CN113158392A - Power distribution graphical monitoring and computing system - Google Patents
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Abstract
The invention discloses a power distribution graphical monitoring and computing system, which comprises: the device comprises a graphic display processing device, a data monitoring processing device and a feeder line calculating device. The power distribution graphical monitoring and computing system provided by the invention acquires source data for integration and platform configuration display based on graphical space statistical processing, and can compute the optimal solution of network loss based on a feeder network, so that a power distribution network is always in the optimal running state with safety, reliability, high quality, economy and high efficiency.
Description
Technical Field
The invention relates to the field of electric power guarantee, in particular to a power distribution graphical monitoring and computing system.
Background
The distribution automation utilizes a computer technology, an automatic control technology, a modern electronic technology, a communication technology and a network technology, and uses high-performance intelligent distribution equipment to integrate real-time information, off-line information, user information, power grid structural parameters and geographic information of a distribution network to form a complete automatic management system, thereby realizing monitoring, protection, control and distribution management under the conditions of normal operation and accidents of the distribution system.
Based on graphical data processing and management, a convenient and scientific management means is provided for power distribution, and on the basis, the feeder network is maintained and optimized, which is also the central importance of power distribution management.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the invention provides a power distribution graphical monitoring and computing system, which comprises: the device comprises a graphic display processing device, a data monitoring processing device and a feeder line calculating device.
The graphic display processing device is used for processing the graphic display.
A1. Graphical display
The graphic display processing device provides a geographical map with coordinates and a scale after being started, a user moves, enlarges and reduces a view-finding frame in the geographical map, a part of the geographical map after operation is displayed in the main window, and various objects on the map can be processed in various ways.
A2. Statistics of examination in space
1) And (6) checking and inquiring the space. Geographic maps, power supply system maps and attribute database information are linked through a relational database, and the graph information and the attribute information in the power distribution network can be checked in a bidirectional space mode.
2) And spatial statistics, namely performing spatial statistics of multiple modes on information in the power distribution network, wherein the spatial statistics comprises the statistics of equipment, capacity and load data in the power distribution network according to any range of a line or an area.
A3. Graphics data management
The basic geographic information graphs such as buildings, streets and the like can be directly added or deleted on the geographic graph for the graphic data.
The data monitoring and processing device is used for monitoring and processing the data.
B1. And acquiring source data. The data monitoring and processing device based on the monitoring data accesses an equipment model, monitoring data, power transmission and transformation on-line monitoring information, secondary equipment on-line monitoring data and power grid and equipment operation data from the energy management system, accesses basic management data including equipment maintenance, equipment faults, equipment defects and equipment ledgers from the intelligent scheduling management system, and acquires the equipment model, graphs, monitoring information point tables, telesignaling telemonitoring historical data and the like from the transformer substation.
B2. And (6) integrating data. Data integration of each system is completed through three stages of data acquisition, data conversion and data loading, and data import of monitoring management is achieved.
B3. And managing a platform layer. The platform layer management is used.
a. And (4) carrying out service abstraction on the complex association structure of the lower data table to form a uniform logic view for expressing the service. Wherein the upper layer application is decoupled from the underlying data table connection and performs business operations by accessing the logical view.
b. And converting and analyzing the access request of the upper layer into a calculation logic task of the bottom layer, distributing the calculation task, and collecting and feeding back a calculation result to the upper layer service.
c. And configuring automatic migration of the underlying data in different computing engines to realize acceleration of data access and computation.
B4. And (6) displaying the data. And deeply mining the monitoring operation data, the overhaul data and the defect data of the equipment through a big data analysis and calculation algorithm, performing monitoring big data association analysis, and performing trend and time sequence visualization display on data analysis results.
The feeder line calculating device is used for calculating the feeder line.
C1. All islands are processed according to feeder adjacency queues and sector queues to form a computational network.
C2. Optimizing in stages based on the computing network, and outputting a computing result.
