CN112421612B - Medium-voltage main line branch line analysis method based on distribution network operation state - Google Patents
Medium-voltage main line branch line analysis method based on distribution network operation state Download PDFInfo
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Abstract
The invention discloses a medium-voltage main line branch line analysis method based on a distribution network running state, which comprises the steps of obtaining primary equipment information of a feeder line of a main line branch line to be analyzed at present, constructing a static topological structure of the feeder line to be analyzed according to topological connection points of the primary equipment, and obtaining power supply bus data, feeder line data and the on-off state of a switching-on device and the switching-off state of the switching-off device from the static topological structure; according to the feeder automation data and the operation ticket data, acquiring remote signaling disconnection running time of the disconnection equipment in a time interval; calculating the remote signaling disconnection operation rate of the disconnection equipment on each feeder line; according to the remote signaling disconnection operation rate, acquiring disconnection equipment serving as a tie switch; and acquiring a main line and a branch line in the static topological structure according to the interconnection switch. The medium-voltage trunk line branch line analysis method based on the distribution network running state can avoid the problems that the trunk/branch line analysis fails due to the quality problem of the model, the related application cannot be normally used and the like to the maximum extent.
Description
Technical Field
The invention relates to a distribution network operation state-based medium-voltage main line branch line analysis method, and belongs to the technical field of power grid model analysis.
Background
The method has the advantages that the main line and the branch line are correctly analyzed, and the method plays an important role in analyzing the running state of the power grid, positioning and recovering faults, analyzing the power distribution of the branch, analyzing the power loss of the network and the like. And the basis of the main/branch line analysis mainly depends on the integrity and correctness of the power grid model.
The power grid model is a digital description of an objective power grid structure, and the power grid network model is the basis of power system software analysis. The power distribution network model is mainly imported from a Geographic Information System (GIS) or a Production Management System (PMS) and spliced with an Energy Management System (EMS) scheduling model, and partial projects are constructed in a manual maintenance mode, so that the problems of low power distribution network model quality, disordered topology connection, incomplete equipment attribute maintenance and the like exist on the whole. When the trunk line and the branch line are analyzed according to the standard, the trunk/branch line information cannot be acquired or the trunk line and the branch line path are not consistent with the real path.
Currently, the analysis of the main lines and branch lines of the medium voltage distribution network is mainly based on the static topology of the electrical equipment and the type and attributes of the electrical equipment. The existing analysis method has the advantages that the trunk/branch line analysis method is simple and rapid, but the basic data quality is required to be accurate, the equipment attribute is complete, and the quality of models in various cities is different when the current power distribution network is rapidly developed. For the development direction of the current smart power grid, the original analysis method is increasingly incapable of supporting the analysis method of the trunk line and the branch line of the complex medium-voltage distribution network.
A main line: the shortest path between the medium voltage line to the contact equipment. The power transmission system is a line which has the largest power transmission capacity and the highest voltage level or is the most critical line in the power transmission system, and bears the functions of main power transmission and the support and the connection of the power grid, once the power transmission system is damaged, the power grid can be cracked, normal power transmission is hindered, and large-area power failure occurs. Branching: refers to a branch of a main line in a power transmission system.
Disclosure of Invention
The purpose is as follows: in order to overcome the defects in the prior art, the invention provides a medium-voltage trunk line branch line analysis method based on the distribution network operation state.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a distribution network operation state-based medium-voltage main line branch line analysis method comprises the following steps:
step 1: the method comprises the steps of obtaining primary equipment information of a feeder line of a current main line branch line to be analyzed, constructing a static topological structure of the feeder line to be analyzed according to topological connection points of the primary equipment, and obtaining power supply bus data, feeder line data and the on-off state of a cut-off device from the static topological structure.
Step 2: and acquiring remote signaling disconnection running time of the disconnection equipment in a time interval according to the feeder automation data and the operation ticket data.
And step 3: and calculating the remote signaling disconnection operation rate of the disconnection equipment on each feeder line.
And 4, step 4: and acquiring the on-off equipment of the interconnection switch according to the remote signaling off operation rate.
And 5: and acquiring a main line and a branch line in the static topological structure according to the interconnection switch.
As a preferred scheme, the static topology structure adopts a ring network static topology structure.
Preferably, the step 2 comprises the following specific steps:
2.1 setting time intervals, and acquiring feeder automation data and operation ticket data;
2.2, searching for the remote signaling disconnection running time and the remote signaling closing running time of the disconnection equipment in the feeder automation data and the operation ticket data;
2.3 if the cut-off equipment is cut off due to a fault, reducing the remote signaling cut-off running time of the cut-off equipment to be the closed running time, wherein the remote signaling cut-off running time of the cut-off equipment is the sum of the original closed running time and the reduced closed running time subtracted by the time interval;
2.4 if the switching-off equipment is switched on due to switching-over supply, the telecommand switching-on operation time of the switching-off equipment is reduced to be switching-off operation time, and the telecommand switching-off operation time of the switching-off equipment is the sum of the original switching-off operation time and the reduced switching-off operation time.
Preferably, the remote signaling disconnection operation rate calculation formula is as follows:
wherein X represents a remote signaling disconnection operation rate.
