CN111682534A - Method for analyzing batch transfer scheme of feeder lines of power distribution network - Google Patents
Method for analyzing batch transfer scheme of feeder lines of power distribution network Download PDFInfo
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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
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0075—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source according to economic or energy efficiency considerations, e.g. economic dispatch
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- H—ELECTRICITY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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Abstract
The invention provides a method for analyzing a batch transfer scheme of feeder lines of a power distribution network, which is based on analysis of real-time power grid models, operation data and parameter information of a main station system and an automatic main station system for dispatching of a main distribution network, and ensures the real-time analysis of the feeder lines of the power distribution network related to buses of various transfer-out devices; the data information required by intelligent analysis of the real-time synchronous feeder line batch transfer scheme can ensure the accuracy of the intelligent analysis scheme when an abnormal defect occurs in a dispatching system and an accident event needs emergency analysis and processing; the method can not only set the roll-out equipment, but also receive the roll-out equipment provided by the source end system function by providing a control service mode, thereby ensuring the rapidity of the integration through application of the system; various data are acquired from the source end of the main distribution network scheduling system to carry out the intelligent analysis of the whole process of the feeder batch transfer scheme, and the reliability of the analysis scheme is ensured.
Description
Technical Field
The invention relates to the field of main and distribution network management algorithms, in particular to a method for analyzing a batch transfer scheme of a distribution network feeder.
Background
With the large scale of the equipment governed by the regional power grid, the number of substations and power supply lines under all levels of voltage increase, and the real-time control system of the power grid becomes more and more complex. And the more the number of the regional transformer substations is, the more distribution network lines are used for supplying power to customers.
In the construction of a daily power grid, a main network operation line and equipment need to be powered off, and a transformer substation and a line are continuously added while economic development is achieved, so that more loads are connected; and a large amount of power grid operation equipment still need regularly carry out the maintenance work that has a power failure, just can guarantee the reliable power supply to the customer. The maintenance work of the main network lines can partially cause power failure to the transformer substation or the bus with a weak power grid operation mode, and the n-1 accident power failure risk can occur even if power failure is not needed.
When the power grid line equipment is suddenly damaged due to a fault, or severe weather such as typhoon and strong thunderstorm occurs in an area, the main network operation line or the equipment can be failed and power failure can be caused, and one to a plurality of transformer substations and bus accident power failure events can also be caused. Generally, tens of power distribution network feeders of a transformer substation in normal operation of a power grid supply power to customers, and if a large-range power failure accident occurs in a region, hundreds of power distribution network feeders can be powered off at the same time.
Under the conditions, some distribution network lines supplied with power by the power-off substations and buses can be analyzed in a planned way to be converted into a power supply scheme, and when an accident happens, a value dispatcher needs to quickly, timely and accurately analyze the power supply conversion scheme of the batch feeder lines supplied with power by the power-off buses of one or a plurality of substations. In the conventional analysis of the distribution network feeder batch transfer scheme, a connection and contact relation is analyzed by a dispatcher according to a power grid tidal current diagram, a transformer substation wiring diagram and a feeder line single line diagram of a main network dispatching system and a distribution network dispatching system, and then the residual loadable capacity of the technology is analyzed according to the running load condition of each device of a power grid and the current-carrying capacity condition of the device. When dealing with the above analysis task of a batch feeder, the amount of calculation required is very large and complex.
Massive data and information are continuously analyzed on a batch feeder line by manpower, and even if the massive data and the information are analyzed by a plurality of dispatchers at the same time, the massive data and the information are very hard to analyze. Particularly, when a large number of distribution network feeder lines are subjected to power failure caused by accident power failure, the quick power restoration of a power supply client of a power grid is more difficult to guarantee. The manual analysis factors are difficult to meet the management and control requirements of the modern smart power grid, so the intelligent analysis method and system for the batch transfer scheme of the feeder line of the power distribution network effectively solve the problems.
Although some areas have similar analysis methods, the method lacks a master station real-time model and operation data support and the optimal characteristics of an intelligent analysis transfer scheme, the method simulates the manual analysis process and requirements of scheduling operators in the whole process, and the similar data provided by the system solves all data analysis and statistics requirements of the power distribution network feeder batch transfer scheme analysis faced by operation mode personnel and scheduling operators, thereby realizing the analysis of the feeder batch transfer scheme in real time, quickly, concisely, accurately and reliably.
The application number 201910008649.0 discloses a power distribution network load transfer auxiliary decision analysis method, which overcomes the defects of long load transfer time, low efficiency and poor reliability caused by the fact that the traditional power distribution network load transfer mainly depends on manual rough calculation of regulating and controlling personnel, ensures the safety, reliability and high efficiency of the power distribution network load transfer, and improves the safety production and high-quality service level of the power distribution network. However, the patent cannot realize the data information required by the intelligent analysis of the real-time synchronous feeder line batch transfer scheme, and can ensure the accuracy of the intelligent analysis scheme when the scheduling system has abnormal defects and the accident event needs to be analyzed and processed emergently.
