CN107688880A - Evaluation Method of Distribution Systems Reliability and device - Google Patents
Evaluation Method of Distribution Systems Reliability and device Download PDFInfo
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- CN107688880A CN107688880A CN201610628606.9A CN201610628606A CN107688880A CN 107688880 A CN107688880 A CN 107688880A CN 201610628606 A CN201610628606 A CN 201610628606A CN 107688880 A CN107688880 A CN 107688880A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
Abstract
The invention discloses a kind of Evaluation Method of Distribution Systems Reliability and device.Methods described includes：Using the switching device in distribution system as boundary element, using breadth traversal algorithm, by the element divisions in distribution system into multiple element piecemeal；According to the distance with main power source in distribution system, according to rule from the near to the remote, hierarchical setting is carried out to switching device, and element piecemeal is concluded into the level of high-level switching device adjacent thereto；It is assumed that some element piecemeal breaks down, and a high-level switching device to be shielded to fault element piecemeal is disconnected successively；According to the annexation of main power source or stand-by power supply in the load and power distribution network being connected with element piecemeal, carry out influence of the failure judgement element piecemeal to each load reliability；Influence of all element piecemeal failures to each load reliability is counted, calculates the reliability index of distribution system.The method of the present invention can avoid repeating to travel through matching somebody with somebody each element, so as to improve the efficiency of calculating.
Description
Technical field
The present invention relates to evaluating reliability of distribution network technical field, more particularly to a kind of Evaluation Method of Distribution Systems Reliability
And device.
Background technology
Power System Reliability is that Power System Planning works with conventional line necessary to operation.Distribution system is as connection
Generating and transmitting system and the tie of user, ability of the power system to the continuous power supply of user is reflected, its reliability embodies a concentrated reflection of
Whole NETWORK STRUCTURE PRESERVING POWER SYSTEM and operation characteristic.
The existing method to reliability evaluation is broadly divided into two classes：Analytic method and Monte Carlo Analogue Method, by
It is directly proportional to calculating the time in the computational accuracy of Monte Carlo Analogue Method, during in order to meet simulation that high-precision requirement needs are grown very much
Between, therefore, the main reliability that distribution system is assessed using analytic method, i.e., established by enumerating all element faults in engineering
Failure effect pattern table, calculate the reliability index of distribution system.But because actual distribution system is in large scale, Fault enumeration
Quantity is more so that reliability evaluation difficulty is big, efficiency is low.
The content of the invention
In order to solve the problems, such as that analytic method is difficult to the reliability assessment suitable for complicated distribution, the embodiment of the present invention carries
A kind of Evaluation Method of Distribution Systems Reliability and device are supplied.The technical scheme is as follows：
On the one hand, the embodiments of the invention provide a kind of Evaluation Method of Distribution Systems Reliability, methods described to include：
Using the switching device in distribution system as boundary element, using breadth traversal algorithm, by the element in distribution system
Multiple element piecemeal is divided into, the switching device includes：It is at least one in breaker, disconnecting switch, interconnection switch, it is described
Element includes：Circuit or transformer；
According to the distance with main power source in distribution system, according to rule from the near to the remote, the switching device is divided
Level is set, and the element piecemeal is concluded into the level of high-level switching device adjacent thereto；
It is assumed that some element piecemeal breaks down, and a high level to be shielded to fault element piecemeal is disconnected successively
Level switching device；
According to the annexation of main power source or stand-by power supply in the load and power distribution network being connected with element piecemeal, to judge event
Hinder influence of the element piecemeal to each load reliability；
Influence of all element piecemeal failures to each load reliability is counted, the reliability for calculating distribution system refers to
Mark, the reliability index of the distribution system include：System averagely powers off the average interruption duration of frequency, system, Yong Huping
At least one of the average electricity consumption availability of equal interruption duration, system, the average electricity consumption degree of unavailability of system.
In the above-mentioned Evaluation Method of Distribution Systems Reliability of the embodiment of the present invention, the basis is connected with element piecemeal
Load and the annexation of main power source or stand-by power supply in power distribution network, carry out failure judgement element piecemeal to each load reliability
Influence, including：
When disconnecting a breaker, judge whether load is connected with main power source, if being connected, judge that the load is born for A types
Lotus, the fault time that the A types load is influenceed by fault element piecemeal are 0, and probability of malfunction is also 0；
Disconnect one and judge whether load is connected with main power source or stand-by power supply when inner switch, if being connected with main power source,
The load is then judged for Type B load, and the fault time that the Type B load is influenceed by fault element piecemeal operates for disconnecting switch
Time, probability of malfunction are the probability of failure of disconnecting switch；If being connected with stand-by power supply and not being connected with main power source, the load is judged
For c-type load, the fault time that the c-type load is influenceed by fault element piecemeal opens for the operating time of disconnecting switch with contact
Operating time sum is closed, probability of malfunction is the fault rate of disconnecting switch；
When disconnecting a breaker or every inner switch, if load is neither connected with main power source, and do not connect with stand-by power supply
Connect, then judge the load for D type loads, the fault time that the D types load is influenceed by fault element piecemeal is the fault element
The average failure duration of piecemeal, probability of malfunction are the fault rate of element piecemeal.
