CN110336276B - Analysis and recording method and device for loop closing and opening process of distribution line - Google Patents
Analysis and recording method and device for loop closing and opening process of distribution line Download PDFInfo
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- CN110336276B CN110336276B CN201910620896.6A CN201910620896A CN110336276B CN 110336276 B CN110336276 B CN 110336276B CN 201910620896 A CN201910620896 A CN 201910620896A CN 110336276 B CN110336276 B CN 110336276B
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- opening process
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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- Engineering & Computer Science (AREA)
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Abstract
The invention relates to the technical field of power system automation, and particularly discloses an analysis and recording method for a distribution line loop closing and opening process, wherein the analysis and recording method for the distribution line loop closing and opening process comprises the following steps: acquiring a loop closing operation switch; constructing a loop model according to the loop closing operation switch; checking the consistency of a main transformer wiring group in a loop model; if the main transformer wiring groups on the two sides of the loop closing circuit are consistent, verifying data before loop closing; if the data check before the loop closing is passed, monitoring the loop closing and opening process; and analyzing and recording the data of the ring opening process. The invention also discloses an analysis and recording device for the loop closing and opening process of the distribution line. The analysis and recording method for the loop closing and opening process of the distribution line, provided by the invention, can reduce the operation of dispatching personnel, provide an auxiliary decision and provide historical measured data support for loop closing impact current calculation.
Description
Technical Field
The invention relates to the technical field of power system automation, in particular to an analysis and recording method and an analysis and recording device for a loop closing and opening process of a distribution line.
Background
At present, in order to reduce the power failure time and improve the power supply reliability, a common means of power supply enterprises is provided by adopting a loop closing operation without power failure during line maintenance and load shedding.
Because the electric quantity, the loop closing station, the transformer wiring group, the bus, the outgoing line and the like which need to be monitored are numerous in the loop closing and opening process, and the distribution network model and the operation mode are complex, the electric quantity information which needs to be paid attention to is difficult to obtain quickly in the loop closing and opening process, in addition, the loop closing impact current calculation is also a difficult problem, and a certain historical data support can be provided for the loop closing impact current analysis through the storage of the current data in the loop closing process.
Disclosure of Invention
The present invention is directed to solve at least one of the technical problems in the prior art, and provides an analysis and recording method and an analysis and recording apparatus for a loop closing and opening process of a distribution line, so as to solve the problems in the prior art.
As a first aspect of the present invention, there is provided an analyzing and recording method for a distribution line loop closing and opening process, wherein the analyzing and recording method for a distribution line loop closing and opening process includes:
acquiring a loop closing operation switch;
constructing a loop model according to the loop closing operation switch;
checking the consistency of a main transformer wiring group in a loop model;
if the main transformer wiring groups on the two sides of the loop closing circuit are consistent, verifying data before loop closing;
if the data check before the loop closing is passed, monitoring the loop closing and opening process;
and analyzing and recording the data of the ring opening process.
Preferably, the building of the loop model according to the closed-loop operation switch includes:
acquiring the state of a closed-loop operation switch in real time;
acquiring power supply points on two sides of a closed loop operation switch;
analyzing a substation outgoing line corresponding to power points on two sides of the closed-loop operation switch and a bus main transformer corresponding to the substation outgoing line;
and analyzing a switch set of the closed loop circuit according to the outgoing line of the transformer substation and the main transformer of the bus.
Preferably, the checking the consistency of the main transformer wiring sets on both sides of the loop closing circuit comprises:
acquiring a wiring group of a low-voltage side winding of the bus main transformer;
judging whether the wiring groups are consistent or not;
if the connection groups are consistent, a step of verifying the data before loop closing is executed;
and if the wiring group is not consistent, stopping analysis of the ring closing and opening process.
Preferably, the verifying the pre-closing data comprises:
acquiring main transformer low-voltage side current and bus voltage on two sides of a loop closing operation switch;
calculating the load difference of a main transformer and the voltage difference of a bus;
judging whether the main transformer load difference is greater than a first preset limit value or not and whether the bus voltage difference is greater than a second preset limit value or not;
if the load difference of the main transformer is not greater than a first preset limit value and the voltage difference of the bus is not greater than a second preset limit value, judging that the data check before the loop closing is passed;
otherwise, prompting whether to finish the analysis of the ring closing and opening process to the user.