Disclosure of Invention
The invention provides a method for analyzing a batch transfer scheme of feeder lines of a power distribution network, which ensures the real-time analysis of the feeder lines of the power distribution network related to all transfer-out equipment buses.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a method for analyzing a batch transfer scheme of a feeder line of a power distribution network comprises the following steps:
s1: collecting data information from a scheduling master station system: acquiring power grid CIM model data of a main network dispatching automation system and power grid CIM model data of a distribution network dispatching automation system by using a data transmission channel, and splicing the power grid model data of the main network and the distribution network; total model CIM for realizing integrated through of main distribution modelGeneral assembly；
S2: receiving power grid operation data of a main network dispatching automation system and power grid operation data of a distribution network dispatching automation system, and storing the maximum current I of batch transfer supply equipment and feedersmaxAnalyzing the bearing capacity of the batch transfer scheme for contacting the opposite side equipment;
s3: receiving power grid CIM model data of a distribution network dispatching automation system, and analyzing contact relation information of distribution network feeders;
s4: setting a distribution network bus for analyzing the transfer-out equipment, selecting or controlling transformer substation or bus transfer-out equipment provided by the input or control through a model relation established by splicing the power grid model data of the main distribution network in the step S1, and analyzing the batch transfer-out power supply feeder data of the distribution networks belonging to the subordinate transfer-out equipment;
s5: determining a transfer feeder line by using the transfer power supply feeder line data obtained in the step S4, retrieving a corresponding tie switch and a corresponding opposite side feeder line according to the model connection relation obtained in the step S3, and obtaining transfer feeder line data of a tie opposite side of each transfer feeder line;
s6: determining the superior distribution network bus and power supply main transformer data of each transfer feeder according to the model connection relation obtained in the step S3 by using the transfer feeder data obtained in the step S5;
s7: and (4) comparing and analyzing the optimal transshipment scheme of the transshipment feeder line by using the data comprehensive feeder line contact relation and the parameter data obtained in the steps S2, S3, S5 and S6.
Further, in step S1, the process of splicing the grid model data of the main distribution network is as follows: model splicing is carried out on the feeder data of the distribution network system head end by the distribution network feeder at the tail end of the main network system, and the identification rule of the main distribution network feeder is as follows: substation name + interval number.
Further, in step S2, the feeder line switching time is used to collect the maximum load current I of the device according to the scheduled switching timemaxThe total current of the feeder current added and converted into the opposite feeder current does not exceed the current-carrying capacity value I of the opposite feederCarrier (turning)>IIs turned intoIIs rolled out(ii) a When n feeders of the feeders for transferring power in batches simultaneously transfer power to the same main transformer of n lines on the opposite side, the load current transferred to the main transformer is the sum of the load of the feeders and the load of the transferred feeders: i isTotal load＝IMain transformer max+IGo to 1max+IGo to 1max+IGo to 2max+IGo to 3max+ … …; the total current of the main transformer on the feeder side, which is added with the load current transferred in batches, does not exceed the quota load flow value of the main transformer: i isMain transformer-carrier>ITotal load。
Further, in step S3, the contact relationship of the distribution network feeders is core data of batch analysis of the distribution network feeders, and considering that the distribution network dispatching automation system is constantly updating the distribution network line model, the contact relationship between the distribution network feeders is updated, and the update frequency is set to be once in 1 hour; the interconnection switch of each distribution network feeder line has various conditions, some interconnection switches do not have the power transfer capability, some interconnection switches have only 1 interconnection point, some interconnection switches have n interconnection points, and some interconnection switches are in line internal interconnection or in simultaneous interconnection with a plurality of interconnection points of a certain line, so that various conditions need to be analyzed and identified; storing the contact data of the distribution network feeder line with the contact switch: opposite side connecting lines and connecting points.
Further, in step S4, the process of analyzing the batch data of the power supply feeder transferred from the subordinate transfer device belonging to the distribution network is as follows:
1) the transfer-out device is set as follows: the bus is the superior power supply equipment of a power supply feeder line, so the needed transfer-out equipment must comprise a distribution network bus;
2) and through the topological connection relation, performing correlation analysis on the selected distribution network bus to obtain a distribution network feeder list belonging to the jurisdiction of the transferred equipment.
Further, the specific process of step S7 is:
1) screening the transfer-out feeder lines without contact relation in batch transfer without carrying out transfer scheme analysis;
2) and the batch transferring-out line with the connection relation analyzes the opposite sides of all the connection switches to be transferred into the feeder line:
A) if the first record of the opposite side line is one of the batch transfer feeder lines is not analyzed;
B) determining that the opposite side line is not one of batch transfer-out feeders as a transfer-in feeder, and determining that 1 transfer-out scheme exists if only 1 line exists;
C) if one transfer-out feeder line has a plurality of interconnection switches and the opposite side meets the condition B, determining that a plurality of transfer-out schemes exist;
3) for the outgoing feeder line with the contact relation in the step 2), although belonging to the condition of the point A in the step 2), the incoming feeder line at the opposite side meets the condition of the step 2) in other feeder line analysis in the batch outgoing feeder line, and the incoming feeder line at the opposite side of the contact line is considered as the incoming feeder line of the line, wherein the outgoing feeder line can indirectly have outgoing power supply capacity;
4) for the situation of step C of step 2) in the above 2) with contact relation, in the intelligent analysis method, priority ordering needs to be carried out on a plurality of contralateral transfer feeder lines capable of carrying out contact transfer power supply;
5) for the interconnection contralateral transfer feeder and the main transformer of the transfer-out feeder, after the transfer-in feeder is selected by considering the determined highest priority, the interconnection contralateral transfer feeders of a plurality of transfer-out feeders are the same line, and when the total transfer-in load current margin of the transfer-out feeders is analyzed and calculated, a plurality of transfer-in objects, namely I need to be simultaneously considered in a combined mannerIs turned into＝ITurned out to 1+IRoll-out 2+ … …；
6) And for the intelligent analysis output of the system feeder batch transfer scheme, m transfer-out and n transfer-out final results are given according to the synchronous analysis results 1) to 5), wherein m represents that a plurality of interconnection switches can be transferred, and n represents that only a plurality of interconnection transfer conditions can be transferred.
