Operating phase and frequency selection of low frequency AC transmission system using cycloconverters

Achara, Pichetjamroen; Ise, Toshifumi

doi:10.1109/ipec.2014.6870028

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…Thus, frequency optimization is one of the most important parameters of LFAC. Reference [31] studied the operating characteristics of LFAC with different structures, due to the operating characteristic is the basis for frequency selection. Reference [32] gave the operating frequency range of LFAC based on the current capacity, power loss and voltage offset.…”

Section: Figurementioning

confidence: 99%

Frequency selection method for urban low frequency multi‐terminal interconnected systems

Zhang

2023

IET Generation Trans & Dist

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Large-scale urban power grid (LUPG) is normally under the operating mode by voltage layer and zone partition. One of the most important directions for the development of urban is to enhance the controllability by flexible low-frequency interconnection technology. In this study, a frequency selection method for urban low-frequency multi-terminal interconnected systems (ULFMIS) is proposed. Firstly, the required support power under different conditions, the index number of sending partition (SP) and receiving partition (RP) are determined. Secondly, by calculating the current distribution along the line under different support powers, the upper limit of the transmission frequency (ULTF) of each line is obtained. Finally, the smallest transmission frequency among the ULTFs of different tie lines is selected as the ULTF of the ULFMIS. The proposed method is validated in a typical four-terminal ULFMIS. The results demonstrate that the suggested method is suitable for calculating the ULTF taking account of the influence of the number of parallel lines on economic cost and provide guidance for future practical ULFMIS projects.

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Section: Figurementioning

confidence: 99%

Frequency selection method for urban low frequency multi‐terminal interconnected systems

Zhang

2023

IET Generation Trans & Dist

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“…When the transmission distance reaches 100 km and 175 km respectively at 50Hz, the charging power will occupy the transmission capacity of the whole line and the transmission active power is 0, if the transmission frequency is15Hz, the charging power will be reduced effectively, as shown in Figure 4. Foreign scholars also have similar research, reducing the transmission frequency, the transmission active power decline rate greatly reduced [26].…”

Section: Comparison Of Low Frequency and Conventional Ac Delivery Modementioning

confidence: 86%

Applicability of Low Frequency Transmission Technology in Offshore Wind Power Transmission Scene

Yang¹,

Jiang³

et al. 2020

E3S Web Conf.

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This paper investigates the worldwide development status of wind power and the main opinions and advantages of offshore wind power development in the industry, and summarizes that the development of offshore wind power will be in the direction of large capacity and distant sea area. At the same time, the distribution of wind energy resources in China’s coastal areas is investigated, and combined with the constraints of offshore wind energy development in China, it is concluded that offshore wind power development in China will also develop to distant sea areas. Secondly, three transmission modes including power frequency AC, flexible HVDC and low frequency AC are briefly described, and the technical economy of the three modes is analyzed with typical cases. In addition, the technical feasibility of 400 MW offshore wind power Grid-connected through low-frequency transmission technology is verified by system model building and simulation. Thirdly, combined with the development trend of offshore wind power, current research and manufacturing level, the opportunities and challenges of the application of low frequency transmission technology are analyzed. Finally, the main points of this paper are summarized. It is preliminarily clear that the low-frequency transmission mode has better technical and economic performance within a certain transmission distance, and can be used as a beneficial supplement to the conventional power frequency and flexible HVDC transmission mode.

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Operation characteristics of low frequency AC cable transmission system for urban grid

Fan

Yang

Xiao

et al. 2016

2016 China International Conference on Electricity Distribution (CICED)

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Operating phase and frequency selection of low frequency AC transmission system using cycloconverters

Cited by 4 publications

References 6 publications

Frequency selection method for urban low frequency multi‐terminal interconnected systems

Frequency selection method for urban low frequency multi‐terminal interconnected systems

Applicability of Low Frequency Transmission Technology in Offshore Wind Power Transmission Scene

Operation characteristics of low frequency AC cable transmission system for urban grid

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