scholarly journals Load Transfer Path Search and Its Evaluation between Networks in Consideration of the Mobile Energy Storage of Electric Vehicles

2021 ◽  
Vol 12 (4) ◽  
pp. 210
Author(s):  
Dongyu Mao ◽  
Xueliang Huang ◽  
Zhong Chen ◽  
Yang Lv ◽  
Jiang Tian ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electric Vehicles ◽  
Power Supply ◽  
Load Transfer ◽  
Distribution Networks ◽  
Transfer Scheme ◽  
Weighting Method ◽  
Transfer Path ◽  
Edge Matching ◽  
Node Network

Load transfer is an important way of restoring a power supply after equipment failure or maintenance. However, current methods ignore cooperation between networks and users, and they also fail to take into account the vehicle-to-grid (V2G) potential of electric vehicles (EVs). In this paper, a load transfer scheme between transmission and distribution networks is proposed, considering the mobile energy storage capacities of electric vehicles. First, the mobility characteristic and the available discharge capacity of EVs are analyzed on the basis of the parking generation rate. Then, the breadth-first algorithm is used to search the load transfer paths within and between stations, and an edge matching method is proposed to realize the conversion between networks with different voltage levels. Lastly, the optimal combination weighting method was adopted to combine subjective and objective index weights and to evaluate power supply paths. The effectiveness of the proposed scheme is validated in a case composed of an IEEE 30-node network and an IEEE 57-node network, with four typical scenarios.

scholarly journals Sizing and Siting of Distributed Generators and Energy Storage in a Microgrid Considering Plug-in Electric Vehicles

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2293 ◽  
Author(s):  
Mingrui Zhang ◽  
Ming Gan ◽  
Luyao Li
Keyword(s):  
Energy Storage ◽  
Electric Vehicles ◽  
Power Supply ◽  
Economic Power ◽  
Two Stage ◽  
Suggested Approach ◽  
Distributed Generators ◽  
Power Dispatch ◽  
Operational Variables ◽  
Economic Power Dispatch

This paper presents a sizing and siting model for distributed generators (DGs) and energy storage systems (ESS) towards the design of a cost-efficient and reliable microgrid considering electric vehicles (EVs). The proposed model exploits the coordinated energy dispatching of DGs, ESS, and EVs, aiming at minimizing the overall planning and operating cost as well as meeting power supply reliability requirements. This issue is addressed in a two-stage framework. The upper stage determines the sizes and sites of candidate DGs and ESS, and the lower stage optimizes the microgrid’s economic power dispatch. Since the two-stage model contains both planning and operational variables, a two-stage iterative heuristic algorithm is designed. The effectiveness of the proposed approach is validated by case studies, and corresponding results demonstrate that the planning approach that considers coordinated management of an EV fleet and economic power dispatch of microgrid achieves better economics. In addition, the suggested approach can also better match distributed generation and power demands as well as securing microgrid power supply.

The Development of Load Transfer Decision Assistant System for Regional Power Grid

2012 ◽  
Vol 614-615 ◽  
pp. 1700-1705
Author(s):  
Kun Zhao ◽  
De Yue Men ◽  
Yu Pei Jia ◽  
Yan Sheng Lang ◽  
Zhi Min Ma
Keyword(s):  
Load Transfer ◽  
Economic Security ◽  
Transfer Scheme ◽  
Transfer Path ◽  
Limit Value ◽  
System Method ◽  
Implementation Scheme ◽  
Path Search ◽  
Security Indicators ◽  
Grid Loss

According to the features of distribution network, this paper designed the implementation scheme of load transfer decision assistant system. Based on the load transfer path search method and expert system method to analysis the load transfer path, the economic index and safety index evaluate function was established by the switching times , the grid loss, impulse current, load rejection and off-limit value. Through the economic security indicators, the feasibility and risk of load transfer scheme was determined.

scholarly journals Optimal Sizing Procedure for Electric Vehicle Supply Infrastructure Based on DC Microgrid with Station Commitment

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1901 ◽  
Author(s):  
Benedetto Aluisio ◽  
Maria Dicorato ◽  
Imma Ferrini ◽  
Giuseppe Forte ◽  
Roberto Sbrizzai ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electric Vehicles ◽  
Power Supply ◽  
Energy Exchange ◽  
Optimal Operation ◽  
Dc Microgrid ◽  
Photovoltaic Panels ◽  
Specific Approach ◽  
Definition Of

The diffusion of electric vehicles (EVs) can be sustained by the presence of integrated solutions offering parking and clean power supply. The recourse to DC systems allows better integration of EV bidirectional energy exchange, photovoltaic panels, and energy storage. In this paper, a methodology for optimal techno-economic sizing of a DC-microgrid for covering EV mobility needs is carried out. It is based on the definition of different scenarios of operation, according to typical EV usage outlooks and environmental conditions. In each scenario, optimal operation is carried out by means of a specific approach for EV commitment on different stations. The sizing procedure is able to handle the modular structure of microgrid devices. The proposed approach is applied to a case study of an envisaged EV service fleet for the Bari port authority.

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