CN104734125B - Power grid hybrid line fault processing method and device - Google Patents

Abstract

The invention discloses a fault processing method and device for a hybrid line of a power grid. The fault handling method of the grid hybrid line includes: judging whether the grid hybrid line is faulty; if it is judged that the grid hybrid line is faulty, detecting the fault interval of the grid hybrid line; Fault processing is performed on the detected fault section of the grid hybrid line. The invention solves the problem in the related art that it is difficult to handle the faults of the hybrid lines of the power grid.

Description

Method and device for fault handling of hybrid line in power grid

technical field

The invention relates to the field of power grids, in particular to a method and device for handling hybrid line faults in a power grid.

Background technique

When an accident occurs on a voltage-type line, rely on the function of the terminal itself to realize the isolation of the accident area and load transfer in the non-accident area; when an accident occurs on the current-type line, DAS relies on the fault signal collected from the current-type terminal to make the judgment of the accident area by the DAS system. And give the treatment plan of the isolation of the accident area and the load transfer of the non-accident area. Since there are fundamental differences in the mechanism of accident handling for voltage-type and current-type lines, when voltage-type switches and current-type switches are mixed on a distribution line, it is impossible to use only voltage-type or current-type fault handling methods. Not feasible. For the grid hybrid lines including voltage-type lines and current-type lines, it is difficult to handle faults in the existing technology.

Aiming at the problem in the related art that it is difficult to troubleshoot the hybrid lines of the power grid, no effective solution has been proposed yet.

Contents of the invention

The main purpose of the present invention is to provide a method and device for fault handling of hybrid power grid lines, so as to solve the problem in the related art that it is difficult to handle faults of hybrid power grid lines.

In order to achieve the above purpose, according to one aspect of the present invention, a method for handling faults of hybrid lines in a power grid is provided. The grid hybrid line includes a voltage-type line and a current-type line, and the fault handling method of the grid hybrid line includes: judging whether the grid hybrid line is faulty; if it is judged that the grid hybrid line is faulty, detecting the power grid The fault section of the hybrid line: performing fault processing on the detected fault section of the hybrid line of the power grid according to a preset fault handling strategy.

Further, judging whether the grid hybrid line is faulty includes: detecting the state of the outlet switch in the grid hybrid line; judging whether the outlet switch has tripped, wherein, if it is judged that the outlet switch has tripped, then determining whether the outlet switch has tripped. A fault occurred on the mixed line of the power grid.

Further, judging whether the grid hybrid line is faulty includes: calling the voltage switch in the grid hybrid line; and after calling the voltage switch in the grid hybrid line, judging that the Whether the grid hybrid line is faulty.

Further, before calling the voltage-type switch in the hybrid grid line, the grid hybrid line fault handling method further includes: detecting the state of the outlet switch in the grid hybrid line; judging whether the outlet switch has Tripping; if it is judged that the outlet switch has tripped, it is judged whether the timer in the grid hybrid line has timed out, wherein, if it is judged that the timer in the grid hybrid line has timed out, then the power grid hybrid line The voltage-type switch in the line performs the calling process.

Further, according to the preset fault handling strategy, performing fault processing on the detected fault section of the hybrid line of the power grid includes: first processing the isolation of the fault section according to the voltage type line; and then processing the boundary switch of the fault section Retrieve; and if it is retrieved that there is a current-mode switch in the closed state in the fault zone, the isolation of the fault zone is handled as a current-mode circuit.

In order to achieve the above object, according to another aspect of the present invention, a hybrid line fault processing device of a power grid is provided. The power grid hybrid line includes a voltage type line and a current type line, and the power grid hybrid line fault processing device includes: a first judging unit for judging whether the power grid hybrid line is faulty; a first detection unit for judging When a fault occurs on the hybrid grid line, detect the fault section of the hybrid grid line; and a processing unit, configured to perform fault processing on the detected fault section of the hybrid grid line according to a preset fault handling strategy.

Further, the first judging unit includes: a detection module, configured to detect the state of the outlet switch in the grid hybrid line; a judging module, configured to judge whether the outlet switch has tripped, wherein, if it is judged that the outlet switch If the switch trips, it is determined that the grid hybrid line is faulty.

Further, the first judging unit includes: a calling processing module, configured to perform calling processing on the voltage-type switch in the grid hybrid line; and a judging module, used to call the voltage-type switch in the grid hybrid line After the calling process is performed, it is judged whether the grid hybrid line is faulty.

Further, the device for handling faults of the hybrid grid line further includes: a second detection unit, configured to detect the state of the outlet switch in the grid hybrid line before performing call processing on the voltage type switch in the grid hybrid line; The second judging unit is used to judge whether the outlet switch has tripped; the third judging unit is used to judge whether the timer in the grid hybrid line has timed out after judging that the outlet switch has tripped, wherein, If it is judged that the timer in the hybrid line of the grid has timed out, the voltage type switch in the hybrid line of the grid is called for processing.

