CN106099906B - A kind of power system security stablizes online integrated campaign method - Google Patents
A kind of power system security stablizes online integrated campaign method Download PDFInfo
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- H—ELECTRICITY
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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
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Abstract
The invention discloses a kind of power system securities to stablize integrated campaign method, belongs to power system security stability control techniques field.The present invention in electric system by being in the safety and stability prevention and control on-line decision calculated separately when quasi-steady running for forecast failure collection, safety and stability emergent control on-line pre-decision system for each forecast failure and the safety and stability emergent control Real-time Decision only for electric system actual motion state, whether it is more than criterion of the corresponding definite value as all kinds of control decision validity using the duration between this 3 class control decision targeted Operation of Electric Systems moment and current time, it is preferential in conjunction with safety and stability emergent control Real-time Decision, safety and stability emergent control on-line pre-decision system takes second place, safety and stability prevention and control on-line decision last control decision selection principle determines the control measure for execution, the online integrated campaign stablized for power system security provides a kind of practical and effective method.
Description
Technical field
The invention belongs to power system security stability control techniques fields, and more precisely, the present invention relates to one kind to be applicable in
It is lost in the defence electric system of integrated application online preventive control, online emergent control and Real-time Emergency Control various control means
The method of security and stability.
Background technology
Power system security stablizes the mainly foundation guiding rules of power system safety and stability that integrated campaign means use at present
Planning operation mode is calculated by off-line analysis, auxiliary is steady using the safety on line based on electric system actual motion profile data
Setting analysis technology supports the safe and stable operation of electric system.With a large amount of accesses of intermittence generation of electricity by new energy, electric power city
The implementation of the iterative method and future source of energy internet of field, the operation of the actual operating and Conventional Off-line planning of electric system
The deviation of mode can be increasing.The safety and stability integrated campaign of electric system will be gradually converted into offline to study electric system
Based on operation characteristic and mechanism, arrange supplemented by the method for operation, the electric system based on optimizing scheduling Controlling operation method online
Management and running control model.
Ensure that power system security stable operation seeks to cope with various failures that electric system can suffer from and (or disturbs
It is dynamic), in fact, the failure (or disturbance) that electric system can suffer from is can not be exhausted, it is limited by the limit of current computing capability
System, on-line security and stability analysis can only also be analyzed for a small amount of forecast failure, therefore, it is other without pre- necessarily have some
The failure expected can cause electric system to lose safety and stability after occurring.In addition to this, since on-line security and stability analysis always needs
Certain calculating time is wanted, and during this period of time electric system is likely to have occurred that variation, even if using future is based on
The on-line security and stability analysis of the method for operation, also due to the following method of operation is likely to the following actual method of operation not
Unanimously, the on-line security and stability analysis for forecast failure is caused also to be difficult to ensure the safety after these forecast failures really occur
Stability.In fact, also having since electric power system model and parameter, especially transient state and dynamic security stability Calculation are closely related
Model and parameter with it is actual inconsistent, will also result in on-line security and stability analysis result and the actual deviation of electric system.
In short, not only needing to improve, improving existing on-line security and stability analysis technology, but also design synthesis is wanted to apply for anticipation event
Hinder collection safety and stability prevention and control on-line decision, for each forecast failure safety and stability emergent control on-line pre-decision system and
Only for the defence method of the safety and stability emergent control Real-time Decision of electric system actual motion state, to promote electric system
The validity and practicability of safety and stability integrated campaign.
Invention content
Purpose of the present invention is to：It is online to make up prevention and control on-line decision, emergent control in existing on-line security and stability analysis
Decision-premaking and Real-time Emergency Control decision three be mutually independent, the deficiency of not no overall planning, proposes that one kind can integrate
It is steady that safety is lost using the defence electric system of online preventive control, online emergent control and Real-time Emergency Control various control means
Qualitative method.
The basic principle of the present invention is：The safety and stability problem of all kinds of (second grades) high to requirement of real-time can only be led to
It crosses before forecast failure generation and takes electric system prevention and control or rely on automatic safety device pair after forecast failure generation
Emergent control is taken in electric system, and the safety and stability problem of all kinds of (minute grades) less high to requirement of real-time can then be led to
It crosses timely and effectively management and running control means electric system is implemented to control.Therefore, it defends to wrap by online preventive control
Include automatic safety device defence forecast failure including forecast failure as much as possible occur after it is all kinds of to requirement of real-time
The safety and stability problem of high (second grade), by defending electric system after forecast failure in line emergent control for forecast failure
It is transitioned into the safety and stability problem of existing all kinds of (minute grades) less high to requirement of real-time when quasi-steady state, by being directed to reality
The Real-time Emergency Control of operating status is all kinds of to requirement of real-time less high (minute present in actual motion state to defend
Grade) safety and stability problem, and using between this 3 class control decision targeted Operation of Electric Systems moment and current time
Whether duration is more than criterion of the corresponding definite value as all kinds of control decision validity, is determined in real time in conjunction with safety and stability emergent control
Plan is preferential, safety and stability emergent control on-line pre-decision system takes second place, the control decision that safety and stability prevention and control on-line decision is last
Selection principle determines the control measure for execution, the advantages of can targetedly utilizing different control means, makes up not
With the limitation of control means, the online integrated campaign that power system security is stablized is realized.
