Quasi-static decoupled load flow modelling of a power supply network with AC-DC converters applied to light rail system

Chenh, S.; Sautreuil, Matthieu; Riu, Delphine; Rétière, Nicolas

doi:10.1109/epe.2007.4417602

Cited by 8 publications

(8 citation statements)

References 7 publications

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“…This procedure consists of computing the active and reactive power demand of the 3-phase bridge rectifier starting from the DC voltage and the current output values [33]- [34]. According to the rectifier equivalent model described by (13), |Vll|, α, and µ are unknowns while Ed and Id are constant terms.…”

Section: B Dc/ac Conversionmentioning

confidence: 99%

Impact Assessment of Energy Storage Systems Supporting DC Railways on AC Power Grids

et al. 2022

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Energy storage systems (ESSs) represent an established solution for energy saving and voltage regulation in DC urban railway systems. In particular, ESSs can store the braking energy of light rail vehicles (LRVs) and support the DC feeder system during traction operations. Moreover, ESSs can significantly improve the operating conditions of the AC supply system by reducing voltage drops and current spikes. This paper investigates the impact of wayside and on-board ESSs supporting the DC railway infrastructure, on the bus voltages and branch currents of the AC grid. An iterative algorithm solves the decoupled AC/DC power flow considering the 3-phase bridge rectifier model of traction substations. A novel mathematical formulation of the optimization problem to solve the positioning and sizing of supercapacitor-based wayside ESSs is proposed considering both DC and AC network constraints. The effectiveness of the proposed method is proved through numerical simulations on a real Italian DC railway system. Obtained results are presented and discussed, also comparing the proposed methodology to several existing literature solutions.INDEX TERMS AC power grid, AC/DC load flow, energy storage system, railway system simulation, supercapacitors.

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Section: B Dc/ac Conversionmentioning

confidence: 99%

Impact Assessment of Energy Storage Systems Supporting DC Railways on AC Power Grids

et al. 2022

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“…Hiệu quả năng lượng đang là vấn đề rất được quan tâm trong hệ thống giao thông điện đường sắt. Những nghiên cứu đã chỉ ra rằng 40% năng lượng cấp cho đoàn tàu có khả năng được trả lại lưới tiếp xúc trong chế độ hãm dừng đoàn tàu [1]. Hiện tại hầu hết các Trạm Điện Kéo (TĐK) của các hệ thống cung cấp điện giao thông đô thị đều sử dụng các bộ chỉnh lưu diode cung cấp dòng điện một chiều cho các đoàn tàu thông qua lưới tiếp xúc.…”

Section: đặT Vấn đềunclassified

Ước lượng năng lượng thu hồi tại các trạm điện kéo dựa trên mô hình mạng công suất

Văn¹,

Đức²

2020

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Bài báo trình bày một thuật toán ước lượng năng lượng tái sinh có khả năng thu hồi được tại vị trí trạm điện kéo dựa trên mô hình công suất mạch điện. Thuật toán đề xuất dựa trên luật cân bằng công suất của mạch điện, sử dụng phương pháp lặp Newton-Raphson để xác định năng lượng tái sinh có khả năng thu hồi được trong điều kiện duy trì cho điện áp trên lưới tiếp xúc không vượt qua giá trị cho phép. Các kết quả ước lượng trong mô hình mô phỏng một tuyến đường sắt giao thông đô thị dựa trên số liệu tuyến đường và thông số đoàn tàu tuyến Cát Linh – Hà Đông minh họa cho tính khả thi và tính hiệu quả của thuật toán đề xuất.

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“…The switching losses of the switch pair are Figure 6 shows a high level schematic for the proposed dc catenary charging system. This design was based partly on the work in [21]. The system was chosen to be dc to simplify the vehicle charging electronics and give an optimistic evaluation of costs and equipment volume.…”

Section: Dc-dc Convertermentioning

confidence: 99%

Analysis of wireless and catenary power transfer systems for electric vehicle range extension on rural highways

Navidi

Cao

Krein

2016

2016 IEEE Power and Energy Conference at Illinois (PECI)

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This paper analyzes two different transportation electrification charging schemes, i.e., an embedded wireless power transfer system and an overhead catenary wire system, for use in range extension of electric vehicles on rural highways. The efficiency, feasibility, and benefits of the two schemes are examined. Electric vehicles currently lack widespread popularity mainly due to battery limitations, especially for long distance travel. The rural highway charging methods presented here can greatly increase the range of electric vehicles while decreasing battery sizes. Average modeling approaches for power electronics and vehicle usage were developed in MATLAB/Simulink to compare the two systems, each at two power levels. 30 kW and 48 kW were chosen to demonstrate the differences between power levels, both capable of maintaining a positive net charge on a dynamic electric vehicle.Component efficiencies, energy transfer levels, and installation percentages for the various models were determined. The models were applied to California highway I-5 to show immense potential savings over gasoline vehicles. It was shown that catenary charging is cheaper and has higher energy transfer than wireless; however, it has difficulty servicing all vehicle types, has visible wires, and requires more maintenance. A small scale hardware prototype of the WPT system was created in order to demonstrate the feasibility of power transfer at the proposed relative distances and speeds.

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Quasi-static decoupled load flow modelling of a power supply network with AC-DC converters applied to light rail system

Cited by 8 publications

References 7 publications

Impact Assessment of Energy Storage Systems Supporting DC Railways on AC Power Grids

Impact Assessment of Energy Storage Systems Supporting DC Railways on AC Power Grids

Ước lượng năng lượng thu hồi tại các trạm điện kéo dựa trên mô hình mạng công suất

Analysis of wireless and catenary power transfer systems for electric vehicle range extension on rural highways

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