CN106326529A - System and method for assessing contribution electric quantity of primary frequency modulation of hydroelectric generating set - Google Patents

System and method for assessing contribution electric quantity of primary frequency modulation of hydroelectric generating set Download PDF

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CN106326529A
CN106326529A CN201610648154.0A CN201610648154A CN106326529A CN 106326529 A CN106326529 A CN 106326529A CN 201610648154 A CN201610648154 A CN 201610648154A CN 106326529 A CN106326529 A CN 106326529A
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guide vane
theoretical
active power
vane opening
device electricity
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CN106326529B (en
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徐广文
李玺
曹斌
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Electric Power Research Institute of Guangdong Power Grid Co Ltd
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Electric Power Research Institute of Guangdong Power Grid Co Ltd
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    • G06—COMPUTING; CALCULATING OR COUNTING
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    • G06F30/20—Design optimisation, verification or simulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract

The invention discloses a system and a method for assessing contribution electric quantity of primary frequency modulation of a hydroelectric generating set. The method comprises the following steps of utilizing a simulation model of the hydroelectric generating set to obtain theoretical active power; then, enabling a theoretical action integral electric quantity calculation module to obtain the theoretical action integral electric quantity of the primary frequency modulation of the hydroelectric generating set according to the theoretical active power, the time corresponding to the theoretical active power, and the theoretical action integral electric quantity relation, and obtain the actual action integral electric quantity of the primary frequency modulation of the hydroelectric generating set according to the actual power of the hydroelectric generating set, and the time corresponding to the actual power; enabling an assessing module to calculate the ratio of actual action integral electric quantity and theoretical action integral electric quantity, and judging whether the ratio is greater than the threshold value or not, wherein when the ratio is greater than the threshold value, the primary frequency modulation of the hydroelectric generating set passes through assessing; when the ratio is not greater than the threshold value, the primary frequency modulation does not pass through assessing. The system has the advantages that the theoretical action integral electric quantity obtained by the type is more approximate to the actual action integral electric quantity, and the electric quantity is more accurate; the assessing result is more accurate, and the false rate is low.

Description

The checking system of a kind of hydroelectric units primary frequency modulation contributing electricity and method
Technical field
The present invention relates to hydroelectric units primary frequency modulation technical field, particularly relate to a kind of hydroelectric units primary frequency modulation contribution The checking system of electricity and method.
Background technology
At present, in the factor affecting the quality of power supply, mains frequency accounts for major part.Hydroelectric units primary frequency modulation refers to work as When mains frequency occurs fluctuation, governing system is automatically adjusted guide vane opening according to the difference on the frequency of mains frequency Yu rated frequency, changes Become unit output and adapt to load variations.Primary frequency modulation services as one of basic assistant service, is that grid requirements power plant is necessary The service provided.If power plant be not provided that because of self reason primary frequency modulation service or offer primary frequency modulation service the most up to standard will Examined.Result according to examination correspondingly reduces power generating capacity, finally affects its economic benefit.
To the examination of institute's contributing electricity after primary frequency modulation action in prior art, it is that traffic department exceeds tune at mains frequency Frequently the number such as actual power of the Hydropower Unit sent in movement time instantly, electrical network real-time frequency and power plant is recorded during dead zone range According to, theoretical action device electricity and the actual act integration electricity of unit is calculated respectively according to these data separate examination formula Further according to actual act device electricity and theoretical action device electricity, amount, then judges that quality of movement is the most qualified, and determines Whether power plant is examined.
Actual act device electricity calculates as shown in formula (1):
Q r = ∫ t 0 t 0 + Δ t ( P a - P 0 ) d t / 3600 - - - ( 1 )
In formula: Qr is actual act device electricity (unit: kW h)；t0Exceed for integration initial time, i.e. frequency departure The moment (unit: s) of frequency dead band；Δ t is that (no longer than 60s surpasses the primary frequency modulation process duration after integration starts Cross calculating with 60s of 60s, unit: s)；PaFor actual exert oneself (unit: the kW) of unit；P0For the unit that integration initial time is corresponding Exert oneself (unit: kW).
Theoretical action device electricity calculates as shown in formula (2):
Q t = P r × ∫ t 0 t 0 + Δ t Δ f ( 3600 × f r × 4 % ) d t - - - ( 2 )
In formula: QtFor theoretical action device electricity (unit: kW h)；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 computing formula of frequency deviation f is:
&Delta; f = 0 - e f &le; f r - f g &le; e f f r - f g - e f e f < f r - f g f r - f g + e f f r - f g < - e f - - - ( 3 )
In formula: fg is the frequency (unit: Hz) of Hydropower Unit；Fr is electrical network rated frequency (unit: Hz)；efFor once adjusting Frequently dead band (unit: Hz).