Specifically, the present invention specifically uses following technical scheme：
It includes electric system quasi-steady running state recognition, electricity that a kind of power system security, which stablizes online integrated campaign method,
Force system quasi-steady running profile data generates, safety and stability prevention and control on-line decision calculates, safety and stability emergent control exists
Line decision-premaking calculates, safety and stability emergent control Real-time Decision calculates and control decision selection, wherein：
If the electric system quasi-steady running state recognition refers to each busbar frequency in electric system in setting duration Δ t
The fluctuating range of rate is both less than setting value Δ f, then current operating conditions are identified as electric system is in quasi-steady running state,
Otherwise, current operating conditions are identified as electric system and are not at quasi-steady running state；
The electric system quasi-steady running profile data generation refers to working as electric system quasi-steady running state recognition
As a result be electric system when being in quasi-steady running state, first, will current time as electric system quasi-steady running section
T at the time of corresponding to datar, then, Network topology is carried out to electric system current operating conditions, then be directed to each calculating
Node, respectively by each calculate node in (trΔ t) the moment is to trAverage frequency value between moment is as the calculate node
Steady frequency, and using the average value of the steady frequency of all calculate nodes as the steady frequency f of electric systemr, for each
Node is injected, it is respectively that each injection node is active/idle in (trΔ t) the moment is to trAverage value between moment is as the note
The stable state of ingress is active/idle, for each calculate node, respectively by each calculate node voltage in (trΔ t) the moment is extremely
trSteady state voltage of the average value as the calculate node between moment, finally, according to network topology and model and parameter, fr, it is each
The steady state voltage of active/idle and each node of stable state of a injection node generates electric system quasi-steady running profile data, and
It transports the Generator Stable of the generator node including equivalent generator node is the sum of active as electric system quasi-steady state
The sum of generated power output corresponding to row profile data PG.sum.r；
The injection node includes generator node, load bus and reactive apparatus access node, the generator node
Including equivalent generator node, the load bus includes duty value node；
Safety and stability prevention and control on-line decision calculating refers to when electric system is in quasi-steady running state and most
T corresponding to newly-generated electric system quasi-steady running profile datarWhen duration between current time is less than Δ t, note
Defence in need forecast failure collection be F, examined based on the electric system quasi-steady running profile data being newly generated for F
Consider protection, pacify the Controlling model and parameter from device and AGC/AVC, to meet electric system after each forecast failure generation in F
Transient safe and stable, dynamic security can be kept stable and static security stabilization optimizes decision calculating, if in safety and stability
Electric system is not at quasi-steady running state in prevention and control on-line decision calculating process, then stops safety and stability prevention and control
On-line decision calculates；
Safety and stability emergent control on-line pre-decision system calculating refer to when electric system be in quasi-steady running state and
The t corresponding to electric system quasi-steady running profile data being newly generatedrWhen duration between current time is less than Δ t,
For each forecast failure in F, it is based respectively on the electric system quasi-steady running profile data being newly generated, it is corresponding to meet
Electric system can keep transmission cross-section active out-of-limit when being transitioned into quasi-steady state after transient state and dynamic process under forecast failure
Safety, apparatus overload safety, the out-of-limit safety of busbar voltage and the out-of-limit safety of mains frequency optimize decision calculating, if in safety
Stablize electric system in emergent control on-line pre-decision system calculating process and be not at quasi-steady running state, then it is tight to stop safety and stability
Anxious control on-line pre-decision system calculates；
Safety and stability emergent control Real-time Decision calculating refers to when electric system is in quasi-steady running state and most
T corresponding to newly-generated electric system quasi-steady running profile datarWhen duration between current time is less than Δ t, base
In the electric system quasi-steady running profile data being newly generated, transmission cross-section can be kept active out-of-limit to meet electric system
Safety, apparatus overload safety, the out-of-limit safety of busbar voltage and the out-of-limit safety of mains frequency optimize decision calculating, if in safety
Stablize electric system in emergent control Real-time Decision calculating process and be not at quasi-steady running state, then it is urgent to stop safety and stability
Real-time Decision is controlled to calculate；
The control decision selection includes the following steps：
If 1) have control measure and electric system in the newest result of decision that safety and stability emergent control Real-time Decision calculates
The electric system that the newest result of decision that the current time of running calculates with safety and stability emergent control Real-time Decision is based on is accurate steady
State runs the t corresponding to profile datarBetween duration be less than setting value Δ t1, then by safety and stability emergent control Real-time Decision
The newest result of decision calculated terminates the selection of this control decision, otherwise, enters step as the control decision for execution
2)；
If 2) in F some forecast failure generation moment tfThis in being calculated with safety and stability emergent control on-line pre-decision system is pre-
Think the t corresponding to electric system quasi-steady running profile data that the newest result of decision of failure is based onrBetween duration it is small
In setting value Δ t2And trEarlier than tf, then the newest of the forecast failure is determined in calculating safety and stability emergent control on-line pre-decision system
Plan result terminates the selection of this control decision, otherwise, enters step 3) as the control decision for execution；
If 3) the newest result of decision that the electric system current time of running calculates with safety and stability prevention and control on-line decision
The t corresponding to electric system quasi-steady running profile data being based onrBetween duration be less than setting value Δ t3, then will be safe
Stablize the newest result of decision of prevention and control on-line decision calculating as the control decision for execution, terminates this control decision
Selection terminate the selection of this control decision otherwise it is assumed that control measure need not be taken to electric system；
The electric system quasi-steady running state recognition, electric system quasi-steady running profile data generate, safety is steady
Determine the calculating of prevention and control on-line decision, safety and stability emergent control on-line pre-decision system calculates, safety and stability emergent control is determined in real time
Plan calculates and the pattern independent operating that cycle executes is pressed in control decision selection respectively in the operational process of electric system.Into one
Step, the safety and stability emergent control on-line pre-decision system calculate, and for each forecast failure in F, carry out following steps respectively
It calculates：
A-1 it) based on the electric system quasi-steady running profile data being newly generated, accounts for protecting for forecast failure
Shield, peace arrive each calculate node frequency dynamic mistake from the time-domain-simulation of device and AGC/AVC Controlling models and parameter until emulating
When the difference of adjacent maximum and minimum is both less than setting value Δ f in journey, time-domain-simulation is terminated, each calculate node is obtained
Dynamic process of frequency, each injection active/idle dynamic process of node, the active dynamic process of each transmission facility and each
The voltage dynamic process of calculate node, enters step A-2)；
The transmission facility includes line and transformer；
A-2 it) is directed to each calculate node, the maximum before each calculate node dynamic process of frequency terminates will be calculated respectively
With the average value of both minimums as the steady frequency for considering the calculate node after forecast failure, then by all calculate nodes
Steady frequency f of the average value of steady frequency as electric system after consideration forecast failuree；For each injection node, respectively
Using each injection node it is active/idle dynamic process terminate before maximum and both minimums average value as consideration anticipation
