CN106326529B - A kind of checking system and method for hydroelectric units primary frequency modulation contributing electricity - Google Patents
A kind of checking system and method for hydroelectric units primary frequency modulation contributing electricity Download PDFInfo
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- CN106326529B CN106326529B CN201610648154.0A CN201610648154A CN106326529B CN 106326529 B CN106326529 B CN 106326529B CN 201610648154 A CN201610648154 A CN 201610648154A CN 106326529 B CN106326529 B CN 106326529B
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Abstract
The invention discloses the checking systems and method of a kind of hydroelectric units primary frequency modulation contributing electricity, obtain theoretical active power including the use of Hydropower Unit simulation model；Then theoretical movement device electricity calculates module according to theoretical active power, theoretical active power corresponding time and theoretical movement device electricity relational expression obtain the theoretical movement device electricity of hydroelectric units primary frequency modulation, theory movement device electricity calculates actual power of the module according to Hydropower Unit, the actual power corresponding time obtains the actual act device electricity of hydroelectric units primary frequency modulation, evaluation module, for calculating actual act device electricity to the ratio of theoretical movement device electricity, and judge whether ratio is greater than preset threshold, if it is, then the secondary primary frequency modulation of Hydropower Unit passes through examination, otherwise, examination is not passed through then.Since the theoretical movement device electricity and actual act device electricity that are obtained using which are closer, also more accurate, therefore, the result of appraisal are also more accurate, and error rate is low.
Description
Technical field
The present invention relates to hydroelectric units primary frequency modulation technical fields, contribute more particularly to a kind of hydroelectric units primary frequency modulation
The checking system and method for electricity.
Background technique
Currently, mains frequency accounts for major part in the factor for influencing power quality.Hydroelectric units primary frequency modulation, which refers to, works as
When mains frequency fluctuates, speed-regulating system automatically adjusts guide vane opening according to mains frequency and the difference on the frequency of rated frequency, changes
Become unit output to adapt to load variations.Primary frequency modulation service is that grid requirements power plant is necessary as one of basic ancillary service
The service of offer.If power plant because primary frequency modulation service that self reason cannot provide primary frequency modulation service or offer is not up to standard will
It is examined.Power generating capacity is correspondingly reduced according to the result of examination, finally influences its economic benefit.
It is traffic department in mains frequency beyond adjusting in the prior art to the examination of institute's contributing electricity after primary frequency modulation movement
The numbers such as the actual power of Hydropower Unit sent in actuation time, power grid real-time frequency and power plant instantly are recorded when frequency dead zone range
According to according to these data, using examining, formula calculates separately out the theoretical movement device electricity of unit and actual act integrates electricity
Then whether qualified amount judges quality of movement further according to actual act device electricity and theoretical movement device electricity, and determines
Whether power plant will be examined.
Actual act device electricity is calculated as shown in formula (1):
In formula: Qr is actual act device electricity (unit: kWh)；t0To integrate initial time, i.e. frequency departure is more than
At the time of frequency dead band (unit: s)；Δ t be integral start after primary frequency modulation process duration (no longer than 60s, surpass
Cross calculating with 60s for 60s, unit: s)；PaFor the practical power output (unit: kW) of unit；P0For the corresponding unit of integral initial time
It contributes (unit: kW).
Theory movement device electricity is calculated as shown in formula (2):
In formula: QtDevice electricity (unit: kWh) is acted for theory；Pr is unit nominal output (unit: kW)；t0And Δ
The meaning of t is same as described above；Δ f is frequency departure；4% is the speed governor droop (permanent droop) of unit.
Wherein, the calculation formula of frequency deviation f are as follows:
In formula: fg is the frequency (unit: Hz) of Hydropower Unit；Fr is power grid rated frequency (unit: Hz)；efOnce to adjust
Frequency dead zone (unit: Hz).
By formula (1), (2) it is found that actual act device electricity is calculated according to active power-time curve,
And theoretical movement device electricity is calculated according to frequency-time curve.Theoretical device electricity changes in real time with frequency difference
Become, and Hydropower Unit regulating system hysteresis quality is stronger, power response is relatively slow, and due to hydrodynamic inertial, is adjusting
Initial stage will appear anti-tune effect, will all cause actual act device electricity in same time period less than normal compared with theoretical value.Extreme case
Under, when frequency disturbance is a step amount, frequency-time curve is a broken line, and active power-time relationship is bent
Line is a curve, as shown in Figure 1, t0Moment frequency disturbance -0.15Hz, unit frequency difference exceeds Man made Dead Band, through of short duration
Delay primary frequency modulation starts to act, and occurs demodulating effect at guide vane movement initial stage due to hydrodynamic inertial, in Fig. 1 (c)
t0-t1Period, unit is that opposite direction goes out force-responsive at this time, and actual integration electricity is negative value.t1After moment, unit output switchs to
Positive direction, actual integration electricity gradually become positive value.Dash area is theoretical movement device electricity, yin in Fig. 1 (c) in Fig. 1 (b)
Shadow part is actual act device electricity, it can be seen that theoretical larger with actual value error in calculating process.This explanation frequency
It is inaccurate that rate-time curve, which carrys out computational theory movement device electricity,.If the reason being calculated according to this kind of mode
If examining by movement device electricity to the primary frequency modulation of power grid, it is easy to appear the primary frequency modulation of actually Hydropower Unit
Correct movement, but the device electricity contributed in action process is registered as being unsatisfactory for requiring such case, so that examination misses
Rate is high.
Therefore, the accuracy of the checking system and method that how to improve hydroelectric units primary frequency modulation contributing electricity is this field
The current technical issues that need to address of technical staff.
Summary of the invention
The object of the present invention is to provide a kind of checking systems of hydroelectric units primary frequency modulation contributing electricity, according to Hydropower Unit
Simulation model obtain the theoretical active power of Hydropower Unit, and theory is obtained using theoretical active power and the relationship of time
Device electricity is acted, then according to the theoretical movement device electricity and actual act device electricity obtained in the way of this kind to water power
The primary frequency modulation of unit is examined, since the theoretical movement device electricity obtained using which is more accurate, examination
As a result also more accurate, error rate is low；It is a further object of the present invention to provide a kind of hydroelectric units primary frequency modulation contributing electricities
Wire examination method.