In the above-mentioned Evaluation Method of Distribution Systems Reliability of the embodiment of the present invention, the mean failure rate of the element piecemeal is held
Continuous time and fault rate are calculated by equation below：
Wherein, λi、riElement i fault rate and average failure duration in respectively element piecemeal s；λs、rsRespectively
Element piecemeal s fault rate and trouble duration；N represents element total number in the element piecemeal s.
In the above-mentioned Evaluation Method of Distribution Systems Reliability of the embodiment of the present invention, the element also includes fuse.
In the above-mentioned Evaluation Method of Distribution Systems Reliability of the embodiment of the present invention, the mean failure rate of the element piecemeal is held
Continuous time and fault rate are calculated by equation below：
Wherein, λj、rjWhen element j fault rate and mean failure rate continue in the respectively element piecemeal s1 comprising fuse
Between；λs1、rs1The respectively fault rate and trouble duration of the element piecemeal s1 comprising fuse；M is represented in element piecemeal s1
Element total number.
On the other hand, the embodiments of the invention provide a kind of reliability evaluation device, described device to include：
Split module, for using the switching device in distribution system as boundary element, using breadth traversal algorithm, by distribution
Element divisions in system include into multiple element piecemeal, the switching device：In breaker, disconnecting switch, interconnection switch
At least one, the element includes：Circuit or transformer；
Setup module, for according to the distance with main power source in distribution system, according to rule from the near to the remote, opening described
Close device and carry out hierarchical setting, and the element piecemeal is concluded into the level of high-level switching device adjacent thereto；
Processing module, for assuming that some element piecemeal breaks down, and one is disconnected successively fault element piecemeal is risen
The high-level switching device of protective effect；
Judge module, for the connection according to main power source or stand-by power supply in the load and power distribution network being connected with element piecemeal
Relation, carry out influence of the failure judgement element piecemeal to each load reliability；
Computing module, for counting influence of all element piecemeal failures to each load reliability, calculate power distribution system
The reliability index of system, the reliability index of the distribution system include：It is average power-off continuous that system averagely powers off frequency, system
At least one of time, the average interruption duration of user, the average electricity consumption availability of system, the average electricity consumption degree of unavailability of system.
In the above-mentioned reliability evaluation device of the embodiment of the present invention, the judge module, it is additionally operable to disconnect
During one breaker, judge whether load is connected with main power source, if being connected, judge the load for A type loads, the A types are born
The fault time that lotus is influenceed by fault element piecemeal is 0, and probability of malfunction is also 0；
The judge module, be additionally operable to disconnect one when inner switch, judge load whether with main power source or stand-by power supply
Connection, if being connected with main power source, judges the load for Type B load, the failure that the Type B load is influenceed by fault element piecemeal
Time is the operating time of disconnecting switch, and probability of malfunction is the probability of failure of disconnecting switch；If be connected with stand-by power supply and not with
Main power source is connected, and judges the load for c-type load, and the fault time that the c-type load is influenceed by fault element piecemeal is isolation
The operating time of switch and interconnection switch operating time sum, probability of malfunction are the fault rate of disconnecting switch；
The judge module, it is additionally operable to when disconnecting a breaker or every inner switch, if load neither connects with main power source
Connect, and be not connected with stand-by power supply, then judge the load for D type loads, the event that the D types load is influenceed by fault element piecemeal
Downtime is the average failure duration of the fault element piecemeal, and probability of malfunction is the fault rate of element piecemeal.
In the above-mentioned reliability evaluation device of the embodiment of the present invention, the mean failure rate of the element piecemeal is held
Continuous time and fault rate are calculated by equation below：
Wherein, λi、riElement i fault rate and average failure duration in respectively element piecemeal s；λs、rsRespectively
Element piecemeal s fault rate and trouble duration；N represents element total number in the element piecemeal s.
In the above-mentioned reliability evaluation device of the embodiment of the present invention, the element also includes fuse.
