CN109510205A - A kind of distribution network load turns for decision Analysis method - Google Patents
A kind of distribution network load turns for decision Analysis method Download PDFInfo
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- CN109510205A CN109510205A CN201910008649.0A CN201910008649A CN109510205A CN 109510205 A CN109510205 A CN 109510205A CN 201910008649 A CN201910008649 A CN 201910008649A CN 109510205 A CN109510205 A CN 109510205A
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- 238000012937 correction Methods 0.000 claims description 6
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- 230000015572 biosynthetic process Effects 0.000 claims description 3
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Classifications
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
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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]
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Abstract
The invention belongs to technical field of power systems, and what is involved is a kind of distribution network loads to turn for decision Analysis method.Turn including 1) distribution network load for security verification；2) distribution network load turns to verify for reliability；3) distribution network load turns to verify for corrective；4) distribution network load turns to select for optimal case.The present invention overcomes conventional electrical distribution net load transfer that the shortcomings that leading to load transfer time length, low efficiency, poor reliability is manually roughly calculated mainly by regulation personnel, ensure that distribution network load turns for safe, reliable, efficient, the safety in production of promotion power distribution network and good service are horizontal.
Description
Technical field
The invention belongs to technical field of power systems, and what is involved is a kind of distribution network loads to turn for decision Analysis side
Method.
Background technique
Power distribution network is directly facing huge numbers of families, is the key link for ensureing customer power supply reliability, due to distribution net work structure
Complexity, circuit element is various, running environment is severe, and distribution network line fault is caused to take place frequently.In order to ensure power supply reliability, in addition to
Power distribution network faults itself is required to carry out power distribution network in accident treatments such as the urgent defect elimination of higher level's power grid, substation's internal faults
Load transfer.
At present mainly by when value regulation personnel according to route current loads, by being manually roughly calculated, in conjunction with operating experience
Determine turning solution, turn, poor reliability lower for efficiency, under power distribution network wiring increasingly complicated developing state, it is many and diverse and with
The load transfer of machine increases huge operating pressure to regulation personnel, and power distribution network safety in production is made to face a severe test.Only
By regulation personnel manually calculate determine turn line load can not deeply be studied and judged for route, easily cause when load is heavier by
Turn for circuit overload, while being also difficult to analyze the operation conditions and particular form turned for route comprehensively, if transferring a load onto event
Barrier rate very high route is easy expansion accident instead, seriously affects the power supply reliability and power grid enterprises' good service of user
Favorable image.
Summary of the invention
To overcome the shortcomings of that existing distribution network load turns for method, the present invention provides a kind of distribution network load and turns to determine for auxiliary
Plan analysis method can help to regulate and control personnel selection load transfer optimal case in accident treatment.
The present invention adopts the following technical solutions to achieve, and a kind of distribution network load turns for decision Analysis method, packet
Include following steps:
1) distribution network load turns for security verification；
2) distribution network load turns to verify for reliability；
3) distribution network load turns to verify for corrective；
4) distribution network load turns to select for optimal case.
The dispatch automated system that the present invention refers to is that power industry regulates and controls the common operation of power networks control technology branch of personnel
Hold system, such as D5000, D5200 system of southern auspicious production.
Step (1) distribution network load turns
1-1) route to be produced and its all preceding 3 days history load curves for being transferred to route are read from dispatch automated system；
1-2) line load curve to be produced is transferred to that can be transferred to the additional combining one by one of line load curve, rejecting, produces line
Abnormal load during the adjustment of road usual manner；
According to load transfer time requirement, extracted from preceding 3 days history load curves of synthesis in the corresponding periodkSynthetic thread
The peak load on roadI kmax ,k=1,2 ...,m,mFor route to be produced get in touch with number of lines, calculate each item be transferred to route turn for peace
Overall coefficientS k ,
,
In formulaI kN It iskItem is transferred to the current-carrying limit of route；IfS k ≤ 0.9, then this is transferred to route by security verification, incites somebody to action
It is all to be denoted as by the number of lines of security verificationnIfn>=1, then the verification of (2) reliability is entered step, it is on the contrary then show
All to be transferred to route not by security verification, producing line load can not turn to supply, then Flow ends, i.e., do not pass through safety
The route of verification does not enter reliability verification.
