CN103345713B - A kind of ultra-large electric power networks synchronous safety nucleus correcting system design method - Google Patents
A kind of ultra-large electric power networks synchronous safety nucleus correcting system design method Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The present invention relates to a kind of ultra-large electric power networks synchronous safety nucleus correcting system design methods, which comprises (1) collects data；(2) it is verified；(3) it generates bulk power grid synchronous safety calculation and check data check and handles log；(4) calculation and check data are verified and is corrected in advance；(5) it quickly calculates.The present invention is based on conventional securities to check constraint blocking algorithm, sufficiently consideration mass data receive send and pretreatment, multi-stage user participate in, the decoupling of information local sharing mode, data adaptive the technical requirements such as calculates and proposes thoughtful system scheme comprehensively, design can assurance function finally realize and stable and high effective operation.
Description
Technical field
The invention belongs to dispatching automation of electric power systems, in particular to a kind of ultra-large electric power networks synchronous safety school
Core design method.
Background technique
The power Transmission pattern based on extra-high voltage, high voltage ac/dc power grid has been gradually formed at present, has thoroughly been broken
The isolated power network structure of hair transmission & distribution one in traditional area.Completely new electric system is able to solve state's interior power, power load distributing area
The serious situation uneven, efficiency of energy utilization is low in domain, but the new method of operation also works out completely electric system planning business
Sufficient Safety guide requires power grid ground state and open-ended line to stablize directive/guide and proposes new challenge.
Check constraint blocking algorithm based on conventional security, be unable to fully consideration mass data receive send and be intended to handle,
The technical requirements such as multi-stage user participates in, information local sharing mode decouples, and data adaptive calculates.It is badly in need of a kind of comprehensively thoughtful
System design scheme can guarantee that system function is finally realized and stable and high effective operation.
Summary of the invention
In view of the deficiencies of the prior art, the present invention proposes a kind of solve in the extensive electric power networks progress multilayer of labyrinth
Grade user participates in synchronous security analysis system (hereinafter referred to as bulk power grid synchronous safety is checked) design method.Bulk power grid is synchronous
Security Checking needs to have the following conditions: 1, stronger synchronization process magnanimity planning data ability；2, it quickly generates and checks day whole day
Calculate section；3, calculating process is accurately quick；4, result shows full apparent, retrieves information fast and easy；5, whole consideration is more
Level user collaborative participates in feature.
Based on above-mentioned technical requirements, should be included at least to guarantee to reach practical level requirement, when system designs in
Hold:
1, database table design and specification, business data synchronous exchange scheme；
2, the pre- verifying function of check data；
3, it checks parameter setting and calculates control function；
4, result warning information concentrates analytic function；
5, full-time check section tidal current Integrated query function；
6, locally, under sharing mode information decouples function to total system.
The design of this external system also needs whole to consider that magnanimity calculates and be likely to occur local data's deterioration and more in source data
The problems such as ground multi-layer network communication stability.
The purpose of the present invention is adopt the following technical solutions realization:
A kind of ultra-large electric power networks synchronous safety nucleus correcting system design method, which is characterized in that the described method includes:
(1) data are collected；
(2) it is verified；
(3) it generates bulk power grid synchronous safety calculation and check data check and handles log；
(4) calculation and check data are verified and is corrected in advance；
(5) it quickly calculates.
Preferably, the step (1) includes collecting number needed for the bulk power grid synchronous safety that higher level control centre issues is checked
According to.
Preferably, the data include that transmission cross-section limit, transmission cross-section constituent element, equipment power failure plan, system are negative
Lotus prediction, extension set group operation plan, bus load prediction He Fen save total seven major class data of exchange plan.
Preferably, the step (2) the following steps are included:
A, basic verification rule-based knowledge base is established；
B, complex data verification rule-based knowledge base is established；
C, for the data prediction of shaped form load.
Further, the step a includes whether verification seven kinds of data has reported with whether the content of Various types of data is neat
Entirely.