In the above-mentioned reliability evaluation device of the embodiment of the present invention, the mean failure rate of the element piecemeal is held
Continuous time and fault rate are calculated by equation below：
Wherein, λj、rjWhen element j fault rate and mean failure rate continue in the respectively element piecemeal s1 comprising fuse
Between；λs1、rs1The respectively fault rate and trouble duration of the element piecemeal s1 comprising fuse；M is represented in element piecemeal s1
Element total number.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
By using the switching device in distribution system as boundary element, using breadth traversal algorithm, by distribution system
Complicated distribution is converted into simple radial distribution system, then to switching device by element divisions into multiple element piecemeal
Carry out hierarchical setting, and it is assumed that some element piecemeal breaks down, and disconnect one successively fault element piecemeal is risen and protect
In the case of the high-level switching device of shield effect, according to main power source or standby in the load and power distribution network being connected with element piecemeal
The annexation of power supply, carry out influence of the failure judgement element piecemeal to each load reliability, finally count all element piecemeals
Influence of the failure to each load reliability, to calculate the reliability index of distribution system, it can avoid repeating traversal power distribution system
Each element in system, so as to reduce the amount of calculation of distribution Power System Reliability, substantially increase distribution Power System Reliability calculating
Efficiency.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of Evaluation Method of Distribution Systems Reliability flow chart that the embodiment of the present invention one provides；
Fig. 2 is a kind of exemplary plot for distribution system that the embodiment of the present invention one provides；
Fig. 3 is a kind of exemplary plot for distribution system that the embodiment of the present invention one provides；
Fig. 4 is a kind of reliability evaluation structural representation that the embodiment of the present invention two provides.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one
The embodiments of the invention provide a kind of Evaluation Method of Distribution Systems Reliability, and referring to Fig. 1, this method can include：
Step S11, using the switching device in distribution system as boundary element, using breadth traversal algorithm, by distribution system
In element divisions into multiple element piecemeal, wherein, switching device can include：In breaker, disconnecting switch, interconnection switch
At least one, element can include：Circuit (also referred to as feeder line) or transformer.
In the present embodiment, distribution system is divided by boundary condition of switching device, forms multiple element piecemeal,
The repetition traversal to each individual component can be reduced in follow-up calculate, and then reduce calculation procedure, improve computational efficiency.
Step S12, according to the distance with main power source in distribution system, according to rule from the near to the remote, switching device is entered
Row hierarchical is set, and element piecemeal is concluded into the level of high-level switching device adjacent thereto.
In the present embodiment, there are some switching devices that protection act is played to element in distribution system, element piecemeal is being drawn
It timesharing, can be connected with two switching devices, in step s 12 conclude element piecemeal to the of a relatively high switching device of level
In level.
Step S13, it is assumed that some element piecemeal breaks down, and disconnects one successively and protection work is played to fault element piecemeal
High-level switching device.
, it is necessary to disconnect the switching device that protection act is played to fault element piecemeal in this step S13, and it is higher than or waits
In the switching device of the level of fault element piecemeal, furthermore, it is necessary to once disconnect a switching device, that is, a switch dress is disconnected
When putting, other qualified switching means into conduction.
Step S14, according to the annexation of main power source or stand-by power supply in the load and power distribution network being connected with element piecemeal,
Carry out influence of the failure judgement element piecemeal to each load reliability.
In the present embodiment, on the basis of step S13, according to main electricity in the load and power distribution network being connected with element piecemeal
Source or the annexation of stand-by power supply, carry out influence of the failure judgement element piecemeal to each load reliability, can avoid judging
Each influence of the element fault to load reliability, greatly reduces amount of calculation, improves computational efficiency in distribution system.
Specifically, above-mentioned steps S14 can be realized in the following way：
When disconnecting a breaker, judge whether load is connected with main power source, if being connected, judge that the load is born for A types
Lotus, the fault time that the A types load is influenceed by fault element piecemeal are 0, and probability of malfunction is also 0；
Disconnect one and judge whether load is connected with main power source or stand-by power supply when inner switch, if being connected with main power source,
The load is then judged for Type B load, and the fault time that the Type B load is influenceed by fault element piecemeal is when operating of disconnecting switch
Between, probability of malfunction is the probability of failure of disconnecting switch；If being connected with stand-by power supply and not being connected with main power source, judge that the load is
C-type load, the fault time that the c-type load is influenceed by fault element piecemeal grasp for the operating time of disconnecting switch with interconnection switch
Make time sum, probability of malfunction is the fault rate of disconnecting switch；
When disconnecting a breaker or every inner switch, if load is neither connected with main power source, and do not connect with stand-by power supply
Connect, then judge the load for D type loads, the fault time that the D types load is influenceed by fault element piecemeal is the fault element point
The average failure duration of block, probability of malfunction are the fault rate of element piecemeal.
