CN116109214B - Multi-dimensional analysis method and system for power supply capacity of distribution network line - Google Patents

Multi-dimensional analysis method and system for power supply capacity of distribution network line Download PDF

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CN116109214B
CN116109214B CN202310383243.7A CN202310383243A CN116109214B CN 116109214 B CN116109214 B CN 116109214B CN 202310383243 A CN202310383243 A CN 202310383243A CN 116109214 B CN116109214 B CN 116109214B
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network line
line
power supply
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CN116109214A (en
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邱桂华
吴龙腾
汤志锐
区伟潮
周俊宇
邝梓佳
肖锋
郭志燊
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Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Abstract

The invention discloses a multidimensional analysis and analysis method and a multidimensional analysis and analysis system for distribution network line power supply capacity, which are based on acquired distribution network line connection account data and distribution network line load operation data, analyze the power supply capacity of a distribution network line from multiple dimensions of one-time rotatable port power supply capacity of the distribution network line, two-time rotatable port power supply capacity of the distribution network line, direct-transfer-supply-considered distribution network line full-caliber power supply capacity and indirect-transfer-considered distribution network line full-caliber power supply capacity analysis results, provide accurate data support for grid transformation of a distribution network, greatly improve distribution network operation management level, provide a basis for guaranteeing reliable power supply of power users, and realize intelligent, accurate and comprehensive analysis of the distribution network line power supply capacity so as to provide effective guidance for distribution network line planning.

Description

Multi-dimensional analysis method and system for power supply capacity of distribution network line
Technical Field
The invention relates to the technical field of power data analysis of distribution networks, in particular to a multidimensional analysis method and system for power supply capacity of distribution network lines.
Background
The distribution network is directly responsible for supplying power to power users, and the grid structure level of the distribution network directly influences the power supply reliability of the power users. In order to ensure reliable power supply of users, power supply enterprise power grid planning personnel need to analyze the power supply capacity of distribution network lines every year, and the distribution network frame structure of the lines with poor power supply capacity is improved as soon as possible through transformation.
For the analysis of power supply of the distribution network lines, a power grid planner needs to analyze whether the load of the power supply of the distribution network lines can be quickly transferred to other lines to duplicate electricity as an evaluation basis under the condition of faults or voltage loss according to the load of each line and the connection condition of the lines. Because the number of the distribution network lines is huge, and meanwhile, the analysis of the power supply capacity relates to complex and complicated data such as loads, connection conditions and the like, so that the workload of the analysis of the power supply capacity of the distribution network lines is huge, the power grid planning personnel can not accurately and comprehensively analyze the power supply capacity of the distribution network lines, and effective guidance is difficult to provide for the planning of the distribution network lines. Therefore, the novel distribution network line power supply capacity analysis method is used for intelligently, accurately and comprehensively analyzing the distribution network line power supply capacity so as to provide effective guidance for distribution network line planning, and is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention provides a multidimensional analysis method and a multidimensional analysis system for power supply capacity of a distribution network line, which are used for intelligently, accurately and comprehensively analyzing the power supply capacity of the distribution network line so as to provide effective guidance for planning the distribution network line.
In view of the foregoing, a first aspect of the present invention provides a multidimensional analysis method for power supply capability of a distribution network line, including:
acquiring distribution network line connection ledger data and distribution network line load operation data;
based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is completely transferred to any connection line to transfer power to cause overload of a contralateral line, and obtaining a distribution network line primary rotatable aperture power supply capacity analysis result;
based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is simultaneously and completely transferred to any two connection lines to supply power to cause overall overload of any two opposite lines, and obtaining a distribution network line twice-rotatable port power supply capacity analysis result;
based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is simultaneously and completely transferred to directly connected line power supply to cause overall overload of the opposite-side direct connection line, and obtaining a distribution network line full-caliber power supply capacity analysis result considering direct transfer supply;
Based on the distribution network line connection ledger data and the distribution network line load operation data, analyzing whether the distribution network line load is simultaneously and completely transferred to a direct connection line and an indirectly connected line power supply can cause the overall overload of a contralateral line, and obtaining the analysis result of the full-caliber power supply capacity of the distribution network line considering the indirect transfer supply.
Optionally, the method further comprises:
and carrying out data output display on the analysis result of the once-rotatable aperture power supply capacity of the distribution network line, the analysis result of the twice-rotatable aperture power supply capacity of the distribution network line, the analysis result of the full-aperture power supply capacity of the distribution network line considering direct transfer supply and the analysis result of the full-aperture power supply capacity of the distribution network line considering indirect transfer supply.
Optionally, the method further comprises:
counting a distribution network line once-rotatable aperture power supply capacity analysis result, a distribution network line twice-rotatable aperture power supply capacity analysis result, a distribution network line full-caliber power supply capacity analysis result considering direct transfer supply and a distribution network line full-caliber power supply capacity analysis result considering indirect transfer supply of each distribution network line;
if any power supply capacity analysis result is defined that the distribution network line meets the condition that the distribution network line on the side can be supplied, the power supply capacity analysis result of the distribution network line is defined that the distribution network line meets the condition that the distribution network line on the side can be supplied.
Optionally, obtaining the distribution network line connection ledger data and the distribution network line load operation data includes:
based on the connection points of the distribution network lines, acquiring the whole distribution network line connection ledger data formed by the distribution network lines through each connection point, wherein the distribution network line connection ledger data comprises the current-carrying capacity of the line of the distribution network and the current-carrying capacity of the line of the opposite side;
and acquiring the peak load current value of the current line of the current distribution line and the peak load current value of the opposite side line at the peak time of the whole region by acquiring the current value at one point every 15 minutes.
Optionally, based on the distribution network line connection ledger data and the distribution network line load operation data, analyzing whether the distribution network line load is completely transferred to any connection line transfer power to cause overload of a contralateral line, to obtain a distribution network line primary rotatable port power supply capacity analysis result, including:
based on distribution network line connection ledger data and distribution network line load operation data, calculating the load rate of the opposite side line after the distribution network line load is completely transferred to any connection line to be powered according to a first load rate calculation formula, wherein the first load rate calculation formula is as follows:
Figure SMS_1
；
wherein,,
Figure SMS_2
for the load rate of the opposite side line after power supply is turned on, < + >>
Figure SMS_3
For the peak load current value of the current line of the present side, +. >
Figure SMS_4
For the peak load current value of the opposite side line, +.>
Figure SMS_5
The current-carrying capacity of the opposite-side line is adopted;
for each distribution network line, if the load rate of all opposite side lines is changed after power supply is turned
Figure SMS_6
If the power supply capacity of the distribution network line is greater than 100%, defining that the distribution network line meets the condition that the distribution network line at the side cannot be supplied, and if the distribution network line is supplied with power after being supplied with power, the load rate of any opposite side line is equal to the load rate of any opposite side line>
Figure SMS_7
And if the power supply capacity is not more than 100%, defining that the distribution network line can be turned once, and determining that the distribution network line meets the turning condition of the distribution network line at the current side.
