CN106532742B - A kind of AVR excitation system transfer function model - Google Patents
A kind of AVR excitation system transfer function model Download PDFInfo
- Publication number
- CN106532742B CN106532742B CN201611047727.0A CN201611047727A CN106532742B CN 106532742 B CN106532742 B CN 106532742B CN 201611047727 A CN201611047727 A CN 201611047727A CN 106532742 B CN106532742 B CN 106532742B
- Authority
- CN
- China
- Prior art keywords
- output
- uel
- competing
- control module
- pid control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention relates to a kind of AVR excitation system transfer function model, the model includes pid control module, competing wealthy family, the second inertance element, clipping unit and third inertance element, wherein pid control module is for receiving stator voltage reference value UgrefOutput valve U is adjusted with PSSpss, output voltage values Us is handled by the adjusting of pid control module, passes through higher numerical value in competing wealthy family's output voltage values Us and value of feedback UEL'；The numerical value of competing wealthy family's output is by the time delay of the second inertance element and the clipping output of clipping unit, final output voltage value G (S), to play the purpose of maintenance voltage level.The AVR excitation system transfer function model adds competing wealthy family, and higher numerical value in both Us and UEL can only be selected to avoid U as output valvepssIt is acted on simultaneously with UEL and causes to conflict；Simultaneously to avoid changing switching between Us and UEL frequently, the buffer area of a numerical value Ue range is set.
Description
Technical field
The present invention relates to technical field of electric power system control more particularly to a kind of AVR excitation system transfer function models.
Background technique
AVR exciter control system is the important component of synchronous generator, can be improved the static and dynamic of electric system
State stability can speed up the recovery of network voltage in transient process.Transmission function is to put the control answered inside automation principle
Simulation, the result is that the specific control model of equipment, different transmission functions has shown different defeated as a result, AVR is encouraged of equipment
Magnetic system transmission function has shown the pressure regulation effect of excitation system.
Existing AVR excitation system transfer function model includes the coordinated control of excitation system and each auxiliary link, such as Fig. 1
It is shown, UpssThe value of PSS controlling unit output is represented, UEL represents the low value for encouraging limitation output of exciter control system, PSS and excitation
It is low to encourage limitation coordinated control, it is steady by the deviation of the proportional unit regulating system in pid control module, integral unit elimination system
The change rate of state error, differentiation element regulating system deviation signal, then pid control module is exported by third inertance element
Value is postponed, prevent output result carries out clipping output to output result from being mutated, then by clipping unit, is finally exported
G (S), to play the effect of maintenance voltage level.
But as shown in Fig. 2, work as UpssWhen being acted on simultaneously with UEL, it be easy to cause excitation PSS controlling unit and excitation is low encourages
Conflict between limiting element causes the oscillation of power grid, and then the safety for influencing power grid operates normally.
Summary of the invention
To overcome the problems in correlation technique, the present invention provides a kind of AVR excitation system transfer function model.
AVR excitation system transfer function model provided by the invention includes pid control module, competing wealthy family, the second inertia list
Member, clipping unit and third inertance element, in which:
The pid control module is for receiving stator voltage reference value UgrefOutput valve U is adjusted with PSSpss；
The output end of the pid control module is electrically connected the input terminal of the competing wealthy family, and the competing wealthy family is for comparing
The Us and value of feedback UEL' of the pid control module output；
The output end of the competing wealthy family is electrically connected the input terminal of second inertance element；
The output end of second inertance element is electrically connected the input terminal of the clipping unit；
The clipping unit is used for output voltage values G (S)；
The voltage value G (S) feeds back to the pid control module by the third inertance element.
Preferably, in above-mentioned AVR excitation system transfer function model, the value of feedback UEL', which is that excitation system is low, encourages limitation
The UEL and numerical value Ue sum of module output.
Preferably, in above-mentioned AVR excitation system transfer function model, the pid control module includes proportional unit, integral
Unit and differentiation element, the proportional unit, integral unit and differentiation element are connected in parallel.
Preferably, in above-mentioned AVR excitation system transfer function model, the model further includes first differential unit, described
The output end of integral unit is electrically connected the input terminal of the first differential unit.