Preferably, the operated part of the geographical map will be displayed in the main window, and various objects on the map can be processed in various ways, including.
And carrying out layered comprehensive display on a distribution line diagram of each voltage class, various equipment diagrams on the line, a single line diagram, a cable trench section diagram, a distribution station diagram, a switch station diagram and a basic topographic diagram. The graphic information has a density effect cooperative correction function; the graphic elements and colors can be freely selected and modified according to the property hierarchy; the font and the width of the virtual line and the real line have various choices; and meanwhile, the system supports dynamic road names and dynamic line names, has a function of tracking along the road, and can browse the streets and lines in the whole process.
Preferably, for the spatial query, the connection relationship of the query includes: distribution stations, distribution rooms, transformers, overhead lines, etc.; and simultaneously, auxiliary display of the connection relation of the lines can be carried out, after the lines or the equipment are selected, the lines and the equipment connected below or above the lines or the equipment are displayed, and data are provided for planning budget by measuring the distance between any points on the graph and the area enclosed by any multiple points.
Preferably, the graphic data management provides a graphic module comprising a standard distribution room, a transformer, a tower, equipment on the tower and a cable trench profile, and is freely called by a user; the graphic editing tool can edit the graphic data and the connection relation of the power distribution station, the power distribution room and the transformer, and can modify corresponding attribute database data according to the graphic data; the primary wiring diagram and the system network diagram can be modified; the geographical map can be automatically converted into an electrical map, the devices added or deleted on the geographical map are automatically and correspondingly updated on the electrical map, and meanwhile, when a switch or analysis is operated on the electrical map or the geographical map, the two maps are automatically synchronized and kept consistent.
Preferably, the three stages comprise.
And (4) data acquisition, namely extracting relevant data of each module of the system according to the structure and the type of the relevant data.
And data conversion, namely converting the format and the type of the data.
And data loading, namely loading the acquired and converted data according to a preset loading rule. And meanwhile, identifying the data, including identifying the attribute, the analysis rule and the application field of the data.
Preferably, said processing all islands according to feeder adjacency queues and zone queues to form a computational network comprises the following steps.
(1) And acquiring a calculation feeder set consisting of the feeder lines and the junctor thereof.
(2) A feeder adjacency queue and a segment queue are initialized.
(3) Calculating the distribution of the feeder line moisture collection flow; and (4) counting the total load and the transfer margin of each feeder line.
(4) And taking a feeder line, adding all trunk line sections of the feeder line into the section queue, and adding all adjacent feeder lines of the feeder line into the adjacent queue.
(5) A block is fetched from the block queue and the fetched block is removed from the block queue.
(6) And opening the downstream boundary switch of the extracted section, and taking the downstream residual network formed by the downstream boundary switch as a subset of the whole feeder line.
(7) And searching a downstream residual network to obtain all interconnection switches and all load points connected in the network, respectively storing the interconnection switches and all load points into a switch structure array and a load structure array, and sequencing the switch structure arrays, wherein the margin is from high to low. And simultaneously storing the downstream residual network into a computation island queue.
(8) And (5) taking one island from the computation island queue for computation, and if all the islands are processed, turning to (15).
(9) And sequentially taking two interconnection switches from the switch structure array as an interconnection switch combination, and calculating the optimal disconnection section switch. Two tie switches are taken in proper order as tie switch combination in the follow switch structure array, calculate the optimal disconnection section switch, include: and closing the interconnection switch combination, and determining the section switch for splitting the island as an optimal disconnection section switch by calculating the optimal ring current of two interconnection switches in the interconnection switch combination.
(10) If there are no feasible sectionalizers as the optimal disconnection sectionalizers, removing the tie switch combination from the switch structure array, and turning to (9); if all the interconnection switches are circulated completely, turning to (12); otherwise, the process goes to (11).
