CN104810834B - Many section 500kV electric network reactive compensations switching strategy optimization methods based on voltage sensibility - Google Patents
Many section 500kV electric network reactive compensations switching strategy optimization methods based on voltage sensibility Download PDFInfo
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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
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Abstract
The invention discloses many section 500kV electric network reactive compensations switching strategy optimization methods based on voltage sensibility, including following steps：Input 500kV Net Frame of Electric Network data and reactive power compensator configuring condition；The transformer station that there are problems that voltage out-of-limit in the case of many sections is analyzed based on voltage sensibility analysis method, the switching sequence list of all 500kV substation low-voltage sides reactive power compensators is set up to the sensitivity height of voltage according to each transformer station；Switching is carried out to actual electric network reactive power compensator according to switching sequence list, until the busbar voltage of all 500kV transformer stations meets the requirement of working voltage bound；Obtain optimal switching strategy and switching record.While switching strategy after present invention optimization ensures that 500kV busbar voltages are rationally run in the case of continuous multiple sections, the switching frequency of Reactive Power Device is reduced, 500kV substation bus bar voltages meet bound requirement.
Description
Technical field
The present invention relates to a kind of many section 500kV electric network reactive compensation switching strategies optimization sides based on voltage sensibility
Method, belongs to electric network reactive-load voltage optimization technical field.
Background technology
The optimization switching of reactive compensator of electrical network is an important content in operation of power networks, is based on existing idle benefit
Repay device configuration and grid structure, in known optimization cycle on the premise of each node load power of system, optimizing application technology
The optimal switching strategy of Reactive Power Device is determined, plays a part of reducing via net loss, eliminate overload and improving voltage's distribiuting.
Mainly have when studying Reactive Power Device optimization switching problem towards when discontinuity surface static optimization and consider switching time
The class method of global dynamic optimization two of number limitation.Static optimization considers each with the minimum target of the system losses for optimizing the moment
Plant operation constraints.The variable of static optimization is only the input group number for optimizing moment each Reactive Power Device, the scale of solution space compared with
It is small to be easy to obtain optimization solution in a short time, and both offline optimization can be carried out according to following one day predicted load, also may be used
Real-time optimization is carried out using the online load data of system.But there are a distinct issues in conventional static optimization method：It is excellent
Change model only with the minimum target of the system losses at each moment, it is difficult to consider that switching frequency is limited, prioritization scheme does not often have
Standby actual operability.Dynamic optimization was divided into some periods, with whole day based on following one day load prediction data by one day
The minimum target of network loss sum of day part, and it regard switching frequency limitation as an important constraints.Dynamic optimization mould
The control variable of type includes the input group number of each node Reactive Power Device of whole day day part, and the dimension of control variable drastically expands, solved
Space Scale and amount of calculation will be more much bigger than static optimization, and its Optimization Solution is very difficult.
In 500kV power network actual motions, the switching of substation low-voltage side reactive power compensator is generally by monitoring personnel root
Determined according to the voltage change situation of single substation bus bar, exist that switching frequency is more, voltage regulation result is poor, shortage global optimization etc.
Shortcoming.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the present invention to provide a kind of many sections based on voltage sensibility
500kV electric network reactive compensation switching strategy optimization methods, switching sequence list of the present invention based on voltage sensibility foundation is to idle
Compensation device optimizes switching, while when ensureing selected, the accumulative switching frequency of reactive power compensator is minimum in discontinuity surface,
And 500kV substation bus bar voltages meet bound requirement.
To achieve these goals, the present invention is to realize by the following technical solutions：
Many section 500kV electric network reactive compensations switching strategy optimization methods based on voltage sensibility of the present invention, including
Following steps：
(1) input 500kV grid nodes, circuit, transformer, load data and reactive power compensator quantity and capacity, defeated
Enter to need the node voltage and line power of power network and reactive-load compensation under the continuous operating time section quantity optimized, each section to fill
The switching strategy put, switching strategy includes optimal switching strategy, nearest switching strategy and newest switching strategy；
(2) transformer station that there are problems that voltage out-of-limit in the case of many sections is divided based on voltage sensibility analysis method
, there is the transformer station of voltage out-of-limit in analysis, calculate 500kV reactive compensator of electrical network and voltage out-of-limit is become under discontinuity surface when determining many
The voltage sensibility in power station, the switching for setting up all 500kV substation low-voltage sides reactive power compensators according to sensitivity height is excellent
First sequence list；
(3) switching is carried out to actual electric network reactive power compensator according to switching sequence list, until all 500kV transformer stations
Busbar voltage meets the requirement of working voltage bound；
(4) the optimal switching strategy of 500kV reactive compensator of electrical network and switching record in the case of many sections are finally given.
