CN102916493B - Imaging method for dynamically displaying failure recovery path of power grid - Google Patents

Abstract

The invention discloses an imaging method for dynamically displaying a failure recovery path of a power grid, and belongs to the field of failure monitoring technology of power systems. After a failure happens in a power grid, a failure recovery system is started to search power supply recovery paths. The quality of each recovery path is evaluated, and the power supply paths with different quality degrees are dynamically displayed on an image interface in different colors. Based on a VC2010 programming tool, failure simulation is performed by utilizing a local power grid model in a region, so that the power supply paths are displayed dynamically.

Description

A Graphical Method of Dynamic Display of Power Grid Fault Restoration Path

technical field

The invention belongs to the technical field of power system fault monitoring, and in particular relates to a graphical method for dynamically displaying a fault recovery path of a power grid.

Background technique

The traditional power grid fault recovery path is usually given in the form of a recovery report or in paper. The recovery report mainly includes the executable switch switch operation sequence. The dispatcher can perform recovery operations according to the switch switch operation sequence provided by the recovery report, but this This display method is not intuitive enough, and the dispatcher needs to read the entire recovery report to better understand the recovery path.

Contents of the invention

The object of the present invention is to provide a dynamic display method for a graphical grid fault recovery path, characterized in that, based on the VC2010 programming tool, the graphical grid fault recovery path dynamic display method includes the following steps:

1) Through the fault recovery system, the path search is carried out for the non-fault power outage area after the grid fault;

2) After the search is completed, evaluate the pros and cons of each recovery path through the five indicators of path flow limit, switch operation times, bus voltage limit, power grid loss rate, and power grid reserve capacity;

3) According to the evaluation results, color and mark each recovery path, and dynamically display the recovery path on the graphical interface.

The dynamic display of each recovery path includes displaying the evaluation index of each recovery path, and when dynamically displaying the recovery path, displaying blinking switches that need to be activated during the recovery operation.

After the path search is completed, the restoration path is dynamically displayed on the interface of the geographical wiring diagram and the main wiring diagram of the power grid, which is convenient for the dispatcher to intuitively understand the restoration path.

The beneficial effect of the present invention is that when the recovery path is dynamically displayed, the evaluation index list of each recovery path is displayed, which is convenient for the dispatcher to understand the pros and cons of the recovery path more accurately, and is convenient for the dispatcher to intuitively understand the recovery path, and for each recovery path The switch that needs to be operated changes color and flickers, which is convenient for the dispatcher to operate.

Description of drawings

Figure 1 is the electrical main wiring diagram of a local power grid in a certain area;

Figure 2 is a geographic wiring diagram of a local power grid in a region;

Detailed ways

The invention provides a graphical power grid fault recovery path dynamic display method. Describe below in conjunction with accompanying drawing.

The present invention is based on the VC2010 programming tool, and the dynamic display method of the fault recovery path of the power grid includes the following steps:

1) Through the fault recovery system, the path search is carried out for the non-fault power outage area after the grid fault;

2) After the search is completed, evaluate the pros and cons of each recovery path through the five indicators of the path flow limit rate, switch operation times, bus voltage limit rate, power grid loss rate, and power grid reserve capacity;

3) According to the evaluation results, color and mark each recovery path, and dynamically display the recovery path on the graphical interface.

As shown in Figure 1, the transformer 2 of Jinshan Substation is a faulty device, the 220kVII bus is a non-faulty power-off device, and the rest of the devices are live running devices, and the live devices are displayed in red on the display. After the power grid fails, start the fault recovery system to search for the power supply path for the non-fault outage equipment. A total of three recovery paths are found, the one-finger switch switch 2200; the two-finger switch switch 2211, 2212; the three-finger switch switch 2221, 2222. The pros and cons of the three paths are evaluated according to the five indicators of the path flow limit rate, switch operation times, bus voltage limit rate, grid loss rate, and grid reserve capacity shown in Table 1, and it is concluded that path 1 is the best path, path 2 is the suboptimal path, as shown in Table 1.

Table 1 Path pros and cons evaluation table

flow limit rate Number of switching operations Bus voltage limit rate Network loss rate Grid reserve capacity MVA Path pros and cons evaluation path one 5% 12 6% 6% 50 optimal path path two 8% 10 8% 6.8% 48 suboptimal path path three 6% 14 10% 7.2% 49 worst path

The three paths are colored and displayed on the display screen respectively. The first path is the optimal path, marked in orange, the second path is the suboptimal path, marked in green, and the third path is the secondary path, marked in blue. At the same time, the switches that need to be operated in the recovery path are blinked, and the switches that need to be blinked are represented by dotted lines in the figure. For the fault described in Figure 1, on the geographical wiring diagram on the display screen (as shown in Figure 2), the substation containing the faulty equipment is marked in red, and only the restoration path between substations is displayed on the geographical wiring diagram, and the location at The restoration path in the substation is shown as path 2 and path 3 in Fig. 2 .

In summary, the graphical grid fault recovery path dynamic display method designed by the present invention effectively solves the problem of how to dynamically display the recovery path on the graphical interface after the fault recovery system finds the recovery path after the grid fault, and different recovery paths are marked differently. The color is convenient for the dispatcher to have an intuitive understanding of the pros and cons of the restoration path. By simulating the fault of the local power grid in a certain area, and searching for the path, the dynamic display of each path on the graphical interface has achieved good results, which verifies the correctness and effectiveness of the graphical power grid fault recovery path dynamic display method.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (1)

1. a graphical network fault recovery path dynamic display method, characterized in that, based on the VC2010 programming tool, the graphical network fault recovery path dynamic display method comprises the steps: 1) Through the fault recovery system, the path search is carried out for the non-fault power outage area after the grid fault; 2) After the search is over, evaluate the pros and cons of each recovery path through the five indicators of path flow limit, switch operation times, bus voltage limit, power grid network loss rate, and power grid reserve capacity; after the path search is completed, Dynamically display the restoration path on the interface of the geographical wiring diagram and the main wiring diagram of the power grid, and at the same time display the calculated information such as the number of switch operations, network loss rate, and limit violation rate of each path, which is convenient for the dispatcher to intuitively understand the restoration path; 3) According to the evaluation results, each recovery path is colored and marked, and the recovery path is dynamically displayed on the graphical interface, including the evaluation index of each recovery path and when the recovery path is dynamically displayed, the switch that needs to be activated during the recovery operation is flickeringly displayed.