CN108429266A - Continuous and discrete reactive source control method for coordinating based on dynamic coordinate boundary threshold - Google Patents
Continuous and discrete reactive source control method for coordinating based on dynamic coordinate boundary threshold 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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- 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 the continuous and discrete reactive source control method for coordinating based on dynamic coordinate boundary threshold, include the following steps：The boundary threshold impact factor of zoning maincenter busbar and supervisory control of substation busbar；The dynamic coordinate boundary threshold of calculating maincenter busbar and supervisory control of substation busbar；Voltage limits range amendment to region maincenter busbar and supervisory control of substation busbar；Revised voltage limits range is substituted into continuous quantity region secondary voltage control model, by two-phase method to the region secondary voltage control Modifying model of discrete magnitude and continuous quantity.The present invention adjusts voltage border coordination threshold adaptive dynamic, by, continuously with discrete reactive source, effectively reducing the action frequency of discrete device in two-phase optimization method coordination region, effectively improving the economy of reactive power/voltage control and safety in power grid.
Description
Technical field
The present invention relates to operation and control of electric power system technical fields, more particularly to the company based on dynamic coordinate boundary threshold
Continuous and discrete reactive source control method for coordinating.
Background technology
Secondary voltage control realizes that the coordination of various reactive sources and control targe in region calculates, and is automatism voltage control
Core Feature.In traditional secondary voltage control, two-phase method has been all made of to solve the MIXED INTEGER of discrete magnitude and continuous quantity
Planning problem.This method can decompose discrete magnitude and continuous quantity problem, have good control convergence.However this algorithm
The control adjustment amount of each reactive source is only given according to theoretical algorithm, does not consider discrete and continuous reactive source control generation
Valence, discrete magnitude are switched due to its physical characteristic, as soon as with the control number limitation in specified time, need to examine more than control number
It repaiies and replaces；And continuous quantity is adjusted by DCgenerator motor field system, SVG or wind turbine etc., control cost is well below discrete
Amount control cost.Traditional secondary voltage control does not consider the problems in these Practical Projects, often will appear discrete magnitude and excessively adjusts
The phenomenon that section causes number out-of-limit or switchgear aging is rapid, so as to cause the hair of even switch fault accident is unable to control
It is raw, prodigious hidden danger is brought to electric power netting safe running.
Invention content
Present invention seek to address that do not consider discrete and continuous reactive source control cost in conventional voltage control at present,
It often will appear discrete magnitude and excessively adjust and cause number out-of-limit or switchgear aging is rapid and brought very to electric power netting safe running
The problem of big hidden danger.
In order to realize that above-mentioned target, the present invention use technical solution below：
Continuous and discrete reactive source control method for coordinating based on dynamic coordinate boundary threshold, feature includes following step
Suddenly：
1) the boundary threshold impact factor of region maincenter busbar and supervisory control of substation busbar is calculated separately；
2) the boundary threshold impact factor of the region maincenter busbar and supervisory control of substation busbar obtained according to step 1) calculates
The dynamic coordinate boundary threshold of region maincenter busbar and supervisory control of substation busbar；
3) the dynamic coordinate boundary threshold of the region maincenter busbar and supervisory control of substation busbar that are obtained according to step 2) is to area
The voltage limits range of domain maincenter busbar and supervisory control of substation busbar is adjusted, and obtains revised region maincenter busbar and change
The voltage limits range of monitoring power station busbar；
4) revised region maincenter busbar described in step 3) and supervisory control of substation busbar voltage limits are substituted into
The secondary voltage control model of continuous quantity, by two-phase method to the region secondary voltage control model of discrete magnitude and continuous quantity into
Row is corrected and is solved.
The advantageous effect that the present invention is reached：The present invention is in traditional secondary voltage control theoretical foundation, to maincenter busbar
Increase the dynamic coordinate boundary based on voltage constraint and reactive source Reactive Power Reserve when continuous quantity is adjusted with supervisory control of substation busbar
Its voltage limits section is carried out " constriction " adjustment, continuous quantity is made to be constrained in voltage by way of changing voltage limits by threshold value
It is pre-adjusted under being constrained with Reactive Power Reserve.Due to consideration that busbar voltage limit value constraint and continuous reactive source it is idle standby
With above and below voltage closely limits or is idle when spare shortcoming, orchestration boundary threshold value tends to limit with discrete magnitude control close to 0
Value overlaps, and when load change or larger grid disturbance, voltage out-of-limit can then trigger discrete magnitude control.The invention is by adjusting area
In the orchestration boundary threshold value effective coordination of domain maincenter busbar region continuously speed is calculated with discrete reactive source Harmonic Control
Degree is very fast, and convergence and traditional secondary voltage control are almost the same, effectively reduce the Readjusting cost of the discrete reactive source of power grid
Cost has ensured electric network reactive-load voltage security and economical operation.
