CN104680340A - Distribution network planning method and system - Google Patents
Distribution network planning method and system Download PDFInfo
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- CN104680340A CN104680340A CN201510144904.6A CN201510144904A CN104680340A CN 104680340 A CN104680340 A CN 104680340A CN 201510144904 A CN201510144904 A CN 201510144904A CN 104680340 A CN104680340 A CN 104680340A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The invention discloses a distribution network planning method and a distribution network planning system. The method comprises the following steps: determining the point distribution and net rack of a prospective high-voltage substation and the point distribution and net rack of a recent high-voltage substation according to the load prediction level in a newly established region, wherein the load prediction level comprises the substation and feeder line load level; determining a medium-voltage reliability weak link concentration region; quantitatively determining the distribution network safety weak link; and formulating a targeted distribution network planning project according to the point distribution and net rack of the prospective high-voltage substation and the point distribution and net rack of the recent high-voltage substation in the newly established region, the medium-voltage reliability problem concentration substation and the distribution network safety weak link, so that a preset reliability target is achieved, and the power supply reliability requirement is met. According to the technical scheme, the technical problems in the prior art that the power supply reliability of the distribution network planning project is low and the lean requirements of users on the power supply are effectively solved.
Description
Technical field
The application relates to electric power electric technical field, particularly relates to a kind of distribution network planning method and system.
Background technology
Along with socioeconomic development, the lean desirability of user to power supply is more and more higher, and can " improve planning leading action, guide the development of the lean of electrical network " be the up-to-date demand of Electric Power Network Planning.
In existing distribution network planning method, usually first carry out power distribution network As-Is analysis, to determine electrical network weak link and load level, then according to the electrical network weak link determined and load level, carry out project planning targetedly.But, due to above-mentioned electrical network weak link normally security weak link qualitatively, do not comprise weak links of reliability; Simultaneously, because above-mentioned network load level does not comprise the load level of transformer station and feeder line, cause the power supply reliability of the distribution network planning project made according to above-mentioned electrical network weak link and load level low with this, the lean demand of user to power supply can not be met.
Summary of the invention
In view of this, this application provides a kind of distribution network planning method and system, low with the power supply reliability solving distribution network planning project in prior art, the technical matters of user to the lean demand of power supply can not be met.
For solving the problems of the technologies described above, the application provides a kind of distribution network planning method, comprising:
According to newly-built regional prediction load level, determine that distant view high voltage substation is layouted and rack, in the recent period high voltage substation are layouted and rack, to meet load growth requirement; Wherein, described prediction load level comprises transformer station and feeder load level;
The theoretical reliability of centering pressure feeder line is estimated, determines that middle pressure integrity problem concentrates transformer station, to determine middle pressure weak links of reliability concentrated area;
For main transformer, transformer station, quantitative test power distribution network power supply safety level, to determine security of distribution network weak link;
To layout according to described newly-built region distant view high voltage substation and rack, in the recent period high voltage substation are layouted and rack, middle pressure integrity problem concentrate transformer station and security of distribution network weak link, formulate distribution network planning project targetedly, to reach default reliability objectives and to meet power supply reliability demand.
In said method, preferably, according to newly-built regional prediction load level, determine that recent high voltage substation is layouted and rack, comprising:
Reference load increases S type curve, predicts in the recent period and succeeding year load level;
According to the recent of prediction and succeeding year load level, determine the power transformation capacity needed for nearly 5 years and transformer station's seat number;
Determine that recent high voltage substation is layouted and rack.
In said method, preferably, according to newly-built regional prediction load level, determine that distant view high voltage substation is layouted and rack, comprising:
According to newly-built regional prediction load level.Utilize and preset directive/guide capacity-load ratio limit value, determine the power transformation capacity needed for described newly-built region;
Utilize described power transformation capacity, determine transformer station's seat number;
With reference to actual power demand and power supply technique, siting analysis is carried out to transformer station, determines site and the arrangement form of transformer station;
With reference to the High-Voltage Network shelf structure principle of high one-level substation location and each power supply enterprise, determine rack construction scheme.