Step (2)-(4) specifically include following steps：
The continuous operating time section quantity for needing to optimize is set to T, optimal switching strategy is set to STR0, nearest switching plan
Slightly it is set to STR1STR is set to newest switching strategy2, switching record be set to ACT, wherein：STR0、STR1And STR2Including all
The switching state of 500kV Reactive Power Compensation Eqyuipment in Substation, the switching state includes number of units and capacity；ACT records each power transformation
Time, number of units and the capacity for the reactive power compensator switching stood, the shape of 500kV reactive power compensators when will be first under discontinuity surface
State is set to newest switching strategy STR2；te=0 (teRepresent discontinuity surface at the 0th)；
step0:T=1 is set, discontinuity surface when representing first, by STR2It is updated to STR0And STR1, ACT empties；
step1:By STR2Substitute into t sections under operation of power networks data carry out Load flow calculation (computational methods are prior art,
Here is omitted), all 500kV transformer stations that there will be the out-of-limit situation of busbar voltage are designated as set STAo；Such as STAoFor sky,
Show that out-of-limit situation is not present, turn step2；If STAoIt is not sky, shows there is voltage out-of-limit situation, turn step3；
step2:T=t+1, if t ＞ T, turn step7；Otherwise, step1 is turned；
step3:500kV reactive compensator of electrical network is calculated to STAoIn all transformer stations voltage sensibility, according to electricity
Pressure level of sensitivity sets up the preferential switching sequence list of reactive power compensator, and reactive-load compensation dress is put into successively according to switching sequence list
Put, and carry out Load flow calculation, until the 500kV substation bus bar voltages under t section meet bound requirement, and by switching
Operation is updated to STR2If, te=t, turns step4；
step4:te=te- 1, such as te=0, turn step0；Otherwise, step5 is turned；
step5:By STR2Substitute into teOperation of power networks data under section carry out Load flow calculation, judge whether that 500kV becomes
Power station voltage out-of-limit situation, such as exists, turns step6；Such as it is not present, turns step4；
step6:Compare STR1And STR2, different Reactive Power Device switching states is updated to ACT, turns step2；
step7:Export optimal switching strategy STR0And ACT, terminate to calculate.
In the step (3), switching is carried out to actual electric network reactive power compensator according to switching sequence list, and pass through electric power
System specialty analysis software BPA carries out simulation analysis calculating to multiple power network profile datas, verifies whether 500kV transformer stations occur
Busbar voltage it is out-of-limit, meet service requirement.
Switching strategy after present invention optimization ensures what 500kV busbar voltages were rationally run in the case of continuous multiple sections
Meanwhile, the switching frequency of Reactive Power Device is reduced, 500kV substation bus bar voltages meet bound requirement, extend idle benefit
The service life of device is repaid, plays a part of reducing via net loss, eliminate overload and improving voltage's distribiuting, improves operation of power networks
Economy and stability.
Brief description of the drawings
Fig. 1 is many section 500kV electric network reactive compensations switching strategy optimization methods based on voltage sensibility of the invention
Workflow diagram.
Embodiment
To be easy to understand the technical means, the inventive features, the objects and the advantages of the present invention, with reference to
Embodiment, is expanded on further the present invention.
The present invention is a kind of many section 500kV electric network reactive compensations switching strategy optimization methods based on voltage sensibility,
It is the voltage out-of-limit problem existed using transformer station in the case of many sections of voltage sensibility ANALYSIS OF CALCULATING, so that according to each
Reactive Power Compensation Eqyuipment in Substation determines its switching priority to the height of busbar voltage sensitivity, obtain 500kV power networks without
Switching strategy after work(compensation optimizing, reduces switching frequency, improves voltage regulation result, realizes global optimization and the warp of power network
Ji operation.It is comprised the following steps that：
(1) 500kV Net Frame of Electric Network data and reactive power compensator configuring condition are determined, and during continuous operation to be optimized
Discontinuity surface quantity, profile data and switching strategy.
