A Method for Incremental Correction of Power Flow Diagram

Abstract

The invention discloses an incremental correction method for a tidal atlas of an electric network. The incremental correction method comprises the following steps of: firstly performing structure hierarchical reorganization on an electric network model, defining a voltage class range of the electric network model, then performing incremental calculation on the model, further calculating a graphic increment according to calculation result of the incremental calculation of the model, and finally correcting the graphic increment of the electric network model according to the calculation result of the graphic increment. According to the incremental correction method disclosed by the invention, incremental updating of the tidal atlas of the electric network within a full voltage class range or a single voltage class range of the electric network in the jurisdiction scope of a certain control center of an electric power system can be realized, namely on the basis of realizing full graphic updating, the parts which are not changed during every correction can be prevented from being deleted and re-generated; and simultaneously, according to the incremental correction method disclosed by the invention, the graphic increment is in one-to-one correspondence with a model increment based on an IEC (International Electrotechnical Commission) 1970 / CIM (common information model) model standard, so that the changes in tidal flow of the electric network is very easy to identify, and the working difficulty of dispatching staff and operation staff of the electric network can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of electric power system scheduling automation, in particular to an incremental correction method for a power flow diagram of a power grid. Background technique [0002] Power grid power flow diagram is an important basis for dispatchers and operators to judge the real-time operation status of the power grid, formulate relevant operation modes and maintenance plans, and perform operation checks. Power Flow in Power Dispatch Automation System Figure 1 Generally, it has real-time information display such as circuit breaker status, flow and flow direction, and requires clear layout and routing, so that dispatchers can see at a glance and facilitate dispatching decisions. current grid flow Figure 1 Generally, the manual drawing method is adopted, that is, when the substation or the line is changed, the operation and maintenance personnel will manually update the contact relationship and power flow diagram acco...

AI Technical Summary

Problems solved by technology

[0004] 1) With the continuous increase of substations and lines, the task of drawing is becoming more and more difficult. Manual drawing is not only time-consuming, but also consumes a lot of manpower;

[0005] 2) The style of manual drawing is easily affected by the personal habits of different drafters, and it is very difficult to standardize and unify the description and display of power flow diagrams;

[0006] 3) The manually drawn power flow diagram cannot be well adjusted according to the planning and development of the power grid in the later stage. When the original layout of the new substation cannot meet the local space requirements, large-scale changes are required;

[0007] 4) Power flow map maintenance personnel are limited by their expertise and cannot accurately grasp the grid connection relationship. As the power grid transformation project continues, any error in an electrical component may cause misjudgment or even mis-scheduling accidents, which poses a threat to relevant personnel Maintaining grid contact maps poses extreme difficulties

[0010] However, the current automatic wiring system for grid connection relationship based on grid model data basically adopts a method similar to the maze algorithm, and its significant disadvantages are: (1) The calculation time is long, and it is not suitable for large-scale system automatic layout and wiring; (2) The layout and wiring results are random. When the grid structure changes, the original layout and wiring style is difficult to maintain, which affects the practicability

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