(11) Opening the found optimal section switch, respectively carrying out power flow verification on the two split islands, and stopping searching and utilizing the interconnection switch combination to carry out switching if no out-of-limit and low voltage exist; or other interconnection switch combinations can be continuously searched, the transfer indexes are compared finally, the switch combination with the highest transfer index is selected as the optimal transfer path, the id of the optimal section switch is recorded, and the switch (15) is transferred.
(12) The section switch is recorded into a suboptimal section switch sequence by changing the opening position when the section switch is opened, calculating the switch index.
(13) And if all the switch structure arrays finish the circulation, selecting the section switch with the highest transfer index as the suboptimal section switch.
(14) And opening the suboptimum section switch to form two new islands, adding the new islands into the computation island queue, removing the original islands, and turning to (8).
(15) The computational network consisting of all islands is output.
Preferably, the feeder calculation further comprises calculating a center point of the grid, in particular comprising.
u1. initializing the minimum path array; array length n = 0.
u2. judging whether all load points are circulated, if yes, turning to u5, otherwise, taking a load point.
u3. go back up from the load point to the power point.
u4. adding the minimum path of the load point to the minimum path array, self-increasing n by 1, and turning u2.
u5. obtaining the minimum path set of all load points, transposing all paths of the minimum path array to obtain the transposed array.
u6. the minimum paths are circulated in the transposed array, from the power supply point, one node in each minimum path is taken from the transposed array in turn, and compared with each other, whether the node numbers are equal or not is judged, if the unequal node numbers exist, the sequence formed by the front equal nodes in the unequal node numbers in the minimum paths is taken as the pivot point sequence.
The power distribution graphical monitoring and computing system provided by the invention acquires source data for integration and platform configuration display based on graphical space statistical processing, and can compute the optimal solution of network loss based on a feeder network, so that a power distribution network is always in the optimal running state with safety, reliability, high quality, economy and high efficiency.
Drawings
Fig. 1 is a structural diagram of a power distribution graphical monitoring computing system according to the present invention.
Detailed Description
As shown in fig. 1, the present invention provides a power distribution graphical monitoring computing system, which includes: the device comprises a graphic display processing device, a data monitoring processing device and a feeder line calculating device.
The graphic display processing device is used for processing the graphic display.
A1. Graphical display
The graphic display processing device provides a geographical map with coordinates and a scale after being started, a user moves, enlarges and reduces a view-finding frame in the geographical map, a part of the geographical map after operation is displayed in the main window, and various objects on the map can be processed as follows.
And carrying out layered comprehensive display on a distribution line diagram of each voltage class, various equipment diagrams on the line, a single line diagram, a cable trench section diagram, a distribution station diagram, a switch station diagram and a basic topographic diagram. The graphic information has a density effect cooperative correction function; the graphic elements and colors can be freely selected and modified according to the property hierarchy; the font and the width of the virtual line and the real line have various choices; and meanwhile, the system supports dynamic road names and dynamic line names, has a function of tracking along the road, and can browse the streets and lines in the whole process.
A2. Statistics of examination in space
1) And (6) checking and inquiring the space. Geographic maps, power supply system maps and attribute database information are linked through a relational database, and the graph information and the attribute information in the power distribution network can be checked in a bidirectional space mode. Wherein, the connection relation of the query comprises: distribution stations, distribution rooms, transformers, overhead lines, etc.; and simultaneously, auxiliary display of the connection relation of the lines can be carried out, after the lines or the equipment are selected, the lines and the equipment connected below or above the lines or the equipment are displayed, and data are provided for planning budget by measuring the distance between any points on the graph and the area enclosed by any multiple points.
2) And spatial statistics, namely performing spatial statistics of multiple modes on information in the power distribution network, wherein the spatial statistics comprises the statistics of equipment, capacity and load data in the power distribution network according to any range of a line or an area.