Further, the processing unit includes: a first processing unit, which is used to first process the isolation of the fault zone according to the voltage type line; a retrieval unit, which is used to retrieve the boundary switch of the fault zone; a second processing unit, It is used to process the isolation of the fault area according to the current type circuit when the current type switch in the closed state is retrieved in the fault area.

According to the present invention, it is used to judge whether the grid hybrid line is faulty; if it is judged that the grid hybrid line is faulty, then detect the fault interval of the grid hybrid line; The fault processing is performed in the fault interval of the hybrid line of the power grid, which solves the problem in the related art that it is difficult to handle the fault of the hybrid line of the power grid.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

1 is a schematic diagram of a power grid hybrid line fault processing device according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a power grid hybrid line fault processing device according to a preferred embodiment of the present invention;

Fig. 3 is a flow chart of a method for processing a grid hybrid line fault according to an embodiment of the present invention;

Fig. 4 is a flow chart of determining a fault interval of a grid hybrid line according to an embodiment of the present invention; and

Fig. 5 is a flow chart of fault handling of a grid hybrid line according to an embodiment of the present invention.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

Fig. 1 is a schematic diagram of a power grid hybrid line fault processing device according to an embodiment of the present invention.

The grid hybrid lines include voltage-type lines and current-type lines.

As shown in Figure 1, the power grid hybrid line fault processing device includes:

The first judging unit 10 is configured to judge whether the grid hybrid line is faulty.

The first detection unit 20 is configured to detect a fault section of the hybrid grid line when it is determined that a fault occurs in the hybrid grid line.

The processing unit 30 is configured to perform fault processing on the detected fault section of the hybrid grid line according to a preset fault processing strategy.

Through the power grid hybrid line fault processing device in the embodiment of the present invention, it is used to judge whether the power grid hybrid line is faulty; if it is judged that the power grid hybrid line is faulty, then detect the fault interval of the power grid hybrid line; according to the preset The fault processing strategy of the present invention performs fault processing on the detected fault interval of the hybrid line of the power grid, which solves the problem in the related art that it is difficult to handle faults on the hybrid line of the power grid.

In order to improve the accuracy of detection, in one embodiment of the present invention, the first judging unit 10 includes:

The detection module 101 is configured to detect the state of the outlet switch in the grid hybrid line.

The judging module 102 is configured to judge whether the outlet switch has tripped, wherein if it is judged that the outlet switch has tripped, it is determined that the grid hybrid line has a fault.

In an embodiment of the present invention, the first judging unit includes: a call processing module, configured to call a voltage-type switch in the grid hybrid line; After the voltage-type switch in the system performs call processing, it is judged whether the grid hybrid line is faulty.

In an embodiment of the present invention, the device for handling faults in the hybrid grid line further includes: a second detection unit, configured to detect whether the fault in the grid hybrid line is The state of the exit switch; the second judgment unit is used to judge whether the trip of the exit switch occurs; the third judgment unit is used to judge whether the timer in the hybrid line of the power grid after judging that the trip of the exit switch occurs A timeout occurs, wherein, if it is judged that the timer in the hybrid line of the grid is timed out, the voltage type switch in the hybrid line of the grid is called for processing.

In one embodiment of the present invention, the processing unit includes: a first processing unit, configured to first process the isolation of the fault zone according to the voltage type line; a retrieval unit, configured to retrieve the boundary switch of the fault zone; The second processing unit is configured to process the isolation of the faulty section according to the current-type circuit when the current-type switch in the closed state is retrieved in the faulty section.

Fig. 2 is a schematic diagram of a power grid hybrid line fault processing device according to an embodiment of the present invention.

The grid hybrid lines include voltage-type lines and current-type lines.

As shown in Fig. 2, the fault handling method of the grid hybrid line includes:

Step S101, judging whether the grid hybrid line is faulty.

Step S102, if it is determined that the hybrid grid line has a fault, then detect a fault section of the hybrid grid line.

Step S103, performing fault processing on the detected fault section of the hybrid grid line according to a preset fault processing strategy.

Through the fault handling method of the grid hybrid line in the embodiment of the present invention, it is used to judge whether the grid hybrid line is faulty; if it is judged that the grid hybrid line is faulty, then detect the fault interval of the grid hybrid line; according to the preset The fault processing strategy of the present invention performs fault processing on the detected fault interval of the hybrid line of the power grid, which solves the problem in the related art that it is difficult to handle faults on the hybrid line of the power grid.

In one embodiment of the present invention, judging whether the grid hybrid line fails includes: detecting the state of the outlet switch in the grid hybrid line; judging whether the outlet switch trips, wherein, if it is judged that the outlet switch has trip, then it is determined that the grid hybrid line is faulty.