Optionally, based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is transferred to any two connection lines simultaneously to supply power to cause total overload of any two opposite lines, to obtain a distribution network line twice-rotatable aperture power supply capacity analysis result, including:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating the distribution network line load according to a second load rate calculation formula, and simultaneously transferring the distribution network line load to a first total load rate of the opposite side line after power supply of any two connection lines, wherein the second load rate calculation formula is as follows:
Figure SMS_8
；
Wherein,,
Figure SMS_9
for the first total load rate of the contralateral line after power supply transfer,>
Figure SMS_10
for the first opposite side line peak load current value, < > about->
Figure SMS_11
For the second opposite line peak load current value, < > about->
Figure SMS_12
For the current-carrying capacity of the first contralateral line, +.>
Figure SMS_13
The current-carrying capacity of the second opposite-side line;
for any two connecting lines, if the power is turned over, the first total load rate of all opposite-side lines
Figure SMS_14
If the two-time rotatable opening power supply capacity of the distribution network line is greater than 100%, defining that the distribution network line meets the condition that the distribution network line at the side cannot be supplied, and if any connecting line is supplied with power in a converting manner, determining that the distribution network line has the first total load rate of any opposite side line>
Figure SMS_15
And if the power supply capacity is not more than 100%, defining that the distribution network line meets the distribution network line switching condition at the current side according to the analysis result of the two-time switching aperture power supply capacity of the distribution network line.
Optionally, based on the distribution network line connection ledger data and the distribution network line load operation data, analyzing whether the distribution network line load is simultaneously and completely transferred to the directly connected line power supply to cause the overall overload of the opposite-side direct connection line, to obtain the distribution network line full-caliber power supply capacity analysis result considering the direct transfer supply, including:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating a second overall load rate of the distribution network line load which is simultaneously transferred to the directly connected line power supply opposite side line according to a third load rate calculation formula, wherein the third load rate calculation formula is as follows:
Figure SMS_16
；
Wherein,,
Figure SMS_17
for a second overall load rate of the contralateral line after switching power supply,>
Figure SMS_18
is the firstNStrip opposite side line peak load current value, +.>
Figure SMS_19
Is the firstNThe current-carrying capacity of the opposite side line,Nthe number of the opposite side lines;
if the second overall load rate is
Figure SMS_20
If the power supply capacity is more than 100%, defining that the distribution network line meets the condition that the distribution network line on the side cannot be supplied by the distribution network line according to the analysis result of the full-caliber power supply capacity of the distribution network line considering direct transfer supply, otherwise, defining that the distribution network line meets the distribution network line on the side according to the analysis result of the full-caliber power supply capacity of the distribution network line considering direct transfer supplyWay-available conditions.
Optionally, based on the distribution network line connection ledger data and the distribution network line load operation data, analyzing whether the distribution network line load is simultaneously and completely transferred to the direct connection line and the indirectly connected line power supply can cause the overall overload of the opposite side line, to obtain the distribution network line full-caliber power supply capacity analysis result considering the indirect transfer supply, including:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating a third overall load rate of the distribution network line load which is simultaneously transferred to the direct connection line and the indirect connection line after power supply according to a fourth load rate calculation formula, wherein the fourth load rate calculation formula is as follows:
Figure SMS_21
；
Wherein,,
Figure SMS_22
for a third overall load rate of the contralateral line after switching power supply,>
Figure SMS_23
is the firstMStrip opposite side line peak load current value, +.>
Figure SMS_24
Is the firstMThe current-carrying capacity of the opposite side line,Mthe number of lines which are in direct connection with the distribution network lines and in indirect connection with the distribution network lines;
if the third overall load rate
Figure SMS_25
If the power supply capacity is more than 100%, defining that the distribution network line with the consideration of the indirect transfer supply meets the condition that the distribution network line at the current side cannot be transferred, otherwise, defining that the distribution network line with the consideration of the indirect transfer supply meets the condition that the distribution network line at the current side can be transferred.
Optionally, data output display is performed on a distribution network line once-rotatable aperture power supply capability analysis result, a distribution network line twice-rotatable aperture power supply capability analysis result, a distribution network line full-aperture power supply capability analysis result considering direct transfer supply, and a distribution network line full-aperture power supply capability analysis result considering indirect transfer supply, including:
displaying a distribution network line once-rotatable aperture power supply capacity analysis result, a distribution network line twice-rotatable aperture power supply capacity analysis result, a distribution network line full-caliber power supply capacity analysis result considering direct transfer supply and a distribution network line full-caliber power supply capacity analysis result considering indirect transfer supply of each distribution network line, and displaying a regional office, a power supply station and a transformer substation to which each distribution network line belongs;
Counting and displaying the number of distribution network lines meeting the condition that the distribution network lines on the side can be switched and the condition that the distribution network lines on the side cannot be switched in each regional office and each power supply station;
dividing the number of all distribution network lines meeting the current side distribution network line rotatable supply condition of each regional office by the total distribution network line number of each regional office to obtain the distribution network line rotatable supply proportion of each regional office, and displaying the distribution network line rotatable supply proportion of each regional office;
dividing the number of distribution network lines meeting the condition that the distribution network lines can be turned on at the side of each power supply station by the total number of distribution network lines of each power supply station to obtain the rotatable power supply proportion of the distribution network lines of each power supply station, and displaying the rotatable power supply proportion of the distribution network lines of each power supply station.
The second aspect of the present invention provides a multidimensional analysis system for power supply capacity of a distribution network line, comprising:
the data acquisition unit is used for acquiring distribution network line connection ledger data and distribution network line load operation data;
the first power supply capacity analysis unit is used for analyzing whether the load of the distribution network line is completely transferred to any connecting line to transfer power to cause overload of a contralateral line or not based on the distribution network line connecting ledger data and the distribution network line load operation data, and obtaining a distribution network line primary rotatable aperture power supply capacity analysis result;
The second power supply capacity analysis unit is used for analyzing whether the load of the distribution network line is transferred to any two connecting lines at the same time to cause the overall overload of any two opposite lines or not based on the distribution network line connection account data and the distribution network line load operation data, so as to obtain a distribution network line twice-rotatable aperture power supply capacity analysis result;
the third power supply capacity analysis unit is used for analyzing whether the line load of the distribution network is simultaneously and completely transferred to the directly connected line power supply to cause the overall overload of the opposite-side direct connection line or not based on the line connection ledger data of the distribution network and the line load operation data of the distribution network, so as to obtain a full-caliber power supply capacity analysis result of the distribution network considering direct transfer supply;
and the fourth power supply capacity analysis unit is used for analyzing whether the power supply of the lines of the distribution network, which are simultaneously and completely transferred to the direct connection lines and the indirect connection lines, causes the overall overload of the opposite-side lines or not based on the connection standing account data of the lines of the distribution network and the load operation data of the lines of the distribution network, so as to obtain the analysis result of the full-caliber power supply capacity of the lines of the distribution network, which considers the indirect transfer supply.
Optionally, the method further comprises:
the data display unit is used for outputting and displaying data of the analysis result of the once-rotatable aperture power supply capacity of the distribution network line, the analysis result of the twice-rotatable aperture power supply capacity of the distribution network line, the analysis result of the full-aperture power supply capacity of the distribution network line considering direct transfer supply and the analysis result of the full-aperture power supply capacity of the distribution network line considering indirect transfer supply.
