CN107104446B - It is a kind of using global optimum as the power grid automatic voltage control method and system of target - Google Patents
It is a kind of using global optimum as the power grid automatic voltage control method and system of target Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a kind of using global optimum as the power grid automatic voltage control method and system of target, method and step includes obtaining the real-time state estimation result of power grid by calculating cycle, if state estimation result is restrained and certified rate of telemetering is more than or equal to threshold value, the state desired value in each reactive voltage source is then calculated by global optimization method, if otherwise busbar voltage is exceeded, the state desired value in each discrete adjustable reactive voltage source is then assigned a value of to the value of a upper calculating cycle, the state desired value in each continuously adjustable reactive voltage source is calculated；If busbar voltage is not exceeded, the state desired value in each reactive voltage source is assigned a value of to the value of a upper calculating cycle；State desired value is finally issued into execution；System includes each unit corresponding with aforementioned method steps.The present invention is not required to sub-area division, optimal for control target with global reactive power flow while meeting each busbar voltage demand of power grid, can further decrease network loss, realize the economical operation of power grid global optimum.
Description
Technical field
The present invention relates to the power grid automatism voltage control technologies of electric system, and in particular to one kind is using global optimum as target
Power grid automatic voltage control method and system.
Background technique
Automatism voltage control (Automatic Voltage Control, AVC) is modern power network voltage, idle control
Major Systems, by grid-connected unit, power grid dynamic passive compensation equipment, shunt capacitance the reactive voltages such as reactor, transformer
The automatic unified regulation in source, improves grid voltage quality, reduces network loss, guarantee the high-quality operation of power grid security economy.
There are mainly two types of modes for existing AVC system: one kind is three class control mode, i.e., entire control system is divided into three layers
Secondary: three-level, secondary voltage control are power grid regulation central master station centralized controls at different levels, and control time constant is usually minute grade；
Tertiary voltage control is target by network optimum economy, each region maincenter busbar voltage is calculated according to state estimation result
Desired value；Power grid is divided into several regions by secondary voltage control, real by maincenter busbar voltage according to SCADA real-time sampling data
Duration and desired value deviate minimum target, and the state desired value in each reactive voltage source is calculated；Voltage order one control is nothing
Function voltage source controls on the spot, controls idle or busbar voltage and tracks desired value.One kind is class nine-area control mode, i.e., by power grid
After being divided into several regions, according to region maincenter busbar voltage and it is idle lack, be full of, control capacitor reactor throwing move back or transformer
Tap joint position adjustment, generating set increase or decrease idle output.
Existing both of which advantage is, Shandong lower to SCADA real-time sampling data and state estimation result dependence
Stick is preferable.But both modes all have a problem that: can not accomplish global optimum.Three-level electricity in three class control mode
Though obtaining result in voltage-controlled system is global optimum, after secondary voltage control coordination, obtained result is only to have
The feasible value for obtaining region maincenter busbar voltage identical as global optimum, greatly differs from each other with true global optimum；9th area of class
Be calculated in figure control model with the immediate feasible value of last moment state, nor global optimum.In addition, two kinds of moulds
Formula is required to carry out artificial subregion to the power grid in the same scheduling range, and power grid connection at present is increasingly close, and power grid is divided into
Several regions for the very little that influences each other are more and more difficult, if subregion is inappropriate, may cause the unbalance of control.
With electric network reactive-load, abundant, the SCADA real-time sampling data accuracy, timeliness and complete of regulating and controlling voltage means
Property raising, state estimation certified rate of telemetering is maintained at 99% or more for a long time, and calculating data increases substantially, most with the power grid overall situation
The figure of merit is that control target is possibly realized.Therefore, it is necessary to it is a kind of be not required to subregion, with global optimum be control target power grid automatic electric
Press control strategy and corresponding realization system.The existing method for being related to power grid automatism voltage control is many, but not with the overall situation
It is optimal for the control strategy of target, method or system.Such as application No. is 20121042477.6 Chinese patent literatures to disclose one
Kind multilevel automatic voltage reactive power control system AVC coordination control is carried out multistage power grid using three class control mode and is coordinated, needs
Layering and zoning processing is carried out to power grid, and gained control result is only feasible value, non-global optimum；Such as application No. is
201410383572.2 Chinese patent literature disclose a kind of power-less optimized controlling method and system, by power system delamination and subarea
Afterwards, by nine-area control is carried out, control target is also not global optimum.