(2) transformer station that there are problems that voltage out-of-limit in the case of many sections is divided using voltage sensibility analytic approach
Analysis, sets up the switching sequence list of the whole network reactive power compensator；
Computational methods detailed process based on voltage sensibility is as follows：
The continuous operating time section quantity for needing to optimize is set to T, correlated variables includes optimal switching strategy STR0, most
Nearly switching strategy STR1With newest switching strategy STR2, switching operation ACT, wherein：STR0、STR1And STR2Including all 500kV
The switching state (number of units and capacity) of Reactive Power Compensation Eqyuipment in Substation；ACT records the reactive power compensator switching of each transformer station
Time, number of units and capacity.
step0:Discontinuity surface t=1 when remembering first, STR is updated to by the switching strategy of reactive power compensator under the t periods0、
STR1And STR2, ACT=φ, te=0；
step1:By STR2The operation of power networks data substituted under t sections carry out Load flow calculation, there will be busbar voltage out-of-limit
All 500kV transformer stations of situation are designated as set STAo；Such as STAo=φ, turns step2；Otherwise, step3 is turned；
step2:T=t+1, if t ＞ T, turn step7；Otherwise, step1 is turned；
step3:All reactive power compensators are calculated to STAoIn all transformer stations voltage sensibility, according to STR2And nothing
The capacity formation STA of work(deviceoMiddle transformer station's Reactive Power Device switching priority sequence table, based on switching sequence list and voltage out-of-limit value
Carry out the switching operation of Reactive Power Device, it is ensured that meet voltage bound requirement under t sections, and switching strategy is updated to STR2,
If te=t turns step4；
step4:te=te- 1, such as te=0, turn step5；Otherwise, step6 is turned；
step5:STR0=STR1=STR2, turn step2:；
step6:By STR2Substitute into teOperation of power networks data carry out Load flow calculation under section, such as there is the 500kV of voltage out-of-limit
Transformer station, contrasts STR2And STR1The difference of middle Reactive Power Device switching state, and by the switching time t of related Reactive Power DeviceeAnd throwing
Capacity is cut added to ACT, STR1=STR2, turn step2:；
step7:Export optimal switching strategy STR0And ACT, terminate to calculate.
Analyzed by algorithm above, the Reactive Power Compensation Eqyuipment in Substation switching strategy that there are problems that voltage out-of-limit has obtained excellent
Change, so as to set up all 500kV substation low-voltage sides Reactive Power Devices to the sensitivity height of voltage according to each transformer station
Switching sequence list；
(3) table selects the switching of Reactive Power Device and ensured above and below whole 500kV substation bus bars voltages satisfactions in sequence
Limit is required；
(4) the optimal switching strategy of 500kV reactive compensator of electrical network and switching record are obtained；Switching strategy after optimization exists
While ensureing that 500kV busbar voltages are rationally run in the case of continuous multiple sections, the switching frequency of Reactive Power Device is reduced, is prolonged
The service life of reactive power compensator has been grown, has played a part of reducing via net loss, eliminate overload and improving voltage's distribiuting, improves
The economy of operation of power networks.
In view of the deficiency of existing Jiangsu Power Grid 500kV Reactive Power Compensation Eqyuipment in Substation switching strategies, using above-mentioned optimization
Method is optimized, compared with conventional switching strategy, and the switching strategy after optimization ensures 500kV in the case of continuous multiple sections
While busbar voltage is rationally run, equipment caused by the cost of labor and Reactive Power Device frequent switching in operation of power networks is reduced
Loss, and economic benefit has long-term effect.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (3)
1. many section 500kV electric network reactive compensations switching strategy optimization methods based on voltage sensibility, it is characterised in that including
Following steps：
(1) all 500kV transformer parameters, 500kV line parameter circuit values in input power network, and reactive power compensator quantity and appearance
Amount, input needs the continuous operating time section quantity optimized, the node voltage and line power of power network and idle under each section
The switching strategy of compensation device, the switching strategy includes optimal switching strategy, nearest switching strategy and newest switching strategy；
(2) transformer station that there are problems that voltage out-of-limit in the case of many sections is analyzed based on voltage sensibility analysis method,
There is the transformer station of voltage out-of-limit when determining many under discontinuity surface, calculate 500kV reactive compensator of electrical network to voltage out-of-limit power transformation
The voltage sensibility stood；
(3) switching is carried out to actual electric network reactive power compensator according to switching sequence list, until the bus of all 500kV transformer stations
Voltage meets the requirement of working voltage bound；
(4) the optimal switching strategy of 500kV reactive compensator of electrical network and switching record in the case of many sections are finally given.
