Tram LC Filter Stabilization by Energy Storage System

Streit, Lubos; Talla, Jakub; Janda, Martin

doi:10.14311/tee.2019.1.008

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…As mentioned in Section 4.2, the minimum allowable voltage in the trolleybus overhead traction line is 400 V. As the power load in urban transportation systems is variable and random, the charging stations that are connected to the overhead traction line should include control algorithms that provide protection from the undervoltage condition, similar to the ones implemented in the vehicles [23]. If the supply voltage drops below 500 V, the charging power should be limited, and this power limit should linearly change with the voltage to ensure system stability.…”

Section: Summary Of All Criteria and Practical Problemsmentioning

confidence: 99%

Application of Traction Supply System for Charging Electric Cars

2022

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The development of electromobility involves the development of electric cars charging infrastructure. The increase of the number of chargers poses new demands for the AC power grid, especially in regard to its capacity of delivering high peak power. As an alternative for the public AC power grid, urban electrified transportation systems (trams, trolleybuses, and metro) can be used for supplying electric cars chargers. The article discusses four options of integrating electric cars chargers with a traction power supply system. The option of connecting the charger to the traction overhead supply line has been selected due to the spatial availability of the power source and possibility to use regenerative braking energy for charging. A set of criteria has been developed for analysing the capability of the traction supply system to feed electric cars chargers. An exemplary feasibility analysis was carried out for trolleybus traction supply system in Gdynia, Poland. The impact of installing the charging station on specific traction supply parameters has been predicted using present-state recordings of electrical parameters and assumed charging station power. The study shows that every supply section of the considered trolleybus traction system has the capability of installing a fast-charging station, which provides opportunities of expanding the charging stations network in Gdynia.

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Section: Summary Of All Criteria and Practical Problemsmentioning

confidence: 99%

Application of Traction Supply System for Charging Electric Cars

2022

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“…The supercapacitors are used to store some amount of the energy which is produced by the traction drive during regenerative braking. This energy is than released if needed and it can be even used to stabilize the input LC filter with no traction drive control action adjustments [11], [12], [13].…”

Section: Introductionmentioning

confidence: 99%

LQR Control of Input LC filter of a Tram with On-board Energy Storage System

Talla

Streit

Janouš

et al. 2022

2022 International Conference on Applied Electronics (AE)

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The main traction power converter of a trams is connected to DC trolley wire by input LC filter. The tram input LC filter is almost undamped resonant circuit, which is often loaded by the motor constant torque command. Sources of the input LC filter oscillation may be present on the vehicle, typically drive control influence. The source of LC filter excitation except the tram drive could be the tram's trolley voltage caused by fluctuations in power consumption and harmonics from surrounding vehicles, and temporary loss of catenary voltage caused by crossings of insulated sections or icing on catenary. The next source could be the tram ESS, which is connected in parallel to the tram dc-link capacitor. The dynamic ESS control, which is necessary for majority of power management techniques, can also destabilize the LC filter. On the other hand, the proper ESS control could be used for LCfilter stabilization. The LQR based stabilization of LC filter using ESS is presented in this paper.

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Tram LC Filter Stabilization by Energy Storage System

Cited by 2 publications

References 10 publications

Application of Traction Supply System for Charging Electric Cars

Application of Traction Supply System for Charging Electric Cars

LQR Control of Input LC filter of a Tram with On-board Energy Storage System

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