Optionally, the method further comprises:
the statistics unit is used for counting a distribution network line once-rotatable aperture power supply capacity analysis result, a distribution network line twice-rotatable aperture power supply capacity analysis result, a distribution network line full-aperture power supply capacity analysis result considering direct transfer supply and a distribution network line full-aperture power supply capacity analysis result considering indirect transfer supply of each distribution network line, and if any power supply capacity analysis result is defined that the distribution network line meets the local side distribution network line rotatable supply condition, the power supply capacity analysis result of the distribution network line is defined that the distribution network line meets the local side distribution network line rotatable supply condition.
Optionally, the data acquisition unit is specifically configured to:
based on the connection points of the distribution network lines, acquiring the whole distribution network line connection ledger data formed by the distribution network lines through each connection point, wherein the distribution network line connection ledger data comprises the current-carrying capacity of the line of the distribution network and the current-carrying capacity of the line of the opposite side;
and acquiring the peak load current value of the current line of the current distribution line and the peak load current value of the opposite side line at the peak time of the whole region by acquiring the current value at one point every 15 minutes.
Optionally, the first power supply capability analysis unit is specifically configured to:
based on distribution network line connection ledger data and distribution network line load operation data, calculating the load rate of the opposite side line after the distribution network line load is completely transferred to any connection line to be powered according to a first load rate calculation formula, wherein the first load rate calculation formula is as follows:
Figure SMS_26
；
Wherein,,
Figure SMS_27
for the load rate of the opposite side line after power supply is turned on, < + >>
Figure SMS_28
For the peak load current value of the current line of the present side, +.>
Figure SMS_29
For the peak load current value of the opposite side line, +.>
Figure SMS_30
The current-carrying capacity of the opposite-side line is adopted;
for each distribution network line, if the load rate of all opposite side lines is changed after power supply is turned
Figure SMS_31
If the power supply capacity of the primary rotatable aperture of the distribution network line is greater than 100%, defining that the distribution network line meets the condition that the distribution network line at the side is not rotatable, and if the distribution network line is rotatable, any negative line at the opposite side is providedLoad rate->
Figure SMS_32
And if the power supply capacity is not more than 100%, defining that the distribution network line can be turned once, and determining that the distribution network line meets the turning condition of the distribution network line at the current side.
Optionally, the second power supply capability analysis unit is specifically configured to:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating the distribution network line load according to a second load rate calculation formula, and simultaneously transferring the distribution network line load to a first total load rate of the opposite side line after power supply of any two connection lines, wherein the second load rate calculation formula is as follows:
Figure SMS_33
；
wherein,,
Figure SMS_34
for the first total load rate of the contralateral line after power supply transfer,>
Figure SMS_35
for the first opposite side line peak load current value, < > about->
Figure SMS_36
For the second opposite line peak load current value, < > about- >
Figure SMS_37
For the current-carrying capacity of the first contralateral line, +.>
Figure SMS_38
The current-carrying capacity of the second opposite-side line;
for any two connecting lines, if the power is turned over, the first total load rate of all opposite-side lines
Figure SMS_39
If the two-time rotatable opening power supply capacity of the distribution network line is greater than 100%, defining that the distribution network line meets the condition that the distribution network line at the current side is not rotatableIf there is a first total load rate of any opposite line after any connecting line is powered up>
Figure SMS_40
And if the power supply capacity is not more than 100%, defining that the distribution network line meets the distribution network line switching condition at the current side according to the analysis result of the two-time switching aperture power supply capacity of the distribution network line.
Optionally, the third power supply capability analysis unit is specifically configured to:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating a second overall load rate of the distribution network line load which is simultaneously transferred to the directly connected line power supply opposite side line according to a third load rate calculation formula, wherein the third load rate calculation formula is as follows:
Figure SMS_41
；
wherein,,
Figure SMS_42
for a second overall load rate of the contralateral line after switching power supply,>
Figure SMS_43
is the firstNStrip opposite side line peak load current value, +.>
Figure SMS_44
Is the firstNThe current-carrying capacity of the opposite side line,Nthe number of the opposite side lines;
if the second overall load rate is
Figure SMS_45
If the power supply capacity is more than 100%, defining that the distribution network line with direct transfer supply is considered as the distribution network line meeting the condition that the distribution network line on the side cannot be transferred, otherwise, defining that the distribution network line with direct transfer supply is considered as the distribution network line meeting the condition that the distribution network line on the side can be transferred.
Optionally, the fourth power supply capability analysis unit is specifically configured to:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating a third overall load rate of the distribution network line load which is simultaneously transferred to the direct connection line and the indirect connection line after power supply according to a fourth load rate calculation formula, wherein the fourth load rate calculation formula is as follows:
Figure SMS_46
；
wherein,,
Figure SMS_47
for a third overall load rate of the contralateral line after switching power supply,>
Figure SMS_48
is the firstMStrip opposite side line peak load current value, +.>
Figure SMS_49
Is the firstMThe current-carrying capacity of the opposite side line,Mthe number of lines which are in direct connection with the distribution network lines and in indirect connection with the distribution network lines;
if the third overall load rate
Figure SMS_50
If the power supply capacity is more than 100%, defining that the distribution network line with the consideration of the indirect transfer supply meets the condition that the distribution network line at the current side cannot be transferred, otherwise, defining that the distribution network line with the consideration of the indirect transfer supply meets the condition that the distribution network line at the current side can be transferred.
Optionally, the data display unit is specifically configured to:
displaying a distribution network line once-rotatable aperture power supply capacity analysis result, a distribution network line twice-rotatable aperture power supply capacity analysis result, a distribution network line full-caliber power supply capacity analysis result considering direct transfer supply and a distribution network line full-caliber power supply capacity analysis result considering indirect transfer supply of each distribution network line, and displaying a regional office, a power supply station and a transformer substation to which each distribution network line belongs;
counting and displaying the number of distribution network lines meeting the condition that the distribution network lines on the side can be switched and the condition that the distribution network lines on the side cannot be switched in each regional office and each power supply station;
dividing the number of all distribution network lines meeting the current side distribution network line rotatable supply condition of each regional office by the total distribution network line number of each regional office to obtain the distribution network line rotatable supply proportion of each regional office, and displaying the distribution network line rotatable supply proportion of each regional office;
dividing the number of distribution network lines meeting the condition that the distribution network lines can be turned on at the side of each power supply station by the total number of distribution network lines of each power supply station to obtain the rotatable power supply proportion of the distribution network lines of each power supply station, and displaying the rotatable power supply proportion of the distribution network lines of each power supply station.