Further, the average failure duration of element piecemeal and fault rate are calculated by equation below：
Wherein, λi、riElement i fault rate and average failure duration in respectively element piecemeal s；λs、rsRespectively
Element piecemeal s fault rate and trouble duration；N represents element total number in the element piecemeal s.
Alternatively, element can also include fuse, i.e., if including fuse in element piecemeal, then need compensation to fuse
Device is to the average failure duration of element piecemeal and the influence of fault rate.
Specifically, the average failure duration and fault rate for including the element piecemeal of fuse pass through equation below meter
Calculate：
Wherein, λj、rjWhen element j fault rate and mean failure rate continue in the respectively element piecemeal s1 comprising fuse
Between；λs1、rs1The respectively fault rate and trouble duration of the element piecemeal s1 comprising fuse；M is represented in element piecemeal s1
Element total number.
Step S15, influence of all element piecemeal failures to each load reliability is counted, calculate distribution system can
By property index, the reliability index of the distribution system can include：System averagely powers off frequency (English abbreviation SAIFI), system
Average interruption duration (English abbreviation SAIDI), the average interruption duration (English abbreviation CAIDI) of user, system are average
Electricity consumption availability (English abbreviation ASAI), the average electricity consumption degree of unavailability (English abbreviation ASUI) of system, system lack delivery (English
At least one of abbreviation ENS).
In the present embodiment, the reliability index of above-mentioned distribution system is mainly related to user that it is mainly by load
Reliability effect, after influence of each element piecemeal failure to load reliability is calculated, pass through count calculate, you can
To the reliability index of distribution system.
With reference to Fig. 2, illustrate, above-mentioned steps S11 to step S14 specific implementation.
First, the division of units piecemeal is entered to distribution system as shown in Figure 2, specifically with breaker B1, B2, is kept apart
S is closed, and interconnection switch N/O is boundary element, forms element piecemeal Block1, Block2, Block3.
Then, the grade of feeder line and element is established, specifically using main feeder grade as 1 division feeder line grade, same grade feedback
On line component level it is identical (such as：L1 and L2), and (leaned on connected upper level feeder line head end according to same grade feeder line number
Nearly main power source side) feeder line is numbered the distance of distance.
Then, using main feeder head end breaker level as 1, distribution system tree is kept, is filled according to being switched after subregion
Put the level that switching device is from the close-by examples to those far off established with main power source distance.In specific calculate, switching device hierarchical classification matrix H is built
Under Liru：
Wherein, first row representation switch type：" 1 " represents breaker, and " 2 " represent disconnecting switch, and " 3 " represent that contact is opened
Close, second is classified as switching branches numbering, and the 3rd is classified as switching device grade, and the 4th is classified as switching device place feeder line numbering, the
Five are classified as switching device level.
Wherein, switching device and element piecemeal can obtain one as a branch road of distribution system
Branch number, when two systems branch road is connected, their annexation is recorded as 1, is otherwise recorded as power distribution system shown in 0, Fig. 2
The branch road connection matrix G of system is represented by：
Secondly, illustrated by taking branch road in Fig. 26 (i.e. element piecemeal 6) failure as an example：
The first step, the grade of branch road 6 are 1, and matrix H middle grade is 1 and the breaker near branch road 6 is branch road 1, now
Branch road connection matrix G1 and reachability matrix P are respectively：
Branch road 1 is joined directly together from main power source in branch road connection matrix G1 to be expert at, now all loads are (i.e. in Fig. 2
Load1、Load2、Load3) there is no path between main power source, i.e., all loads will not be A type loads.
Second step, matrix H middle grade is 1 and the switch near branch road 6 between branch road 1 to 6 is branch road 5, and branch road 1 closes
Close, branch road 5 disconnects；
3rd step, it is 2 that branch road 5, which switchs level, and grade is 1 after fault branch and what switching layer level difference was minimum is branch road
7, directly break branch road 5 and branch road 7 in original leg connection matrix G1.Now reachability matrix P1 is as follows：
From reachability matrix P1, load Load1、Load2There is path between main power source, be B type loads；Load
Load3All there is no path with stand-by power supply and main power source, be D type loads.
Finally, shadow of the failure of element piecemeal 6 to load reliability in distribution system can be judged according to following rule
Ring.Specific rule is as follows：After breaker disconnects, load is connected with main power source, then is A types load (i.e. fault time is 0)；Every inner
After switch isolation failure, if load is connected with main power source be Type B load (i.e. fault time be disconnecting switch operating time),
If being only connected with stand-by power supply and not being connected with main power source, for C type loads, (i.e. fault time is the operating time of disconnecting switch
With interconnection switch operating time sum)；Remaining is D type loads (i.e. fault time is element piecemeal fault correction time).