Summary of the invention
The technical problem to be solved in the present invention: in view of the above problems in the prior art, one kind is provided and does not need to carry out power grid
Subregion, it is optimal for control target with global reactive power flow while meeting each busbar voltage demand of power grid, it can further drop
Low network loss, realization power grid global optimum economical operation as the power grid automatic voltage control method of target and are using global optimum
System.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
On the one hand, the present invention provides a kind of using global optimum as the power grid automatic voltage control method of target, implementation steps
Include:
1) power grid real-time status data and state estimation result are obtained by calculating cycle；
2) if state estimation result is restrained and certified rate of telemetering is more than or equal to threshold value, jumps and execute step 3), otherwise,
It jumps and executes step 4)；
3) according to state estimation result, each idle electricity is calculated by global optimization method to the power grid in scheduled range
The state desired value of potential source, the state desired value in each reactive voltage source include the idle power output in continuously adjustable reactive voltage source
State, load tap changer position are thrown or moved back with grid-connected voltage, capacitor and reactor；It jumps and executes step 7)；
4) check whether each busbar voltage is exceeded, if busbar voltage is exceeded, thens follow the steps 5)；It is no to then follow the steps 6)；
5) state that the state desired value in each discrete adjustable reactive voltage source is assigned a value of a upper calculating cycle it is expected
Value, the busbar voltage desired value by the busbar voltage desired value of a upper calculating cycle as this calculating cycle, according to real-time number
According to the state desired value in each continuously adjustable reactive voltage source is calculated by coordinated secondary voltage control method；It is described it is discrete can
The state desired value for adjusting reactive voltage source includes that capacitor and reactor are thrown or move back state, load tap changer position, and do not include
The state desired value in continuously adjustable reactive voltage source；The state desired value in the continuously adjustable reactive voltage source includes continuously adjustable
The idle power output and grid-connected voltage in reactive voltage source, and do not include the state desired value in discrete adjustable reactive voltage source；The company
Continuing adjustable reactive voltage source includes power grid dynamic passive compensation equipment, grid-connected generation of electricity by new energy factory, grid-connected conventional hydropower unit, fire
Four kinds of motor group idle continuously adjustable appliance arrangements of contributing；It jumps and executes step 7)；
6) the state desired value in each reactive voltage source is assigned a value of to the state desired value of a upper calculating cycle, continues to hold
Row step 7)；
7) the state desired value of this calculating cycle each reactive voltage Source Type is handed down to remote regulating or telecommand to execute.
Preferably, each reactive voltage source is calculated by global optimization method to the power grid in scheduled range in step 3)
The detailed step of state desired value include: using global loss minimization as objective function, with grid power balance, above and below voltage
Limit, active/idle power output up and down be limited to boundary condition, with reactive voltage source state desired value be control variable, by it is preset
Line optimization algorithm is carried out power grid optimal load flow and is calculated, and the state desired value in each reactive voltage source is obtained.
Preferably, the mathematical model such as formula (1) of the preset on-line optimization algorithm and (2) are shown；
min f(x)(1)
In formula (1) and (2), x is the state desired value as each reactive voltage source of control variable, including continuously adjustable nothing
State, load tap changer position are thrown or moved back to the idle power output and grid-connected voltage of function voltage source, capacitor and reactor, and f (x) is mesh
Scalar functions, using global loss minimization；G (x) is equation boundary condition, using electric network active/reactive power equilibrium；H (x) is not
Equation boundary condition, hminFor busbar voltage lower limit, idle power output lower limit, hmaxFor bus voltage upper limit, the idle power output upper limit.
Preferably, the preset on-line optimization algorithm uses prim al- dual interior point m ethod or the inferior method of newton pressgang.
