CN109190905A - Comprehensive source-net-lotus-storage distribution system photoelastic evaluation system and method - Google Patents
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Abstract
The present invention provides a kind of comprehensive source-net-lotus-storage distribution system photoelastic evaluation system and methods, comprising: power supply photoelastic evaluation module, loading elasticity evaluation module, distribution network photoelastic evaluation module, store elastic evaluation module, comprehensive photoelastic evaluation module and elastic sensitivity analysis module；Power supply photoelastic evaluation module, loading elasticity evaluation module, distribution network photoelastic evaluation module and store elastic evaluation module carry out photoelastic evaluation to link corresponding in distribution system respectively；The photoelastic evaluation of comprehensive photoelastic evaluation module synthesis links carries out photoelastic evaluation to entire distribution system；Elastic sensitivity analysis module is analyzed for the key factor for influencing elasticity in distribution system.The present invention can accurately evaluate distribution system, the elasticity including source, net, lotus, the elasticity for storing up links and whole system, and grasp distribution system reply uncertain factor influences or is the ability that unpredictable external force is destroyed.
Description
Technical field
The present invention relates to electric system assessment technique fields, and in particular, to comprehensive source-net-lotus-storage distribution system bullet
Property evaluation system and method.
Background technique
In modern and following power distribution network, a large amount of generation of electricity by new energy form accesses extensively, and electric car etc. is new
A large amount of appearance of type load, so that the uncertain factor that power distribution network is faced is more complicated, this just needs distribution system to have
Stronger elasticity ensures the safe and reliable and economical operation of distribution system to cope with the influence and impact of these uncertain factors,
And new energy is received as far as possible.In addition, medium voltage distribution network may also be subjected to the destruction and influence of natural calamity, such as cruelly
Rain, typhoon, thunder and lightning and ice damage etc. also require power distribution system from the angle for ensureing that load, particularly important load are powered
System has certain elasticity.
Distribution system includes the different link such as power supply, power grid, load and energy storage.Power supply therein is mainly new energy,
The power supply of the forms such as wind-powered electricity generation, photovoltaic power generation.Therefore, distribution system and power distribution network have certain difference, including power distribution network.
Traditional evaluation method and index for intermediate distribution system mainly include safety (N-1), reliability
Several aspects such as (SAIDI, SAIFI etc.) and economy (network loss, cost of investment), respectively from different sides to medium-voltage distribution
System is evaluated.And it is less for the research of the photoelastic evaluation of intermediate distribution system, relative to traditional intermediate distribution system
Evaluation index and method, photoelastic evaluation are the evaluation index and method of a kind of synthesis.The concept of elastic (resilience) is earliest
Originating from field of ecology, it is widely used in the ability that evaluation system bears fast quick-recovery after external disturbance and disturbance later.
Flexible power refers to that the responding ability of objective uncertain factor variation is coped in electric system.Currently, being studied for flexible power
Most is loading elasticity.According to the objective uncertain factor of difference for influencing load variations, loading elasticity can be there are many class
Type, what domestic and international research range was most wide at present is price elasticity.The price elasticity of load is primarily referred to as depositing between load and electricity price
In resilient relationship, takes the form of load and change with the variation of price.Other than the price elasticity of load, duration of load application
Elasticity concept it is also critically important (" coordinated control of the Operation of Electric Systems reliability in electricity market based on Price elasticity ", in
State's electrical engineering journal, 2005,25 (24): 34-40；" tou power price under across period demand-price elasticity ", relay,
2006,34 (21): 68).The time elasticity of load refers to resilient relationship existing for load and time, but does not imply that load at any time
Between Variation Features, but emphasize the transferability of load at any time, i.e., load is transferred to another time from a period
A possibility that section.But the price elasticity of load and time elasticity are complementary.The time elasticity of load often through
What price guidance or the mode of economic compensation were realized, and embodied by way of price elasticity.Common practice
It is to formulate different electricity prices for different periods, load will be caused to shift, is i.e. the time elasticity of realization load.Therefore, exist
Demand-price elasticity and time elasticity on the basis of this are consistent.
It is then relatively fewer for the otherwise elasticity research in addition to loading elasticity at present.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide comprehensive source-net-lotus-storage distribution system elasticity
Evaluation system and method.