In order to solve the above technical problems, the present invention provides a kind of examination systems of hydroelectric units primary frequency modulation contributing electricity
System, comprising:
Hydropower Unit simulation model, for being obtained according to frequency departure and active power deviation or guide vane opening deviation
The theoretical active power of the Hydropower Unit；Wherein, the frequency departure is that frequency Setting signal subtracts the Hydropower Unit
The numerical value that the difference that frequency obtains obtains after dead zone is handled, the active power deviation are that given theoretical active power subtracts
The difference that the theoretical active power of the Hydropower Unit obtains；The guide vane opening deviation is that given guide vane opening subtracts the water
The difference that the guide vane opening of motor group obtains；
Theory movement device electricity calculates module, for according to the theoretical active power, the theoretical active power pair
The time and theoretical movement device electricity relational expression answered obtain the theoretical movement device electricity of hydroelectric units primary frequency modulation,
In, the theoretical movement device electricity relational expression are as follows:
Wherein, QtFor the theoretical movement device electricity；t0At the time of for frequency departure overfrequency dead zone；Δ t is integral
Primary frequency modulation process duration after beginning, wherein Δ t is no longer than 60s, more than being calculated with 60s for 60s；Pt is institute
State theoretical active power；P0For t0Corresponding theory active power；
Actual act device electricity calculates module, for actual power, the actual power according to the Hydropower Unit
The corresponding time obtains the actual act device electricity of hydroelectric units primary frequency modulation；
Evaluation module, for calculating the actual act device electricity to the ratio of the theoretical movement device electricity, and
Judge whether the ratio is greater than preset threshold, if it is, the secondary primary frequency modulation of the Hydropower Unit is by examination, it is no
Then, then examination is not passed through.
Preferably, the Hydropower Unit simulation model includes:
Electronic controller model, for obtaining institute according to frequency departure and active power deviation or guide vane opening deviation
State the target guide vane opening signal of Hydropower Unit；
Guide vane actuating mechanism model, for obtaining practical guide vane opening signal according to the target guide vane opening signal；
Hydraulic turbine prime mover model, for obtaining the theoretical active power according to the practical guide vane opening signal.
Preferably, the electronic controller model is specifically used for:
The frequency for receiving frequency Setting signal and Hydropower Unit, to the frequency Setting signal and the Hydropower Unit
Frequency is made the difference, and is carried out dead zone to obtained difference and handled to obtain the frequency departure；
Carry out the first ratio processing and the first differential process respectively to the frequency departure, it is corresponding to obtain the first numerical value and the
Two numerical value；
By active power deviation and power difference coefficient carry out multiplication processing or by guide vane opening deviation and aperture tune it is poor
Coefficient carries out multiplication processing, obtains third value；
The third value is added processing with the frequency departure, the first product is carried out to the result that addition is handled
Divide processing, obtains the 4th numerical value；
Addition processing is done to first numerical value, the second value and the 4th numerical value, obtains the 5th numerical value；
First amplitude limiting processing is carried out to the 5th numerical value, obtains the target guide vane opening signal；
It is K that first ratio, which handles corresponding transmission function,p, the corresponding transmission function of first differential process isThe first integral handles corresponding transmission functionWherein, KpFor the first proportional gain, KIFor the first product
Divide gain, KDFor first differential gain, T1VFor the first derivative time constant.
Preferably, the guide vane actuating mechanism model is specifically used for:
The target guide vane opening signal and currently practical guide vane opening signal are made the difference, and to obtained difference
Value carries out the second ratio processing, second integral processing and the second differential process respectively, then three obtained numerical value is carried out the
Two amplitude limiting processings, and the result obtained to the second amplitude limiting processing integrates, then carries out third amplitude limiting processing to the result of integral,
Obtain the practical guide vane opening signal；
Wherein, it is K that second ratio, which handles corresponding transmission function,p', the second integral handles corresponding transmitting letter
Number isThe corresponding transmission function of second differential process is KD' S, wherein the Kp' it is the second proportional gain, KI' be
Second integral gain, KD' it is second differential gain.
Preferably, the corresponding transmission function relationship of hydraulic turbine prime mover model is G1(s)+G2(s), in which:
TwFor fluid inertia time constant；
G2(s) corresponding equation is P=aY3+bY2+ cY+d, a, b, c and d are constant.
Preferably, hydraulic turbine prime mover model is the ideal hydraulic turbine model for only considering rigid water attack, the water wheels
The corresponding transmission function relationship of machine prime mover model are as follows:
Wherein, TwFor fluid inertia time constant.
In order to solve the above technical problems, the present invention also provides a kind of examination sides of hydroelectric units primary frequency modulation contributing electricity
Method, comprising:
Hydropower Unit simulation model obtains described according to frequency departure and active power deviation or guide vane opening deviation
The theoretical active power of Hydropower Unit；Wherein, the frequency departure is the frequency that frequency Setting signal subtracts the Hydropower Unit
The numerical value that obtained difference obtains after dead zone is handled, the active power deviation are described in given theoretical active power subtracts
The difference that the theoretical active power of Hydropower Unit obtains；The guide vane opening deviation is that given guide vane opening subtracts the hydroelectric machine
The difference that the guide vane opening of group obtains；
When theory movement device electricity calculating module is corresponding according to the theoretical active power, the theory active power
Between and theoretical movement device electricity relational expression obtain the theoretical movement device electricity of hydroelectric units primary frequency modulation, wherein it is described
Theory movement device electricity relational expression are as follows:
Wherein, QtFor the theoretical movement device electricity；t0At the time of for frequency departure overfrequency dead zone；Δ t is integral
Primary frequency modulation process duration after beginning, wherein Δ t is no longer than 60s, more than being calculated with 60s for 60s；Pt is institute
State theoretical active power；P0For t0Corresponding theory active power；
It is corresponding according to actual power, the actual power of the Hydropower Unit that actual act device electricity calculates module
Time obtains the actual act device electricity of hydroelectric units primary frequency modulation；
Evaluation module calculates the actual act device electricity to the ratio of the theoretical movement device electricity, and judges institute
State whether ratio is greater than preset threshold, if it is, the secondary primary frequency modulation of the Hydropower Unit passes through examination, otherwise, then not
Pass through examination.
Preferably, the Hydropower Unit simulation model includes electronic controller model, guide vane actuating mechanism model and water
Turbine prime mover model, it is described to obtain the hydroelectric machine according to frequency departure and active power deviation or guide vane opening deviation
The process of the theoretical active power of group specifically:
The electronic controller model obtains institute according to frequency departure and active power deviation or guide vane opening deviation
State the target guide vane opening signal of Hydropower Unit；
The guide vane actuating mechanism model obtains practical guide vane opening signal according to the target guide vane opening signal；
Hydraulic turbine prime mover model obtains the theoretical active power according to the practical guide vane opening signal.