From the above technical scheme, the multidimensional analysis method and system for the power supply capacity of the distribution network line provided by the invention have the following advantages:
according to the multidimensional analysis method for the distribution network line power supply capacity, based on the acquired distribution network line connection account data and distribution network line load operation data, the distribution network line power supply capacity can be changed once, the distribution network line power supply capacity can be changed twice, the distribution network line full-caliber power supply capacity of direct transfer supply is considered, and the distribution network line full-caliber power supply capacity analysis result of indirect transfer supply is considered to analyze the distribution network line power supply capacity, so that accurate data support is provided for distribution network frame transformation, the operation management level of the distribution network is greatly improved, a foundation is provided for guaranteeing reliable power supply of power users, and intelligent, accurate and comprehensive analysis on the distribution network line power supply capacity is realized, so that the technical effect of effective guidance is provided for distribution network line planning.
The multidimensional analysis system for the power supply capacity of the distribution network line provided by the invention is used for executing the multidimensional analysis method for the power supply capacity of the distribution network line provided by the invention, and the obtained technical effect is the same as that of the multidimensional analysis method for the power supply capacity of the distribution network line provided by the invention, and the detailed description is omitted.
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For a clearer description of embodiments of the invention or of solutions according to the prior art, the figures which are used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the figures in the description below are only some embodiments of the invention, from which, without the aid of inventive efforts, other relevant figures can be obtained for a person skilled in the art.
Fig. 1 is a schematic flow chart of a multidimensional analysis method for power supply capacity of a distribution network line provided in the present invention;
fig. 2 is another flow chart of a multidimensional analysis method for power supply capacity of a distribution network line according to the present invention;
fig. 3 is a schematic structural diagram of a multidimensional analysis system for power supply capability of a distribution network line according to the present invention.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
For easy understanding, referring to fig. 1, an embodiment of a multi-dimensional analysis method for power supply capability of a distribution network line is provided in the present invention, including:
and 101, acquiring distribution network line connection ledger data and distribution network line load operation data.
It should be noted that, the distribution network line connection ledger data may be obtained from the power grid asset management system, and the distribution network line load operation data may be obtained from the power grid dispatching automation system. Specifically, for the distribution network line tie-up ledger data: based on the contact points of the distribution network lines, the whole distribution network line contact account data formed by the distribution network lines through each contact point is obtained, wherein the distribution network line contact account data comprises the current-carrying capacity of the side line and the current-carrying capacity of the opposite side line, and also comprises the name of the side line, the current-carrying capacity of the side line, the regional office of the side line, the power supply station of the side line, the transformer station of the side line, the position of the contact point of the side line, the contact switch of the side line, the name of the opposite side line, the current-carrying capacity of the opposite side line, the regional office of the opposite side line, the power supply station of the opposite side line, the transformer station of the opposite side line and the like. For distribution network line load operation data: and acquiring the peak load current value of the current line of the current distribution line and the peak load current value of the opposite side line at the peak time of the whole region by acquiring the current value at one point every 15 minutes.
Step 102, based on the distribution network line connection ledger data and the distribution network line load operation data, analyzing whether the distribution network line load is completely transferred to any connection line to transfer power to cause overload of a contralateral line, and obtaining a distribution network line primary rotatable port power supply capacity analysis result.
In the embodiment of the invention, based on the distribution network line connection ledger data and the distribution network line load operation data, whether the distribution network line load is completely transferred to any connection line connected with the distribution network line load is converted to power supply can cause overload of the opposite line is analyzed to analyze the primary rotatable port power supply capacity of the distribution network line. The specific implementation process is as follows:
based on distribution network line connection ledger data and distribution network line load operation data, calculating the load rate of the opposite side line after the distribution network line load is completely transferred to any connection line to be powered according to a first load rate calculation formula, wherein the first load rate calculation formula is as follows:
Figure SMS_51
；
wherein,,
Figure SMS_52
for the load rate of the opposite side line after power supply is turned on, < + >>
Figure SMS_53
For the peak load current value of the current line of the present side, +.>
Figure SMS_54
For the peak load current value of the opposite side line, +.>
Figure SMS_55
The current-carrying capacity of the opposite-side line is adopted;
for each distribution network line, if the load rate of all opposite side lines is changed after power supply is turned
Figure SMS_56
If the power supply capacity of the distribution network line is greater than 100%, defining that the distribution network line meets the condition that the distribution network line at the side cannot be supplied, and if the distribution network line is supplied with power after being supplied with power, the load rate of any opposite side line is equal to the load rate of any opposite side line>
Figure SMS_57
And if the power supply capacity is not more than 100%, defining that the distribution network line can be turned once, and determining that the distribution network line meets the turning condition of the distribution network line at the current side.
And 103, analyzing whether the load of the distribution network line is totally transferred to any two connecting lines at the same time to cause the overall overload of any two opposite lines or not based on the distribution network line connection ledger data and the distribution network line load operation data, and obtaining the analysis result of the two-time rotatable-aperture power supply capacity of the distribution network line.
In the embodiment of the invention, based on the distribution network line connection ledger data and the distribution network line load operation data, the distribution network line load is analyzed, and whether the power supply of any two connection lines connected with the distribution network line load is completely transferred to the distribution network line load can cause the total overload of any two opposite lines or not so as to analyze the power supply capacity of the distribution network line with twice-rotatable paths. The specific implementation process is as follows:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating the distribution network line load according to a second load rate calculation formula, and simultaneously transferring the distribution network line load to a first total load rate of the opposite side line after power supply of any two connection lines, wherein the second load rate calculation formula is as follows:
Figure SMS_58
；
Wherein,,
Figure SMS_59
for the first total load rate of the contralateral line after power supply transfer,>
Figure SMS_60
for the first opposite side line peak load current value, < > about->
Figure SMS_61
For the second opposite line peak load current value, < > about->
Figure SMS_62
For the current-carrying capacity of the first contralateral line, +.>
Figure SMS_63
The current-carrying capacity of the second opposite-side line;
for any two connecting lines, if the power is turned over, the first total load rate of all opposite-side lines
Figure SMS_64
If the two-time rotatable opening power supply capacity of the distribution network line is greater than 100%, defining that the distribution network line meets the condition that the distribution network line at the side cannot be supplied, and if any connecting line is supplied with power in a converting manner, determining that the distribution network line has the first total load rate of any opposite side line>
Figure SMS_65
And if the power supply capacity is not more than 100%, defining that the distribution network line meets the distribution network line switching condition at the current side according to the analysis result of the two-time switching aperture power supply capacity of the distribution network line.
And 104, analyzing whether the distribution network line load is transferred to the direct connection line power supply at the same time to cause the overall overload of the opposite-side direct connection line based on the distribution network line connection ledger data and the distribution network line load operation data, and obtaining a distribution network line full-caliber power supply capacity analysis result considering the direct transfer supply.