Further, the roll-out situation is as follows:
1) and can be directly rotated: the feeder line can be directly transferred to the opposite side feeder line of the transfer feeder line under the non-transfer equipment through the interconnection switch, namely the feeder line cannot be directly transferred to the local side feeder line to be transferred to supply power in batches;
2) and can be linked to rotate: although the feeder line can not be directly transferred to the opposite side feeder line of the non-transfer feeder line, the feeder line is connected with the batch transfer feeder line which can be directly transferred, and the indirect transfer power supply, commonly called as 'secondary connection', can be realized by firstly transferring the contact power to the batch transfer feeder line which can be directly transferred;
3) and can not be rotated: although the interconnection switch can be connected, the interconnection relation is that the feeder line on the opposite side is a transfer-out feeder line to be transferred to supply power in batches, so the transfer-supply scheme belongs to the condition of non-transferable power supply;
4) and no communication: the transfer feeder line to be transferred to the power supply in batches has no interconnection switch, and the transfer power supply cannot be implemented.
Further, in step S7, the optimal transfer scheme ranking is obtained in step 4), and the specific method is as follows:
①, current carrying capacity I respectively transferred from and to the feeder lineLoad inMaximum load current IOut max、IGo to maxWhether the interconnection switch has data such as remote control function;
② calculating the current carrying capacity I of the incoming feeder line on multiple contact opposite sides of the outgoing feeder lineCarrierMinus its maximum load current IInto maxThe remaining load current margin IYu＝ICarrier-IGo to maxObtaining the transferable current margin, and subtracting the load current I of each transfer feedermaxObtaining the total load margin I of the switching feeder line from the contact opposite sideGeneral Yu＝IYu-IRotate out 1max-IRotate out 1max(ii) a Each total transfer margin may be positive or negative, i.e. an overload number;
③, sorting the total load current margin of the incoming feeder line according to positive and negative dimensions, using the positive value as the preferential incoming feeder line, and remotely controlling the incoming feeder line according to the interconnection switch and obtaining the total margin condition value IGeneral YuMaximum, as the highest priority and so on; if the number is negative, the overload of the switching-in feeder on the opposite contact side can be caused after switching-in, the switching-in feeder is arranged behind, the switching-in feeder is remotely controlled according to the contact switch, the minimum value of the total margin condition is used as the highest priority, and the like.
Furthermore, the method also analyzes the relevant dimension data of the feeder batch transfer scheme, including the number and batch transfer condition of the transfer-out equipment and the transfer-out feeder, the related load and user statistical information, and the transfer-in number and load condition of the transfer-in equipment and the feeder on the opposite side of each feeder contact, and the related load and user statistical information.
Further, the secondary connection needs to consider that the opposite-side switching feeder needs to bear the total load of three feeders, namely IGeneral assembly＝ITurned out to 1+IRoll-out 2。
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the method ensures the real-time analysis of the feeder line of the power distribution network related to each transfer-out equipment bus based on the analysis of the real-time power grid model, the operation data and the parameter information of the main and distribution network dispatching automation main station systems; the data information required by intelligent analysis of the real-time synchronous feeder line batch transfer scheme can ensure the accuracy of the intelligent analysis scheme when an abnormal defect occurs in a dispatching system and an accident event needs emergency analysis and processing; the method can not only set the roll-out equipment, but also receive the roll-out equipment provided by the source end system function by providing a control service mode, thereby ensuring the rapidity of the integration through application of the system; various data are acquired from the source end of the main distribution network scheduling system to carry out the intelligent analysis of the whole process of the feeder batch transfer scheme, so that the reliability of the analysis scheme is ensured; various data are collected by applying a classified collection method, and a complex analysis process is processed in the background, so that a comprehensive display scheme provided for system users is concise; the intelligent analysis of the batch transfer of the feeder lines of the power distribution network in the whole process is realized, and the operation management level of the intelligent power grid system in the region is effectively improved by applying an innovative technology.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, a method for analyzing a batch transfer scheme of a feeder line of a distribution network includes the following steps:
s1: collecting data information from a scheduling master station system: acquiring power grid CIM model data of a main network dispatching automation system and power grid CIM model data of a distribution network dispatching automation system by using a data transmission channel, and splicing the power grid model data of the main network and the distribution network; total model CIM for realizing integrated through of main distribution modelGeneral assembly；
S2: receiving power grid operation data of a main network dispatching automation system and power grid operation data of a distribution network dispatching automation system, and storing the maximum current I of batch transfer supply equipment and feedersmaxAnalyzing the bearing capacity of the batch transfer scheme for contacting the opposite side equipment;
s3: receiving power grid CIM model data of a distribution network dispatching automation system, and analyzing contact relation information of distribution network feeders;
s4: setting a distribution network bus for analyzing the transfer-out equipment, selecting or controlling transformer substation or bus transfer-out equipment provided by the input or control through a model relation established by splicing the power grid model data of the main distribution network in the step S1, and analyzing the batch transfer-out power supply feeder data of the distribution networks belonging to the subordinate transfer-out equipment;
s5: determining a transfer feeder line by using the transfer power supply feeder line data obtained in the step S4, retrieving a corresponding tie switch and a corresponding opposite side feeder line according to the model connection relation obtained in the step S3, and obtaining transfer feeder line data of a tie opposite side of each transfer feeder line;
s6: determining the superior distribution network bus and power supply main transformer data of each transfer feeder according to the model connection relation obtained in the step S3 by using the transfer feeder data obtained in the step S5;
s7: and (4) comparing and analyzing the optimal transshipment scheme of the transshipment feeder line by using the data comprehensive feeder line contact relation and the parameter data obtained in the steps S2, S3, S5 and S6.