A kind of comprehensive source-net-lotus-storage distribution system photoelastic evaluation system provided according to the present invention, comprising: power supply bullet
Property evaluation module, loading elasticity evaluation module, distribution network photoelastic evaluation module, store elastic evaluation module, comprehensive elasticity comment
Valence module and elastic sensitivity analysis module；
The power supply photoelastic evaluation module, the loading elasticity evaluation module, the distribution network photoelastic evaluation module with
And the store elastic evaluation module carries out photoelastic evaluation to link corresponding in distribution system respectively；
The photoelastic evaluation of the comprehensive photoelastic evaluation module synthesis links carries out elasticity to entire distribution system and comments
Valence；
The elastic sensitivity analysis module is analyzed for the key factor for influencing elasticity in distribution system.
Preferably, the power supply photoelastic evaluation module includes:
The active power of single new energy or renewable energy power generation unit is divided into controllable part and uncontrollable part, it can
Elasticity of the active power of part as new energy or renewable energy power generation unit is controlled, by new energy or development of renewable energy
The elasticity of motor group cluster makes the elasticity superposition of each new energy or renewable energy power generation unit, establishes as power supply elasticity
The elastic curve of power supply.
Preferably, the loading elasticity evaluation module includes:
The active power for representing load is divided into controllable part and uncontrollable part, by the load active power of controllable part
As loading elasticity, the elastic curve of load is established.
Preferably, the distribution network photoelastic evaluation module includes:
Primary system photoelastic evaluation and electrical secondary system photoelastic evaluation are commented for the load transfer ability of distribution network
Valence, by-line analyze the elasticity of distribution system, can turn the load active power of confession as the index of evaluation distribution system elasticity.
Preferably, the method that the primary system photoelastic evaluation takes substance failure to enumerate, that is, assume all possible list
Weight failure mode, scene and severity, are divided for the load transfer ability of the distribution line of different Connection Modes
Analysis, as photoelastic evaluation index；
The electrical secondary system photoelastic evaluation considers influence of the automation equipment to primary system load transfer ability to carry out
Photoelastic evaluation, be, i.e. raising or reduction primary system load turn reflected by the influence to primary system elasticity
For the degree of ability.
Preferably, the store elastic evaluation module includes:
The elasticity of energy-storage system is evaluated, the elasticity of energy-storage system is exactly available capacity；
Energy-storage system active power is established with the change curve of control variable.
Preferably, the comprehensive photoelastic evaluation module includes: distribution system subregion submodule, zoned elastification assessment submodule
Block, series-parallel equivalent submodule and comprehensive assessment submodule；
Distribution system is divided into different power supplies according to the connection relationship of distribution network by the distribution system subregion submodule
Region is attached between each power supply area simply by higher level substation or route, independent between each other；
Zoned elastification evaluation submodule by different subregions include source-net-lotus-storage links elasticity into
Row overall merit obtains the synthesis photoelastic evaluation index of each subregion；
The series-parallel equivalent submodule is that each subregion is carried out to series-parallel equivalence, and equivalence is at an overall power distribution system
Model；
The overall merit submodule refers to according to the synthesis photoelastic evaluation of overall power distribution system model and each subregion
Mark, the elastic index of COMPREHENSIVE CALCULATING distribution system, the elasticity for subregion of connecting are the accumulation of different each zoned elastifications, subregion in parallel
Elasticity be the tired of different each zoned elastifications and.
Preferably, the elastic sensitivity analysis module includes:
According to the elasticity of power supply, load and energy-storage system, and influence the factor of distribution network elasticity, analyzing influence distribution
The factor of network resilience finds the weak link and factor of distribution system elasticity to the influence degree of comprehensive elastic index.
A kind of comprehensive source-net-lotus-storage distribution system photoelastic evaluation method provided according to the present invention, comprising: power supply bullet
Property evaluation procedure, loading elasticity evaluation procedure, distribution network photoelastic evaluation step, store elastic evaluation procedure, comprehensive elasticity comment
Valence step and elastic sensitivity analytical procedure；
The power supply photoelastic evaluation step, the loading elasticity evaluation procedure, the distribution network photoelastic evaluation step with
And the store elastic evaluation procedure carries out photoelastic evaluation to link corresponding in distribution system respectively；
The photoelastic evaluation of the comprehensive links of comprehensive photoelastic evaluation step, carries out elasticity to entire distribution system and comments
Valence；
The elastic sensitivity analytical procedure is analyzed for the key factor for influencing elasticity in distribution system.
