CN108964076A - Regional power grid is idle program evaluation method and system, computer equipment, medium - Google Patents
Regional power grid is idle program evaluation method and system, computer equipment, medium Download PDFInfo
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1871—Methods for planning installation of shunt reactive power compensators
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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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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The present invention provides a kind of idle program evaluation method of regional power grid, comprising: obtains the mode of connection, parameter and the service condition of target area power grid；According to the mode of connection, parameter and service condition, the first index value of the static reactive index of the target area power grid and the second index value of dynamic reactive index are calculated；Using first index value, second index value and respective corresponding preset weights, weighting obtains comprehensive evaluation index value.The present invention is weighted to obtain summation evaluation index value by the index value of idle index, and then can compare assessment to the idle planning of different regional power grids, identifies preferred idle programme.A kind of regional power grid provided by the invention is idle program evaluation system, computer equipment, medium, it may have above-mentioned beneficial effect, details are not described herein.
Description
Technical field
The present invention relates to Electric Power Network Planning technical field, in particular to program evaluation method that a kind of regional power grid is idle and it is
System, computer equipment, medium.
Background technique
Electric Power Network Planning is also known as transmission system planning, based on load prediction and power source planning.Electric Power Network Planning is determined at what
When, where invest to build what type of transmission line of electricity and its feeder number, to reach required ability to transmit electricity in planning horizon, full
Make the expense of transmission system minimum under the premise of sufficient all technical.
Load or burden without work and idle configuration are easy ignored in Electric Power Network Planning: in terms of static reactive configuration, usually according to rule
The percentage of the main transformer capacity of journey specification configures, which configures reactive compensation with simple and convenient, operability
Strong advantage, but the principle does not make more optimal match according to the reactive balance demand of different reactive voltage characteristic power grids
It sets, leads to the compensation of some substations excessively, and the problem that the compensation of some substations is insufficient；Dynamic reactive configuration aspect, it is usually logical
The stabilizing power that simulation calculation simply checks grid plan modification is crossed, not over reasonable analysis, is suitably subject to dynamic reactive support.It is existing
The idle allocation plan having more is the absence of evaluation link, cannot the idle planning of scientific and rational guidance, cause utilization rate of equipment and installations compared with
It is low.
Therefore, a kind of idle program evaluation scheme for power grid how is proposed, the static state that can comprehensively consider power grid is special
Property and dynamic characteristic, carrying out idle assessment to different power network planning scheme compares, and is that those skilled in the art are urgently to be resolved
Technical problem.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of idle program evaluation method and system of regional power grid, calculating
Machine equipment, medium can comprehensively consider the static characteristic and dynamic characteristic of power grid, carry out to different power network planning schemes idle
Assessment is compared.Its concrete scheme is as follows:
In a first aspect, the present invention provides a kind of idle program evaluation method of regional power grid, comprising:
Obtain the mode of connection, parameter and the service condition of target area power grid；
According to the mode of connection, parameter and service condition, the static reactive index of the target area power grid is calculated
Second index value of the first index value and dynamic reactive index；
Using first index value, second index value and respective corresponding preset weights, weighting is integrated
Evaluation index value.
Preferably,
The static reactive index, comprising: reactive loss, layering reactive power exchange, same layer reactive power exchange, comprehensive load or burden without work
Any one in characteristic, reactive balance or more than one combination.
Preferably,
The reactive loss includes: reactive loss amount, reactive loss coefficient；
The layering reactive power exchange includes: layering reactive power exchange amount, layering reactive power exchange coefficient；
The same layer reactive power exchange includes: same layer reactive power exchange amount, same layer reactive power exchange coefficient；
The reactive balance includes: total load or burden without work, idle profit and loss amount, load or burden without work compensation rate.
Preferably,
The dynamic reactive index, comprising: sensitivity, configuration capacity, in risk point any one or it is more than one
Combination.
Preferably,
The sensitivity includes: critical clearing time and/or voltage recovery time；
The configuration capacity includes: minimal configuration total capacity and/or single seat substation is averaged configuration capacity；
The risk point includes: system unstability risk point.
Preferably, described according to the mode of connection, parameter and service condition, calculate the static state of the target area power grid
First index value of idle index and the second index value of dynamic reactive index, comprising:
According to the mode of connection, parameter and the service condition of the target area power grid, electric analog model is built；
Using the electric analog model, Load flow calculation is carried out, the first index value of static reactive index is obtained；
Using the electric analog model, stability Calculation is carried out, the second index value of dynamic reactive index is obtained.
Second aspect, the present invention provide a kind of idle program evaluation system of regional power grid, comprising:
Parameter Conditions obtain module, for obtaining the mode of connection, parameter and service condition of target area power grid；
Index computing module, for calculating the target area power grid according to the mode of connection, parameter and service condition
Static reactive index the first index value and dynamic reactive index the second index value；
Aggregative weighted module, for being preset using first index value, second index value with respectively corresponding
Weight, weighting obtain comprehensive evaluation index value.
Preferably, the index computing module, comprising:
Simulation model builds module, for the mode of connection, parameter and the service condition according to the target area power grid, takes
Build electric analog model；
Static State Index computing module carries out Load flow calculation, obtains static reactive and refer to for utilizing the electric analog model
The first index value of target；
Dynamic indicator computing module carries out stability Calculation, obtains dynamic reactive and refer to for utilizing the electric analog model
The second index value of target.
The third aspect, the present invention provide a kind of computer equipment, comprising:
Memory, for storing computer program；
Processor realizes any of the above-described kind of regional power grid idle program evaluation method when for executing the computer program
The step of.
Fourth aspect, the present invention provide a kind of computer readable storage medium, which is characterized in that described computer-readable to deposit
Be stored with computer program on storage media, the computer program realized when being executed by processor any of the above-described kind of regional power grid without
The step of function program evaluation method.
The present invention provides a kind of idle program evaluation method of regional power grid, comprising: obtains the wiring side of target area power grid
Formula, parameter and service condition；According to the mode of connection, parameter and service condition, the static state of the target area power grid is calculated
First index value of idle index and the second index value of dynamic reactive index；Referred to using first index value, described second
Scale value obtains comprehensive evaluation index value with respective corresponding preset weights, weighting.The index value that the present invention passes through idle index
It is weighted to obtain summation evaluation index value, and then assessment can be compared to the idle planning of different regional power grids, reflect
It Chu not preferred idle programme.
A kind of regional power grid provided by the invention is idle program evaluation system, computer equipment, medium, it may have above-mentioned
Beneficial effect, details are not described herein.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of process of the idle program evaluation method of regional power grid provided by a kind of specific embodiment of the present invention
Figure；
Fig. 2 is that static, dynamic acrobatic skill index method flow diagram is sought provided by a kind of specific embodiment of the present invention；
Fig. 3 is a kind of composition of the idle program evaluation system of regional power grid provided by a kind of specific embodiment of the present invention
Schematic diagram；
Fig. 4 is the composition schematic diagram of index computing module provided by a kind of specific embodiment of the present invention；
Fig. 5 is the structural schematic diagram of computer equipment provided by another specific embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of idle program evaluation of regional power grid provided by a kind of specific embodiment of the present invention
The flow chart of method.
In a kind of specific embodiment of the invention, the embodiment of the present invention provides a kind of idle program evaluation of regional power grid
Method, comprising:
S11: the mode of connection, parameter and the service condition of target area power grid are obtained；
Firstly, it is necessary to the mode of connection of target area power grid be obtained, that is, Topology connection mode, between each connection line
Impedance parameter value and power supply and load service condition, to carry out the calculating of electric system.
S12: according to the mode of connection, parameter and service condition, the static reactive for calculating the target area power grid refers to
Second index value of the first index value of target and dynamic reactive index；
According to the mode of connection, parameter and service condition that top obtains, static reactive index can be calculated and move
State is idle finger target value, wherein static reactive index and dynamic reactive index all include many junior's indexs.
S13: it is obtained using first index value, second index value with respectively corresponding preset weights, weighting
Comprehensive evaluation index value.
The setting of preset weights can be carried out by the way of expert estimation to the first index value, the second index value, in turn
It can use the first index value in step S12, second index value and respective corresponding preset weights, weighting is integrated
Evaluation index value.
In the specific implementation, static reactive index may include: reactive loss, layering reactive power exchange, same layer is idle friendship
It changes, integrate load or burden without work characteristic, any one or more than one combination in reactive balance.It can certainly be according to working as proparea
The emphasis method of operation of domain power grid, one more important index of focal selection carry out the judgement of idle planning.The wherein nothing
Function loss includes: reactive loss amount, reactive loss coefficient；The layering reactive power exchange includes: layering reactive power exchange amount, layering nothing
Function exchange coefficient；The same layer reactive power exchange includes: same layer reactive power exchange amount, same layer reactive power exchange coefficient；The reactive balance
It include: total load or burden without work, idle profit and loss amount, load or burden without work compensation rate.
Dynamic reactive index, may include: sensitivity, configuration capacity, in risk point any one or it is more than one
Combination.Wherein, the sensitivity includes: critical clearing time and/or voltage recovery time；The configuration capacity includes: minimum
Configuration total capacity and/or single seat substation are averaged configuration capacity；The risk point includes: system unstability risk point.
Power grid static reactive in general area of the present invention and dynamic reactive demand, it is trend based on planning region power grid, temporarily steady
It calculates, extracts flow data and transient stability as a result, proposing a set of practicable idle planning integrated evaluating method.Static nothing
Function program evaluation is started with from the angle of load or burden without work characteristic, bases oneself upon the principle of reactive layered subregion in-situ balancing, checks region electricity
Net idle configuration capacity and level；Dynamic reactive program evaluation stabilizes to starting point from safeguards system, is based on Various Complex failure
Type identifies idle dynamic configuration optimal case.
Specifically, the following table 1 can be referred to, table 1 is the index detail list that idle programme integrated evaluating method includes.
The index detail list that the idle programme integrated evaluating method of table 1 includes
The indices of Static State Index (i.e. static reactive index) are explained below:
Static State Index characterizes under Power System Steady-state state, on certain grid structure, the method for operation, equipment component configuration basis
The intrinsic network characteristic of the regional power grid of upper formation.Static aspect first class index have reactive loss, layering reactive power exchange, same layer without
Function exchange, comprehensive load or burden without work characteristic, reactive balance 5；Two-level index 10；Three-level index 25.
Regional power grid reactive loss index and component parameters, rack scale, electric network active have substantial connection, refer to comprising second level
Indicate reactive loss amount and reactive loss coefficient 2；Three-level index has main transformer reactive loss, route reactive loss, unit line
Reactive loss, line charging power, main transformer reactive loss coefficient, route reactive loss coefficient 6.
(1) reactive loss figureofmerit refers to the demand of power grid main element transformer and route in actual operation to idle,
Including 4 main transformer reactive loss, route reactive loss, unit line reactive loss, line charging power three-level indexs.Idle damage
Consumption index meaning and calculating are as follows:
1. main transformer reactive loss QTloss: refer to the reactive loss total amount of certain region 220kV transforming plant main transformer.
2. route reactive loss QLloss: refer to the reactive loss total amount of certain region 220kV equivalent line inductance, if certain
220kV connection is one's respective area and exterior domain Liang Ge 220kV substation, then respectively accounts for half according to each region and take.
3. unit line reactive loss QLperloss: refer to certain region 220kV route reactive loss QLlossWith this city 220kV line
The ratio of road equivalent length L is calculated such as formula (1).
4. line charging power QLC: refer to the reactive loss total amount of certain region 220kV equivalent line capacitance, it is negative to be equivalent to route
Loss respectively accounts for if certain 220kV connection is one's respective area and exterior domain Liang Ge 220kV substation according to each region
Half takes.
(2) reactive loss coefficient index refers to power grid main element transformer and route in actual operation to active transmission
Effect, including 2 main transformer reactive loss coefficient, route reactive loss coefficient three-level indexs.The absolute figureofmerit meaning of reactive loss
And it calculates as follows:
1. main transformer reactive loss factor beta: the city Zhi Mou 220kV main transformer reactive loss total amount QTlossIt is sent under 220kV substation
Burden with power total amount PM+PLRatio, calculate such as formula (2).
2. route reactive loss coefficient gamma: the city Zhi Mou 220kV route reactive loss total amount QLlossIt is sent under 220kV substation
Burden with power total amount PM+PLRatio, calculate such as formula (3).
2, it is layered reactive power exchange
Regional power grid is layered reactive power exchange between idle index characterization neighboring voltage level, support situation, includes second level
Index has layering reactive power exchange amount and layering reactive power exchange coefficient 2；Three-level index has the reactive power exchange amount with 500kV power grid
Q500, in change under send it is idle, be lower down send it is idle, become under send power factor, be lower down and send power factor 5.
(1) layering reactive power exchange figureofmerit refers to the load or burden without work that certain regional power grid 220kV substation conveys to mesolow side
Sent under total amount, including 500kV it is idle, become under send it is idle, be lower down and send idle 3 three-level indexs.Layering reactive power exchange amount refers to
It marks meaning and calculates as follows:
1. the reactive power exchange amount Q with 500kV power grid500: using the 220kV bus of 500kV substation as separation, this city
The 220kV line flows interconnected with 500kV substation cross the idle total amount of separation.When indicating 500kV power grid on the whole for positive value
It is sent under to 220kV power grid idle；It is idle when for negative value, indicating that 220kV power grid is sent to 500kV power grid on the whole.
2. sending idle Q under in becomingTM: the load or burden without work for referring to that certain regional power grid 220kV substation conveys to 110kV power grid is total
Amount.When being sent under expression for positive value；When for negative value, expression is sent.
Idle Q is sent 3. being lower downTL: refer to the nothing that certain regional power grid 220kV substation conveys to 20kV or 10kV medium voltage network
Workload total amount.When being sent under expression for positive value；When for negative value, expression is sent.
(2) what layering reactive power exchange coefficient index referred to that certain regional power grid 220kV substation convey to mesolow side idle bears
Power factor is sent under in lotus total amount and active relationship, including change, is lower down and send power factor 2 three-level indexs.It is layered idle friendship
Commutation is to figureofmerit meaning and calculates as follows:
1. sending power factor under in becomingRefer to the burden with power that certain region 220kV substation conveys to 110kV power grid
Total amount PMWith load or burden without work total amount QMRelationship.PMIt send under being indicated for positive value, is sent for negative value expression.It calculates such as formula (4).
Power factor is sent 2. being lower down220kV substation of the city Zhi Mou conveys active negative to 20kV or 10kV power grid
Lotus total amount PLWith load or burden without work total amount QLRelationship.PLIt send under being indicated for positive value, is sent for negative value expression.It calculates such as formula (5).
3, same layer reactive power exchange
Between the adjacent 220kV regional power grid of regional power grid same layer is idle index characterization, and with the power plant of same voltage class,
Reactive power exchange, support situation between subscriber station, reactive apparatus, have same layer reactive power exchange amount and reactive power exchange comprising two-level index
Coefficient of discharge index 2；Three-level index have with the reactive power exchange amount of outskirt 220kV power grid, with the reactive power exchange amount of 220kV power plant,
With the reactive power exchange amount of 220kV subscriber station and reactive power exchange amount and outskirt the 220kV electricity of 220kV substation low-pressure reactive compensation
The reactive power exchange amount accounting of the reactive power exchange amount accounting of net and the reactive power exchange amount accounting of 220kV power plant and 220kV subscriber station,
With the reactive power exchange amount accounting 8 of 220kV substation low-pressure reactive compensation.
(1) same layer reactive power exchange figureofmerit refers to outskirt power grid and local area of certain regional power grid 220kV with identical voltage class
The power plant in domain, subscriber station, the reactive power exchange amount of reactive apparatus, including the reactive power exchange amount and 220kV with outskirt 220kV power grid
The reactive power exchange amount of power plant, the idle friendship with the reactive power exchange amount of 220kV subscriber station and 220kV substation low-pressure reactive compensation
4 three-level indexs of the amount of changing.Same layer reactive power exchange figureofmerit meaning and calculating are as follows:
1. the reactive power exchange amount Q with outskirt 220kV power gridOutside: using the midpoint of 220kV route as separation, one's respective area with
The 220kV line flows of outer city's interconnection cross the idle total amount of separation.When for positive value, indicating outskirt 220kV power grid on the whole to this
It is sent in the 220kV power grid of region idle；When for negative value, indicating that 220kV power grid in one's respective area sends nothing outside to outskirt 220kV power grid on the whole
Function.
2. the reactive power exchange amount Q with 220kV power plantFactory: using the 220kV bus of 220kV power plant as separation, one's respective area with
The 220kV line flows of 220kV power plant interconnection cross the idle total amount of separation.When for positive value, indicating 220kV power plant on the whole to this
It is sent in the 220kV power grid of region idle；It is idle when for negative value, indicating that 220kV power grid in one's respective area is sent outside to 220kV power plant on the whole.
3. the reactive power exchange amount Q with 220kV subscriber stationWith: using the 220kV bus of 220kV subscriber station as separation, local area
The 220kV line flows of domain and the interconnection of 220kV subscriber station cross the idle total amount of separation.When for positive value, indicating that 220kV subscriber station is whole
It send on body to one's respective area 220kV power grid idle；When for negative value, indicating 220kV power grid in one's respective area on the whole to 220kV subscriber station
Under send it is idle.
4. the reactive power exchange amount Q with 220kV substation low-pressure reactive compensationIt mends: using 220kV substation low-voltage side bus as
Separation, low-pressure reactive compensation flow through the idle total amount of separation.When for positive value, indicating that reactive compensation power output is capacitive；When for
Negative value indicates reactive compensation power output for perception.
(2) reactive power exchange coefficient of discharge index refers to that the same layer reactive power exchange amount of certain regional power grid accounts for the ratio of total load or burden without work amount
Weight, reflects the reactive power support source of regional power grid, including the reactive power exchange coefficient of discharge and 220kV electricity with outskirt 220kV power grid
The reactive power exchange coefficient of discharge of factory, with the reactive power exchange coefficient of discharge of 220kV subscriber station, with 220kV substation low-pressure reactive compensation
4 three-level indexs of reactive power exchange coefficient of discharge.Same layer reactive power exchange figureofmerit meaning and calculating are as follows:
1. the reactive power exchange coefficient of discharge with outskirt 220kV power grid: one's respective area and the reactive power exchange amount of outskirt 220kV power grid account for
The total load or burden without work specific gravity in one's respective area.It calculates such as formula (6).
2. the reactive power exchange coefficient of discharge with 220kV power plant: it is total idle negative to account for one's respective area with the reactive power exchange amount of 220kV power plant
Lotus specific gravity.It calculates such as formula (7).
3. the reactive power exchange coefficient of discharge with 220kV subscriber station: accounting for the total nothing in one's respective area with the reactive power exchange amount of 220kV subscriber station
Workload specific gravity.It calculates such as formula (8).
4. the reactive power exchange coefficient of discharge with 220kV substation low-pressure reactive compensation: with 220kV substation low-pressure reactive compensation
Reactive power exchange amount account for the total load or burden without work specific gravity in one's respective area.It calculates such as formula (9).
4, comprehensive load or burden without work characteristic
Comprehensive load or burden without work characteristic index characterize it is idle with active relationship, comprising two-level index have load or burden without work coefficient and
Reactive load rate 2.
1. load or burden without work COEFFICIENT K: sending idle Q under certain region 220kV substation medium voltage sideM, send idle Q under low-pressure sideL, it is main
Become reactive loss QTloss, route reactive loss QLlossSummation and 220kV substation under the burden with power total amount P that sendM+PLRatio
Value.It calculates such as formula (10).
2. reactive load rate β: to indicate reactive load level.It calculates such as formula (11).
Reactive balance index characterization 220kV regional power grid idle profit and loss situation, comprising two-level index have total load or burden without work,
Idle profit and loss amount and reactive compensation degree 3, three-level index have the idle profit and loss amount of total load or burden without work, route, line become idle profit and loss amount,
Load or burden without work compensativity 4.
(1) the total load or burden without work index characterization in region power grid all load or burden without work total amounts, when total load or burden without work is positive value,
Indicate that 220kV power grid itself is in idle lossing state；When total load or burden without work takes negative value, indicate that 220kV power grid is in itself
Idle surplus state.It calculates such as formula (12).
Qsum=QM+QL+QTloss+QLloss-QLC (12)
(2) idle profit and loss figureofmerit characterizes discrete component to the reactive power contribution of power grid, includes the idle profit and loss amount of route, line
Become 2 three-level indexs of idle profit and loss amount.
1. route is idle profit and loss amount QLΔ: the difference of line charging power and route reactive loss, to indicate the idle of route
Profit and loss state, QLΔBeing positive indicates that route is in idle lossing state, QLΔBeing negative indicates that route is in idle surplus state.It calculates
Such as formula (13).
QLΔ=QLloss-QLC (13)
2. line becomes idle profit and loss amount: route and transformer (referred to as " line change ") idle profit and loss amount QLTΔTo indicate to take no account of
When lower layer's electric network reactive-load demand, the idle profit and loss state of route and transformer, QLTΔBeing positive indicates that line becomes in idle loss shape
State；QLTΔBeing negative indicates that line becomes in idle surplus state.It calculates such as formula (14).
QLTΔ=QLloss+QTloss-ΔQLC (14)
(3) load or burden without work compensativity index characterization power grid all load or burden without work total amounts indicate reactive compensation configuration capacity
With the relationship of total load or burden without work, work as QsumFor timing, QcompTake capacitor configuration capacity；Work as QsumWhen being negative, QcompTake reactance configurations
Capacity.α reflects reactive power compensator to the compensation abundant intensity of total load or burden without work.It calculates such as formula (15).
The indices of dynamic indicator (i.e. dynamic reactive index) are illustrated below:
Dynamic indicator characterizes under grid failure state, receiving and enabling capabilities of the system to different faults.Dynamic level-one refers to
Indicate sensitivity, configuration capacity, system risk point 3, two-level index 5, three-level index 11.
1, sensitivity index characterizes power grid dynamic reactive enabling capabilities, includes critical clearing time, voltage recovery time 2
A two-level index.
(1) after critical clearing time characterizes failure generation, system maintains stable maximum duration, and critical clearing time is got over
It is long, illustrate that the dynamic reactive enabling capabilities of power grid are stronger.It is short comprising route three phase short circuit fault critical clearing time, bus three-phase
2 three-level indexs of road fault extreme mute time.
1. route three phase short circuit fault critical clearing time Tcut.line: after the three phase short circuit fault of phyletic line road, pass through
It controls cut-off device switch off time and guarantees the stable maximum time scale of system；
2. bus three phase short circuit fault critical clearing time Tcut.bus: after bus three phase short circuit fault occurs for system, pass through
It controls cut-off device switch off time and guarantees the stable maximum time scale of system.
(2) after the isolation of voltage recovery time characterization failure, voltage restored to time required for stable state, recovery time
It is shorter, illustrate that the dynamic reactive enabling capabilities of power grid are stronger.Include route three phase short circuit fault voltage recovery time, bus three-phase
2 three-level indexs of short trouble voltage recovery time.
1. route three phase short circuit fault voltage recovery time Trec.line: after the three phase short circuit fault of phyletic line road, from cutting
Except failure to voltage was restored to the time required for stationary value；
2. bus three phase short circuit fault voltage recovery time Trec.bus: after bus three phase short circuit fault occurs for system, from cutting
Except failure to voltage was restored to the time required for stationary value.
2, configuration capacity characterizes power grid dynamic reactive demand, averagely matches comprising minimal configuration total capacity, single seat substation
Set 2 two-level index of capacity.
(1) in the case that minimal configuration total capacity characterization considers dispersed placement, maintenance system stablizes the minimum needed to configure
Total capacity.It is steady to stablize minimal configuration total capacity, three Yongzhong's switch single tripping failure system of route comprising route N-2 failure system
Determine 2 three-level indexs of minimal configuration total capacity.
1. route N-2 failure system stablizes minimal configuration total capacity SN-2: phyletic line route road N-2 failure, and cut off
In the case of still causing system unstability, minimum total capacity that system need to configure, it is ensured that system is stablized；
2. three Yongzhong's switch single tripping failure system of route stablizes minimal configuration total capacity Sshort: phyletic line road three
Yongzhong's switch single tripping failure, and in the case of cutting off and still causing system unstability, minimum total capacity that system need to configure, it is ensured that
System is stablized.
(2) single seat substation be averaged configuration capacity characterization maintenance system stablize need to configure minimum total capacity when single seat become
Power station is averaged configuration capacity.Comprising route N-2 failure system stablize single seat substation be averaged configuration capacity, three Yongzhong of route switch
Single-phase tripping failure system stablizes single seat substation and is averaged 2 three-level indexs of configuration capacity.
The configuration capacity S 1. the stable single seat substation of route N-2 failure system is averagedave.N-2: phyletic line route road N-2
Failure, and in the case of cutting off and still causing system unstability, minimum total capacity that single seat substation need to configure, it is ensured that system is stablized；
The configuration capacity S 2. the stable single seat substation of three Yongzhong's switch single tripping failure system of route is averagedave.short: it is
In the case of three Yongzhong's switch single tripping failure of route occurs for system, and excision still causes system unstability, single seat substation needs to configure
Minimum total capacity, it is ensured that system stablize.
(3) a certain type element number of system unstability is caused in system unstability risk point characterization region.Include route N-2
Failure system unstability risk point, three Yongzhong's switch single tripping failure system unstability risk point of route, direct current are latched failure system
3 three-level indexs of unstability risk point.
1. route N-2 failure system unstability risk point NN-2: system unstability caused by route N-2 failure occurs for regional power grid
Risk point number.
2. three Yongzhong switch single tripping failure system unstability risk point N of routeshort: line route three occurs for regional power grid forever
System unstability risk point number caused by middle switch single tripping failure.
3. direct current is latched failure system unstability risk point NDC: system unstability caused by direct current locking failure occurs for regional power grid
Risk point number.
Referring to FIG. 2, Fig. 2 is to seek static state, dynamic acrobatic skill index provided by a kind of specific embodiment of the present invention
Method flow diagram.
On the basis of above-mentioned specific embodiment, the embodiment of the present invention further, the step S12: according to institute
The mode of connection, parameter and service condition are stated, the first index value of the static reactive index of the target area power grid is calculated and is moved
Second index value of index that state is idle may include:
S121: according to the mode of connection, parameter and the service condition of the target area power grid, electric analog model is built；
S122: utilizing the electric analog model, carries out Load flow calculation, obtains the first index value of static reactive index；
S123: utilizing the electric analog model, carries out stability Calculation, obtains the second index value of dynamic reactive index.
In present embodiment, Load flow calculation and stability Calculation are carried out by the way of electric power policy model, can be adopted
With power system analysis software BPA or other policy softwares such as Based on Power System Analysis Software Package (Power System
Analysis Software Package, PSASP) etc. carry out simulation model foundation.And then it can be with using electric analog model
Easily seek static reactive index and dynamic reactive index.
Specifically, in a specific embodiment, step 1: the base of planning time load, power supply, rack is built in BPA
Plinth data；
Step 2: aggregating the idle configuration capacity of regional power grid 220kV substation low-voltage side, line admittance value；
Step 3: Load flow calculation, export area Power Flow Information include 220kV transformer senior middle school downside active power, idle
Power, voltage, 220kV route both ends active power, reactive power.
Step 4: calculating static reactive index；
Step 5: combing regional power grid static synchronous compensator compensation point and compensation capacity；
Step 6: information is stablized in stability Calculation, export area, includes critical clearing time, voltage recovery time and unstability station
Points；
Step 7: obtaining the idle characteristic of programme and evaluation index.
Step 8: for setup measures weight；
Step 9: index being normalized, the comprehensive index value of different schemes is calculated, determines preferred embodiment.
It is worth noting that specifically be weighted when, due to indices numerical value difference it is very big, if directly into
Row weighting, the weighted average that cannot may really want.In the present embodiment, can by the way of per unit value,
Per unit value calculating is carried out to indices setting reference value, and since the index having is smaller, then shows the idle programme
It is more superior, at this moment, the corresponding per unit value of the index can be carried out with the negative correlativing relation of acrobatic skill programme according to the index
Derivation or the other modes of use, so that the corresponding value of the index is positively correlated with idle programme superiority.And then it can
So that the value for the comprehensive assessment index finally sought is bigger, then corresponding idle programme is more excellent.
It is of course also possible to use mathematical method handles the corresponding value of all indexs, so that these values and idle planning are superior
Property is negatively correlated, then the value for the comprehensive assessment index finally sought is smaller, corresponding idle programme is more excellent.
In the following, illustrating institute of the present invention by taking the big load typical way of a certain summer in planning time of certain city 220kV power grid as an example
The embodiment of providing method.
By BPA Load flow calculation, idle index calculated result is as shown in table 2, has in view of static evaluation and dynamic evaluation
Independence can be assessed respectively.Case is assessed mainly for two kinds of rack schemes below, ordinary circumstance, different rack schemes
Idle Static State Index it is close, herein emphatically evaluation dynamic reactive index.
The two kinds of rack schemes of certain city's the year two thousand twenty of table 2 are idle characteristic and evaluation index calculated result
Note: index weights are only used for the calculating of present case overall target, do not have representativeness.
According to above-mentioned steps, it is 0.42347 that calculating BASE schemes synthesis index, which is 0.49746, CASE schemes synthesis index,.
Therefore, the idle index of BASE scheme is better than CASE scheme, and in terms of dynamic reactive support, BASE scheme is more excellent.
The present invention provides a kind of idle program evaluation method of regional power grid, comprising: obtains the wiring side of target area power grid
Formula, parameter and service condition；According to the mode of connection, parameter and service condition, the static state of the target area power grid is calculated
First index value of idle index and the second index value of dynamic reactive index；Referred to using first index value, described second
Scale value obtains comprehensive evaluation index value with respective corresponding preset weights, weighting.The index value that the present invention passes through idle index
It is weighted to obtain summation evaluation index value, and then assessment can be compared to the idle planning of different regional power grids, reflect
It Chu not preferred idle programme.
Fig. 3, Fig. 4 are please referred to, Fig. 3 is a kind of idle planning of regional power grid provided by a kind of specific embodiment of the present invention
The composition schematic diagram of evaluation system；Fig. 4 is that the composition of index computing module provided by a kind of specific embodiment of the present invention shows
It is intended to.
In a kind of specific embodiment of the invention, the embodiment of the present invention provides a kind of idle program evaluation of regional power grid
System 300, comprising:
Parameter Conditions obtain module 310, for obtaining the mode of connection, parameter and service condition of target area power grid；
Index computing module 320, for calculating the target area according to the mode of connection, parameter and service condition
First index value of the static reactive index of power grid and the second index value of dynamic reactive index；
Aggregative weighted module 330, for using first index value, second index value with it is respective corresponding pre-
If weight, weighting obtains comprehensive evaluation index value.