In an embodiment of the present invention, judging whether the grid hybrid line is faulty includes: performing call processing on the voltage switch in the grid hybrid line; and performing call processing on the voltage switch in the grid hybrid line Afterwards, it is judged whether the grid hybrid line fails.

In an embodiment of the present invention, before calling the voltage-type switch in the hybrid line of the power grid, the method for handling the fault of the hybrid line of the power grid further includes: detecting the state of the outlet switch in the hybrid line of the power grid; Whether the outlet switch is tripped; if it is judged that the outlet switch is tripped, then judge whether the timer in the hybrid line of the power grid is timed out, wherein, if it is judged that the timer in the hybrid line of the power grid is timed out, then Call processing is performed on the voltage-type switch in the hybrid line of the power grid.

In an embodiment of the present invention, performing fault processing on the detected fault section of the hybrid line of the power grid according to a preset fault processing strategy includes: first processing the isolation of the fault section according to the voltage type line; Retrieve the boundary switch of the fault zone; and if the fault zone has a closed state current-type switch, the isolation of the fault zone is processed according to the current-type circuit.

The fault interval (also referred to as accident interval) determination and fault handling methods of the embodiment of the present invention will be introduced below.

1. Determination of fault interval

Fig. 4 is the flow chart of the judgment of the fault interval of the hybrid line of the power grid according to the embodiment of the present invention. Referring to Fig. 4, the following methods can be used for fault judgment:

State change processing, the system updates the corresponding device online library status according to the terminal signal status, including switch on/off status, switch fault status, etc., and performs charging and power-off coloring on the system according to the topology relationship.

When the exit switch trips, the judgment of the hybrid line is carried out. The judgment of the hybrid line is based on the voltage-type automatic switch within the power outage range. When it is judged as a hybrid line, apply for the "accident secondary judgment timer" and "final state judgment timer". ", and carry out accident judgment. The judgment is based on the protection action signal of the exit switch or the general signal of the substation accident.

When the exit switch is closed, if there is a voltage-type automatic switch within the charging range, a signal call timer is applied, and the time of the timer is accumulated by the X time limit of the voltage-type switch on the line.

When the secondary judgment timer of the accident is overtime, the accident judgment process is carried out again, and the judgment is based on the protection action signal of the exit switch or the general signal of the substation accident. (Because the protection signal may be slower than the trip signal, if the judgment is made during tripping, the correct result may not be obtained, so it needs to be delayed for a few seconds to make another judgment)

When the signal call timer expires, the signal call processing is performed on the voltage type switch on the load side of the main cause switch. After the call processing is completed, determine whether an accident has occurred in the distribution line. If an accident occurs, find out the voltage type switch lock interval range . If the current-type automatic switch is included in the blocking interval, apply for the accident interval determination timer (the timer time is determined by the terminal type of the current-type switch); if not, set the blocking interval as the accident interval and update the accident information.

When the accident section determination timer times out, the accident section is found out according to the fault signal of the current type switch on the load side of the main cause switch, and the accident information is updated.

When the final state judgment timer times out, if the accident state of the line where the switch is located is in the unjudged stage of the accident interval, set the blackout range of the main cause switch as the accident interval and update the accident information. (The state of avoiding accidents is always in the state of undetermined accident interval)

2. Troubleshooting

Fig. 5 is a flow chart of fault handling of a grid hybrid line according to an embodiment of the present invention. As shown in Figure 5, the grid hybrid line fault handling in the embodiment of the present invention can take the following methods:

After the accident area is judged successfully, the process of fault handling includes the isolation of the accident area, the transfer of power supply to the non-accident blackout area, and the process of restoring power supply to the accident area after the accident area is released.

Isolation of accident intervals: Based on the characteristics of automatic isolation of fault intervals by voltage-type switches, the isolation of accident intervals of hybrid lines is firstly handled as voltage-type lines, that is, the voltage-type switches are used to isolate major accident intervals; There is a current-mode switch in closed state at the boundary of the interval, indicating that the accident interval is on the load side of the current-mode switch, and this current-mode switch needs to be further used to isolate the accident interval.

Load transfer: Load transfer first determines the section to be transferred, and searches whether there is a transfer path. If there is a possible transfer path, start the load transfer algorithm to generate a transfer strategy.

Operation ticket processing: The generated transfer strategy includes voltage-type and current-type switch operation tickets. According to the different action characteristics of voltage and current switches, the operation tickets need to be regrouped and edited. For the same current type switch, delete the operation tickets that have both "close operation" and "open operation"; Voltage-type switch operation ticket principle reordering.

Accident recovery power supply: After the accident zone is released, the recovery power supply priority of the accident zone is transferred to the contact switch on the power supply side to ensure that the power supply of this line is preferentially used; A recovery strategy for returning to the pre-incident system.