Preferably, the performing a loop closing and opening process monitoring comprises:
and counting the current power of the loop closing circuit before loop closing, in the loop closing and after the loop opening.
Preferably, the analyzing the data of the process of ring opening includes:
calculating the sum of the first currents of the two loop closing lines before loop closing;
calculating the sum of the second currents of the two loop closing circuits after the loop is opened;
calculating the absolute value of the difference between the sum of the first currents and the sum of the second currents;
judging whether a current load is lost in the process of closing and opening the loop according to the relation between the absolute value of the difference value and a preset current limit value;
and if the absolute value of the difference is smaller than the preset current limit value, judging that no current load is lost in the ring closing and opening process.
Preferably, the recording data of the process of ring opening includes:
and recording a data verification result before loop closing, a loop closing and opening monitoring result and a current load loss result in the loop closing and opening process.
As a second aspect provided by the present invention, there is provided an analyzing and recording apparatus for a distribution line loop closing and opening process, wherein the analyzing and recording apparatus for a distribution line loop closing and opening process includes:
the loop closing operation switch acquisition module is used for acquiring a loop closing operation switch;
the building module is used for building a loop model according to the closed-loop operation switch;
the first checking module is used for checking the consistency of a main transformer wiring group in a loop model;
the second checking module is used for checking data before loop closing if the main transformer wiring sets on the two sides of the loop closing circuit are consistent;
the monitoring module is used for executing the monitoring of the ring closing and opening process if the data check before the ring closing passes;
and the analysis and recording module is used for analyzing and recording the data of the ring opening process.
According to the analysis and recording method for the loop closing and opening process of the distribution line, provided by the invention, through constructing a loop model, carrying out consistency check on a wiring group, carrying out check on data before loop closing and monitoring the loop closing and opening process, and analyzing and recording the data after loop opening, the electric quantity information required by the loop closing and opening operation can be quickly and effectively analyzed, safety check is carried out before the loop opening operation, data monitoring in the loop closing and opening process and historical records after the loop closing and opening are carried out, the operation of a dispatcher is reduced, an auxiliary decision is provided, and historical measured data support is provided for loop closing impact current calculation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of an analysis and recording method for a loop closing and opening process of a distribution line according to the present invention.
Fig. 2 is a flowchart of an embodiment of the analyzing and recording method for the loop closing and opening process of the distribution line according to the present invention.
Fig. 3 is a block diagram of an analysis and recording apparatus for a loop closing and opening process of a distribution line according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
As a first aspect of the present invention, there is provided an analyzing and recording method for a loop closing and opening process of a distribution line, wherein, as shown in fig. 1, the analyzing and recording method for the loop closing and opening process of the distribution line comprises:
s110, acquiring a loop closing operation switch;
s120, constructing a loop model according to the closed-loop operation switch;
s130, checking the consistency of the main transformer wiring group in the loop model;
s140, if the main transformer wiring groups on the two sides of the loop closing circuit are consistent, verifying data before loop closing;
s150, if the data check before the loop closing is passed, monitoring the loop closing and opening process;
and S160, analyzing and recording the data of the ring opening process.
According to the analysis and recording method for the loop closing and opening process of the distribution line, provided by the invention, through constructing a loop model, carrying out consistency check on a wiring group, carrying out check on data before loop closing and monitoring the loop closing and opening process, and analyzing and recording the data after loop opening, the electric quantity information required by the loop closing and opening operation can be quickly and effectively analyzed, safety check is carried out before the loop opening operation, data monitoring in the loop closing and opening process and historical records after the loop closing and opening are carried out, the operation of a dispatcher is reduced, an auxiliary decision is provided, and historical measured data support is provided for loop closing impact current calculation.
