CN108539751A - A kind of area power grid AVC control methods and system - Google Patents
A kind of area power grid AVC control methods and system 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a kind of area power grid AVC control methods and system, area power grid is divided by the present invention carries out AVC controls by the isolated area of core of 220kV substations；According to priority according to area power grid AVC control targes, judge that region AVC enters 220kV voltage mode controls, 10kV voltage mode controls or the idle control models of 220kV, each pattern and is provided which corresponding Optimal Control Strategy.The present invention considers area power grid feature and present situation, reduce degrees of dependence of the AVC to state estimation result, according to priority by area power grid AVC control targes, realize that the grid-connected new energy power plant of area power grid and the coordination of substation's idle resource control, give full play to grid-connected new energy power plant ability of regulation and control, Switch equipment action frequency is reduced to a certain extent, and is established in traditional AVC system-baseds, it is convenient to carry out.
Description
Technical field
The present invention relates to area power grid automatism voltage control (AVC) technologies, and in particular to a kind of area power grid AVC controlling parties
Method and system give full play to grid-connected new energy power plant ability of regulation and control, consider to reduce and open based on and area power grid feature and present situation
Close class number of equipment action.
Background technology
Automatism voltage control (Automatic Voltage Control, AVC) system is modern power network voltage, without power control
The Major Systems of system improve grid voltage quality, reduce network loss, ensure power grid by the auto-control to electric network reactive-load resource
The high-quality operation of safety economy.The existing power grid in China can be divided into state according to scheduling permission, divide, province and district level Four.Wherein ground level electricity
Net, i.e. area power grid refer to by the administrative 110kV in each department regulation and control center and following voltage class power supply network, including this area
The main transformer of 220kV substations, the part 110kV, 10kV.It is different from provincial and above power grid ring-type, net distribution, area electricity
Centered on substantially each 220kV substations of net, radial distribution, and be not present electromagnetic looped network situation.Therefore area power grid is natively
Centered on each 220kV substations, it is divided into several subregions, and only carried out by 220kV and Above Transmission Lines between all subregion
Electrical link.
Early stage, regional electric network reactive-load regulating measure was relatively single, can only control in power grid Bing Lian electricity Rong reactors switching and
Main transformer tap gear.Existing area power grid automatism voltage control generally uses this ground voltage control+region idle work optimization
Pattern, i.e., first according to place transformer substation voltage, idle situation by nine-zone diagram formulate capacitance reactor switching and main transformer divide
Connector gear variation strategy, further according to the idle situation in place subregion 220kV transforming plant main transformers high-pressure side correct capacitance reactor
Switching strategy.The advantage of this method is that control method is simple, very low to the dependence of Power Network Status Estimation result.
The wind turbine of distributed new power plant, photovoltaic generation group all have idle dynamic regulating power, and are cooperation power grid
Regulating and controlling voltage is configured with the dynamic passive compensations equipment such as a certain number of SVG/SVC again.New energy power plant is idle output adjustment institute
The loss brought adjusts the static reactive resource of idle output with cost much smaller than power grid by Switch equipment action.With big
Amount distributed new power plant is incorporated to area power grid by 110kV, 35kV, 10kV, brings a large amount of excellent idle resource,
It is greatly enriched the idle control measures of area power grid.Existing area power grid automatism voltage control pattern (control of this ground voltage+
Region idle work optimization) it can not effectively play the effects of these idle resources.
If using provincial power network (220kV or more) automatic voltage control method (three class control pattern), although principle
On can give full play to grid-connected power plant and electric network reactive-load resource, but this control method need to rely on Power Network Status Estimation result.And
Area power grid state estimation result accuracy rate and convergence rate can not show a candle to provincial power network, and excessively dependent status estimated result may
Cause voltage control improper.In addition, area power grid AVC control targes are according to priority followed successively by：1) 220kV busbar voltages are not got over
Limit, 2) 10kV busbar voltages are out-of-limit, 3) 220kV main transformers high-pressure side is not idle out-of-limit.
Therefore, there is an urgent need for a kind of practical control method of automatism voltage control (AVC) meeting area power grid present situation and feature,
Consider power grid operation management cost, give full play to grid-connected distributed new power plant regulating and controlling effect, reduces Switch equipment action
The practical control method of number.The existing method for being related to power grid automatism voltage control is many, but it is existing not account for area power grid
Shape, excessively dependent status estimate or do not account for giving full play to grid-connected distributed new power plant regulating and controlling effect, reduce Switch
Number of equipment action.Such as application No. is 201310111454.1 Chinese patent literatures to disclose a kind of nothing based on AVC systems
Work(voltage optimization method and device, method and voltage corrective control modelling are defined using prim al- dual interior point m ethod, branch come handle from
It dissipates, continuous reactive source coordination optimization control problem, excessively dependent status estimated result, and does not consider to reduce Switch equipment action
The target of number；Such as application No. is 201410057500.9 Chinese patent literatures to disclose a kind of area power grid AVC controlling parties
Method considers that historical experience and future trends, the excessive discrete idle resource control device of locking adjustment limit single discrete
Idle resource desired value adjusts number, is not directed to grid-connected power plant's regulating and controlling effect, to reducing power network switch class device action total degree
It does not account for yet；Such as application No. is 201510079849.7 Chinese patent literatures to disclose a kind of control method of AVC systems,
After continuous reactive resource discretization, traversal seeks optimal solution, and heavy dependence state estimation result, also not considering, which reduces Switch, sets
Standby action frequency, and large-scale power grid is traversed to solve and needs a large amount of time.