Further, the step b includes the data check rule of shaped form and the data check rule of non-shaped form；
Shaped form data include system loading prediction, bus load prediction, tie line plan and machine unit scheduling plan；
The data of non-shaped form include transmission cross-section Quota List, transmission cross-section constituent element table and equipment power failure planning chart.
Further, the step c includes carrying out data prediction to class of a curve shortage of data and data mutation.
Preferably, the step (5) includes:
I, AC power flow calculates；
II, the uneven active power of calculated equilibrium node；
III, each regional imbalance active power is calculated.
Further, the imbalance power absolute value is less than convergence, then that corrects adjustable unit and load has
Function power, return step II, otherwise trend restrains, and carries out N-1 using power flow solutions and fault set calculates.
Compared with the prior art, the invention has the benefit that
Constraint blocking algorithm is checked the present invention is based on conventional security, and abundant consideration mass data, which receives, to be sent and pre- place
The technical requirements such as reason, multi-stage user participate in, information local sharing mode decouples, and data adaptive calculates propose comprehensively thoughtful
System scheme, design can assurance function finally realize and stable and high effective operation.
1, towards the ultra-large electric power networks of labyrinth, based on basic data and section hair is calculated by the pre- school of electric equilibrium
The Day-ahead static security correction for the adaptive contact line coordination section power tested, which calculates, controls synchronous security analysis function.This
Invention proposes a whole set of and is able to solve domestic large-scale complex electric power networks plans trend methods of risk assessment a few days ago, examines simultaneously
Consider in the case where the planning data of acquisition is of low quality, it is adaptively damp that system according to pre- check results is able to carry out interconnection
Stream calculation, the calculated result accuracy for planning trend after adjustment were significantly improved more in the past, and the system functionization of can satisfy is wanted
It asks；
2, pacified towards the ultra-large electric power networks of labyrinth based on the superior and the subordinate's Integral synchronous static state of expert knowledge library
The Data preprocess function that counts is assessed by whole school.The bulk power grid synchronous safety nucleus correcting system power grid that orients towards the whole country is verified, and is collected into
All kinds of project basis data bulks are big, and transmission link is more, there is the quality fluctuation being difficult to avoid that, the design method considers plan
The data that data are likely to occur are failed to report, and are fallen a little and the problems such as wrong point, can be carried out according to the expert knowledge library strategy specially established
Automatic identification intelligence amendment, and the verification journal file that subsequent computing system can recognize is produced, realize whole process data school
Closed-loop control is tested, the problems such as calculating mistake caused by because of data quality problem is effectively prevented.
Detailed description of the invention
Fig. 1 is bulk power grid synchronous safety nucleus correcting system design function flow chart provided by the invention.
Fig. 2 is complex data synchronization check flow chart provided by the invention.
Fig. 3 is provided by the invention based on expert knowledge library Security Checking data verification method.
Fig. 4 is Interval Power Flow tie--line control method provided by the invention.
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
The mentioned bulk power grid synchronous safety nucleus correcting system design function process of the present invention is as shown in Fig. 1, mainly includes logarithm
According to database design and specification, business data synchronous exchange scheme, the pre- verifying function of check data, check parameter setting and calculating
Control function, result warning information concentrate analytic function, full-time check section tidal current Integrated query function and total system local, total
The design for enjoying information decoupling function under mode is realized.Wherein magnanimity planning data verifying function is designed as shown in Fig. 2.
1 system design mentioned to this programme is described further with reference to the accompanying drawing:
Firstly, adapting to the requirement run simultaneously in different regions, multi-user for guarantee system, Uniting system is needed to run
Required database table, related data specification and data synchronous exchange scheme.
Secondly, need to design magnanimity can be calculated needed for data processing and carry out the check of checking treatment and verified in advance with data
Function.
Data volume needed for checking in view of bulk power grid synchronous safety is huge, and ingredient multiplicity, source is complicated, directly using easily
Computational solution precision difference is caused to even result in the phenomenon that calculating process does not restrain trivial solution generation, therefore need to be before calculating to being collected into
Source data verified, while generating the data check warning information that later period calculation procedure is capable of discrimination.