In step S1, the process of splicing the grid model data of the main and distribution networks is as follows: model splicing is carried out on the feeder data of the distribution network system head end by the distribution network feeder at the tail end of the main network system, and the identification rule of the main distribution network feeder is as follows: substation name + interval number.
In step S2, the maximum load current I of the device is collected according to the planned switching time of the feeder switching power supplymaxThe total current of the feeder current added and converted into the opposite feeder current does not exceed the current-carrying capacity value I of the opposite feederCarrier (turning)>IIs turned intoIIs rolled out(ii) a When n feeders of the feeders for transferring power in batches simultaneously transfer power to the same main transformer of n lines on the opposite side, the load current transferred to the main transformer is the sum of the load of the feeders and the load of the transferred feeders: i isTotal load＝IMain transformer max+IGo to 1max+IGo to 1max+IGo to 2max+IGo to 3max+ … …; the total current of the main transformer on the feeder side, which is added with the load current transferred in batches, does not exceed the quota load flow value of the main transformer: i isMain transformer-carrier>ITotal load。
In step S3, the contact relationship of the distribution network feeders is core data of batch analysis of the distribution network feeders, and considering that the distribution network dispatching automation system is continuously updating the distribution network line model, the contact relationship between the distribution network feeders is updated, and the update frequency is set once in 1 hour; the interconnection switch of each distribution network feeder line has various conditions, some interconnection switches do not have the power transfer capability, some interconnection switches have only 1 interconnection point, some interconnection switches have n interconnection points, and some interconnection switches are in line internal interconnection or in simultaneous interconnection with a plurality of interconnection points of a certain line, so that various conditions need to be analyzed and identified; storing the contact data of the distribution network feeder line with the contact switch: opposite side connecting lines and connecting points.
In step S4, the process of analyzing the batch data of the power supply feeder transferred from the subordinate transfer device belonging to the distribution network includes:
1) the transfer-out device is set as follows: the bus is the superior power supply equipment of a power supply feeder line, so the needed transfer-out equipment must comprise a distribution network bus;
2) and through the topological connection relation, performing correlation analysis on the selected distribution network bus to obtain a distribution network feeder list belonging to the jurisdiction of the transferred equipment.
The specific process of step S7 is:
1) screening the transfer-out feeder lines without contact relation in batch transfer without carrying out transfer scheme analysis;
2) and the batch transferring-out line with the connection relation analyzes the opposite sides of all the connection switches to be transferred into the feeder line:
A) if the first record of the opposite side line is one of the batch transfer feeder lines is not analyzed;
B) determining that the opposite side line is not one of batch transfer-out feeders as a transfer-in feeder, and determining that 1 transfer-out scheme exists if only 1 line exists;
C) if one transfer-out feeder line has a plurality of interconnection switches and the opposite side meets the condition B, determining that a plurality of transfer-out schemes exist;
3) for the outgoing feeder line with the contact relation in the step 2), although belonging to the condition of the point A in the step 2), the incoming feeder line at the opposite side meets the condition of the step 2) in other feeder line analysis in the batch outgoing feeder line, and the incoming feeder line at the opposite side of the contact line is considered as the incoming feeder line of the line, wherein the outgoing feeder line can indirectly have outgoing power supply capacity;
4) for the situation of step C of step 2) in the above 2) with contact relation, in the intelligent analysis method, priority ordering needs to be carried out on a plurality of contralateral transfer feeder lines capable of carrying out contact transfer power supply;
5) for the interconnection contralateral transfer feeder and the main transformer of the transfer-out feeder, after the transfer-in feeder is selected by considering the determined highest priority, the interconnection contralateral transfer feeders of a plurality of transfer-out feeders are the same line, and when the total transfer-in load current margin of the transfer-out feeders is analyzed and calculated, a plurality of transfer-in objects, namely I need to be simultaneously considered in a combined mannerIs turned into＝ITurned out to 1+IRoll-out 2+ … …；
6) And for the intelligent analysis output of the system feeder batch transfer scheme, m transfer-out and n transfer-out final results are given according to the synchronous analysis results 1) to 5), wherein m represents that a plurality of interconnection switches can be transferred, and n represents that only a plurality of interconnection transfer conditions can be transferred.
The roll-out conditions are as follows:
1) and can be directly rotated: the feeder line can be directly transferred to the opposite side feeder line of the transfer feeder line under the non-transfer equipment through the interconnection switch, namely the feeder line cannot be directly transferred to the local side feeder line to be transferred to supply power in batches;
2) and can be linked to rotate: although the feeder line can not be directly transferred to the opposite side feeder line of the non-transfer feeder line, the feeder line is in contact with the batch transfer feeder line which can be directly transferred, the power can be transferred to the batch transfer feeder line which can be directly transferred through contact first, indirect transfer power supply is realized, commonly called as 'secondary contact', and the secondary contact needs to consider that the opposite side transfer feeder line needs to bear all loads of three feeder lines, namely IGeneral assembly＝ITurned out to 1+IRoll-out 2；
3) And can not be rotated: although the interconnection switch can be connected, the interconnection relation is that the feeder line on the opposite side is a transfer-out feeder line to be transferred to supply power in batches, so the transfer-supply scheme belongs to the condition of non-transferable power supply;
4) and no communication: the transfer feeder line to be transferred to the power supply in batches has no interconnection switch, and the transfer power supply cannot be implemented.