Preferably, in above-mentioned AVR excitation system transfer function model, the model further includes the first inertance element, described
The output end of differentiation element is electrically connected the input terminal of first inertance element.
Technical solution provided by the invention can include the following benefits:
AVR excitation system transfer function model provided by the invention includes pid control module, competing wealthy family, the second inertia list
Member, clipping unit and third inertance element, wherein pid control module is for receiving stator voltage reference value UgrefIt is adjusted with PSS
Output valve Upss, output voltage values Us is handled by the adjusting of pid control module, voltage value Us and excitation are selected by competing wealthy family
System is low to encourage in the UEL of limitation module output higher numerical value as output valve, while being to avoid frequently cutting between Us and UEL
It changes, sets the buffer area of a numerical value Ue range；The numerical value of competing wealthy family's output passes through the time delay and limit of the second inertance element
The clipping of width unit exports, final output voltage value G (S), to play the purpose of maintenance voltage level.It is provided by the invention
AVR excitation system transfer function model adds competing wealthy family, by competing wealthy family only export pid control module output voltage value Us and
Higher numerical value in the low UEL for encouraging limitation module feedback of excitation, avoids UpssIt is acted on simultaneously with UEL and causes to conflict, to avoid drawing
The oscillation of power grid is played, and then has ensured the safe and stable operation of power grid；Meanwhile to avoid changing switching frequently between Us and UEL, set
The buffer area of one numerical value Ue range.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without any creative labor, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram for AVR excitation system transfer function model that the prior art provides；
Fig. 2 is a kind of waveform diagram for AVR excitation system transfer function model that the prior art provides；
Fig. 3 is a kind of structural schematic diagram of AVR excitation system transfer function model provided in an embodiment of the present invention；
The specific symbol of Fig. 1-Fig. 3 indicates:
1-PID control module, 11- proportional unit, 12- integral unit, 13- differentiation element, 2- first differential unit, 3-
One inertance element, the competing wealthy family of 4-, the second inertance element of 5-, 6- clipping unit, 7- third inertance element.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
The main function of excitation system is the electricity for maintaining generator or other control points (such as power plant high-voltage side bus)
It is pressed in given level.
Maintenance voltage level is the most important task of exciter control system, there is following 3 main causes:
First, guarantee the safety of Operation of Electric Systems equipment.Running equipment in electric system has its specified operation electricity
Pressure and highest operating voltage.It keeps generator voltage on permissible level, is to guarantee generator and power system device safety
One of primary condition of operation, this requires generator excited systems to be not only able in the quiescent state, and can be after large disturbances
Guarantee generator voltage on given permissible level under stable state.Generator operating standard regulation, large synchronous generator operation
Voltage must not be higher than the 110% of rated value.
Second, guarantee the economy of generator operation.It is most economical that generator is run near rated value.If power generation
Electromechanical drops, then stator current needed for exporting identical power will be increased to increase loss.The large-scale hair of regulation regulation
Motor operation voltage must not be lower than the 90% of rated value；When generator voltage is lower than 95%, generator answers load limit operation.Its
He also has this problem by power equipment.
Third, the requirement for improving the requirement for maintaining generator voltage ability and improving power system stability are in many aspects
It is consistent.Improvement of the exciter control system to steady stability, dynamic stability and transient stability, there is obvious action, Er Qieshi
The simplest, economic and effective measures.
Referring to Fig. 3, the figure shows the basic knots of AVR excitation system transfer function model provided in an embodiment of the present invention
Structure.
AVR excitation system transfer function model provided in an embodiment of the present invention includes PID control model 1, competing wealthy family 4,
Two inertance elements 5, clipping unit 6 and third inertance element 7, in which:
Pid control module 1 is for receiving stator voltage reference value UgrefOutput valve U is adjusted with PSSpss, stator voltage is joined
Examine value UgrefOutput valve U is adjusted with PSSpssProcessing is adjusted, wherein PSS adjusts output valve UpssFor PSS (electric power system stability
Determine device) output voltage value, PSS is the additional link or attached of field regulator automatic channel (automatic voltage regulator AVR)
Feeder apparatus, is swung using the active power of low frequency 0.2-2.5Hz as input, and it is defeated to be superimposed upon AVR after amplification and adjustment phase place
On out, the positive damping of the same effect with Generator Damping winding is generated, offsets and is born caused by the AVR that simple voltage deviation is adjusted
Damping prevents electric system from low-frequency oscillation occur, improves power system dynamic stability.
