CN106849133A - A kind of power system stabilizer, PSS excitation parameter optimization method and system - Google Patents
A kind of power system stabilizer, PSS excitation parameter optimization method and system Download PDFInfo
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- CN106849133A CN106849133A CN201710240582.4A CN201710240582A CN106849133A CN 106849133 A CN106849133 A CN 106849133A CN 201710240582 A CN201710240582 A CN 201710240582A CN 106849133 A CN106849133 A CN 106849133A
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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Abstract
A kind of power system stabilizer, PSS excitation parameter optimization method of disclosure and system, methods described include：Obtain electric power system data；According to the advanced compensation phase for calculating power system stabilizer, PSS of electric power system data；Whether within a preset range to judge compensation phase；If compensation phase is within a preset range, angular velocity axle decomposition amount is calculated to obtain according to compensation phase meter；Calculation times are obtained, angular speed axle decomposition amount array is obtained according to calculation times, preset group number and angular speed axle decomposition amount；Judge whether calculation times are equal to preset times；If calculation times are equal to preset times, the angular speed axle decomposition amount array is exported.The embodiment of the present application considers phase compensation link while required by code in parameters of power system stabilizer tuning process, further contemplate the influence of the gain decomposition amount on angular speed axle caused by phase compensation parameter, so as to preferably optimize power system stabilizer, PSS excitation parameter, reduce the probability of low-frequency oscillation.
Description
Technical field
The application is related to survey control technology field, more particularly to a kind of power system stabilizer, PSS excitation parameter optimization method
And system.
Background technology
Low-frequency oscillation happens occasionally in large-scale interconnected power system, often appears in long range and heavy load transmission line of electricity
On.The common scheme of current power oscillation damping is that power system stabilizer, PSS (power is installed in the excitation system of generator
System stabilizer, PSS), PSS is attached by introducing in field regulator as a kind of additional excitation control link
Plus signal, produces a positive damping torque, the negative damping for overcoming field regulator to cause is gone, so as to reach power oscillation damping
Purpose.If being only thought of as the machine produces pure damping torque, it is likely that bring negative damping, and excitation system to other generators
System is also closely related with power system and its method for operation and operating mode, so PSS must carry out system-wide parameter in power system
Coordinate design.
When PSS excitation parameters are calculated, it is necessary first to ensure that the phase of compensation reaches requirement.Therefore, calculate in the prior art
PSS parameter is adjusted, be generally only consider PSS phase compensation, the phase compensation in the range of frequency band especially specified, entirely
As long as the phase compensation of frequency band is within the scope of -120 ° to -80 °.
But PSS phase compensations parameter also has influence on the integration gain of PSS, such as while compensation phase is considered：In advance
Link also increases the integration gain of PSS while phase is compensated；Delay component will reduce PSS while phase is compensated
Integration gain, increase low-frequency oscillation probability.
The content of the invention
The application purpose is to provide a kind of power system stabilizer, PSS excitation parameter optimization method and system, to solve low frequency
Vibration probability problem high.
It is described according to the embodiment of the present application first aspect, there is provided a kind of power system stabilizer, PSS excitation parameter optimization method
Method is comprised the following steps：
Electric power system data is obtained, the electric power system data is the initial phase angle of different frequency；
According to the advanced compensation phase for calculating power system stabilizer, PSS of the electric power system data；
Whether within a preset range to judge the compensation phase；
If the compensation phase is in the preset range, the decomposition of angular velocity axle is calculated to obtain according to the compensation phase meter
Amount；
Calculation times are obtained, angular speed is obtained according to the calculation times, preset group number and the angular speed axle decomposition amount
Axle decomposition amount array；
Judge whether the calculation times are equal to preset times；
If the calculation times are equal to the preset times, the angular speed axle decomposition amount array is exported.
Alternatively, it is described according to calculation times, preset group number in the power system stabilizer, PSS excitation parameter optimization method
And angular speed axle decomposition amount obtains angular speed axle decomposition amount array and includes：
Judge the calculation times whether more than preset group number；
If the calculation times are less than or equal to the preset group number, the angular speed axle decomposition amount is put into the angle
In speed axle decomposition amount array；
If the calculation times are more than the preset group number, judge the angular speed axle decomposition amount whether more than the angle
Minimum value in speed axle decomposition amount array；
If the angular speed axle decomposition amount is more than the minimum value, the minimum value is replaced with into the angular speed axle
Decomposition amount.