From formula (1), (2), actual act device electricity is to calculate according to active power time curve, And theory action device electricity calculates according to frequency time relation curve.Theoretical device electricity changes in real time with frequency difference Becoming, and Hydropower Unit regulation system hysteresis quality is relatively strong, power response is relatively slow, and due to hydrodynamic inertial, in regulation Initial stage there will be counter adjusts effect, and in all causing same time period, actual act device electricity is less than normal compared with theoretical value.Extreme case Under, when frequency disturbance is a step amount, frequency time relation curve is a broken line, and active power time relationship is bent Line is a curve, as it is shown in figure 1, t0Moment frequency disturbance-0.15Hz, unit frequency difference exceeds Man made Dead Band, through of short duration Time delay primary frequency modulation starts action, owing to the reason of hydrodynamic inertial occurred counter adjusting effect, in Fig. 1 (c) at the stator motion initial stage t0-t1Period, now unit is that opposite direction goes out force-responsive, and actual integration electricity is negative value.t1After moment, unit output transfers to Positive direction, actual integration electricity gradually become on the occasion of.In Fig. 1 (b), dash area is theoretical action device electricity, cloudy in Fig. 1 (c) Shadow part is actual act device electricity, it can be seen that theoretical bigger with actual value error during calculating.This explanation frequency It is inaccurate that rate time curve calculates theoretical action device electricity.If according to this kind of calculated reason of mode If the primary frequency modulation of electrical network is examined by opinion action device electricity, the primary frequency modulation of actually Hydropower Unit easily occurs Correct operation, but in course of action, the device electricity of contribution is registered as being unsatisfactory for requiring this situation so that and examination is by mistake 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 area Technical staff is presently required and solves the technical problem that.
Summary of the invention
It is an object of the invention to provide the checking system of a kind of hydroelectric units primary frequency modulation contributing electricity, according to Hydropower Unit Phantom obtain the theoretical active power of Hydropower Unit, and use theoretical active power and the relation of time to obtain theory Action device electricity, the more theoretical action device electricity and actual act device electricity according to utilizing this kind of mode to obtain is to water power The primary frequency modulation of unit is examined, owing to the theoretical action device electricity using which to obtain is more accurate, therefore, and examination Result is the most accurate, and error rate is low；It is a further object of the present invention to provide a kind of hydroelectric units primary frequency modulation contributing electricity Wire examination method.
For solving above-mentioned technical problem, the invention provides the examination system of a kind of hydroelectric units primary frequency modulation contributing electricity System, including:
Hydropower Unit phantom, for obtaining according to frequency departure and active power deviation or guide vane opening deviation The theoretical active power of described Hydropower Unit；Wherein, described frequency departure is that frequency Setting signal deducts described Hydropower Unit The numerical value that the difference that frequency obtains obtains after dead band processes, described active power deviation deducts for given theoretical active power The difference that the theoretical active power of described Hydropower Unit obtains；Described guide vane opening deviation deducts described water for given guide vane opening The difference that the guide vane opening of group of motors obtains；
Theoretical action device electricity calculates module, for according to described theoretical active power, described theoretical active power pair The time answered and theoretical action device electricity relational expression obtain the theoretical action device electricity of hydroelectric units primary frequency modulation, its In, described theoretical action device electricity relational expression is:
Q t = &Integral; t 0 t 0 + &Delta; t ( P t - P 0 ) d t / 3600 ;
Wherein, QtFor described theoretical action device electricity；t0Moment for frequency departure overfrequency dead band；Δ t is integration Primary frequency modulation process duration after beginning, wherein, Δ t is no longer than 60s, calculating with 60s more than 60s；Pt is institute State theoretical active power；P0For t0Corresponding theoretical active power；
Actual act device electricity calculates module, for according to the actual power of described Hydropower Unit, described actual power The corresponding time obtains the actual act device electricity of hydroelectric units primary frequency modulation；
Evaluation module, for calculating the described actual act device electricity ratio to described theoretical action device electricity, and Judge whether described ratio is more than predetermined threshold value, if it is, this primary frequency modulation of described Hydropower Unit is by examination, no Then, the most not by examination.
Preferably, described Hydropower Unit phantom 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 actual guide vane opening signal according to described target guide vane opening signal；
Hydraulic turbine prime mover model, for obtaining described theoretical active power according to described actual guide vane opening signal.