Preferably, described to obtain the hydroelectric machine according to frequency departure and active power deviation or guide vane opening deviation
The process of the target guide vane opening signal of group specifically:
The frequency for receiving frequency Setting signal and Hydropower Unit, to the frequency Setting signal and the Hydropower Unit
Frequency is made the difference, and is carried out dead zone to obtained difference and handled to obtain the frequency departure；
Carry out the first ratio processing and the first differential process respectively to the frequency departure, it is corresponding to obtain the first numerical value and the
Two numerical value；
By active power deviation and power difference coefficient carry out multiplication processing or by guide vane opening deviation and aperture tune it is poor
Coefficient carries out multiplication processing, obtains third value；
The third value is added processing with the frequency departure, the first product is carried out to the result that addition is handled
Divide processing, obtains the 4th numerical value；
Addition processing is done to first numerical value, the second value and the 4th numerical value, obtains the 5th numerical value；
First amplitude limiting processing is carried out to the 5th numerical value, obtains the target guide vane opening signal；
It is K that first ratio, which handles corresponding transmission function,p, the corresponding transmission function of first differential process isThe first integral handles corresponding transmission functionWherein, KpFor the first proportional gain, KIFor the first product
Divide gain, KDFor first differential gain, T1VFor the first derivative time constant.
It is preferably, described to obtain the process of practical guide vane opening signal according to the target guide vane opening signal specifically:
The target guide vane opening signal and currently practical guide vane opening signal are made the difference, and to obtained difference
Value carries out the second ratio processing, second integral processing and the second differential process respectively, then three obtained numerical value is carried out the
Two amplitude limiting processings, and the result obtained to the second amplitude limiting processing integrates, then carries out third amplitude limiting processing to the result of integral,
Obtain the practical guide vane opening signal；
Wherein, it is K that second ratio, which handles corresponding transmission function,p', the second integral handles corresponding transmitting letter
Number isThe corresponding transmission function of second differential process is KD' S, wherein the Kp' it is the second proportional gain, KI' be
Second integral gain, KD' it is second differential gain.
The present invention provides the checking systems and method of a kind of hydroelectric units primary frequency modulation contributing electricity, including the use of water power
Unit simulation model obtains theoretical active power；Then theoretical movement device electricity calculates module according to theoretical active power, reason
The theoretical movement of hydroelectric units primary frequency modulation is obtained by active power corresponding time and theoretical movement device electricity relational expression
Device electricity, theory movement device electricity calculate module and obtain according to actual power, the actual power corresponding time of Hydropower Unit
To the actual act device electricity of hydroelectric units primary frequency modulation, evaluation module, for calculating actual act device electricity to theory
The ratio of device electricity is acted, and judges whether ratio is greater than preset threshold, if it is, the secondary primary frequency modulation of Hydropower Unit
By examination, otherwise, then examination is not passed through.
As it can be seen that the simulation model that the present invention is first depending on Hydropower Unit obtains the theoretical active power of Hydropower Unit, and adopt
Theoretical movement device electricity is obtained with the relationship of theoretical active power and time, then according to the theory obtained in the way of this kind
Movement device electricity is examined with primary frequency modulation of the actual act device electricity to Hydropower Unit, due to being obtained using which
Theoretical movement device electricity and actual act device electricity it is closer, also more accurately, therefore, the result of appraisal are also more quasi-
Really, error rate is low, avoids the status for examining compliance rate low using original calculation method bring primary frequency modulation.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the comparison diagram of theoretical movement device electricity and actual act device electricity under step disturbance in the prior art；
Fig. 2 is that the present invention provides a kind of structural schematic diagrams of the checking system of hydroelectric units primary frequency modulation contributing electricity；
Fig. 3 is a kind of block diagram of electronic controller model provided by the invention；
Fig. 4 is a kind of block diagram of guide vane actuating mechanism model provided by the invention；
Fig. 5 is a kind of block diagram of hydraulic turbine prime mover model provided by the invention；
Fig. 6 is a kind of block diagram of Francis turbine model provided by the invention；
Fig. 7 is a kind of block diagram of hydraulic turbine prime mover model provided by the invention；
Fig. 8 is a kind of structural block diagram of the checking system of hydroelectric units primary frequency modulation contributing electricity provided by the invention；
Fig. 9 is the calculating using method computational theory in the prior art movement device electricity and actual act device electricity
Schematic diagram；
Figure 10 is that a kind of system-computed theory provided by the invention is used to act device electricity and actual act device electricity
Calculating schematic diagram；
Figure 11 is to act device electricity and actual act integral electricity using another system-computed theory provided by the invention
The calculating schematic diagram of amount；
Figure 12 is a kind of process of the process of the wire examination method of hydroelectric units primary frequency modulation contributing electricity provided by the invention
Figure.
Specific embodiment
Core of the invention is to provide a kind of checking system of hydroelectric units primary frequency modulation contributing electricity, according to Hydropower Unit
Simulation model obtain the theoretical active power of Hydropower Unit, and theory is obtained using theoretical active power and the relationship of time
Device electricity is acted, then according to the theoretical movement device electricity and actual act device electricity obtained in the way of this kind to water power
The primary frequency modulation of unit is examined, since the theoretical movement device electricity obtained using which is more accurate, examination
As a result also more accurate, error rate is low；Another core of the invention is to provide a kind of hydroelectric units primary frequency modulation contributing electricity
Wire examination method.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to figure 2., Fig. 2 is that the present invention provides a kind of knots of the checking system of hydroelectric units primary frequency modulation contributing electricity
Structure schematic diagram, the system include:
Hydropower Unit simulation model 1, for being obtained according to frequency departure and active power deviation or guide vane opening deviation
To the theoretical active power of Hydropower Unit；Wherein, what the frequency that frequency departure subtracts Hydropower Unit for frequency Setting signal obtained
The numerical value that difference obtains after dead zone is handled, active power deviation are the theory that given theoretical active power subtracts Hydropower Unit
The difference that active power obtains；Guide vane opening deviation is that given guide vane opening subtracts the difference that the guide vane opening of Hydropower Unit obtains
Value；
Preferably, Hydropower Unit simulation model 1 includes:
Electronic controller model, for obtaining water according to frequency departure and active power deviation or guide vane opening deviation
The target guide vane opening signal of motor group；
Guide vane actuating mechanism model, for obtaining practical guide vane opening signal according to target guide vane opening signal；
Hydraulic turbine prime mover model, for obtaining theoretical active power according to practical guide vane opening signal.