Invention content
The technical problem to be solved in the present invention：For the above problem of the prior art, a kind of area power grid AVC controls are provided
Method and system, meter and area power grid feature and present situation of the present invention, according to priority by area power grid AVC control targes, Neng Gouchong
Grid-connected new energy power plant ability of regulation and control is waved in distribution, considers to reduce Switch equipment action frequency.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
Area power grid is divided into several phases by a kind of area power grid AVC control methods using 220kV substations as core in advance
Mutual independent region, each region carry out automatism voltage control with the fixed period respectively, and the automatism voltage control
Step includes：
1) whether detection one's respective area 220kV busbar voltages surmount preset first limit threshold values, if surmounting preset first
Limit threshold values, which then redirect, executes step 2), otherwise redirects and executes step 6)；
2) enter 220kV voltage mode controls, whether detection one's respective area 220kV busbar voltages surmount preset second limitation
Threshold values redirects if surmounting preset second limit threshold values and executes step 3), otherwise redirects and executes step 4)；
3) output and the power grid electricity of grid-connected power plant's idle resource are adjusted simultaneously by preset first 220kV voltage control strategies
The switching of container/reactor idle resource redirects and executes step 5)；
4) output that grid-connected power plant's idle resource is individually adjusted by preset 2nd 220kV voltage control strategies, redirects and holds
Row step 5)；
5) preset 3rd 220kV voltage control strategies are pressed and adjusts substation's tap joint position in one's respective area, redirect execution
Step 10)；
6) detection jumps whether 10kV busbar voltages in region surmount preset third limit threshold values one by one, if there are 10kV mothers
Line voltage surmounts third limit threshold values, then redirects and execute step 7), otherwise redirects and executes step 8)；
7) enter 10kV voltage mode controls, press preset 10kV voltage control strategies for out-of-limit 10kV busbares, adjust
Substation's power grid capacitor/switching of reactor idle resource, place transforming plant main transformer tap joint position, adjacent power transformation where section
It stands and grid-connected power plant's idle resource, redirects and execute step 10)；
8) it detects the region and sends whether reactive power surmounts preset 4th limit threshold values outside, if idle work(is sent in the region outside
Rate surmounts the 4th limit threshold values, then turns to execute step 9), otherwise redirect and execute step 10)；
9) enter the idle control models of 220kV, each grid-connected idle money of power plant is adjusted by the idle control strategies of preset 220kV
Source turns to execute step 10)；
10) keep remaining idle resource control desired value constant, the control of this period terminates.
Preferably, in step 3) shown in the function expression such as formula (1) and formula (2) of the first 220kV voltage control strategies；If
Formula (1) and (2) have feasible solution then to issue control instruction by feasible solution, and epicycle automatic electric is voltage-controlled if formula (1) and (2) are without feasible solution
System does not issue control instruction；
min(∑△Qg+∑△Qs) (1)
In formula (1) and formula (2), Δ QgChange desired value, Δ Q for grid-connected power plant's reactive powersTo be thrown by capacitance/reactor
Substation's reactive power variation desired value caused by cutting；CcgFor grid-connected power plant's reactive power, C in regioncsFor the idle work(of substation
Sensitivity coefficient matrix of the rate to region 220kV busbar voltages；If 220kV busbar voltages are more than the first limit threshold values upper valve
Value, Δ V220For the absolute value of the bias of threshold values in current 220kV busbar voltages and the first limit threshold values；If 220kV busbar voltages are small
The threshold values under the first limit threshold values, Δ V220Deviation for threshold values under current 220kV busbar voltages and the first limit threshold values is absolute
Value；△Qg The current adjustable margin value up and down of respectively grid-connected power plant's reactive power；△Qs Respectively substation is idle
The current adjustable margin value up and down of power.
Preferably, in step 4) shown in the function expression such as formula (3) and formula (4) of the 2nd 220kV voltage control strategies；If
Formula (3) and (4) have feasible solution then to issue control instruction by feasible solution, and epicycle automatic electric is voltage-controlled if formula (3) and (4) are without feasible solution
System does not issue control instruction；
min(∑△Qg) (3)
In formula (3) and formula (4), Δ QgChange desired value for grid-connected power plant's reactive power；CcgFor grid-connected power plant in region without
Sensitivity coefficient matrix of the work(power to region 220kV busbar voltages；If 220kV busbar voltages are more than in the first limit threshold values
Threshold values, Δ V220For the absolute value of the bias of threshold values in current 220kV busbar voltages and the first limit threshold values；If 220kV busbar voltages
Less than threshold values under the first limit threshold values, Δ V220Deviation for threshold values under current 220kV busbar voltages and the first limit threshold values is absolute
Value；△Qg The current adjustable margin value up and down of respectively grid-connected power plant's reactive power.
