: Voltage Regulation Constraintsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimal Control Strategy for Distributed Energy Resources in a DC Microgrid for Energy Cost Reduction and Voltage Regulation

Trinh

Chung

2021

Energies

Self Cite

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“…A set of sensitivity indices is composed of various indices with different formulation approaches [32][33][34][35][36][37]. These indices measure active and reactive power changes (∆V i /∆Q i , ∆V i /∆P i ) in a system with respect to bus voltage variation.…”

Section: Sensitivity Analysis (Sa)mentioning

confidence: 99%

A Recap of Voltage Stability Indices in the Past Three Decades

et al. 2019

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Increasing demand for electricity and the modernization of power systems within competitive markets has induced power systems to operate close to their stability limits. Therefore, the continuous monitoring and control of power systems through voltage stability indices is urgently needed. This is the first-ever effort to examine more than 40 voltage stability indices based on their formulation, application, performance, and assessment measures. These indices are sorted based on a logical and chronological order considering the most recent indices to be applied worldwide. However, the generalizability of these indices in terms of multivariable objectives is limited. Despite its limitation, this study systematically reviews available indices in the literature within the past three decades to compile an integrated knowledge base with an up-to-date exposition. This is followed by a comparative analysis in terms of their similarity, functionality, applicability, formulation, merit, demerit, and overall performance. Also, a broad categorization of voltage stability indices is addressed. This study serves as an exhaustive roadmap of the issue and can be counted as a reference for planning and operation in the context of voltage stability for students, researchers, scholars, and practitioners.

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“…The set of sensitivity indices are composed of various index within different formulation approaches [30][31][32][33][34][35]. These indices are employed to measure active and reactive power changes (∆ /∆ , ∆ /∆ ) in a system with respect to bus voltage variation.…”

Section: Sensitivity Analysis (Sa)mentioning

confidence: 99%

A Recap of Voltage Stability Indices in the Past Three Decades

Danish¹,

Senjyu²,

Danish³

et al. 2019

Preprint

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Increasing demand for electricity and modernization of power systems within competitive markets induce power systems to operate close to their stability limits. Therefore, a power system continuous monitoring and control by using voltage stability indices are known exigence. This is the first-ever effort, examined more than 40 voltage stability indices thorough an exhaustive study based in on their formulation, application, performance, and assessment measures. Which is conducted based on a logical and chronological order considering the most recent worldwide applied voltage stability indices. However, the generalizability of such an immense diversity of these indices in term of multivariable objectives subjects to a certain limitation to summate into a deciphered outcome. Despite all these obstacles, this study systematically reviews available indices in the literature within the past three decades to set out an integrated knowledge with an insight up-to-date exposition. That followed with a comparative analysis in term of their similarity, functionality, applicability, formulation, merit, demerit, and overall performances. Also, a broad categorization of voltage stability indices is addressed. This study with an immediate implication in practice as an exhaustive roadmap can be counted a planning and operation reference in the context of voltage stability for students, researchers, scholars, and practitioners.

show abstract

A Novel Voltage Control Scheme for Low-Voltage DC Distribution Systems Using Multi-Agent Systems

Cited by 9 publications

References 15 publications

Optimal Control Strategy for Distributed Energy Resources in a DC Microgrid for Energy Cost Reduction and Voltage Regulation

Optimal Control Strategy for Distributed Energy Resources in a DC Microgrid for Energy Cost Reduction and Voltage Regulation

A Recap of Voltage Stability Indices in the Past Three Decades

A Recap of Voltage Stability Indices in the Past Three Decades

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