It should be noted that, in the embodiment of the present invention, based on the distribution network line connection ledger data and the distribution network line load operation data, the distribution network line load is analyzed and simultaneously all transferred to the line power supply directly connected with the distribution network line load, whether the overall overload of the opposite-side direct connection line is caused or not, so as to analyze and consider the full-caliber power supply capacity of the distribution network line for direct transfer. The specific implementation process is as follows:
Based on the distribution network line connection ledger data and the distribution network line load operation data, calculating a second overall load rate of the distribution network line load which is simultaneously transferred to the directly connected line power supply opposite side line according to a third load rate calculation formula, wherein the third load rate calculation formula is as follows:
Figure SMS_66
；
wherein,,
Figure SMS_67
for a second overall load rate of the contralateral line after switching power supply,>
Figure SMS_68
is the firstNStrip opposite side line peak load current value, +.>
Figure SMS_69
Is the firstNThe current-carrying capacity of the opposite side line,Nthe number of the opposite side lines;
if the second overall load rate is
Figure SMS_70
If the power supply capacity is more than 100%, defining that the distribution network line with direct transfer supply is considered as the distribution network line meeting the condition that the distribution network line on the side cannot be transferred, otherwise, defining that the distribution network line with direct transfer supply is considered as the distribution network line meeting the condition that the distribution network line on the side can be transferred.
Step 105, based on the distribution network line connection ledger data and the distribution network line load operation data, analyzing whether the distribution network line load is simultaneously and completely transferred to the direct connection line and the indirectly connected line power supply can cause the overall overload of the opposite side line, and obtaining the distribution network line full-caliber power supply capacity analysis result considering the indirect transfer supply.
It should be noted that, in the embodiment of the present invention, based on the distribution network line connection ledger data and the distribution network line load operation data, the distribution network line load is analyzed, and whether the line power supply which is simultaneously transferred to the direct connection line and the indirect connection line thereof all results in the overall overload of the opposite line is analyzed to consider the full-caliber power supply capacity of the distribution network line for indirect transfer. The specific implementation process is as follows:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating a third overall load rate of the distribution network line load which is simultaneously transferred to the direct connection line and the indirect connection line after power supply according to a fourth load rate calculation formula, wherein the fourth load rate calculation formula is as follows:
Figure SMS_71
；
wherein,,
Figure SMS_72
for a third overall load rate of the contralateral line after switching power supply,>
Figure SMS_73
is the firstMStrip opposite side line peak load current value, +.>
Figure SMS_74
Is the firstMThe current-carrying capacity of the opposite side line,Mthe number of lines which are in direct connection with the distribution network lines and in indirect connection with the distribution network lines;
if the third overall load rate
Figure SMS_75
If the power supply capacity is more than 100%, defining that the distribution network line with the consideration of the indirect transfer supply meets the condition that the distribution network line at the current side cannot be transferred, otherwise, defining that the distribution network line with the consideration of the indirect transfer supply meets the condition that the distribution network line at the current side can be transferred.
Referring to fig. 2, in an embodiment, after obtaining the analysis result of the primary rotatable aperture power supply capability of the distribution network line, the analysis result of the secondary rotatable aperture power supply capability of the distribution network line, the analysis result of the full aperture power supply capability of the distribution network line considering direct transfer supply, and/or the analysis result of the full aperture power supply capability of the distribution network line considering indirect transfer supply, the method may further include:
and 106, carrying out data output display on the analysis result of the once-rotatable aperture power supply capacity of the distribution network line, the analysis result of the twice-rotatable aperture power supply capacity of the distribution network line, the analysis result of the full aperture power supply capacity of the distribution network line considering direct transfer supply and the analysis result of the full aperture power supply capacity of the distribution network line considering indirect transfer supply.
Further, the method may further include:
step 107, counting the distribution network line once-rotatable aperture power supply capability analysis result, the distribution network line twice-rotatable aperture power supply capability analysis result, the distribution network line full-aperture power supply capability analysis result considering direct transfer supply and the distribution network line full-aperture power supply capability analysis result considering indirect transfer supply of each distribution network line, and if any power supply capability analysis result is defined that the distribution network line meets the local side distribution network line rotatable supply condition, defining the power supply capability analysis result of the distribution network line as that the distribution network line meets the local side distribution network line rotatable supply condition.
In one embodiment, based on step 107, the content of performing data output display on the analysis result of the primary rotatable aperture power supply capability of the distribution network line, the analysis result of the secondary rotatable aperture power supply capability of the distribution network line, the analysis result of the full aperture power supply capability of the distribution network line considering direct transfer supply, and the analysis result of the full aperture power supply capability of the distribution network line considering indirect transfer supply in step 106 may be specified as follows:
(1) And outputting analysis results of the power supply capacity of the distribution network line according to the dimension of the distribution network line. Specifically, a distribution network line once-rotatable aperture power supply capacity analysis result, a distribution network line twice-rotatable aperture power supply capacity analysis result, a distribution network line full-caliber power supply capacity analysis result considering direct transfer supply and a distribution network line full-caliber power supply capacity analysis result considering indirect transfer supply of each distribution network line are displayed, and a regional bureau, a power supply station and a transformer substation to which each distribution network line belongs are displayed.
(2) And outputting the analysis result of the power supply capacity of the distribution network line according to the dimensions of the regional bureau and the power supply station. Specifically:
counting and displaying the number of distribution network lines meeting the condition that the distribution network lines on the side can be switched and the condition that the distribution network lines on the side cannot be switched in each regional office and each power supply station;
Dividing the number of all distribution network lines meeting the current side distribution network line rotatable supply condition of each regional office by the total distribution network line number of each regional office to obtain the distribution network line rotatable supply proportion of each regional office, and displaying the distribution network line rotatable supply proportion of each regional office;
dividing the number of distribution network lines meeting the condition that the distribution network lines can be turned on at the side of each power supply station by the total number of distribution network lines of each power supply station to obtain the rotatable power supply proportion of the distribution network lines of each power supply station, and displaying the rotatable power supply proportion of the distribution network lines of each power supply station.
In one embodiment, the analysis of the one-time rotatable aperture power supply capability of the distribution network line, the analysis of the two-time rotatable aperture power supply capability of the distribution network line, the analysis of the full aperture power supply capability of the distribution network line considering direct transfer supply, and the analysis of the full aperture power supply capability of the distribution network line considering indirect transfer supply can be performed simultaneously or sequentially.
According to the multidimensional analysis method for the distribution network line power supply capacity, based on the acquired distribution network line connection account data and distribution network line load operation data, the distribution network line power supply capacity can be changed once, the distribution network line power supply capacity can be changed twice, the distribution network line full-caliber power supply capacity of direct transfer supply is considered, and the distribution network line full-caliber power supply capacity analysis result of indirect transfer supply is considered to analyze the distribution network line power supply capacity, so that accurate data support is provided for distribution network frame transformation, the operation management level of the distribution network is greatly improved, a foundation is provided for guaranteeing reliable power supply of power users, and intelligent, accurate and comprehensive analysis on the distribution network line power supply capacity is realized, so that the technical effect of effective guidance is provided for distribution network line planning.
