CN109149534B - Method for rapidly diagnosing topological fault of power grid model based on DTS virtual switch - Google Patents

Abstract

The invention discloses a method for rapidly diagnosing topological faults of a power grid model based on a DTS virtual switch, which comprises the following steps of: 1) configuring a line model and designing a virtual switch; 2) when a fault occurs, firstly checking a fault range; 3) if the fault point is in the dispatching range of other companies, switching to a DTS virtual switch circuit diagram, pulling the virtual switch open, determining whether the fault point is in the control range of the virtual switch, if so, notifying a corresponding dispatching department, and removing the fault; 4) if the fault point is not in the control range of the virtual switch, repeating the step 3) until the fault point is found; 5) if the plant station line graph is in the dispatching range of the company, the plant station line graph in the dispatching range is opened, the plant station line graph is switched to DTS application, fault points are judged through manual setting one by one, fault reasons are searched, and related departments are notified to maintain after troubleshooting is completed. The method can quickly diagnose the topological fault of the model and reduce the accidents of voltage regulation failure and distribution network self-healing failure.

Description

Method for rapidly diagnosing topological fault of power grid model based on DTS virtual switch

Technical Field

The invention relates to a power grid topology fault diagnosis method, in particular to a method for rapidly diagnosing power grid model topology faults based on a DTS virtual switch.

Background

The power grid model topology is an important ring in the dispatching control work of the power system, and in the power dispatching control work, whether the power grid model topology in the power monitoring system is correct or not is related to the reliability and safety of the whole power grid work. The DTS is a power dispatching training simulation system, data of the DTS can be acquired from a power data acquisition network in real time, primary equipment in a transformer substation cannot be controlled in real time, the DTS is suitable for diagnosing power grid model topology, and no influence is caused on actual operation of a power grid.

The topological relation of the power grid model supports multiple service functions such as AVC, PAS, state estimation, load flow calculation and the like on a basic platform of the power monitoring system, and when the power grid model topology breaks down, the AVC function, the distribution network self-healing function and the like of the whole power monitoring system lose the functions and quit operation. With the increasingly rapid construction of a power grid and the increasingly complex form of the model topological relation, the occurrence rate of the model topological fault is higher and higher, and the difficulty in diagnosing the position of the topological fault is higher and higher, so that the rapid search and elimination of the fault become a difficult test.

Most of the power grid model topology faults are electrical equipment position abnormal faults, and most of the faults are caused by the fact that a grounding knife switch is in a remote signaling position error or a manual setting error is conducted on the grounding knife switch. The substation or line which is required to be judged to have the fault needs to have certain scheduling control authority, and the scheduling authority of some substations is in other brother companies and is not in the company at present. Therefore, the difficulty of searching the power grid topology power-loss fault is greatly increased, and the time for searching the fault is greatly prolonged. In the process of finding faults in this stage, if AVC voltage regulation exists or the distribution network self-healing starts, accidents of voltage regulation failure and distribution network self-healing failure can occur.

Applications such as SCADA (supervisory control and data acquisition), FES (field emission spectroscopy) and the like in an I area in an electric power monitoring system are used for real-time monitoring and data analysis, model topologies under the applications are consistent with a principle of primary equipment, and if the model topologies are different from equipment in a transformer substation, misoperation can be caused when equipment in a dispatching control center is operated or commands are issued to the equipment in the substation.

Disclosure of Invention

The invention aims to solve the technical problems and provides a method for rapidly diagnosing the power grid model topology fault based on a DTS virtual switch, which can rapidly diagnose the model topology fault.

In order to solve the technical problems, the invention adopts the following technical scheme:

a method for rapidly diagnosing topological faults of a power grid model based on a DTS virtual switch comprises the following steps:

1) configuring a line model: firstly, drawing a circuit diagram in a graph editor of a power monitoring system, wherein an electrical connection line part between a circuit breaker 1 and a circuit breaker 2 is primary actual equipment, the application of the circuit diagram is selected to be other applications except DTS in attribute editing, a connection part with a virtual switch is non-actual equipment, the application of the circuit diagram is selected to be a research state of DTS application in attribute editing, and the application attributes of other equipment primitives in the diagram are set to be all applications;

2) when a power grid model topological fault occurs, firstly checking a fault range, and preliminarily judging whether the topological fault is in the dispatching range of other companies;

3) if the topological fault is in the dispatching range of other companies, switching to a DTS virtual switch circuit diagram, pulling a virtual switch open, determining whether a fault point is in the control range of the virtual switch, and if the fault point is in the range of the virtual switch, contacting with a corresponding dispatching department to ask the dispatching department to remove the fault;

4) if the fault point is not in the virtual switch control range, repeating the step 3) until the fault point is found;

5) if the topological fault is in the dispatching range of the company, a plant station circuit diagram in the dispatching range of the company is opened, the DTS application is switched, fault points are judged through manual setting one by one, fault reasons are searched, and related departments are notified to maintain after the troubleshooting is completed.

