Coordinated voltage regulation of hybrid AC/DC medium voltage distribution networks

Lu, Zhengding; Chen, Ying; Shen, Chen; Tang, Wei; Liang, Jun

doi:10.1007/s40565-017-0324-x

Cited by 18 publications

(15 citation statements)

References 24 publications

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“…For example, Wang and Wang proposed a strategy of load peak shaving and valley filling using vehicle‐to‐grid systems . Zhang et al and Bai et al applied the time‐of‐use price to guide the EVs not to be charged during the peak load period. Tan et al presented an optimal scheduling of vehicle‐to‐grid using the genetic algorithm to minimize the variance of the load curve.…”

Section: Introductionmentioning

confidence: 99%

A Real‐Time Multilevel Energy Management Strategy for Electric Vehicle Charging in a Smart Electric Energy Distribution System

He³

et al. 2019

Energy Tech

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The randomness of electric vehicle (EV) charging has negative impacts on three‐phase imbalance and peak–valley difference in electric energy distribution systems. Traditional EV charging strategies have shortcomings: the performance of three‐phase imbalance mitigation may be limited if the grid‐connected EVs are extremely imbalanced on three phases; in addition, the comprehensive regulation of peak–valley difference and three‐phase imbalance is not developed, and the three‐phase imbalance of reactive power is ignored. Therefore, a real‐time multilevel energy management strategy (RMEMS) for EV charging is proposed. A tri‐level optimization model (TOM) is designed as the central system. In upper‐level optimization, the three‐phase selection (TPS) of EVs is optimized to balance active or reactive power consumption on three phases. Based on the results from upper‐level optimization, the charging active power is regulated in middle‐level optimization to reduce the peak–valley difference on each phase. In lower‐level optimization, the reactive power compensated by EV chargers is optimized based on the results from upper‐level and middle‐level optimization to balance the reactive power on three phases. Case studies show that the proposed RMEMS performs well for balancing active and reactive power consumption on three phases, and the peak–valley differences of active power consumption on each phase are all mitigated.

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Section: Introductionmentioning

confidence: 99%

A Real‐Time Multilevel Energy Management Strategy for Electric Vehicle Charging in a Smart Electric Energy Distribution System

He³

et al. 2019

Energy Tech

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“…The fast development of power electronics converter based direct-current (DC) technology is driving the transformation of power energy systems [2]- [3]. The DC technology is raising more and more attractions in the top and tail of energy networks: transmission and distribution electric power systems.…”

Section: Introductionmentioning

confidence: 99%

“…The feasibility, operation and control, and protection of building VSC-based MVDC grids and hybrid MV AC/DC distribution networks have been studied in the literature [2]- [3], [6]- [13]. The real applications of MVDC technology in the ANGLE-DC and Tangjiawan projects have been presented in [6]- [7].…”

Section: Introductionmentioning

confidence: 99%

“…The real applications of MVDC technology in the ANGLE-DC and Tangjiawan projects have been presented in [6]- [7]. The power-voltage coordinated control of using the VSCs in hybrid AC/DC distribution networks have been proposed in [2]- [3]. References [8]- [9] investigate the fault protection of AC grid-side unbalanced fault in a distribution network with a soft-open-point.…”

Section: Introductionmentioning

confidence: 99%

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Comparisons of MVAC and MVDC Systems in Dynamic Operation, Fault Protection and Post-Fault Restoration

Zhang

Joseph

et al. 2019

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

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One of the most significant obstacles preventing the large-scale application of direct-current (DC) technology in medium voltage (MV) distribution networks is their fault protection. The existing AC relay protection needs to be changed or redesigned to protect the future overlay MVAC and MVDC distribution networks. Therefore, a comprehensive understanding of the dynamic and fault behavior and post-fault restoration strategies of MVAC and MVDC systems are critically important. Moreover, a comparison of MVAC and MVDC systems during a fault will also contribute to designing the protection systems of hybrid MV AC/DC systems. In this paper, the challenges of protecting DC faults of MVDC systems and possible solutions are first introduced. Then, the fault characteristics and post-fault restoration of MVDC and MVAC distribution systems are compared and investigated through case studies. Time-domain simulations have been conducted in PSCAD/EMTDC. The work in this paper will be valuable for the protection design for future hybrid MV AC/DC systems.

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“…Voltage source converters (VSCs) have been utilized to convert AC lines into DC lines to improve DG accommodations [10]. To realize the coordinated voltage regulation in a hybrid AC/DC distribution system, a priority-based real-time control strategy was proposed according to the voltage control effect of active-reactive power adjustment in [11]. Multiple battery energy storage systems (ESSs) have been considered in distribution networks for real-time voltage regulation in [12].…”

Section: Introductionmentioning

confidence: 99%

Two-Stage Stochastic Programming Scheduling Model for Hybrid AC/DC Distribution Network Considering Converters and Energy Storage System

Peng¹,

Guo²,

Huang³

et al. 2019

Applied Sciences

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The development of DC distribution network technology has provided a more efficient way for renewable energy accommodation and flexible power supply. A two-stage stochastic scheduling model for the hybrid AC/DC distribution network is proposed to study the active-reactive power coordinated optimal dispatch. In this framework, the wind power scenario set is utilized to deal with its uncertainty in real time, which is integrated into the decision-making process at the first stage. The charging/discharging power of ESSs and the transferred active/reactive power by VSCs can be adjusted when wind power uncertainty is observed at the second stage. Moreover, the proposed model is transformed into a mixed integer second-order cone programming optimization problem by linearization and second-order cone relaxation techniques to solve. Finally, case studies are implemented on the modified IEEE 33-node AC/DC distribution system and the simulation results demonstrate the effectiveness of the proposed stochastic scheduling model and solving method.

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Coordinated voltage regulation of hybrid AC/DC medium voltage distribution networks

Cited by 18 publications

References 24 publications

A Real‐Time Multilevel Energy Management Strategy for Electric Vehicle Charging in a Smart Electric Energy Distribution System

A Real‐Time Multilevel Energy Management Strategy for Electric Vehicle Charging in a Smart Electric Energy Distribution System

Comparisons of MVAC and MVDC Systems in Dynamic Operation, Fault Protection and Post-Fault Restoration

Two-Stage Stochastic Programming Scheduling Model for Hybrid AC/DC Distribution Network Considering Converters and Energy Storage System

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