In said method, preferably, 4, method as claimed in claim 3, it is characterized in that, utilize the power transformation capacity that following formula is determined needed for described newly-built region:
S
the upper limit=P
balance/ λ
lower limit
S
lower limit=P
balance/ λ
the upper limit
Wherein, S
the upper limit110kV power transformation maximum size needed for newly-built region; S
lower limit110kV power transformation lower bound of capacity needed for newly-built region; P
balancefor 110kV balanced load, P
balance=estimation range total load-110kV and above special varying load-220kV direct-furnish 35kV load-35kV and following power plant load; λ
the upper limit, λ
lower limitfor the capacity-load ratio upper and lower limit that directive/guide requires.
In said method, preferably, the theoretical reliability of centering pressure feeder line is estimated, determines that middle pressure integrity problem concentrates transformer station, comprising:
With reference to presetting feeder reliability decision rule, determine the feeder line of poor reliability in transformer station;
When the ratio that the feeder line number of poor reliability accounts for total outlet number is greater than predetermined threshold value, determine that described transformer station is that middle pressure integrity problem concentrates transformer station.
In said method, preferably, formulate targetedly after distribution network planning project, also comprise:
For returns of investment, qualitative assessment is carried out to described distribution network planning project, to determine whether described distribution planning project can reach default economy objectives.
Present invention also provides a kind of distribution network planning system, comprising:
Substation location and rack determining unit, for according to newly-built regional prediction load level, determine that distant view high voltage substation is layouted and rack, in the recent period high voltage substation are layouted and rack, to meet load growth requirement; Wherein, described prediction load level comprises transformer station and feeder load level;
Weak links of reliability determining unit, the theoretical reliability for centering pressure feeder line is estimated, determines that middle pressure integrity problem concentrates transformer station, to determine middle pressure weak links of reliability concentrated area;
Security weak link determining unit, for for main transformer, transformer station, quantitative test power distribution network power supply safety level, to determine security of distribution network weak link;
Distribution network planning project system cell, for to layout according to described newly-built region distant view high voltage substation and rack, in the recent period high voltage substation are layouted and rack, middle pressure integrity problem concentrate transformer station and security of distribution network weak link, formulate distribution network planning project targetedly, to reach default reliability objectives and to meet power supply reliability demand.
In said system, preferably, described substation location and rack determining unit comprise:
Recent high voltage substation is layouted and rack determination subelement, increases S type curve for reference load, predicts in the recent period and succeeding year load level; According to the recent of prediction and succeeding year load level, determine the power transformation capacity needed for nearly 5 years and transformer station's seat number; Determine that recent high voltage substation is layouted and rack;
Distant view high voltage substation is layouted and rack determination subelement, for according to newly-built regional prediction load level.Utilize and preset directive/guide capacity-load ratio limit value, determine the power transformation capacity needed for described newly-built region; Utilize described power transformation capacity, determine transformer station's seat number; With reference to actual power demand and power supply technique, siting analysis is carried out to transformer station, determines site and the arrangement form of transformer station; With reference to the High-Voltage Network shelf structure principle of high one-level substation location and each power supply enterprise, determine rack construction scheme.
In said system, preferably, described distant view high voltage substation is layouted and rack determination subelement comprises:
Computation subunit, the power transformation capacity determining needed for described newly-built region for utilizing following formula:
S
the upper limit=P
balance/ λ
lower limit
S
lower limit=P
balance/ λ
the upper limit
Wherein, S
the upper limit110kV power transformation maximum size needed for newly-built region; S
lower limit110kV power transformation lower bound of capacity needed for newly-built region; P
balancefor 110kV balanced load, P
balance=estimation range total load-110kV and above special varying load-220kV direct-furnish 35kV load-35kV and following power plant load; λ
the upper limit, λ
lower limitfor the capacity-load ratio upper and lower limit that directive/guide requires.
In said system, preferably, weak links of reliability determining unit comprises:
Poor reliability feeder line determination subelement, for reference to presetting feeder reliability decision rule, determines the feeder line of poor reliability in transformer station;
Weak links of reliability determination subelement, for when the ratio that the feeder line number of poor reliability accounts for total outlet number is greater than predetermined threshold value, determines that described transformer station is that middle pressure integrity problem concentrates transformer station.
