CN109193688A - The discrete reactive apparatus day action frequency setting method in monotropic power station and device - Google Patents
The discrete reactive apparatus day action frequency setting method in monotropic power station and device Download PDFInfo
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- CN109193688A CN109193688A CN201811093588.4A CN201811093588A CN109193688A CN 109193688 A CN109193688 A CN 109193688A CN 201811093588 A CN201811093588 A CN 201811093588A CN 109193688 A CN109193688 A CN 109193688A
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- 238000004260 weight control Methods 0.000 claims description 7
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- 230000003044 adaptive effect Effects 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 28
- 238000004590 computer program Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- 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
Abstract
The invention discloses a kind of discrete reactive apparatus day action frequency setting method in monotropic power station and devices, this method requires the deviation of the reactive requirement amount of discrete reactive apparatus and power grid minimum in objective function, the deviation by the time span of the period it is adaptive processing is weighted to deviation, objective function another part is made of the least limit value of action frequency, to reduce control cost, in constraint, guarantee in each Time segments division section, the reactive requirement of its idle system that is able to satisfy of contributing in the total action frequency limit value of contributing of discrete reactive apparatus, the discrete reactive apparatus singly stood can be obtained in the action frequency of different periods by solving the integer programming model.The method of the present invention principle is simple, and it is convenient to solve, and has very strong engineering practicability.
Description
Technical field
The present invention relates to a kind of discrete reactive apparatus day work times setting method in monotropic power station and devices, are suitable for electric power
Regulator control system belongs to operation and control of electric power system technical field.
Background technique
Voltage power-less regulation by years of researches reached its maturity and be widely used in actual electric network control and achieve compared with
Good effect.Increasingly complicated, the single transforming plant voltage reactive of continuous expansion and load variations however as power grid scale
Often will appear in regulation leads to optimize the undesirable phenomenon of operational effect since parameter setting is unreasonable, traces it to its cause mainly
Operations staff is difficult to accurately hold the reasonable setting of parameter, among these especially with reactive-load compensation equipments such as the discrete reactive sources such as capacitor
Action frequency determine it is the most difficult.
Method of the current method mostly based on artificial experience setting, can not catch load variations principal contradiction, and setting is thick
It is rough, there is no specific aim to load, causes in most cases without the discrete reactive source such as controllable capacitor.
By retrieval, at home still single transforming plant voltage reactive regulation in number of equipment action be arranged paced beat
Draw the patent of model.
Summary of the invention
It is dynamic it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of monotropic power station discrete reactive apparatus day
Make number setting method and device, action frequency of the discrete reactive apparatus singly stood in different periods, this method original can be obtained
Reason is simple, and it is convenient to solve, and has very strong engineering practicability.
In order to solve the above technical problems, the present invention provides a kind of monotropic discrete reactive apparatus day action frequency settings in power station
Method specifically includes following procedure:
S1, according to substation's day Time segments division as a result, determining the active power of starting point and end point in each period
Active power；
S2 determines nothing in each period according to the active power of starting point in each period and the active power of end point
Function demand；
S3 calculates the capacity of corresponding discrete reactive apparatus of each period；
S4, establish with the deviation of the capacity of discrete reactive apparatus in all periods and reactive requirement is minimum and equipment it is dynamic
Make number at least and be the objective function of target；
S5 solves above-mentioned objective function and obtains the action frequency of each period, obtains day total action frequency.
Preferably, the corresponding discrete reactive apparatus action frequency of any time period is an integer variable.
Preferably, in S2, reactive requirement in the i-th periodWherein, i=1,2 ... N；
N is substation day Time segments division quantity, and α is adjustment factor, pstart_iFor the active power of starting point in the i-th period, pend_iFor
The active power of end point in i-th period.
Preferably, adjustment factor α value range is 1 < α < 1.5.
Preferably, in S4, objective function expression formula are as follows:
s.t ki*Qi>Qi0+γ
Wherein, TiFor the i-th slot start time, Ti+1For the i-th end time period, QiFor the i-th period corresponding discrete nothing
The capacity of function equipment, Qi0Reactive requirement in i-th period, kiThe action frequency distributed, (T are needed for the i-th periodi+1-Ti)2*(ki*
Qi-Qi0)2The target of item is Ti~Ti+1The deviation of the reactive requirement amount of the capacity of discrete reactive apparatus and power grid is minimum in period,
ki 2Indicate be equipment action frequency it is minimum, λ is weight control coefrficient, and λ > 0, γ are nargin control coefrficient, γ > 0；
Constraint condition ki*Qi>Qi0+ γ is to guarantee in each Time segments division section, and the total of discrete reactive apparatus goes out
The reactive requirement of its idle system that is able to satisfy of contributing in power action frequency limit value.