2. many section 500kV electric network reactive compensations switching strategies optimization according to claim 1 based on voltage sensibility
Method, it is characterised in that step (2)-(4) specifically include following steps：
The continuous operating time section quantity for needing to optimize is set to T, optimal switching strategy is set to STR0, nearest switching strategy sets
For STR1STR is set to newest switching strategy2, switching record be set to ACT, wherein：STR0、STR1And STR2Including all 500kV
The switching state of Reactive Power Compensation Eqyuipment in Substation, the switching state includes the number of units and capacity of all reactive power compensators；ACT
Time, number of units and the capacity of the reactive power compensator switching of each transformer station are recorded, by 500kV reactive power compensators during t=1
State be set to nearest switching strategy；
step0:T=1, t are seteDiscontinuity surface when=0 expression is first, by STR2It is updated to STR0And STR1, ACT empties；
step1:By STR2The operation of power networks data substituted under t sections carry out Load flow calculation, there will be the out-of-limit situation of busbar voltage
All 500kV transformer stations are designated as set STAo；Such as STAoFor sky, show that out-of-limit situation is not present, turn step2；If STAoIt is not
Sky, shows there is voltage out-of-limit situation, turns step3；
step2:T=t+1, if t>T, turns step7；Otherwise, step1 is turned；
step3:500kV reactive compensator of electrical network is calculated to STAoIn all transformer stations voltage sensibility, according to pressure sensitive
Degree size sets up the preferential switching sequence list of reactive power compensator, and reactive power compensator is put into successively according to switching sequence list, and
Load flow calculation is carried out, until the 500kV substation bus bar voltages under t section meet bound requirement, and by switching operation
It is updated to STR2If, te=t, turns step4；
step4:te=te- 1, such as te=0, turn step0；Otherwise, step5 is turned；
step5:By STR2Substitute into teOperation of power networks data under section carry out Load flow calculation, judge whether 500kV transformer stations
Voltage out-of-limit situation, such as exists, turns step6；Such as it is not present, turns step4；
step6:Compare STR1And STR2, different Reactive Power Device switching states is updated to ACT, turns step2；
step7:Export optimal switching strategy STR0And ACT, terminate to calculate.
3. many section 500kV electric network reactive compensations switching strategies optimization according to claim 1 based on voltage sensibility
Method, it is characterised in that
In the step (3), switching is carried out to actual electric network reactive power compensator according to switching sequence list, and pass through power system
Specialty analysis software BPA carries out simulation analysis calculating to multiple power network profile datas, verifies whether 500kV substation bus bars occur
Voltage it is out-of-limit, meet service requirement.
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| CN109713680B (en) * | 2019-03-11 | 2022-05-20 | 云南电网有限责任公司电力科学研究院 | Regional power grid voltage rapid adjustment method based on improved sensitivity method |
| CN110826228B (en) * | 2019-11-07 | 2022-07-01 | 国网四川省电力公司电力科学研究院 | Regional power grid operation quality limit evaluation method |
| CN115021278B (en) * | 2022-07-07 | 2023-09-29 | 扬州浩辰电力设计有限公司 | Switching strategy optimization method for multi-group switching reactive power compensation device of 220kV transformer substation |
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| JPH0777490B2 (en) * | 1987-05-15 | 1995-08-16 | 富士電機株式会社 | Reactive power compensation method by optimal control of stochastic system |
| CN102545230A (en) * | 2012-01-10 | 2012-07-04 | 四川省电力公司 | Voltage out-of-limit adjusting method |
| CN103715700B (en) * | 2013-12-19 | 2016-05-25 | 国家电网公司 | Be applicable to powerless control system and the control method of wind farm grid-connected point voltage control |
| CN104092221A (en) * | 2014-06-19 | 2014-10-08 | 航天科工深圳（集团）有限公司 | Optimized and optimally-cutting reactive compensation method and reactive compensation device |
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