Alternatively, it is described to be drawn according to compensation phase meter in the power system stabilizer, PSS excitation parameter optimization method
Angular speed axle decomposition amount includes：
Obtain multiplication factor；
Calculated according to the multiplication factor and the compensation phase meter and draw the angular speed axle decomposition amount.
Alternatively, in the power system stabilizer, PSS excitation parameter optimization method, it is described according to multiplication factor and compensation phase
Position calculates angular speed axle decomposition amount to be included：
Δ ω=K × cos (α+90)
Wherein, Δ ω is angular speed axle decomposition amount, and K is multiplication factor, and α is compensation phase.
Alternatively, in the power system stabilizer, PSS excitation parameter optimization method, the preset range is -120 °~-
80°。
According to the embodiment of the present application second aspect, there is provided a kind of power system stabilizer, PSS excitation parameter optimization, the system
Including：
Data acquisition module, for obtaining electric power system data, the electric power system data is the initial phase of different frequency
Angle；
Compensation phase meter calculates module, for according to the advanced compensation for calculating power system stabilizer, PSS of the electric power system data
Phase；
Compensation phase judge module, for whether within a preset range to judge the compensation phase；
Angular speed axle decomposition amount computing module, if for the compensation phase in the preset range, according to described
Compensation phase meter calculates to obtain angular velocity axle decomposition amount；
Array acquisition module, for obtaining calculation times, according to the calculation times, preset group number and the angular speed axle
Decomposition amount obtains angular speed axle decomposition amount array；
Calculation times judge module, for judging whether the calculation times are equal to preset times；
Output module, if being equal to the preset times for the calculation times, exports the angular speed axle and decomposes
Amount array.
Alternatively, in the power system stabilizer, PSS excitation parameter optimization system, the array acquisition module includes：
Calculation times judging unit, for judging the calculation times whether more than preset group number；
Memory cell, if being less than or equal to the preset group number for the calculation times, by the angular speed axle point
Solution amount is stored in the angular speed axle decomposition amount array；
Angular speed axle decomposition amount judging unit, if being more than the preset group number for the calculation times, judges described
Whether angular speed axle decomposition amount is more than the minimum value in the angular speed axle decomposition amount array；
Replacement unit, if the angular speed axle decomposition amount is more than the minimum value, institute is replaced with by the minimum value
State angular speed axle decomposition amount.
Alternatively, in the power system stabilizer, PSS excitation parameter optimization method, it is characterised in that the angular speed axle point
Solution amount computing module includes：
Multiplication factor acquiring unit, for obtaining multiplication factor；
Angular speed axle decomposition amount computing unit, described in being drawn according to the multiplication factor and compensation phase meter calculation
Angular speed axle decomposition amount.
From above technical scheme, the application provides a kind of power system stabilizer, PSS excitation parameter optimization method and is
System, the described method comprises the following steps：Electric power system data is obtained, the electric power system data is the initial phase of different frequency
Angle；According to the advanced compensation phase for calculating power system stabilizer, PSS of the electric power system data；Whether judge the compensation phase
Within a preset range；If the compensation phase calculates to obtain angular velocity in the preset range according to the compensation phase meter
Axle decomposition amount；Calculation times are obtained, angular speed is obtained according to the calculation times, preset group number and the angular speed axle decomposition amount
Axle decomposition amount array；Judge whether the calculation times are equal to preset times；If the calculation times are equal to described default time
Number, then export the angular speed axle decomposition amount array.The system includes that data acquisition module, compensation phase meter are calculated module, mended
Repay phase judge module, angular speed axle decomposition amount computing module, array acquisition module, calculation times judge module and output mould
Block.The embodiment of the present application considers phase compensation link same required by code in parameters of power system stabilizer tuning process
When, consider the influence of decomposition amount of the power system stabilizer, PSS gain caused by phase compensation parameter on angular speed axle,
So as to preferably optimize power system stabilizer, PSS excitation parameter, reduce the probability of low-frequency oscillation.