Step (2) distribution network load turns the specific steps that verify for reliability
The historical data that permanent fault occurs for every route 2-1) is read from dispatch automated system, by historical failure data point
Road, protection act two classes of tripping are drawn for single-phase earthing, counts the number that two class failures occur for each route, history of forming event respectively
Hinder database, and is timely updated database according to power grid real time execution situation；
2-2) as unit of year, the historical failure number that step 2-1) is obtained as abscissa, sit as vertical by the number of lines
Mark, obtains annual the whole network line fault number distribution map, the number of lines increases along the ordinate direction；
2-3) according to 2-2) obtained in year the whole network line fault number distribution map, obtain the distribution of the number of stoppages over the years annual
Characteristic determines current year number of stoppages green alarm limit valueL A, yellow alarm limit valueL B；
2-4) every is passed through the current year historical failure number for being transferred to route of security verificationL 1WithL 2After addition with phase
The alarm limit value answered compares, and obtains risk class, whereinL 1Indicate that current year single-phase earthing draws road number,L 2Indicate that the current year protects
Shield acts tripping times；
2-5) risk of selection is elementary is transferred to route, and the number of lines is denoted asl, and corresponding risk management and control is carried out, such asl≥
1, then it enters step (3) distribution network load and turns to verify for corrective.
Compare and show that the method and step of risk class is as follows:
aIf)L 1+L 2<L A, then it is green early warning, the reliability for being transferred to route is higher, and regulation personnel should reinforce turning to supervise for route
Depending on；
bIf)L A≤L 1+L 2≤L B, then it is yellow early warning, the reliability for being transferred to route is general, and regulation personnel should analyze comprehensively to be turned
For dangerous point, prediction failure is carried out；
cIf)L 1+L 2>L B, then it is red early warning, the reliability for being transferred to route is lower, and it is pre- that regulation personnel should formulate accident treatment
Case, notice operation maintenance personnel are reinforced making an inspection tour, and notice sales department carries out responsible consumer and protects electricity.
The distribution network load turns to include the following steps: for corrective method of calibration
3-1) according to the special method of operation and current service requirement that can be transferred to route, calculate same risk grade is respectively transferred to line
Road correction factorM i ,
,
Wherein M (1) indicates that route has important guarantor's electricity, and value is -4；M (2) indicates that route has small power supply reclosing to exit, value
It is -2；M (3) indicates that route turns to need to adjust for protection definite value, and value is -1；M (4) indicates route without special service requirement, value
It is 0；
Same risk grade that step 3-1) is obtained respectively 3-2) is transferred to the route sequence descending by correction factor, arrangement
Form load transfer priority sequence table.
The step (4), which is determined by regulation personnel by the priority sequence table that step (3-2) obtains, optimal is transferred to route.
The method of the present invention is practical, mainly by when value regulation personnel are manually rough when overcoming conventional electrical distribution net load transfer
Calculating leads to the shortcomings that load transfer time length, low efficiency, poor reliability, according to route historical load curve to load transfer into
Row security verification carries out reliability verification to load transfer according to route historical failure data, while according to the special of route
The method of operation and current service requirement verify being modified property of load transfer, to ensure that distribution network load turns for that can pacify
Entirely, reliably, efficiently implement, strong promotion power distribution network safety in production and good service are horizontal.
Detailed description of the invention
Below with reference to attached drawing, the invention will be further described:
Fig. 1 is that distribution network load of the present invention turns for decision Analysis method flow diagram；
Fig. 2 is that distribution network load turns for security verification method flow diagram；
Fig. 3 is that distribution network load turns for reliability method of calibration flow chart.
Specific embodiment
Further details of elaboration made to the present invention in the following with reference to the drawings and specific embodiments, but the invention is not limited to
Following implementation.
As shown in Figure 1, distribution network load of the present invention turn for decision Analysis method the following steps are included:
Step 1, distribution network load turn for security verification；
Fig. 2 is that distribution network load turns for security verification method flow diagram, in this embodiment, from dispatch automated system
Read route to be produced and its all preceding 3 days history load curves for being transferred to route, will line load curve be produced with can
It is transferred to the additional combining one by one of line load curve, closes solution ring test, scheduled outage transfer load etc. often due to being transferred to, producing route
Rule mode adjusts the anomalous variation that can cause line load, and maximum turns for the pre- of load when to eliminate usual manner adjustment to failure
It surveys, by regulation personnel after executing usual manner adjustment every time, will be transferred to, produces the load before line load is adjusted by mode and deposit
Storage, reject be transferred to, produce route usual manner adjustment during peakload.According to load transfer time requirement, from synthesis
It is extracted on preceding 3 days history load curves in the corresponding periodkThe peak load of synthetic lineI kmax ,k=1,2 ...,m,mFor to
Produce route contact number of lines, calculate each item be transferred to route turn for safety coefficientS k ,
In formulaI kN It iskItem is transferred to the current-carrying limit of route.According to distribution network line safe operation and alarm limit value requirement, ifS k
≤ 0.9, then this is transferred to route by security verification, is denoted as all by the number of lines of security verificationnIfn
>=1, then enter reliability verify, on the contrary it is then show it is all be transferred to routes do not pass through security verification, produce line load without
Method turns to supply.