Further, the stator voltage reference value U of inputgrefOutput valve U is adjusted with PSSpssPass through pid control module 1
Adjustment effect, output voltage values Us.Pid control module 1 includes proportional unit 11, integral unit 12 and differentiation element 13, and is compared
Example unit 11, integral unit 12 and differentiation element 13 are connected in parallel, in which:
Proportional unit 11 is the deviation of reaction system in proportion, plays proportional control action.Once there is deviation in system,
Proportion adjustment generates adjustment effect immediately to reduce deviation.Proportional action is big, can accelerate to adjust, and reduces error, but excessive
Ratio, decline the stability of system, or even cause the unstable of system.
Integral unit 12 is that system is made to eliminate steady-state error, is improved without margin.Because there is error, integral adjustment is just carried out,
Until indifference, integral adjustment stops, and integral adjustment exports a constant value.The power of integral action depends on and integration time constant Ti, Ti
Smaller, integral action is stronger.Otherwise TiBig then integral action is weak, integral adjustment, which is added, so that system stability is declined, dynamic
It responds slack-off.Integral action often in conjunction with other two Rule adjusting, forms pi regulator or PID regulator.
Differentiation element 13 reflects the change rate of system deviation signal, has foresight, can predict the trend of change of error, because
This can generate advanced control action, before deviation is formed not yet, be differentiated adjustment effect elimination.Therefore, Ke Yigai
The dynamic property of kind system.In the case where derivative time selects suitable conditions, it is possible to reduce overshoot reduces regulating time.The differential action
There is an amplification to noise jamming, therefore too strong plus differential is adjusted, it is unfavorable to system rejection to disturbance.In addition, differential reaction is
Change rate, and when input does not change, differential action output is zero.The differential action cannot be used alone, and need and other two
Kind Rule adjusting combines, and forms PD or PID controller.
Further, if the integral action of integral unit 12 is too strong, adjustment effect can be made too strong, causes controlled variable super
It adjusts, or even generates oscillation, therefore to prevent 12 integral action of integral unit too strong, the output end of integral unit 12 is electrically connected single order
Differentiation element 2, for predicting deviation.
Further, if the differential action of differentiation element 13 is too strong, adjustment effect can be made too strong, cause system overshoot and vibration
Swing, thus differentiation element 13 output end be electrically connected the first inertance element 3, play the role of time delay, prevent output result from
Mutation.
Further, the output end of pid control module 1 is electrically connected the input terminal of competing wealthy family 4, and competing wealthy family 4 is for comparing
The low UEL for encouraging limitation module output of the Us and excitation system that pid control module 1 exports, competing wealthy family 4 select Us and UEL wherein compared with
High value is exported, that is to say, that is exported by competing only one numerical value of wealthy family 4, so as to avoid UpssMake simultaneously with UEL
With and cause to conflict, and then ensured the safe and stable operation of power grid.
Further, the U for selecting pid control module 1 to export by competing wealthy family 4sIt is low with excitation system encourage limitation module it is defeated
Higher numerical value output in UEL out, but Us and UEL frequent switching between the two, are unfavorable for the stable operation of power grid in this way, because
This one threshold value of setting, only reaching threshold value could be exported by competing wealthy family 4, specifically: one buffer value Ue of setting, when
When UEL limitation is converted to Us, needing its power is UEL'(UEL'=UEL+Ue) the competing output of wealthy family 4 could be passed through；And Us is converted
When for UEL, it is only necessary to reach UEL, be equivalent to the buffer area of one Ue range of setting in this way.