Preferably, the detailed step of the 3rd 220kV voltage control strategies includes in step 5)：
5.1) judge that whether 220kV busbar voltages are true more than threshold values in the first limit threshold values, redirect if setting up and hold
Row step 5.2) otherwise redirects and executes step 5.5)；
5.2) judge that the 10kV busbar voltages in one's respective area more than the first preset ratio are less than the lower valve of third limit threshold values
Whether value is true, is redirected if setting up and executes step 5.3), otherwise redirects and executes step 5.4)；
5.3) one grade of 220kV main transformers tap joint position is lowered, redirects and executes step 5.9)；
5.4) one grade of load tap changer position where lowering the 10kV busbares of the lower threshold values less than third limit threshold values, is jumped
Turn to execute step 5.9)；
5.5) judge that whether 220kV busbar voltages are true less than the lower threshold values of the first limit threshold values, redirect if setting up
Step 5.6) is executed, otherwise redirects and executes step 5.9)；
5.6) judge that the 10kV busbar voltages in one's respective area more than the second preset ratio are more than the upper valve of third limit threshold values
Whether value is true, is redirected if setting up and executes step 5.7), otherwise redirects and executes step 5.8)；
5.7) one grade of up-regulation 220kV main transformers tap joint position, redirects and executes step 5.9)；
5.8) up-regulation turns less than one grade of load tap changer position where the 10kV busbares of the lower threshold values of third limit threshold values
Execute step 5.9)；
5.9) keep remaining load tap changer position of one's respective area constant.
Preferably, in step 7) preset 10kV voltage control strategies it is preferential using local idle resource on the basis of,
Coordination closes on the resource of substation/grid-connected power plant, and detailed implementation steps include：
7.1) if there is the nothing for reducing 10kV voltages in addition to load tap changer in substation where target 10kV busbares
Work(resource is not used, then redirects and execute step 7.2), otherwise redirects and executes step 7.3)；
7.2) execution step is redirected by as little as more uses successively according to not used idle resource history access times
7.6)；
7.3) 3~5 substations of approaching target 10kV busbares or grid-connected electricity are called according to sensitivity sequence successively application
The idle resource of factory redirects if application is the idle resource of substation and executes step 7.4), if application is the nothing of grid-connected power plant
Work(resource then redirects execution step 7.5) and redirects and hold if all substations applied or grid-connected power plant do not allow to call
Row step 7.6)；
7.4) it calculates after calling substation's idle resource by predetermined order, the substation of approaching target 10kV busbares
Whether 10kV busbar voltages can surmount third limit threshold values, if the 10kV busbar voltages of the substation of approaching target 10kV busbares are not
Third limit threshold values can be surmounted, then call substation's idle resource by predetermined order, redirect and execute step 7.6), otherwise do not permit
Perhaps substation's idle resource is called, redirects and executes step 7.3)；
7.5) it calculates after calling grid-connected power plant's idle resource by default step-length, whether one's respective area 220kV busbar voltages can
Surmount whether the first limit threshold values and grid-connected power plant's grid entry point Suo Lian substations 10kV busbar voltages can surmount third limitation valve
Value, if one's respective area 220kV busbar voltages will not surmount the first limit threshold values and grid-connected power plant's grid entry point Suo Lian substation 10kV
Busbar voltage will not surmount third limit threshold values, then call grid-connected power plant's idle resource by default step-length, redirect execution step
7.6), otherwise do not allow to call grid-connected power plant's idle resource, redirect and execute step 7.3)；
7.6) the 10kV voltage control strategies for being directed to target 10kV busbares terminate.
Preferably, in step 9) shown in the function expression such as formula (5) and formula (6) of the preset idle control strategies of 220kV；
Control instruction is issued by feasible solution if formula (5) and formula (6) have feasible solution, if formula (5) and formula (6) are automatic without feasible solution epicycle
Voltage control does not issue control instruction；
min(∑△Qg) (5)
In formula (5) and formula (6), Δ QgChange desired value for grid-connected power plant's reactive power；Ccg、C'cgRespectively in region simultaneously
Net power plant's reactive power sends region 220kV busbar voltages and region outside the sensitivity coefficient matrix of reactive power, C "cgFor area
Sensitivity coefficient of the grid-connected power plant's reactive power to respective grid entry point Suo Lian substations 10kV busbar voltages in domain；V220For this
Region 220kV busbar voltages, V10For the respective grid entry point Suo Lian substations 10kV busbar voltages of grid-connected power plant in region；If outside region
Reactive power is sent to be more than threshold values in the 4th limit threshold values, Δ Q220It is sent outside in reactive power and the 4th limit threshold values for current region
The absolute value of the bias of threshold values；If region sends reactive power outside less than threshold values under the 4th limit threshold values, Δ Q220It is sent outside for current region
The absolute value of the bias of reactive power and threshold values under the 4th limit threshold values；△Qg Respectively grid-connected power plant's reactive power is current
Adjustable margin value up and down.
Preferably, described when area power grid being divided into several mutually independent regions as core using 220kV substations, it draws
Divide principle as follows：S1) if two 220kV busbar paired runnings of certain 220kV substation, by the electricity of 220kV substations radiation
Net divides region；S2) if two 220kV busbar fanout operations of certain 220kV substation, by the respective spoke of this two 220kV busbares
The power grid penetrated divides respective region；S3) each grid-connected power plant in area power grid, cut-in and its grid entry point Suo Lian substations location
Domain.