Preferably, the shape in each continuously adjustable reactive voltage source is calculated in step 5) by coordinated secondary voltage control method
The detailed step of state desired value includes: with busbar voltage real value and the minimum control target of deviation from the desired value amount, with each continuous
It is accessible in this calculating cycle of the state desired value in adjustable reactive voltage source to be limited to boundary condition up and down, by all types of bus electricity
The idle sensitivity to each continuously adjustable reactive voltage source is pressed, preset busbar voltage optimal control method is carried out, is obtained each
The state desired value in continuously adjustable reactive voltage source；The all types of busbar voltages include maincenter busbar voltage, critical busses electricity
Pressure, control bus voltage.
Preferably, carry out shown in mathematical model such as formula (3) and (4) of preset busbar voltage optimal control method；
In formula (3) and (4), VpAnd Vp refRespectively maincenter bus real-time voltage and target voltage, CpgFor maincenter bus electricity
Press the idle sensitivity coefficient matrix to each continuously adjustable reactive voltage source, Δ QgTo be continuously adjusted the idle tune in reactive voltage source
Whole desired value, r and h are weight coefficient, and θ is idle coordination vector；Qg、Qg max、Qg minWork as in respectively continuously adjustable reactive voltage source
Preceding idle power output, idle upper and lower bound, Vc、Vc max、Vc minRespectively critical busses current voltage, upper voltage limit and lower limit, Ccg
It is critical busses voltage to the idle sensitivity coefficient matrix in each continuously adjustable reactive voltage source, CvgFor control bus voltage pair
The idle sensitivity coefficient matrix in each continuously adjustable reactive voltage source, Δ VH maxFor each control bus voltage maximal regulated
Amount.
Preferably, the calculating cycle in step 1) is minute grade, and value range is 1~60 minute；Threshold in step 2)
Value is 99%.
On the other hand, the present invention also provides a kind of using global optimum as the power grid automatic voltage control system of target, comprising:
Data acquisition unit, for obtaining power grid real-time status data and state estimation result by calculating cycle；
Central control unit, for carrying out state desired value calculating, if state estimation result is restrained and certified rate of telemetering is big
The power grid in scheduled range is calculated respectively by global optimization method then according to state estimation result in being equal to threshold value
The state desired value in reactive voltage source, the state desired value in each reactive voltage source include the nothing in continuously adjustable reactive voltage source
State, load tap changer position are thrown or moved back to function power output and grid-connected voltage, capacitor and reactor；Otherwise, each busbar voltage is checked
It is whether exceeded, if busbar voltage is exceeded, the state desired value in each discrete adjustable reactive voltage source is assigned a value of to be equal to upper one
The state desired value of a calculating cycle, the bus electricity by the busbar voltage desired value of a upper calculating cycle as this calculating cycle
Press desired value that the shape in each continuously adjustable reactive voltage source is calculated by coordinated secondary voltage control method according to real time data
State desired value；The state desired value in the discrete adjustable reactive voltage source includes that state, transformer are thrown or moved back to capacitor and reactor
Tap joint position, and do not include the state desired value in continuously adjustable reactive voltage source；The shape in the continuously adjustable reactive voltage source
State desired value includes the idle power output and grid-connected voltage in continuously adjustable reactive voltage source, and does not include discrete adjustable reactive voltage source
State desired value；The continuously adjustable reactive voltage source include power grid dynamic passive compensation equipment, grid-connected generation of electricity by new energy factory,
Grid-connected conventional hydropower unit, four kinds of fired power generating unit idle continuously adjustable appliance arrangements of contributing；If otherwise busbar voltage is not exceeded,
The state desired value in each reactive voltage source is assigned a value of to the state desired value equal to a upper calculating cycle；
Control execution unit on the spot, for the state desired value of this calculating cycle to be handed down to respectively with remote regulating or telecommand
Reactive voltage Source Type executes.
Preferably, the data acquisition unit is specially SCADA main station system.
Preferably, the central control unit is deployed in dispatching control center as automatism voltage control AVC three class control
Three-level and secondary voltage control layer in system, for being continuously adjusted reactive voltage source, central control unit is by state desired value
It is issued as remote regulating instruction；For discrete adjustable reactive voltage source, central control unit is using state desired value as telecommand
It issues；The control execution unit on the spot is deployed in each reactive voltage source, as in automatism voltage control AVC three-stage control system
Level-one control layer execute the central control unit remote regulating or telecommand that issue under the premise of meeting security boundary condition.