The Functional Design mainly includes:
1. collecting data needed for the bulk power grid synchronous safety that higher level control centre issues is checked；
2. requiring to verify according to data standard to different classes of data respectively；
3. generating the report of associated check result warning information, reads and use for later period calculation procedure；
4. the influence that shows data check result using dedicated picture user oriented and may be generated to calculated result.
To realize above-mentioned design requirement, introduce based on the superior and the subordinate's Integral synchronous security analysis of expert knowledge library
Count Data preprocess Functional Design.Specific step is as follows:
Step 1: establishing and regular expert knowledge library is verified based on planning data substantially.Including
(1) whether seven kinds of data has reported.Each net, which saves, to be adjusted and should report seven kinds of data by regulation.
(2) whether the content of every class data is complete.
First is that whether the device name of reported data is consistent with D5000 basic model device name；
Second is that whether reported data covers the armamentarium in compass of competency；State's tune can count each net and save the seven class numbers reported
According to time and upper tape number.The minimax that the upper tape number of every one kind data cannot be reported beyond Various types of data in experts database
Range.
Step 2: establishing complex data and verify regular expert knowledge library substantially.Including:
1) the data check rule of shaped form.Shaped form data include system loading prediction, bus load prediction, interconnection
Plan, machine unit scheduling plan, need to verify in have:
(1) data of shaped form whether there is disadvantage situation.
(2) system loading prediction is maximum, no more than limit value, (net adjusts the system loading prediction reported maximum to the minimum and rate of change
Value is no more than 300,000,000 kilowatts, and minimum value is not less than 20,000,000 kilowatts, and the rate of change absolute value between adjacent two o'clock is no more than 30,000,000
Kilowatt).(3) unit plan power generating value must not be higher than unit maximum technology and contribute.
2) non-shaped form data check rule, need to verify in have: the data of non-shaped form are divided into transmission cross-section
Quota List, transmission cross-section constituent element table, equipment power failure planning chart mainly include
(1) maintenance unit is planned out that power is non-zero, and equipment has a power failure is in the unit of power failure, the meter for the period that has a power failure in the works
It draws value and is necessary for 0.
(2) cross-section limitation must have corresponding member definition.Section title in " transmission cross-section Quota List " all must be
Corresponding member definition is found in " transmission cross-section constituent element table ".
Consider grid power equilibrium response, addition overall calibration rule refers mainly to hair and checked by coulomb balance.Due to safety
Check and be directed to 220 kilovolts or more of voltage class, it is therefore desirable to verify 220 kilovolts and above power generation,
Whether balanced by electricity and electricity consumption.
Step 3: for the data prediction of shaped form load.
Since the quality of data directly affects the accuracy of Security Checking calculated result, only data check is not
No more.For shaped form load, shortage of data and data mutation are very big on the influence of the result of Security Checking.Herein in order to improve number
According to quality, class of a curve data are verified based on above-mentioned rule, and data have been carried out to the shaped form data verified out
Pretreatment, realizes the repairing of missing data and the smoothing processing of bad data.
Step 4: forming bulk power grid synchronous safety calculation and check data check and handle log.
The call format of log can be parsed by subsequent calculation procedure.Log domestic demand, which is recorded in detail in Various types of data, to be implemented
Verification rule result situation, can be with quick positioning question by log information.Log information can also pass through remote service
Mode by junior scheduling check, to understand the quality condition of reported data in time and to right the wrong.