It should be noted that the steps shown in the flowcharts of the accompanying drawings may be performed in a computer system, such as a set of computer-executable instructions, and that although a logical order is shown in the flowcharts, in some cases, The steps shown or described may be performed in an order different than here.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Optionally, they can be implemented with program codes executable by computing devices, thus, they can be stored in storage devices and executed by computing devices, or they can be made into individual integrated circuit modules, or they can be integrated into Multiple modules or steps are fabricated into a single integrated circuit module to realize. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A method for handling a fault of a grid hybrid line, characterized in that, the grid hybrid line includes a voltage-type line and a current-type line, and the grid hybrid line fault handling method comprises: judging whether the grid hybrid line is faulty; If it is determined that the grid hybrid line is faulty, detecting a fault section of the grid hybrid line; and Perform fault processing on the detected fault section of the grid hybrid line according to a preset fault processing strategy; Wherein, before judging whether the grid hybrid line is faulty, update the corresponding equipment online library status according to the terminal signal status, and perform charging and power-off coloring for the system according to the topological relationship. 2. The method for processing faults of hybrid power grid lines according to claim 1, wherein judging whether a fault occurs in the hybrid power grid lines comprises: Detecting the state of the outlet switch in the grid hybrid line; judging whether the exit switch has tripped, Wherein, if it is judged that the outlet switch has tripped, it is determined that the grid hybrid line has a fault. 3. The method for processing faults of hybrid grid lines according to claim 1, wherein judging whether a fault occurs in the grid hybrid lines comprises: Summoning voltage-mode switches in said grid hybrid line; and After the calling process is performed on the voltage-type switch in the grid hybrid line, it is judged whether the grid hybrid line has a fault. 4. The grid hybrid line fault handling method according to claim 3, characterized in that, before the voltage-type switch in the grid hybrid line is called for processing, the grid hybrid line fault handling method further comprises: Detecting the state of the outlet switch in the grid hybrid line; judging whether the exit switch trips; If it is judged that the outlet switch has tripped, it is judged whether the timer in the grid hybrid line times out, Wherein, if it is judged that the timer in the grid hybrid line times out, the voltage type switch in the grid hybrid line is called for processing. 5. The grid hybrid line fault processing method according to claim 1, wherein, according to a preset fault processing strategy, performing fault processing on the detected fault interval of the grid hybrid line comprises: The isolation of the fault zone is firstly processed according to the voltage type line; Retrieving the boundary switch of the fault zone; and If there is a current-type switch in the closed state in the fault zone, the isolation of the fault zone is handled as a current-type circuit. 6. A power grid hybrid line fault processing device, characterized in that, the power grid hybrid line includes a voltage type line and a current type line, and the power grid hybrid line fault processing device includes: a first judging unit, configured to judge whether a fault occurs in the grid hybrid line; A first detection unit, configured to detect a fault section of the grid hybrid line when it is determined that a fault occurs in the grid hybrid line; and A processing unit, configured to perform fault processing on the detected fault interval of the hybrid grid line according to a preset fault processing strategy; Wherein, before judging whether the grid hybrid line is faulty, update the corresponding equipment online library status according to the terminal signal status, and perform charging and power-off coloring for the system according to the topological relationship. 7. The power grid hybrid line fault processing device according to claim 6, wherein the first judging unit comprises: A detection module, configured to detect the state of the outlet switch in the grid hybrid line; A judging module, configured to judge whether the outlet switch has tripped, wherein if it is judged that the outlet switch has tripped, it is determined that the grid hybrid line has a fault. 8. The power grid hybrid line fault processing device according to claim 6, wherein the first judging unit comprises: A call processing module, configured to perform call processing on the voltage switch in the grid hybrid line; and A judging module, configured to judge whether a fault occurs in the grid hybrid line after calling the voltage-type switch in the grid hybrid line. 9. The power grid hybrid line fault processing device according to claim 8, characterized in that, the power grid hybrid line fault processing device further comprises: The second detection unit is used to detect the state of the outlet switch in the grid hybrid line before calling the voltage switch in the grid hybrid line; a second judging unit, configured to judge whether the exit switch trips; The third judging unit is configured to judge whether the timer in the grid hybrid line has timed out after judging that the outlet switch has tripped, wherein, if it is judged that the timer in the grid hybrid line has timed out, then Call processing is performed on the voltage-type switch in the hybrid line of the power grid. 10. The power grid hybrid line fault processing device according to claim 6, wherein the processing unit comprises: The first processing unit is used to first process the isolation of the fault zone according to the voltage type line; a retrieval unit, configured to retrieve the boundary switches of the faulty section; and The second processing unit is configured to process the isolation of the faulty section according to the current-type circuit when the current-type switch in the closed state is retrieved in the faulty section.