Preferably, the elastic sensitivity analytical procedure includes:
According to the elasticity of power supply, load and energy-storage system, and influence the factor of distribution network elasticity, analyzing influence distribution
The factor of network resilience finds the weak link and factor of distribution system elasticity to the influence degree of comprehensive elastic index.
Compared with prior art, the present invention have it is following the utility model has the advantages that
The present invention, can be to distribution system, packet to the synthesis of conventional electrical distribution system safety, reliability and Economic Evaluation
The elasticity for including source, net, lotus, the elasticity for storing up links and whole system is accurately evaluated, and distribution system reply is grasped
Uncertain factor influences or is the ability that unpredictable external force is destroyed.To mention to ensure power distribution system secure reliability service
The economy of high distribution system operation and the receiving ability of new energy.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is calculation flow chart of the invention.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
As shown in Figure 1, a kind of comprehensive source-net-lotus-storage distribution system photoelastic evaluation system provided by the invention, comprising:
Data inputting module, power supply photoelastic evaluation module, loading elasticity evaluation module, distribution network photoelastic evaluation module, store elastic
Evaluation module, comprehensive photoelastic evaluation module and elastic sensitivity analysis module.
1. first since data inputting module, be data required for photoelastic evaluation are prepared and are handled, including
Data in terms of power supply, load, distribution network and energy storage.
2. then carrying out the elasticity assessment of power supply, load, distribution network and energy storage link simultaneously.Power supply photoelastic evaluation module
It is evaluated primarily directed to the elasticity of new and renewable energy, by single new energy or renewable energy power generation machine
The power output (active power) of group is divided into two parts, i.e. controllable part and uncontrollable part.The wherein active power of uncontrollable part
It is mainly influenced by uncertain factor, and the active power of controllable part is as new energy or renewable energy power generation unit
Elasticity；And using the elasticity of new energy or renewable energy power generation unit cluster as power supply elasticity, it is each generating set bullet
The superposition of property.Meanwhile establishing the elastic curve of power supply, that is, power supply active power is described with the curve of control variable change；
Loading elasticity evaluation module, and the active power for representing load is divided into two parts, i.e. controllable part and can not
Part is controlled, using the load active power of controllable part as loading elasticity.Meanwhile establishing the elastic curve of load, that is, establishing can
Control the active power of load and the relation curve of electricity price or other control variables；
Distribution network photoelastic evaluation module includes two submodules of primary system photoelastic evaluation and electrical secondary system photoelastic evaluation,
It is evaluated for the load transfer ability of MV distribution systems.Because the route of medium voltage distribution network is relatively independent, by-line
The elasticity for analyzing MV distribution systems, the load active power of confession can be turned as the index of evaluation MV distribution systems elasticity；
Wherein, primary system photoelastic evaluation submodule, the method for taking substance failure to enumerate assume all possible substance failure shape
Formula, scene and severity are analyzed for the load transfer ability of the medium-voltage distribution circuit of different Connection Modes, are made
For photoelastic evaluation index；Electrical secondary system photoelastic evaluation submodule considers the automation equipments pair such as electrical power distribution automatization system, prepared auto restart
The influence of primary system load transfer ability is to carry out photoelastic evaluation.That is, the photoelastic evaluation of electrical secondary system is to pass through
Influence to primary system elasticity is reflected, that is, improves or reduce the degree of primary system load transfer ability；
Store elastic evaluation module is evaluated the elasticity of energy storage device and system.Because of the function of energy-storage system
Rate be all it is controllable, the elasticity of energy-storage system is exactly available capacity.Meanwhile energy-storage system active power is established with control variable
Change curve.
3. comprehensive photoelastic evaluation module, including distribution system subregion submodule, zoned elastification assessment submodule, series-parallel etc.
It is worth submodule and comprehensive assessment submodule；
Distribution system is divided into different power supplies according to the connection relationship of MV distribution systems by distribution system subregion submodule
Region is attached between each power supply area simply by higher level substation or route, independent between each other；
Zoned elastification evaluates submodule for the comprehensive including source-net-lotus-storage links elasticity progress of different subregions
Evaluation is closed, the synthesis photoelastic evaluation index of each subregion is obtained；
Series-parallel equivalence submodule is that each subregion is carried out to series-parallel equivalence, and equivalence is at a comprehensive distribution system mould
Type；
Overall merit submodule, it is comprehensive according to the Equivalent Model of overall power distribution system and the elastic index of each subregion
Calculate the elastic index of distribution system.The elasticity of series connection subregion is the accumulation of different each zoned elastifications, the elasticity of subregion in parallel
Be the tired of different each zoned elastifications and.
