Segmented interval ground power supply system and operation method for electric vehicles

Abstract

The invention discloses an electric vehicle segmented isolation type ground power supply system and a running method. An in-feed module is divided into groups in an isolating manner. A vehicle-mountedpower receiving input line is formed by a unilateral diode DI. An anode of a vehicle-mounted electrical storage device is connected to a cathode of a vehicle power-consuming device input line and a unilateral diode power receiving input line. The vehicle is provided with a peak voltage absorbing circuit. A computer detecting control system detects the electrical parameter state of the unilateraldiode power receiving input line, the vehicle power-consuming input line, and the vehicle-mounted electrical storage device. The charging and discharging work state of the vehicle-mounted electrical storage device can be controlled based on whether the vehicle is under regeneration brake and whether the input line is electrified. The invention is advantageous in that system cost can be greatly reduced; system running quality can be improved; brake regeneration energy can be fully recycled.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle power supply, and in particular relates to a segmented and spaced ground power supply system and an operating method for electric vehicles. Background technique [0002] It has been more than 100 years since the German patent No. 12593 was first proposed in 1900 for electric vehicle segmental continuous ground power supply. Although this solution has many advantages such as canceling the overhead network cable, convenient and safe access, and favorable urban landscape, there are still some technical problems that have not been solved, which hinders the practical application. For a long time, people's efforts have mainly focused on how to ensure the safety of the power feeding equipment to the surrounding environment. In the 1990s, the European patent EP-B-0761493 proposed a modular feeding scheme, which better solved this problem. The contribution of this scheme is: when the vehicle is ...

AI Technical Summary

Problems solved by technology

But these attempts are not widely applicable due to the following problems:

[0004] 1) In order to ensure that the vehicle can travel a long enough distance after one charge, it is necessary to configure a large-capacity on-board super capacitor, which will inevitably occupy a large space and weight of the vehicle, especially when the ramp is long and difficult to achieve

[0005] 2) During the operation of the vehicle, the voltage of the on-board supercapacitor is continuously decreasing, which will inevitably reduce the transmission efficiency of the vehicle

[0006] 3) Each docking station needs to be equipped with high-current fast charging equipment. Generally, the charging current is as high as 1000-2000A, which makes the working condition of the matching substation always switch between short-term high current and long-term no-load. Both working conditions seriously affect the power transmission efficiency

One is to dissipate the electric energy generated by braking through the braking resistor, which not only wastes energy, but also occupies the space and weight of the vehicle

The other is to feed back the electric energy generated by braking to the grid. Although the braking electric energy is recovered, it will also affect the power supply quality of the grid.

Images