In step S7, the optimal transfer scheme ranking is obtained in step 4), and the specific method is as follows:
①, current carrying capacity I respectively transferred from and to the feeder lineLoad inMaximum load current IOut max、IGo to maxWhether the interconnection switch has data such as remote control function;
② calculating the current carrying capacity I of the incoming feeder line on multiple contact opposite sides of the outgoing feeder lineCarrierMinus its maximum load current IInto maxThe remaining load current margin IYu＝ICarrier-IGo to maxObtaining the transferable current margin, and subtracting the load current I of each transfer feedermaxObtaining the total load margin I of the switching feeder line from the contact opposite sideGeneral Yu＝IYu-IRotate out 1max-IRotate out 1max(ii) a Each total transfer margin may be positive or negative, i.e. an overload number;
③, sorting the total load current margin of the incoming feeder line according to positive and negative dimensions, using the positive value as the preferential incoming feeder line, and remotely controlling the incoming feeder line according to the interconnection switch and obtaining the total margin condition value IGeneral YuMaximum, as the highest priority and so on; if the number is negative, the overload of the switching-in feeder on the opposite contact side can be caused after switching-in, the switching-in feeder is arranged behind, the switching-in feeder is remotely controlled according to the contact switch, the minimum value of the total margin condition is used as the highest priority, and the like.
The method also analyzes the relevant dimension data of the batch feeder transferring scheme, including the transferring-out equipment, the number and batch transferring condition of the transferring-out feeder lines, the related load and user statistical information, and the transferring-in number and load condition of the transferring-in equipment and feeder lines on the opposite side of each feeder line contact, the related load and user statistical information.
Example 2
A method for analyzing a scheme for transferring a distribution network feeder line to a power supply in batches comprises the following steps:
s1, the process of collecting data information from the scheduling master station system is as follows: respectively splicing the power grid CIM model data of the main network dispatching automation system (1) and the power grid CIM model data of the distribution network dispatching automation system (2) by using a data transmission channel (3); total model CIM for realizing integrated through of main distribution modelGeneral assemblyThe system is provided with electricityNet full model data;
1) the method for splicing the main network model and the distribution network model (3) comprises the following steps: model splicing is carried out on the feeder data of the distribution network system head end by the distribution network feeder at the tail end of the main network system, and the identification rule of the main distribution network feeder is as follows: substation name + interval number;
2) the integration of the main and distribution network models can provide a connection relation for analyzing the superior buses and the transformer substations of the transfer line on two sides, and the analysis capability and efficiency of the batch transfer scheme of the feeder line are improved;
s2, receiving power grid operation data of the main network dispatching automation system (1) and power grid operation data of the distribution network dispatching automation system (2), wherein the power grid operation data comprise currents I of a main transformer and a feeder line, and storing the maximum currents I of batch transfer equipment and the feeder line in the systemmax(4) The bearing capacity of the opposite side equipment is contacted with a subsequent analysis batch transfer scheme;
1) maximum load current I of feeder line power supply time acquisition equipment according to planmaxThe total current of the feeder current added and converted into the opposite feeder current does not exceed the current-carrying capacity value I of the opposite feederCarrier (turning)>IIs turned intoIIs rolled out；
2) When n feeders of the feeders for transferring power in batches simultaneously transfer power to the same main transformer of n lines on the opposite side, the load current transferred to the main transformer is the sum of the load of the feeders and the load of the transferred feeders: i isTotal load＝IMain transformer max+IGo to 1max+IGo to 1max+IGo to 2max+IGo to 3max+ … …; the total current of the main transformer on the feeder side, which is added with the load current transferred in batches, does not exceed the quota load flow value of the main transformer: i isMain transformer-carrier>ITotal load
S3, receiving power grid CIM model data of the distribution network dispatching automation system (2), and analyzing contact relation information (5) of distribution network feeders in the system;
1) the contact relation data (5) of the distribution network feeders are core data of batch transfer analysis of the distribution network feeders, and considering that a distribution network dispatching automation system is continuously updating a distribution network line (GIS providing) model, the contact relation between the distribution network feeders of the system is updated, and the updating frequency is set to be once in 1 hour;
2) the interconnection switch of each distribution network feeder line has various conditions, some interconnection switches do not have the power transfer capability, some interconnection switches have only 1 interconnection point, some interconnection switches have n interconnection points, and some interconnection switches are in line internal interconnection or in simultaneous interconnection with a plurality of interconnection points of a certain line, so that various conditions need to be analyzed and identified;
3) storing the contact data of the distribution network feeder line with the contact switch: opposite side connecting lines and connecting points;
s4, setting a transfer-out device to analyze a distribution network bus (6), and rapidly analyzing the batch transfer-out power supply feeder data (7) of a distribution network belonging to the transfer-out device at the lower level through the model relation of (3) and the transfer-out devices such as a transformer substation or a bus provided by selecting or controlling the transfer-out device, wherein the method comprises the following steps;
1) the roll-out apparatus is set to: the bus is the superior power supply equipment of a power supply feeder line, so the needed transfer-out equipment must comprise a distribution network bus;
2) through the topological connection relation, a distribution network feeder list belonging to the jurisdiction of the equipment to be transferred is obtained through correlation analysis from the selected distribution network bus;
s5, searching corresponding tie switches and opposite side feeders according to the method of (5) through the determined outgoing feeders one by one (7), and obtaining the data (8) of the incoming feeders on the tie opposite sides of the outgoing feeders;
s6, determining (8) the upper-level distribution network bus and the power supply main transformer data (9) of each transfer feeder according to the model connection relation of (3) for the transfer feeder data of (8);
s7, synthesizing the data of (3), (4), (8) and (9), synthesizing the contact relation and parameter data of the feeder line, comparing, analyzing and transferring the optimal transferring scheme (10) of the feeder line, wherein the analyzing method is the most core technical link of the system, and mainly relates to the following contents:
1) screening the transfer-out feeder lines without contact relation in batch transfer without carrying out transfer scheme analysis;
2) the batch transferring-out line with the connection relation analyzes the opposite sides of all the connection switches of the batch transferring-out line to be transferred into the feeder line, and the method comprises the following steps:
A) if the prior record where the contralateral line is one of the batch drop feeders is not analyzed,
B) the determination that the opposite side line is not one of the bulk drop feeders is a drop feeder, and if there are only 1, it is determined that there are 1 drop scenarios,
