Subway 10kV medium-voltage looped network power supply system

Abstract

The utility model discloses a subway 10kV medium-voltage looped network power supply system, the whole power supply system is divided into three power supply sections, three paths of power sources introduced from a superior substation respectively supply power to each power supply section, and when a station in the power supply section is a vehicle depot station, a single-bus segmented wiring mode is adopted in the station. And other stations all adopt a single-bus wiring mode. And the power supply reliability of the ring network system for power supply at the 10kV medium voltage is ensured.

Description

Technical Field

[0001] The utility model belongs to a medium-voltage network power supply system for rail transportation, in particular to a 10kV medium-voltage ring network power supply system for subways. Background Art

[0002] The medium-voltage power supply system of typical urban rail transit loop lines utilizes a dual-ring network structure and open-loop operation. This linear wiring scheme establishes several power supply sections along the entire line. Each section receives two power circuits from an external power source or main substation, connecting to two busbar sections at the first substation in the section. Substations within the section are connected by dual-circuit cables. To provide fault support, interconnecting cables and ring network sectionalizers are installed at the end of the section between power sources. During normal operation, the ring network sectionalizer is open. If one power source fails, the busbar interconnector is closed, allowing the other power source to provide backup power. If one external power source (or both power sources) fails, the ring network sectionalizer is closed, allowing the other external power source to provide backup power. This wiring scheme offers significant advantages for "linear" lines running through cities: it meets the requirement that each substation at each end of the line should have two independent power sources while avoiding circuitous power supply. However, without a tailored design that takes into account the characteristics of loop lines, the substation wiring and operation are complex, and reliability cannot be guaranteed. Utility Model Content

[0003] The purpose of the utility model is to provide a subway 10kV medium voltage ring network power supply system, which solves the problem of power supply reliability.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] A 10kV medium-voltage ring network power supply system for subways divides the entire power supply system into three power supply sections. Three power sources introduced from the upper-level substation are used to supply power to each power supply section. When a station within the power supply section is a vehicle depot station, the station adopts a single busbar segmented wiring method, while the remaining stations all adopt a single busbar wiring method.

[0006] In some specific embodiments, the power supply interval includes power supply zone one, power supply zone two and power supply zone three, and the three power supplies include 1#10kV external power supply, 2#10kV and 3#10kV. The 1#10kV external power supply supplies power to power supply zone one and power supply zone two, 2#10kV supplies power to power supply zone one, power supply zone two and power supply zone three, and 3#10kV supplies power to power supply zone three.

[0007] In some specific implementations, under normal operating conditions, the 1#10kV external power supply supplies power to the first power supply zone, the 2#10kV external power supply supplies power to the second power supply zone, and the 3#10kV external power supply supplies power to the third power supply zone;

[0008] If the 1#10kV external power supply is shut down, the 2#10kV external power supply will supply power to power supply zones 1 and 2, and the 3#10kV external power supply will supply power to power supply zone 3;

[0009] If the 2#10kV external power supply is shut down, the 1#10kV external power supply will supply power to power supply sections 1 and 2, and the 3#10kV external power supply will supply power to power supply section 3;

[0010] If the 3#10kV external power supply is shut down, the 2#10kV external power supply will supply power to power supply sections 2 and 3, and the 1#10kV external power supply will supply power to power supply section 1.

[0011] The utility model has the beneficial effects:

[0012] To ensure power supply reliability, the utility model adopts a 10kV medium voltage ring network system. Three power sources are introduced from the upper substation, and the entire power supply is divided into three power supply sections. The depot station adopts a single busbar segmented wiring form, and the other stations all adopt a single busbar wiring form. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a power supply schematic diagram of a subway 10kV medium-voltage ring network power supply system provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0014] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0015] In the description of the present invention, it should be noted that the terms "one", "two", etc., which indicate quantities, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific number, be constructed and operate in a specific number. Therefore, they cannot be understood as limiting the present invention.

[0016] Example 1

[0017] like Figure 1 This embodiment provides a 10kV medium-voltage ring network power supply system for a subway. The system is divided into three power supply sections. Three power sources introduced from the upper-level substation are used to supply power to each power supply section. When a station within a power supply section is a depot station, a single busbar segmented wiring method is used within the station. The remaining stations all use a single busbar wiring method.

[0018] In some specific embodiments, the power supply interval includes power supply zone one, power supply zone two and power supply zone three, and the three power supplies include 1#10kV external power supply, 2#10kV and 3#10kV. The 1#10kV external power supply supplies power to power supply zone one and power supply zone two, 2#10kV supplies power to power supply zone one, power supply zone two and power supply zone three, and 3#10kV supplies power to power supply zone three.

[0019] In some specific implementations, under normal operating conditions, the 1#10kV external power supply supplies power to the first power supply zone, the 2#10kV external power supply supplies power to the second power supply zone, and the 3#10kV external power supply supplies power to the third power supply zone;

[0020] If the 1#10kV external power supply is shut down, the 2#10kV external power supply will supply power to power supply zones 1 and 2, and the 3#10kV external power supply will supply power to power supply zone 3;

[0021] If the 2#10kV external power supply is shut down, the 1#10kV external power supply will supply power to power supply sections 1 and 2, and the 3#10kV external power supply will supply power to power supply section 3;

[0022] If the 3#10kV external power supply is shut down, the 2#10kV external power supply will supply power to power supply sections 2 and 3, and the 1#10kV external power supply will supply power to power supply section 1.

[0023] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Based on the technical essence of the present invention and within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A 10kV medium voltage ring network power supply system for subway, characterized in that: The entire power supply system is divided into three power supply sections. Three power sources introduced from the upper-level substation are used to supply power to each power supply section respectively. When the station within the power supply section is a vehicle depot station, the station adopts a single busbar segmented wiring form, and the remaining stations all adopt a single busbar wiring form.

2. A subway 10kV medium voltage ring network power supply system according to claim 1, characterized in that: The power supply section includes power supply zone one, power supply zone two and power supply zone three. The three power supplies include 1#10kV external power supply, 2#10kV and 3#10kV. 1#10kV external power supply supplies power to power supply zone one and power supply zone two, 2#10kV supplies power to power supply zone one, power supply zone two and power supply zone three, and 3#10kV supplies power to power supply zone three.

3. A subway 10kV medium voltage ring network power supply system according to claim 2, characterized in that: Under normal operating conditions, the 1#10kV external power supply supplies power to the power supply zone 1, the 2#10kV external power supply supplies power to the power supply zone 2, and the 3#10kV external power supply supplies power to the power supply zone 3; If the 1#10kV external power supply is shut down, the 2#10kV external power supply will supply power to power supply zones 1 and 2, and the 3#10kV external power supply will supply power to power supply zone 3; If the 2#10kV external power supply is shut down, the 1#10kV external power supply will supply power to power supply sections 1 and 2, and the 3#10kV external power supply will supply power to power supply section 3; If the 3#10kV external power supply is shut down, the 2#10kV external power supply will supply power to power supply sections 2 and 3, and the 1#10kV external power supply will supply power to power supply section 1.

Images