The invention has the beneficial effects that:

1. and the AVC correct action rate can be improved by quickly removing the topology fault.

2. And the success rate of the self-healing function of the distribution network can be improved by quickly removing the topological fault.

3. And rapidly solving the problem of state estimation non-convergence.

4. And a virtual switch is added in the DTS application, so that the inconsistency between the real-time application and the equipment ledger record can be avoided.

5. And the remote control misoperation risk under the SCADA application is avoided.

Drawings

FIG. 1 is a wiring diagram of a virtual switch circuit under full application;

FIG. 2 is a schematic diagram of a virtual switch under SCADA application;

FIG. 3 is a schematic diagram of a virtual switch under DTS application;

fig. 4 is a flowchart of a method for rapidly diagnosing a topology fault of a power grid model based on a DTS virtual switch according to the present invention.

Detailed Description

The invention is described in further detail below with reference to the following figures and detailed description:

the method needs a circuit diagram (figure 1), clearly configures the application range of the circuit diagram, uses the figure 2 to carry out daily work during regulation and control operation, and uses the figure 3 during searching for topological faults so as to achieve the aim of rapidly removing the faults.

Firstly, a circuit diagram is drawn in a power monitoring system graphic editor, as shown in fig. 1. In fig. 1, the electrical connection line between the circuit breaker 1 and the circuit breaker 2 is a primary actual device, and the application is selected as an application other than the DTS in the property editing; and the connecting part with the virtual switch is non-actual equipment, and the application is selected as a research state of the DTS application in the attribute editing. The attribute of the other equipment elements in the graph is set as all the application. With the above configuration, we can see the circuit diagram from the research state of the DTS application, as shown in fig. 3; the layout is seen in other applications such as SCADA, PAS, AVC, etc., as shown in fig. 2.

After the line model is configured, the fault diagnosis can be performed according to the method in the flowchart shown in fig. 4, in the method, the lines are disconnected one by using the virtual switches through an enumeration elimination method to perform fault point troubleshooting, in the method, the setting operation is performed through the DTS research state model, and the real-time monitoring service of the power monitoring system cannot be influenced.

When the power grid model topology fault occurs, the following method is adopted to achieve the purpose of rapidly removing the fault.

1. Firstly, checking a fault range, and preliminarily judging whether the topology fault is in the dispatching range of other companies.

2. If the topological fault is in the dispatching range of other companies, switching to a DTS virtual switch circuit diagram, pulling the virtual switch open, determining whether the fault point is in the control range of the virtual switch, and if the fault point is in the control range, contacting with a corresponding dispatching department to require the fault point to be removed.

3. And if the fault point is not in the virtual switch control range, repeating the step 2 until the fault point is found.

4. If the topological fault is in the dispatching range of the company, a plant station circuit diagram in the dispatching range is opened, the plant station circuit diagram is switched to DTS application, fault points are judged through manual setting one by one, fault reasons are searched, and related departments are notified to maintain after the troubleshooting is completed.

The virtual switch is deployed in a research state of DTS application, so that the actual model topology is not influenced in the using process of the switch, and the aims of quickly diagnosing the topology fault of the model and reducing the accidents of voltage regulation failure and distribution network self-healing failure can be fulfilled by a series of operation methods of the virtual switch.

In summary, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can propose other embodiments within the technical teaching of the present invention, but these embodiments are included in the scope of the present invention.

Claims (1)

1. A method for rapidly diagnosing topological faults of a power grid model based on a DTS virtual switch is characterized by comprising the following steps:

1) configuring a line model: firstly, drawing a circuit diagram in a graph editor of a power monitoring system, wherein an electrical connection line part between a circuit breaker 1 and a circuit breaker 2 is primary actual equipment, the application of the circuit diagram is selected to be other applications except DTS in attribute editing, a connection part with a virtual switch is non-actual equipment, the application of the circuit diagram is selected to be a research state of DTS application in attribute editing, and the application attributes of other equipment primitives in the diagram are set to be all applications;

2) when a power grid model topological fault occurs, firstly checking a fault range, and preliminarily judging whether the topological fault is in the dispatching range of other companies;

3) if the topological fault is in the dispatching range of other companies, switching to a DTS virtual switch circuit diagram, pulling a virtual switch open, determining whether a fault point is in the control range of the virtual switch, and if the fault point is in the range of the virtual switch, contacting with a corresponding dispatching department to ask the dispatching department to remove the fault;

4) if the fault point is not in the virtual switch control range, repeating the step 3) until the fault point is found;

5) if the topological fault is in the dispatching range of the company, a plant station circuit diagram in the dispatching range of the company is opened, the DTS application is switched, fault points are judged through manual setting one by one, fault reasons are searched, and related departments are notified to maintain after the troubleshooting is completed.

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