C) if one transfer feeder has a plurality of interconnection switches and the opposite side meets the condition B, the transfer feeder is regarded as having a plurality of transfers
Outputting a scheme;
3) for the outgoing feeder line with the contact relation in the step 2), although the outgoing feeder line belongs to the condition of the point A in the step 2), the incoming feeder line on the opposite side meets the condition of the point B in the step 2) in other feeder line analysis in the batch outgoing feeder line, the outgoing feeder line can be considered to have the outgoing power supply capacity indirectly, and the incoming line on the opposite side of the contact line can also be considered as the incoming feeder line of the line;
4) for the situation of the 2) th point C having the contact relationship in the above 2), in the intelligent analysis method, priority ordering needs to be performed on a plurality of contralateral transfer feeders capable of contacting with the transfer power supply to obtain an optimal transfer power supply scheme ordering, and the specific method is as follows:
① respectively obtaining the current-carrying capacity I of each transfer-out and transfer-in feeder from (3) and (4)Load inMaximum load current IOut max、IGo to maxWhether the interconnection switch has data such as remote control function;
② calculating the current carrying capacity I of the incoming feeder line on multiple contact opposite sides of the outgoing feeder lineCarrierMinus its maximum load current IInto maxThe remaining load current margin IYu＝ICarrier-IGo to maxObtaining the transferable current margin, and subtracting the load current I of each transfer feedermaxObtaining the total load margin I of the switching feeder line from the contact opposite sideGeneral Yu＝IYu-IRotate out 1max-IRotate out 1max(ii) a Each total transfer margin may be positive or a negative (i.e., overload) number may occur;
③ sorting the total load current margin of the incoming feeder line according to positive and negative dimensions, using the positive value as the preferential incoming feeder line, and remotely controlling the incoming feeder line according to the interconnection switch and obtaining the total margin condition value IGeneral YuMaximum, as the highest priority and so on; if the number is negative, the overload of the switching-in feeder at the opposite side of the contact is caused after switching-in, the switching-in feeder is arranged at the back, the switching-in feeder is remotely controlled according to the contact switch, and the minimum value of the total margin condition is taken as the highest priority and so on;
5) for the connection opposite side transfer feeder and the main transformer of the transfer-out feeder, after the transfer-in feeder is selected by considering the determined highest priority, the connection opposite side transfer feeders of a plurality of transfer-out feeders may be the same line, and when the total transfer-in load current margin of the transfer-out feeders is analyzed and calculated, a plurality of transfer-in objects, namely I need to be simultaneously considered in a combined mannerIs turned into＝ITurned out to 1+IRoll-out 2+ … …；
6) For the intelligent analysis output of the feeder batch switching scheme of the system, m and n final results which can be switched out are given on an interface according to the synchronous analysis results of the 1) to 5), wherein m represents that a plurality of interconnection switches can be switched out, and n represents that only a plurality of interconnection switches can be switched out in a plurality of interconnection switching situations;
s8, considering that data to be displayed on the system interface is very large, hiding and not displaying (11) the non-critical content on the interface by default so as to improve the tidiness and the definition of the interface;
s9, after the determined optimal transfer scheme is determined in the step (10), determining a transfer-out condition (12) on an interface aiming at each transfer-out feeder line under the transfer-out equipment, wherein the transfer-out conditions mainly comprise the following conditions:
1) can be rotated directly: the feeder line can be directly transferred to the opposite side feeder line of the transfer feeder line under the non-transfer equipment through the interconnection switch, namely the feeder line cannot be directly transferred to the local side feeder line to be transferred to supply power in batches;
2) can be rotated in a combined way: although the feeder line can not be directly transferred to the opposite side feeder line of the non-transfer feeder line, the feeder line is connected with the batch transfer feeder line which can be directly transferred, and the indirect transfer power supply, commonly called as 'secondary connection', can be realized by firstly transferring the contact power to the batch transfer feeder line which can be directly transferred; however, it is necessary to note that the second-level connection needs to consider that the load of all three feeders needs to be borne when the opposite-side switching feeder is switched into the feeder, i.e. IGeneral assembly＝ITurned out to 1+IRoll-out 2；
3) Can not be rotated: although the interconnection switch can be connected, the interconnection relation is that the feeder line on the opposite side is a transfer-out feeder line to be transferred to supply power in batches, so the transfer-supply scheme belongs to the condition of non-transferable power supply;
4) no communication: the transfer feeder line to be transferred to the power supply in batches has no interconnection switch, and the transfer power supply cannot be implemented;
s10, the system interface statistically analyzes each relevant dimension data (13) of the feeder batch transfer scheme, including the number of the transfer-out devices, the number of the transfer-out feeders, the batch transfer condition, the statistical information related to loads, users and the like, and also including the statistical information related to loads, users and the like, of the transfer-in devices and feeders on the opposite side of each feeder contact;
s11, comprehensively displaying various key information (14) of the feeder batch transfer scheme on the system interface, and providing a comprehensive, comprehensive and detailed intelligent analysis scheme for the feeder batch transfer scheme of the power distribution network for operation analysts and on-duty dispatchers. The display information mainly comprises the following aspects:
1) transferring out the total number of the equipment, the switching state, the load current and statistical information;
total load of roll-out equipment ∑ IIs rolled out＝ITurned out to 1+ITurned out to be 2+ … … +IRotate out n；
∑ line for total power supply user of roll-out equipmentNumber of usersLine (I)1 user number +LineNumber of 2 users + … …Line nNumber of users；
2) A transferring-out feeder line list and related transferring-in scheme information of the transferring-in feeder line;
transferable feeder load, user statistics: only counting the transferable feeder lines according to the method 1);
the load of the feeder line can not be changed, and the user statistics is as follows: only non-transformable feeders are counted according to the method 1);
load of non-contact feeder line and user statistics: only counting feed lines without contact according to the method 1);
3) the load rate and heavy overload condition of the transferred feeder line and the main transformer thereof, the batch transferred current, the number of the feeders and the like;
and (3) switching to main transformer heavy overload: main transformerRate of load＝IMain transformer-main/IMain transformer-carrierIf: 1 is not less than main transformerRate of load>0.9, then: main transformerRate of loadHeavy load; main transformerRate of load>1, main transformerRate of loadOverload;
4) switching to feeder heavy overload: feed lineRate of load＝IMain transformer-main/IMain transformer-carrierIf: 1 is not less than feeder lineRate of load>0.9, then: feed lineRate of loadHeavy load; feed lineRate of load>1, a feeder lineRate of loadOverload; the information of the office, the station, the household, the city line, the special line and the like of each transferring-out and transferring-in feeder line;
5) and generating electronic files, printing and other functions for all the data through exporting the report.