For ease of understanding, referring to fig. 3, the present invention provides an embodiment of a multidimensional analysis system for power supply capability of a distribution network line, including:
the data acquisition unit is used for acquiring distribution network line connection ledger data and distribution network line load operation data;
the first power supply capacity analysis unit is used for analyzing whether the load of the distribution network line is completely transferred to any connecting line to transfer power to cause overload of a contralateral line or not based on the distribution network line connecting ledger data and the distribution network line load operation data, and obtaining a distribution network line primary rotatable aperture power supply capacity analysis result;
the second power supply capacity analysis unit is used for analyzing whether the load of the distribution network line is transferred to any two connecting lines at the same time to cause the overall overload of any two opposite lines or not based on the distribution network line connection account data and the distribution network line load operation data, so as to obtain a distribution network line twice-rotatable aperture power supply capacity analysis result;
the third power supply capacity analysis unit is used for analyzing whether the line load of the distribution network is simultaneously and completely transferred to the directly connected line power supply to cause the overall overload of the opposite-side direct connection line or not based on the line connection ledger data of the distribution network and the line load operation data of the distribution network, so as to obtain a full-caliber power supply capacity analysis result of the distribution network considering direct transfer supply;
And the fourth power supply capacity analysis unit is used for analyzing whether the power supply of the lines of the distribution network, which are simultaneously and completely transferred to the direct connection lines and the indirect connection lines, causes the overall overload of the opposite-side lines or not based on the connection standing account data of the lines of the distribution network and the load operation data of the lines of the distribution network, so as to obtain the analysis result of the full-caliber power supply capacity of the lines of the distribution network, which considers the indirect transfer supply.
Optionally, the method further comprises:
the data display unit is used for outputting and displaying data of the analysis result of the once-rotatable aperture power supply capacity of the distribution network line, the analysis result of the twice-rotatable aperture power supply capacity of the distribution network line, the analysis result of the full-aperture power supply capacity of the distribution network line considering direct transfer supply and the analysis result of the full-aperture power supply capacity of the distribution network line considering indirect transfer supply.
Optionally, the method further comprises:
the statistics unit is used for counting a distribution network line once-rotatable aperture power supply capacity analysis result, a distribution network line twice-rotatable aperture power supply capacity analysis result, a distribution network line full-aperture power supply capacity analysis result considering direct transfer supply and a distribution network line full-aperture power supply capacity analysis result considering indirect transfer supply of each distribution network line, and if any power supply capacity analysis result is defined that the distribution network line meets the local side distribution network line rotatable supply condition, the power supply capacity analysis result of the distribution network line is defined that the distribution network line meets the local side distribution network line rotatable supply condition.
Optionally, the data acquisition unit is specifically configured to:
based on the connection points of the distribution network lines, acquiring the whole distribution network line connection ledger data formed by the distribution network lines through each connection point, wherein the distribution network line connection ledger data comprises the current-carrying capacity of the line of the distribution network and the current-carrying capacity of the line of the opposite side;
and acquiring the peak load current value of the current line of the current distribution line and the peak load current value of the opposite side line at the peak time of the whole region by acquiring the current value at one point every 15 minutes.
Optionally, the first power supply capability analysis unit is specifically configured to:
based on distribution network line connection ledger data and distribution network line load operation data, calculating the load rate of the opposite side line after the distribution network line load is completely transferred to any connection line to be powered according to a first load rate calculation formula, wherein the first load rate calculation formula is as follows:
Figure SMS_76
；
wherein,,
Figure SMS_77
for the load rate of the opposite side line after power supply is turned on, < + >>
Figure SMS_78
For the peak load current value of the current line of the present side, +.>
Figure SMS_79
For the peak load current value of the opposite side line, +.>
Figure SMS_80
The current-carrying capacity of the opposite-side line is adopted;
for each distribution network line, if the load rate of all opposite side lines is changed after power supply is turned
Figure SMS_81
If the power supply capacity of the distribution network line is greater than 100%, defining that the distribution network line meets the condition that the distribution network line at the side cannot be supplied, and if the distribution network line is supplied with power after being supplied with power, the load rate of any opposite side line is equal to the load rate of any opposite side line >
Figure SMS_82
And if the power supply capacity is not more than 100%, defining that the distribution network line can be turned once, and determining that the distribution network line meets the turning condition of the distribution network line at the current side.
Optionally, the second power supply capability analysis unit is specifically configured to:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating the distribution network line load according to a second load rate calculation formula, and simultaneously transferring the distribution network line load to a first total load rate of the opposite side line after power supply of any two connection lines, wherein the second load rate calculation formula is as follows:
Figure SMS_83
；
wherein,,
Figure SMS_84
for the first total load rate of the contralateral line after power supply transfer,>
Figure SMS_85
for the first opposite side line peak load current value, < > about->
Figure SMS_86
For the second opposite line peak load current value, < > about->
Figure SMS_87
For the current-carrying capacity of the first contralateral line, +.>
Figure SMS_88
The current-carrying capacity of the second opposite-side line;
for any two connecting lines, if the power is turned over, the first total load rate of all opposite-side lines
Figure SMS_89
If the two-time rotatable opening power supply capacity of the distribution network line is greater than 100%, defining that the distribution network line meets the condition that the distribution network line at the side cannot be supplied, and if any connecting line is supplied with power in a converting manner, determining that the distribution network line has the first total load rate of any opposite side line>
Figure SMS_90
And if the power supply capacity is not more than 100%, defining that the distribution network line meets the distribution network line switching condition at the current side according to the analysis result of the two-time switching aperture power supply capacity of the distribution network line.
Optionally, the third power supply capability analysis unit is specifically configured to:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating a second overall load rate of the distribution network line load which is simultaneously transferred to the directly connected line power supply opposite side line according to a third load rate calculation formula, wherein the third load rate calculation formula is as follows:
Figure SMS_91
；
wherein,,
Figure SMS_92
for a second overall load rate of the contralateral line after switching power supply,>
Figure SMS_93
is the firstNStrip opposite side line peak load current value, +.>
Figure SMS_94
Is the firstNThe current-carrying capacity of the opposite side line,Nthe number of the opposite side lines;
if the second overall load rate is
Figure SMS_95
If the power supply capacity is more than 100%, defining that the distribution network line with direct transfer supply is considered as the distribution network line meeting the condition that the distribution network line on the side cannot be transferred, otherwise, defining that the distribution network line with direct transfer supply is considered as the distribution network line meeting the condition that the distribution network line on the side can be transferred.
If the second overall load factor is optional, the fourth power supply capability analysis unit is specifically configured to:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating a third overall load rate of the distribution network line load which is simultaneously transferred to the direct connection line and the indirect connection line after power supply according to a fourth load rate calculation formula, wherein the fourth load rate calculation formula is as follows:
Figure SMS_96
；/>
Wherein,,
Figure SMS_97
for a third overall load rate of the contralateral line after switching power supply,>
Figure SMS_98
is the firstMStrip opposite side line peak load current value, +.>
Figure SMS_99
Is the firstMThe current-carrying capacity of the opposite side line,Mthe number of lines which are in direct connection with the distribution network lines and in indirect connection with the distribution network lines;
if the third overall load rate
Figure SMS_100
If the power supply capacity is more than 100%, defining that the distribution network line with the consideration of the indirect transfer supply meets the condition that the distribution network line at the current side cannot be transferred, otherwise, defining that the distribution network line with the consideration of the indirect transfer supply meets the condition that the distribution network line at the current side can be transferred.