Specifically, referring to figure 3., Fig. 3 is a kind of block diagram of electronic controller model provided by the invention.
Preferably, electronic controller model is specifically used for:
The frequency for receiving frequency Setting signal and Hydropower Unit carries out the frequency of frequency Setting signal and Hydropower Unit
It makes the difference, and dead zone is carried out to obtained difference and handles to obtain frequency departure；
In conjunction with Fig. 3 it is found that fdFor speed dead bend.And the f in figurecFor frequency Setting signal, when the model to Hydropower Unit into
When row simulation, fcEqual to power grid rated frequency 50Hz；fgFor the frequency of Hydropower Unit.
Carry out the first ratio processing and the first differential process respectively to frequency departure, it is corresponding to obtain the first numerical value and the second number
Value；
By active power deviation and power difference coefficient carry out multiplication processing or by guide vane opening deviation and aperture tune it is poor
Coefficient carries out multiplication processing, obtains third value；
Pg、PcThe respectively theoretical active power of Hydropower Unit and given theoretical active power；Yg、YcRespectively water power
The guide vane opening of unit and given guide vane opening.Wherein, when selecting active power deviation to participate in adjusting, then bp at this time is
Power difference coefficient, when selecting guide vane opening deviation remnants to adjust, then bp at this time is aperture difference coefficient, which has been selected
It participates in adjusting, which product with its coefficient is as third value.
It should be noted that P heregNamely P cited belowt, YgNamely Y cited belowPID。
Third value is added processing with frequency departure, first integral processing is carried out to the result that addition is handled,
Obtain the 4th numerical value；
Addition processing is done to the first numerical value, second value and the 4th numerical value, obtains the 5th numerical value；
First amplitude limiting processing is carried out to the 5th numerical value, obtains target guide vane opening signal；
YPIDmax, YPIDmin are respectively that electronic controller model 1 carries out the output upper limit of the first amplitude limiting processing, lower limit,
Y in figurePIDAs target guide vane opening signal.
The corresponding transmission function of first ratio processing is Kp, the corresponding transmission function of the first differential process isThe
The corresponding transmission function of one Integral Processing isWherein, KpFor the first proportional gain, KIFor first integral gain, KDIt is first
The differential gain, T1VFor the first derivative time constant.
Specifically, referring to figure 4., Fig. 4 is a kind of block diagram of guide vane actuating mechanism model provided by the invention.
Preferably, guide vane actuating mechanism model is specifically used for:
Target guide vane opening signal and currently practical guide vane opening signal are made the difference, and to obtained difference point
The second ratio processing, second integral processing and the second differential process are not carried out, then three obtained numerical value is subjected to the second limit
Width processing, and the result obtained to the second amplitude limiting processing integrates, then carries out third amplitude limiting processing to the result of integral, obtains
Practical guide vane opening signal；
Wherein, it is K that the second ratio, which handles corresponding transmission function,p', the corresponding transmission function of second integral processing is
The corresponding transmission function of second differential process is KD' S, wherein Kp' it is the second proportional gain, KI' it is second integral gain, KD'
For second differential gain.
It is understood that guide vane actuating mechanism model 2 here is alternatively referred to as electrohydraulic servo system modeling, in the model
PID arithmetic be Hydropower Unit regulating system inner loop PID control link.
In figure, Y is practical guide vane opening signal (namely servomotor stroke signal), vmaxFor opening speed clipping；vmin1、
vmin2For closing velocity clipping (two sections of closings)；Ty is the reaction time constant of guide vane main servomotor；Ymax, Ymin-guide vane master
Range, the minimum stroke of guide vane main servomotor of servomotor；Ydelay-guide vane actuating mechanism output delay time
(second).
Preferably, the corresponding transmission function relationship of hydraulic turbine prime mover model is G1(s)+G2(s), in which:
TwFor fluid inertia time constant；
G2(s) corresponding equation is P=aY3+bY2+ cY+d, a, b, c and d are constant.
Specifically, referring to figure 5. and Fig. 6, wherein Fig. 5 is a kind of frame of hydraulic turbine prime mover model provided by the invention
Figure, Fig. 6 are a kind of block diagram of Francis turbine model provided by the invention.
Because the present invention wants to simulate Hydropower Unit in practice by the simulation model of Hydropower Unit, and then
The theoretical active power exported to Hydropower Unit, therefore, select here not only allow for rigid water attack, also contemplate it is theoretical active
Ideal hydraulic turbine prime mover model of corresponding relationship between power and guide vane opening.
In Fig. 6, q is flow relative standard deviation values, and h is head relative standard deviation values, G1(S) be q to h transmission function, eh with
Ey (namely G2It (S)) is respectively carry-over factor of the hydraulic turbine torque (power) to head and guide vane servomotor stroke, eqh and eqy
Respectively carry-over factor of the hydraulic turbine discharge to head and guide vane servomotor stroke.
In addition, G commonly used in the prior art2(s) corresponding equation is P=aY3+bY2+ cY+d namely theoretical active power
It can be with the fit correlation formula (parameter has marked change) of main servomotor stroke are as follows:
P=-0.7269Y3+0.8581Y 2+1.0536Y-0.1808
It can be with are as follows:
P=-7.5728Y3+11.641Y 2-3.2838Y+0.2382；
It can be with are as follows:
P=-3.2377Y3+3.9267Y2+0.2278Y-0.1530。
Certainly, G here2(s) concrete form of corresponding equation is determined according to the actual situation, and the present invention is not spy herein
Other restriction.
Preferably, hydraulic turbine prime mover model is the ideal hydraulic turbine model for only considering rigid water attack, and the hydraulic turbine is former
The corresponding transmission function relationship of Motivation Model are as follows:
Wherein, TwFor fluid inertia time constant.
Specifically, Fig. 7 is please referred to, Fig. 7 is a kind of block diagram of hydraulic turbine prime mover model provided by the invention.
Because the present invention wants to simulate Hydropower Unit in practice by the simulation model of Hydropower Unit, and then
Therefore the theoretical active power exported to Hydropower Unit selects the ideal hydraulic turbine prime mover mould for only considering rigid water attack here
Type.
The present invention comes according to the actual situation for specifically selecting which kind of hydraulic turbine prime mover model not to be particularly limited
It is fixed.