The stable state of the injection node is active/idle after failure, and by the power generation of the generator node including equivalent generator node
Machine stable state is the sum of active to be denoted as PG.sum.e；For each transmission facility, the active dynamic process of each transmission facility is terminated respectively
The average value of preceding maximum and both minimums is active as the stable state of the transmission facility after consideration forecast failure, then for each
A passway for transmitting electricity for safety and stability monitoring is made the stable state of all transmission facilities in each passway for transmitting electricity is the sum of active respectively
Stable state for the passway for transmitting electricity after consideration forecast failure is active；For each calculate node, respectively by each calculate node voltage
Dynamic process terminate before maximum and both minimums average value as consider forecast failure after the calculate node stable state
Voltage enters step A-3)；
A-3) according to the electric system after stable state is active/idle and forecast failure for considering each injection node after forecast failure
Network topology and model and parameter, establish the power flow equation of electric system, enter step A-4)；
A-4) the majorized function indicated by solution formula (1) is calculated for the electric system quasi-steady state being newly generated
Run the t corresponding to profile datarThe safety and stability emergent control on-line pre-decision system of the moment forecast failure：
In formula (1), I is pre-set generated power in generator node including equivalent generator node
The sum of controllable node, CG.i、ΔPG.iThe generator unit active power adjustment cost of respectively i-th generated power controllable node
With generated power variable quantity, J is pre-set load controllable node in load bus including duty value node
Sum, CL.j、ΔPL.jThe unit demand active power adjustment cost of respectively j-th load controllable node and the active variation of load
Amount, PG.i.0.e、PG.i.max.e、PG.i.min.eThe Generator Stable of i-th of generated power controllable node respectively after forecast failure
Active, the active duration Δ t in setting of Generator StablecThe upper limit and Generator Stable in interior controllable section are active in Δ tcIt is interior can
Control the lower limit in section, PL.j.0.e、PL.j.min.eRespectively after forecast failure the load stable state of j-th of load controllable node it is active and
Load stable state is active in Δ tcThe lower limit in interior controllable section, K are the transmission facility number in power grid, Pk.0.eFor kth after forecast failure
The stable state of a transmission facility is active, Pk.LMTFor the active limit of stable state of k-th of transmission facility, sk.G.i.eTo be based on step A-3) tide
The active sensitivity of k-th of transmission facility of generated power pair of calculated i-th of generated power controllable node of flow equation,
sk.L.j.eTo be based on step A-3) load of calculated j-th of load controllable node of power flow equation is active is set to k-th of transmission of electricity
The sensitivity of work(is had, M is the passway for transmitting electricity number monitored for safety and stability, NmFor m-th for the defeated of safety and stability monitoring
Transmission facility number in electric channel, Pm.0.e、Pm.LMT.e、P'm.LMT.eIt is monitored for safety and stability for m-th respectively after forecast failure
Passway for transmitting electricity stable state is active, forward security stability limitation and reversed safety and stability limit, sm.n.G.i.eTo be based on step A-3)
M-th of the generated power pair of calculated i-th of generated power controllable node of power flow equation is for safety and stability monitoring
The active sensitivity of n-th of transmission facility, s in passway for transmitting electricitym.n.L.i.eTo be based on step A-3) the calculated jth of power flow equation
The load of a load controllable node is active active to n-th of transmission facility in m-th of passway for transmitting electricity for safety and stability monitoring
Sensitivity, PG.sum.r、frRespectively with the P corresponding to the electric system quasi-steady running profile data that is newly generatedG.sum.rWith
fr, fcr.low、fcr.upThe respectively lower and upper limit of Power System Steady-state frequency out-of-limit safety, λ are to consider emulation and practical dynamic process
The parameter for having differences and setting, X are pre-set idle controllable node number, Qx.0.e、ΔQx、Qx.min.e、Qx.max.eRespectively
The stable state of the reactive apparatus of x-th of idle controllable node is idle after forecast failure, stable state idle work variable quantity, stable state is idle minimum value
With the idle maximum value of stable state, B is the number of nodes in power grid, Vb.0.e、Vb.low.e、Vb.up.eB-th of node respectively after forecast failure
Steady state voltage, steady state voltage lower limit and the steady state voltage upper limit, svq.b.x.eTo be based on step A-3) the calculated xth of power flow equation
The idle sensitivity to b-th of node voltage of the reactive apparatus of a idle controllable node；
The active limit of stable state of the transmission facility refers to overload current limit and rated voltage according to transmission facility, is pressed
The stable state that specified power factor calculates is active.
Further, include the following steps for the calculating of safety and stability emergent control Real-time Decision：
B-1) according to the electric system quasi-steady running profile data being newly generated, the power flow equation of electric system is established,
Enter step B-2)；
2) majorized function indicated by solution formula (2) is calculated for the electric system quasi-steady state fortune being newly generated
T corresponding to row profile datarThe safety and stability emergent control Real-time Decision of moment electric system：
In formula (2), I is pre-set generated power in generator node including equivalent generator node
The sum of controllable node, CG.i、ΔPG.iThe generator unit active power adjustment cost of respectively i-th generated power controllable node
With generated power variable quantity, J is pre-set load controllable node in load bus including duty value node
Sum, CL.j、ΔPL.jThe unit demand active power adjustment cost of respectively j-th load controllable node and the active variation of load
Amount, PG.i.0、PG.i.max、PG.i.minThe Generator Stable of respectively i-th generated power controllable node is active, Generator Stable
It is active in Δ tcThe upper limit and Generator Stable in interior controllable section are active in Δ tcThe lower limit in interior controllable section, PL.j.0、PL.j.minPoint
Not Wei j-th of load controllable node load stable state is active and load stable state is active in Δ tcThe lower limit in interior controllable section, K are electricity
Transmission facility number in net, Pk.0Stable state for k-th of transmission facility is active, Pk.LMTFor the active limit of stable state of k-th of transmission facility
Volume, sk.G.iTo be based on step B-1) generated power of calculated i-th of generated power controllable node of power flow equation is to kth
The active sensitivity of a transmission facility, sk.L.jTo be based on step B-1) calculated j-th of load controllable node of power flow equation
The active sensitivity active to k-th of transmission facility of load, M are the passway for transmitting electricity number monitored for safety and stability, NmIt is m-th
For the transmission facility number in the passway for transmitting electricity of safety and stability monitoring, Pm.0、Pm.LMT、P'm.LMTRespectively m-th steady for safety
Surely the stable state of the passway for transmitting electricity monitored is active, forward security stability limitation and reversed safety and stability limit, sm.n.G.iTo be based on walking
Rapid B-1) m-th of the generated power pair of calculated i-th of generated power controllable node of power flow equation is used for safety and stability
The active sensitivity of n-th of transmission facility, s in the passway for transmitting electricity of monitoringm.n.L.iTo be based on step B-1) power flow equation calculates
J-th of load controllable node load it is active to m-th for safety and stability monitoring passway for transmitting electricity in n-th of transmission facility
Active sensitivity, PG.sum.r、frRespectively with corresponding to the electric system quasi-steady running profile data that is newly generated
PG.sum.rAnd fr, PG.sum.r.0、fr.0Corresponding to the electric system quasi-steady running profile data respectively generated with previous time
PG.sum.rAnd fr, fcr.low、fcr.upThe respectively lower and upper limit of Power System Steady-state frequency out-of-limit safety, X are pre-set idle
Controllable node number, Qx.0、ΔQx、Qx.min、Qx.maxThe stable state of the reactive apparatus of respectively x-th idle controllable node is idle, stable state
Minimum value that idle work variable quantity, stable state are idle and the idle maximum value of stable state, B are the number of nodes in power grid, Vb.0、Vb.low、Vb.upRespectively
For the steady state voltage, steady state voltage lower limit and the steady state voltage upper limit of b-th of node, svq.b.xTo be based on step B-1) power flow equation
The idle sensitivity to b-th of node voltage of the reactive apparatus of calculated x-th of idle controllable node.