The same or similar reference numerals correspond to the same or similar parts;
the positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A method for analyzing a batch transfer scheme of a feeder line of a power distribution network is characterized by comprising the following steps:
s1: collecting data information from a scheduling master station system: acquiring power grid CIM model data of a main network dispatching automation system and power grid CIM model data of a distribution network dispatching automation system by using a data transmission channel, and splicing the power grid model data of the main network and the distribution network; total model CIM for realizing integrated through of main distribution modelGeneral assembly；
S2: receiving main networkThe power grid operation data of the dispatching automation system and the power grid operation data of the distribution network dispatching automation system are stored, and the maximum current I of the batch transfer supply equipment and the feeder line is storedmaxAnalyzing the bearing capacity of the batch transfer scheme for contacting the opposite side equipment;
s3: receiving power grid CIM model data of a distribution network dispatching automation system, and analyzing contact relation information of distribution network feeders;
s4: setting a distribution network bus for analyzing the transfer-out equipment, selecting or controlling transformer substation or bus transfer-out equipment provided by the input or control through a model relation established by splicing the power grid model data of the main distribution network in the step S1, and analyzing the batch transfer-out power supply feeder data of the distribution networks belonging to the subordinate transfer-out equipment;
s5: determining a transfer feeder line by using the transfer power supply feeder line data obtained in the step S4, retrieving a corresponding tie switch and a corresponding opposite side feeder line according to the model connection relation obtained in the step S3, and obtaining transfer feeder line data of a tie opposite side of each transfer feeder line;
s6: determining the superior distribution network bus and power supply main transformer data of each transfer feeder according to the model connection relation obtained in the step S3 by using the transfer feeder data obtained in the step S5;
s7: and (4) comparing and analyzing the optimal transshipment scheme of the transshipment feeder line by using the data comprehensive feeder line contact relation and the parameter data obtained in the steps S2, S3, S5 and S6.
2. The method for analyzing the distribution network feeder batch transfer scheme of claim 1, wherein in the step S1, the process of splicing the main distribution network power grid model data is as follows: model splicing is carried out on the feeder data of the distribution network system head end by the distribution network feeder at the tail end of the main network system, and the identification rule of the main distribution network feeder is as follows: substation name + interval number.
3. The method for analyzing the batch transfer scheme of the feeder line of the power distribution network according to claim 2, wherein in the step S2, the maximum load current I of the device is collected according to the scheduled transfer time of the feeder line transfermaxIt is necessary to consider that the sum of the current of the feeder line added to the opposite feeder line does not exceed the pairCurrent-carrying capacity value I of side feederCarrier (turning)>IIs turned intoIIs rolled out(ii) a When n feeders of the feeders for transferring power in batches simultaneously transfer power to the same main transformer of n lines on the opposite side, the load current transferred to the main transformer is the sum of the load of the feeders and the load of the transferred feeders: i isTotal load＝IMain transformer max+IGo to 1max+IGo to 1max+IGo to 2max+IGo to 3max+ … …; the total current of the main transformer on the feeder side, which is added with the load current transferred in batches, does not exceed the quota load flow value of the main transformer: i isMain transformer-carrier>ITotal load。
4. The method for analyzing the distribution network feeder line batch transfer scheme according to claim 3, wherein in the step S3, the contact relationship of the distribution network feeder lines is core data of the distribution network feeder line batch transfer analysis, and considering that the distribution network dispatching automation system is continuously updating the distribution network line model, the contact relationship between the distribution network feeder lines is updated, and the update frequency is set to be once in 1 hour; the interconnection switch of each distribution network feeder line has various conditions, some interconnection switches do not have the power transfer capability, some interconnection switches have only 1 interconnection point, some interconnection switches have n interconnection points, and some interconnection switches are in line internal interconnection or in simultaneous interconnection with a plurality of interconnection points of a certain line, so that various conditions need to be analyzed and identified; storing the contact data of the distribution network feeder line with the contact switch: opposite side connecting lines and connecting points.