Theory movement device electricity calculates module 2, for according to theoretical active power, theoretical active power corresponding time
And theoretical movement device electricity relational expression obtains the theoretical movement device electricity of hydroelectric units primary frequency modulation, wherein theory is dynamic
Make device electricity relational expression are as follows:
Wherein, QtDevice electricity is acted for theory；t0At the time of for frequency departure overfrequency dead zone；Δ t is that integral starts
Primary frequency modulation process duration afterwards, wherein Δ t is no longer than 60s, more than being calculated with 60s for 60s；Pt has for theory
Function power；P0For t0Corresponding theory active power；
Specifically, the water constituted for electronic controller model, guide vane actuating mechanism model and ideal hydraulic turbine model
Motor group speed-regulating system simulation model, the input of model be frequency Setting signal, the machine frequency letter of simulation, active power deviation or
Guide vane opening deviation, is computed and obtains frequency difference, carries out PID arithmetic through frequency dead band link, then export through PID output violent change link
PID adjustment signal inputs the inner loop PID loop section in guide vane actuating mechanism, opens through inner loop PID output, guide vane, closes speed limit ring
Section carries out integral operation in conjunction with guide vane servomotor time constant, believes through the practical guide vane opening of servomotor amplitude limit link output guide blade
Number, hydraulic turbine model is inputted, power of the assembling unit output is finally calculated.The model meets practical and can accurately emulate Hydropower Unit one
The process of secondary frequency modulation obtains and active power simulation curve similar in measured result variation tendency.
Actual act device electricity calculates module 3, when corresponding for actual power, the actual power according to Hydropower Unit
Between obtain the actual act device electricity of hydroelectric units primary frequency modulation；
Here actual act device electricity is calculated using calculation method in the prior art.
Evaluation module 4 for calculating actual act device electricity to the ratio of theoretical movement device electricity, and judges ratio
Whether preset threshold is greater than, if it is, otherwise the secondary primary frequency modulation of Hydropower Unit, does not then pass through examination by examination.
Specifically, preset threshold here can be 50%, it is of course also possible to be other numerical value, the present invention is not done herein
It is special limit, determine according to the actual situation.
Specifically, Fig. 8 is please referred to, Fig. 8 is a kind of examination of hydroelectric units primary frequency modulation contributing electricity provided by the invention
The structural block diagram of system.
The beneficial effect generated using system provided by the invention is compared with the prior art below with reference to specific example
Compared with:
The unit primary frequency modulation test measured data of certain hydroelectric power plant 1 is selected, original method can be used according to frequency-time relationship
Computational theory acts device electricity, can calculate actual act device electricity according to active power-time relationship.Analog machine frequency is defeated
Enter amount slope and increase 0.15Hz, Ypid adjustment signal is calculated by electronic controller model, inputs guide vane actuating mechanism model, meter
The variable quantity of guide vane opening Y is calculated, then inputs hydraulic turbine prime mover model, analog simulation goes out the variation of unit active-power P
Journey finally obtains the movement electricity of the primary frequency modulation theory based on simulation model according to the active power integral calculation of simulation data
Value is compared with the theoretical movement electricity obtained by original method, and calculated result is as Figure 9-Figure 11.Statistical comparison result
As shown in table 1, wherein Fig. 9 is that device electricity and actual act integral electricity are acted using method computational theory in the prior art
The calculating schematic diagram of amount, Figure 10 are that a kind of system-computed theory provided by the invention is used to act device electricity and actual act product
Divide the calculating schematic diagram of electricity, Figure 11 is to act device electricity and reality using another system-computed theory provided by the invention
Act the calculating schematic diagram of device electricity.
Fig. 9 is the theory and actual act electric quantity integration schematic diagram that the theoretical movement electricity calculation method now used obtains,
Wherein, Fig. 9 (a) is that mains frequency changes over time curve, and mains frequency changes since initial value (50Hz), primary when crossing
When Regulation dead-band fd, unit primary frequency modulation starts to act, and active-power P starts slowly to decline.Fig. 9 (b) is according to frequency departure
According to formulaObtained theoretical device electricity calculates the curve that diligent rate changes with frequency departure, after integral
Theoretical movement device electricity value can be obtained.Fig. 9 (c) is the unit active power primary frequency modulation response process of actual measurement, integrogram
Actual act device electricity value can be obtained in middle curve.Assuming that primary frequency modulation actuation time is Δ t, then t seconds obtained reasons of Δ are integrated
By with actual integration charge value as shown in shade in figure.Theoretical product that dash area (is no more than 60s) during being 1. primary frequency modulation
Divide electricity, 2. dash area is actual integration electricity.
Shown in Figure 10, to be based on hydroelectric machine under the ideal hydraulic turbine model of the present invention using the rigid water attack of only consideration
The theoretical movement electricity and actual act electric quantity integration schematic diagram that group regulating system simulation model calculates, Figure 10 (a) are power grid frequency
Rate changes over time curve, and mains frequency changes since initial value (50Hz), when crossing primary frequency modulation dead zone fd, unit one
Secondary frequency modulation starts to act, and primary frequency modulation duration is Δ t, and theoretical and actual act integral electricity can be obtained for Δ t seconds in integral
Magnitude.Theoretical device electricity size at this time is integrated by emulating the active-power P t curve obtained, as shown in Figure 10 (b),
3. dash area in figure is the hydroelectric units primary frequency modulation theory movement integral electricity of the invention based on ideal hydraulic turbine model
It measures, in Figure 10 (c) 4. dash area is actual integration electricity.
Shown in Figure 11, system is adjusted based on Hydropower Unit using under modified hydraulic turbine prime mover model to be of the present invention
The theoretical movement electricity and actual act electric quantity integration schematic diagram that simulation model of uniting calculates, Figure 11 (a) be mains frequency at any time
Change curve, mains frequency change since initial value (50Hz), and when crossing primary frequency modulation dead zone fd, unit primary frequency modulation is opened
Initiating is made, and primary frequency modulation duration is similarly Δ t, and integral can obtain theoretical and actual act device electricity value for Δ t seconds.This
When theoretical device electricity size integrated by emulating the active-power P t curve obtained, the yin as shown in Figure 11 (b), in figure
5. shadow part is the hydroelectric units primary frequency modulation theory movement device electricity value of the invention based on modified hydraulic turbine model, figure
In 11 (c) 6. dash area is actual integration electricity.
Table 1 acts device electricity statistical comparison result
It should be noted that it be hydraulic turbine prime mover model is the reason for only considering rigid water attack that model one of the present invention is corresponding
Think hydraulic turbine prime mover model, corresponding model two of the present invention is to not only allow for rigid water attack, also contemplate theoretical wattful power
Ideal hydraulic turbine prime mover model of corresponding relationship between rate and guide vane opening.