The present invention goes back a kind of area power grid AVC control systems of body, including computer equipment, the computer equipment are compiled
The step of journey executed area power grid AVC control methods of the present invention.
Compared to the prior art, the present invention has following advantageous effects：The characteristics of present invention is according to area power grid, will be regional
Power grid is divided into several mutual indepedent regions using 220kV substations as core, respectively carries out AVC controls；It is not relying on excessively
Under the premise of regional state estimation result, according to priority according to area power grid AVC control targes, judge that region AVC enters
220kV voltage mode controls, 10kV voltage mode controls or the idle control models of 220kV, each pattern are provided which corresponding excellent
Change control strategy；The idle control desired value of grid-connected new energy power plant is preferentially adjusted in Optimal Control Strategy as much as possible, with abundant
Grid-connected power plant's ability of regulation and control is played, and reduces Switch equipment action frequency.The present invention considers area power grid feature and present situation,
Reduce degrees of dependence of the AVC to state estimation result；According to priority by area power grid AVC control targes, area power grid is realized
Grid-connected new energy power plant and the coordination of substation's idle resource control；Grid-connected new energy power plant ability of regulation and control is given full play to, centainly
Switch equipment action frequency is reduced in degree；Control method is established in traditional area power grid AVC system-baseds, without increasing
New system and hardware meets area power grid AVC control targe principles, convenient to carry out.
Description of the drawings
Fig. 1 is the basic procedure schematic diagram of present invention method.
Specific implementation mode
If area power grid is divided into using 220kV substations as core by the present embodiment area power grid AVC control methods in advance
Mutually independent region is done, each region carries out automatism voltage control with the fixed period respectively.In the present embodiment, with
When 220kV substations are that area power grid is divided into several mutually independent regions by core, division principle is as follows：S1) if certain
Two 220kV busbar paired runnings of 220kV substations, the then power grid for pressing 220kV substations radiation divide region；S2) if certain
Two 220kV busbar fanout operations of 220kV substations then divide respective area by the power grid that this two 220kV busbares respectively radiate
Domain；S3) each grid-connected power plant in area power grid, cut-in and its grid entry point Suo Lian substations region.
It should be noted that when different regions carries out automatism voltage control with the fixed period, the week in different regions
Phase can regulate and control demand according to Regional Network Voltage/Var and determine, generally 5 minutes.
As shown in Figure 1, including the step of automatism voltage control in the present embodiment：
1) whether detection one's respective area 220kV busbar voltages surmount preset first limit threshold values, if surmounting preset first
Limit threshold values, which then redirect, executes step 2), otherwise redirects and executes step 6)；
2) enter 220kV voltage mode controls, whether detection one's respective area 220kV busbar voltages surmount preset second limitation
Threshold values redirects if surmounting preset second limit threshold values and executes step 3), otherwise redirects and executes step 4)；
3) output and the power grid electricity of grid-connected power plant's idle resource are adjusted simultaneously by preset first 220kV voltage control strategies
The switching of container/reactor idle resource redirects and executes step 5)；
4) output that grid-connected power plant's idle resource is individually adjusted by preset 2nd 220kV voltage control strategies, redirects and holds
Row step 5)；
5) preset 3rd 220kV voltage control strategies are pressed and adjusts substation's tap joint position in one's respective area, redirect execution
Step 10)；
6) detection jumps whether 10kV busbar voltages in region surmount preset third limit threshold values one by one, if there are 10kV mothers
Line voltage surmounts third limit threshold values, then redirects and execute step 7), otherwise redirects and executes step 8)；
7) enter 10kV voltage mode controls, press preset 10kV voltage control strategies for out-of-limit 10kV busbares, adjust
Substation's power grid capacitor/switching of reactor idle resource, place transforming plant main transformer tap joint position, adjacent power transformation where section
It stands and grid-connected power plant's idle resource, redirects and execute step 10)；
8) it detects the region and sends whether reactive power surmounts preset 4th limit threshold values outside, if idle work(is sent in the region outside
Rate surmounts the 4th limit threshold values, then turns to execute step 9), otherwise redirect and execute step 10)；
9) enter the idle control models of 220kV, each grid-connected idle money of power plant is adjusted by the idle control strategies of preset 220kV
Source turns to execute step 10)；
10) keep remaining idle resource control desired value constant, the control of this period terminates.
In the present embodiment, the first limit threshold values in step 1) include upper and lower threshold values, female with reference to desired 220kV respectively
Line voltage interval of acceptance upper and lower limit, and there are certain nargin, the upper and lower nargin of the first limit threshold values is generally set as 1kV；It is different
220kV busbares, different time sections, the values of the first limit threshold values is different, and generally upper threshold values is 229~230kV, and lower threshold values is
224kV；If 220kV busbar voltages are more than threshold values in the first limit threshold values or are less than threshold values under the first limit threshold values, then it is assumed that
220kV busbar voltages surmount preset first limit threshold values.