Further, the output end of competing wealthy family 4 is electrically connected the input terminal of the second inertance element 5, the value that Ji Jing wealthy family 4 exports
By the delayed-action of the second inertance element 5, prevent by the numerical value Us or UEL' of competing wealthy family 4 from being mutated.
It further, is the amplitude of the numerical value Us or UEL' of limitation output, the output end of the second inertance element 5 is electrically connected limit
The input terminal of width unit 6, works as UminThe amplitude < U of the numerical value Us or UEL' of < outputmaxWhen, the width of output numerical value Us or UEL'
Value；As amplitude >=U of the numerical value Us or UEL' of outputmaxWhen, the amplitude of output is Umax；When the width of the numerical value Us or UEL' of output
Value≤Umin, the amplitude of output is Umin。
Further, by the effect of clipping unit 6, final voltage value G (S) is exported, to further decrease voltage
The voltage value G (S) of output is fed back to the input of pid control module 1 using iterative algorithm by deviation by third inertance element 7
End exports final voltage value G (S) until the deviation of voltage is minimized in range.
AVR excitation system transfer function model provided in an embodiment of the present invention includes pid control module 1, competing wealthy family 4,
Two inertance elements 5, clipping unit 6 and third inertance element 7, wherein pid control module 1 is for receiving stator voltage reference value
UgrefOutput valve U is adjusted with PSSpss, output voltage values Us is handled by the adjusting of pid control module 1, is selected by competing wealthy family 4
Voltage value Us and excitation system it is low encourage limitation module output UEL in higher numerical value as output valve, while for avoid Us with
Frequent switching between UEL sets the buffer area of a numerical value Ue range；The numerical value that competing wealthy family 4 exports passes through the second inertance element 5
Time delay and clipping unit 6 clipping output, final output voltage value G (S), to play the mesh of maintenance voltage level
's.AVR excitation system transfer function model provided in an embodiment of the present invention adds competing wealthy family 4, passes through 4 output PID of competing wealthy family
Higher numerical value in the low UEL for encouraging limitation module feedback of the voltage value Us and excitation that control module 1 exports, avoids UpssIt is same with UEL
Shi Zuoyong causes to conflict, to avoid the oscillation for causing power grid, and then has ensured the safe and stable operation of power grid；Meanwhile to keep away
Exempt to change switching between Us and UEL frequently, sets the buffer area of a numerical value Ue range.
Those skilled in the art will readily occur to of the invention its after considering specification and the disclosure invented here of practice
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (5)
1. a kind of AVR excitation system transfer function model, which is characterized in that including pid control module (1), competing wealthy family (4),
Two inertance elements (5), clipping unit (6) and third inertance element (7), in which:
The pid control module (1) is for receiving stator voltage reference value UgrefOutput valve U is adjusted with PSSpss；
The output end of the pid control module (1) is electrically connected the input terminal of the competing wealthy family (4), and the competing wealthy family (4) is used for
Compare the Us and value of feedback UEL' of the pid control module (1) output；
The output end of the competing wealthy family (4) is electrically connected the input terminal of second inertance element (5)；
The output end of second inertance element (5) is electrically connected the input terminal of the clipping unit (6)；
The clipping unit (6) is used for output voltage values G (S)；
The voltage value G (S) feeds back to the pid control module (1) by the third inertance element (7).
2. AVR excitation system transfer function model according to claim 1, which is characterized in that the value of feedback UEL' is
The low UEL and numerical value Ue sum for encouraging limitation module output of excitation system.
3. AVR excitation system transfer function model according to claim 1, which is characterized in that the pid control module
It (1) include proportional unit (11), integral unit (12) and differentiation element (13), the proportional unit (11), integral unit (12)
It is connected in parallel with differentiation element (13).
4. AVR excitation system transfer function model according to claim 3, which is characterized in that the model further includes one
Rank differentiation element (2), the output end of the integral unit (12) are electrically connected the input terminal of the first differential unit (2).