It can be seen that by statistical comparison result, the theoretical movement device electricity and actual act device electricity value that original method obtains
Deviation it is bigger, and utilize the theoretical movement device electricity that is calculated based on prime mover model compared to original method closer to real
Border device electricity value, meanwhile, it can be seen that the examination using improved model simulation calculation by three above radiometer formula
As a result than only considering that the ideal hydraulic turbine model of rigid water attack is more acurrate.
Using the method for the present invention carry out the examination of primary frequency modulation contributing electricity, can easily and effectively raisings performance assessment criteria calculating
Accuracy facilitates hydroelectric units primary frequency modulation ancillary service everything goes well with your work to carry out, provides reason to establish reasonable appraisal mechanism
By support.
In summary:
The present invention provides two kinds of prime mover models and uses for calculating theoretical device electricity, a kind of reason to consider rigid water attack
Think hydraulic turbine model；A kind of modified hydraulic turbine model to consider guide vane opening and active power corresponding relationship under certain head,
The model improves the ideal hydraulic turbine model for only considering rigid water attack, and the hydraulic turbine is added in its loop control logic to be had
The corresponding relationship link of function power and guide vane opening makes the power output of model and actual conditions more coincide.
Primary frequency modulation contributing electricity wire examination method of the present invention improves the accuracy of examination, theory movement integral
Electricity is calculated using the active power curves that prime mover model emulation obtains, and theory more connects with actual act device electricity
Closely, the result of appraisal of hydroelectric units primary frequency modulation are more accurate, can reduce primary frequency modulation caused by original method calculates inaccurately and examine
The low situation of compliance rate reduces the workload of economy of power plant loss and frequent progress statement.
Hydroelectric units primary frequency modulation contributing electricity wire examination method of the present invention based on simulation model is by building
Module carries out analog simulation and calculating, clear in structure, simple and convenient, gears to actual circumstances, and can mention for hydroelectric units primary frequency modulation examination
For more accurate data.
The present invention provides a kind of checking systems of hydroelectric units primary frequency modulation contributing electricity, imitative including the use of Hydropower Unit
True mode obtains theoretical active power；Then it is active according to theoretical active power, theory to calculate module for theory movement device electricity
Power corresponding time and theoretical movement device electricity relational expression obtain the theoretical movement integral electricity of hydroelectric units primary frequency modulation
Amount, theory movement device electricity calculate module and obtain water power according to actual power, the actual power corresponding time of Hydropower Unit
The actual act device electricity of unit primary frequency modulation, evaluation module, for calculating actual act device electricity to theory movement product
Divide the ratio of electricity, and judge whether ratio is greater than preset threshold, if it is, the secondary primary frequency modulation of Hydropower Unit is by examining
Otherwise core does not pass through examination then.
As it can be seen that the simulation model that the present invention is first depending on Hydropower Unit obtains the theoretical active power of Hydropower Unit, and adopt
Theoretical movement device electricity is obtained with the relationship of theoretical active power and time, then according to the theory obtained in the way of this kind
Movement device electricity is examined with primary frequency modulation of the actual act device electricity to Hydropower Unit, due to being obtained using which
Theoretical movement device electricity and actual act device electricity it is closer, also more accurately, therefore, the result of appraisal are also more quasi-
Really, error rate is low, avoids the status for examining compliance rate low using original calculation method bring primary frequency modulation.
Figure 12 is please referred to, Figure 12 is a kind of wire examination method of hydroelectric units primary frequency modulation contributing electricity provided by the invention
The flow chart of process, this method comprises:
Step S101: Hydropower Unit simulation model is according to frequency departure and active power deviation or guide vane opening deviation
Obtain the theoretical active power of Hydropower Unit；Wherein, the frequency that frequency departure subtracts Hydropower Unit for frequency Setting signal obtains
The numerical value that is obtained after dead zone is handled of difference, active power deviation is the reason that given theoretical active power subtracts Hydropower Unit
The difference obtained by active power；Guide vane opening deviation is that given guide vane opening subtracts the difference that the guide vane opening of Hydropower Unit obtains
Value；
Preferably, Hydropower Unit simulation model includes electronic controller model, guide vane actuating mechanism model and water
Turbine prime mover model obtains the theory of Hydropower Unit according to frequency departure and active power deviation or guide vane opening deviation
The process of active power specifically:
Electronic controller model obtains hydroelectric machine according to frequency departure and active power deviation or guide vane opening deviation
The target guide vane opening signal of group；
Guide vane actuating mechanism model obtains practical guide vane opening signal according to target guide vane opening signal；
Hydraulic turbine prime mover model obtains theoretical active power according to practical guide vane opening signal.
Preferably, Hydropower Unit is obtained according to frequency departure and active power deviation or guide vane opening deviation
The process of target guide vane opening signal specifically:
The frequency for receiving frequency Setting signal and Hydropower Unit carries out the frequency of frequency Setting signal and Hydropower Unit
It makes the difference, and dead zone is carried out to obtained difference and handles to obtain frequency departure；
Carry out the first ratio processing and the first differential process respectively to frequency departure, it is corresponding to obtain the first numerical value and the second number
Value；
By active power deviation and power difference coefficient carry out multiplication processing or by guide vane opening deviation and aperture tune it is poor
Coefficient carries out multiplication processing, obtains third value；
Third value is added processing with frequency departure, first integral processing is carried out to the result that addition is handled,
Obtain the 4th numerical value；
Addition processing is done to the first numerical value, second value and the 4th numerical value, obtains the 5th numerical value；
First amplitude limiting processing is carried out to the 5th numerical value, obtains target guide vane opening signal；
The corresponding transmission function of first ratio processing is Kp, the corresponding transmission function of the first differential process isThe
The corresponding transmission function of one Integral Processing isWherein, KpFor the first proportional gain, KIFor first integral gain, KDIt is first
The differential gain, T1VFor the first derivative time constant.
Preferably, the process of practical guide vane opening signal is obtained according to target guide vane opening signal specifically:
Target guide vane opening signal and currently practical guide vane opening signal are made the difference, and to obtained difference point
The second ratio processing, second integral processing and the second differential process are not carried out, then three obtained numerical value is subjected to the second limit
Width processing, and the result obtained to the second amplitude limiting processing integrates, then carries out third amplitude limiting processing to the result of integral, obtains
Practical guide vane opening signal；
Wherein, it is K that the second ratio, which handles corresponding transmission function,p', the corresponding transmission function of second integral processing is
The corresponding transmission function of second differential process is KD' S, wherein Kp' it is the second proportional gain, KI' it is second integral gain, KD'
For second differential gain.