A3. Graphics data management
The basic geographic information graphs such as buildings, streets and the like can be directly added or deleted on the geographic graph for the graphic data. Providing a graphic module comprising a standard distribution room, a transformer, a tower, equipment on the tower and a cable trench profile for a user to freely call; the graphic editing tool can edit the graphic data and the connection relation of the power distribution station, the power distribution room and the transformer, and can modify corresponding attribute database data according to the graphic data; the primary wiring diagram, the system network diagram and the like can be modified; the geographical map can be automatically converted into an electrical map, the devices added or deleted on the geographical map are automatically and correspondingly updated on the electrical map, and meanwhile, when a switch or analysis is operated on the electrical map or the geographical map, the two maps are automatically synchronized and kept consistent.
The data monitoring and processing device is used for monitoring and processing the data.
B1. And acquiring source data. The data monitoring processing device based on the monitoring data accesses an equipment model, monitoring data, power transmission and transformation on-line monitoring information, secondary equipment on-line monitoring data (wave recording data) and power grid and equipment operation data from the energy management system, accesses basic management data including equipment maintenance, equipment faults, equipment defects and equipment ledgers from the intelligent scheduling management system, and acquires the equipment model, graphs, monitoring information point tables, remote signaling and remote control historical data and the like from the transformer substation.
B2. And (6) integrating data. The data integration of each system is completed through three stages of data acquisition, data conversion and data loading, and the data import of monitoring management is realized.
And (4) data acquisition, namely extracting relevant data of each module of the system according to the structure and the type of the relevant data.
And data conversion, namely converting the format and the type of the data.
And data loading, namely loading the acquired and converted data according to a preset loading rule. And meanwhile, identifying the data, including identifying the attribute, the analysis rule and the application field of the data.
B3. And managing a platform layer. The platform layer management is used.
a. And (4) carrying out service abstraction on the complex association structure of the lower data table to form a uniform logic view for expressing the service. Wherein the upper layer application is decoupled from the underlying data table connection and performs business operations by accessing the logical view.
b. And converting and analyzing the access request of the upper layer into a calculation logic task of the bottom layer, distributing the calculation task, and collecting and feeding back a calculation result to the upper layer service.
c. And configuring automatic migration of the underlying data in different computing engines to realize acceleration of data access and computation.
The platform layer is a technical implementation scheme which abstracts and manages bottom layer data and provides a service logic view for an upper layer on a big data platform through software. The big data analysis bottom layer accommodates data access of various data sources, the connection relation among data tables is complex, and applications on the upper layer of the platform focus on business logic and do not need to care about the data table structure of the bottom layer. In addition, different computing engines can be equipped for the large data platform due to different application requirements, for example, the distributed computing platform has strong computing capability but poor real-time performance of computing results, and the multidimensional analysis engine can perform real-time or quasi-real-time multidimensional computation but has limited computing capacity. Therefore, how to dynamically and reasonably arrange data storage and calculation according to application requirements is the basis for effective operation of a large data platform.
B4. And (6) displaying the data. And deeply mining the monitoring operation data, the overhaul data and the defect data of the equipment through a big data analysis and calculation algorithm, performing monitoring big data association analysis, and performing trend and time sequence visualization display on data analysis results.
The feeder line calculating device is used for calculating the feeder line.
C1. All islands are processed according to feeder adjacency queues and sector queues to form a computational network.
(1) And acquiring a calculation feeder set consisting of the feeder lines and the junctor thereof.
(2) A feeder adjacency queue and a segment queue are initialized.
(3) Calculating the distribution of the feeder line moisture collection flow; and (4) counting the total load and the transfer margin of each feeder line.
(4) And taking a feeder line, adding all trunk line sections of the feeder line into the section queue, and adding all adjacent feeder lines of the feeder line into the adjacent queue.
(5) A block is fetched from the block queue and the fetched block is removed from the block queue.