Preferably, described electronic controller model specifically for:
Receive frequency Setting signal and the frequency of Hydropower Unit, to described frequency Setting signal and described Hydropower Unit Frequency carries out doing difference process, and the difference obtained carries out dead band processes and obtain described frequency departure；
Described frequency departure carrying out the first ratio process and the first differential respectively process, correspondence obtains the first numerical value and the Two numerical value；
Carrying out active power deviation with power difference coefficient being multiplied, it is poor to process or guide vane opening deviation and aperture are adjusted Coefficient carries out the process that is multiplied, and obtains third value；
With described frequency departure, described third value is added process, and the result obtaining addition process carries out first and amasss Divisional processing, obtains the 4th numerical value；
Described first numerical value, described second value and described 4th numerical value do addition process, obtain the 5th numerical value；
Described 5th numerical value is carried out the first amplitude limiting processing, obtains described target guide vane opening signal；
It is K that described first ratio processes corresponding transmission functionp, described first differential processes corresponding transmission function and isDescribed first integral processes corresponding transmission functionWherein, KpIt is the first proportional gain, KIFor first integral Gain, KDIt is first differential gain, T1VIt it is the first derivative time constant.
Preferably, described guide vane actuating mechanism model specifically for:
Carry out described target guide vane opening signal and currently practical guide vane opening signal doing difference process, and to the difference obtained Value carries out the second ratio process respectively, second integral processes and the second differential processes, then three numerical value obtained carry out the Two amplitude limiting processing, and the result obtaining the second amplitude limiting processing is integrated, then the result of integration is carried out the 3rd amplitude limiting processing, Obtain described actual guide vane opening signal；
Wherein, described second ratio processes corresponding transmission function is Kp', described second integral processes corresponding transmission letter Number isIt is K that described second differential processes corresponding transmission functionD' S, wherein, described Kp' it is the second proportional gain, KI' it is Second integral gain, KD' it is second differential gain.
Preferably, the transmission functional relationship that described hydraulic turbine prime mover model is corresponding is G1(s)+G2(s), wherein:
TwFor fluid inertia time constant；
G2S the equation of () correspondence is P=aY3+bY2+ cY+d, a, b, c and d are constant.
Preferably, described hydraulic turbine prime mover model is the preferable hydraulic turbine model only considering rigidity water attack, described water wheels The transmission functional relationship that machine prime mover model is corresponding is:
Wherein, TwFor fluid inertia time constant.
For solving above-mentioned technical problem, present invention also offers the examination side of a kind of hydroelectric units primary frequency modulation contributing electricity Method, including:
Hydropower Unit phantom obtains described according to frequency departure and active power deviation or guide vane opening deviation The theoretical active power of Hydropower Unit；Wherein, described frequency departure is the frequency that frequency Setting signal deducts described Hydropower Unit The numerical value that the difference obtained obtains after dead band processes, described active power deviation deducts described for given theoretical active power The difference that the theoretical active power of Hydropower Unit obtains；Described guide vane opening deviation deducts described hydroelectric machine for given guide vane opening The difference that the guide vane opening of group obtains；
Theoretical action device electricity calculate module according to described theoretical active power, described theoretical active power corresponding time Between and theoretical action device electricity relational expression obtain the theoretical action device electricity of hydroelectric units primary frequency modulation, wherein, described Theoretical action device electricity relational expression is:
Q t = &Integral; t 0 t 0 + &Delta; t ( P t - P 0 ) d t / 3600 ;
Wherein, QtFor described theoretical action device electricity；t0Moment for frequency departure overfrequency dead band；Δ t is integration Primary frequency modulation process duration after beginning, wherein, Δ t is no longer than 60s, calculating with 60s more than 60s；Pt is institute State theoretical active power；P0For t0Corresponding theoretical active power；
It is corresponding according to actual power, the described actual power of described 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 described actual act device electricity ratio to described theoretical action device electricity, and judges institute State whether ratio is more than predetermined threshold value, if it is, this primary frequency modulation of described Hydropower Unit is by examination, otherwise, the most not By examination.
Preferably, described Hydropower Unit phantom includes electronic controller model, guide vane actuating mechanism model and water Turbine prime mover model, described foundation frequency departure and active power deviation or guide vane opening deviation obtain described hydroelectric machine Group theoretical active power process particularly as follows:
Described 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；
Described guide vane actuating mechanism model obtains actual guide vane opening signal according to described target guide vane opening signal；
Described hydraulic turbine prime mover model obtains described theoretical active power according to described actual guide vane opening signal.
Preferably, described foundation frequency departure and active power deviation or guide vane opening deviation obtain described hydroelectric machine Group target guide vane opening signal process particularly as follows:
Receive frequency Setting signal and the frequency of Hydropower Unit, to described frequency Setting signal and described Hydropower Unit Frequency carries out doing difference process, and the difference obtained carries out dead band processes and obtain described frequency departure；
Described frequency departure carrying out the first ratio process and the first differential respectively process, correspondence obtains the first numerical value and the Two numerical value；
Carrying out active power deviation with power difference coefficient being multiplied, it is poor to process or guide vane opening deviation and aperture are adjusted Coefficient carries out the process that is multiplied, and obtains third value；
With described frequency departure, described third value is added process, and the result obtaining addition process carries out first and amasss Divisional processing, obtains the 4th numerical value；
Described first numerical value, described second value and described 4th numerical value do addition process, obtain the 5th numerical value；
Described 5th numerical value is carried out the first amplitude limiting processing, obtains described target guide vane opening signal；
It is K that described first ratio processes corresponding transmission functionp, described first differential processes corresponding transmission function and isDescribed first integral processes corresponding transmission functionWherein, KpIt is the first proportional gain, KIFor first integral Gain, KDIt is first differential gain, T1VIt it is the first derivative time constant.
Preferably, described according to described target guide vane opening signal obtain actual guide vane opening signal process particularly as follows:
Carry out described target guide vane opening signal and currently practical guide vane opening signal doing difference process, and to the difference obtained Value carries out the second ratio process respectively, second integral processes and the second differential processes, then three numerical value obtained carry out the Two amplitude limiting processing, and the result obtaining the second amplitude limiting processing is integrated, then the result of integration is carried out the 3rd amplitude limiting processing, Obtain described actual guide vane opening signal；
Wherein, described second ratio processes corresponding transmission function is Kp', described second integral processes corresponding transmission letter Number isIt is K that described second differential processes corresponding transmission functionD' S, wherein, described Kp' it is the second proportional gain, KI' it is Second integral gain, KD' it is second differential gain.
The invention provides a kind of checking system and the method for hydroelectric units primary frequency modulation contributing electricity, including utilizing water power Unit phantom obtains theoretical active power；Then theoretical action device electricity calculates module according to theoretical active power, reason The time corresponding by active power and theoretical action device electricity relational expression obtain the theoretical action of hydroelectric units primary frequency modulation Device electricity, theoretical action device electricity calculates module and obtains according to the time that the actual power of Hydropower Unit, actual power are corresponding To the actual act device electricity of hydroelectric units primary frequency modulation, evaluation module, it is used for calculating actual act device electricity to theory The ratio of action device electricity, and judge whether ratio is more than predetermined threshold value, if it is, this primary frequency modulation of Hydropower Unit By examination, otherwise, the most not by examination.
Visible, the present invention is first depending on the phantom of Hydropower Unit and obtains the theoretical active power of Hydropower Unit, and adopts Theoretical action device electricity is obtained by theoretical active power and the relation of time, then according to the theory utilizing this kind of mode to obtain The primary frequency modulation of Hydropower Unit is examined by action device electricity with actual act device electricity, owing to using which to obtain Theoretical action device electricity and actual act device electricity closer to, the most accurate, therefore, the result of appraisal are the most accurate Really, error rate is low, it is to avoid the primary frequency modulation using original computational methods to bring examines the present situation that compliance rate is low.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to institute in prior art and embodiment The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention Example, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtains according to these accompanying drawings Obtain other accompanying drawing.
Fig. 1 is the comparison diagram of theoretical action device electricity and actual act device electricity under step disturbance in prior art；
Fig. 2 is the structural representation of the checking system that the invention provides a kind of hydroelectric units primary frequency modulation contributing electricity；
The block diagram of a kind of electronic controller model that Fig. 3 provides for the present invention；
The block diagram of a kind of guide vane actuating mechanism model that Fig. 4 provides for the present invention；
The block diagram of a kind of hydraulic turbine prime mover model that Fig. 5 provides for the present invention；
The block diagram of a kind of Francis turbine model that Fig. 6 provides for the present invention；
The block diagram of a kind of hydraulic turbine prime mover model that Fig. 7 provides for the present invention；
The structured flowchart of the checking system of a kind of hydroelectric units primary frequency modulation contributing electricity that Fig. 8 provides for the present invention；
Fig. 9 is the calculating using method of the prior art to calculate theoretical action device electricity and actual act device electricity Schematic diagram；
A kind of system-computed theory action device electricity that Figure 10 provides for using the present invention and actual act device electricity Calculating schematic diagram；
The another kind of system-computed theory action device electricity that Figure 11 provides for using the present invention and actual act integration electricity The calculating schematic diagram of amount；
The flow process of the process of the wire examination method of a kind of hydroelectric units primary frequency modulation contributing electricity that Figure 12 provides for the present invention Figure.