Step S102: it is corresponding according to theoretical active power, theoretical active power that theory movement device electricity calculates module
Time and theoretical movement device electricity relational expression obtain the theoretical movement device electricity of hydroelectric units primary frequency modulation, wherein reason
By movement device electricity relational expression are as follows:
Wherein, QtDevice electricity is acted for theory；t0At the time of for frequency departure overfrequency dead zone；Δ t is that integral starts
Primary frequency modulation process duration afterwards, wherein Δ t is no longer than 60s, more than being calculated with 60s for 60s；Pt has for theory
Function power；P0For t0Corresponding theory active power；
Step S103: it is corresponding according to actual power, the actual power of Hydropower Unit that actual act device electricity calculates module
Time obtain the actual act device electricity of hydroelectric units primary frequency modulation；
Step S104: evaluation module calculates actual act device electricity to the ratio of theoretical movement device electricity, and judges
Whether ratio is greater than preset threshold, if it is, the secondary primary frequency modulation of Hydropower Unit by examination, otherwise, does not then pass through and examines
Core.
A kind of introduction of the wire examination method of hydroelectric units primary frequency modulation contributing electricity provided by the invention is please referred to
System embodiment is stated, details are not described herein by the present invention.
The present invention provides a kind of wire examination methods of hydroelectric units primary frequency modulation contributing electricity, imitative including the use of Hydropower Unit
True mode obtains theoretical active power；Then it is active according to theoretical active power, theory to calculate module for theory movement device electricity
Power corresponding time and theoretical movement device electricity relational expression obtain the theoretical movement integral electricity of hydroelectric units primary frequency modulation
Amount, theory movement device electricity calculate module and obtain water power according to actual power, the actual power corresponding time of Hydropower Unit
The actual act device electricity of unit primary frequency modulation, evaluation module, for calculating actual act device electricity to theory movement product
Divide the ratio of electricity, and judge whether ratio is greater than preset threshold, if it is, the secondary primary frequency modulation of Hydropower Unit is by examining
Otherwise core does not pass through examination then.
As it can be seen that the simulation model that the present invention is first depending on Hydropower Unit obtains the theoretical active power of Hydropower Unit, and adopt
Theoretical movement device electricity is obtained with the relationship of theoretical active power and time, then according to the theory obtained in the way of this kind
Movement device electricity is examined with primary frequency modulation of the actual act device electricity to Hydropower Unit, due to being obtained using which
Theoretical movement device electricity and actual act device electricity it is closer, also more accurately, therefore, the result of appraisal are also more quasi-
Really, error rate is low, avoids the status for examining compliance rate low using original calculation method bring primary frequency modulation.
It should be noted that in the present specification, relational terms such as first and second and the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of checking system of hydroelectric units primary frequency modulation contributing electricity characterized by comprising
Hydropower Unit simulation model, it is described for being obtained according to frequency departure and active power deviation or guide vane opening deviation
The theoretical active power of Hydropower Unit；Wherein, the frequency departure is the frequency that frequency Setting signal subtracts the Hydropower Unit
The numerical value that obtained difference obtains after dead zone is handled, the active power deviation are described in given theoretical active power subtracts
The difference that the theoretical active power of Hydropower Unit obtains；The guide vane opening deviation is that given guide vane opening subtracts the hydroelectric machine
The difference that the guide vane opening of group obtains；
Theory movement device electricity calculates module, for corresponding according to the theoretical active power, the theoretical active power
Time and theoretical movement device electricity relational expression obtain the theoretical movement device electricity of hydroelectric units primary frequency modulation, wherein institute
State theoretical movement device electricity relational expression are as follows:
Wherein, QtFor the theoretical movement device electricity；t0At the time of for frequency departure overfrequency dead zone；Δ t is that integral starts
Primary frequency modulation process duration afterwards, wherein Δ t is no longer than 60s, more than being calculated with 60s for 60s；PtFor the reason
By active power；P0For t0Corresponding theory active power；
Actual act device electricity calculates module, corresponding for actual power, the actual power according to the Hydropower Unit
Time obtain the actual act device electricity of hydroelectric units primary frequency modulation；
Evaluation module for calculating the actual act device electricity to the ratio of the theoretical movement device electricity, and judges
Whether the ratio is greater than preset threshold, if it is, the secondary primary frequency modulation of the Hydropower Unit passes through examination, otherwise, then
Examination is not passed through；
The Hydropower Unit simulation model includes:
Electronic controller model, for obtaining the water according to frequency departure and active power deviation or guide vane opening deviation
The target guide vane opening signal of motor group；
Guide vane actuating mechanism model, for obtaining practical guide vane opening signal according to the target guide vane opening signal；
Hydraulic turbine prime mover model, for obtaining the theoretical active power according to the practical guide vane opening signal.
2. the checking system of hydroelectric units primary frequency modulation contributing electricity as described in claim 1, which is characterized in that the electronics
Adjuster model is specifically used for:
The frequency for receiving frequency Setting signal and Hydropower Unit, to the frequency of the frequency Setting signal and the Hydropower Unit
It is made the difference, and dead zone is carried out to obtained difference and handles to obtain the frequency departure；
Carry out the first ratio processing and the first differential process respectively to the frequency departure, it is corresponding to obtain the first numerical value and the second number
Value；
Active power deviation and power difference coefficient are subjected to multiplication processing or by guide vane opening deviation and aperture difference coefficient
Multiplication processing is carried out, third value is obtained；
The third value is added processing with the frequency departure, the result that addition is handled is carried out at first integral
Reason, obtains the 4th numerical value；
Addition processing is done to first numerical value, the second value and the 4th numerical value, obtains the 5th numerical value；
First amplitude limiting processing is carried out to the 5th numerical value, obtains the target guide vane opening signal；
It is K that first ratio, which handles corresponding transmission function,p, the corresponding transmission function of first differential process isThe first integral handles corresponding transmission functionWherein, KpFor the first proportional gain, KIFor first integral
Gain, KDFor first differential gain, T1VFor the first derivative time constant.
3. the checking system of hydroelectric units primary frequency modulation contributing electricity as described in claim 1, which is characterized in that the guide vane
Executing agency's model is specifically used for:
The target guide vane opening signal and currently practical guide vane opening signal are made the difference, and to obtained difference point
The second ratio processing, second integral processing and the second differential process are not carried out, then three obtained numerical value is subjected to the second limit
Width processing, and the result obtained to the second amplitude limiting processing integrates, then carries out third amplitude limiting processing to the result of integral, obtains
The practical guide vane opening signal；
Wherein, it is K that second ratio, which handles corresponding transmission function,p', the second integral handles corresponding transmission function and isThe corresponding transmission function of second differential process is KD' s, wherein the Kp' it is the second proportional gain, KI' it is second
Integral gain, KD' it is second differential gain.