Preferably, the step 4 comprises the following steps:
4.1, acquiring equipment with the maximum remote signaling disconnection operation rate of disconnection equipment on the topological structure;
4.2 if the number of the equipment is 1, directly judging that the equipment is a communication switch;
4.3 if the number of the equipment is multiple, judging whether the equipment has a transfer scheme in the feeder automation scheme or the type of the equipment is an interconnection switch, and judging that the equipment is the interconnection switch;
4.4 if the number of the equipment is multiple and the equipment does not accord with the judgment rule of 4.3, selecting the equipment far away from the power supply bus as a communication switch;
4.5 if the number of the devices is multiple and the judgment rule is not satisfied, one device is selected to be the interconnection switch.
Preferably, the step 5 comprises the following steps:
and obtaining a feeder line between the power supply bus and the interconnection switch as a main line, wherein the feeder line connected with the main line is a branch line.
Has the advantages that: the invention provides a distribution network operation state-based medium-voltage main line branch line analysis method which is based on the quality of a current medium-voltage configuration model, and by introducing feeder automation data and operation ticket data to be combined with each other, basic analysis data are enriched, remote signaling deflection information caused by faults, overhaul, switching supply and the like is recovered, the switching-off weight on each power supply path is calculated, contact equipment is judged again, and a main line/branch line topological path is analyzed.
The invention improves the analysis method of the trunk line and the branch line, adopts the standard analysis method to be mutually combined with FA (feeder automation), the remote signaling state of the cut-off equipment and the hierarchical relation of the equipment, enriches the basic analysis data, and further improves the quality of the branch result of the trunk/branch line, so that the problems that the analysis of the trunk/branch line fails due to the quality problem of the model, the related application cannot be normally used and the like can be avoided to the maximum extent.
Drawings
Fig. 1 is a static topology structure diagram.
Fig. 2 is a state diagram of a pre-fault topology.
Fig. 3 is a topology state diagram after fault isolation and transition.
Fig. 4 is a power supply bus-bar topological path diagram.
Fig. 5 is a diagram of remote signaling disconnection operation rate of a topological path between power supply buses.
Fig. 6 is a trunk branch line calculation chart.
Detailed Description
The present invention will be further described with reference to the following examples.
A distribution network operation state-based medium-voltage main line branch line analysis method comprises the following steps:
Obtaining primary equipment information of a feeder line of a current trunk line branch line to be analyzed, and constructing a ring network static topological structure of the feeder line to be analyzed according to topological connection points of the primary equipment. As shown in fig. 1, the ring network topology structure includes 2 feeders, a feeder a and a feeder B, which are respectively powered by a power supply bus 1 and a power supply bus 2, and remote signaling states of the switching devices (such as a circuit breaker and a disconnecting link) on the topology path are all default to a closed state.
As shown in fig. 2-3, step 2, feeder automation data, data recovery of operation ticket data.
According to 2 feeders of a ring network static topological structure, 2 feeders in a set time interval (the time interval is configured according to actual conditions on site, and the accuracy is higher when the time span is larger) are acquired from a database, all feeder automation data and operation ticket data which are associated with the on-off equipment in the 2 feeders are related, the telecommand closing operation time and the telecommand opening operation time of the on-off equipment in the time interval are calculated according to the time interval, and reduction is carried out according to the feeder automation data and the operation ticket data attributes. Specifically, the data to be restored are processed as follows:
feeder automation data:
(1) For a feeder automation scheme, the open and close run times of the disconnect equipment caused by executing the automation remote control scheme are restored according to the remote signaling operation of the disconnect equipment in the scheme, for example: in the fault isolation transfer scheme: setting the time interval as 2019, 08 months and 08 days 0:00-24:00, time interval 24 hours, fault isolation transfer scheme execution time occurs at 2019, 08/10 min. The fault isolation transfer recovery execution time is as follows: 13/08/2019, month 08, 10 points. The isolation scheme cut-off devices 1-2 and 1-3 are remotely signaled to be cut-off for 2 hours and 20 minutes, and the cut-off devices are cut off due to faults according to the feeder automation data, so that the cut-off operation time is restored to be the closed operation time, namely, the cut-off devices do not have cut-off operation, and the remote signaling cut-off operation time is 0 hour. And the 1-5 remote signaling on-off equipment of the isolation switching-supply scheme has the on-off running time of 2 hours and 20 minutes, and according to the feeder automation data, the on-off of the on-off equipment is caused by switching supply, so the on-off running time is reduced to the off-off running time, namely the on-off equipment does not have the on-off running, the remote signaling off-off running time is 24 hours, and the operation times of the remote signaling states of the on-off equipment, which are influenced by all the feeder automation schemes in a time interval, are sequentially reduced.
Operating ticket data:
(1) And screening out operation tickets with the changed remote signaling states of the cut-off equipment according to the types of the operation tickets, obtaining the remote signaling state running time according to the starting time and the ending time of the operation tickets, influencing all the operation tickets in a time interval, and sequentially restoring the remote signaling state running time of the cut-off equipment corresponding to the isolation or conversion of the types of the operation tickets.