Correspondingly, according to above-mentioned method, the present invention also provides a kind of monotropic discrete reactive apparatus day action frequencies in power station
Device is set, comprising:
Period parameters determining module, for according to substation's day Time segments division as a result, determining starting point in each period
The active power of active power and end point；
Reactive requirement computing module, for according to the active power of starting point in each period and the wattful power of end point
Rate determines reactive requirement in each period；
Reactive apparatus capacity calculation module, for calculating the capacity of corresponding discrete reactive apparatus of each period；
Objective function establishes module, for establishing with the inclined of the capacity of reactive apparatus discrete in all periods and reactive requirement
Poor minimum and equipment action frequency is at least the objective function of target；
Action frequency computing module obtains the action frequency of each period for solving above-mentioned objective function, it is total to obtain day
Action frequency.
Preferably, in reactive requirement computing module, reactive requirement in the i-th periodWherein, i
=1,2 ... N；N is substation day Time segments division quantity, and α is adjustment factor, pstart_iHave for starting point in the i-th period
Function power, pend_iFor the active power of end point in the i-th period.
Preferably, adjustment factor α value range is 1 < α < 1.5.
Preferably, objective function is established in module, objective function expression formula are as follows:
s.t ki*Qi>Qi0+γ
Wherein, TiFor the i-th slot start time, Ti+1For the i-th end time period, QiFor the i-th period corresponding discrete nothing
The capacity of function equipment, Qi0Reactive requirement in i-th period, kiThe action frequency distributed, (T are needed for the i-th periodi+1-Ti)2*(ki*
Qi-Qi0)2The target of item is Ti~Ti+1The deviation of the reactive requirement amount of the capacity of discrete reactive apparatus and power grid is minimum in period,
ki 2Indicate be equipment action frequency it is minimum, λ is weight control coefrficient, and λ > 0, γ are nargin control coefrficient, γ > 0；
Constraint condition ki*Qi>Qi0+ γ is to guarantee in each Time segments division section, and the total of discrete reactive apparatus goes out
The reactive requirement of its idle system that is able to satisfy of contributing in power action frequency limit value.
Correspondingly, the present invention also provides a kind of computer readable storage medium for storing one or more programs, it is special
Sign is, one or more of programs include instruction, described instruction when executed by a computing apparatus so that the calculating equipment is held
The above-mentioned method of row.
Compared with prior art, the beneficial effects obtained by the present invention are as follows being: the method for the present invention required in objective function from
The deviation for dissipating the reactive requirement amount of reactive apparatus and power grid is minimum, the deviation by the time span of the period it is adaptive to inclined
Difference is weighted processing, and objective function another part is made of the least limit value of action frequency, so that control cost is reduced,
In constraint, guarantee in each Time segments division section, its idle power output in the total action frequency limit value of contributing of discrete reactive apparatus
It is able to satisfy the reactive requirement of system, the discrete reactive apparatus singly stood can be obtained when different by solving the integer programming model
The action frequency of section, this method principle is simple, and it is convenient to solve, and has very strong engineering practicability.
Specific embodiment
The invention will be further described below.Following embodiment is only used for clearly illustrating technical side of the invention
Case, and not intended to limit the protection scope of the present invention.
The discrete reactive source of capacitor/reactor is as a kind of widely used reactive-load compensation equipment, to support whole network voltage
It is idle, guarantee that safety and economy play an important role.However due to being influenced by the factors such as insulate, day movement time
Number is to receive stringent limit value, and this limit value has even been refined to the different periods in one day.But when how to determine each
Action frequency in section there is no research at present, and engineering site is mostly empirically arranged and adjusts, and this method is detached from load variations
Reality, be also only capable of guaranteeing to a small extent peak, paddy power grid reactive requirement, and then seriously affect single substation's electricity
Press the effect of idle regulation.
The present invention catches the discrete reactive source such as capacitor/reactor in the demand for the voltage & var control for meeting monotropic power station
Principal contradiction, the control target in each stage, while the Weighted adaptive for passing through the time are reflected by integer programming intelligence
Reflection different periods load trend, and then obtain the action frequency of each period.
The integer programming method of the discrete reactive apparatus day action frequency setting in monotropic power station of the invention, if certain substation day
One shares N number of Time segments division point, and the corresponding discrete reactive apparatus of any time period is an integer variable, then discrete reactive apparatus pair
The integer variable number answered be N, calculate day total action frequency specifically includes the following steps:
Step S1, the capacity for calculating the i-th period corresponding discrete reactive apparatus is Qi；I=1,2 ... N；
Step S2, according to Time segments division as a result, determining the active power p of starting point in the i-th periodstart_iWith end point
Active power pend_iAnd the end time T of the periodi+1With initial time Ti；
Step S3 determines reactive requirement in the i-th periodα is adjustment factor, general value
Range is 1 < α < 1.5.