(6) And opening the downstream boundary switch of the extracted section, and taking the downstream residual network formed by the downstream boundary switch as a subset of the whole feeder line.
(7) And searching a downstream residual network to obtain all interconnection switches and all load points connected in the network, respectively storing the interconnection switches and all load points into a switch structure array and a load structure array, and sequencing the switch structure arrays, wherein the margin is from high to low. And simultaneously storing the downstream residual network into a computation island queue.
(8) And (5) taking one island from the computation island queue for computation, and if all the islands are processed, turning to (15).
(9) And sequentially taking two interconnection switches from the switch structure array as an interconnection switch combination, and calculating the optimal disconnection section switch. Two tie switches are taken in proper order as tie switch combination in the follow switch structure array, calculate the optimal disconnection section switch, include: and closing the interconnection switch combination, and determining the section switch for splitting the island as an optimal disconnection section switch by calculating the optimal ring current of two interconnection switches in the interconnection switch combination.
(10) If there are no feasible sectionalizers as the optimal disconnection sectionalizers, removing the tie switch combination from the switch structure array, and turning to (9); if all the interconnection switches are circulated completely, turning to (12); otherwise, the process goes to (11).
(11) Opening the found optimal section switch, respectively carrying out power flow verification on the two split islands, and stopping searching and utilizing the interconnection switch combination to carry out switching if no out-of-limit and low voltage exist; or other interconnection switch combinations can be continuously searched, the transfer indexes are compared finally, the switch combination with the highest transfer index is selected as the optimal transfer path, the id of the optimal section switch is recorded, and the switch (15) is transferred.
(12) The section switch is recorded into a suboptimal section switch sequence by changing the opening position when the section switch is opened, calculating the switch index.
(13) And if all the switch structure arrays finish the circulation, selecting the section switch with the highest transfer index as the suboptimal section switch.
(14) And opening the suboptimum section switch to form two new islands, adding the new islands into the computation island queue, removing the original islands, and turning to (8).
(15) The computational network consisting of all islands is output.
C2. Optimizing in stages based on the computing network, and outputting a computing result.
(16) And calculating initial load flow of the feeder based on the calculation feeder set, judging whether the calculation network is a looped network with more than one power supply point, and performing reactive power optimization solution on the looped power distribution network (24).
(17) Taking a feeder line from the feeder line set, and turning to (25) if all the feeder line sections are completely circulated; otherwise, setting the maximum operation mode for calculation.
(18) And entering the first stage of optimization. And taking all load points on the feeder line, and calculating the power factor of the load points. And if the power factor of the load point does not reach the preset range, calculating the low-voltage reactive compensation quantity of the load point and writing the result into a reactive compensation result array.
(19) And (5) performing load flow calculation, if no voltage out-of-limit exists, turning to (21), and otherwise, entering the second-stage optimization.
(20) And optimizing in the second stage. And calculating the secondary reactive moment or the net loss micro-increment rate. And selecting the maximum reactive moment for compensation, and calculating the compensation capacity.
(21) And calculating by taking the minimum operation mode.
(22) And calculating the load flow, and judging whether reactive power is reversely delivered.
(23) If reactive power is fed back, reducing the reactive compensation capacity, and turning to (22); otherwise go to (17).
(24) And carrying out reactive power optimization solution.
(25) And outputting a calculation result.
And performing reactive power optimization solving, including.
s1. enter data. Inputting network parameters of the dynamic power topology model, wherein the network parameters comprise node information, branch information and the like; and recording the real-time telemetering remote communication quantity, including the active and reactive output values of the generator nodes, the active and reactive load values of the load nodes and the current compensation value of the reactive compensation node.