Brief description of the drawings
In order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the application
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also obtain according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of power system stabilizer, PSS excitation parameter optimization method flow chart according to the embodiment of the present application；
Fig. 2 is a kind of angular speed axle decomposition amount array acquisition methods flow chart according to the embodiment of the present application；
Fig. 3 is a kind of angular speed axle decomposition amount computational methods flow chart according to the embodiment of the present application；
Fig. 4 is the result that phase is compensated under different frequency according to the embodiment of the present application；
Fig. 5 is angular speed axle decomposition amount result under different frequency according to the embodiment of the present application；
Fig. 6 is the structured flowchart for optimizing system according to a kind of power system stabilizer, PSS excitation parameter for implementing to exemplify；
Fig. 7 is the structured flowchart according to a kind of array acquisition module for implementing to exemplify；
Fig. 8 is the structured flowchart according to a kind of angular speed axle decomposition amount computing module for implementing to exemplify.
Illustrate：
Wherein, 1- original parameters compensation phase result, first group of Optimal Parameters compensation phase result of 2-, second group of optimization ginseng of 3-
Number compensation phase result, the 3rd group of Optimal Parameters compensation phase result of 4-, 5- original parameter angular speed axle decomposition amount results, 6- first
Group Optimal Parameters angular speed axle decomposition amount result, second group of Optimal Parameters angular speed axle decomposition amount result of 7-, the 3rd group of optimizations of 8-
Parameter angular speed axle decomposition amount result, 10- data acquisition modules, 20- compensation phase meters calculate module, and 30- compensation phase judges mould
Block, 40- angular speed axle decomposition amount computing modules, 50- array acquisition modules, 60- calculation times judge modules, 70- output modules,
41- multiplication factor acquiring units, 42- angular speed axle decomposition amount computing units, 51- calculation times judging units, 52- storages are single
Unit, 53- angular speed axle decomposition amount judging units, 54- replacement units.
Specific embodiment
Refering to Fig. 1, the embodiment of the present application provides a kind of power system stabilizer, PSS excitation parameter optimization method, methods described bag
Include following steps：
Step S100, acquisition electric power system data, the electric power system data is the initial phase angle of different frequency；
Step S200, the compensation phase according to the advanced calculating power system stabilizer, PSS of the electric power system data；
Step S300, judge it is described compensation phase whether within a preset range；
If the compensation phase performs step S400 in the preset range；
Step S400, angular velocity axle decomposition amount is calculated to obtain according to the compensation phase meter；
If the compensation phase continues executing with step S200 not in the preset range；
Step S500, acquisition calculation times, obtain according to the calculation times, preset group number and the angular speed axle decomposition amount
To angular speed axle decomposition amount array；
Step S600, judge the calculation times whether be equal to preset times；
If the calculation times are less than the preset times, step S200 is continued executing with；
If the calculation times are equal to the preset times, step S700 is performed；
Step S700, the output angular speed axle decomposition amount array.
The embodiment of the present application uses PSS-2B models, parameter tuning to select 2 grades of compensation with 3 grades of compensation two schemes.PSS-
2B carries two-stage compensation model, if 2 grades of compensation can not meet requirement, can select 3 grades of compensation models.
It should be noted that preset group number is the final quantity for needing to export Optimal Parameters array.Preset times refer to work as
Phase calculative number of times within a preset range is compensated, preset times are bigger, and parameter optimization effect is better.But need explanation
It is that preset times are bigger, the time of consuming is more long.Therefore, it is appropriate as needed to set preset times.
From above technical scheme, the application provides a kind of power system stabilizer, PSS excitation parameter optimization method, described
Method is comprised the following steps：Obtain electric power system data；According to the advanced calculating power system stabilizer, PSS of the electric power system data
Compensation phase；Whether within a preset range to judge the compensation phase；If the compensation phase is in the preset range,
Angular velocity axle decomposition amount is calculated to obtain according to the compensation phase meter；Calculation times are obtained, according to the calculation times, preset group number
And the angular speed axle decomposition amount obtains angular speed axle decomposition amount array；Judge whether the calculation times are equal to preset times；
If the calculation times are equal to the preset times, the angular speed axle decomposition amount array is exported.The embodiment of the present application exists
Consider that phase compensation link while required by code, considers phase benefit in parameters of power system stabilizer tuning process
The influence of decomposition amount of the power system stabilizer, PSS gain caused by parameter on angular speed axle is repaid, so as to preferably optimize electric power
System stabilizer excitation parameter, reduces the risk of low-frequency oscillation, reduces the probability of low-frequency oscillation.