Specific implementation mode
In order to keep the objectives, technical solutions, and advantages of the present invention clearer, below the invention will be further described.It answers
Work as understanding, the following examples are only intended to illustrate the technical solution of the present invention more clearly, and cannot limit the present invention with this
Protection domain.
Continuous and discrete reactive source control method for coordinating based on dynamic coordinate boundary threshold, includes the following steps：
1) the boundary threshold impact factor of region maincenter busbar and supervisory control of substation busbar is calculated separately；
2) the boundary threshold impact factor of the region maincenter busbar and supervisory control of substation busbar obtained according to step 1) calculates
The dynamic coordinate boundary threshold of region maincenter busbar and supervisory control of substation busbar；
3) the dynamic coordinate boundary threshold of the region maincenter busbar and supervisory control of substation busbar that are obtained according to step 2) is to area
The voltage limits range of domain maincenter busbar and supervisory control of substation busbar is adjusted, and obtains revised region maincenter busbar and change
The voltage limits range of monitoring power station busbar；
4) revised region maincenter busbar described in step 3) and supervisory control of substation busbar voltage limits are substituted into
The secondary voltage control model of continuous quantity, by two-phase method to the region secondary voltage control model of discrete magnitude and continuous quantity into
Row is corrected and is solved.
The expression formula of zoning maincenter busbar boundary threshold impact factor is：
V in formulap、WithV pThe respectively voltage current value of region maincenter busbar, upper voltage limit and lower voltage limit；ηpFor in
Pivot busbar voltage weight coefficient；Qj、WithQ jRespectively the idle current value, the idle upper limit in j-th of region continuous reactive source and
Idle lower limit；μpjFor maincenter busbar in region and the idle sensitivity of the voltage-in j-th of continuous reactive source.It can from formula (1)
Go out impact factor and levels off to 0 when maincenter busbar voltage is close to bound or continuous reactive source Reactive Power Reserve deficiency；Conversely, upper
With larger boundary threshold impact factor when the lower voltage adjustment larger and upper and lower Reactive Power Reserve section in section is larger.The influence because
Son is in dynamic change state with the idle situation of maincenter busbar voltage and continuous reactive source.
The expression formula of the boundary threshold impact factor of zoning supervisory control of substation busbar is：
V in formulas、WithV sThe respectively voltage current value of region supervisory control of substation busbar, upper voltage limit and lower voltage limit；
Qj、WithQ jRespectively idle current value, the idle upper limit and the idle lower limit in j-th of region continuous reactive source；ηsIt is supervised for substation
Control busbar voltage weight coefficient；μsjIt is idle sensitive for supervisory control of substation busbar in region and the voltage-in j-th of continuous reactive source
Degree.
Region voltage and company are based on when the boundary threshold impact factor of zoning maincenter busbar and supervisory control of substation busbar
Continue reactive source Reactive Power Reserve situation to consider.
By the dynamic coordinate boundary threshold of boundary threshold impact factor zoning maincenter busbar, expression formula is：
In formulaFor the rated voltage of maincenter busbar, λpFor the boundary threshold impact factor of maincenter busbar；
Since maincenter busbar rated voltage is definite value, boundary dead zone and impact factor change linearly relationship.
The dynamic coordinate boundary threshold of region supervisory control of substation busbar is expressed as：
In formulaFor the rated voltage of supervisory control of substation busbar, λsFor supervisory control of substation busbar boundary threshold influence because
Son.