As shown in fig. 4-5, step 3, the determination of the tie switch is made for the disconnected device.
And on the basis of the characteristic that the interconnection switch is positioned on a topological path between different power supply buses, all switching-off equipment with remote signaling on the topological path between the feeder line A and the feeder line B are found out. According to the time results of the remote signaling closed operation and the remote signaling open operation in the step 2, calculating the remote signaling open operation rate of each open-close device, wherein the calculation formula is as follows:
x represents the remote signaling off duty.
Updating the calculation result to the corresponding cut-off equipment, for example, X =0 of cut-off equipment 1-1, X =0 of 1-2, X =0 of X =0.3 of X =1 of 1-4, X =0 of X =1,1-5 of X =0 of 1,1-6, X =0 of 1-7, acquiring the equipment with the maximum remote signaling cut-off operation rate of the cut-off equipment on the topology according to the calculation result, and if the acquired equipment number is unique, directly judging that the switch has the contact switch attribute in the current time interval; if a plurality of devices with the maximum remote signaling disconnection operation rate exist, judging whether the devices with the same operation rate exist in a transfer scheme or the type of the switch is an interconnection switch in the feeder automation scheme, and judging that the disconnection devices are the interconnection switches. If the auxiliary judgment information is not available, the communication switch which is far away from the power supply bus is selected. If none of the above conditions is satisfied, then one of the two is selected to be a tie switch. And judging that the on-off equipment 1-5 is an interconnection switch according to the calculation result of the on-line method.
As shown in fig. 6, step 4, trunk and branch path analysis.
And (3) calculating and judging the result of the interconnection switch according to the flow 3, and searching rules according to the branch line of the main line, namely, the feeder line from the power supply bus to the interconnection switch is the main line, the feeder line connected with the main line is the branch line, the main lines 1-1 to 1-4 are the main line of the feeder line A, the branch line path from 1-10 to the tail end of the feeder line A, the main line from 1-7 to 1-6 are the feeder line B, and the branch line path from 1-8 to the tail end of the feeder line B.
Through the steps of the method, the problem of the route error analysis of the trunk branch line caused by wrong equipment attributes, unclear contact identifiers, disordered equipment hierarchical relation and the like can be solved, the topological route of the trunk branch line can be accurately found, and the current power grid operation state can be truly reflected.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (2)
1. A medium-voltage main line branch line analysis method based on a distribution network operation state is characterized in that: the method comprises the following steps:
step 1: obtaining primary equipment information of a feeder line of a main line branch line to be analyzed currently, constructing a static topological structure of the feeder line to be analyzed according to topological connection points of the primary equipment, and obtaining power supply bus data, feeder line data and the on-off state of a switching-on and switching-off device from the static topological structure;
and 2, step: according to the feeder automation data and the operation ticket data, acquiring remote signaling disconnection running time of the disconnection equipment in a time interval;
and 3, step 3: calculating the remote signaling disconnection operation rate of the disconnection equipment on each feeder line;
and 4, step 4: according to the remote signaling disconnection operation rate, acquiring disconnection equipment serving as a tie switch;
and 5: acquiring a main line and branch lines in the static topological structure according to the interconnection switch;
the step 2 comprises the following specific steps:
2.1 setting time intervals, and acquiring feeder automation data and operation ticket data;
2.2, searching for the remote signaling disconnection running time and the remote signaling closing running time of the disconnection equipment in the feeder automation data and the operation ticket data;
2.3 if the cut-off equipment is cut off due to a fault, reducing the remote signaling cut-off running time of the cut-off equipment to be the closed running time, wherein the remote signaling cut-off running time of the cut-off equipment is the sum of the original closed running time and the reduced closed running time subtracted by the time interval;
2.4 if the switching-off equipment is switched on due to switching-over supply, reducing the telecommand switching-on operation time of the switching-off equipment to be switching-off operation time, wherein the telecommand switching-off operation time of the switching-off equipment is the sum of the original switching-off operation time and the reduced switching-off operation time;
the remote signaling disconnection operation rate calculation formula is as follows:
wherein X represents a remote signaling disconnection operation rate;
the step 4 comprises the following specific steps:
4.1, acquiring equipment with the maximum remote signaling disconnection operation rate of disconnection equipment on the topological structure;
4.2 if the number of the devices is 1, directly judging the devices as interconnection switches;
4.3 if the number of the equipment is multiple, judging whether the equipment has a transfer scheme in the feeder automation scheme or the type of the equipment is an interconnection switch, and judging that the equipment is the interconnection switch;
4.4 if the number of the equipment is multiple and the equipment does not accord with the judgment rule of 4.3, selecting the equipment far away from the power supply bus as a communication switch;
4.5 if the number of the devices is multiple and the judgment rules are not met, selecting one device as an interconnection switch;
the step 5 comprises the following steps:
and obtaining a feeder line between the power supply bus and the interconnection switch as a main line, wherein the feeder line connected with the main line is a branch line.
2. The method for analyzing the branch line of the medium-voltage trunk line based on the distribution network operation state according to claim 1, characterized in that: the static topological structure adopts a ring network static topological structure.
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