5. AVR excitation system transfer function model according to claim 3, which is characterized in that the model further includes
One inertance element (3), the output end of the differentiation element (13) are electrically connected the input terminal of first inertance element (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611047727.0A CN106532742B (en) | 2016-11-23 | 2016-11-23 | A kind of AVR excitation system transfer function model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611047727.0A CN106532742B (en) | 2016-11-23 | 2016-11-23 | A kind of AVR excitation system transfer function model |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106532742A CN106532742A (en) | 2017-03-22 |
| CN106532742B true CN106532742B (en) | 2019-07-30 |
Family
ID=58357967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611047727.0A Active CN106532742B (en) | 2016-11-23 | 2016-11-23 | A kind of AVR excitation system transfer function model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106532742B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359833B (en) * | 2017-07-26 | 2019-09-24 | 云南电力试验研究院(集团)有限公司 | A kind of synchronous generator static excitation control method and system |
| CN108023518B (en) * | 2017-11-16 | 2020-05-29 | 云南电网有限责任公司电力科学研究院 | Excitation regulator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516274A (en) * | 2013-09-26 | 2014-01-15 | 国家电网公司 | Generator excitation system comprising multi-type limiting units |
| CN103516278A (en) * | 2013-09-26 | 2014-01-15 | 国家电网公司 | Excitation system full-function-performance simulation system based on MATLAB |
-
2016
- 2016-11-23 CN CN201611047727.0A patent/CN106532742B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516274A (en) * | 2013-09-26 | 2014-01-15 | 国家电网公司 | Generator excitation system comprising multi-type limiting units |
| CN103516278A (en) * | 2013-09-26 | 2014-01-15 | 国家电网公司 | Excitation system full-function-performance simulation system based on MATLAB |
Non-Patent Citations (1)
| Title |
|---|
| 大型同步发电机组励磁系统的PSASP建模及仿真;万黎等;《湖北电力》;20160331;第40卷(第3期);61-65 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106532742A (en) | 2017-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9590550B2 (en) | Systems and methods for adaptive control of excitation and generator systems | |
| CN105917542B (en) | Wind power plant, wind farm, method for operating the wind power plant, and control and/or regulation device | |
| US9318988B2 (en) | System and method for voltage control of wind generators | |
| CN106532742B (en) | A kind of AVR excitation system transfer function model | |
| Veinović et al. | Optimized four-parameter PID controller for AVR systems with respect to robustness | |
| CN110752608B (en) | Method and device for switching PID (proportion integration differentiation) parameters of speed regulating system of hydroelectric generating set and storage medium | |
| US7269039B2 (en) | Method and device for producing rectifier gating signals using feed forward control | |
| CN108023518B (en) | Excitation regulator | |
| CN112072633B (en) | JD self-adaption-based virtual direct current generator control method and system | |
| Saleem et al. | Adaptive collaborative speed control of PMDC motor using hyperbolic secant functions and particle swarm optimization | |
| Vikhram et al. | Design of Power System Stabilizer for Power System Damping Improvement with Multiple Design Requirements | |
| JP4030497B2 (en) | Power system | |
| Tabassum et al. | Design an optimal LQG control for maintaining nominal frequency of a single area power system | |
| Bruha | Importance of control engineering to minimize torsional vibration in variable speed drive systems | |
| Seo et al. | Reinterpretation of disturbance observer as an add-on controller | |
| Suguna | Damping of low-frequency oscillations using swarm optimized controller for SMIB system | |
| Zhao et al. | Closed-Form Solutions for Grid-Forming Converters: A Design-Oriented Study | |
| Nguyen et al. | Hardware-in-the-loop test for automatic voltage regulator of synchronous condenser | |
| Barik et al. | Design and comparison of power system stabilizer by conventional and robust H∞ loop shaping technique | |
| CN117200360B (en) | High-low voltage ride through control method and system for self-synchronous voltage source type double-fed wind turbine generator | |
| Stojic et al. | Voltage Controller for a Synchronous Generator with Exciter | |
| CN115622085B (en) | Economic frequency modulation method, device, equipment and medium based on energy storage capacity of unit | |
| Mekhanet et al. | Online Self-Tuning Power System Stabilizer Based on the Speed Gradient | |
| Balestrino et al. | Variable structure conventional controllers | |
| Vinothkumar et al. | MATLAB/Simlink Based Power System Stabilizer with PID controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |