CN109787243A - A kind of artificial emergency load shedding on-line optimization decision-making technique, system and storage medium - Google Patents
A kind of artificial emergency load shedding on-line optimization decision-making technique, system and storage medium Download PDFInfo
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- CN109787243A CN109787243A CN201811494321.6A CN201811494321A CN109787243A CN 109787243 A CN109787243 A CN 109787243A CN 201811494321 A CN201811494321 A CN 201811494321A CN 109787243 A CN109787243 A CN 109787243A
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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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The invention discloses a kind of artificial emergency load shedding on-line optimization decision-making technique, system and storage mediums, which comprises carries out security evaluation to power grid current operating conditions, obtains safety margin；The case where being unsatisfactory for electric power netting safe running requirement for safety margin calculates the real-time artificial emergency load shedding strategy for meeting security constraint；The case where meeting electric power netting safe running requirement for safety margin, emulate from the forecast failure that device is defendd and carries out security evaluation to power grid quasi-steady running mode after forecast failure to peace；The case where for being unsatisfactory for electric power netting safe running requirement after forecast failure, calculates the artificial emergency load shedding strategy of forecast failure for meeting security constraint.The present invention can eliminate the risk that peace causes power grid to be unsatisfactory for safe and stable operation requirement from device load shedding off-line strategy mismatch or control amount deficiency, reduce artificial emergency load shedding accident risk cost.
Description
Technical field
The present invention relates to a kind of artificial emergency load shedding on-line optimization decision-making technique, system and storage mediums, belong to electric power
Systems technology field.
Background technique
With continuing to increase for the transregional transmission of electricity scale of extra-high voltage alternating current-direct current serial-parallel power grid, extra-high voltage high-capacity direct current is presented more
Enter, high proportion receiving end power grid feature it is increasingly significant, frequency, the trend of voltage support ability and important transmission cross-section of receiving end power grid
Conveying capacity becomes the principal element for influencing electric power netting safe running, in order to solve the frequency of receiving end power grid, electricity after alternating current-direct current failure
Pressure and cross section limit problem, emergency load shedding measure is necessary as one kind, effectively controls resource.
Several typical grid operation modes usually are set with electrical network analysis experience by grid operation mode personnel, are passed through
Safety and stability is carried out to typical grid operation mode offline and calculates analysis, is extracted based on conservatism summary and meets typical case side
Second and third road defence line load shedding control strategy of formula safety and stability, but it is limited to complicated and changeable, the Duo Zhongan of grid operation mode
Full problem interweaves, off-line calculation parameter and actual operation parameters are there are factors such as deviations, second and third road defence line of off-line arrangement subtracts
Load strategy mismatch and the insufficient risk of control amount are increasing, only rely on off-line strategy and second and third level security is defendd to stablize mark
The failure of alignment request still has power grid security risk.In order to make up second and third defence line load shedding strategy mismatch in actual motion
With control amount deficiency problem, usually regulating and controlling personnel, according to accident drawing road tagmeme table, sequentially progress is artificial in batches based on operating experience
Emergency load shedding, but artificial emergency load shedding stimulation optimization lacks effective technical support means, it is difficult to effectively take into account a variety of peaces
The coordinated control of staff cultivation, there is also the problems that load shedding amount accident risk cost is larger.
Summary of the invention
It is an object of the invention to overcome deficiency in the prior art, a kind of artificial emergency load shedding on-line optimization is provided and is determined
Plan method, system and storage medium, can eliminate peace from device load shedding off-line strategy mismatch or control amount deficiency leads to power grid
It is unsatisfactory for the risk of safe and stable operation requirement, reduces artificial emergency load shedding accident risk cost.
In order to achieve the above objectives, the present invention adopts the following technical solutions realization:
In a first aspect, the embodiment of the invention provides a kind of artificial emergency load shedding on-line optimization decision-making technique, the side
Method includes the following steps:
Security evaluation is carried out to power grid current operating conditions, obtains safety margin；
The case where being unsatisfactory for electric power netting safe running requirement for safety margin calculates and meets the real-time artificial tight of security constraint
Anxious load shedding strategy；
The case where meeting electric power netting safe running requirement for safety margin, carries out peace from the forecast failure that device is defendd
It emulates and security evaluation is carried out to power grid quasi-steady running mode after forecast failure；
The case where for being unsatisfactory for electric power netting safe running requirement after forecast failure, calculates the forecast failure for meeting security constraint
Artificial emergency load shedding strategy.