And S2, calculating the initial power flow. And calculating the current, the network loss and the voltage qualification rate before optimization to determine the initial running state of the power system.
s3. to produce initial individuals. And calling a random function to randomly generate a group of populations within the upper limit and the lower limit of the control variable.
s4. load flow calculations are performed for each individual in the population. And performing iterative calculation, and solving the load flow result of each individual to obtain the active load flow, the reactive load flow, the voltage amplitude value of each node and the phase angle information of the line.
s5. calculating the adaptation function value. And calculating an adaptive function value of each individual according to the result of the load flow calculation, wherein the objective function is a function which minimizes the network loss of the power grid, and the smaller the calculated fitness function value is, the closer the corresponding individual is to the optimal solution.
s6. evaluation selection of good individuals. And calculating the individual selection pressure according to the individual adaptive function values, sequencing the individual selection pressure by adopting a sequencing method, and reserving a plurality of preset individuals with low selection pressure.
s7. form a new generation of individuals. And carrying out updating operation on the selected individuals to form a new generation of individuals.
The update operation is: child individual = n parent individual 1+ (1-n) parent individual 2; where n is a scale factor and can be generated by random numbers uniformly distributed over [0,1], and the sub-individuals are new generation individuals.
s8., it is determined whether a convergence condition (e.g., maximum number of updates) is satisfied. If so, proceed to the next step, otherwise go to s4.
s9. and outputting the result. And decoding the updated and reserved optimal individuals, and outputting a decoding result, a network load flow result and a network loss result together.
Preferably, the feeder calculation further includes calculating a central point of the power grid, and the calculating the central point of the power grid may be performed after step C2, or may be performed simultaneously with step C2, specifically including.
u1. initializing the minimum path array; array length n = 0.
u2. judging whether all load points are circulated, if yes, turning to u5, otherwise, taking a load point.
u3. go back up from the load point to the power point.
u4. adding the minimum path of the load point to the minimum path array, self-increasing n by 1, and turning u2.
u5. obtaining the minimum path set of all load points, transposing all paths of the minimum path array to obtain the transposed array.
u6. the minimum paths are circulated in the transposed array, from the power supply point, one node in each minimum path is taken from the transposed array in turn, and compared with each other, whether the node numbers are equal or not is judged, if the unequal node numbers exist, the sequence formed by the front equal nodes in the unequal node numbers in the minimum paths is taken as the pivot point sequence.
For example, in the case that there are two load points 10 and 12, tracing back the two load points upwards to obtain two minimum paths {10,9,8,2} and {12,9,8,2}, where the node 2 is a power point, the minimum path array is [ {10,9,8,2}, {12,9,8,2} ], the transposed array after transposing the minimum path array is [ {2,8,9,10}, {2,8.9,12} ], starting from the power point 2, taking one node from each minimum path in sequence to compare the node numbers, finding that the node numbers of the fourth nodes 10 and 12 are not equal, and then taking the sequence {2,8,9} formed by the front equal nodes of the nodes 10 and 12 as the pivot point sequence.
The graphic display processing device, the data monitoring processing device and the feeder line computing device realize device functions through corresponding processes and threads, the devices are connected through logic or electricity, and the specific functions of the devices can be realized by executing program codes stored in a memory by a physical processor.