The dynamic coordinate boundary threshold provides region maincenter busbar and substation when carrying out idle adjustment for continuous reactive source
The revised voltage limits range of busbar is monitored, expression formula is：
(1) revised maincenter busbar voltage limits expression formula is：
(2) supervisory control of substation busbar voltage limits expression formula is after similarly correcting：
Traditional continuous quantity and discrete magnitude secondary voltage control model indicates as follows：
Object function V in formulapWithVsWithMaincenter busbar and supervisory control of substation busbar voltage respectively in region
Value and voltage optimization desired value；Vp、WithV pRespectively under the voltage current value of region maincenter busbar, upper voltage limit and voltage
Limit；Vs、WithV sThe respectively voltage current value of region supervisory control of substation busbar, upper voltage limit and lower voltage limit；ΔQgWith Δ Qc
The respectively idle adjustment amount in continuous reactive source and discrete reactive source；CpgAnd Cpc、CsgAnd CscRespectively continuous reactive source and discrete
Reactive source is idle to maincenter busbar and supervisory control of substation busbar voltage-idle sensitivity；Constrain Q in inequalitygAnd QcRespectively connect
The continuous current idle output with discrete reactive source；Q gWith Q cWithRespectively continuous reactive source it is idle contribute, discrete reactive source without
The constraint that work(is contributed；gc(ΔQc) >=0 is electrical network parameter operation constraint in substation.Since the model is mixed programming problem, ask
It is difficult to solve, therefore generally use two-phase method carries out decomposition control in engineering, and the secondary voltage control model of continuous quantity is：
The secondary voltage control model of discrete magnitude is：
Region maincenter busbar and the revised voltage limits range of supervisory control of substation busbar are finally substituted into the two of continuous quantity
Step voltage Controlling model is modified, and revised expression formula is：
, object function V in formulapWithVsWithThe electricity of maincenter busbar and supervisory control of substation busbar respectively in region
Pressure value and voltage optimization desired value；Vp、WithV pRespectively under the voltage current value of region maincenter busbar, upper voltage limit and voltage
Limit；For the dynamic coordinate boundary threshold of region maincenter busbar；Vs、WithV sThe respectively electricity of region supervisory control of substation busbar
Current value, upper voltage limit and lower voltage limit are pressed,For the dynamic coordinate boundary threshold of region supervisory control of substation busbar；ΔQgFor
The idle adjustment amount in continuous reactive source；CpgAnd CsgIt is idle to maincenter busbar and supervisory control of substation busbar voltage-for continuous reactive source
Sensitivity；Constrain Q in inequalityg、WithQ gIt is continuous reactive source currently without work value, the idle upper limit and idle lower limit.
The secondary voltage control model of discrete magnitude is consistent with traditional secondary voltage control model.
In this way by adjusting the voltage limits range of continuous quantity Controlling model maincenter busbar and supervisory control of substation busbar, reach
It is constrained according to region voltage and Reactive Power Reserve situation dynamic adjustment orchestration boundary dead zone " constriction " its voltage in continuous quantity model
Effect enables continuous quantity to preferentially enter voltage out-of-limit correction link, in the case that there are Reactive Power Reserves fully to excavate continuous quantity
Reactive-power control ability, reduce the adjustment of discrete magnitude voltage out-of-limit, " microvariations continuous device optimizes, and large disturbances are discrete to reach
Equipment calibration " effect, and discrete magnitude switch motion number is significantly reduced, realize safety, economic continuous and discrete control variable
Coordination control.
Compared with conventional method, fully consider that the spare dynamic of voltage constraint and continuous reactive source adjusts using the method for the present invention
The dynamic coordinate boundary threshold of continuous quantity adjusts the voltage constraint section of continuous quantity, coordinates continuous quantity and discrete magnitude region is idle
Voltage controls, and region reactive voltage target is calculated and is more reasonably solved, and is suitable for actual engineering site.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. the continuous and discrete reactive source control method for coordinating based on dynamic coordinate boundary threshold, which is characterized in that including following
Step：
1) the boundary threshold impact factor of region maincenter busbar and supervisory control of substation busbar is calculated separately；
2) the boundary threshold impact factor zoning of the region maincenter busbar and supervisory control of substation busbar obtained according to step 1)
The dynamic coordinate boundary threshold of maincenter busbar and supervisory control of substation busbar；
3) the dynamic coordinate boundary threshold of the region maincenter busbar and supervisory control of substation busbar that are obtained according to step 2) is in region
The voltage limits range of pivot busbar and supervisory control of substation busbar is adjusted, and obtains revised region maincenter busbar and substation
Monitor the voltage limits range of busbar；
4) revised region maincenter busbar described in step 3) and supervisory control of substation busbar voltage limits are substituted into continuous
The secondary voltage control model of amount repaiies the region secondary voltage control model of discrete magnitude and continuous quantity by two-phase method
Just and solve.
2. the continuous and discrete reactive source control method for coordinating according to claim 1 based on dynamic coordinate boundary threshold,
It is characterized in that：The expression formula of the boundary threshold impact factor is as follows：
(1) the boundary threshold impact factor of region maincenter busbar is expressed as：
V in formulap、WithV pThe respectively voltage current value of region maincenter busbar, upper voltage limit and lower voltage limit；ηpFor maincenter mother
Line voltage weight coefficient；Qj、WithQ jThe respectively idle current value, the idle upper limit in j-th of region continuous reactive source and idle
Lower limit；μpjFor the idle sensitivity of voltage-of region maincenter busbar and j-th of continuous reactive source；
(2) the boundary threshold impact factor of region supervisory control of substation busbar is expressed as：
V in formulas、WithV sThe respectively voltage current value of region supervisory control of substation busbar, upper voltage limit and lower voltage limit；ηsFor
Supervisory control of substation busbar voltage weight coefficient；Qj、WithQ jRespectively idle current value, the nothing in j-th of region continuous reactive source
The work(upper limit and idle lower limit；μsjFor the idle sensitivity of voltage-of region supervisory control of substation busbar and j-th of continuous reactive source.