The following describes a specific embodiment of the analysis and recording method for the loop closing and opening process of the distribution line according to the present invention with reference to fig. 1 and 2.
Specifically, according to the analysis and recording method for the distribution line loop closing and opening process, a loop model (including a loop closing line and a bus main transformer in a corresponding station and a switch on the loop) is constructed according to a selected switch to be operated to close the loop, the consistency of a main transformer wiring group is checked before closing the loop and the bus voltage difference before closing the loop is checked, the out-of-limit prompt of the main transformer load difference is carried out, a user decides whether to terminate the loop closing and opening process according to the information, the position change of a loop closing path switch and the current power of the loop closing line and the like are monitored in the loop closing and opening process, and the current power of the loop closing line in three states before closing the loop, in the loop closing process and after opening the loop is recorded. And after the loop closing and opening process is finished, calculating whether the current check before and after the loop closing and opening loses the load or not and performing historical storage on the whole loop closing and opening process data and event records.
As a specific implementation of loop model building, the building of the loop model according to the closed-loop operation switch includes:
acquiring the state of a closed-loop operation switch in real time;
acquiring power supply points on two sides of a closed loop operation switch;
analyzing a substation outgoing line corresponding to power points on two sides of the closed-loop operation switch and a bus main transformer corresponding to the substation outgoing line;
and analyzing a switch set of the closed loop circuit according to the outgoing line of the transformer substation and the main transformer of the bus.
Further specifically, a loop model is constructed according to the selected switch to be closed in loop operation, wherein the loop model comprises a loop closing circuit, a bus main transformer in a corresponding station and switch equipment on a loop. According to the existing power distribution network CIM model standard, according to a loop closing switch selected by a user, according to the real-time state of a distribution automation acquisition switch, power points are traced from two sides of the loop closing switch, the outgoing lines of the transformer substations corresponding to the power points on two sides and the corresponding bus main transformers appear are analyzed, and the switch set on the loop is further analyzed.
As a specific embodiment of the connection group, the verifying the consistency of the main transformer connection group on both sides of the loop closing circuit includes:
acquiring a wiring group of a low-voltage side winding of the bus main transformer;
judging whether the wiring groups are consistent or not;
if the connection groups are consistent, a step of verifying the data before loop closing is executed;
and if the wiring group is not consistent, stopping analysis of the ring closing and opening process.
Further specifically, the main transformers on two sides of the closed loop are analyzed, a wiring group (star connection or angular connection) of a low-voltage side winding of each main transformer is read, if the wiring groups are the same, analysis in the loop closing and opening process is continued, and if not, analysis in the loop closing and opening process is stopped.
As a specific implementation of data verification, the verifying the data before loop closing includes:
acquiring main transformer low-voltage side current and bus voltage on two sides of a loop closing operation switch;
calculating the load difference of a main transformer and the voltage difference of a bus;
judging whether the main transformer load difference is greater than a first preset limit value or not and whether the bus voltage difference is greater than a second preset limit value or not;
if the load difference of the main transformer is not greater than a first preset limit value and the voltage difference of the bus is not greater than a second preset limit value, judging that the data check before the loop closing is passed;
otherwise, prompting whether to finish the analysis of the ring closing and opening process to the user.
More specifically, the main transformers and the buses on the two sides of the loop are analyzed, the currents (marked as Ia0 and Ia 1) on the low-voltage sides of the main transformers on the two sides and the voltages (marked as Uab0 and Uab 1) of the buses are read, the absolute value of the difference between main transformer load differences (Ia 0 and Ia1 and marked as dI) and the absolute value of the difference between bus voltage differences (Uab 0 and Uab1 and marked as dU) are calculated, and whether the main transformer load differences exceed the limit value and the dI is larger than the preset limit value or not is judged. And whether the bus load difference exceeds the limit or not and whether the dU/Uab 0 is larger than the preset limit or not. If the out-of-limit exists, the user analyzes whether the ring closing and opening process is finished.
Specifically, the performing loop closing and opening process monitoring includes:
and counting the current power of the loop closing circuit before loop closing, in the loop closing and after the loop opening.