Preferably, the index computing module 320, comprising:
Simulation model builds module 321, for according to the mode of connection of the target area power grid, parameter and operation item
Part builds electric analog model；
Static State Index computing module 322 carries out Load flow calculation, obtains static nothing for utilizing the electric analog model
First index value of function index；
Dynamic indicator computing module 323 carries out stability Calculation, obtains dynamic nothing for utilizing the electric analog model
Second index value of function index.
Referring to FIG. 5, Fig. 5 is the structural representation of computer equipment provided by another specific embodiment of the invention
Figure.
In another specific embodiment of the invention, the embodiment of the present invention provides a kind of computer equipment, comprising:
Memory, for storing computer program；
Processor realizes the electricity of region described in any of the above-described kind of specific embodiment when for executing the computer program
The step of netting idle program evaluation method.
Below with reference to Fig. 5, it illustrates the structural schematic diagrams for the computer equipment for being suitable for being used to realize the embodiment of the present application.
Computer equipment shown in Fig. 5 is only an example, should not function to the embodiment of the present application and use scope bring it is any
Limitation.
As shown in figure 5, computer system 500 includes processor (CPU) 501, it can be according to being stored in read-only memory
(ROM) it the program in 502 or is executed respectively from the program that storage section 508 is loaded into random access storage device (RAM) 503
Kind movement appropriate and processing.In RAM 503, also it is stored with system 500 and operates required various programs and data.
CPU 501, ROM 502 and RAM 503 are connected with each other by bus 504.Input/output (I/O) interface 503
It is connected to bus 504.
I/O interface 505 is connected to lower component: the importation 506 including keyboard, mouse etc.；It is penetrated including such as cathode
The output par, c 507 of spool (CRT), liquid crystal display (LCD) etc. and loudspeaker etc.；Storage section 508 including hard disk etc.；
And the communications portion 509 of the network interface card including LAN card, modem etc..Communications portion 509 via such as because
The network of spy's net executes communication process.Driver 510 is also connected to I/O interface 507 as needed.Detachable media 511, such as
Disk, CD, magneto-optic disk, semiconductor memory etc. are mounted on as needed on driver 510, in order to read from thereon
Computer program be mounted into storage section 508 as needed.
Particularly, in accordance with an embodiment of the present disclosure, it may be implemented as computer above with reference to the process of flow chart description
Software program.For example, embodiment of the disclosure includes a kind of computer program product comprising be carried on computer-readable medium
On computer program, which includes the program code for method shown in execution flow chart.In such reality
It applies in example, which can be downloaded and installed from network by communications portion 509, and/or from detachable media
511 are mounted.When the computer program is executed by processor (CPU) 501, the above-mentioned function limited in the present processes is executed
Energy.It should be noted that computer-readable medium described herein can be computer-readable signal media or computer
Readable medium either the two any combination.Computer-readable medium for example may be-but not limited to-electricity,
Magnetic, optical, electromagnetic, infrared ray or semiconductor system, device or device, or any above combination.Computer-readable medium
More specific example can include but is not limited to: there is the electrical connection of one or more conducting wires, portable computer diskette, hard
Disk, random access storage device (RAM), read-only memory (ROM), erasable programmable read only memory (EPROM or flash memory), light
Fibre, portable compact disc read-only memory (CD-ROM), light storage device, magnetic memory device or above-mentioned any appropriate
Combination.In this application, it includes or the tangible medium of storage program that the program can be with that computer-readable medium, which can be any,
It is commanded execution system, device or device use or in connection.And in this application, computer-readable signal
Medium may include in a base band or as the data-signal that carrier wave a part is propagated, wherein carrying computer-readable journey
Sequence code.The data-signal of this propagation can take various forms, including but not limited to electromagnetic signal, optical signal or above-mentioned
Any appropriate combination.Computer-readable signal media can also be any computer-readable other than computer-readable medium
Medium, the computer-readable medium can be sent, propagated or transmitted for being used by instruction execution system, device or device
Or program in connection.The program code for including on computer-readable medium can pass with any suitable medium
It is defeated, including but not limited to: wireless, electric wire, optical cable, RF etc. or above-mentioned any appropriate combination.
The calculating of the operation for executing the application can be write with one or more programming languages or combinations thereof
Machine program code, described program design language include object-oriented programming language-such as Java, Smalltalk, C+
+, further include conventional procedural programming language-such as " C " language or similar programming language.Program code can
Fully to execute, partly execute on the user computer on the user computer, be executed as an independent software package,
Part executes on the remote computer or executes on a remote computer or server completely on the user computer for part.
In situations involving remote computers, remote computer can pass through the network of any kind --- including local
Net (LAN) or wide area network (WAN)-are connected to subscriber computer, or, it may be connected to outer computer (such as using because of spy
Service provider is netted to connect by internet).