Alternatively, it is described according to calculating refering to Fig. 1 and Fig. 2 in the power system stabilizer, PSS excitation parameter optimization method
Number of times, preset group number and angular speed axle decomposition amount obtain angular speed axle decomposition amount array to be included：
Step S510, judge the calculation times whether more than preset group number；
If the calculation times are less than or equal to the preset group number, step S521 is performed；
Step S521, the angular speed axle decomposition amount is put into the angular speed axle decomposition amount array, continues executing with step
Rapid S200；
If the calculation times are more than the preset group number, step S520 is performed；
Step S520, judge the angular speed axle decomposition amount whether more than the minimum in the angular speed axle decomposition amount array
Value；
If the angular speed axle decomposition amount is more than the minimum value, step S530 is performed；
Step S530, the minimum value is replaced with into the angular speed axle decomposition amount, continue executing with step S200.
If the angular speed axle decomposition amount is less than or equal to the minimum value, step S200 is continued executing with.
Only need to one group of best Optimal Parameters in the case of normal, i.e., one group maximum angular speed axle decomposition amount, but
Need to rerun to prevent the data of computer export apparent error, so wanting Output speed axle decomposition amount array.
In addition, under correct phase compensation, increasing the gain of PSS, i.e. multiplication factor, the positive damping torque increase that it is provided, but
The increase of PSS gains is not without limitation.The increase of PSS gains, can increase the damping of some electromechanical oscillations, but must
The negative damping of some electromagnetic viscosimeters can be so reduced, power system unstable phenomenon is occurred, it is also possible to other electromechanical oscillations
The damping of device has a negative impact.So the embodiment of the present application final output angular speed axle decomposition amount array, by manually from
Last angular speed axle decomposition amount array selects suitable parameter, can expand the serious forgiveness of parameter optimization, selects more suitably
PSS Optimal Parameters, reduce the probability of low-frequency oscillation.In order to suitable Optimal Parameters can be selected, while operating efficiency is improved, in advance
If group number is usually arranged as 5.
Alternatively, it is described according to compensation phase refering to Fig. 3 in the power system stabilizer, PSS excitation parameter optimization method
Calculating angular speed axle decomposition amount includes：
Obtain multiplication factor；
Calculated according to the multiplication factor and the compensation phase meter and draw the angular speed axle decomposition amount.
The acquisition multiplication factor includes：
The multiplication factor of blocking link, power inertial element, proportional component and lead-lag is obtained respectively, according to transmission letter
Several theories, the multiplication factor of links is multiplied, and obtains the multiplication factor of whole links.It should be noted that the acquisition
In multiplication factor, multiplication factor refers to the multiplication factor of whole links.
Alternatively, in the power system stabilizer, PSS excitation parameter optimization method, it is described according to multiplication factor and compensation phase
Position calculates angular speed axle decomposition amount to be included：
Δ ω=K × cos (α+90)
Wherein, Δ ω is angular speed axle decomposition amount, and K is multiplication factor, and α is compensation phase.
Offset angle is on the basis of-delta (generator rotor angle), to decompose on ω axles, to add 90 °, can be with using this formula
Angular velocity axle decomposition amount is calculated to obtain according to multiplication factor and compensation phase meter, so as to intuitively show the size of integration gain.
Further, in the power system stabilizer, PSS excitation parameter optimization method, the preset range is -120 °~-
80°.Compensation phase will meet -120 °~-80 ° of requirement this angle with mechanical output side in the low-frequency oscillation of electric power system area
To being zero degree, can power oscillation damping phenomenon.Wherein, preset range is -120 °~-80 ° preferably power oscillation damping can show
As.
Further, in the power system stabilizer, PSS excitation parameter optimization method, the frequency is 0.2Hz~2.0Hz.
Due to the Negative damping effect Damping of power system, often appear in weak contact, on remote and heavy load transmission line of electricity, using it is quick,
Generation is easier under conditions of high-amplification-factor excitation system.It is negative, correspondence generator amature that system lacks damping even damping
Between it is relative wave, show and power swing occurred as soon as on transmission line of electricity, damping lacked by system or system negative damping causes
Power swing frequency on transmission line of electricity is general in 0.2Hz~2.0Hz.By taking Yunnan Power System as an example, it is considered to which Yunnan Power System south is main
Net is the actual conditions of Asynchronous Interconnection operation, is 0.6Hz~0.8Hz to Yunnan Power System power plant frequency of oscillation point.For this
Interval frequency band can preferably power oscillation damping phenomenon.