Step S4 establishes following objective function:
s.t ki*Qi>Qi0+γ
Here (Ti+1-Ti)2*(ki*Qi-Qi0)2The target of item is Ti~Ti+1The nothing of discrete reactive apparatus and power grid in period
The deviation of function demand is minimum, and the deviation meaning of this form has two layers:
(1)(Ti+1-Ti)2The idle variation tendency indicated is longer, and the discrete reactive source such as capacitor just needs more to act
Number；
(2)(ki*Qi-Qi0)2It indicates, within the unit time, faster, the discrete reactive source such as capacitor of idle variation
With regard to needing more action frequencies.
Wherein, kiThe action frequency distributed, k are needed for the i-th periodi 2Indicate be guarantee equipment action frequency most
Few, λ > 0 is weight control coefrficient, and γ > 0 is nargin control coefrficient.The specific value of two coefficients can be carried out rule of thumb herein
Setting, when thinking that action frequency is more important, weight control coefrficient can be set larger, when think guarantee nargin it is more important
When, bigger nargin control coefrficient can be set.
Constrain ki*Qi>Qi0+ γ are to guarantee in each Time segments division section, and the total of discrete reactive apparatus contributes
The reactive requirement of its idle system that is able to satisfy of contributing in action frequency limit value.
Step S5 solves above-mentioned integer programming problem, obtains the action frequency k of the i-th periodi；Obtain day total movement time
Number is
The method of the present invention requires the deviation of the reactive requirement amount of discrete reactive apparatus and power grid minimum in objective function, should
Deviation by the time span of the period it is adaptive processing is weighted to deviation, objective function another part is by action frequency
Least limit value composition, to reduce control cost, in constraint, guarantees in each Time segments division section, discrete idle to set
The reactive requirement of its idle system that is able to satisfy of contributing in standby total action frequency limit value of contributing, by solving the integer programming mould
The discrete reactive apparatus singly stood can be obtained in the action frequency of different periods in type, and this method principle is simple, and it is convenient to solve, and has
Very strong engineering practicability.
Correspondingly, according to above-mentioned method, the present invention also provides a kind of monotropic discrete reactive apparatus day action frequencies in power station
Device is set, comprising:
Period parameters determining module, for according to substation's day Time segments division as a result, determining starting point in each period
The active power of active power and end point；
Reactive requirement computing module, for according to the active power of starting point in each period and the wattful power of end point
Rate determines reactive requirement in each period；
Reactive apparatus capacity calculation module, for calculating the capacity of corresponding discrete reactive apparatus of each period；
Objective function establishes module, for establishing with the inclined of the capacity of reactive apparatus discrete in all periods and reactive requirement
Poor minimum and equipment action frequency is at least the objective function of target；
Action frequency computing module obtains the action frequency of each period for solving above-mentioned objective function, it is total to obtain day
Action frequency.
Preferably, in reactive requirement computing module, reactive requirement in the i-th periodWherein, i
=1,2 ... N；N is substation day Time segments division quantity, and α is adjustment factor, pstart_iHave for starting point in the i-th period
Function power, pend_iFor the active power of end point in the i-th period.
Preferably, adjustment factor α value range is 1 < α < 1.5.
Preferably, objective function is established in module, objective function expression formula are as follows:
s.t ki*Qi>Qi0+γ
Wherein, TiFor the i-th slot start time, Ti+1For the i-th end time period, QiFor the i-th period corresponding discrete nothing
The capacity of function equipment, Qi0Reactive requirement in i-th period, kiThe action frequency distributed, (T are needed for the i-th periodi+1-Ti)2*(ki*
Qi-Qi0)2The target of item is Ti~Ti+1The deviation of the reactive requirement amount of the capacity of discrete reactive apparatus and power grid is minimum in period,
ki 2Indicate be equipment action frequency it is minimum, λ is weight control coefrficient, and λ > 0, γ are nargin control coefrficient, γ > 0；
Constraint condition ki*Qi>Qi0+ γ is to guarantee in each Time segments division section, and the total of discrete reactive apparatus goes out
The reactive requirement of its idle system that is able to satisfy of contributing in power action frequency limit value.
Correspondingly, the present invention also provides a kind of computer readable storage medium for storing one or more programs, it is special
Sign is, one or more of programs include instruction, described instruction when executed by a computing apparatus so that the calculating equipment is held
The above-mentioned method of row.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications, these improvements and modifications can also be made
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. the monotropic discrete reactive apparatus day action frequency setting method in power station, characterized in that specifically include following procedure:
S1, according to substation's day Time segments division as a result, determining the active of the active power of starting point and end point in each period
Power；
S2 determines idle need in each period according to the active power of starting point in each period and the active power of end point
It asks；
S3 calculates the capacity of corresponding discrete reactive apparatus of each period；
S4 establishes the movement time with the deviation of the capacity of discrete reactive apparatus in all periods and reactive requirement minimum and equipment
Number is at least the objective function of target；
S5 solves above-mentioned objective function and obtains the action frequency of each period, obtains day total action frequency.