By using above-mentioned technical proposal, the present invention achieves following technique effects：
Consider in prevention and control on-line decision as more as possible including the forecast failure that automatic safety device is defendd
Forecast failure occur after all kinds of (seconds grades) high to requirement of real-time safety and stability problem, by the way that it occurs in forecast failure
It is preceding just to take control, can largely avoid due to the control strategy of automatic safety device is unreasonable existing for it is all kinds of right
The safety and stability hidden danger of requirement of real-time high (second grade).By defending forecast failure for the online emergent control of forecast failure
Electric system is transitioned into the safety and stability problem of existing all kinds of (minute grades) less high to requirement of real-time when quasi-steady state afterwards, can
To be supported to provide targetedly control decision immediately after forecast failure generation, the expansion of safety and stability problem is blocked in time.
It is defendd by the Real-time Emergency Control for actual motion state all kinds of to requirement of real-time present in actual motion state
The safety and stability problem of less high (minute grade), can overcome because for electric power after the time-domain-simulation and forecast failure of forecast failure
Emergent control on-line pre-decision system caused by deviation between running state is unreasonable, and makes up because actually occurring
The deficiency of emergent control on-line pre-decision system is not considered and lacked to failure in advance.
Using the duration between this 3 class control decision targeted Operation of Electric Systems moment and current time whether be more than
Corresponding criterion of the definite value as all kinds of control decision validity, safety preferential in conjunction with safety and stability emergent control Real-time Decision
Stablize the control decision selection principle that emergent control on-line pre-decision system takes second place, safety and stability prevention and control on-line decision is last to come really
The advantages of determining the control measure for execution, can targetedly utilizing different control means, makes up different control means
Limitation realizes the online integrated campaign that power system security is stablized.
Description of the drawings
Fig. 1 is the stream that the safety and stability emergent control on-line pre-decision system in the method for the present invention for some forecast failure calculates
Cheng Tu.
Fig. 2 is the flow chart calculated for safety and stability emergent control Real-time Decision in the method for the present invention.
Fig. 3 is the flow chart that control decision selects in the method for the present invention.
Specific implementation mode
Invention is further described in detail with reference to the accompanying drawings and examples.
A kind of power system security of the present embodiment stablizes online integrated campaign method, including electric system quasi-steady running
State recognition, electric system quasi-steady running profile data generate, safety and stability prevention and control on-line decision calculates, safety and stability
Emergent control on-line pre-decision system calculates, safety and stability emergent control Real-time Decision calculates and control decision selection, wherein：
If the electric system quasi-steady running state recognition refers to the electricity in setting duration Δ t (being usually arranged as 10s)
The fluctuating range of each busbar frequency is both less than setting value Δ f (being usually arranged as 0.02Hz) in Force system, then will currently run shape
State is identified as electric system and is in quasi-steady running state, otherwise, current operating conditions is identified as electric system and are not at standard
Steady-state operating condition；
The electric system quasi-steady running profile data generation refers to working as electric system quasi-steady running state recognition knot
Fruit is electric system when being in quasi-steady running state, first, will current time as electric system quasi-steady running section number
According to it is corresponding at the time of tr, then, Network topology is carried out to electric system current operating conditions, then save for each calculating
Point, respectively by each calculate node in (trΔ t) the moment is to trAverage frequency value between moment is as the steady of the calculate node
State frequency, and using the average value of the steady frequency of all calculate nodes as the steady frequency f of electric systemr, for each note
Ingress, it is respectively that each injection node is active/idle in (trΔ t) the moment is to trAverage value between moment is as the injection
The stable state of node is active/idle, for each calculate node, respectively by each calculate node voltage in (trΔ t) the moment is to tr
Steady state voltage of the average value as the calculate node between moment, finally, according to network topology and model and parameter, fr, it is each
The steady state voltage of active/idle and each node of stable state of a injection node generates electric system quasi-steady running profile data, and
It transports the Generator Stable of the generator node including equivalent generator node is the sum of active as electric system quasi-steady state
The sum of generated power output corresponding to row profile data PG.sum.r；
The injection node includes generator node, load bus and reactive apparatus access node, the generator node
Including equivalent generator node, the load bus includes duty value node；
Safety and stability prevention and control on-line decision calculating refers to when electric system is in quasi-steady running state and most
T corresponding to newly-generated electric system quasi-steady running profile datarWhen duration between current time is less than Δ t, note
Defence in need forecast failure collection be F, examined based on the electric system quasi-steady running profile data being newly generated for F
Consider protection, pacify the Controlling model and parameter from device and AGC/AVC, to meet electric system after each forecast failure generation in F
Transient safe and stable, dynamic security can be kept stable and static security stabilization optimizes decision calculating, if in safety and stability
Electric system is not at quasi-steady running state in prevention and control on-line decision calculating process, then stops safety and stability prevention and control
On-line decision calculates；
It wherein, can be by the way that different safety and stability threshold values be arranged to distinguish to real-time for static security scleronomic constraint
It is required that high (second grade) static security stable problem (such as heavy overload) and the static peace to requirement of real time less high (minute grade)
Full stable problem (such as slight overload), the calculating of safety and stability prevention and control on-line decision could be provided as only ensureing transient security
Stablize, dynamic security is stable and stablizes to the high static security of requirement of real-time, may be alternatively provided as transient safe and stable to be ensured,
Dynamic security is stable and stablizes to the less high static security of requirement of real-time；
Safety and stability emergent control on-line pre-decision system calculating refer to when electric system be in quasi-steady running state and
The t corresponding to electric system quasi-steady running profile data being newly generatedrWhen duration between current time is less than Δ t,
For each forecast failure in F, it is based respectively on the electric system quasi-steady running profile data being newly generated, it is corresponding to meet
Electric system can keep transmission cross-section active out-of-limit when being transitioned into quasi-steady state after transient state and dynamic process under forecast failure
Safety, apparatus overload safety, the out-of-limit safety of busbar voltage and the out-of-limit safety of mains frequency optimize decision calculating, if in safety
Stablize electric system in emergent control on-line pre-decision system calculating process and be not at quasi-steady running state, then it is tight to stop safety and stability
Anxious control on-line pre-decision system calculates；
It is as shown in Figure 1 for the safety and stability emergent control on-line pre-decision system calculation process of some forecast failure in F.
Fig. 1 steps 1：Based on the electric system quasi-steady running profile data being newly generated, examined for forecast failure
Consider protection, pacify the time-domain-simulation from device and AGC/AVC Controlling models and parameter, until emulation is dynamic to each calculate node frequency
When the difference of adjacent maximum and minimum is both less than setting value Δ f during state, time-domain-simulation is terminated, obtains each calculating section
The dynamic process of frequency of point, each injection active/idle dynamic process of node, each transmission facility active dynamic process and
2) the voltage dynamic process of each calculate node, enters step；
The transmission facility includes line and transformer；
Fig. 1 steps 2：It is very big before respectively terminating each calculate node dynamic process of frequency for each calculate node
Steady frequency of the average value of value and both minimums as the calculate node after consideration forecast failure, then by all calculate nodes
Steady frequency average value as consider forecast failure after electric system steady frequency fe；For each injection node, divide
Not using each injection node it is active/idle dynamic process terminate before maximum and both minimums average value as consideration in advance
Think that the stable state of the injection node after failure is active/idle, and by the hair of the generator node including equivalent generator node
Motor stable state is the sum of active to be denoted as PG.sum.e；For each transmission facility, respectively by the active dynamic process knot of each transmission facility
The average value of maximum and both minimums before beam is active as the stable state of the transmission facility after consideration forecast failure, then is directed to
Each passway for transmitting electricity for safety and stability monitoring, it is respectively that the stable state of all transmission facilities in each passway for transmitting electricity is the sum of active
Stable state as the passway for transmitting electricity after consideration forecast failure is active；For each calculate node, respectively by each calculate node electricity
Pressure dynamic process terminate before maximum and both minimums average value as after consideration forecast failure the calculate node it is steady
3) state voltage, enters step；
Fig. 1 steps 3：According to the electricity after stable state is active/idle and forecast failure for considering each injection node after forecast failure
The network topology and model and parameter of Force system, establish the power flow equation of electric system, enter step 4)；
Fig. 1 steps 4：The majorized function indicated by solution formula (1) calculates accurate for the electric system being newly generated
T corresponding to steady-state operation profile datarThe safety and stability emergent control on-line pre-decision system of the moment forecast failure.
In formula (1), I is pre-set generated power in generator node including equivalent generator node
The sum of controllable node, CG.i、ΔPG.iThe generator unit active power adjustment cost of respectively i-th generated power controllable node
With generated power variable quantity, J is pre-set load controllable node in load bus including duty value node
Sum, CL.j、ΔPL.jThe unit demand active power adjustment cost of respectively j-th load controllable node and the active variation of load
Amount, PG.i.0.e、PG.i.max.e、PG.i.min.eThe Generator Stable of i-th of generated power controllable node respectively after forecast failure
Active, the active duration Δ t in setting of Generator StablecThe upper limit and generator in controllable section in (being usually arranged as 3 minutes)
Stable state is active in Δ tcThe lower limit in interior controllable section, PL.j.0.e、PL.j.min.eJ-th of load controllable node respectively after forecast failure
Load stable state is active and load stable state is active in Δ tcThe lower limit in interior controllable section, K are the transmission facility number in power grid, Pk.0.e
Stable state for k-th of transmission facility after forecast failure is active, Pk.LMTFor the active limit of stable state of k-th of transmission facility, sk.G.i.e
K-th of transmission of electricity of generated power pair to be based on calculated i-th of generated power controllable node of step 3) power flow equation is set
Have the sensitivity of work(, sk.L.j.eIt is active for the load that is based on calculated j-th of load controllable node of step 3) power flow equation
The sensitivity active to k-th of transmission facility, M are the passway for transmitting electricity number monitored for safety and stability, NmFor m-th for safety
Stablize the transmission facility number in the passway for transmitting electricity of monitoring, Pm.0.e、Pm.LMT.eP'm.LMT.eIt is used for for m-th respectively after forecast failure
The passway for transmitting electricity of safety and stability monitoring stable state is active, forward security stability limitation and reversed safety and stability limit, sm.n.G.i.eFor
M-th of the generated power pair based on calculated i-th of generated power controllable node of step 3) power flow equation is for safety
Stablize the sensitivity that n-th of transmission facility is active in the passway for transmitting electricity of monitoring, sm.n.L.i.eIt is calculated to be based on step 3) power flow equation
The load of j-th of the load controllable node gone out is active to set n-th of transmission of electricity in m-th of passway for transmitting electricity for safety and stability monitoring
Have the sensitivity of work(, PG.sum.r、frRespectively with corresponding to the electric system quasi-steady running profile data that is newly generated
PG.sum.rAnd fr, fcr.low、fcr.upThe respectively lower and upper limit of Power System Steady-state frequency out-of-limit safety, λ are to consider emulation and reality
Dynamic process have differences and the parameter that sets (analysis that high-power miss fault can occur recently according to power grid calculates
It arrives, it is assumed that the difference that power grid actual frequency when quasi-steady state and actual frequency before failure are transitioned into after failure is a, for the big work(
The power grid quasi-steady state frequency that the emulation of rate miss fault obtains and the frequency difference of actual frequency before failure are b, then λ is usually arranged as a/
B), X is pre-set idle controllable node number, Qx.0.e、ΔQx、Qx.min.e、Qx.max.eX-th of nothing respectively after forecast failure
The stable state of the reactive apparatus of work(controllable node is idle, stable state idle work variable quantity, stable state is idle minimum value and the idle maximum value of stable state,
B is the number of nodes in power grid, Vb.0.e、Vb.low.e、Vb.up.eThe steady state voltage of b-th of node, stable state electricity respectively after forecast failure
Pressure limit and the steady state voltage upper limit, svq.b.x.eTo be based on the nothing of calculated x-th idle controllable node of step 3) power flow equation
The idle sensitivity to b-th of node voltage of work(equipment；
The active limit of stable state of the transmission facility refers to overload current limit and rated voltage according to transmission facility, is pressed
The stable state that specified power factor calculates is active.
Safety and stability emergent control Real-time Decision calculating refers to when electric system is in quasi-steady running state and most
T corresponding to newly-generated electric system quasi-steady running profile datarWhen duration between current time is less than Δ t, base
In the electric system quasi-steady running profile data being newly generated, transmission cross-section can be kept active out-of-limit to meet electric system
Safety, apparatus overload safety, the out-of-limit safety of busbar voltage and the out-of-limit Optimal Decision-making that is safe and carrying out of mains frequency calculate, if
Electric system is not at quasi-steady running state in safety and stability emergent control Real-time Decision calculating process, then stops safety and stability
Emergent control Real-time Decision calculates；
It is as shown in Figure 2 for safety and stability emergent control Real-time Decision calculation process：
Fig. 2 steps 1：According to the electric system quasi-steady running profile data being newly generated, the trend of electric system is established
Equation enters step 2；
Fig. 2 steps 2：The majorized function indicated by solution formula (2) calculates accurate for the electric system being newly generated
T corresponding to steady-state operation profile datarThe safety and stability emergent control Real-time Decision of moment electric system.
