Abstract
The optimization of structural parameters of controllable reactor of transformer type (CRT) is of great significance for improving its economic benefits. This paper takes the new-type magnetic integration structure CRT as the research object. Qualitative analysis is employed to explore the relationship between loss, cost and structural parameters of CRT. The optimization model of structural parameters is established with the objective of minimizing cost and loss. The genetic algorithm is used to optimize the structural parameters of CRT. Based on this, a new economic calculation method of CRT's structural parameters is proposed. The results show that the optimization of CRT's structural parameters aiming at minimizing cost and loss is essentially to optimize the cross-sectional area of iron core and the length of winding coil. A new method for calculating CRT's structural parameters based on genetic algorithm optimization has more reasonable calculation results. With the increase of CRT operating time, the proportion of CRT use costs caused by loss will gradually increase. The methods and conclusions used in this paper provide some theoretical guidance for the structural design and optimization of CRT.
Highlights
In recent years, the development of high-speed railway in China is extremely rapid
The relationship between cost, loss and structural parameters is analyzed, and an optimization model of structural parameters is established with minimum cost and loss as the optimization goals
(2) The optimization model of structural parameters of Controllable Reactor of Transformer Type (CRT) is established, and a new method for calculating the CRT structural parameters based on genetic algorithms is proposed
Summary
The development of high-speed railway in China is extremely rapid. As we all know, the electric locomotive, as the maximum load of the electrified railway, itself is unpowered and needs to be powered by a traction power supply system. As a new type of controllable reactor, the Controllable Reactor of Transformer Type (CRT) can achieve fast and smooth adjustment of a wide range of capacity, and the content of harmonics is smaller, and the response of the device is more sensitive It plays an important role in compensating line reactive power, limiting power frequency over-voltage, and enhancing system stability [4], [5], which is the core equipment of reactive power compensation for electrified railways. Calculation of CRT, iron core calculation and winding calculation are very important links, which directly determine the technical parameters of the CRT body structure such as loss, impedance, electromotive force, and the basic parameters such as cost, volume, weight [8].
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