The present invention using global optimum as the power grid automatic voltage control method of target have an advantage that the present invention first by
Calculating cycle obtains power grid real-time status data and state estimation result, if state estimation result is restrained and certified rate of telemetering is greater than
Equal to threshold value, then according to state estimation result, each nothing is calculated by global optimization method to the power grid in scheduled range
Otherwise whether exceeded the state desired value of function voltage source checks each busbar voltage, if busbar voltage is exceeded, by it is each it is discrete can
The state desired value in reactive voltage source is adjusted to be assigned a value of the state desired value an of calculating cycle, by a upper calculating cycle
Busbar voltage desired value of the busbar voltage desired value as this calculating cycle, according to real time data, by coordinated secondary voltage control
The state desired value in each continuously adjustable reactive voltage source is calculated in method；If busbar voltage is not exceeded, by each reactive voltage
The state desired value in source is assigned a value of the state desired value an of calculating cycle；Finally, the state of this calculating cycle it is expected
Value is handed down to each reactive voltage Source Type with remote regulating or telecommand and executes, and the present invention is not required to the electricity in the same scheduling range
Net subregion is met the requirements in real time data quality (accuracy, timeliness, integrality), i.e. state estimation result convergence and telemetering
Qualification rate is greater than threshold value, carries out global optimization control so that global reactive power flow is optimal for control target；In real time data quality
When being unsatisfactory for requiring, the idle power output of continuous reactive voltage source is only adjusted in a limited degree using coordinated secondary voltage control method,
Network loss can be further decreased when real time data quality is met the requirements, and realize the economical operation of power grid global optimum；In real time data
When quality is unsatisfactory for requiring, not only utmostly ensure that control security, but efficiently avoid capacitor reactor frequent throwing
And it is frequently adjusted with power transformation device tap.
Detailed description of the invention
Fig. 1 is the basic procedure schematic diagram of present invention method.
Fig. 2 is the basic frame structure schematic diagram of system of the embodiment of the present invention.
Specific embodiment
As shown in Figure 1, the present embodiment is using global optimum as the implementation steps packet of the power grid automatic voltage control method of target
It includes:
1) power grid real-time status data and state estimation result are obtained by calculating cycle；
2) if state estimation result is restrained and certified rate of telemetering is more than or equal to threshold value, jumps and execute step 3), otherwise,
It jumps and executes step 4)；
3) according to state estimation result, each idle electricity is calculated by global optimization method to the power grid in scheduled range
The state desired value of potential source, the state desired value in each reactive voltage source include the idle power output and simultaneously in continuously adjustable reactive voltage source
State, load tap changer position are thrown or moved back to net voltage, capacitor and reactor；It jumps and executes step 7)；
4) check whether each busbar voltage is exceeded, if busbar voltage is exceeded, thens follow the steps 5)；It is no to then follow the steps 6)；
5) state that the state desired value in each discrete adjustable reactive voltage source is assigned a value of a upper calculating cycle it is expected
Value, the busbar voltage desired value by the busbar voltage desired value of a upper calculating cycle as this calculating cycle, according to real-time number
According to the state desired value in each continuously adjustable reactive voltage source is calculated by coordinated secondary voltage control method；Discrete adjustable nothing
The state desired value of function voltage source includes capacitor and reactor throwing or moves back state, load tap changer position, and does not include continuous
The state desired value in adjustable reactive voltage source；The state desired value in continuously adjustable reactive voltage source includes continuously adjustable reactive voltage
The idle power output and grid-connected voltage in source, and do not include the state desired value in discrete adjustable reactive voltage source；It is continuously adjusted idle electricity
Potential source includes four kinds of power grid dynamic passive compensation equipment, grid-connected generation of electricity by new energy factory, grid-connected conventional hydropower unit, fired power generating unit nothings
Function, which is contributed, is continuously adjusted appliance arrangement；It jumps and executes step 7)；
6) the state desired value in each reactive voltage source is assigned a value of to the state desired value of a upper calculating cycle, continues to hold
Row step 7)；
7) the state desired value of this calculating cycle each reactive voltage Source Type is handed down to remote regulating or telecommand to execute.