Step 2, distribution network load turn to verify for reliability；
Fig. 3 is that distribution network load turns for reliability method of calibration flow chart, in this embodiment, from dispatch automated system
The historical data that permanent fault occurs for every route is read, historical failure data is divided into single-phase earthing and draws road, protection act
Trip two classes, counts the number that two class failures occur for each route respectively, history of forming Mishap Database, and real-time according to power grid
Operating condition timely updates database.The form of expression of one same failure of route can mutually convert, and may start to behave as
Single-phase earthing just develops into line tripping after a period of time, or develops again after line tripping successful reclosing occurs for a period of time
Can not be overlapped the accuracy and integrality for once for principle, guaranteeing data only being counted with the same failure, if occurring single-phase to connect
Ground is then uniformly denoted as single-phase earthing drawing Lu Yici with line tripping again, if development is to be overlapped not again after tripping successful reclosing occurs
At being then uniformly denoted as, protection act tripping is primary.As unit of year, using historical failure number as abscissa, the number of lines
(by sequence from less to more) is used as ordinate, obtains annual the whole network line fault number distribution map, according to annual failure time over the years
Several distribution characters determines that the current year number of stoppages alerts green alarm limit valueL A, yellow alarm limit valueL B.Generally desirable 3-5
The average time that annual the whole network number of stoppages is distributed preceding 20% is green alarm limit valueL A, take 3-5 year the whole network number of stoppages point
70% average time is yellow alarm limit value before clothL B, route current year history is transferred to by security verification by every
The number of stoppagesL 1、L 2After addition compared with corresponding alarm limit value, risk class is obtained, L 1Indicate that single-phase earthing draws road number,L 2Indicate protection act tripping times, specific as follows:
aIf)L 1+L 2<L A, green early warning, it is higher to be transferred to circuit reliability, and regulation personnel should reinforce turning for line supervision；
bIf)L A≤L 1+L 2≤L B, yellow early warning, it is general to be transferred to circuit reliability, and regulation personnel should analyze comprehensively to be turned for danger
Point, carries out prediction failure；
cIf)L 1+L 2>L B, red early warning is transferred to that circuit reliability is lower, and regulation personnel should formulate accident treatment prediction scheme, notice
Operation maintenance personnel is reinforced making an inspection tour, and notice sales department carries out responsible consumer and protects electricity.
Risk of selection is elementary to be transferred to route, and the number of lines is denoted asl, and corresponding risk management and control is carried out, such asl≥
1, then enter corrective and verifies.
Step 3, basis can be transferred to the special method of operation and current service requirement of route, calculate each of same risk grade
It is transferred to route correction factorM i ,
WhereinM(1) indicating that route has important guarantor's electricity, value is -4,M(2) indicate that route has small power supply reclosing to exit, value
It is -2,M(3) indicating that route turns to need to adjust for protection definite value, value is -1,M(4) indicate route without special service requirement, value
It is 0.The route that is respectively transferred to of same risk grade forms load transfer priority sequence table by the descending arrangement of correction factor.
Step 4, regulation personnel are prioritized to table and determine optimal be transferred to route.
Embodiment of above is the preferred embodiment of the present invention, is not to impose any restrictions to the present invention, it is any not
It is detached from made by essence of the present invention and simply modifies or convert, within the scope of protection of the patent of the invention.
Claims (6)
1. a kind of distribution network load turns for decision Analysis method, which comprises the following steps:
1) distribution network load turns for security verification；
2) distribution network load turns to verify for reliability；
3) distribution network load turns to verify for corrective；
4) distribution network load turns to select for optimal case.
2. distribution network load according to claim 1 turns for decision Analysis method, which is characterized in that step (1) is matched
Network load turns
1-1) route to be produced and its all preceding 3 days history load curves for being transferred to route are read from dispatch automated system；
1-2) line load curve to be produced is transferred to that can be transferred to the additional combining one by one of line load curve, rejecting, produces line
Abnormal load during the adjustment of road usual manner；
According to load transfer time requirement, extracted from preceding 3 days history load curves of synthesis in the corresponding periodkSynthetic thread
The peak load on roadI kmax ,k=1,2 ...,m,mFor route to be produced get in touch with number of lines, calculate each item be transferred to route turn for peace
Overall coefficientS k ,
,
In formulaI kN It iskItem is transferred to the current-carrying limit of route；IfS k ≤ 0.9, then this is transferred to route by security verification, incites somebody to action
It is all to be denoted as by the number of lines of security verificationnIfn>=1, then the verification of (2) reliability is entered step, it is on the contrary then show
All to be transferred to route not by security verification, producing line load can not turn to supply, then Flow ends, i.e., do not pass through safety
The route of verification does not enter reliability verification.