Further specifically, the main transformer and the bus on the two sides of the closed loop and the closed loop path are analyzed, and at the moment, the system continuously monitors SCADA real-time data change, mainly monitors the electric quantity information of the closed loop circuit, the station and the like, and the switch position information on the closed loop path. And when the power current of the two closed loop lines is monitored to suddenly change, recording the electric quantity data before and after the change. Recording the current power of two loop closing circuits before loop closing, prompting the switch to shift to the closed position when software monitors that the loop closing switch is shifted to the closed position, prompting that the circuits are successfully closed, starting to wait for the loop opening operation, and recording the current power of the two loop closing circuits in the closed loop. When any switch on the closed loop path is monitored to be changed from the closed position to the open position, the switch is prompted to change positions and open positions, and the circuit is prompted to be successfully opened. And recording the current power of the two loop closing lines after loop closing in a delayed manner. And counting the current power of the loop closing circuit in three states before loop closing, in the loop closing and after loop opening.
Specifically, the analyzing the data of the process of ring opening includes:
calculating the sum of the first currents of the two loop closing lines before loop closing;
calculating the sum of the second currents of the two loop closing circuits after the loop is opened;
calculating the absolute value of the difference between the sum of the first currents and the sum of the second currents;
judging whether a current load is lost in the process of closing and opening the loop according to the relation between the absolute value of the difference value and a preset current limit value;
and if the absolute value of the difference is smaller than the preset current limit value, judging that no current load is lost in the ring closing and opening process.
More specifically, in the closed loop, the current power of the closed loop circuit in three states after the loop is released in the closed loop is counted on the basis of the above steps, the sum of the two circuit currents before the closed loop (denoted as I0) and the sum of the two circuit currents after the loop is released (denoted as I1) are calculated, and if the absolute value of the difference between I0 and I1 is smaller than a preset limit value, it indicates that the load is not lost in the process of closing and releasing the loop, otherwise, it is assumed that no load is lost.
Specifically, the recording data of the process of separating the ring includes:
and recording a data verification result before loop closing, a loop closing and opening monitoring result and a current load loss result in the loop closing and opening process.
Recording the information of the whole loop closing process in a business database according to the analysis result of the steps, wherein the information mainly comprises the following steps: loop model: the loop closing switch, the loop closing circuit and the corresponding plant station, the bus and the main transformer are connected; data section before ring closing: electrical quantities of loop closing lines and stations; and (3) data verification result before loop closing: main transformer load difference and bus voltage difference; before loop closing, in the loop closing process, the current power of the loop closing circuit in three states after the loop is released; a switch position change event and a current power sudden change event in a loop closing process; and judging results of load loss before and after ring closing and opening.
As a second aspect of the present invention, there is provided an analyzing and recording apparatus for a distribution line looping and looping process, wherein, as shown in fig. 3, the analyzing and recording apparatus 100 for a distribution line looping and looping process includes:
an acquiring module 110, wherein the acquiring module 110 is used for acquiring a closed-loop operation switch;
a building module 120, wherein the building module 120 is configured to build a loop model according to the closed-loop operation switch;
the first checking module 130, the first checking module 130 is configured to check consistency of a main transformer wiring group in a loop model;
the second checking module 140, where the second checking module 140 is configured to check data before loop closing if the main transformer connection sets on both sides of the loop closing circuit are identical;
a monitoring module 150, wherein the monitoring module 150 is configured to perform monitoring of a ring closing and opening process if data check before the ring closing passes;
an analysis and recording module 160, wherein the analysis and recording module 160 is configured to analyze and record data of the looping-off process.
According to the analysis and recording device for the loop closing and opening process of the distribution line, provided by the invention, through constructing a loop model, carrying out consistency check on a wiring group, carrying out check on data before loop closing and monitoring the loop closing and opening process, and analyzing and recording the data after loop opening, the electric quantity information required by the loop closing and opening operation can be quickly and effectively analyzed, safety check is carried out before the loop opening operation, data monitoring in the loop closing and opening process and historical records after the loop closing and opening are carried out, the operation of a dispatcher is reduced, an auxiliary decision is provided, and historical measured data support is provided for loop closing impact current calculation.