With reference in the IEEE test system RBTS distribution systems Bus6 shown in Fig. 3 by F4, F5, F6, F7 main feeder group
Into subsystem be sample calculation analysis system, carry out the Calculation of Reliability of the above method.Wherein, circuit breaker Q F1, QF2, QF3, QF4,
Disconnecting switch DC1, load LP1-23.
The distribution system in Fig. 3 is divided according to the method described above, be layered, be classified, encoded, switching device hierarchical classification
Matrix H 2 is established as follows：
Wherein, first row representation switch type：" 1 " represents breaker, and " 2 " represent disconnecting switch, and " 3 " represent that contact is opened
Close, second is classified as switching branches numbering, and the 3rd is classified as switching device grade, and the 4th is classified as switching device place feeder line numbering, the
Five are classified as switching device level.
Before the computation, employ such as the component reliability data in table 1 below, and assume the action message of breaker 100%,
The switching time of disconnecting switch and interconnection switch is 1h.
| Element title | Fault rate (secondary/a) | Repair time h |
| Circuit | 0.065 | 5 |
| Transformer | 0.015 | 200 |
| Breaker | 0.006 | 4 |
| Disconnecting switch | 0.006 | 4 |
The power distribution system components reliability data of table 1
By the above method, it is calculated such as the result in table 2：
| Reliability index | SAIFI | SAIDI | CAIDI | ASAI | EENS |
| Ergodic algorithm | 1.9778 | 11.0747 | 5.5994 | 0.9987 | 58.96 |
| Disregard switch fault | 1.9778 | 11.0747 | 5.5994 | 0.9987 | 58.96 |
| Meter and switch fault | 2.0078 | 11.173 | 5.5647 | 0.9987 | 59.45 |
The IEEE-RBTS Bus6 Reliability Indexes of table 2
Note：SAIFI is that system averagely powers off Frequency Index, unit：Times/year；SAIDI is the average interruption duration of system
Index, unit：H/；CAIDI is customer average interruption duration index, unit h/；ASAI is that the average electricity consumption of system can
With rate index；EENS is that system lacks power supply figureofmerit, unit：MWh/.
The used time comparative result such as table 3 of identical calculations is carried out with traditional analytic method：
| Type | Appraisal procedure | Calculate the time |
| Analytic method | Ergodic algorithm | 0.3s |
| The inventive method | 0.02s |
The typical examples of table 3 calculate the time
In summary, from table 2 and table 3 as can be seen that carrying out reliability assessment to IEEE-RBTS Bus6 distribution systems
When, the inventive method can obtain accurate result of calculation, and substantially increase computational efficiency.
The embodiment of the present invention is by using the switching device in distribution system as boundary element, using breadth traversal algorithm, inciting somebody to action
Complicated distribution is converted into simple radial distribution system, so by the element divisions in distribution system into multiple element piecemeal
Afterwards to switching device carry out hierarchical setting, and it is assumed that some element piecemeal break down, and successively disconnect one to failure
In the case of the high-level switching device that element piecemeal shields, according in the load and power distribution network being connected with element piecemeal
The annexation of main power source or stand-by power supply, carry out influence of the failure judgement element piecemeal to each load reliability, finally count
Influence of all element piecemeal failures to each load reliability, to calculate the reliability index of distribution system, weight can be avoided
Each element in distribution system is traveled through again, so as to reduce the amount of calculation of distribution Power System Reliability, substantially increases power distribution system
The efficiency for Calculation of Reliability of uniting.
Embodiment two
The embodiments of the invention provide a kind of reliability evaluation device, the side described in embodiment one is realized
Method, referring to Fig. 4, the device can include：Split module 201, setup module 202, processing module 203, judge module 204, meter
Calculate module 205.
Split module 201, for using the switching device in distribution system as boundary element, using breadth traversal algorithm, inciting somebody to action
Element divisions in distribution system include into multiple element piecemeal, switching device：In breaker, disconnecting switch, interconnection switch
At least one, element includes：Circuit or transformer.
In the present embodiment, distribution system is divided by boundary condition of switching device, forms multiple element piecemeal,
The repetition traversal to each individual component can be reduced in follow-up calculate, and then reduce calculation procedure, improve computational efficiency.
Setup module 202, it is split according to rule from the near to the remote for basis and the distance of main power source in distribution system
Close device and carry out hierarchical setting, and element piecemeal is concluded into the level of high-level switching device adjacent thereto.
In the present embodiment, there are some switching devices that protection act is played to element in distribution system, element piecemeal is being drawn
Timesharing, it can be connected with two switching devices, setup module 202 can conclude element piecemeal to the of a relatively high switching device of level
Level in.