After completing data collection and pre- verification, need to design includes to check parameter setting and calculate answering for control function
The miscellaneous quick computing function of structure electric power networks security analysis.In view of China " three China " (East China, North China, Central China) backbone electricity
Web frame is complicated, and electrical node is various, and the planning datas order of accuarcy such as prediction of bus load needed for Security Checking cannot still expire
Needed for foot calculates, therefore needs to introduce the adaptive interconnection verified in advance based on basic data and calculating section hair by electric equilibrium and assist
Adjust the Day-ahead static security correction calculation control method of section power.As shown in figure 4, its specific steps is described as follows:
Step 5: start before calculation and check to each net save the data that report and interregional interconnection section power planned value into
The pre- verification of row and amendment；
Step 6: carrying out AC power flow calculating, then the uneven active power of calculated equilibrium node, calculates each region not
Balance active power；
Step 7: if imbalance power absolute value is less than convergence, correcting the wattful power of adjustable unit and load
Rate, return step 6, otherwise trend restrains, and carries out N-1 using power flow solutions and fault set calculates.
According in step 5, if bulk power grid is divided into N number of region, all interconnection wattful powers in each region and other regions
The sum of rate is the interconnection section in its region, and the interconnection section power for being located at ith zone is pi, interconnection section power meter
Drawing initial value isThe sum of the interconnection section power of all areas is zero known to then:
To the pre- method of calibration of interregional interconnection section power planned value:
Calculate plan initial value summation Δ p:
If Δ p is equal to 0, each interconnection section power plan initial value by verifying in advance:
In formulaThe interconnection section power planned value used for Load flow calculation.
If Δ p is not equal to 0, region interconnection section power plan initially needs to correct, modification method are as follows:
It is found that
According in step 6, basic Load flow calculation is carried out using following generation schedule and the bus load prediction first, always not
Balance power concentrates in balance nodes, if its value is Δ ps。
Each regional imbalance active power are as follows:
In formula, PjkFor the active power of branch jk, jk ∈ LiFor member Tributary's set in the interconnection section of region i.
According in step 7, if balance nodes region is a, when meeting the following conditions:
In formula, ε is convergence, and G is regional ensemble.
Basis at this timeIt is found thatIt is believed that the interconnection section power of region a
Also comply with convergence.
It completes to need full-time check section tidal current Integrated query and full-time check section tidal current Integrated query after user side calculates
Function facilitates participation to calculate each side and checks that alarm and power flow solutions information are checked in comparison.Estimated ginseng when in view of system operation
It is more with user, therefore local and synchronous two kinds of data modes need to be considered in above-mentioned Functional Design, that is, use multiple technologies means
The clear data currently shown of intuitively distinguishing are local computing result or other participation unit calculated results, convenient for users to
Work is analyzed in the comparison for carrying out result.
After collectivity Scheme Design is based on the synchronous acquisition full electric network planning data of local logical data too much, through Security Checking point
The raw result of division is synchronized to remaining using data and participates in realizing multi-user at combined calculation user, and at many levels, strange land is synchronous
Carry out the synchronous security analysis system function of labyrinth bulk power grid.
Large-scale complex electric power networks proposed by the present invention plan trend methods of risk assessment a few days ago, while in view of obtaining
In the case that the planning data obtained is of low quality, system is able to carry out the adaptive Load flow calculation of interconnection according to pre- check results,
The calculated result accuracy for planning trend after adjustment was significantly improved more in the past, can satisfy system functionization requirement.
The bulk power grid synchronous safety nucleus correcting system power grid that orients towards the whole country is verified, all kinds of project basis data numbers being collected into
Amount is big, and transmission link is more, there is the quality fluctuation being difficult to avoid that, the design method considers the data that planning data is likely to occur
It fails to report, falls a little and the problems such as wrong point, automatic identification intelligence amendment can be carried out according to the expert knowledge library strategy specially established, and
The verification journal file that subsequent computing system can recognize is produced, the closed-loop control of whole process data check is realized, effectively avoids
The problems such as because calculating mistake caused by data quality problem.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail referring to above-described embodiment for pipe, it should be understood by those ordinary skilled in the art that: still
It can be with modifications or equivalent substitutions are made to specific embodiments of the invention, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement, are intended to be within the scope of the claims of the invention.