With reference to first aspect, further, the emergency load shedding strategy artificial in real time and/or the forecast failure are artificial
The calculation method of emergency load shedding strategy includes:
Identify that artificial emergency load shedding accident draws the controllable measure space in road；
Filter out the controlling that artificial emergency load shedding accident draws accident drawing road load shedding measure in the controllable measure space in road
Energy cost index is greater than effective controllable measure of setting threshold；
The combination of enumerating that artificial emergency load shedding scheme is carried out to effective controllable measure chooses safety margin and is greater than safety surely
Nargin threshold and the smallest scheme of objective function are determined as artificial emergency load shedding strategy.
With reference to first aspect, further, the expression formula of the objective function is shown below:
In formula, F1Cost is controlled for artificial emergency load shedding；F2For artificial emergency load shedding accident risk cost； PrgFor
Load shedding measure and its controllable burden amount to be solved；Prg.jFor the controllable burden amount of load shedding measure j, Crg.jIt is arranged for load shedding
The cost of j is applied, Ω is that artificial emergency load shedding accident draws the controllable measure space in road, ZkFor k-th of sub-area division load shedding measure
Set, Paz.jTo pacify the load from device load shedding measure j, L1For emergency load shedding measure sum artificial in Optimal Decision-making, Z
Region sum is investigated for load shedding accident risk,For the load total amount of k-th of sub-area division,Table
Show the load shedding ratio of k-th of sub-area division；λkFor the load shedding accident risk work factor of k-th of sub-area division.
With reference to first aspect, further, the artificial emergency load shedding accident draws the identification side in the controllable measure space in road
Method includes:
Artificial emergency load shedding accident, which is established, according to device name draws compareing for road tagmeme table and energy management system
Relation table；
It rejects artificial emergency load shedding accident and draws in road tagmeme table outaged equipment, export effective accident and road is drawn controllably to set
It is standby；
Draw the operation power of road controllable device as controllable burden amount effective accident, generating includes controllable measure and control
The artificial emergency load shedding accident for measuring information draws the controllable measure space in road.
With reference to first aspect, further, the method emulated to the forecast failure includes:
According to current time peace from device off-line strategy model and parameter, peace from device real-time running state and it is current when
It carves equipment and throws/stop state and trend real time information, the peace for obtaining each forecast failure under power grid current operating conditions is lightened the burden from device
Lotus is when value strategy and control parameter；
Data are calculated according to safety on line assessment under power grid current operating conditions, self-chambering is counted and pacified to each forecast failure
Load shedding is set when the time-domain-simulation of value strategy and control parameter.
With reference to first aspect, further, the security evaluation include: voltage security assessments, apparatus overload security evaluation,
Cross section limit security evaluation and steady frequency security evaluation.
With reference to first aspect, further, the emergency load shedding strategy artificial in real time and/or the forecast failure are artificial
Emergency load shedding strategy according to steady frequency safety, apparatus overload safety, cross section limit safety and voltage security order of priority
Optimize calculating.
With reference to first aspect, further, described pacify from device includes: second defence line security control device, three lines of defence
Low-frequency and low-voltage load-reducing device.
Second aspect, the embodiment of the invention provides a kind of artificial emergency load shedding on-line optimization decision system, the systems
System includes:
Security evaluation module: for carrying out security evaluation to power grid current operating conditions, safety margin is obtained；
Computing module: it the case where for being unsatisfactory for electric power netting safe running requirement for safety margin, calculates and meets safety about
The real-time artificial emergency load shedding strategy of beam；
Emulation module: the case where for meeting electric power netting safe running requirement for safety margin, peace is defendd from device
Forecast failure emulated；
The security evaluation module is also used to: carrying out security evaluation to power grid quasi-steady running mode after forecast failure；
The computing module is also used to: the forecast failure for being unsatisfactory for electric power netting safe running requirement, is calculated and is met safety
The artificial emergency load shedding strategy of the forecast failure of constraint.
In conjunction with second aspect, further, the computing module includes:
Identification module: artificial emergency load shedding accident draws the controllable measure space in road for identification；
It establishes module: drawing road tagmeme table and power grid energy pipe for establishing artificial emergency load shedding accident according to device name
The contrast relationship table of reason system；
It rejects module: drawing in road tagmeme table outaged equipment for rejecting artificial emergency load shedding accident, export effective thing
Therefore draw road controllable device；
Generation module: for drawing the operation power of road controllable device as controllable burden amount effective accident, generation includes
The artificial emergency load shedding accident of controllable measure and control amount information draws the controllable measure space in road.