The power distribution graphical monitoring and computing system provided by the invention acquires source data for integration and platform configuration display based on graphical space statistical processing, and can compute the optimal solution of network loss based on a feeder network, so that a power distribution network is always in the optimal running state with safety, reliability, high quality, economy and high efficiency.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A power distribution graphical monitoring computing system, comprising: a graphic display processing device, a data monitoring processing device and a feeder line calculating device, wherein,
the graphics display processing apparatus is to:
A1. graphical display
The graphic display processing device provides a geographical map with coordinates and a scale after being started, a user moves, enlarges and reduces a view-finding frame in the geographical map, a part of the geographical map after operation is displayed in the main window, and various objects on the map can be processed;
A2. statistics of examination in space
1) Checking and inquiring the space; the geographical map, the power supply system map and the attribute database information are linked through the relational database, and the graphic information and the attribute information in the power distribution network can be checked in a bidirectional space manner;
2) performing spatial statistics, namely performing spatial statistics of information in the power distribution network in multiple modes, wherein the spatial statistics comprises the statistics of equipment, capacity and load data in the power distribution network according to any range of a line or an area;
A3. graphics data management
Basic geographic information graphs such as buildings, streets and the like can be directly added or deleted on the geographic graph for the graph data;
the data monitoring and processing device is used for:
B1. acquiring source data; the data monitoring processing device based on the monitoring data accesses an equipment model, monitoring data, power transmission and transformation on-line monitoring information, secondary equipment on-line monitoring data and power grid and equipment operation data from the energy management system, accesses basic management data including equipment maintenance, equipment faults, equipment defects and equipment ledgers from the intelligent scheduling management system, and acquires the equipment model, graphs, monitoring information point tables, telesignaling telemonitoring historical data and the like from the transformer substation;
B2. integrating data; data integration of each system is completed through three stages of data acquisition, data conversion and data loading, and data import of monitoring management is realized;
B3. managing a platform layer; the platform layer management is to:
a. performing service abstraction on the complex association structure of the lower data table to form a uniform logic view for expressing services; wherein, the upper application is decoupled from the data table connection of the bottom layer, and the service operation is carried out by accessing the logic view;
b. converting and analyzing the access request of the upper layer into a calculation logic task of the bottom layer, distributing the calculation task, and collecting a calculation result to feed back to the upper layer service;
c. configuring automatic relocation of bottom data in different computing engines to realize acceleration of data access and computation;
B4. displaying data; deeply mining the monitoring operation data, the overhaul data and the defect data of the equipment through a big data analysis and calculation algorithm, performing monitoring big data association analysis, and performing trend and time sequence visualization display on data analysis results;
the feeder calculation means to:
C1. processing all islands according to the feeder line adjacent queue and the zone queue to form a computing network;
C2. optimizing in stages based on the computing network, and outputting a computing result.
2. The system of claim 1, wherein the operated partial geographic map is displayed in the main window, and a variety of processes can be performed on various objects on the map, including:
comprehensively displaying distribution line diagrams of various voltage grades, various equipment diagrams on the lines, a single line diagram, a cable trench section diagram, a distribution station diagram, a switch station diagram and a basic topographic map in a layering manner; the graphic information has a density effect cooperative correction function; the graphic elements and colors can be freely selected and modified according to the property hierarchy; the font and the width of the virtual line and the real line have various choices; and meanwhile, the system supports dynamic road names and dynamic line names, has a function of tracking along the road, and can browse the streets and lines in the whole process.
3. The system of claim 1, wherein for the spatial query, the connection relationship of the query comprises: distribution stations, distribution rooms, transformers, overhead lines, etc.; and simultaneously, auxiliary display of the connection relation of the lines can be carried out, after the lines or the equipment are selected, the lines and the equipment connected below or above the lines or the equipment are displayed, and data are provided for planning budget by measuring the distance between any points on the graph and the area enclosed by any multiple points.
4. The system of claim 1, wherein the graphical data management provides graphical modules including standard electrical distribution rooms, transformers, towers and their equipment on poles, cable trench profiles, for free recall by a user; the graphic editing tool can edit the graphic data and the connection relation of the power distribution station, the power distribution room and the transformer, and can modify corresponding attribute database data according to the graphic data; the primary wiring diagram and the system network diagram can be modified; the geographical map can be automatically converted into an electrical map, the devices added or deleted on the geographical map are automatically and correspondingly updated on the electrical map, and meanwhile, when a switch or analysis is operated on the electrical map or the geographical map, the two maps are automatically synchronized and kept consistent.
5. The system of claim 1, wherein the three stages comprise:
data acquisition, namely extracting relevant data of each module of the system according to the structure and the type of the relevant data;
data conversion, converting the data format and type;
data loading, namely loading the acquired and converted data according to a preset loading rule; and meanwhile, identifying the data, including identifying the attribute, the analysis rule and the application field of the data.