In the present embodiment, each idle electricity is calculated by global optimization method to the power grid in scheduled range in step 3)
The detailed step of the state desired value of potential source includes: using global loss minimization as objective function, on grid power balance, voltage
Lower limit, active/idle power output are limited to boundary condition up and down, are control variable with reactive voltage source state desired value, by preset
On-line optimization algorithm is carried out power grid optimal load flow and is calculated, and the state desired value in each reactive voltage source is obtained.
In the present embodiment, shown in the mathematical model such as formula (1) of preset on-line optimization algorithm and (2)；
min f(x) (1)
In formula (1) and (2), x is the state desired value as each reactive voltage source of control variable, including continuously adjustable nothing
State, load tap changer position are thrown or moved back to the idle power output and grid-connected voltage of function voltage source, capacitor and reactor, and f (x) is mesh
Scalar functions, using global loss minimization；G (x) is equation boundary condition, using electric network active/reactive power equilibrium；H (x) is not
Equation boundary condition, hminFor busbar voltage lower limit, idle power output lower limit, hmaxFor bus voltage upper limit, the idle power output upper limit.
In the present embodiment, preset on-line optimization algorithm uses prim al- dual interior point m ethod or the inferior method of newton pressgang.
In the present embodiment, each continuously adjustable reactive voltage source is calculated by coordinated secondary voltage control method in step 5)
The detailed step of state desired value include: with busbar voltage real value and the minimum control target of deviation from the desired value amount, with each
It is accessible in continuously adjustable this calculating cycle of the state desired value in reactive voltage source to be limited to boundary condition up and down, by all types of mothers
Idle sensitivity of the line voltage to each continuously adjustable reactive voltage source, carries out preset busbar voltage optimal control method, obtains
To the state desired value in each continuously adjustable reactive voltage source；All types of busbar voltages include maincenter busbar voltage, critical busses electricity
Pressure, control bus voltage.
In the present embodiment, carry out shown in mathematical model such as formula (3) and (4) of preset busbar voltage optimal control method；
In formula (3) and (4), VpAnd Vp refRespectively maincenter bus real-time voltage and target voltage, CpgFor maincenter bus electricity
Press the idle sensitivity coefficient matrix to each continuously adjustable reactive voltage source, Δ QgTo be continuously adjusted the idle tune in reactive voltage source
Whole desired value, r and h are weight coefficient, and θ is idle coordination vector；Qg、Qg max、Qg minWork as in respectively continuously adjustable reactive voltage source
Preceding idle power output, idle upper and lower bound, Vc、Vc max、Vc minRespectively critical busses current voltage, upper voltage limit and lower limit, Ccg
It is critical busses voltage to the idle sensitivity coefficient matrix in each continuously adjustable reactive voltage source, CvgFor control bus voltage pair
The idle sensitivity coefficient matrix in each continuously adjustable reactive voltage source, Δ VH maxFor each control bus voltage maximal regulated
Amount.By each continuously adjustable reactive voltage source (including power grid dynamic passive compensation equipment, grid-connected generation of electricity by new energy factory, grid-connected routine
Hydro, thermal units etc. the are idle continuously adjustable appliance arrangement of power output) sensitivity with busbar voltage, it is obtained by formula (3) and (4)
Each continuously adjustable reactive voltage source state desired value (including be continuously adjusted reactive voltage source idle power output and grid-connected voltage,
It does not include the state desired value in discrete adjustable reactive voltage source).
In the present embodiment, the calculating cycle in step 1) is minute grade, and value range is 1~60 minute, in the present embodiment
The specific value of calculating cycle is 5 minutes.Threshold value in step 2) is 99%.