In conjunction with second aspect, further, the emulation module includes:
Obtain module: for according to current time peace from device off-line strategy model and parameter, peace from device real time execution
State and trend real time information are thrown/stopped to state and current time equipment, obtains each forecast failure under power grid current operating conditions
Peace from device load shedding when value strategy and control parameter；
Time-domain-simulation module: for calculating data according to safety on line assessment under power grid current operating conditions, to each anticipation
The time-domain-simulation from device load shedding when value strategy and control parameter is counted and pacified to failure.
The third aspect, the embodiment of the invention also provides a kind of artificial emergency load shedding on-line optimization decision systems, including
Processor and storage medium；
The storage medium is for storing instruction；
The processor is for the step of being operated according to described instruction to execute preceding method.
Fourth aspect, the embodiment of the invention provides a kind of machine readable storage mediums, are stored thereon with computer program,
The step of preceding method is realized when the program is executed by processor.
To sum up, a kind of artificial emergency load shedding on-line optimization decision-making technique, system and storage provided in an embodiment of the present invention
Medium pacifies the adaptability from device off-line strategy for the operating status assessment after power grid current operating conditions or forecast failure,
Assessment peace can not ensure electric power netting safe running when pacifying from device off-line strategy from the safety of the operation of power networks after device action
When, it is arranged by counting and pacifying from the artificial emergency load shedding optimization of the online multiclass security constraint of device action and accident risk cost
It applies, network optimization is adjusted to safe operation state in time, it is ensured that operating status after power grid current operating conditions and forecast failure
Safety；The embodiment of the present invention, which can eliminate peace, leads to power grid not from device load shedding off-line strategy mismatch or control amount deficiency
The risk for meeting safe and stable operation requirement reduces artificial emergency load shedding accident risk cost, pacifies for comprehensive reply from device
Artificial emergency load shedding Optimal Decision-making when off-line strategy mismatch or control amount deficiency provides technical support, is ensureing power grid peace
While row for the national games, the economy of operation of power networks is improved.
Detailed description of the invention
Fig. 1 is a kind of process of the artificial emergency load shedding on-line optimization decision-making technique provided according to embodiments of the present invention
Figure.
Specific embodiment
Artificial emergency load shedding on-line optimization decision-making technique provided in an embodiment of the present invention is primarily based on peace from device reality
The movement measure of power grid load shedding and actuating quantity, are based on power grid in action message statistical distance current operating conditions nearlyr a period of time
The safety margin of real-time traffic information assessment power grid current operating conditions simultaneously identifies artificial emergency load shedding under current operating conditions
Accident draws the controllable measure space in road；Then, the feelings of electric power netting safe running requirement are unsatisfactory for for current operating conditions safety margin
Condition, meter and peace are from the practical load shedding movement measure of device and actuating quantity, with artificial emergency load shedding cost and accident risk cost
The sum of minimum objective optimization calculate the Real-time Emergency load shedding strategy for meeting a variety of security constraints；Pacify for current operating conditions
The case where full nargin meets electric power netting safe running requirement, meter and peace work as value strategy and control parameter from device load shedding, certainly to peace
Each forecast failure that device is defendd carries out emulation check, and is commented safely the quasi-steady running mode after forecast failure
Estimate, the failure subset that safety margin is unsatisfactory for electric power netting safe running requirement is filtered out, for each failure in failure subset, base
Identify that artificial emergency load shedding accident draws the controllable measure space in road, meter and simulation process under forecast failure in quasi-steady running information
Middle peace acts measure and actuating quantity from device load shedding, minimum with artificial emergency load shedding cost and the sum of accident risk cost
Objective optimization calculates the artificial emergency load shedding strategy of forecast failure for meeting a variety of security constraints；Work as finally, providing and meeting power grid
The real-time artificial emergency load shedding strategy that preceding operating status safety margin requires, or operating status is abundant safely after meeting forecast failure
Spend desired artificial emergency load shedding strategy.
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
It should be appreciated that the power grids at different levels for the electric system that the embodiment of the present invention is applicable in are each equipped with the peace control of second defence line
Device and three lines of defence low-frequency and low-voltage load-reducing device.