6. The system of claim 1, wherein said processing all islands according to feeder adjacency queues and segment queues to form a computational network comprises the steps of:
(1) acquiring a calculation feeder set consisting of a feeder line and a tie line thereof;
(2) initializing a feeder line adjacent queue and a section queue;
(3) calculating the distribution of the feeder line moisture collection flow; counting the total load and the transfer margin of each feeder line;
(4) taking a feeder line, adding all trunk line sections of the feeder line into a section queue, and adding all adjacent feeder lines of the feeder line into an adjacent queue;
(5) fetching a segment from the segment queue and removing the fetched segment from the segment queue;
(6) opening the downstream boundary switch of the extracted section, and taking the downstream residual network formed by the downstream boundary switch as a subset of the whole feeder line;
(7) searching a downstream residual network to obtain all interconnection switches and all load points connected in the network, respectively storing the interconnection switches and all load points into a switch structure array and a load structure array, and sequencing the switch structure arrays, wherein the margin is from high to low; simultaneously storing the downstream residual network into a computation island queue;
(8) taking one island from the computation island queue for computation, and if all the islands are processed, turning to (15);
(9) sequentially taking two interconnection switches from the switch structure array as an interconnection switch combination, and calculating an optimal disconnection section switch; two tie switches are taken in proper order as tie switch combination in the follow switch structure array, calculate the optimal disconnection section switch, include: closing the interconnection switch combination, and determining a section switch for splitting the island as an optimal disconnection section switch by calculating the optimal ring current of two interconnection switches in the interconnection switch combination;
(10) if there are no feasible sectionalizers as the optimal disconnection sectionalizers, removing the tie switch combination from the switch structure array, and turning to (9); if all the interconnection switches are circulated completely, turning to (12); otherwise, entering (11);
(11) opening the found optimal section switch, respectively carrying out power flow verification on the two split islands, and stopping searching and utilizing the interconnection switch combination to carry out switching if no out-of-limit and low voltage exist; or other interconnection switch combinations can be continuously searched, the transfer indexes are compared finally, the switch combination with the highest transfer index is selected as the optimal transfer path, the id of the optimal section switch is recorded, and the switch (15) is transferred;
(12) calculating a transfer index by changing an opening position when the section switch is opened, and recording the section switch into a suboptimal section switch sequence;
(13) if all the switch structure arrays finish the circulation, selecting the section switch with the highest transfer index as a suboptimal section switch;
(14) opening the suboptimal section switch to form two new islands, adding the new islands into a calculation island queue, removing the original islands, and turning to (8);
(15) the computational network consisting of all islands is output.
7. The system according to claim 1, wherein the feeder calculation further comprises calculating a center point of the grid, in particular comprising;
u1. initializing the minimum path array; array length n = 0;
u2., judging whether all load points are circulated, if yes, turning to u5, otherwise, selecting one load point;
u3. go back up from the load point to the power point;
u4., adding the minimum path of the load point into the minimum path array, increasing n by itself by 1, and turning u 2;
u5., obtaining a minimum path set of all load points, and transposing all paths of the minimum path array to obtain a transposed array;
u6. the minimum paths are circulated in the transposed array, from the power supply point, one node in each minimum path is taken from the transposed array in turn, and compared with each other, whether the node numbers are equal or not is judged, if the unequal node numbers exist, the sequence formed by the front equal nodes in the unequal node numbers in the minimum paths is taken as the pivot point sequence.
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| CN116975399A (en) * | 2023-09-22 | 2023-10-31 | 南京南瑞信息通信科技有限公司 | Historical state power grid geographic diagram display method and system |
| CN116975399B (en) * | 2023-09-22 | 2023-12-26 | 南京南瑞信息通信科技有限公司 | Historical state power grid geographic diagram display method and system |
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