In the distribution network planning method and system that above the application provides, prediction load level comprises transformer station and feeder load level; In introducing, press integrity problem to concentrate transformer station, determine middle pressure weak links of reliability concentrated area; Quantitative test is carried out to power distribution network power supply safety level, obtains quantitative security of distribution network weak link.According to the distribution network planning project that the above technical scheme of the application is made, effectively can solve security weak link qualitatively in prior art, not comprise the electrical network weak link of weak links of reliability, the power supply reliability of the distribution network planning project that the load level not comprising transformer station and feeder line causes is low, can not meet the technical matters of user to the lean demand of power supply.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only the embodiment of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the process flow diagram of a kind of distribution network planning embodiment of the method 1 of the application;
Fig. 2 is the process flow diagram of a kind of distribution network planning embodiment of the method 2 of the application;
Fig. 3 is the process flow diagram of a kind of distribution network planning embodiment of the method 3 of the application;
Fig. 4 is the process flow diagram of a kind of distribution network planning embodiment of the method 4 of the application;
Fig. 5 is the structured flowchart schematic diagram of a kind of distribution network planning system embodiment 1 of the application;
Fig. 6 is the load growth S type curve model schematic diagram of a kind of distribution network planning embodiment of the method 2 of the application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, be clearly and completely described the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
The core of the application is to provide a kind of distribution network planning method and system, low with the power supply reliability solving distribution network planning project in prior art, can not meet the technical matters of user to the lean demand of power supply.
In order to make those skilled in the art person understand the application's scheme better, below in conjunction with the drawings and specific embodiments, the application is described in further detail.
With reference to figure 1, show the process flow diagram of a kind of distribution network planning embodiment of the method 1 of the application, the method specifically can comprise the steps:
Step S100, according to newly-built regional prediction load level, determine that distant view high voltage substation is layouted and rack, in the recent period high voltage substation are layouted and rack, to meet load growth requirement; Wherein, described prediction load level comprises transformer station and feeder load level;
Wherein, the load in newly-built region refers to the load of newly-built block and newly-built function division, and newly-built regional construction exploitation great efforts, this region can face the surge of load.
It should be noted that, unless otherwise noted, the distribution network planning method that the application provides is mainly for high-voltage fence.
The theoretical reliability of step S101, centering pressure feeder line is estimated, determines that middle pressure integrity problem concentrates transformer station, to determine middle pressure weak links of reliability concentrated area;
In the application, can solve by newly-built high voltage substation outlet the problem that middle pressure integrity problem concentrates transformer station.
Step S102, for main transformer, transformer station, quantitative test power distribution network power supply safety level, to determine security of distribution network weak link;
Step S103, to layout according to described newly-built region distant view high voltage substation and rack, in the recent period high voltage substation are layouted and rack, middle pressure integrity problem concentrate transformer station and security of distribution network weak link, formulate distribution network planning project targetedly, to reach default reliability objectives and to meet power supply reliability demand.
In the application, formulating targetedly after distribution network planning project, can also for returns of investment, qualitative assessment is carried out to described distribution network planning project, Cost-Benefit Method specifically can be adopted to assess it, obtain returns of investment ratio (B/C), thus determine whether described distribution planning project can reach default economy objectives.
In the technical scheme that above the application provides, prediction load level comprises transformer station and feeder load level; In introducing, press integrity problem to concentrate transformer station, determine middle pressure weak links of reliability concentrated area; Quantitative test is carried out to power distribution network power supply safety level, obtains quantitative security of distribution network weak link.According to the distribution network planning project that the above technical scheme of the application is made, effectively can solve security weak link qualitatively in prior art, not comprise the electrical network weak link of weak links of reliability, the power supply reliability of the distribution network planning project that the load level not comprising transformer station and feeder line causes is low, can not meet the technical matters of user to the lean demand of power supply.