5. The method for analyzing the distribution network feeder batch transfer scheme according to claim 4, wherein in step S4, the process of analyzing the batch transfer feeder data of the distribution networks belonging to the subordinate transfer device jurisdiction thereof is as follows:
1) the transfer-out device is set as follows: the bus is the superior power supply equipment of a power supply feeder line, so the needed transfer-out equipment must comprise a distribution network bus;
2) and through the topological connection relation, performing correlation analysis on the selected distribution network bus to obtain a distribution network feeder list belonging to the jurisdiction of the transferred equipment.
6. The method for analyzing the distribution network feeder batch transfer scheme of claim 5, wherein the specific process of the step S7 is as follows:
1) screening the transfer-out feeder lines without contact relation in batch transfer without carrying out transfer scheme analysis;
2) and the batch transferring-out line with the connection relation analyzes the opposite sides of all the connection switches to be transferred into the feeder line:
A) if the first record of the opposite side line is one of the batch transfer feeder lines is not analyzed;
B) determining that the opposite side line is not one of batch transfer-out feeders as a transfer-in feeder, and determining that 1 transfer-out scheme exists if only 1 line exists;
C) if one transfer-out feeder line has a plurality of interconnection switches and the opposite side meets the condition B, determining that a plurality of transfer-out schemes exist;
3) for the outgoing feeder line with the contact relation in the step 2), although belonging to the condition of the point A in the step 2), the incoming feeder line at the opposite side meets the condition of the step 2) in other feeder line analysis in the batch outgoing feeder line, and the incoming feeder line at the opposite side of the contact line is considered as the incoming feeder line of the line, wherein the outgoing feeder line can indirectly have outgoing power supply capacity;
4) for the situation of step C of step 2) in the above 2) with contact relation, in the intelligent analysis method, priority ordering needs to be carried out on a plurality of contralateral transfer feeder lines capable of carrying out contact transfer power supply;
5) for the interconnection contralateral transfer feeder and the main transformer of the transfer-out feeder, after the transfer-in feeder is selected by considering the determined highest priority, the interconnection contralateral transfer feeders of a plurality of transfer-out feeders are the same line, and when the total transfer-in load current margin of the transfer-out feeders is analyzed and calculated, a plurality of transfer-in objects, namely I need to be simultaneously considered in a combined mannerIs turned into＝ITurned out to 1+IRoll-out 2+ … …；
6) And for the intelligent analysis output of the system feeder batch transfer scheme, m transfer-out and n transfer-out final results are given according to the synchronous analysis results 1) to 5), wherein m represents that a plurality of interconnection switches can be transferred, and n represents that only a plurality of interconnection transfer conditions can be transferred.
7. A method for analysis of a power distribution network feeder batch transfer scheme as claimed in claim 6 wherein the transfer out condition is one of:
1) and can be directly rotated: the feeder line can be directly transferred to the opposite side feeder line of the transfer feeder line under the non-transfer equipment through the interconnection switch, namely the feeder line cannot be directly transferred to the local side feeder line to be transferred to supply power in batches;
2) and can be linked to rotate: although the feeder line can not be directly transferred to the opposite side feeder line of the non-transfer feeder line, the feeder line is connected with the batch transfer feeder line which can be directly transferred, and the indirect transfer power supply, commonly called as 'secondary connection', can be realized by firstly transferring the contact power to the batch transfer feeder line which can be directly transferred;
3) and can not be rotated: although the interconnection switch can be connected, the interconnection relation is that the feeder line on the opposite side is a transfer-out feeder line to be transferred to supply power in batches, so the transfer-supply scheme belongs to the condition of non-transferable power supply;
4) and no communication: the transfer feeder line to be transferred to the power supply in batches has no interconnection switch, and the transfer power supply cannot be implemented.
8. The method for analyzing the batch transfer scheme of the feeder line of the power distribution network according to claim 7, wherein the optimal transfer scheme sequence is obtained in step S7, and the method comprises the following steps:
①, current carrying capacity I respectively transferred from and to the feeder lineLoad inMaximum load current IOut max、IGo to maxWhether the interconnection switch has data such as remote control function;
② calculating the current carrying capacity I of the incoming feeder line on multiple contact opposite sides of the outgoing feeder lineCarrierMinus its maximum load current IInto maxThe remaining load current margin IYu＝ICarrier-IGo to maxObtaining the transferable current margin, and subtracting the load current I of each transfer feedermaxObtaining the total load margin I of the switching feeder line from the contact opposite sideGeneral Yu＝IYu-IRotate out 1max-IIs rolled out1max(ii) a Each total transfer margin may be positive or negative, i.e. an overload number;
③, sorting the total load current margin of the incoming feeder line according to positive and negative dimensions, using the positive value as the preferential incoming feeder line, and remotely controlling the incoming feeder line according to the interconnection switch and obtaining the total margin condition value IGeneral YuMaximum, as the highest priority and so on; if the number is negative, the overload of the switching-in feeder on the opposite contact side can be caused after switching-in, the switching-in feeder is arranged behind, the switching-in feeder is remotely controlled according to the contact switch, the minimum value of the total margin condition is used as the highest priority, and the like.
9. The method for analyzing the batch feeder transfer scheme of the power distribution network of claim 8, wherein the method further analyzes the relevant dimensional data of the batch feeder transfer scheme, including the number of the outgoing devices, the outgoing feeder lines and the batch transfer condition, and the statistical information related to the load and the user, and further includes the statistical information related to the load and the user, of the incoming devices and the feeder lines on the opposite side of the contact of each feeder line.
10. A method for analysis of a power distribution network feeder bulk transfer scheme as claimed in claim 9 wherein secondary connectivity takes into account that the contralateral transfer feeder needs to carry the full load of three feeders, i.e. IGeneral assembly＝ITurned out to 1+IRoll-out 2。
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