For the specific operation principle of the analysis and recording apparatus for the loop closing and opening process of the distribution line provided by the present invention, reference may be made to the foregoing description, and details are not described herein again.
It will be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, and the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (6)
1. The analysis and recording method for the loop closing and opening process of the distribution line is characterized by comprising the following steps of:
acquiring a loop closing operation switch;
constructing a loop model according to the loop closing operation switch;
checking the consistency of a main transformer wiring group in a loop model;
if the main transformer wiring groups on the two sides of the loop closing circuit are consistent, verifying data before loop closing;
if the data check before the loop closing is passed, monitoring the loop closing and opening process;
analyzing and recording data of the ring opening process;
the performing a loop closing and opening process monitoring comprises:
counting the current power of a loop closing circuit before loop closing, in loop closing and after loop opening;
the analyzing the data of the ring opening process comprises the following steps:
calculating the sum of the first currents of the two loop closing lines before loop closing;
calculating the sum of the second currents of the two loop closing circuits after the loop is opened;
calculating the absolute value of the difference between the sum of the first currents and the sum of the second currents;
judging whether a current load is lost in the process of closing and opening the loop according to the relation between the absolute value of the difference value and a preset current limit value;
and if the absolute value of the difference is smaller than the preset current limit value, judging that no current load is lost in the ring closing and opening process.
2. The method of claim 1, wherein the constructing the loop model according to the closed-loop operation switch comprises:
acquiring the state of a closed-loop operation switch in real time;
acquiring power supply points on two sides of a closed loop operation switch;
analyzing a substation outgoing line corresponding to power points on two sides of the closed-loop operation switch and a bus main transformer corresponding to the substation outgoing line;
and analyzing a switch set of the closed loop circuit according to the outgoing line of the transformer substation and the main transformer of the bus.
3. The method according to claim 2, wherein the checking the consistency of the main transformation group on both sides of the closed loop circuit comprises:
acquiring a wiring group of a low-voltage side winding of the bus main transformer;
judging whether the wiring groups are consistent or not;
if the connection groups are consistent, a step of verifying the data before loop closing is executed;
and if the wiring group is not consistent, stopping analysis of the ring closing and opening process.
4. The method as claimed in claim 2, wherein the verifying the pre-loop closing data comprises:
acquiring main transformer low-voltage side current and bus voltage on two sides of a loop closing operation switch;
calculating the load difference of a main transformer and the voltage difference of a bus;
judging whether the main transformer load difference is greater than a first preset limit value or not and whether the bus voltage difference is greater than a second preset limit value or not;
if the load difference of the main transformer is not greater than a first preset limit value and the voltage difference of the bus is not greater than a second preset limit value, judging that the data check before the loop closing is passed;
otherwise, prompting whether to finish the analysis of the ring closing and opening process to the user.
5. The method of claim 1, wherein recording data of a decollation process comprises:
and recording a data verification result before loop closing, a loop closing and opening monitoring result and a current load loss result in the loop closing and opening process.
6. An analyzing and recording device for a distribution line loop closing and opening process, which is used for realizing the analyzing and recording method for the distribution line loop closing and opening process of any one of claims 1 to 5, wherein the analyzing and recording device for the distribution line loop closing and opening process comprises:
the acquisition module is used for acquiring the closed-loop operation switch;
the building module is used for building a loop model according to the closed-loop operation switch;
the first checking module is used for checking the consistency of a main transformer wiring group in a loop model;
the second checking module is used for checking data before loop closing if the main transformer wiring sets on the two sides of the loop closing circuit are consistent;
the monitoring module is used for executing the monitoring of the ring closing and opening process if the data check before the ring closing passes;
and the analysis and recording module is used for analyzing and recording the data of the ring opening process.
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| CN103219727A (en) * | 2013-04-01 | 2013-07-24 | 上海交通大学 | Divisional power grid structure dynamic adjustment method based on actual measurement of power management unit (PMU) |
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