4. the checking system of hydroelectric units primary frequency modulation contributing electricity as described in claim 1, which is characterized in that the water wheels
The corresponding transmission function relationship of machine prime mover model is G1(s)+G2(s), in which:
TwFor fluid inertia time constant；
G2(s) corresponding equation is Pt=aY3+bY2+ cY+d, a, b, c and d are constant；
PtFor the theoretical active power, Y is the practical guide vane opening signal.
5. the checking system of hydroelectric units primary frequency modulation contributing electricity as described in claim 1, which is characterized in that the water wheels
Machine prime mover model is the ideal hydraulic turbine model for only considering rigid water attack, the corresponding transmitting letter of hydraulic turbine prime mover model
Number relationship are as follows:
Wherein, TwFor fluid inertia time constant.
6. a kind of wire examination method of hydroelectric units primary frequency modulation contributing electricity characterized by comprising
Hydropower Unit simulation model, it is described for being obtained according to frequency departure and active power deviation or guide vane opening deviation
The theoretical active power of Hydropower Unit；Wherein, the frequency departure is the frequency that frequency Setting signal subtracts the Hydropower Unit
The numerical value that obtained difference obtains after dead zone is handled, the active power deviation are described in given theoretical active power subtracts
The difference that the theoretical active power of Hydropower Unit obtains；The guide vane opening deviation is that given guide vane opening subtracts the hydroelectric machine
The difference that the guide vane opening of group obtains；
Theory movement device electricity calculate module according to the theoretical active power, the theoretical active power corresponding time with
And theoretical movement device electricity relational expression obtains the theoretical movement device electricity of hydroelectric units primary frequency modulation, wherein the theory
Act device electricity relational expression are as follows:
Wherein, QtFor the theoretical movement device electricity；t0At the time of for frequency departure overfrequency dead zone；Δ t is that integral starts
Primary frequency modulation process duration afterwards, wherein Δ t is no longer than 60s, more than being calculated with 60s for 60s；PtFor the reason
By active power；P0For t0Corresponding theory active power；
Actual act device electricity calculates actual power of the module according to the Hydropower Unit, the actual power corresponding time
Obtain the actual act device electricity of hydroelectric units primary frequency modulation；
Evaluation module calculates the actual act device electricity to the ratio of the theoretical movement device electricity, and judges the ratio
Whether value is greater than preset threshold, if it is, otherwise the secondary primary frequency modulation of the Hydropower Unit, is not then passed through by examination
Examination；
The Hydropower Unit simulation model includes electronic controller model, guide vane actuating mechanism model and hydraulic turbine prime mover mould
Type, the theory for obtaining the Hydropower Unit according to frequency departure and active power deviation or guide vane opening deviation are active
The process of power specifically:
The electronic controller model obtains the water according to frequency departure and active power deviation or guide vane opening deviation
The target guide vane opening signal of motor group；
The guide vane actuating mechanism model obtains practical guide vane opening signal according to the target guide vane opening signal；
Hydraulic turbine prime mover model obtains the theoretical active power according to the practical guide vane opening signal.
7. the wire examination method of hydroelectric units primary frequency modulation contributing electricity as claimed in claim 6, which is characterized in that the foundation
Frequency departure and active power deviation or guide vane opening deviation obtain the target guide vane opening signal of the Hydropower Unit
Process specifically:
The frequency for receiving frequency Setting signal and Hydropower Unit, to the frequency of the frequency Setting signal and the Hydropower Unit
It is made the difference, and dead zone is carried out to obtained difference and handles to obtain the frequency departure；
Carry out the first ratio processing and the first differential process respectively to the frequency departure, it is corresponding to obtain the first numerical value and the second number
Value；
Active power deviation and power difference coefficient are subjected to multiplication processing or by guide vane opening deviation and aperture difference coefficient
Multiplication processing is carried out, third value is obtained；
The third value is added processing with the frequency departure, the result that addition is handled is carried out at first integral
Reason, obtains the 4th numerical value；
Addition processing is done to first numerical value, the second value and the 4th numerical value, obtains the 5th numerical value；
First amplitude limiting processing is carried out to the 5th numerical value, obtains the target guide vane opening signal；
It is K that first ratio, which handles corresponding transmission function,p, the corresponding transmission function of first differential process isThe first integral handles corresponding transmission functionWherein, KpFor the first proportional gain, KIFor first integral
Gain, KDFor first differential gain, T1VFor the first derivative time constant.
8. the wire examination method of hydroelectric units primary frequency modulation contributing electricity as claimed in claim 6, which is characterized in that the foundation
The target guide vane opening signal obtains the process of practical guide vane opening signal specifically:
The target guide vane opening signal and currently practical guide vane opening signal are made the difference, and to obtained difference point
The second ratio processing, second integral processing and the second differential process are not carried out, then three obtained numerical value is subjected to the second limit
Width processing, and the result obtained to the second amplitude limiting processing integrates, then carries out third amplitude limiting processing to the result of integral, obtains
The practical guide vane opening signal；
Wherein, it is K that second ratio, which handles corresponding transmission function,p', the second integral handles corresponding transmission function and isThe corresponding transmission function of second differential process is KD' s, wherein the Kp' it is the second proportional gain, KI' it is second
Integral gain, KD' it is second differential gain.
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| CN108053097A (en) * | 2017-11-23 | 2018-05-18 | 上海电力学院 | The frequency-domain index test and evaluation method of primary frequency modulation performance |
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| CN108695884A (en) * | 2018-04-11 | 2018-10-23 | 广东电网有限责任公司电力科学研究院 | A kind of hydroelectric units primary frequency modulation checking system |
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| CN110011331A (en) * | 2019-03-29 | 2019-07-12 | 西安理工大学 | A method of primary frequency regulation of power network is participated in using velocity fluctuation pump |
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| CN112412691A (en) * | 2020-10-27 | 2021-02-26 | 南京南瑞水利水电科技有限公司 | Primary frequency modulation method for speed regulator of variable-speed pumped storage unit |
| CN113013897B (en) * | 2021-03-09 | 2023-01-06 | 国网四川综合能源服务有限公司四川电力工程分公司 | Mechanical dead zone compensation method and device for guide vane of hydroelectric generating set |
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