Claims (2)
1. a kind of ultra-large electric power networks synchronous safety nucleus correcting system design method, which is characterized in that the described method includes:
(1) data are collected；
(2) it is verified；
(3) it generates bulk power grid synchronous safety calculation and check data check and handles log；
(4) calculation and check data are verified and is corrected in advance；
(5) it quickly calculates；
The step (5) includes:
I, AC power flow calculates；
II, the uneven active power of calculated equilibrium node；
III, each regional imbalance active power is calculated；
Each regional imbalance active power absolute value is less than convergence, then corrects the active power of adjustable unit and load,
Return step II, otherwise trend restrains, and carries out N-1 using power flow solutions and fault set calculates；
If bulk power grid is divided into N number of region, the sum of each region and all interconnection active power in other regions are its region
Interconnection section, the interconnection section power for being located at ith zone is Pi, interconnection section power plan initial value isThen
The sum of the interconnection section power for knowing all areas is zero:
To the pre- method of calibration of interregional interconnection section power planned value:
Calculate plan initial value summation Δ p:
If Δ p is equal to O, each interconnection section power plan initial value by verifying in advance:
In formulaThe interconnection section power planned value used for Load flow calculation；
If Δ p is not equal to O, region interconnection section power plan initially needs to correct, modification method are as follows:
It is found that
The step (1) includes collecting data needed for the bulk power grid synchronous safety that higher level control centre issues is checked；
The data include transmission cross-section limit, transmission cross-section constituent element, equipment power failure plan, system loading prediction, extension set
Group scheduling plan, bus load prediction He Fen save total seven major class data of exchange plan；
Basic Load flow calculation is carried out using following generation schedule and the bus load prediction first, total imbalance power concentrates on putting down
It weighs on node, if its value is Δ ps；
Each regional imbalance active power are as follows:
In formula, PjkFor the active power of branch jk, jk ∈ LiFor member Tributary's set in the interconnection section of region i；
The step (2) the following steps are included:
A, basic verification rule-based knowledge base is established；
B, complex data verification rule-based knowledge base is established；
C, for the data prediction of shaped form load；
The step a includes whether verification seven kinds of data has reported with whether the content of Various types of data is complete；
The step b includes the data check rule of shaped form and the data check rule of non-shaped form；
Shaped form data include system loading prediction, bus load prediction, tie line plan and machine unit scheduling plan；
The data of non-shaped form include transmission cross-section Quota List, transmission cross-section constituent element table and equipment power failure planning chart；
If balance nodes region is a, when meeting the following conditions:
In formula, ε is convergence, and G is regional ensemble；
Basis at this timeIt is found thatIt is believed that the interconnection section power of region a also accords with
Close convergence.
2. such as a kind of ultra-large electric power networks synchronous safety nucleus correcting system design method that claim 1 is told, feature exists
In told step c includes carrying out data prediction to class of a curve shortage of data and data mutation.
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| CN104218569B (en) * | 2014-08-15 | 2016-02-24 | 国家电网公司 | A kind of evaluation analysis method of large scale electric network security analysis |
| CN104217014A (en) * | 2014-09-22 | 2014-12-17 | 国家电网公司 | Data verification method used for national, regional and provincial integration security check |
| CN107424077B (en) * | 2015-08-27 | 2024-03-26 | 中国电力科学研究院有限公司 | Multi-stage daily power generation plan and synchronous safety check design method for complex power grid |
| CN107834536A (en) * | 2017-09-29 | 2018-03-23 | 广东电力交易中心有限责任公司 | A kind of electric network security and the energy market emulation mode of market economy |
| CN110570020B (en) * | 2019-08-15 | 2023-04-07 | 中国南方电网有限责任公司 | Medium-and-long-term transaction electric quantity safety checking method suitable for regional alternating current-direct current hybrid power grid |
| CN113659579B (en) * | 2021-08-11 | 2022-10-04 | 国网福建省电力有限公司 | N-1 safety constraint considered regional power grid tie line power transmission capability calculation method |
| CN115513952B (en) * | 2022-11-23 | 2023-02-28 | 中国电力科学研究院有限公司 | Safety check method, system, equipment and medium for power generation and utilization of regional power grid |
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