4. elastic sensitivity analysis module is analyzed for the key factor for influencing elasticity in distribution system, according to electricity
The elastic curve (relation curve i.e. between elasticity and control variable) in source, load and energy storage link, and influence distribution network
The factors such as fault type, scene, the electrical secondary system device type of elasticity analyze its influence journey to comprehensive elastic index
Degree is found the weak link and factor of intermediate distribution system elasticity, is mentioned as the elasticity for improving intermediate distribution system
For decision-making foundation.
On the basis of a kind of above-mentioned comprehensive source-net-lotus-storage distribution system photoelastic evaluation system, the present invention also provides
A kind of comprehensive source-net-lotus-storage distribution system photoelastic evaluation method, comprising: power supply photoelastic evaluation step, loading elasticity evaluation
Step, distribution network photoelastic evaluation step, store elastic evaluation procedure, comprehensive photoelastic evaluation step and elastic sensitivity analysis
Step；
The power supply photoelastic evaluation step, the loading elasticity evaluation procedure, the distribution network photoelastic evaluation step with
And the store elastic evaluation procedure carries out photoelastic evaluation to link corresponding in distribution system respectively；
The photoelastic evaluation of the comprehensive links of comprehensive photoelastic evaluation step, carries out elasticity to entire distribution system and comments
Valence；
The elastic sensitivity analytical procedure is analyzed for the key factor for influencing elasticity in distribution system.
One skilled in the art will appreciate that in addition to realizing system provided by the invention in a manner of pure computer readable program code
It, completely can be by the way that method and step be carried out programming in logic come so that the present invention provides and its other than each device, module, unit
System and its each device, module, unit with logic gate, switch, specific integrated circuit, programmable logic controller (PLC) and embedding
Enter the form of the controller that declines etc. to realize identical function.So system provided by the invention and its every device, module, list
Member is considered a kind of hardware component, and to include in it can also for realizing the device of various functions, module, unit
To be considered as the structure in hardware component；It can also will be considered as realizing the device of various functions, module, unit either real
The software module of existing method can be the structure in hardware component again.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
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| CN112257990A (en) * | 2020-09-30 | 2021-01-22 | 深圳供电局有限公司 | Power distribution network elasticity evaluation method and device, computer equipment and storage medium |
| CN114091891A (en) * | 2021-11-18 | 2022-02-25 | 广东电网有限责任公司 | Elastic network algorithm-based prearranged repeated power failure analysis method and system |
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| CN114357671A (en) * | 2021-11-26 | 2022-04-15 | 国网山东省电力公司日照供电公司 | Method and system of distribution network elasticity improvement planning and configuration based on weak link identification |
| CN114254471B (en) * | 2022-03-02 | 2022-06-28 | 成都数联云算科技有限公司 | Element identification method, device, equipment and storage medium of power network |
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| CN105743088B (en) * | 2016-04-07 | 2017-11-21 | 国网江苏省电力公司电力科学研究院 | A kind of horizontal uncertain influence elastic network(s) regression analysis of distribution network voltage |
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| CN107171361A (en) * | 2017-06-13 | 2017-09-15 | 中国能源建设集团江苏省电力设计院有限公司 | Intelligent distribution station and network source-load-storage coordinated control system based on network-source-load-storage coordinated control |
| CN107832919A (en) * | 2017-10-17 | 2018-03-23 | 国网江苏省电力公司盐城供电公司 | A kind of source net lotus coordinated control system for intermittent renewable energy access power network |
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| CN112257990A (en) * | 2020-09-30 | 2021-01-22 | 深圳供电局有限公司 | Power distribution network elasticity evaluation method and device, computer equipment and storage medium |
| CN112257990B (en) * | 2020-09-30 | 2024-04-26 | 深圳供电局有限公司 | Elasticity evaluation method and device for power distribution network, computer equipment and storage medium |
| CN114091891A (en) * | 2021-11-18 | 2022-02-25 | 广东电网有限责任公司 | Elastic network algorithm-based prearranged repeated power failure analysis method and system |
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