Method for identifying position of interconnection switch

A technology of tie switch and identification method, applied in measurement devices, instruments, measuring electricity and other directions, can solve the problem of making auxiliary decision-making affecting loss reduction, reducing the level of refined management of line loss, affecting the accurate calculation of line loss in distribution network, etc. problems, to achieve the effect of assisting line loss management and loss reduction work, improving accuracy, and improving the level of line loss lean management

CN112798895APending Publication Date: 2021-05-14南京软核科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-05-14

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Abstract

The invention relates to a method for identifying the position of an interconnection switch. According to the prior art, for a distribution network interconnection line, only a static feeder-distribution transformer subordination relationship is known but the actual on-off state of each switch on the interconnection line is unknown. The invention just aims to solve the above problem. The method comprises the following steps of: determining distribution transformers closest to two sides of each switch according to a topological connection relationship and ledger data; according to the acquired voltage data of the distribution transformers, calculating the voltage correlation coefficient of the distribution transformers closest to the two sides of each switch by using a correlation calculation method, and determining the switches which may be turned on; and according to the collected active power at the head end of each feeder line and the active power of each distribution transformer, calculating the active power difference between the head end and the tail end of the feeder line, thereby determining the position of an actually opened interconnection switch. According to the method, voltage data, topological data, active data and ledger data are utilized, the correlation calculation method and the active difference calculation of the head end and the tail end of each feeder line are combined; the positioning problem of an interconnection switch in an interconnection line is solved; the accuracy of distribution network branch line loss calculation is improved; line loss management and loss reduction work are assisted; and the line loss lean management level is improved.
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Description

technical field

[0001] The invention relates to a method for identifying the position of a tie switch, which belongs to the technical field of power system applications. Background technique

[0002] The line loss rate is a comprehensive technical index of the power grid, which can effectively measure the economic operation status of the power grid. In the existing distribution network connection lines, because the actual opening and closing state of the connection switch is unknown, the connection line is often packaged and calculated to obtain the overall line loss rate of the connection line, but the precise line loss rate of each sub-line cannot be known.

[0003] With the gradual deepening of lean management requirements of the power grid, the problem of line loss calculation of distribution network sub-lines needs to be solved urgently. Regardless of the statistical line loss calculation of the branch line or the theoretical line loss calculation of the branch line, t...

Examples

Embodiment Construction

[0013] The technical solutions of the present invention will be further explained below in conjunction with the embodiments.

[0014] A method for identifying a position of a tie switch, specifically comprising the steps of:

[0015] 1) Obtain the position of each switch according to the static topological connection relationship of the tie line and ledger data, and determine the distribution transformer with the closest distance on both sides of each switch:

[0016] When the equipment parameters in the ledger data are complete, record the i switches contained in the connection line as S i , according to the topology data to search the distribution transformers on each branch of each switch side, count as T k ; Combining ledger data to calculate T separately k to S i The equivalent impedance, denoted as R ik , R ik The distribution transformer corresponding to the minimum resistance value is the distance switch S i The nearest distribution transformer on one side;

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