Table 1
Table 1 is according to prior art, that is, when performing step S100 to step S200, the compensation phase knot under different frequency
Really, as can be seen from Table 1：
First, from the analysis of phase compensation result, in the compensation of the frequency band original parameter of below 0.4Hz and first group of Optimal Parameters
Phase falls between -120 °~-80 °, and second group of Optimal Parameters and the 3rd group of Optimal Parameters do not fall within -120 °~-80 ° it
Between, illustrate that original parameter and first group of Optimal Parameters are better than second group of Optimal Parameters and the 3rd group of Optimal Parameters；
Second, three groups of Optimal Parameters remain basically stable in 0.5Hz~0.8Hz band compensation effects；
3rd, by taking Yunnan Power System as an example, it is considered to which Yunnan Power System south major network is the actual conditions of Asynchronous Interconnection operation, to cloud
Southern grid generation factory frequency of oscillation point is 0.6Hz~0.8Hz, for the frequency of oscillation point, with second group of Optimal Parameters and the 3rd
Group Optimal Parameters are compared, original parameter and first group of closer -80 ° of compensation phase of Optimal Parameters, original parameter and first group of optimization
Parameter is slightly good with second group of Optimal Parameters and the 3rd group of Optimal Parameters；
Find out from table 1 and Fig. 4, phase difference is compensated generally from phase compensation result, between four groups of parameters
Less.
Table 2
Under table 2 is same power system data, according to the embodiment of the present application, that is, when performing step S100 to step S400,
The result of the angular speed axle decomposition amount under different frequency.
As can be seen from Table 2：
In 0.8Hz and below 0.8Hz frequency bands, the 3rd group of angular speed axle decomposition amount of Optimal Parameters is generally excellent more than first group
Change parameter and second group of angular speed axle decomposition amount of Optimal Parameters, illustrate the 3rd group of Optimal Parameters better than first group of Optimal Parameters with
Second group of Optimal Parameters；
In 0.4~0.9Hz frequency band ranges, second group of angular speed axle decomposition amount of Optimal Parameters is more than first group of optimization ginseng
Several angular speed axle decomposition amounts, illustrates that second group of Optimal Parameters is better than first group of Optimal Parameters.
Find out from table 2 and Fig. 5, generally from angular speed axle component products, the 3rd group of Optimal Parameters angular speed
Decompose and be significantly greater than original parameter, illustrate that it can be effectively increased its ability to send outside, and reduce the risk of low-frequency oscillation, reduce low frequency
The probability of vibration.
It should be noted that the invention relates to parameter refer to angular speed axle decomposition amount, and relate in the prior art
And parameter refer to compensation phase.
Refering to Fig. 6, the embodiment of the present application provides a kind of power system stabilizer, PSS excitation parameter optimization system, the system bag
Include：
Data acquisition module 10, for obtaining electric power system data, the electric power system data is initial for different frequency
Phase angle；
Compensation phase meter calculates module 20, for according to the advanced benefit for calculating power system stabilizer, PSS of the electric power system data
Repay phase；
Compensation phase judge module 30, for whether within a preset range to judge the compensation phase；
Angular speed axle decomposition amount computing module 40, if for the compensation phase in the preset range, according to institute
State compensation phase meter and calculate to obtain angular velocity axle decomposition amount；
Array acquisition module 50, for obtaining calculation times, according to the calculation times, preset group number and the angular speed
Axle decomposition amount obtains angular speed axle decomposition amount array；
Calculation times judge module 60, for judging whether the calculation times are equal to preset times；
Output module 70, if being equal to the preset times for the calculation times, exports the angular speed axle point
Solution amount array.
From above technical scheme, the application provides a kind of power system stabilizer, PSS excitation parameter optimization system, described
System includes that data acquisition module 10, compensation phase meter calculates module 20, compensation phase judge module 30, angular speed axle and decomposes gauge
Calculate module 40, array acquisition module 50, calculation times judge module 60 and output module 70.The embodiment of the present application is in power system
Consider that phase compensation link while required by code, considers phase compensation parameter institute in stabilizer parameter tuning process
The influence of decomposition amount of the caused power system stabilizer, PSS gain on angular speed axle, so as to preferably optimize power system stability
Device excitation parameter, reduces the probability of low-frequency oscillation.
