A Calculation Method of Safety Domain Boundary of Distribution System Based on Feeder Interconnection Relationship

A power distribution system and calculation method technology, applied in the direction of calculation, instrumentation, data processing applications, etc., can solve the problem that the safety prevention and control of the power distribution system is not comprehensive and accurate, the safety evaluation results of the power distribution system are inaccurate, and the safety domain To achieve the effect of comprehensive defense and control, rich calculation results, and huge application prospects

CN103400202BInactive Publication Date: 2017-04-12TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-04-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a distribution system security region boundary calculation method based on a feeder interconnection relationship. The method comprises the following steps of establishing a distribution system security region model based on the feeder interconnection relationship according to main transformer N-1 and feeder N-1 constraint conditions; calculating a distribution system security region boundary according to the distribution system security region model; and evaluating the security of a distribution system through the distribution system security region boundary. The method has the advantages that the existing security region boundary calculation method is enabled to be further precise, the interconnection relationship between main transformers and feeders can be simultaneously reflected, main transformer N-1 and feeder N-1 faults are simultaneously calculated, the method provides a theoretical support for more precise, safe and high-efficiency operation of a distribution network, the online real-time security monitoring, defense and control of the distribution system are enabled to become more comprehensive and precise, and preconditions are provided for further improving the level of line and main transformer load rate to a precise N-1 security limit. Under the background of future intelligent power grids, the method has a great application prospect.
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Description

technical field

[0001] The invention relates to the field of safe operation and evaluation of power distribution systems, in particular to a method for calculating the safety domain boundaries of power distribution systems based on feeder interconnection relationships. Background technique

[0002] With the development of smart distribution network, distribution automation will continue to be popularized, and the ability to quickly transfer power will become a new boundary condition for future distribution network operation [1] , the distribution network will be closer to the transmission network in terms of automation. It makes it possible to use the security domain method in the distribution network security assessment and improve its security and efficiency.

[0003] In recent years, a series of achievements have been made in the research of distribution system security domain, and the concept and preliminary model of distribution system security domain (Distribution Sys...

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Embodiment Construction

[0035] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] In order to improve the accuracy of the calculation of the boundary of the security domain and further improve the security of the distribution system, an embodiment of the present invention provides a calculation method for the boundary of the security domain of the distribution system based on the feeder interconnection relationship, see figure 1 , aiming at the above deficiencies, this method proposes a more accurate calculation method for the distribution system security domain boundary, and establishes a more accurate security domain model. Compared with the existing method, this method describes the detailed topological relationship between feeder segments and connections, can reflect the interconnection relationship betwee...