In formula (2), I is pre-set generated power in generator node including equivalent generator node
The sum of controllable node, CG.i、ΔPG.iThe generator unit active power adjustment cost of respectively i-th generated power controllable node
With generated power variable quantity, J is pre-set load controllable node in load bus including duty value node
Sum, CL.j、ΔPL.jThe unit demand active power adjustment cost of respectively j-th load controllable node and the active variation of load
Amount, PG.i.0、PG.i.max、PG.i.minThe Generator Stable of respectively i-th generated power controllable node is active, Generator Stable
It is active in Δ tcThe upper limit and Generator Stable in interior controllable section are active in Δ tcThe lower limit in interior controllable section, PL.j.0、PL.j.minPoint
Not Wei j-th of load controllable node load stable state is active and load stable state is active in Δ tcThe lower limit in interior controllable section, K are electricity
Transmission facility number in net, Pk.0Stable state for k-th of transmission facility is active, Pk.LMTFor the active limit of stable state of k-th of transmission facility
Volume, sk.G.iTo be based on k-th of the generated power pair of calculated i-th of generated power controllable node of step 1) power flow equation
The active sensitivity of transmission facility, sk.L.jTo be based on the load of calculated j-th of load controllable node of step 1) power flow equation
The active sensitivity active to k-th of transmission facility, M are the passway for transmitting electricity number monitored for safety and stability, NmIt is used for for m-th
Transmission facility number in the passway for transmitting electricity of safety and stability monitoring, Pm.0、Pm.LMTP'm.LMTRespectively m-th for safety and stability prison
Depending on passway for transmitting electricity stable state is active, forward security stability limitation and reversed safety and stability limit, sm.n.G.iTo be based on step 1)
M-th of the generated power pair of calculated i-th of generated power controllable node of power flow equation is for safety and stability monitoring
The active sensitivity of n-th of transmission facility, s in passway for transmitting electricitym.n.L.iIt is negative to be based on calculated j-th of step 1) power flow equation
The active spirit active to n-th of transmission facility in m-th of passway for transmitting electricity for safety and stability monitoring of load of lotus controllable node
Sensitivity, PG.sum.r、frRespectively with the P corresponding to the electric system quasi-steady running profile data that is newly generatedG.sum.rAnd fr,
PG.sum.r.0、fr.0The P corresponding to electric system quasi-steady running profile data respectively generated with previous timeG.sum.rAnd fr,
fcr.low、fcr.upThe respectively lower and upper limit of Power System Steady-state frequency out-of-limit safety, X are pre-set idle controllable node number,
Qx.0、ΔQx、Qx.min、Qx.maxThe stable state of the reactive apparatus of respectively x-th idle controllable node is idle, stable state idle work variable quantity,
Minimum value that stable state is idle and the idle maximum value of stable state, B are the number of nodes in power grid, Vb.0、Vb.low、Vb.upRespectively b-th of node
Steady state voltage, steady state voltage lower limit and the steady state voltage upper limit, svq.b.xTo be based on step 1) power flow equation calculated x-th
The idle sensitivity to b-th of node voltage of the reactive apparatus of idle controllable node.
The flow of the control decision selection is as shown in Figure 3.
Step 1 in Fig. 3：If safety and stability emergent control Real-time Decision calculate the newest result of decision in have control measure and
The electric power that the newest result of decision that the electric system current time of running calculates with safety and stability emergent control Real-time Decision is based on
T corresponding to system quasi-steady running profile datarBetween duration be less than setting value Δ t1(being usually arranged as 30s), then will peace
The complete newest result of decision for stablizing emergent control Real-time Decision calculating terminates this secondary control and determines as the control decision for execution
Otherwise the selection of plan enters step 2；
Step 2 in Fig. 3：If the generation moment t of some forecast failure in FfWith safety and stability emergent control on-line pre-decision system
The t corresponding to electric system quasi-steady running profile data that the newest result of decision of the forecast failure is based in calculatingrIt
Between duration be less than setting value Δ t2(being usually arranged as 2 minutes) and trEarlier than tf, then safety and stability emergent control is determined in advance online
The newest result of decision of the forecast failure terminates the choosing of this control decision as the control decision for execution during plan calculates
It selects, otherwise, enters step 3；
Step 3 in Fig. 3：If the electric system current time of running calculates newest with safety and stability prevention and control on-line decision
The t corresponding to electric system quasi-steady running profile data that the result of decision is based onrBetween duration be less than setting value Δ t3
(being usually arranged as 5 minutes), then the newest result of decision calculated safety and stability prevention and control on-line decision is as executing
Control decision, terminate the selection of this control decision, otherwise it is assumed that control measure need not be taken electric system, terminate
The selection of this control decision.
The electric system quasi-steady running state recognition, electric system quasi-steady running profile data generate, safety is steady
Determine the calculating of prevention and control on-line decision, safety and stability emergent control on-line pre-decision system calculates, safety and stability emergent control is determined in real time
Plan calculates and the pattern independent operating that cycle executes is pressed in control decision selection respectively in the operational process of electric system.
It should be further noted that：Electric system for Asynchronous Interconnection, need for each synchronised grids respectively into
The above-mentioned processing of row, and count and synchronised grids between straight-flow system current conversion station power adjustment to sending end synchronised grids electricity synchronous with receiving end
The influence of net safety and stability.
Although the present invention has been described by way of example and in terms of the preferred embodiments, embodiment is not for the purpose of limiting the invention.Not
It is detached from the spirit and scope of the present invention, any equivalent change or retouch done also belongs to the protection domain of the present invention.Cause
This protection scope of the present invention should be using the content that claims hereof is defined as standard.