Processing module 203, for assuming that some element piecemeal breaks down, and one is disconnected successively to fault element piecemeal
The high-level switching device to shield.
In the present embodiment, processing module 203 needs to disconnect the switching device for playing fault element piecemeal protection act, and
And the switching device of the level greater than or equal to fault element piecemeal, furthermore, it is necessary to once disconnect a switching device, that is, disconnect
During one switching device, other qualified switching means into conduction.
Judge module 204, for according to main power source in the load and power distribution network that are connected with element piecemeal or stand-by power supply
Annexation, carry out influence of the failure judgement element piecemeal to each load reliability.
In the present embodiment, judge module 204 is according to main power source or standby in the load and power distribution network being connected with element piecemeal
With the annexation of power supply, carry out influence of the failure judgement element piecemeal to each load reliability, can avoid judging power distribution system
Each influence of the element fault to load reliability, greatly reduces amount of calculation, improves computational efficiency in system.
Computing module 205, for counting influence of all element piecemeal failures to each load reliability, calculate distribution
The reliability index of system, the reliability index of distribution system include：When system averagely powers off frequency, system is averaged power-off continuous
Between, at least one of the average interruption duration of user, the average electricity consumption availability of system, the average electricity consumption degree of unavailability of system.
Specifically, judge module 204, when being additionally operable to disconnect a breaker, judge whether load is connected with main power source, if
It is connected, then judges the load for A type loads, the fault time that A types load is influenceed by fault element piecemeal is 0, probability of malfunction
For 0；
Judge module 204, it is additionally operable to disconnect one when inner switch, judges whether load connects with main power source or stand-by power supply
Connect, if being connected with main power source, judge the load for Type B load, the fault time that Type B load is influenceed by fault element piecemeal is
The operating time of disconnecting switch, probability of malfunction are the probability of failure of disconnecting switch；If be connected with stand-by power supply and not with main power source
It is connected, judges the load for c-type load, the fault time that c-type load is influenceed by fault element piecemeal operates for disconnecting switch
Time and interconnection switch operating time sum, probability of malfunction are the fault rate of disconnecting switch；
Judge module 204, it is additionally operable to when disconnecting a breaker or every inner switch, if load neither connects with main power source
Connect, and be not connected with stand-by power supply, then judge the load for D type loads, during the failure that D types load is influenceed by fault element piecemeal
Between be the fault element piecemeal average failure duration, probability of malfunction be element piecemeal fault rate.
In the present embodiment, the reliability index of above-mentioned distribution system is mainly related to user that it is mainly by load
Reliability effect, after influence of each element piecemeal failure to load reliability is calculated, pass through count calculate, you can
To the reliability index of distribution system.
Further, the average failure duration of element piecemeal and fault rate are calculated by equation below：
Wherein, λi、riElement i fault rate and average failure duration in respectively element piecemeal s；λs、rsRespectively
Element piecemeal s fault rate and trouble duration；N represents element total number in element piecemeal s.
Alternatively, element also includes fuse.I.e. if including fuse in element piecemeal, then need to compensate fuse pair
The average failure duration of element piecemeal and the influence of fault rate.
Further, the average failure duration and fault rate for including the element piecemeal of fuse pass through equation below
Calculate：
Wherein, λj、rjWhen element j fault rate and mean failure rate continue in the respectively element piecemeal s1 comprising fuse
Between；λs1、rs1The respectively fault rate and trouble duration of the element piecemeal s1 comprising fuse；M is represented in element piecemeal s1
Element total number.