As shown in Figure 1, artificial emergency load shedding on-line optimization decision-making technique provided by the embodiment of the present invention, including it is as follows
Step:
Step 1: the power grid current time of running is set as t0, by t0The operation of power networks state at moment is denoted as S0, mentioned based on EMS
The current method of operation of the power grid of confession, device model parameter generate safety on line Stability Assessment and calculate data, identify operation of power networks shape
State S0Load shedding accident risk investigates the load total amount of each sub-area division, and the fault set that peace is defendd from device is as safety on line
Evaluate and optimize the initial forecast failure collection F of decision0。
Pacifying from device includes second defence line security control device and three lines of defence low-frequency and low-voltage load-reducing device.
Identify operation of power networks state S0The load total amount that load shedding accident risk investigates each sub-area division refers to based on EMS
The affiliated incidence relation of power grid current loads power information and load and sub-area division is provided, each power grid is calculated using formula (1)
The load total amount of subregion.
In formula,For the load total amount of k-th of sub-area division of current operating conditions, Pl.0It is first of current operating conditions
The load of load equipment.
Step 2: road tagmeme table, identification operation shape are drawn in conjunction with power grid current operational information and artificial emergency load shedding accident
State S0Artificial emergency load shedding accident draws the controllable measure space in road down, is denoted as Ω0, it is based on (t0Peace is real from device in the Δ t) period
Border action message counts load shedding and acts measure Xaz.jAnd actuating quantity Paz.j, by t0Moment artificial emergency load shedding optimisation strategy note
For (Fi, Ai), FiRepresent i-th of failure, AiIt represents accident under i-th of failure and draws the measure of road load shedding Optimal Decision-making and its control
Amount, i=0 represent current operating conditions, by the faulty A of instituteiIt is set to empty set.To operation of power networks state S0Security evaluation is carried out, if
Safety margin is unsatisfactory for operation of power networks requirement, then enters step three, otherwise enter step four.
Identify operation of power networks state S0Artificial emergency load shedding accident draws the controllable measure space in road to include the following steps: down
1) road tagmeme table and power grid EMS operation information are drawn based on artificial emergency load shedding accident, establishes artificial urgent Reduction of Students' Study Load
Lotus accident draws the contrast relationship table of device name and device name in EMS in road tagmeme table, and the power grid provided for EMS is current
Topology information is run, artificial emergency load shedding accident is rejected and draws the equipment stopped transport in road tagmeme table, provide operating status S0Under
Effective accident draws road controllable device Xrg.j；
2) the operation of power networks state S provided based on EMS0Under operation power information, by equipment Xrg.jPower is run as it
Controllable burden amount Prg.j, generate the artificial emergency load shedding accident comprising controllable measure and control amount information and draw the controllable measure in road empty
Between Ω0, i.e. Ω0={ (Xrg.1, Prg.1) ..., (Xrg.j, Prg.j) ..., (Xrg.N, Prg.N), wherein N is operation of power networks state S0
Lower accident draws the controllable measure maximum number in road.
To operation of power networks state S0Carry out security evaluation, including voltage security, apparatus overload, cross section limit and steady frequency
Safety Margin.
Safety margin is unsatisfactory for operation of power networks requirement and refers to Voltage security margin, apparatus overload safety margin, cross section limit
Any nargin is less than accordingly according to the setting of power network safety operation regulation in safety margin and steady frequency safety margin
Security margin threshold usually uniformly sets 5% for security margin threshold.
Step 3: meter and t0Peace acts measure from device load shedding in the Δ t period, with artificial emergency load shedding cost with
The minimum objective function of the sum of accident risk cost calculates Ω by optimization0Inside meet safety under power grid current operating conditions
The real-time artificial emergency load shedding optimisation strategy A of margin requirement0, enter step seven.
Δ t is to pacify from the effective time of device operating distance current operating conditions, value 1h.
The objective function that optimization calculates is embodied as shown in formula (2).
In formula, F1For operation of power networks state S0Artificial emergency load shedding controls cost, F down2For operation of power networks state S0Under subtract
Load accident risk cost, Crg.jFor operation of power networks state S0The cost of lower load shedding measure j, L1For operation of power networks state S0Under
Artificial emergency load shedding measure sum, Z in Optimal Decision-makingkFor k-th of sub-area division load shedding measure set, Z is load shedding thing
Therefore risk investigates region sum, λkFor the load shedding accident risk work factor of k-th of sub-area division.
