A double power converter installed in the substation and connected to the main equipment that already exists in the substation, such as the transformer and rectifier.
The system continuously monitors the catenary until it detects the point at which there is braking ener- gy from one vehicle that is unable to be used by another vehicle. At this time, the system extracts this energy from the catenary and transforms it according to the quality parameters of the supply grid so that this energy can be injected into the grid.
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Main Advantages
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Its use does not require big modifications in the substation’s current installations, offers the possibility of re-using high-cost components, like transformers.
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The operation of this system is transparent to the existing system.
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Components do not require exhaustive maintenance, since sensitive components, like condensers, are separated from harmonic currents.
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It is not affected by short-circuits in the catenary.
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The power of the system is programmed based on the previewed saving and not on total installed power, thus reducing costs.
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The power transferred to the three-phase grid is of high quality and generated from stable DC voltage.
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It can be used in high-voltage grid environments, without affecting the quality parameters of collected energy.
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Moreover, the device may be used as an active filter to regulate the substation’s consumption (resulting in savings due to the improvement of the Cos phi).
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The device can be used during power consumption peaks, providing power to the catenary with quality AC grid consumption.
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| With this device the train’s power saving function can be separated from operating function. |