3. distribution network load according to claim 1 turns for decision Analysis method, which is characterized in that step (2) is matched
Network load turns the specific steps that verify for reliability
The historical data that permanent fault occurs for every route 2-1) is read from dispatch automated system, by historical failure data point
Road, protection act two classes of tripping are drawn for single-phase earthing, counts the number that two class failures occur for each route, history of forming event respectively
Hinder database, and is timely updated database according to power grid real time execution situation；
2-2) as unit of year, the historical failure number that step (2-1) is obtained as abscissa, sit as vertical by the number of lines
Mark, obtains annual the whole network line fault number distribution map, the number of lines increases along the ordinate direction；
2-3) year the whole network line fault number distribution map according to obtained in (2-2) obtains point of the annual number of stoppages over the years
Cloth characteristic determines current year number of stoppages green alarm limit valueL A, yellow alarm limit valueL B；
2-4) every is passed through the current year historical failure number for being transferred to route of security verificationL 1WithL 2After addition and accordingly
Alarm limit value compare, obtain risk class, whereinL 1Indicate that current year single-phase earthing draws road number,L 2Indicate current year protection
Act tripping times；
2-5) risk of selection is elementary is transferred to route, and the number of lines is denoted asl, and corresponding risk management and control is carried out, such asl≥
1, then it enters step (3) distribution network load and turns to verify for corrective.
4. distribution network load according to claim 3 turns for decision Analysis method, which is characterized in that the step
Relatively show that the method and step of risk class is as follows in (2-4):
aIf)L 1+L 2<L A, then it is green early warning, the reliability for being transferred to route is higher, and regulation personnel should reinforce turning to supervise for route
Depending on；
bIf)L A≤L 1+L 2≤L B, then it is yellow early warning, the reliability for being transferred to route is general, and regulation personnel should analyze comprehensively to be turned to supply
Prediction failure is carried out in dangerous point；
cIf)L 1+L 2>L B, then it is red early warning, the reliability for being transferred to route is lower, and it is pre- that regulation personnel should formulate accident treatment
Case, notice operation maintenance personnel are reinforced making an inspection tour, and notice sales department carries out responsible consumer and protects electricity.
5. distribution network load according to claim 1 turns for decision Analysis method, which is characterized in that the power distribution network
Load transfer corrective method of calibration, includes the following steps:
3-1) according to the special method of operation and current service requirement that can be transferred to route, calculate same risk grade is respectively transferred to line
Road correction factorM i ,
,
Wherein M (1) indicates that route has important guarantor's electricity, and value is -4；M (2) indicates that route has small power supply reclosing to exit, value
It is -2；M (3) indicates that route turns to need to adjust for protection definite value, and value is -1；M (4) indicates route without special service requirement, value
It is 0；
Same risk grade that step (3-1) obtains respectively 3-2) is transferred to the route sequence descending by correction factor, row
Column form load transfer priority sequence table.
6. distribution network load according to claim 1 turns for decision Analysis method, which is characterized in that the step
(4) it is determined by regulation personnel by the priority sequence table that step (3-2) obtains and optimal is transferred to route.
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| CN110263078A (en) * | 2019-08-14 | 2019-09-20 | 广东电网有限责任公司佛山供电局 | A kind of distribution line heavy-overload Intelligent statistical system and statistical method |
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| CN113541128A (en) * | 2021-06-24 | 2021-10-22 | 深圳供电局有限公司 | Power distribution network feeder line power supply transfer method and device, computer equipment and storage medium |
| CN113809822A (en) * | 2021-08-12 | 2021-12-17 | 国网浙江嘉善县供电有限公司 | Power distribution network load rapid transfer auxiliary decision system based on PI database |
| CN115603465A (en) * | 2022-11-07 | 2023-01-13 | 安徽网华信息科技有限公司（Cn） | Power distribution network load transfer data monitoring and regulating system and method based on big data |
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| CN113809822A (en) * | 2021-08-12 | 2021-12-17 | 国网浙江嘉善县供电有限公司 | Power distribution network load rapid transfer auxiliary decision system based on PI database |
| CN115603465A (en) * | 2022-11-07 | 2023-01-13 | 安徽网华信息科技有限公司（Cn） | Power distribution network load transfer data monitoring and regulating system and method based on big data |
| CN115603465B (en) * | 2022-11-07 | 2023-11-07 | 安徽网华信息科技有限公司 | Power distribution network load transfer data monitoring and controlling system and method based on big data |
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