In the present embodiment, the second limit threshold values in step 2) include upper and lower threshold values, and it is as follows to calculate function expression：
In above formula, V2 The upper and lower threshold values of respectively the second limit threshold values, V1 Respectively 1 upper and lower valve of limit threshold values
Value, CcgIt is grid-connected power plant's reactive power in region to the sensitivity coefficient matrix of region 220kV busbar voltages,△Qg
The current adjustable margin value up and down of respectively grid-connected power plant's reactive power, μThe upper and lower margin value of respectively the second limit threshold values, one
As be set as 1kV；If 220kV busbar voltages are more than threshold values in the second limit threshold values or are less than threshold values under the second limit threshold values,
Think that 220kV busbar voltages surmount preset second limit threshold values.
In the present embodiment, the function expression such as formula (1) of the first 220kV voltage control strategies and formula (2) institute in step 3)
Show；Control instruction is issued by feasible solution if formula (1) and (2) have feasible solution, if formula (1) and (2) are automatic without feasible solution epicycle
Voltage control does not issue control instruction；
min(∑△Qg+∑△Qs) (1)
In formula (1) and formula (2), Δ QgChange desired value, Δ Q for grid-connected power plant's reactive powersTo be thrown by capacitance/reactor
Substation's reactive power variation desired value caused by cutting；CcgFor grid-connected power plant's reactive power, C in regioncsFor the idle work(of substation
Sensitivity coefficient matrix of the rate to region 220kV busbar voltages；If 220kV busbar voltages are more than the first limit threshold values upper valve
Value, Δ V220For the absolute value of the bias of threshold values in current 220kV busbar voltages and the first limit threshold values；If 220kV busbar voltages are small
The threshold values under the first limit threshold values, Δ V220Deviation for threshold values under current 220kV busbar voltages and the first limit threshold values is absolute
Value；△Qg The current adjustable margin value up and down of respectively grid-connected power plant's reactive power；△Qs Respectively substation is idle
The current adjustable margin value up and down of power.
In the present embodiment, the function expression such as formula (3) of the 2nd 220kV voltage control strategies and formula (4) institute in step 4)
Show；Control instruction is issued by feasible solution if formula (3) and (4) have feasible solution, if formula (3) and (4) are automatic without feasible solution epicycle
Voltage control does not issue control instruction；
min(∑△Qg) (3)
In formula (3) and formula (4), Δ QgChange desired value for grid-connected power plant's reactive power；CcgFor grid-connected power plant in region without
Sensitivity coefficient matrix of the work(power to region 220kV busbar voltages；If 220kV busbar voltages are more than in the first limit threshold values
Threshold values, Δ V220For the absolute value of the bias of threshold values in current 220kV busbar voltages and the first limit threshold values；If 220kV busbar voltages
Less than threshold values under the first limit threshold values, Δ V220Deviation for threshold values under current 220kV busbar voltages and the first limit threshold values is absolute
Value；△Qg The current adjustable margin value up and down of respectively grid-connected power plant's reactive power.
In the present embodiment, the detailed step of the 3rd 220kV voltage control strategies includes in step 5)：
5.1) judge that whether 220kV busbar voltages are true more than threshold values in the first limit threshold values, redirect if setting up and hold
Row step 5.2) otherwise redirects and executes step 5.5)；
5.2) judge that the 10kV busbar voltages in one's respective area more than the first preset ratio are less than the lower valve of third limit threshold values
Whether value is true, is redirected if setting up and executes step 5.3), otherwise redirects and executes step 5.4)；In the present embodiment, first is pre-
If ratio value is 40%；
5.3) one grade of 220kV main transformers tap joint position is lowered, redirects and executes step 5.9)；
5.4) one grade of load tap changer position where lowering the 10kV busbares of the lower threshold values less than third limit threshold values, is jumped
Turn to execute step 5.9)；
5.5) judge that whether 220kV busbar voltages are true less than the lower threshold values of the first limit threshold values, redirect if setting up
Step 5.6) is executed, otherwise redirects and executes step 5.9)；
5.6) judge that the 10kV busbar voltages in one's respective area more than the second preset ratio are more than the upper valve of third limit threshold values
Whether value is true, is redirected if setting up and executes step 5.7), otherwise redirects and executes step 5.8)；In the present embodiment, second is pre-
If ratio value as first the first preset ratio of preset ratio is 40%；
5.7) one grade of up-regulation 220kV main transformers tap joint position, redirects and executes step 5.9)；
5.8) up-regulation turns less than one grade of load tap changer position where the 10kV busbares of the lower threshold values of third limit threshold values
Execute step 5.9)；
5.9) keep remaining load tap changer position of one's respective area constant.
In the present embodiment, preset third limit threshold values include upper and lower threshold values in step 6), respectively with reference to desired 10kV
Busbar voltage interval of acceptance upper and lower limit, and there are certain nargin；The upper and lower nargin of third limit threshold values is generally set as 0.05kV；
Different 10kV busbares, different time sections, third limit threshold values are different, and generally upper threshold values is 10.6~10.95kV, and lower threshold values is
9.5~10.15kV；If 10kV busbar voltages are more than threshold values in third limit threshold values or are less than threshold values under third limit threshold values,
Think that 10kV busbar voltages surmount preset third limit threshold values.