2. the discrete reactive apparatus day action frequency setting method in monotropic power station according to claim 1, characterized in that any
Period corresponding discrete reactive apparatus action frequency is an integer variable.
3. the discrete reactive apparatus day action frequency setting method in monotropic power station according to claim 1, characterized in that S2
In, reactive requirement in the i-th periodWherein, i=1,2 ... N；N is to draw the substation day period
Dosis refracta, α are adjustment factor, pstart_iFor the active power of starting point in the i-th period, pend_iFor end point in the i-th period
Active power.
4. the discrete reactive apparatus day action frequency setting method in monotropic power station according to claim 3, characterized in that adjust
Factor alpha value range is 1 < α < 1.5.
5. the discrete reactive apparatus day action frequency setting method in monotropic power station according to claim 1, characterized in that S4
In, objective function expression formula are as follows:
s.t ki*Qi>Qi0+γ
Wherein, TiFor the i-th slot start time, Ti+1For the i-th end time period, QiIt corresponding discrete idle is set for the i-th period
Standby capacity, Qi0Reactive requirement in i-th period, kiThe action frequency distributed, (T are needed for the i-th periodi+1-Ti)2*(ki*Qi-
Qi0)2The target of item is Ti~Ti+1The deviation of the reactive requirement amount of the capacity of discrete reactive apparatus and power grid is minimum in period, ki 2
Indicate be equipment action frequency it is minimum, λ is weight control coefrficient, and λ > 0, γ are nargin control coefrficient, γ > 0；
Constraint condition ki*Qi>Qi0+ γ is total movement of contributing of discrete reactive apparatus to guarantee in each Time segments division section
The reactive requirement of its idle system that is able to satisfy of contributing in number limit value.
6. device is arranged in the monotropic discrete reactive apparatus day action frequency in power station, characterized in that include:
Period parameters determining module, for according to substation's day Time segments division as a result, determining the active of starting point in each period
The active power of power and end point；
Reactive requirement computing module, for according to the active power of starting point in each period and the active power of end point, really
Reactive requirement in fixed each period；
Reactive apparatus capacity calculation module, for calculating the capacity of corresponding discrete reactive apparatus of each period；
Objective function establishes module, for establishing with the deviation of the capacity of reactive apparatus discrete in all periods and reactive requirement most
Small and equipment action frequency is at least the objective function of target；
Action frequency computing module obtains the action frequency of each period for solving above-mentioned objective function, obtains day total dynamic
Make number.
7. the discrete reactive apparatus day action frequency setting method in monotropic power station according to claim 6, characterized in that idle
In demand computing module, reactive requirement in the i-th periodWherein, i=1,2 ... N；N is to become
Power station day Time segments division quantity, α is adjustment factor, pstart_iFor the active power of starting point in the i-th period, pend_iWhen being i-th
The active power of end point in section.
8. device is arranged in the discrete reactive apparatus day action frequency in monotropic power station according to claim 7, characterized in that adjust
Factor alpha value range is 1 < α < 1.5.
9. device is arranged in the discrete reactive apparatus day action frequency in monotropic power station according to claim 6, characterized in that target
Function is established in module, objective function expression formula are as follows:
s.t ki*Qi>Qi0+γ
Wherein, TiFor the i-th slot start time, Ti+1For the i-th end time period, QiIt corresponding discrete idle is set for the i-th period
Standby capacity, Qi0Reactive requirement in i-th period, kiThe action frequency distributed, (T are needed for the i-th periodi+1-Ti)2*(ki*Qi-
Qi0)2The target of item is Ti~Ti+1The deviation of the reactive requirement amount of the capacity of discrete reactive apparatus and power grid is minimum in period, ki 2
Indicate be equipment action frequency it is minimum, λ is weight control coefrficient, and λ > 0, γ are nargin control coefrficient, γ > 0；
Constraint condition ki*Qi>Qi0+ γ is total movement of contributing of discrete reactive apparatus to guarantee in each Time segments division section
The reactive requirement of its idle system that is able to satisfy of contributing in number limit value.
10. a kind of computer readable storage medium for storing one or more programs, characterized in that one or more of programs
Including instruction, described instruction when executed by a computing apparatus so that the calculatings equipment execution it is any to 5 according to claim 1
Method described in.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811093588.4A CN109193688B (en) | 2018-09-19 | 2018-09-19 | Method and device for setting daily action times of discrete reactive equipment of single transformer substation |
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|---|---|---|---|
| CN201811093588.4A CN109193688B (en) | 2018-09-19 | 2018-09-19 | Method and device for setting daily action times of discrete reactive equipment of single transformer substation |
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