Wherein,Indicate operation of power networks state S0The load shedding ratio of k-th of sub-area division, λkCertainly
By " disposition of electric power safety accident emergency and regulations of investigating " in plan, the accident wind reached with each sub-area division load shedding ratio
Dangerous grade dynamic change, by " disposition of electric power safety accident emergency and regulations of investigating " sub-area division load shedding accident risk etc.
Grade is special major accident, major accident, compared with one of major break down, ordinary accident and zero defects five classes of examination, λkValue
As shown in formula (3).
According to frequency security, apparatus overload, cross section limit and voltage security in artificial emergency load shedding Study on Decision-making Method for Optimization
The order of priority classification carry out accident of problem draws the optimization of road load shedding strategy, Optimal Decision-making meter for latter safety problem and
For the result of decision of previous safety problem, realize that frequency security, apparatus overload, cross section limit and voltage are pacified by progressive alternate
The coordination of full problem emergency load shedding Optimal Decision-making.
In the artificial emergency load shedding Optimal Decision-making for every a kind of safety problem, it is based on controllable measure space Ω0It is interior
Accident draws the control performance cost index of road load shedding measure, and filtering out control performance cost index can greater than the effective of threshold value
Control measure enumerates combination to effective controllable measure progress emergency load shedding scheme, utilizes cluster Computing Platform on this basis
Each scheme is checked parallel, safety margin is chosen and is greater than threshold value and the smallest scheme of objective function as artificial emergency load shedding
Optimisation strategy.
Step 4, according to t0Moment pacifies from the model and parameter of device off-line strategy, peace from device real-time running state C0With
And t0State and trend real time information are thrown/stopped to moment equipment, identifies operation of power networks state S0Lower F0In the peace of each failure subtract from device
Load enters step five when value strategy and control parameter.
Pacifying from the model and parameter of device off-line strategy refers to peace from device second best plan sketch form and control parameter definite value.
Step 5 is based on operation of power networks state S0Lower safety on line Stability Assessment calculates data, to forecast failure collection F0In it is each
The time-domain-simulation from device load shedding when value strategy and control parameter, the power grid after generating each failure are counted respectively and pacified to failure
Quasi-steady running mode S1, load shedding accident risk investigates the load total amount of each sub-area division after identifying forecast failure, and counts
Peace acts measure X ' from device load sheddingaz.jAnd actuating quantity P 'az.j, to the S of each forecast failure1Security evaluation is carried out, peace is filtered out
Full nargin is unsatisfactory for the failure subset F of electric power netting safe running requirement1If F1Six are not entered step then for empty set, otherwise, into step
Rapid seven.
The load total amount that load shedding accident risk investigates each sub-area division after identification forecast failure refers to based on electric after failure
Net quasi-steady running mode S1The affiliated incidence relation of lower load power information and load and sub-area division is counted using formula (4)
Calculate the load total amount of each sub-area division.
In formula,For power grid quasi-steady running mode S1The load total amount of lower k-th of sub-area division, Pl.1It is quasi- steady for power grid
State method of operation S1The load of lower first of load equipment.
To the power grid quasi-steady running mode S of each forecast failure1Carry out security evaluation, including voltage security assessments, equipment
Overload assessment, cross section limit security evaluation and steady frequency security evaluation.
Safety margin is unsatisfactory for operation of power networks requirement and refers to voltage security, apparatus overload, cross section limit and steady frequency peace
Complete any nargin is less than the security margin threshold value being arranged accordingly according to power network safety operation regulation, usually will peace
Full nargin threshold is uniformly set as 10%.
Step 6, for F1In power grid quasi-steady running mode S after each forecast failure1, it is based on pacifying in time-domain-simulation from device
Load shedding acts measure and actuating quantity, identifies power grid quasi-steady running mode S1Artificial emergency load shedding accident draws road controllably to arrange down
Apply space Ω1, with the minimum objective function of the sum of artificial emergency load shedding cost and accident risk cost, calculated by optimization
Ω1Inside meet power grid quasi-steady running mode S1The artificial emergency load shedding optimisation strategy A that safety margin requires under statei, enter
Step 7.