In the present embodiment, preset 10kV voltage control strategies are on the preferential basis using local idle resource in step 7)
On, coordinate the resource for closing on substation/grid-connected power plant, detailed implementation steps include：
7.1) if there is the nothing for reducing 10kV voltages in addition to load tap changer in substation where target 10kV busbares
Work(resource is not used, then redirects and execute step 7.2), otherwise redirects and executes step 7.3)；
7.2) execution step is redirected by as little as more uses successively according to not used idle resource history access times
7.6)；
7.3) 3~5 substations of approaching target 10kV busbares or grid-connected electricity are called according to sensitivity sequence successively application
The idle resource of factory redirects if application is the idle resource of substation and executes step 7.4), if application is the nothing of grid-connected power plant
Work(resource then redirects execution step 7.5) and redirects and hold if all substations applied or grid-connected power plant do not allow to call
Row step 7.6)；
7.4) it calculates after calling substation's idle resource by predetermined order, the substation of approaching target 10kV busbares
Whether 10kV busbar voltages can surmount third limit threshold values, if the 10kV busbar voltages of the substation of approaching target 10kV busbares are not
Third limit threshold values can be surmounted, then call substation's idle resource by predetermined order, redirect and execute step 7.6), otherwise do not permit
Perhaps substation's idle resource is called, redirects and executes step 7.3)；
7.5) it calculates after calling grid-connected power plant's idle resource by default step-length, whether one's respective area 220kV busbar voltages can
Surmount whether the first limit threshold values and grid-connected power plant's grid entry point Suo Lian substations 10kV busbar voltages can surmount third limitation valve
Value, if one's respective area 220kV busbar voltages will not surmount the first limit threshold values and grid-connected power plant's grid entry point Suo Lian substation 10kV
Busbar voltage will not surmount third limit threshold values, then call grid-connected power plant's idle resource by default step-length, redirect execution step
7.6), otherwise do not allow to call grid-connected power plant's idle resource, redirect and execute step 7.3)；
7.6) the 10kV voltage control strategies for being directed to target 10kV busbares terminate.
In the present embodiment, preset 4th limit threshold values include upper and lower threshold values in step 8), respectively with reference to the desired area
It is overseas to send Reactive Power Control section upper and lower limit, and there are certain nargin；If the region only has a 220kV main transformer, the region
It is the 220kV main transformers high-pressure side reactive power value to send reactive power outside；If there are a more 220kV main transformers in the region, outside the region
It is these 220kV main transformers high-pressure side reactive power total values to send reactive power；Different zones, different time sections, the 4th limitation
Threshold values is different；If the region sends reactive power outside more than threshold values in the 4th limit threshold values or is less than threshold values under the 4th limit threshold values,
Then think that the region sends reactive power outside and surmounts preset 4th limit threshold values.
In the present embodiment, the function expression such as formula (5) and formula (6) of the preset idle control strategies of 220kV in step 9)
It is shown；Control instruction is issued by feasible solution if formula (5) and formula (6) have feasible solution, if formula (5) and formula (6) are without feasible solution sheet
Wheel automatism voltage control does not issue control instruction；
min(∑△Qg) (5)
In formula (5) and formula (6), Δ QgChange desired value for grid-connected power plant's reactive power；Ccg、C'cgRespectively in region simultaneously
Net power plant's reactive power sends region 220kV busbar voltages and region outside the sensitivity coefficient matrix of reactive power, C "cgFor area
Sensitivity coefficient of the grid-connected power plant's reactive power to respective grid entry point Suo Lian substations 10kV busbar voltages in domain；V220For this
Region 220kV busbar voltages, V10For the respective grid entry point Suo Lian substations 10kV busbar voltages of grid-connected power plant in region；If outside region
Reactive power is sent to be more than threshold values in the 4th limit threshold values, Δ Q220It is sent outside in reactive power and the 4th limit threshold values for current region
The absolute value of the bias of threshold values；If region sends reactive power outside less than threshold values under the 4th limit threshold values, Δ Q220It is sent outside for current region
The absolute value of the bias of reactive power and threshold values under the 4th limit threshold values；△Qg Respectively grid-connected power plant's reactive power is current
Adjustable margin value up and down.
In conclusion the characteristics of aforementioned area power grid AVC control methods of the present embodiment are according to area power grid, by area power grid
Several mutual indepedent regions using 220kV substations as core are divided into, AVC controls are respectively carried out；In not excessively dependency range
Under the premise of regional state estimation result, according to priority according to area power grid AVC control targes, judge that region AVC enters
220kV voltage mode controls, 10kV voltage mode controls or the idle control models of 220kV, each pattern are provided which corresponding excellent
Change control strategy；The idle control desired value of grid-connected new energy power plant is preferentially adjusted in Optimal Control Strategy as much as possible, with abundant
Grid-connected power plant's ability of regulation and control is played, and reduces Switch equipment action frequency.The present invention considers area power grid feature and present situation,
Degrees of dependence of the AVC to state estimation result is reduced, according to priority by area power grid AVC control targes, realizes area power grid
Grid-connected new energy power plant and the coordination of substation's idle resource control, and give full play to grid-connected new energy power plant ability of regulation and control, centainly
Switch equipment action frequency is reduced in degree, and is established in traditional AVC system-baseds, it is convenient to carry out.