Alternatively, in the power system stabilizer, PSS excitation parameter optimization system, refering to Fig. 7, the array acquisition module
Including：
Calculation times judging unit 51, for judging the calculation times whether more than preset group number；
Memory cell 52, if being less than or equal to the preset group number for the calculation times, by the angular speed axle
Decomposition amount is stored in the angular speed axle decomposition amount array；
Angular speed axle decomposition amount judging unit 53, if being more than the preset group number for the calculation times, judges institute
Whether angular speed axle decomposition amount is stated more than the minimum value in the angular speed axle decomposition amount array；
Replacement unit 54, if the angular speed axle decomposition amount is more than the minimum value, the minimum value is replaced with
The angular speed axle decomposition amount.
The embodiment of the present application passes through calculation times judging unit 51, memory cell 52, angular speed axle decomposition amount judging unit
53 and replacement unit 54, in preset times, final output contains the array of several relatively large angular speed axle decomposition amounts.Pass through
It is artificial to select suitable parameter from last angular speed axle decomposition amount array, can prevent computer export apparent error data and
Damping to other electromechanical oscillations devices has a negative impact.Expand the serious forgiveness of parameter optimization, select more suitably PSS excellent
Change parameter, reduce the probability of low-frequency oscillation.
Alternatively, in the power system stabilizer, PSS excitation parameter optimization method, refering to Fig. 8, the angular speed axle is decomposed
Amount computing module includes：
Multiplication factor acquiring unit 41, for obtaining multiplication factor；
Angular speed axle decomposition amount computing unit 42, institute is drawn for being calculated according to the multiplication factor and the compensation phase meter
State angular speed axle decomposition amount.
The embodiment of the present application can be more square by multiplication factor acquiring unit 41 and angular speed axle decomposition amount computing unit 42
Just angular speed axle decomposition amount is calculated.
From above technical scheme, the application provides a kind of power system stabilizer, PSS excitation parameter optimization method and is
System, the described method comprises the following steps：Electric power system data is obtained, the electric power system data is the initial phase of different frequency
Angle；According to the advanced compensation phase for calculating power system stabilizer, PSS of the electric power system data；Whether judge the compensation phase
Within a preset range；If the compensation phase calculates to obtain angular velocity in the preset range according to the compensation phase meter
Axle decomposition amount；Calculation times are obtained, angular speed is obtained according to the calculation times, preset group number and the angular speed axle decomposition amount
Axle decomposition amount array；Judge whether the calculation times are equal to preset times；If the calculation times are equal to described default time
Number, then export the angular speed axle decomposition amount array.The system includes that data acquisition module 10, compensation phase meter calculates module
20th, compensation phase judge module 30, angular speed axle decomposition amount computing module 40, array acquisition module 50, calculation times judges mould
Block 60 and output module 70.The embodiment of the present application considers that phase compensation link exists in parameters of power system stabilizer tuning process
While required by code, the power system stabilizer, PSS gain caused by phase compensation parameter is considered on angular speed axle
The influence of decomposition amount, so as to preferably optimize power system stabilizer, PSS excitation parameter, reduces the risk of low-frequency oscillation, reduces low frequency
The probability of vibration.
Those skilled in the art will readily occur to its of the application after considering specification and putting into practice application disclosed herein
Its embodiment.The application is intended to any modification, purposes or the adaptations of the application, these modifications, purposes or
Person's adaptations follow the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.Description and embodiments are considered only as exemplary, and the true scope of the application and spirit are by following
Claim is pointed out.
It should be appreciated that the application is not limited to the precision architecture for being described above and being shown in the drawings, and
And can without departing from the scope carry out various modifications and changes.Scope of the present application is only limited by appended claim.
Claims (9)
1. a kind of power system stabilizer, PSS excitation parameter optimization method, it is characterised in that the described method comprises the following steps：
Electric power system data is obtained, the electric power system data is the initial phase angle of different frequency；
According to the advanced compensation phase for calculating power system stabilizer, PSS of the electric power system data；
Whether within a preset range to judge the compensation phase；
If the compensation phase calculates to obtain angular velocity axle decomposition amount in the preset range according to the compensation phase meter；
Calculation times are obtained, angular speed axle point is obtained according to the calculation times, preset group number and the angular speed axle decomposition amount
Solution amount array；
Judge whether the calculation times are equal to preset times；
If the calculation times are equal to the preset times, the angular speed axle decomposition amount array is exported.