The embodiment of the present invention is by using the switching device in distribution system as boundary element, using breadth traversal algorithm, inciting somebody to action
Complicated distribution is converted into simple radial distribution system, so by the element divisions in distribution system into multiple element piecemeal
Afterwards to switching device carry out hierarchical setting, and it is assumed that some element piecemeal break down, and successively disconnect one to failure
In the case of the high-level switching device that element piecemeal shields, according in the load and power distribution network being connected with element piecemeal
The annexation of main power source or stand-by power supply, carry out influence of the failure judgement element piecemeal to each load reliability, finally count
Influence of all element piecemeal failures to each load reliability, to calculate the reliability index of distribution system, weight can be avoided
Each element in distribution system is traveled through again, so as to reduce the amount of calculation of distribution Power System Reliability, substantially increases power distribution system
The efficiency for Calculation of Reliability of uniting.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
It should be noted that：The reliability evaluation device that above-described embodiment provides is realizing that distribution system is reliable
During property appraisal procedure, only with the division progress of above-mentioned each functional module for example, in practical application, it can incite somebody to action as needed
Above-mentioned function distribution is completed by different functional modules, i.e., the internal structure of equipment is divided into different functional modules, with complete
Into all or part of function described above.In addition, the reliability evaluation device that above-described embodiment provides is with matching somebody with somebody
Electric system reliability estimation method embodiment belongs to same design, and its specific implementation process refers to embodiment of the method, here no longer
Repeat.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, by program the hardware of correlation can also be instructed to complete, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of Evaluation Method of Distribution Systems Reliability, it is characterised in that methods described includes：
Using the switching device in distribution system as boundary element, using breadth traversal algorithm, by the element divisions in distribution system
Into multiple element piecemeal, the switching device includes：It is at least one in breaker, disconnecting switch, interconnection switch, the element
Including：Circuit or transformer；
According to the distance with main power source in distribution system, according to rule from the near to the remote, hierarchical is carried out to the switching device
Set, and the element piecemeal is concluded into the level of high-level switching device adjacent thereto；
It is assumed that some element piecemeal breaks down, and a high-level to be shielded to fault element piecemeal is disconnected successively and is opened
Close device；
According to the annexation of main power source or stand-by power supply in the load and power distribution network being connected with element piecemeal, carry out failure judgement member
Influence of the part piecemeal to each load reliability；
Influence of all element piecemeal failures to each load reliability is counted, calculates the reliability index of distribution system, institute
Stating the reliability index of distribution system includes：System averagely powers off the average interruption duration of frequency, system, user averagely powers off
At least one of duration, the average electricity consumption availability of system, the average electricity consumption degree of unavailability of system.
2. according to the method for claim 1, it is characterised in that the load and power distribution network that the basis is connected with element piecemeal
The annexation of middle main power source or stand-by power supply, carry out influence of the failure judgement element piecemeal to each load reliability, including：
When disconnecting a breaker, judge whether load is connected with main power source, if being connected, judge the load for A type loads, institute
The fault time that state A types load is influenceed by fault element piecemeal is 0, and probability of malfunction is also 0；
Disconnect one and judge whether load is connected with main power source or stand-by power supply when inner switch, if being connected with main power source, sentence
The disconnected load is Type B load, and the fault time that the Type B load is influenceed by fault element piecemeal is when operating of disconnecting switch
Between, probability of malfunction is the probability of failure of disconnecting switch；If being connected with stand-by power supply and not being connected with main power source, judge that the load is
C-type load, operating time and interconnection switch of the fault time that the c-type load is influenceed by fault element piecemeal for disconnecting switch
Operating time sum, probability of malfunction are the fault rate of disconnecting switch；
When disconnecting a breaker or every inner switch, if load is neither connected with main power source, and is not connected with stand-by power supply, then
The load is judged for D type loads, and the fault time that the D types load is influenceed by fault element piecemeal is the fault element piecemeal
Average failure duration, probability of malfunction are the fault rate of element piecemeal.
3. according to the method for claim 2, it is characterised in that the average failure duration and failure of the element piecemeal
Rate is calculated by equation below：
<mrow>
<msub>
<mi>&lambda;</mi>
<mi>s</mi>
</msub>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>i</mi>
</msub>
</mrow>
<mrow>
<msub>
<mi>r</mi>
<mi>s</mi>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>i</mi>
</msub>
<msub>
<mi>r</mi>
<mi>i</mi>
</msub>
</mrow>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>i</mi>
</msub>
</mrow>
</mfrac>
</mrow>
Wherein, λi、riElement i fault rate and average failure duration in respectively element piecemeal s；λs、rsRespectively element
Piecemeal s fault rate and trouble duration；N represents element total number in the element piecemeal s.
4. according to the method for claim 3, it is characterised in that the element also includes fuse.
5. according to the method for claim 4, it is characterised in that the average failure duration and failure of the element piecemeal
Rate is calculated by equation below：
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mrow>
<msub>
<mi>&lambda;</mi>
<mrow>
<mi>s</mi>
<mn>1</mn>
</mrow>
</msub>
<mo>=</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mi>p</mi>
<mo>)</mo>
</mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>m</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>j</mi>
</msub>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<msub>
<mi>r</mi>
<mrow>
<mi>s</mi>
<mn>1</mn>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>m</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>j</mi>
</msub>
<msub>
<mi>r</mi>
<mi>j</mi>
</msub>
</mrow>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>m</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>j</mi>
</msub>
</mrow>
</mfrac>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
Wherein, λj、rjElement j fault rate and average failure duration in the respectively element piecemeal s1 comprising fuse；
λs1、rs1The respectively fault rate and trouble duration of the element piecemeal s1 comprising fuse；M represents member in element piecemeal s1
Part total number.