Flow chart and block diagram in attached drawing are illustrated according to the system of the various embodiments of the application, method and computer journey
The architecture, function and operation in the cards of sequence product.In this regard, each box in flowchart or block diagram can generation
A part of one module, program segment or code of table, a part of the module, program segment or code include one or more use
The executable instruction of the logic function as defined in realizing.It should also be noted that in some implementations as replacements, being marked in box
The function of note can also occur in a different order than that indicated in the drawings.For example, two boxes succeedingly indicated are actually
It can be basically executed in parallel, they can also be executed in the opposite order sometimes, and this depends on the function involved.Also it to infuse
Meaning, the combination of each box in block diagram and or flow chart and the box in block diagram and or flow chart can be with holding
The dedicated hardware based system of functions or operations as defined in row is realized, or can use specialized hardware and computer instruction
Combination realize.
As of the invention again with specific embodiment, the embodiment of the present invention provides a kind of computer readable storage medium institute
It states and is stored with computer program on computer readable storage medium, the computer program realizes above-mentioned when being executed by processor
The step of regional power grid idle program evaluation method in specific embodiment of anticipating.
The computer-readable medium can be included in computer or terminal device described in above-described embodiment；?
It can be individualism, and without in the supplying computer equipment.Above-mentioned computer-readable medium carries one or more
Program, when said one or multiple programs are executed by the computer equipment, so that the computer equipment: obtaining target area
The mode of connection, parameter and the service condition of power grid；According to the mode of connection, parameter and service condition, the target area is calculated
First index value of the static reactive index of domain power grid and the second index value of dynamic reactive index；Utilize first index
Value, second index value and respective corresponding preset weights, weight and obtain comprehensive evaluation index value.And storage above-mentioned is situated between
Matter includes: USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random
Access Memory, RAM), the various media that can store program code such as magnetic or disk.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Above to a kind of idle program evaluation method and system of regional power grid provided by the present invention, computer equipment, Jie
Matter is described in detail, and used herein a specific example illustrates the principle and implementation of the invention, above
The explanation of embodiment is merely used to help understand method and its core concept of the invention；Meanwhile for the general skill of this field
Art personnel, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion this
Description should not be construed as limiting the invention.
Claims (10)
1. a kind of idle program evaluation method of regional power grid characterized by comprising
Obtain the mode of connection, parameter and the service condition of target area power grid；
According to the mode of connection, parameter and service condition, the first of the static reactive index of the target area power grid is calculated
Second index value of index value and dynamic reactive index；
Using first index value, second index value and respective corresponding preset weights, weighting obtains overall merit
Index value.
2. the idle program evaluation method of regional power grid according to claim 1, which is characterized in that
The static reactive index, comprising: reactive loss, layering reactive power exchange, same layer reactive power exchange, comprehensive load or burden without work are special
Any one in property, reactive balance or more than one combination.
3. the idle program evaluation method of regional power grid according to claim 2, which is characterized in that
The reactive loss includes: reactive loss amount, reactive loss coefficient；
The layering reactive power exchange includes: layering reactive power exchange amount, layering reactive power exchange coefficient；
The same layer reactive power exchange includes: same layer reactive power exchange amount, same layer reactive power exchange coefficient；
The reactive balance includes: total load or burden without work, idle profit and loss amount, load or burden without work compensation rate.
4. the idle program evaluation method of regional power grid according to claim 1, which is characterized in that
The dynamic reactive index, comprising: sensitivity, configuration capacity, any one or more than one combination in risk point.
5. the idle program evaluation method of regional power grid according to claim 4, which is characterized in that
The sensitivity includes: critical clearing time and/or voltage recovery time；
The configuration capacity includes: minimal configuration total capacity and/or single seat substation is averaged configuration capacity；
The risk point includes: system unstability risk point.
6. the idle program evaluation method of regional power grid according to any one of claims 1 to 5, which is characterized in that described
According to the mode of connection, parameter and service condition, the first index value of the static reactive index of the target area power grid is calculated
With the second index value of dynamic reactive index, comprising:
According to the mode of connection, parameter and the service condition of the target area power grid, electric analog model is built；
Using the electric analog model, Load flow calculation is carried out, the first index value of static reactive index is obtained；
Using the electric analog model, stability Calculation is carried out, the second index value of dynamic reactive index is obtained.
7. a kind of idle program evaluation system of regional power grid characterized by comprising
Parameter Conditions obtain module, for obtaining the mode of connection, parameter and service condition of target area power grid；
Index computing module, for calculating the quiet of the target area power grid according to the mode of connection, parameter and service condition
First index value of index that state is idle and the second index value of dynamic reactive index；
Aggregative weighted module, for using first index value, second index value with respectively corresponding preset weights,
Weighting obtains comprehensive evaluation index value.
8. the idle program evaluation system of regional power grid according to claim 7, which is characterized in that the index calculates mould
Block, comprising:
Simulation model builds module, for the mode of connection, parameter and the service condition according to the target area power grid, builds electricity
Power simulation model；
Static State Index computing module carries out Load flow calculation, obtains static reactive index for utilizing the electric analog model
First index value；
Dynamic indicator computing module carries out stability Calculation, obtains dynamic reactive index for utilizing the electric analog model
Second index value.
9. a kind of computer equipment characterized by comprising
Memory, for storing computer program；
Processor realizes the idle rule of the regional power grid as described in any one of claim 1 to 6 when for executing the computer program
The step of drawing evaluation method.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Program realizes the idle planning of the regional power grid as described in any one of claim 1 to 6 when the computer program is executed by processor
The step of evaluation method.
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