With reference to figure 2, show the process flow diagram of a kind of distribution network planning embodiment of the method 2 of the application, particularly, can be performed in step S100, according to newly-built regional prediction load level by following steps, determine that recent high voltage substation is layouted and rack:
Step S200, reference load increase S type curve, predict in the recent period and succeeding year load level;
Wherein, as shown in Figure 6, its mathematical model is as follows for load growth S type curve model:
Wherein: Y is the annual peak load of t, i.e. the system peak load of peak day or typical load day; T is the year number in distance present situation year; L is saturation loading; A is S type curve growth parameter.
Recent and the succeeding year load level of step S201, foundation prediction, determines the power transformation capacity needed for nearly 5 years and transformer station's seat number;
The power transformation capacity needed for nearly 5 years that step S202, foundation are determined and transformer station's seat number, determine that recent high voltage substation is layouted and rack.
In actual applications, first according to newly-built region distant view load level, determine that distant view high voltage substation is layouted and rack, then according to S type load curve forecasting in the recent period and succeeding year load, determine that recent high voltage substation is layouted and rack, and accomplish to combine with distant view in the recent period.
With reference to figure 3, show the process flow diagram of a kind of distribution network planning embodiment of the method 3 of the application, particularly, can be performed in step S100, according to newly-built regional prediction load level by following steps, determine that distant view high voltage substation is layouted and rack:
Step S300, according to newly-built regional prediction load level.Utilize and preset directive/guide capacity-load ratio limit value, determine the power transformation capacity needed for described newly-built region;
In the application, the power transformation capacity that following formula is determined needed for described newly-built region can be utilized:
S
the upper limit=P
balance/ λ
lower limit
S
lower limit=P
balance/ λ
the upper limit
Wherein, S
the upper limit110kV power transformation maximum size needed for newly-built region; S
lower limit110kV power transformation lower bound of capacity needed for newly-built region; P
balancefor 110kV balanced load, P
balance=estimation range total load-110kV and above special varying load-220kV direct-furnish 35kV load-35kV and following power plant load; λ
the upper limit, λ
lower limitfor the capacity-load ratio upper and lower limit that directive/guide requires.
Step S301, utilize described power transformation capacity, determine transformer station's seat number;
In a regional Study on Power Grid Planning directive/guide, regulation is had for 110kV transformer capacity and final scale, give an example, Jiande City's electrical network 110kV transformer capacity is generally 50MVA (B, C Lei Gong district) and 40MVA (D Lei Gong district), and final scale is generally 3.When above region power transformation capacity is determined, transformer station's seat number can be calculated.
For B, C class service area, transformer capacity elects 50MVA as, and computing formula is as follows:
N
the upper limit=S
the upper limit/ (3*50); N
lower limit=S
lower limit/ (3*50)
For D class service area, transformer capacity elects 40MVA as, and computing formula is as follows:
N
the upper limit=S
the upper limit/ (3*40); N
lower limit=S
lower limit/ (3*40).
Step S302, reference actual power demand and power supply technique, carry out siting analysis to transformer station, determine site and the arrangement form of transformer station;
Particularly, planning carries out detailed siting analysis to Wei Jian transformer station, the land used ownership that inquiry is relevant, the construction situation in substation site selection plot, topographic features are analyzed and examine on the spot, coordination periphery is planned, and consider from power supply technique angle the feasibility that transformer station implements, ensure the operational feasibility of planning transformer station land used.To the transformer station that temporarily cannot implement land used, planning proposition arranges requirement, implements land used in this section when sheet section planning or transformation.
Step S303, High-Voltage Network shelf structure principle with reference to high one-level substation location and each power supply enterprise, determine rack construction scheme.
Regulation in state's net " directive/guide ", B, C Lei Gong district high voltage distribution network should adopt chain type or biradial wiring, and D Lei Gong district high voltage distribution network should adopt biradial wiring.High voltage overhead lines corridor takies a large amount of urban land, on urban look and Land_use change exploitation impact comparatively large, but overhead transmission line is compared cable line and is had transmission capacity large, and maintenance is convenient, the advantages such as cost of investment is low, its important component part as electrical network is by long-term existence.Planning should coordinate the demand of electric system and urban development, reduces electric power overhead corridor to the impact in city.
