Network-level power dispatching system for urban rail transit lines

Abstract

The invention discloses a network-level power dispatching system for urban rail transit lines. The system realizes the hierarchical and hierarchical control and emergency treatment on an urban rail transit power supply system by wire network-level power dispatching of an urban rail transit wire network management and control center and line-level power dispatching of a line control center based onthe adoption of a wire network dispatching-line control integrated framework. The cooperative management and control of line network electronic speed controller and line electronic speed controller are realized by adopting a whole line network power dispatching order and line power supply operation order system. A whole line network power supply system real-time power flow calculation system is adopted. An IEC-61970 standard public information model is taken as a basis. An urban rail transit special power supply equipment model is expanded. The power supply system alternating current and direct current hybrid power flow calculation is carried out. The safety check and system optimization scheduling are carried out on an urban rail transit overall power supply network. According to the invention, the management benefit of cooperative power dispatching of each line in the urban rail transit network environment is improved.

Description

technical field [0001] The invention relates to the technical field of urban rail transit, in particular to a network-level power dispatching system for urban rail transit. Background technique [0002] With the rapid development of urban rail transit, the rail transit power supply system is also developing in the direction of networking. Most of the urban rail transit uses a 110kV dedicated main substation to provide centralized power supply for rail transit. With the development of line construction, the demand for urban rail 110kV dedicated main substations is increasing, and the scale of the power supply network is also increasing . Since the urban rail transit is located in the core area of ​​the city, the power supply access point that the power company can provide for the main substation dedicated to the rail and the 110kV power supply corridor in the main urban area are very scarce resources. The construction of the main substation dedicated to the rail is increasin...

AI Technical Summary

Problems solved by technology

[0005] (2) There are more and more 110kV main substations and 35kV mixed substations in the urban rail transit power supply system. At present, they operate separately according to the line management, and there is no communication between the information. The operation of the power supply system causes changes in the operation mode of the power supply system, which is likely to affect other lines. Therefore, a system within the scope of the entire line network is required to uniformly issue orders and supervise the operation coordination of each line.

[0006] (3) With the expansion of the line network scale, the number of transfer stations is increasing, and there are more and more flexible power supply operation modes. The operation of the power supply system has been upgraded from a single line operation mode to a line network operation mode. A single line The resulting catastrophic failure may develop into multiple failures of the entire line network power supply system

In the case of multiple faults, the power supply system needs to operate multiple lines at the same time. If the scheduling decision is not made at the line network level, the power supply cannot be restored quickly

[0007] (4) The current urban rail transit line-level power monitoring system only realizes the monitoring function of the single-line power supply system. Support data sharing and interoperability between monitoring systems of various lines, and power supply system analysis and decision-making capabilities based on standard modeling

[0008] (5) In cities where the power supply system has formed a line network, operations involving the sharing of main substations and transfer stations may affect multiple lines. It will be difficult to adjust the operation mode of the power supply system through line monitoring. Master the operation status of the power supply system of the whole system and it is difficult to estimate the impact on the power supply system after the adjustment of the operation mode

[0009] To sum up, the sub-line power monitoring mode can no longer meet the requirements of fast operation of 110kV main substation and 35kV ring network of multiple lines in the line network power supply system, and it is also used in support of power supply, rapid restoration of power supply after failure, and optimal dispatch of power supply system. In these aspects, a single line power monitoring system cannot grasp the whole picture of the power supply system, and cannot make global scheduling decisions

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