The present embodiment also provides a kind of area power grid AVC control systems, including computer equipment, the computer equipment quilt
The step of programming executed the present embodiment aforementioned area power grid AVC control methods.
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 (8)
1. a kind of area power grid AVC control methods, which is characterized in that in advance draw area power grid using 220kV substations as core
It is divided into several mutually independent regions, each region carries out automatism voltage control with the fixed period respectively, and described automatic
Voltage-controlled step includes：
1) whether detection one's respective area 220kV busbar voltages surmount preset first limit threshold values, if surmounting preset first limitation
Threshold values, which then redirects, executes step 2), otherwise redirects and executes step 6)；
2) enter 220kV voltage mode controls, whether detection one's respective area 220kV busbar voltages surmount preset second limitation valve
Value redirects if surmounting preset second limit threshold values and executes step 3), otherwise redirects and executes step 4)；
3) output and the power grid capacitance of grid-connected power plant's idle resource are adjusted simultaneously by preset first 220kV voltage control strategies
The switching of device/reactor idle resource redirects and executes step 5)；
4) output that grid-connected power plant's idle resource is individually adjusted by preset 2nd 220kV voltage control strategies, redirects and executes step
It is rapid 5)；
5) preset 3rd 220kV voltage control strategies are pressed and adjusts substation's tap joint position in one's respective area, redirect execution step
10)；
6) detection jumps whether 10kV busbar voltages in region surmount preset third limit threshold values one by one, if there are 10kV busbar electricity
Pressure surmounts third limit threshold values, then redirects and execute step 7), otherwise redirects and executes step 8)；
7) enter 10kV voltage mode controls, press preset 10kV voltage control strategies for out-of-limit 10kV busbares, adjust institute
The switching of substation's power grid capacitor/reactor idle resource, place transforming plant main transformer tap joint position, adjacent substations and
Grid-connected power plant's idle resource redirects and executes step 10)；
8) it detects the region and sends whether reactive power surmounts preset 4th limit threshold values outside, if the region is sent reactive power outside and surpassed
More the 4th limit threshold values then turn to execute step 9), otherwise redirect and execute step 10)；
9) enter the idle control models of 220kV, each grid-connected power plant's idle resource adjusted by the idle control strategies of preset 220kV,
Turn to execute step 10)；
10) keep remaining idle resource control desired value constant, the control of this period terminates.
2. area power grid AVC control methods according to claim 1, which is characterized in that the first 220kV voltages in step 3)
Shown in the function expression of control strategy such as formula (1) and formula (2)；If formula (1) and (2) have feasible solution control is issued by feasible solution
Instruction, epicycle automatism voltage control does not issue control instruction if formula (1) and (2) are without feasible solution；
min(∑△Qg+∑△Qs) (1)
In formula (1) and formula (2), Δ QgChange desired value, Δ Q for grid-connected power plant's reactive powersTo be led by capacitance/reactor switching
Substation's reactive power of cause changes desired value；CcgFor grid-connected power plant's reactive power, C in regioncsFor substation's reactive power pair
The sensitivity coefficient matrix of region 220kV busbar voltages；If 220kV busbar voltages are more than threshold values in the first limit threshold values, Δ
V220For the absolute value of the bias of threshold values in current 220kV busbar voltages and the first limit threshold values；If 220kV busbar voltages are less than the
Threshold values under one limit threshold values, Δ V220For the absolute value of the bias of threshold values under current 220kV busbar voltages and the first limit threshold values；△Qg The current adjustable margin value up and down of respectively grid-connected power plant's reactive power；△Qs The respectively idle work(of substation
The current adjustable margin value up and down of rate.
3. area power grid AVC control methods according to claim 1, which is characterized in that the 2nd 220kV voltages in step 4)
Shown in the function expression of control strategy such as formula (3) and formula (4)；If formula (3) and (4) have feasible solution control is issued by feasible solution
Instruction, epicycle automatism voltage control does not issue control instruction if formula (3) and (4) are without feasible solution；
min(∑△Qg) (3)
In formula (3) and formula (4), Δ QgChange desired value for grid-connected power plant's reactive power；CcgFor the idle work(of grid-connected power plant in region
Sensitivity coefficient matrix of the rate to region 220kV busbar voltages；If 220kV busbar voltages are more than the first limit threshold values upper valve
Value, Δ V220For the absolute value of the bias of threshold values in current 220kV busbar voltages and the first limit threshold values；If 220kV busbar voltages are small
The threshold values under the first limit threshold values, Δ V220Deviation for threshold values under current 220kV busbar voltages and the first limit threshold values is absolute
Value；△Qg The current adjustable margin value up and down of respectively grid-connected power plant's reactive power.