2. power system stabilizer, PSS excitation parameter optimization method according to claim 1, it is characterised in that described according to meter
Number of times, preset group number and angular speed axle decomposition amount is calculated to obtain angular speed axle decomposition amount array and include：
Judge the calculation times whether more than preset group number；
If the calculation times are less than or equal to the preset group number, the angular speed axle decomposition amount is put into the angular speed
In axle decomposition amount array；
If the calculation times are more than the preset group number, judge the angular speed axle decomposition amount whether more than the angular speed
Minimum value in axle decomposition amount array；
If the angular speed axle decomposition amount is more than the minimum value, the minimum value is replaced with into the angular speed axle and is decomposed
Amount.
3. power system stabilizer, PSS excitation parameter optimization method according to claim 1, it is characterised in that described according to benefit
Repaying phase calculation and obtaining angular velocity axle decomposition amount includes：
Obtain multiplication factor；
Calculated according to the multiplication factor and the compensation phase meter and draw the angular speed axle decomposition amount.
4. power system stabilizer, PSS excitation parameter optimization method according to claim 1, it is characterised in that the basis is put
Big multiple and compensation phase meter calculate angular velocity axle decomposition amount includes：
Δ ω=K × cos (α+90)
Wherein, Δ ω is angular speed axle decomposition amount, and K is multiplication factor, and α is compensation phase.
5. power system stabilizer, PSS excitation parameter optimization method according to claim 1, it is characterised in that the frequency is
0.2Hz~2.0Hz.
6. power system stabilizer, PSS excitation parameter optimization method according to claim 1, it is characterised in that the default model
Enclose is -120 °~-80 °.
7. a kind of power system stabilizer, PSS excitation parameter optimizes system, it is characterised in that the system includes：
Data acquisition module, for obtaining electric power system data, the electric power system data is the initial phase angle of different frequency；
Compensation phase meter calculates module, for according to the advanced compensation phase for calculating power system stabilizer, PSS of the electric power system data
Position；
Compensation phase judge module, for whether within a preset range to judge the compensation phase；
Angular speed axle decomposition amount computing module, if for the compensation phase in the preset range, according to the compensation
Phase calculation obtains angular velocity axle decomposition amount；
Array acquisition module, for obtaining calculation times, decomposes according to the calculation times, preset group number and the angular speed axle
Measure angular speed axle decomposition amount array；
Calculation times judge module, for judging whether the calculation times are equal to preset times；
Output module, if being equal to the preset times for the calculation times, exports the angular speed axle decomposition amount number
Group.
8. power system stabilizer, PSS excitation parameter according to claim 7 optimizes system, it is characterised in that the array is obtained
Modulus block includes：
Calculation times judging unit, for judging the calculation times whether more than preset group number；
Memory cell, if being less than or equal to the preset group number for the calculation times, by the angular speed axle decomposition amount
In storing the angular speed axle decomposition amount array；
Angular speed axle decomposition amount judging unit, if being more than the preset group number for the calculation times, judges the angle speed
Whether degree axle decomposition amount is more than the minimum value in the angular speed axle decomposition amount array；
Replacement unit, if the angular speed axle decomposition amount is more than the minimum value, by the angular speed axle decomposition amount array
Minimum value replace with the angular speed axle decomposition amount.
9. power system stabilizer, PSS excitation parameter according to claim 7 optimizes system, it is characterised in that the angular speed
Axle decomposition amount computing module includes：
Multiplication factor acquiring unit, for obtaining multiplication factor；
Angular speed axle decomposition amount computing unit, the angle speed is drawn for being calculated according to the multiplication factor and the compensation phase meter
Degree axle decomposition amount.
Priority Applications (1)
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| CN103956755A (en) * | 2014-04-23 | 2014-07-30 | 国家电网公司 | Design method for power system stabilizer capable of suppressing ultra-low frequency oscillation |
| CN105262115A (en) * | 2015-09-25 | 2016-01-20 | 神华集团有限责任公司 | SEDC controller parameter optimization method and system based on genetic algorithm |
| CN106532741A (en) * | 2016-11-15 | 2017-03-22 | 国家电网公司 | Optimization method of phase compensation link time constants of power system stabilizer |
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| CN103956755A (en) * | 2014-04-23 | 2014-07-30 | 国家电网公司 | Design method for power system stabilizer capable of suppressing ultra-low frequency oscillation |
| CN105262115A (en) * | 2015-09-25 | 2016-01-20 | 神华集团有限责任公司 | SEDC controller parameter optimization method and system based on genetic algorithm |
| CN106532741A (en) * | 2016-11-15 | 2017-03-22 | 国家电网公司 | Optimization method of phase compensation link time constants of power system stabilizer |
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