With reference to figure 4, show the process flow diagram of a kind of distribution network planning embodiment of the method 4 of the application, particularly, can by following steps realize step S101, centering pressure feeder line theoretical reliability estimate, determine that middle pressure integrity problem concentrates transformer station:
Feeder reliability decision rule is preset in step S400, reference, determines the feeder line of poor reliability in transformer station;
Step S401, judge whether the ratio that the feeder line number of all poor reliability accounts for total outlet number is greater than predetermined threshold value, if so, then enters step S402, otherwise, enter step S403;
Step S402, determine that described transformer station is that middle pressure integrity problem concentrates transformer station;
Step S403, determine that described transformer station is the normal transformer station of reliability, namely non-middle pressure integrity problem concentrates transformer station.
In practical application, predetermined threshold value can be set as 1/3, when the ratio that the feeder line number of poor reliability accounts for total outlet number is greater than 1/3, determine that described transformer station is that middle pressure integrity problem concentrates transformer station.
Corresponding with a kind of distribution network planning embodiment of the method 1 of above-mentioned the application, present invention also provides a kind of distribution network planning system embodiment 1, with reference to figure 5, this system 500 can comprise following content:
Substation location and rack determining unit 501, for according to newly-built regional prediction load level, determine that distant view high voltage substation is layouted and rack, in the recent period high voltage substation are layouted and rack, to meet load growth requirement; Wherein, described prediction load level comprises transformer station and feeder load level;
Weak links of reliability determining unit 502, the theoretical reliability for centering pressure feeder line is estimated, determines that middle pressure integrity problem concentrates transformer station, to determine middle pressure weak links of reliability concentrated area;
Security weak link determining unit 503, for for main transformer, transformer station, quantitative test power distribution network power supply safety level, to determine security of distribution network weak link;
Distribution network planning project system cell 504, for to layout according to described newly-built region distant view high voltage substation and rack, in the recent period high voltage substation are layouted and rack, middle pressure integrity problem concentrate transformer station and security of distribution network weak link, formulate distribution network planning project targetedly, to meet power supply reliability demand.
In the application, described substation location and rack determining unit 501 can comprise:
Recent high voltage substation is layouted and rack determination subelement, increases S type curve for reference load, predicts in the recent period and succeeding year load level; According to the recent of prediction and succeeding year load level, determine the power transformation capacity needed for nearly 5 years and transformer station's seat number; Determine that recent high voltage substation is layouted and rack;
Distant view high voltage substation is layouted and rack determination subelement, for according to newly-built regional prediction load level.Utilize and preset directive/guide capacity-load ratio limit value, determine the power transformation capacity needed for described newly-built region; Utilize described power transformation capacity, determine transformer station's seat number; With reference to actual power demand and power supply technique, siting analysis is carried out to transformer station, determines site and the arrangement form of transformer station; With reference to the High-Voltage Network shelf structure principle of high one-level substation location and each power supply enterprise, determine rack construction scheme.
In the application, described distant view high voltage substation is layouted and rack determination subelement comprises:
Computation subunit, the power transformation capacity determining needed for described newly-built region for utilizing following formula:
S
the upper limit=P
balance/ λ
lower limit
S
lower limit=P
balance/ λ
the upper limit
Wherein, S
the upper limit110kV power transformation maximum size needed for newly-built region; S
lower limit110kV power transformation lower bound of capacity needed for newly-built region; P
balancefor 110kV balanced load, P
balance=estimation range total load-110kV and above special varying load-220kV direct-furnish 35kV load-35kV and following power plant load; λ
the upper limit, λ
lower limitfor the capacity-load ratio upper and lower limit that directive/guide requires.
In the application, weak links of reliability determining unit 502 can comprise:
Poor reliability feeder line determination subelement, for reference to presetting feeder reliability decision rule, determines the feeder line of poor reliability in transformer station;
Weak links of reliability determination subelement, for when the ratio that the feeder line number of poor reliability accounts for total outlet number is greater than predetermined threshold value, determines that described transformer station is that middle pressure integrity problem concentrates transformer station.
It should be noted that, each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, between each embodiment identical similar part mutually see.For system class embodiment, due to itself and embodiment of the method basic simlarity, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.