As shown in Fig. 2, the present embodiment includes: by the power grid automatic voltage control system of target of global optimum
Data acquisition unit, for obtaining power grid real-time status data and state estimation result by calculating cycle；
Central control unit, for carrying out state desired value calculating, if state estimation result is restrained and certified rate of telemetering is big
The power grid in scheduled range is calculated respectively by global optimization method then according to state estimation result in being equal to threshold value
The state desired value in reactive voltage source, the state desired value in each reactive voltage source include continuously adjustable reactive voltage source it is idle go out
State, load tap changer position are thrown or moved back to power and grid-connected voltage, capacitor and reactor；Otherwise, whether each busbar voltage is checked
It is exceeded, if busbar voltage is exceeded, the state desired value in each discrete adjustable reactive voltage source is assigned a value of to be equal to upper one meter
Calculate the state desired value in period, the busbar voltage phase by the busbar voltage desired value of a upper calculating cycle as this calculating cycle
The state phase in each continuously adjustable reactive voltage source is calculated by coordinated secondary voltage control method according to real time data for prestige value
Prestige value；The state desired value in discrete adjustable reactive voltage source includes that state, load tap changer position are thrown or moved back to capacitor and reactor
It sets, and does not include the state desired value in continuously adjustable reactive voltage source；The state desired value in continuously adjustable reactive voltage source includes
The idle power output and grid-connected voltage in continuously adjustable reactive voltage source, and do not include the state expectation in discrete adjustable reactive voltage source
Value；Continuously adjustable reactive voltage source includes power grid dynamic passive compensation equipment, grid-connected generation of electricity by new energy factory, grid-connected conventional hydropower machine
Group, four kinds of fired power generating unit idle continuously adjustable appliance arrangements of contributing；If otherwise busbar voltage is not exceeded, by each reactive voltage source
State desired value be assigned a value of the state desired value equal to a upper calculating cycle；
Control execution unit on the spot, for the state desired value of this calculating cycle to be handed down to respectively with remote regulating or telecommand
Reactive voltage Source Type executes.
As shown in Fig. 2, data acquisition unit is specially SCADA main station system in the present embodiment.
As shown in Fig. 2, central control unit is deployed in dispatching control center as automatism voltage control AVC in the present embodiment
Three-level and secondary voltage control layer in three-stage control system, for being continuously adjusted reactive voltage source, central control unit is by shape
State desired value is issued as remote regulating instruction；For discrete adjustable reactive voltage source, central control unit using state desired value as
Telecommand issues；Control execution unit is deployed in each reactive voltage source on the spot, as automatism voltage control AVC three class control system
Level-one control layer in system executes remote regulating or remote control that central control unit issues under the premise of meeting security boundary condition
Instruction.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of using global optimum as the power grid automatic voltage control method of target, it is characterised in that implementation steps include:
1) power grid real-time status data and state estimation result are obtained by calculating cycle；
If 2) state estimation result is restrained and certified rate of telemetering is more than or equal to threshold value, jumps execution step 3) and otherwise jump
Execute step 4)；
3) according to state estimation result, each reactive voltage source is calculated by global optimization method to the power grid in scheduled range
State desired value, the state desired value in each reactive voltage source includes the idle power output and simultaneously in continuously adjustable reactive voltage source
State, load tap changer position are thrown or moved back to net voltage, capacitor and reactor；It jumps and executes step 7)；
4) check whether each busbar voltage is exceeded, if busbar voltage is exceeded, thens follow the steps 5)；It is no to then follow the steps 6)；
5) the state desired value in each discrete adjustable reactive voltage source is assigned a value of to the state desired value of a upper calculating cycle, is pressed
The busbar voltage desired value of a upper calculating cycle is pressed as the busbar voltage desired value of this calculating cycle according to real time data
The state desired value in each continuously adjustable reactive voltage source is calculated in coordinated secondary voltage control method；It is described discrete adjustable idle
The state desired value of voltage source includes capacitor and reactor throwing or moves back state, load tap changer position, and does not include continuously may be used
Adjust the state desired value in reactive voltage source；The state desired value in the continuously adjustable reactive voltage source includes being continuously adjusted idle electricity
The idle power output and grid-connected voltage of potential source, and do not include the state desired value in discrete adjustable reactive voltage source；It is described continuously adjustable
Reactive voltage source includes power grid dynamic passive compensation equipment, grid-connected generation of electricity by new energy factory, grid-connected conventional hydropower unit, fired power generating unit
Four kinds of idle continuously adjustable appliance arrangements of contributing；It jumps and executes step 7)；
6) the state desired value in each reactive voltage source is assigned a value of to the state desired value of a upper calculating cycle, continues to execute step
It is rapid 7)；
7) the state desired value of this calculating cycle each reactive voltage Source Type is handed down to remote regulating or telecommand to execute.