Optionally, the data display unit is specifically configured to:
displaying a distribution network line once-rotatable aperture power supply capacity analysis result, a distribution network line twice-rotatable aperture power supply capacity analysis result, a distribution network line full-caliber power supply capacity analysis result considering direct transfer supply and a distribution network line full-caliber power supply capacity analysis result considering indirect transfer supply of each distribution network line, and displaying a regional office, a power supply station and a transformer substation to which each distribution network line belongs;
counting and displaying the number of distribution network lines meeting the condition that the distribution network lines on the side can be switched and the condition that the distribution network lines on the side cannot be switched in each regional office and each power supply station;
Dividing the number of all distribution network lines meeting the current side distribution network line rotatable supply condition of each regional office by the total distribution network line number of each regional office to obtain the distribution network line rotatable supply proportion of each regional office, and displaying the distribution network line rotatable supply proportion of each regional office;
dividing the number of distribution network lines meeting the condition that the distribution network lines can be turned on at the side of each power supply station by the total number of distribution network lines of each power supply station to obtain the rotatable power supply proportion of the distribution network lines of each power supply station, and displaying the rotatable power supply proportion of the distribution network lines of each power supply station.
The multidimensional analysis system for the power supply capacity of the distribution network line provided by the invention is used for executing the multidimensional analysis method for the power supply capacity of the distribution network line provided by the invention, and the obtained technical effect is the same as that of the multidimensional analysis method for the power supply capacity of the distribution network line provided by the invention, and the detailed description is omitted.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. A multidimensional analysis method for power supply capacity of a distribution network line is characterized by comprising the following steps:
acquiring distribution network line connection ledger data and distribution network line load operation data;
based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is completely transferred to any connection line to transfer power to cause overload of a contralateral line, and obtaining a distribution network line primary rotatable aperture power supply capacity analysis result;
based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is simultaneously and completely transferred to any two connection lines to supply power to cause overall overload of any two opposite lines, and obtaining a distribution network line twice-rotatable port power supply capacity analysis result;
based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is simultaneously and completely transferred to directly connected line power supply to cause overall overload of the opposite-side direct connection line, and obtaining a distribution network line full-caliber power supply capacity analysis result considering direct transfer supply;
based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is simultaneously and completely transferred to a direct connection line and indirectly connected line power supply can cause overall overload of a contralateral line, and obtaining a distribution network line full-caliber power supply capacity analysis result considering indirect transfer supply;
The method for acquiring the distribution network line connection ledger data and the distribution network line load operation data comprises the following steps:
based on the connection points of the distribution network lines, acquiring the whole distribution network line connection ledger data formed by the distribution network lines through each connection point, wherein the distribution network line connection ledger data comprises the current-carrying capacity of the line of the distribution network and the current-carrying capacity of the line of the opposite side;
acquiring a current value at one point every 15 minutes to obtain a current value of the peak load of the current line of the local side and a current value of the peak load of the opposite side of each distribution network line at the peak time of the whole region;
based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is completely transferred to any connection line transfer power supply to cause overload of a contralateral line, and obtaining a distribution network line one-time rotatable aperture power supply capacity analysis result, comprising:
based on distribution network line connection ledger data and distribution network line load operation data, calculating the load rate of the opposite side line after the distribution network line load is completely transferred to any connection line to be powered according to a first load rate calculation formula, wherein the first load rate calculation formula is as follows:
Figure QLYQS_1
；
wherein,,
Figure QLYQS_2
for the load rate of the opposite side line after power supply is turned on, < + >>
Figure QLYQS_3
For the peak load current value of the current line of the present side, +. >
Figure QLYQS_4
For the peak load current value of the opposite side line, +.>
Figure QLYQS_5
The current-carrying capacity of the opposite-side line is adopted;
for each distribution network line, if the load rate of all opposite side lines is changed after power supply is turned
Figure QLYQS_6
All greater than 100%, then defineThe analysis result of the one-time rotatable aperture power supply capability of the distribution network line shows that the distribution network line meets the condition that the distribution network line at the side is not rotatable, and if the distribution network line is rotatable, the load rate of any opposite side line is +.>
Figure QLYQS_7
And if the power supply capacity is not more than 100%, defining that the distribution network line can be turned once, and determining that the distribution network line meets the turning condition of the distribution network line at the current side.
2. The method for multidimensional analysis of power supply capacity of a distribution network line according to claim 1, further comprising:
and carrying out data output display on the analysis result of the once-rotatable aperture power supply capacity of the distribution network line, the analysis result of the twice-rotatable aperture power supply capacity of the distribution network line, the analysis result of the full-aperture power supply capacity of the distribution network line considering direct transfer supply and the analysis result of the full-aperture power supply capacity of the distribution network line considering indirect transfer supply.
3. The method for multidimensional analysis of power supply capacity of a distribution network line according to claim 2, further comprising:
counting a distribution network line once-rotatable aperture power supply capacity analysis result, a distribution network line twice-rotatable aperture power supply capacity analysis result, a distribution network line full-caliber power supply capacity analysis result considering direct transfer supply and a distribution network line full-caliber power supply capacity analysis result considering indirect transfer supply of each distribution network line;
If any power supply capacity analysis result is defined that the distribution network line meets the condition that the distribution network line on the side can be supplied, the power supply capacity analysis result of the distribution network line is defined that the distribution network line meets the condition that the distribution network line on the side can be supplied.
4. The multi-dimensional analysis method for power supply capacity of a distribution network line according to claim 1, wherein based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is transferred to any two connection lines simultaneously and completely to cause overall overload of any two opposite lines, and obtaining a distribution network line twice-rotatable port power supply capacity analysis result comprises:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating the distribution network line load according to a second load rate calculation formula, and simultaneously transferring the distribution network line load to a first total load rate of the opposite side line after power supply of any two connection lines, wherein the second load rate calculation formula is as follows:
Figure QLYQS_8
；
wherein,,
Figure QLYQS_9
for the first total load rate of the contralateral line after power supply transfer,>
Figure QLYQS_10
for the first opposite side line peak load current value, < > about->
Figure QLYQS_11
For the second opposite line peak load current value, < > about->
Figure QLYQS_12
For the current-carrying capacity of the first contralateral line, +. >
Figure QLYQS_13
The current-carrying capacity of the second opposite-side line;
for any two connecting lines, if the power is turned over, the first total load rate of all opposite-side lines
Figure QLYQS_14
If the two-time rotatable opening power supply capacity of the distribution network line is greater than 100%, defining that the distribution network line meets the condition that the distribution network line at the side cannot be supplied, and if any connecting line is supplied with power in a converting manner, determining that the distribution network line has the first total load rate of any opposite side line>
Figure QLYQS_15
And if the power supply capacity is not more than 100%, defining that the distribution network line meets the distribution network line switching condition at the current side according to the analysis result of the two-time switching aperture power supply capacity of the distribution network line.