4. area power grid AVC control methods according to claim 1, which is characterized in that the 3rd 220kV voltages in step 5)
The detailed step of control strategy includes：
5.1) judge that whether 220kV busbar voltages are true more than threshold values in the first limit threshold values, redirect if setting up and execute step
It is rapid 5.2), otherwise redirect execute step 5.5)；
5.2) judging the lower threshold values that the 10kV busbar voltages in one's respective area more than the first preset ratio are less than third limit threshold values is
No establishment redirects if setting up and executes step 5.3), otherwise redirects and executes step 5.4)；
5.3) one grade of 220kV main transformers tap joint position is lowered, redirects and executes step 5.9)；
5.4) one grade of load tap changer position where lowering the 10kV busbares of the lower threshold values less than third limit threshold values, redirects and holds
Row step 5.9)；
5.5) judge that whether 220kV busbar voltages are true less than the lower threshold values of the first limit threshold values, and execution is redirected if setting up
Step 5.6) otherwise redirects and executes step 5.9)；
5.6) judging the upper threshold values that the 10kV busbar voltages in one's respective area more than the second preset ratio are more than third limit threshold values is
No establishment redirects if setting up and executes step 5.7), otherwise redirects and executes step 5.8)；
5.7) one grade of up-regulation 220kV main transformers tap joint position, redirects and executes step 5.9)；
5.8) up-regulation turns to execute less than one grade of load tap changer position where the 10kV busbares of the lower threshold values of third limit threshold values
Step 5.9)；
5.9) keep remaining load tap changer position of one's respective area constant.
5. area power grid AVC control methods according to claim 1, which is characterized in that preset 10kV electricity in step 7)
It presses control strategy on the basis of the preferential idle resource using local, coordinates the resource for closing on substation/grid-connected power plant, in detail
Implementation steps include：
7.1) if there is the idle money for reducing 10kV voltages in addition to load tap changer in substation where target 10kV busbares
Source is not used, then redirects and execute step 7.2), otherwise redirects and executes step 7.3)；
7.2) it according to not used idle resource history access times by as little as more uses successively, redirects and executes step 7.6)；
7.3) according to 3~5 substations or grid-connected power plant of sensitivity sequence successively application calling approaching target 10kV busbares
Idle resource redirects if application is the idle resource of substation and executes step 7.4), if application is the idle money of grid-connected power plant
Source then redirects execution step 7.5) and redirects if all substations applied or grid-connected power plant do not allow to call and execute step
It is rapid 7.6)；
7.4) it calculates after calling substation's idle resource by predetermined order, the 10kV of the substation of approaching target 10kV busbares
Whether busbar voltage can surmount third limit threshold values, if the 10kV busbar voltages of the substation of approaching target 10kV busbares will not surpass
More third limit threshold values then call substation's idle resource by predetermined order, redirect and execute step 7.6), otherwise do not allow to adjust
With substation's idle resource, redirects and execute step 7.3)；
7.5) it calculates after calling grid-connected power plant's idle resource by default step-length, whether one's respective area 220kV busbar voltages can surmount
Whether the first limit threshold values and grid-connected power plant's grid entry point Suo Lian substations 10kV busbar voltages can surmount third limit threshold values, if
One's respective area 220kV busbar voltages will not surmount the first limit threshold values and grid-connected power plant's grid entry point Suo Lian substations 10kV busbares electricity
Pressure will not surmount third limit threshold values, then call grid-connected power plant's idle resource by default step-length, redirect and execute step 7.6), no
Do not allow then to call grid-connected power plant's idle resource, redirects and execute step 7.3)；
7.6) the 10kV voltage control strategies for being directed to target 10kV busbares terminate.
6. area power grid AVC control methods according to claim 1, which is characterized in that in step 9) preset 220kV without
Shown in the function expression of work(control strategy such as formula (5) and formula (6)；It is issued by feasible solution if formula (5) and formula (6) have feasible solution
Control instruction, epicycle automatism voltage control does not issue control instruction if formula (5) and formula (6) are without feasible solution；
min(∑△Qg) (5)
In formula (5) and formula (6), Δ QgChange desired value for grid-connected power plant's reactive power；Ccg、C'cgGrid-connected electricity respectively in region
Factory's reactive power sends region 220kV busbar voltages and region outside the sensitivity coefficient matrix of reactive power, C "cgFor in region
Sensitivity coefficient of the grid-connected power plant's reactive power to respective grid entry point Suo Lian substations 10kV busbar voltages；V220For the region
220kV busbar voltages, V10For the respective grid entry point Suo Lian substations 10kV busbar voltages of grid-connected power plant in region；If nothing is sent in region outside
Work(power is more than threshold values in the 4th limit threshold values, Δ Q220Reactive power and threshold values in the 4th limit threshold values are sent outside for current region
Absolute value of the bias；If region sends reactive power outside less than threshold values under the 4th limit threshold values, Δ Q220It is sent outside for current region idle
The absolute value of the bias of threshold values under power and the 4th limit threshold values；△Qg Respectively grid-connected power plant's reactive power is currently adjustable
Upper and lower margin value.
7. the area power grid AVC control methods according to any one of claim 1~6, which is characterized in that it is described with
When 220kV substations are that area power grid is divided into several mutually independent regions by core, division principle is as follows：S1) if certain
Two 220kV busbar paired runnings of 220kV substations, the then power grid for pressing 220kV substations radiation divide region；S2) if certain
Two 220kV busbar fanout operations of 220kV substations then divide respective area by the power grid that this two 220kV busbares respectively radiate
Domain；S3) each grid-connected power plant in area power grid, cut-in and its grid entry point Suo Lian substations region.
8. a kind of area power grid AVC control systems, including computer equipment, it is characterised in that：The computer equipment is programmed
The step of any one of executed claim 1~7 area power grid AVC control methods.
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