2. according to claim 1 using global optimum as the power grid automatic voltage control method of target, which is characterized in that step
3) in the power grid in scheduled range by global optimization method be calculated each reactive voltage source state desired value it is detailed
Step includes: using global loss minimization as objective function, above and below grid power balance, voltage bound, active/idle power output
It is limited to boundary condition, is control variable with reactive voltage source state desired value, carries out power grid most by preset on-line optimization algorithm
Excellent Load flow calculation obtains the state desired value in each reactive voltage source.
3. according to claim 2 using global optimum as the power grid automatic voltage control method of target, which is characterized in that described
Shown in the mathematical model such as formula (1) of preset on-line optimization algorithm and (2)；
min f(x) (1)
In formula (1) and (2), x is the state desired value as each reactive voltage source of control variable, including is continuously adjusted idle electricity
State, load tap changer position are thrown or moved back to the idle power output and grid-connected voltage of potential source, capacitor and reactor, and f (x) is target letter
Number, using global loss minimization；G (x) is equation boundary condition, using electric network active/reactive power equilibrium；H (x) is inequality
Boundary condition, hminFor busbar voltage lower limit, idle power output lower limit, hmaxFor bus voltage upper limit, the idle power output upper limit.
4. according to claim 3 using global optimum as the power grid automatic voltage control method of target, which is characterized in that described
Preset on-line optimization algorithm specifically uses prim al- dual interior point m ethod or the inferior method of newton pressgang.
5. according to claim 1 using global optimum as the power grid automatic voltage control method of target, which is characterized in that step
5) detailed step of the state desired value in each continuously adjustable reactive voltage source is calculated in by coordinated secondary voltage control method
It include: with busbar voltage real value and the minimum control target of deviation from the desired value amount, with the shape in each continuously adjustable reactive voltage source
In this calculating cycle of state desired value it is accessible up and down be limited to boundary condition, by all types of busbar voltages to it is each be continuously adjusted it is idle
Preset busbar voltage optimal control method is carried out in the idle sensitivity of voltage source, obtains each continuously adjustable reactive voltage source
State desired value；The all types of busbar voltages include maincenter busbar voltage, critical busses voltage, control bus voltage.
6. according to claim 5 using global optimum as the power grid automatic voltage control method of target, which is characterized in that carry out
Shown in the mathematical model such as formula (3) of preset busbar voltage optimal control method and (4)；
In formula (3) and (4), VpAnd Vp refRespectively maincenter bus real-time voltage and target voltage, CpgIt is maincenter busbar voltage to each
The idle sensitivity coefficient matrix in continuously adjustable reactive voltage source, Δ QgFor the idle adjustment expectation in continuously adjustable reactive voltage source
Value, r and h are weight coefficient, and θ is idle coordination vector；Qg、Qg max、Qg minRespectively continuously adjustable reactive voltage source is currently idle
Power output, idle upper and lower bound, Vc、Vc max、Vc minRespectively critical busses current voltage, upper voltage limit and lower limit, CcgFor key
Idle sensitivity coefficient matrix of the busbar voltage to each continuously adjustable reactive voltage source, CvgIt is control bus voltage to each continuous
The idle sensitivity coefficient matrix in adjustable reactive voltage source, Δ VH maxFor each control bus voltage maximal regulated amount.
7. according to claim 1 using global optimum as the power grid automatic voltage control method of target, which is characterized in that step
1) calculating cycle in is minute grade, and value range is 1~60 minute；Threshold value in step 2) is 99%.
8. a kind of using global optimum as the power grid automatic voltage control system of target, characterized by comprising:
Data acquisition unit, for obtaining power grid real-time status data and state estimation result by calculating cycle；
Central control unit, for carrying out state desired value calculating, if state estimation result convergence and certified rate of telemetering be greater than etc.