6. a kind of evaluating reliability of distribution network device, it is characterised in that described device includes：
Split module, for using the switching device in distribution system as boundary element, using breadth traversal algorithm, by distribution system
In element divisions include into multiple element piecemeal, the switching device：In breaker, disconnecting switch, interconnection switch at least
One, the element includes：Circuit or transformer；
Setup module, for according to the distance with main power source in distribution system, according to rule from the near to the remote, being filled to the switch
Put and carry out hierarchical setting, and the element piecemeal is concluded into the level of high-level switching device adjacent thereto；
Processing module, for assuming that some element piecemeal breaks down, and one is disconnected successively protection is risen to fault element piecemeal
The high-level switching device of effect；
Judge module, closed for the connection according to main power source or stand-by power supply in the load and power distribution network being connected with element piecemeal
System, carrys out influence of the failure judgement element piecemeal to each load reliability；
Computing module, for counting influence of all element piecemeal failures to each load reliability, calculate distribution system
Reliability index, the reliability index of the distribution system include：When system averagely powers off frequency, system is averaged power-off continuous
Between, at least one of the average interruption duration of user, the average electricity consumption availability of system, the average electricity consumption degree of unavailability of system.
7. device according to claim 6, it is characterised in that the judge module, when being additionally operable to disconnect a breaker,
Judge whether load is connected with main power source, if being connected, judge the load for A type loads, the A types load is by fault element point
The fault time that block influences is 0, and probability of malfunction is also 0；
The judge module, it is additionally operable to disconnection one and judges whether load is connected with main power source or stand-by power supply when inner switch,
If being connected with main power source, the load is judged for Type B load, the fault time that the Type B load is influenceed by fault element piecemeal
For the operating time of disconnecting switch, probability of malfunction is the probability of failure of disconnecting switch；If be connected with stand-by power supply and not with main electricity
Source is connected, and judges the load for c-type load, and the fault time that the c-type load is influenceed by fault element piecemeal is disconnecting switch
Operating time and interconnection switch operating time sum, probability of malfunction is the fault rate of disconnecting switch；
The judge module, it is additionally operable to when disconnecting a breaker or every inner switch, if load is neither connected with main power source, again
It is not connected with stand-by power supply, then judges the load for D type loads, during the failure that the D types load is influenceed by fault element piecemeal
Between be the fault element piecemeal average failure duration, probability of malfunction be element piecemeal fault rate.
8. device according to claim 7, it is characterised in that the average failure duration and failure of the element piecemeal
Rate is calculated by equation below：
<mrow>
<msub>
<mi>&lambda;</mi>
<mi>s</mi>
</msub>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>i</mi>
</msub>
</mrow>
<mrow>
<msub>
<mi>r</mi>
<mi>s</mi>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>i</mi>
</msub>
<msub>
<mi>r</mi>
<mi>i</mi>
</msub>
</mrow>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>i</mi>
</msub>
</mrow>
</mfrac>
</mrow>
Wherein, λi、riElement i fault rate and average failure duration in respectively element piecemeal s；λs、rsRespectively element
Piecemeal s fault rate and trouble duration；N represents element total number in the element piecemeal s.
9. device according to claim 8, it is characterised in that the element also includes fuse.
10. device according to claim 9, it is characterised in that the average failure duration of the element piecemeal and event
Barrier rate is calculated by equation below：
<mfenced open = "{" close = "">
<mtable>
<mtr>
<mtd>
<mrow>
<msub>
<mi>&lambda;</mi>
<mrow>
<mi>s</mi>
<mn>1</mn>
</mrow>
</msub>
<mo>=</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mi>p</mi>
<mo>)</mo>
</mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>m</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>j</mi>
</msub>
</mrow>
</mtd>
</mtr>
<mtr>
<mtd>
<mrow>
<msub>
<mi>r</mi>
<mrow>
<mi>s</mi>
<mn>1</mn>
</mrow>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>m</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>j</mi>
</msub>
<msub>
<mi>r</mi>
<mi>j</mi>
</msub>
</mrow>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>m</mi>
</munderover>
<msub>
<mi>&lambda;</mi>
<mi>j</mi>
</msub>
</mrow>
</mfrac>
</mrow>
</mtd>
</mtr>
</mtable>
</mfenced>
Wherein, λj、rjElement j fault rate and average failure duration in the respectively element piecemeal s1 comprising fuse；
λs1、rs1The respectively fault rate and trouble duration of the element piecemeal s1 comprising fuse；M represents member in element piecemeal s1
Part total number.
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| FR3107403A1 (en) * | 2020-02-19 | 2021-08-20 | Schneider Electric Industries Sas | Determination of a state of reliability of an electrical network |
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