5. The multi-dimensional analysis method for power supply capacity of distribution network lines according to claim 1, wherein based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is simultaneously transferred to directly connected line power supply to cause overall overload of the opposite-side directly connected line, obtaining a distribution network line full-caliber power supply capacity analysis result considering direct transfer, comprises:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating a second overall load rate of the distribution network line load which is simultaneously transferred to the directly connected line power supply opposite side line according to a third load rate calculation formula, wherein the third load rate calculation formula is as follows:
Figure QLYQS_16
；
Wherein,,
Figure QLYQS_17
for a second overall load rate of the contralateral line after switching power supply,>
Figure QLYQS_18
is the firstNStrip opposite side line peak load current value, +.>
Figure QLYQS_19
Is the firstNThe current-carrying capacity of the opposite side line,Nthe number of the opposite side lines;
if the second overall load rate is
Figure QLYQS_20
If the power supply capacity is more than 100%, defining a distribution network line full-caliber power supply capacity analysis result considering direct transfer supplyAnd if the distribution network line meets the non-rotatable condition of the distribution network line at the side, defining the analysis result of the full-caliber power supply capacity of the distribution network line considering direct transfer supply as the distribution network line meets the rotatable condition of the distribution network line at the side.
6. The multi-dimensional analysis method for power supply capacity of distribution network lines according to claim 1, wherein based on distribution network line connection ledger data and distribution network line load operation data, analyzing whether the distribution network line load is transferred to direct connection lines and indirectly connected line power supply at the same time can cause overall overload of opposite side lines, obtaining a distribution network line full-caliber power supply capacity analysis result considering indirect transfer supply, comprises:
based on the distribution network line connection ledger data and the distribution network line load operation data, calculating a third overall load rate of the distribution network line load which is simultaneously transferred to the direct connection line and the indirect connection line after power supply according to a fourth load rate calculation formula, wherein the fourth load rate calculation formula is as follows:
Figure QLYQS_21
；
Wherein,,
Figure QLYQS_22
for a third overall load rate of the contralateral line after switching power supply,>
Figure QLYQS_23
is the firstMStrip opposite side line peak load current value, +.>
Figure QLYQS_24
Is the firstMThe current-carrying capacity of the opposite side line,Mthe number of lines which are in direct connection with the distribution network lines and in indirect connection with the distribution network lines;
if the third overall load rate
Figure QLYQS_25
Greater than 100%, definition considers indirect transferAnd if the distribution network line meets the condition that the distribution network line on the side can not be supplied, defining the distribution network line full-caliber power supply capacity analysis result considering the indirect supply as the distribution network line meets the condition that the distribution network line on the side can be supplied.
7. A multi-dimensional analysis method for power supply capacity of a distribution network line according to claim 3, wherein data output display is performed on a distribution network line once-rotatable aperture power supply capacity analysis result, a distribution network line twice-rotatable aperture power supply capacity analysis result, a distribution network line full-aperture power supply capacity analysis result considering direct transfer supply, and a distribution network line full-aperture power supply capacity analysis result considering indirect transfer supply, comprising:
displaying a distribution network line once-rotatable aperture power supply capacity analysis result, a distribution network line twice-rotatable aperture power supply capacity analysis result, a distribution network line full-caliber power supply capacity analysis result considering direct transfer supply and a distribution network line full-caliber power supply capacity analysis result considering indirect transfer supply of each distribution network line, and displaying a regional office, a power supply station and a transformer substation to which each distribution network line belongs;
Counting and displaying the number of distribution network lines meeting the condition that the distribution network lines on the side can be switched and the condition that the distribution network lines on the side cannot be switched in each regional office and each power supply station;
dividing the number of all distribution network lines meeting the current side distribution network line rotatable supply condition of each regional office by the total distribution network line number of each regional office to obtain the distribution network line rotatable supply proportion of each regional office, and displaying the distribution network line rotatable supply proportion of each regional office;
dividing the number of distribution network lines meeting the condition that the distribution network lines can be turned on at the side of each power supply station by the total number of distribution network lines of each power supply station to obtain the rotatable power supply proportion of the distribution network lines of each power supply station, and displaying the rotatable power supply proportion of the distribution network lines of each power supply station.
8. A multi-dimensional analysis system for power supply capacity of a distribution network line, comprising:
the data acquisition unit is used for acquiring distribution network line connection ledger data and distribution network line load operation data;
the first power supply capacity analysis unit is used for analyzing whether the load of the distribution network line is completely transferred to any connecting line to transfer power to cause overload of a contralateral line or not based on the distribution network line connecting ledger data and the distribution network line load operation data, and obtaining a distribution network line primary rotatable aperture power supply capacity analysis result;
The second power supply capacity analysis unit is used for analyzing whether the load of the distribution network line is transferred to any two connecting lines at the same time to cause the overall overload of any two opposite lines or not based on the distribution network line connection account data and the distribution network line load operation data, so as to obtain a distribution network line twice-rotatable aperture power supply capacity analysis result;
the third power supply capacity analysis unit is used for analyzing whether the line load of the distribution network is simultaneously and completely transferred to the directly connected line power supply to cause the overall overload of the opposite-side direct connection line or not based on the line connection ledger data of the distribution network and the line load operation data of the distribution network, so as to obtain a full-caliber power supply capacity analysis result of the distribution network considering direct transfer supply;
the fourth power supply capacity analysis unit is used for analyzing whether the power supply of the lines of the distribution network, which are simultaneously and completely transferred to the direct connection lines and the indirect connection lines, causes the overall overload of the opposite-side lines or not based on the connection ledger data of the lines of the distribution network and the load operation data of the lines of the distribution network, so as to obtain the analysis result of the full-caliber power supply capacity of the lines of the distribution network, which considers the indirect transfer supply;
the data acquisition unit is specifically configured to:
based on the connection points of the distribution network lines, acquiring the whole distribution network line connection ledger data formed by the distribution network lines through each connection point, wherein the distribution network line connection ledger data comprises the current-carrying capacity of the line of the distribution network and the current-carrying capacity of the line of the opposite side;
Acquiring a current value at one point every 15 minutes to obtain a current value of the peak load of the current line of the local side and a current value of the peak load of the opposite side of each distribution network line at the peak time of the whole region;
the first power supply capability analysis unit is specifically configured to:
based on distribution network line connection ledger data and distribution network line load operation data, calculating the load rate of the opposite side line after the distribution network line load is completely transferred to any connection line to be powered according to a first load rate calculation formula, wherein the first load rate calculation formula is as follows:
Figure QLYQS_26
；
wherein,,
Figure QLYQS_27
for the load rate of the opposite side line after power supply is turned on, < + >>
Figure QLYQS_28
For the peak load current value of the current line of the present side, +.>
Figure QLYQS_29
For the peak load current value of the opposite side line, +.>
Figure QLYQS_30
The current-carrying capacity of the opposite-side line is adopted;
for each distribution network line, if the load rate of all opposite side lines is changed after power supply is turned
Figure QLYQS_31
If the power supply capacity of the distribution network line is greater than 100%, defining that the distribution network line meets the condition that the distribution network line at the side cannot be supplied, and if the distribution network line is supplied with power after being supplied with power, the load rate of any opposite side line is equal to the load rate of any opposite side line>
Figure QLYQS_32
And if the power supply capacity is not more than 100%, defining that the distribution network line can be turned once, and determining that the distribution network line meets the turning condition of the distribution network line at the current side.
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