Above the distribution network planning method and system that the application provides are described in detail.Apply specific case herein to set forth the principle of the application and embodiment, the explanation of above embodiment is just for helping method and the core concept thereof of understanding the application.It should be pointed out that for those skilled in the art, under the prerequisite not departing from the application's principle, can also carry out some improvement and modification to the application, these improve and modify and also fall in the protection domain of the application's claim.
Claims (10)
1. a distribution network planning method, is characterized in that, comprising:
According to newly-built regional prediction load level, determine that distant view high voltage substation is layouted and rack, in the recent period high voltage substation are layouted and rack, to meet load growth requirement; Wherein, described prediction load level comprises transformer station and feeder load level;
The theoretical reliability of centering pressure feeder line is estimated, determines that middle pressure integrity problem concentrates transformer station, to determine middle pressure weak links of reliability concentrated area;
For main transformer, transformer station, quantitative test power distribution network power supply safety level, to determine security of distribution network weak link;
To layout according to described newly-built region distant view high voltage substation and rack, in the recent period high voltage substation are layouted and rack, middle pressure integrity problem concentrate transformer station and security of distribution network weak link, formulate distribution network planning project targetedly, to reach default reliability objectives and to meet power supply reliability demand.
2. the method for claim 1, is characterized in that, according to newly-built regional prediction load level, determines that recent high voltage substation is layouted and rack, comprising:
Reference load increases S type curve, predicts in the recent period and succeeding year load level;
According to the recent of prediction and succeeding year load level, determine the power transformation capacity needed for nearly 5 years and transformer station's seat number;
Determine that recent high voltage substation is layouted and rack.
3. the method for claim 1, is characterized in that, according to newly-built regional prediction load level, determines that distant view high voltage substation is layouted and rack, comprising:
According to newly-built regional prediction load level.Utilize and preset directive/guide capacity-load ratio limit value, determine the power transformation capacity needed for described newly-built region;
Utilize described power transformation capacity, determine transformer station's seat number;
With reference to actual power demand and power supply technique, siting analysis is carried out to transformer station, determines site and the arrangement form of transformer station;
With reference to the High-Voltage Network shelf structure principle of high one-level substation location and each power supply enterprise, determine rack construction scheme.
4. method as claimed in claim 3, is characterized in that, utilizes the power transformation capacity that following formula is determined needed for described newly-built region:
S
the upper limit=P
balance/ λ
lower limit
S
lower limit=P
balance/ λ
the upper limit
Wherein, S
the upper limit110kV power transformation maximum size needed for newly-built region; S
lower limit110kV power transformation lower bound of capacity needed for newly-built region; P
balancefor 110kV balanced load, P
balance=estimation range total load-110kV and above special varying load-220kV direct-furnish 35kV load-35kV and following power plant load; λ
the upper limit, λ
lower limitfor the capacity-load ratio upper and lower limit that directive/guide requires.
5. the method for claim 1, is characterized in that, the theoretical reliability of centering pressure feeder line is estimated, determines that middle pressure integrity problem concentrates transformer station, comprising:
With reference to presetting feeder reliability decision rule, determine the feeder line of poor reliability in transformer station;
When the ratio that the feeder line number of poor reliability accounts for total outlet number is greater than predetermined threshold value, determine that described transformer station is that middle pressure integrity problem concentrates transformer station.
6. the method for claim 1, is characterized in that, formulates targetedly after distribution network planning project, also comprises:
For returns of investment, qualitative assessment is carried out to described distribution network planning project, to determine whether described distribution planning project can reach default economy objectives.
7. a distribution network planning system, is characterized in that, comprising:
Substation location and rack determining unit, for according to newly-built regional prediction load level, determine that distant view high voltage substation is layouted and rack, in the recent period high voltage substation are layouted and rack, to meet load growth requirement; Wherein, described prediction load level comprises transformer station and feeder load level;
Weak links of reliability determining unit, the theoretical reliability for centering pressure feeder line is estimated, determines that middle pressure integrity problem concentrates transformer station, to determine middle pressure weak links of reliability concentrated area;
Security weak link determining unit, for for main transformer, transformer station, quantitative test power distribution network power supply safety level, to determine security of distribution network weak link;
Distribution network planning project system cell, for to layout according to described newly-built region distant view high voltage substation and rack, in the recent period high voltage substation are layouted and rack, middle pressure integrity problem concentrate transformer station and security of distribution network weak link, formulate distribution network planning project targetedly, to reach default reliability objectives and to meet power supply reliability demand.