Identify power grid quasi-steady running mode S1Artificial emergency load shedding accident draws the controllable measure space Ω in road down1Including such as
Lower step:
1) in Ω0On the basis of, based on power grid quasi-steady running mode S under forecast failure1Operation of power networks topology information, is picked
Except artificial emergency load shedding accident draws the equipment stopped transport under forecast failure in road tagmeme table, power grid quasi-steady running side is provided
Formula S1Effective accident draws road controllable device X ' downrg.j；
2) it is based on power grid quasi-steady running mode S1The operation power information of lower equipment, by equipment X 'rg.jRun power conduct
Its controllable burden amount P 'rg.j, generate the artificial emergency load shedding accident comprising controllable measure and control amount information and road drawn controllably to arrange
Apply space Ω1, i.e. Ω1={ (X 'rg.1,P′rg.1) ..., (X 'rg.j,P′rg.j) ..., (X 'rg.M,P′rg.M), wherein M is operation
State S1Lower accident draws the controllable measure maximum number in road.
The objective function that optimization calculates is embodied as shown in formula (5).
In formula, F1For power grid quasi-steady running mode S1Artificial emergency load shedding controls cost, F down2For power grid quasi-steady state fortune
Line mode S1Lower load shedding accident risk cost, C 'rg.jFor power grid quasi-steady running mode S1The cost of lower load shedding measure j, L2
For power grid quasi-steady running mode S1Artificial emergency load shedding measure sum, Z in lower Optimal Decision-makingkIt lightens the burden for k-th of sub-area division
Lotus measure set, Z are that load shedding accident risk investigates region sum, λ 'kFor the load shedding accident risk generation of k-th of sub-area division
The valence factor.
Wherein,Indicate power grid quasi-steady running mode S1K-th sub-area division
Load shedding ratio, λk' " disposition of electric power safety accident emergency and regulations of investigating " are pressed in decision, it lightens the burden with each sub-area division
The accident risk grade dynamic change that lotus ratio reaches, by " disposition of electric power safety accident emergency and regulations of investigating " power grid point
Area's load shedding accident risk grade is special major accident, major accident, compared with major break down, ordinary accident and zero defects five classes of examination
One of, λ 'kValue such as formula (6) shown in.
Power grid quasi-steady running mode S in artificial emergency load shedding Study on Decision-making Method for Optimization after each forecast failure1Under according to
Frequency security, apparatus overload, cross section limit and voltage security problem order of priority classification carry out accident draw road load shedding strategy
Optimization, the Optimal Decision-making meter for latter safety problem and the result of decision for previous safety problem pass through progressive alternate
Realize the coordination of frequency security, apparatus overload, cross section limit and voltage security problem emergency load shedding Optimal Decision-making.
Power grid quasi-steady running mode S after for each forecast failure1Under every a kind of the artificial of safety problem promptly subtract
In load optimal decision, it is based on controllable measure space Ω1Interior accident draws the control performance cost index of road load shedding measure, screening
Control performance cost index is greater than effective controllable measure of threshold value out, on this basis, carries out to effective controllable measure urgent
Load shedding scheme enumerates combination, is checked parallel using cluster Computing Platform to each scheme, chooses safety margin and is greater than threshold value
And optimisation strategy (F of the smallest scheme of objective function as artificial emergency load sheddingi, Ai)。
Step 7 summarizes operating status after the artificial emergency load shedding optimisation strategy of current operating conditions or each forecast failure
Artificial emergency load shedding Optimal Decision-making is as a result, by (Fi, Ai) as meter and pacify excellent online from the artificial emergency load shedding of device action
Change strategy.
To sum up, artificial emergency load shedding on-line optimization decision-making technique provided in an embodiment of the present invention can eliminate peace from device
Off-line strategy mismatch or control amount deficiency cause power grid to be unsatisfactory for the risk of safe and stable operation requirement, reduce emergency load shedding
Accident risk cost promotes the economy of operation of power networks.
The embodiment of the invention also provides a kind of artificial emergency load shedding on-line optimization decision systems, before can be used in execution
The artificial emergency load shedding on-line optimization decision-making technique stated, the system comprises:
Security evaluation module: for carrying out security evaluation to power grid current operating conditions, safety margin is obtained；
Computing module: it the case where for being unsatisfactory for electric power netting safe running requirement for safety margin, calculates and meets safety about
The real-time artificial emergency load shedding strategy of beam；
Emulation module: the case where for meeting electric power netting safe running requirement for safety margin, peace is defendd from device
Forecast failure emulated；
The security evaluation module is also used to: carrying out security evaluation to power grid quasi-steady running mode after forecast failure；
The computing module is also used to: the forecast failure for being unsatisfactory for electric power netting safe running requirement, is calculated and is met safety
The artificial emergency load shedding strategy of the forecast failure of constraint.
