Flexible direct-current traction power supply system connected with distributed external power supply and operation method thereof
A traction power supply system, flexible DC technology, applied in AC networks with different sources of the same frequency, power transmission AC networks, single-network parallel feeding arrangements, etc., can solve the problem of high energy consumption and redundant capacity utilization of traction stations. problems of low and high demand, to achieve the effect of reducing the incoming line reserve capacity, improving the voltage stability, and improving the transportation capacity
Pending Publication Date: 2021-11-12
天津华凯电气有限公司
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Problems solved by technology
In order to solve the problems of the traditional DC traction power supply system, such as high demand for external power supply, low utilization rate
Method used
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[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0044]The following describes the flexible DC traction power supply system connected with distributed external power supply and its operation method according to the embodiments of the present invention with reference to the accompanying drawings.
[0045] Firstly, a flexible DC traction power supply system connected to a distributed external power supply according to an embodiment of the present invention will be described with reference to the accompanying drawings.
[0046] figure 1 It is a schematic structural diagram of a f...
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The invention discloses a flexible direct-current traction power supply system connected with a distributed external power supply and an operation method. The flexible direct-current traction power supply system comprises a plurality of flexible direct-current traction stations; according to the flexible direct-current traction stations, an external power supply is connected through two power inlet wires; the two paths of power supply incoming lines are respectively connected to segmented power supply buses; a plurality of traction transformers and a plurality of bidirectional converters are connected to the two segmented power buses respectively, the direct current sides of the converters are connected to a traction bus, and the traction bus is connected with a contact network; the power buses are connected with the distribution transformer through circuit breakers, and the power buses of the adjacent flexible direct current traction stations are connected with medium-voltage tie lines through the circuit breakers. Therefore, the external power supply requirement of the direct-current traction power supply system can be reduced, the traction station equipment capacity utilization rate and the locomotive regenerative braking energy utilization rate are improved, energy and carbon are saved, the electric energy quality of an alternating-current and direct-current system is managed, many advantages are brought to the traction power supply system, and a technical scheme is provided for the actual engineering of the rail transit flexible direct-current traction power supply technology.
Description
technical field [0001] The invention relates to the technical field of flexible DC traction power supply, in particular to a flexible DC traction power supply system connected to a decentralized external power supply and an operating method thereof. Background technique [0002] Flexible DC traction power supply technology can largely overcome the defects of diode rectification power supply schemes and energy-feedback power supply schemes, and is a future development trend. With the rapid growth of the carrying capacity and mileage of urban rail transit, the requirements for the power supply capacity and power supply distance of the DC traction power supply system have also increased. In order to solve the problems of the traditional DC traction power supply system, such as high demand for external power supply, low utilization rate of redundant capacity of the traction station, and excessive energy consumption, it is necessary to study a flexible DC traction power supply sc...
Claims
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Patent Timeline
Login to view more IPC IPC(8): H02J3/36H02J3/06H02J3/26H02J3/24H02J3/38
CPCH02J3/36H02J3/06H02J3/26H02J3/24H02J3/38Y02E40/50Y02E60/60
Inventor 魏应冬李笑倩李占赫李子明白雪莲陆超黄俊杰
Owner 天津华凯电气有限公司
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