8. system as claimed in claim 7, it is characterized in that, described substation location and rack determining unit comprise:
Recent high voltage substation is layouted and rack determination subelement, increases S type curve for reference load, predicts in the recent period and succeeding year load level; According to the recent of prediction and succeeding year load level, determine the power transformation capacity needed for nearly 5 years and transformer station's seat number; Determine that recent high voltage substation is layouted and rack;
Distant view high voltage substation is layouted and rack determination subelement, for according to newly-built regional prediction load level.Utilize and preset directive/guide capacity-load ratio limit value, determine the power transformation capacity needed for described newly-built region; Utilize described power transformation capacity, determine transformer station's seat number; With reference to actual power demand and power supply technique, siting analysis is carried out to transformer station, determines site and the arrangement form of transformer station; With reference to the High-Voltage Network shelf structure principle of high one-level substation location and each power supply enterprise, determine rack construction scheme.
9. system as claimed in claim 8, it is characterized in that, described distant view high voltage substation is layouted and rack determination subelement comprises:
Computation subunit, the power transformation capacity determining needed for described newly-built region for utilizing following formula:
S
the upper limit=P
balance/ λ
lower limit
S
lower limit=P
balance/ λ
the upper limit
Wherein, S
the upper limit110kV power transformation maximum size needed for newly-built region; S
lower limit110kV power transformation lower bound of capacity needed for newly-built region; P
balancefor 110kV balanced load, P
balance=estimation range total load-110kV and above special varying load-220kV direct-furnish 35kV load-35kV and following power plant load; λ
the upper limit, λ
lower limitfor the capacity-load ratio upper and lower limit that directive/guide requires.
10. system as claimed in claim 9, it is characterized in that, weak links of reliability determining unit comprises:
Poor reliability feeder line determination subelement, for reference to presetting feeder reliability decision rule, determines the feeder line of poor reliability in transformer station;
Weak links of reliability determination subelement, for when the ratio that the feeder line number of poor reliability accounts for total outlet number is greater than predetermined threshold value, determines that described transformer station is that middle pressure integrity problem concentrates transformer station.
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| CN201510144904.6A CN104680340A (en) | 2015-03-30 | 2015-03-30 | Distribution network planning method and system |
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| CN201510144904.6A CN104680340A (en) | 2015-03-30 | 2015-03-30 | Distribution network planning method and system |
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| CN (1) | CN104680340A (en) |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036230A (en) * | 2016-02-04 | 2017-08-11 | Lg电子株式会社 | The method of air-conditioning and control air-conditioning |
| CN106651129A (en) * | 2016-11-16 | 2017-05-10 | 合肥普望电子有限责任公司 | City power grid operation planning method |
| CN108089080A (en) * | 2017-12-13 | 2018-05-29 | 杭州凯达电力建设有限公司 | A kind of distribution network planning monitoring system |
| CN108089080B (en) * | 2017-12-13 | 2020-03-31 | 杭州凯达电力建设有限公司 | Power distribution network planning monitoring system |
| CN110147961A (en) * | 2019-05-23 | 2019-08-20 | 华南理工大学 | The distribution network reliability analysis method of user's difference is considered under the conditions of power distribution automation |
| CN110147961B (en) * | 2019-05-23 | 2022-10-25 | 华南理工大学 | Power distribution network reliability analysis method considering user difference under power distribution automation condition |
| CN110991740A (en) * | 2019-12-03 | 2020-04-10 | 海南电网有限责任公司 | Power grid planning method and system based on operation simulation and intelligent agent technology |
| CN110991740B (en) * | 2019-12-03 | 2023-12-15 | 海南电网有限责任公司 | Power grid planning method and system based on operation simulation and intelligent agent technology |
| CN112350334A (en) * | 2020-11-13 | 2021-02-09 | 深圳供电局有限公司 | Power supply method of comprehensive parking lot charging facility |
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