Wherein, the computing module includes:
Identification module: artificial emergency load shedding accident draws the controllable measure space in road for identification；
It establishes module: drawing road tagmeme table and power grid energy pipe for establishing artificial emergency load shedding accident according to device name
The contrast relationship table of reason system；
It rejects module: drawing in road tagmeme table outaged equipment for rejecting artificial emergency load shedding accident, export effective thing
Therefore draw road controllable device；
Generation module: for drawing the operation power of road controllable device as controllable burden amount effective accident, generation includes
The artificial emergency load shedding accident of controllable measure and control amount information draws the controllable measure space in road.
The emulation module includes:
Obtain module: for according to current time peace from device off-line strategy model and parameter, peace from device real time execution
State and trend real time information are thrown/stopped to state and current time equipment, obtains each forecast failure under power grid current operating conditions
Peace from device load shedding when value strategy and control parameter；
Time-domain-simulation module: for calculating data according to safety on line assessment under power grid current operating conditions, to each anticipation
The time-domain-simulation from device load shedding when value strategy and control parameter is counted and pacified to failure.
The embodiment of the invention also provides a kind of artificial emergency load shedding on-line optimization decision system, including processor and deposit
Storage media；
The storage medium is for storing instruction；
The processor according to described instruction for being operated to execute aforementioned artificial emergency load shedding on-line optimization and determine
The step of plan method.
The embodiment of the invention provides a kind of machine readable storage mediums, are stored thereon with computer program, the program quilt
The step of processor realizes aforementioned artificial emergency load shedding on-line optimization decision-making technique when executing.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions each in flowchart and/or the block diagram
The combination of process and/or box in process and/or box and flowchart and/or the block diagram.It can provide these computer journeys
Sequence instruct to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices processor with
A machine is generated, so that the instruction generation executed by computer or the processor of other programmable data processing devices is used for
Realize the dress for the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram
It sets.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (13)
1. a kind of artificial emergency load shedding on-line optimization decision-making technique, which is characterized in that described method includes following steps:
Security evaluation is carried out to power grid current operating conditions, obtains safety margin；
The case where being unsatisfactory for electric power netting safe running requirement for safety margin, calculating meet the real-time of security constraint and manually promptly subtract
Load strategy；
The case where meeting electric power netting safe running requirement for safety margin, emulates peace from the forecast failure that device is defendd
And security evaluation is carried out to power grid quasi-steady running mode after forecast failure；
The case where for being unsatisfactory for electric power netting safe running requirement after forecast failure, the forecast failure that calculating meets security constraint are artificial
Emergency load shedding strategy.
2. artificial emergency load shedding on-line optimization decision-making technique according to claim 1, which is characterized in that the real-time people
The calculation method of work emergency load shedding strategy and/or the artificial emergency load shedding strategy of the forecast failure includes:
Identify that artificial emergency load shedding accident draws the controllable measure space in road；
Filter out the control performance generation that artificial emergency load shedding accident draws accident drawing road load shedding measure in the controllable measure space in road
Valence index is greater than effective controllable measure of setting threshold；
The combination of enumerating that artificial emergency load shedding scheme is carried out to effective controllable measure, it is abundant greater than safety and stability to choose safety margin
Threshold and the smallest scheme of objective function are spent as artificial emergency load shedding strategy.
3. artificial emergency load shedding on-line optimization decision-making technique according to claim 2, which is characterized in that the target letter
Several expression formulas are shown below:
In formula, F1Cost is controlled for artificial emergency load shedding；F2For artificial emergency load shedding accident risk cost；PrgIt is to be solved
Load shedding measure and its controllable burden amount；Prg.jFor the controllable burden amount of load shedding measure j, Crg.jFor the generation of load shedding measure j
Valence, Ω are that artificial emergency load shedding accident draws the controllable measure space in road, ZkFor k-th of sub-area division load shedding measure set, Paz.j
To pacify the load from device load shedding measure j, L1For emergency load shedding measure sum artificial in Optimal Decision-making, Z is load shedding
Accident risk investigates region sum,For the load total amount of k-th of sub-area division,Indicate k-th of electricity
The load shedding ratio of net subregion；λkFor the load shedding accident risk work factor of k-th of sub-area division.