In threshold value, then according to state estimation result, the power grid in scheduled range is calculated by global optimization method each idle
The state desired value of voltage source, the state desired value in each reactive voltage source include continuously adjustable reactive voltage source it is idle go out
State, load tap changer position are thrown or moved back to power and grid-connected voltage, capacitor and reactor；Otherwise, whether each busbar voltage is checked
It is exceeded, if busbar voltage is exceeded, the state desired value in each discrete adjustable reactive voltage source is assigned a value of to be equal to upper one meter
Calculate the state desired value in period, the busbar voltage phase by the busbar voltage desired value of a upper calculating cycle as this calculating cycle
The state phase in each continuously adjustable reactive voltage source is calculated by coordinated secondary voltage control method according to real time data for prestige value
Prestige value；The state desired value in the discrete adjustable reactive voltage source includes that state, transformer tap are thrown or moved back to capacitor and reactor
Head position, and do not include the state desired value in continuously adjustable reactive voltage source；The state phase in the continuously adjustable reactive voltage source
Prestige value includes the idle power output and grid-connected voltage in continuously adjustable reactive voltage source, and does not include the shape in discrete adjustable reactive voltage source
State desired value；The continuously adjustable reactive voltage source includes power grid dynamic passive compensation equipment, grid-connected generation of electricity by new energy factory, grid-connected
Conventional hydropower unit, four kinds of fired power generating unit idle continuously adjustable appliance arrangements of contributing；It, will be each if otherwise busbar voltage is not exceeded
The state desired value in reactive voltage source is assigned a value of the state desired value equal to a upper calculating cycle；
Control execution unit on the spot, it is each idle for the state desired value of this calculating cycle to be handed down to remote regulating or telecommand
Voltage Source Type executes.
9. according to claim 8 using global optimum as the power grid automatic voltage control system of target, which is characterized in that described
Data acquisition unit is specially SCADA main station system.
10. according to claim 8 using global optimum as the power grid automatic voltage control system of target, which is characterized in that institute
It states central control unit and is deployed in dispatching control center as the three-level and second level in automatism voltage control AVC three-stage control system
Voltage control layer, for being continuously adjusted reactive voltage source, central control unit is issued state desired value as remote regulating instruction；It is right
In discrete adjustable reactive voltage source, central control unit is issued using state desired value as telecommand；The control on the spot is held
Row unit is deployed in each reactive voltage source, as the level-one control layer in automatism voltage control AVC three-stage control system, is meeting
Under the premise of security boundary condition, remote regulating or telecommand that central control unit issues are executed.
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| CN107834567B (en) * | 2017-11-30 | 2020-11-10 | 国家电网公司西北分部 | Reactive voltage coordination control method for extra-high voltage direct current converter station and near-field power plant |
| CN108110752B (en) * | 2017-12-06 | 2021-03-12 | 中国南方电网有限责任公司 | Day-ahead planning mode reactive power optimization method adaptive to load change of power grid |
| CN109038572B (en) * | 2018-08-30 | 2021-05-07 | 国家电网公司华东分部 | Voltage safety range determination method considering faults of alternating current-direct current hybrid power grid |
| CN109462257B (en) * | 2018-12-10 | 2021-11-02 | 东北电力大学 | Sensitivity identification method considering voltage stability of multivariate random variable power grid |
| CN111509752A (en) * | 2019-01-31 | 2020-08-07 | 国网河南省电力公司 | Dynamic voltage safety assessment method and system for alternating current-direct current hybrid power grid |
| CN110224409A (en) * | 2019-06-12 | 2019-09-10 | 国网江苏省电力有限公司金湖县供电分公司 | A kind of power quality compensator Precise control method based on Voltage Drop amplitude and the double impact factors of power factor |
| CN111463798B (en) * | 2020-04-08 | 2024-02-13 | 长园深瑞继保自动化有限公司 | Power grid voltage fuzzy control method for energy storage coordination control device |
| CN111490551B (en) * | 2020-05-21 | 2023-05-05 | 云南电网有限责任公司大理供电局 | Distributed Newton method-based photovoltaic power generation cluster voltage control method for power distribution network |
| CN111416363B (en) * | 2020-06-08 | 2020-09-25 | 广东电网有限责任公司佛山供电局 | AVC-based voltage regulation effectiveness judgment method and system |
| CN112489350B (en) * | 2020-11-27 | 2022-08-05 | 润建股份有限公司 | Dynamic-optimization bank electricity safety alarm grading method |
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