Claims (3)
1. a kind of power system security stablizes online integrated campaign method, which is characterized in that including electric system quasi-steady running
State recognition, electric system quasi-steady running profile data generate, safety and stability prevention and control on-line decision calculates, safety and stability
Emergent control on-line pre-decision system calculates, safety and stability emergent control Real-time Decision calculates and control decision selection, wherein：
If the electric system quasi-steady running state recognition refers to each busbar frequency in electric system in setting duration Δ t
Fluctuating range is both less than setting value Δ f, then current operating conditions are identified as electric system is in quasi-steady running state, no
Then, current operating conditions are identified as electric system and are not at quasi-steady running state；
It refers to the result for working as electric system quasi-steady running state recognition that the electric system quasi-steady running profile data, which generates,
When being in quasi-steady running state for electric system, first, will current time as electric system quasi-steady running profile data
T at the time of correspondingr, then, Network topology is carried out to electric system current operating conditions, then save for each calculating
Point, respectively by each calculate node in trTime Δt is to trStable state of the average frequency value as the calculate node between moment
Frequency, and using the average value of the steady frequency of all calculate nodes as the steady frequency f of electric systemr, for each injection
Node, it is respectively that each injection node is active/idle in trTime Δt is to trAverage value between moment is as the injection node
Stable state it is active/idle, for each calculate node, respectively by each calculate node voltage in trTime Δt is to trMoment it
Between steady state voltage of the average value as the calculate node, finally, according to network topology and model and parameter, fr, each injection
The steady state voltage of active/idle and each node of stable state of node generates electric system quasi-steady running profile data, and will include
The Generator Stable of generator node including equivalent generator node is the sum of active to be used as electric system quasi-steady running section
The sum of generated power output corresponding to data PG.sumr；
The injection node includes generator node, load bus and reactive apparatus access node, and the generator node includes
Equivalent generator node, the load bus include duty value node；
Safety and stability prevention and control on-line decision calculating refers to when electric system is in quasi-steady running state and most newborn
At electric system quasi-steady running profile data corresponding to trWhen duration between current time is less than Δ t, note is all
It is F to need the forecast failure collection defendd, and for F, based on the electric system quasi-steady running profile data being newly generated, considers to protect
Shield, peace are from the Controlling model and parameter of device and AGC/AVC, and to meet, electric system can after each forecast failure generation in F
It keeps transient safe and stable, dynamic security stable and static security stabilization optimizes decision calculating, if preventing in safety and stability
Electric system is not at quasi-steady running state in control on-line decision calculating process, then it is online to stop safety and stability prevention and control
Decision calculates；
Safety and stability emergent control on-line pre-decision system calculating refers to when electric system is in quasi-steady running state and newest
T corresponding to the electric system quasi-steady running profile data of generationrWhen duration between current time is less than Δ t, for F
In each forecast failure, the electric system quasi-steady running profile data being newly generated is based respectively on, to meet corresponding anticipation
When being transitioned into quasi-steady state after transient state and dynamic process under failure electric system can keep transmission cross-section it is active it is out-of-limit safety,
The out-of-limit safety of apparatus overload safety, busbar voltage and the out-of-limit safety of mains frequency optimize decision calculating, if in safety and stability
Electric system is not at quasi-steady running state in emergent control on-line pre-decision system calculating process, then stops safety and stability and promptly control
On-line pre-decision system processed calculates；
Safety and stability emergent control Real-time Decision calculating refers to when electric system is in quasi-steady running state and most newborn
At electric system quasi-steady running profile data corresponding to trWhen duration between current time is less than Δ t, based on most
Newly-generated electric system quasi-steady running profile data can keep the active out-of-limit peace of transmission cross-section to meet electric system
Entirely, the out-of-limit safety of apparatus overload safety, busbar voltage and the out-of-limit safety of mains frequency optimize decision calculating, if steady in safety
Determine electric system in emergent control Real-time Decision calculating process and be not at quasi-steady running state, then stops safety and stability and promptly control
Real-time Decision processed calculates；
The control decision selection includes the following steps：
If 1) have control measure in the newest result of decision that safety and stability emergent control Real-time Decision calculates and electric system be current
The electric system quasi-steady state that the newest result of decision that the time of running calculates with safety and stability emergent control Real-time Decision is based on is transported
T corresponding to row profile datarBetween duration be less than setting value Δ t1, then safety and stability emergent control Real-time Decision is calculated
The newest result of decision as execution control decision, terminate the selection of this control decision, otherwise, enter step 2)；
If 2) in F some forecast failure generation moment tfAnticipation event in being calculated with safety and stability emergent control on-line pre-decision system
The t corresponding to electric system quasi-steady running profile data that the newest result of decision of barrier is based onrBetween duration be less than set
Definite value Δ t2And trEarlier than tf, then the newest decision knot of the forecast failure in calculating safety and stability emergent control on-line pre-decision system
Fruit terminates the selection of this control decision, otherwise, enters step 3) as the control decision for execution；
If 3) the newest result of decision institute base that the electric system current time of running calculates with safety and stability prevention and control on-line decision
In electric system quasi-steady running profile data corresponding to trBetween duration be less than setting value Δ t3, then by safety and stability
The newest result of decision that prevention and control on-line decision calculates terminates the choosing of this control decision as the control decision for execution
It selects, otherwise it is assumed that control measure need not be taken to electric system, terminates the selection of this control decision；
The electric system quasi-steady running state recognition, electric system quasi-steady running profile data generate, safety and stability is pre-
Anti- control on-line decision calculates, safety and stability emergent control on-line pre-decision system calculates, safety and stability emergent control Real-time Decision meter
It calculates and the pattern independent operating that cycle executes is pressed in control decision selection respectively in the operational process of electric system.
2. power system security according to claim 1 stablizes online integrated campaign method, which is characterized in that the safety
Stablize emergent control on-line pre-decision system to calculate, for each forecast failure in F, carries out the calculating of following steps respectively：
A-1) based on the electric system quasi-steady running profile data being newly generated, protection, peace are accounted for for forecast failure
From the time-domain-simulation of device and AGC/AVC Controlling models and parameter, until in emulation to each calculate node dynamic process of frequency
When the difference of adjacent maximum and minimum is both less than setting value Δ f, time-domain-simulation is terminated, the frequency of each calculate node is obtained
Dynamic process, active/idle dynamic process of each injection node, the active dynamic process of each transmission facility and each calculating
The voltage dynamic process of node, enters step A-2)；
The transmission facility includes line and transformer；
A-2 it) is directed to each calculate node, the maximum before each calculate node dynamic process of frequency terminates and pole will be calculated respectively
Steady frequency of the average value of both small values as the calculate node after consideration forecast failure, then by the stable state of all calculate nodes
Steady frequency f of the average value of frequency as electric system after consideration forecast failuree；It, respectively will be each for each injection node
A injection node is active/idle dynamic process terminate before maximum and both minimums average value as consideration forecast failure
The stable state of the injection node is active/idle afterwards, and the generator of the generator node including equivalent generator node is steady
State is the sum of active to be denoted as PG.sume；For each transmission facility, the pole before respectively terminating the active dynamic process of each transmission facility