3. the continuous and discrete reactive source control method for coordinating according to claim 1 based on dynamic coordinate boundary threshold,
It is characterized in that：The expression formula of dynamic coordinate boundary threshold described in step 2) is as follows：
(1) expression formula of the dynamic coordinate boundary threshold of region maincenter busbar is：
In formulaFor the rated voltage of maincenter busbar, λpFor the boundary threshold impact factor of maincenter busbar；
(2) the dynamic coordinate boundary threshold expression formula of region supervisory control of substation busbar is：
In formulaFor the rated voltage of supervisory control of substation busbar, λsFor the boundary of supervisory control of substation busbar
Threshold value impact factor.
4. the continuous and discrete reactive source control method for coordinating according to claim 1 based on dynamic coordinate boundary threshold,
It is characterized in that：The revised voltage limits range expression is as follows：
(1) the voltage limits range expression of revised region maincenter busbar is：
V in formulap、WithV pThe respectively voltage current value of region maincenter busbar, upper voltage limit and lower voltage limit,For region
The dynamic coordinate boundary threshold of maincenter busbar；
(2) the voltage limits range expression of revised region supervisory control of substation busbar is：
V in formulas、WithV sThe respectively voltage current value of region supervisory control of substation busbar, upper voltage limit and lower voltage limit,
For the dynamic coordinate boundary threshold of region supervisory control of substation busbar.
5. the continuous and discrete nothing based on dynamic coordinate boundary threshold according to any one of Claims 1 to 4 claim
Work(source control method for coordinating, it is characterised in that：The discrete magnitude and the region secondary voltage control model expression of continuous quantity are：
Object function V in formulapWithVsWithMaincenter busbar and supervisory control of substation bus voltage value and electricity respectively in region
Press optimization target values；Vp、WithV pThe respectively voltage current value of region maincenter busbar, upper voltage limit and lower voltage limit；Vs、
WithV sThe respectively voltage current value of region supervisory control of substation busbar, upper voltage limit and lower voltage limit；ΔQgWith Δ QcRespectively connect
The idle adjustment amount of continuous reactive source and discrete reactive source；CpgAnd Cpc、CsgAnd CscRespectively continuous reactive source and discrete reactive source without
Work(is to maincenter busbar and supervisory control of substation busbar voltage-idle sensitivity；Constrain Q in inequalitygAnd QcIt is respectively continuous and discrete
The current idle output of reactive source；Q gWith Q cWithRespectively continuous reactive source it is idle contribute, discrete reactive source is idle output
Constraint；gc(ΔQc) >=0 is electrical network parameter operation constraint in substation.
6. the continuous and discrete nothing based on dynamic coordinate boundary threshold according to any one of Claims 1 to 4 claim
Work(source control method for coordinating, it is characterised in that：It is described to limit revised region maincenter busbar and supervisory control of substation busbar voltage
It is worth the secondary voltage control model that range substitutes into continuous quantity, the expression after being modified to the secondary voltage control model of continuous quantity
Formula is：
Object function V in formulapWithVsWithRespectively in region the voltage value of maincenter busbar and supervisory control of substation busbar and
Voltage optimization desired value；Vp、WithV pThe respectively voltage current value of region maincenter busbar, upper voltage limit and lower voltage limit；For the dynamic coordinate boundary threshold of region maincenter busbar；Vs、WithV sThe respectively voltage of region supervisory control of substation busbar
Current value, upper voltage limit and lower voltage limit,For the dynamic coordinate boundary threshold of region supervisory control of substation busbar；ΔQgFor even
The idle adjustment amount of continuous reactive source；CpgAnd CsgIt is continuous reactive source to maincenter busbar and supervisory control of substation busbar voltage-idle spirit
Sensitivity；Constrain Q in inequalityg、WithQ gIt is continuous reactive source currently without work value, the idle upper limit and idle lower limit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113471985A (en) * | 2021-09-02 | 2021-10-01 | 国能日新科技股份有限公司 | SVG control precision small-demand distance optimization reactive power compensation method and device |
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| CN105633974A (en) * | 2016-03-03 | 2016-06-01 | 甘肃省电力公司风电技术中心 | Real-time regional voltage coordination control method |
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| CN105633974A (en) * | 2016-03-03 | 2016-06-01 | 甘肃省电力公司风电技术中心 | Real-time regional voltage coordination control method |
| CN108899940A (en) * | 2018-07-09 | 2018-11-27 | 国网上海市电力公司 | A kind of second level power plant control method of AVC |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113471985A (en) * | 2021-09-02 | 2021-10-01 | 国能日新科技股份有限公司 | SVG control precision small-demand distance optimization reactive power compensation method and device |
| CN113471985B (en) * | 2021-09-02 | 2021-11-16 | 国能日新科技股份有限公司 | SVG control precision small-demand distance optimization reactive power compensation method and device |
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