4. artificial emergency load shedding on-line optimization decision-making technique according to claim 2, which is characterized in that described artificial tight
Anxious load shedding accident draws the recognition methods in the controllable measure space in road to include:
The contrast relationship that artificial emergency load shedding accident draws road tagmeme table and energy management system is established according to device name
Table；
It rejects artificial emergency load shedding accident and draws in road tagmeme table outaged equipment, export effective accident and draw road controllable device；
It draws the operation power of road controllable device as controllable burden amount effective accident, generates and believe comprising controllable measure and control amount
The artificial emergency load shedding accident of breath draws the controllable measure space in road.
5. artificial emergency load shedding on-line optimization decision-making technique according to claim 1, which is characterized in that the anticipation
The method that failure is emulated includes:
Pacified according to current time from device off-line strategy model and parameter, peace from device real-time running state and current time and is set
Standby to throw/stop state and trend real time information, the peace for obtaining each forecast failure under power grid current operating conditions is worked as from device load shedding
Value strategy and control parameter；
Data are calculated according to safety on line assessment under power grid current operating conditions, each forecast failure is counted and pacified from device subtracts
Time-domain-simulation of the load when value strategy and control parameter.
6. artificial emergency load shedding on-line optimization decision-making technique according to claim 1, which is characterized in that the safety is commented
Estimate includes: voltage security assessments, apparatus overload security evaluation, cross section limit security evaluation and steady frequency security evaluation.
7. artificial emergency load shedding on-line optimization decision-making technique according to claim 6, which is characterized in that the real-time people
Work emergency load shedding strategy and/or the artificial emergency load shedding strategy of the forecast failure are according to steady frequency safety, apparatus overload
The order of priority of safety, cross section limit safety and voltage security optimizes calculating.
8. artificial emergency load shedding on-line optimization decision-making technique according to any one of claims 1 to 7, which is characterized in that
Described pacify from device includes: second defence line security control device, three lines of defence low-frequency and low-voltage load-reducing device.
9. a kind of artificial emergency load shedding on-line optimization decision system, which is characterized in that the system comprises:
Security evaluation module: for carrying out security evaluation to power grid current operating conditions, safety margin is obtained；
Computing module: the case where for being unsatisfactory for electric power netting safe running requirement for safety margin, calculating meets security constraint
Artificial emergency load shedding strategy in real time；
Emulation module: the case where for meeting electric power netting safe running requirement for safety margin, peace is defendd from device pre-
Think that failure is emulated；
The security evaluation module is also used to: carrying out security evaluation to power grid quasi-steady running mode after forecast failure；
The computing module is also used to: the forecast failure for being unsatisfactory for electric power netting safe running requirement, and calculating meets security constraint
The artificial emergency load shedding strategy of forecast failure.
10. artificial emergency load shedding on-line optimization decision system according to claim 9, which is characterized in that the calculating
Module includes:
Identification module: artificial emergency load shedding accident draws the controllable measure space in road for identification；
It establishes module: drawing road tagmeme table and power grid energy management system for establishing artificial emergency load shedding accident according to device name
The contrast relationship table of system；
It rejects module: drawing in road tagmeme table outaged equipment for rejecting artificial emergency load shedding accident, export effective accident and draw
Road controllable device；
Generation module: it for drawing the operation power of road controllable device as controllable burden amount effective accident, generates comprising controllable
The artificial emergency load shedding accident of measure and control amount information draws the controllable measure space in road.
11. artificial emergency load shedding on-line optimization decision system according to claim 9, which is characterized in that the emulation
Module includes:
Obtain module: for according to current time peace from device off-line strategy model and parameter, peace from device real-time running state
And state and trend real time information are thrown/stopped to current time equipment, obtains the peace of each forecast failure under power grid current operating conditions
From device load shedding when value strategy and control parameter；
Time-domain-simulation module: for calculating data according to safety on line assessment under power grid current operating conditions, to each forecast failure
Counted and pacified the time-domain-simulation from device load shedding when value strategy and control parameter.
12. a kind of artificial emergency load shedding on-line optimization decision system, including processor and storage medium；It is characterized in that,
The storage medium is for storing instruction；
The processor is used to be operated according to described instruction to execute any one of according to claim 1~8 the method
Step.
13. machine readable storage medium is stored thereon with computer program, which is characterized in that when the program is executed by processor
The step of realizing any one of claim 1~8 the method.
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