The average value of big value and both minimums is active as the stable state of the transmission facility after consideration forecast failure, then is used for for each
The passway for transmitting electricity of safety and stability monitoring, it is respectively that the stable state of all transmission facilities in each passway for transmitting electricity is the sum of active as considering
The stable state of the passway for transmitting electricity is active after forecast failure；For each calculate node, respectively by each calculate node voltage dynamic mistake
Journey terminate before maximum and both minimums average value as consider forecast failure after the calculate node steady state voltage, into
Enter step A-3)；
A-3) according to active/idle net with electric system after forecast failure of stable state of each injection node after consideration forecast failure
Network topology and model and parameter, establish the power flow equation of electric system, enter step A-4)；
A-4) the majorized function indicated by solution formula (1) is calculated for the electric system quasi-steady running being newly generated
T corresponding to profile datarThe safety and stability emergent control on-line pre-decision system of the moment forecast failure：
In formula (1), I is that pre-set generated power is controllable in generator node including equivalent generator node
The sum of node, CG.i、ΔPG.iThe generator unit active power adjustment cost and hair of respectively i-th generated power controllable node
The active variable quantity of motor, J are the total of pre-set load controllable node in load bus including duty value node
Number, CL.j、ΔPL.jThe unit demand active power adjustment cost and the active variable quantity of load of respectively j-th load controllable node,
PG.i.0.e、PG.i.max.e、PG.i.min.eRespectively there is the Generator Stable of i-th of generated power controllable node after forecast failure
The active duration Δ t in setting of work(, Generator StablecThe upper limit and Generator Stable in interior controllable section are active in Δ tcIt is interior controllable
The lower limit in section, PL.j.0.e、PL.j.min.eThe load stable state of j-th of load controllable node is active and negative respectively after forecast failure
Lotus stable state is active in Δ tcThe lower limit in interior controllable section, K are the transmission facility number in power grid, Pk.0.eIt is k-th after forecast failure
The stable state of transmission facility is active, Pk.LMTFor the active limit of stable state of k-th of transmission facility, sk.G.i.eTo be based on step A-3) trend
The active sensitivity of k-th of transmission facility of generated power pair of i-th of generated power controllable node that equation calculation goes out,
sk.L.j.eTo be based on step A-3) load of calculated j-th of load controllable node of power flow equation is active is set to k-th of transmission of electricity
The sensitivity of work(is had, M is the passway for transmitting electricity number monitored for safety and stability, NmFor m-th for the defeated of safety and stability monitoring
Transmission facility number in electric channel, Pm.0.e、Pm.LMT.e、P′m.LMT.eIt is monitored for safety and stability for m-th respectively after forecast failure
Passway for transmitting electricity stable state is active, forward security stability limitation and reversed safety and stability limit, sm.n.G.i.eTo be based on step A-3)
M-th of the generated power pair of calculated i-th of generated power controllable node of power flow equation is for safety and stability monitoring
The active sensitivity of n-th of transmission facility, s in passway for transmitting electricitym.n.L.i.eTo be based on step A-3) the calculated jth of power flow equation
The load of a load controllable node is active active to n-th of transmission facility in m-th of passway for transmitting electricity for safety and stability monitoring
Sensitivity, PG.sum.r、frRespectively with the P corresponding to the electric system quasi-steady running profile data that is newly generatedG.sum.rWith
fr, fcr.low、fcr.upThe respectively lower and upper limit of Power System Steady-state frequency out-of-limit safety, λ are to consider emulation and practical dynamic process
The parameter for having differences and setting, X are pre-set idle controllable node number, Qx.0.e、ΔQx、Qx.min.e、Qx.max.eRespectively
The stable state of the reactive apparatus of x-th of idle controllable node is idle after forecast failure, stable state idle work variable quantity, stable state is idle minimum value
With the idle maximum value of stable state, B is the number of nodes in power grid, Vb.0.e、Vb.low.e、Vb.up.eB-th of node respectively after forecast failure
Steady state voltage, steady state voltage lower limit and the steady state voltage upper limit, svq.b.x.eTo be based on step A-3) the calculated xth of power flow equation
The idle sensitivity to b-th of node voltage of the reactive apparatus of a idle controllable node；
The active limit of stable state of the transmission facility refers to overload current limit and rated voltage according to transmission facility, by specified
The stable state that power factor calculates is active.
3. power system security according to claim 1 stablizes online integrated campaign method, which is characterized in that for safety
Stablize emergent control Real-time Decision calculating to include the following steps：
B-1) according to the electric system quasi-steady running profile data being newly generated, the power flow equation of electric system is established, is entered
Step B-2)；
B-2) the majorized function indicated by solution formula (2) is calculated for the electric system quasi-steady running being newly generated
T corresponding to profile datarThe safety and stability emergent control Real-time Decision of moment electric system：
In formula (2), I is that pre-set generated power is controllable in generator node including equivalent generator node
The sum of node, CG.i、ΔPG.iThe generator unit active power adjustment cost and hair of respectively i-th generated power controllable node
The active variable quantity of motor, J are the total of pre-set load controllable node in load bus including duty value node
Number, CL.j、ΔPL.jThe unit demand active power adjustment cost and the active variable quantity of load of respectively j-th load controllable node,
PG.i.0、PG.i.max、PG.i.minThe Generator Stable of respectively i-th generated power controllable node is active, Generator Stable has
Work(is in Δ tcThe upper limit and Generator Stable in interior controllable section are active in Δ tcThe lower limit in interior controllable section, PL.j.0、PL.j.minRespectively
Load stable state for j-th of load controllable node is active and load stable state is active in Δ tcThe lower limit in interior controllable section, K are power grid
In transmission facility number, Pk.0Stable state for k-th of transmission facility is active, Pk.LMTFor the active limit of stable state of k-th of transmission facility
Volume, sk.G.iTo be based on step B-1) generated power of calculated i-th of generated power controllable node of power flow equation is to kth
The active sensitivity of a transmission facility, sk.L.jTo be based on step B-1) calculated j-th of load controllable node of power flow equation
The active sensitivity active to k-th of transmission facility of load, M are the passway for transmitting electricity number monitored for safety and stability, NmIt is m-th
For the transmission facility number in the passway for transmitting electricity of safety and stability monitoring, Pm.0、Pm.LMT、P′m.LMTRespectively m-th steady for safety
Surely the stable state of the passway for transmitting electricity monitored is active, forward security stability limitation and reversed safety and stability limit, sm.n.G.iTo be based on walking
Rapid B-1) m-th of the generated power pair of calculated i-th of generated power controllable node of power flow equation is used for safety and stability
The active sensitivity of n-th of transmission facility, s in the passway for transmitting electricity of monitoringm.n.L.iTo be based on step B-1) power flow equation calculates
J-th of load controllable node load it is active to m-th for safety and stability monitoring passway for transmitting electricity in n-th of transmission facility
Active sensitivity, PG.sum.r、frRespectively with corresponding to the electric system quasi-steady running profile data that is newly generated
PG.sum.rAnd fr, PG.sum.r.0、fr.0Corresponding to the electric system quasi-steady running profile data respectively generated with previous time
PG.sum.rAnd fr, fcr.low、fcr.upThe respectively lower and upper limit of Power System Steady-state frequency out-of-limit safety, X are pre-set idle
Controllable node number, Qx.0、ΔQx、Qx.min、Qx.maxThe stable state of the reactive apparatus of respectively x-th idle controllable node is idle, stable state
Minimum value that idle work variable quantity, stable state are idle and the idle maximum value of stable state, B are the number of nodes in power grid, Vb.0、Vb.low、Vb.upRespectively
For the steady state voltage, steady state voltage lower limit and the steady state voltage upper limit of b-th of node, svq.b.xTo be based on step B-1) power flow equation
The idle sensitivity to b-th of node voltage of the reactive apparatus of calculated x-th of idle controllable node.
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| CN110556828B (en) * | 2019-09-25 | 2022-08-30 | 国电南瑞科技股份有限公司 | Online safety and stability emergency control method and system adaptive to equipment power flow change |
| CN110690703B (en) * | 2019-11-04 | 2021-05-18 | 国电南瑞科技股份有限公司 | Fault defense online policy table generation method, online safety and stability emergency control method and system |
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