Detailed description of the invention
The core of the present invention is to provide the checking system of a kind of hydroelectric units primary frequency modulation contributing electricity, according to Hydropower Unit Phantom obtain the theoretical active power of Hydropower Unit, and use theoretical active power and the relation of time to obtain theory Action device electricity, the more theoretical action device electricity and actual act device electricity according to utilizing this kind of mode to obtain is to water power The primary frequency modulation of unit is examined, owing to the theoretical action device electricity using which to obtain is more accurate, therefore, and examination Result is the most accurate, and error rate is low；Another core of the present invention is to provide a kind of hydroelectric units primary frequency modulation contributing electricity Wire examination method.
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is The a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
Refer to the knot that Fig. 2, Fig. 2 are the checking system that the invention provides a kind of hydroelectric units primary frequency modulation contributing electricity Structure schematic diagram, this system includes:
Hydropower Unit phantom 1, for obtaining according to frequency departure and active power deviation or guide vane opening deviation Theoretical active power to Hydropower Unit；Wherein, frequency departure is that frequency Setting signal deducts the frequency of Hydropower Unit and obtains The numerical value that difference obtains after dead band processes, active power deviation is the theory that given theoretical active power deducts Hydropower Unit The difference that active power obtains；Guide vane opening deviation is that given guide vane opening deducts the difference that the guide vane opening of Hydropower Unit obtains Value；
As preferably, Hydropower Unit phantom 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 group of motors；
Guide vane actuating mechanism model, for obtaining actual guide vane opening signal according to target guide vane opening signal；
Hydraulic turbine prime mover model, for obtaining theoretical active power according to actual guide vane opening signal.
Specifically, refer to the block diagram of a kind of electronic controller model that Fig. 3, Fig. 3 provide for the present invention.
As preferably, electronic controller model specifically for:
Receive frequency Setting signal and the frequency of Hydropower Unit, the frequency of frequency Setting signal with Hydropower Unit is carried out Do difference process, and the difference obtained is carried out dead band process obtain frequency departure；
Understand in conjunction with Fig. 3, fdFor speed dead bend.And the f in figurecFor frequency Setting signal, when Hydropower Unit is entered by this model During row simulation, fcEqual to electrical network rated frequency 50Hz；fgFrequency for Hydropower Unit.
Frequency departure carrying out the first ratio process respectively and the first differential processes, correspondence obtains the first numerical value and the second number Value；
Carrying out active power deviation with power difference coefficient being multiplied, it is poor to process or guide vane opening deviation and aperture are adjusted Coefficient carries out the process that is multiplied, and obtains third value；
Pg、PcIt is respectively the theoretical active power of Hydropower Unit and given theoretical active power；Yg、YcIt is respectively water power The guide vane opening of unit and given guide vane opening.Wherein, when selecting active power deviation to participate in regulation, bp the most now is Power difference coefficient, when selecting guide vane opening deviation remnants to regulate, bp the most now is aperture difference coefficient, and which have selected Participating in regulation, 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 with frequency departure process, addition is processed the result obtained and carries out first integral process, Obtain the 4th numerical value；
First numerical value, second value and the 4th numerical value do addition process, obtain the 5th numerical value；
5th numerical value is carried out the first amplitude limiting processing, obtains target guide vane opening signal；
YPIDmax, YPIDmin respectively electronic controller model 1 carries out the output upper limit of the first amplitude limiting processing, lower limit, Y in figurePIDIt is target guide vane opening signal.
It is K that first ratio processes corresponding transmission functionp, the first differential processes corresponding transmission function and isThe Transmission function corresponding to one Integral Processing isWherein, KpIt is the first proportional gain, KIFor first integral gain, KDIt is first The differential gain, T1VIt it is the first derivative time constant.
Specifically, refer to the block diagram of a kind of guide vane actuating mechanism model that Fig. 4, Fig. 4 provide for the present invention.
As preferably, guide vane actuating mechanism model specifically for:
Carry out target guide vane opening signal and currently practical guide vane opening signal doing difference process, and the difference obtained is divided Do not carry out the second ratio process, second integral processes and the second differential processes, then three numerical value obtained are carried out the second limit Width processes, and the result obtaining the second amplitude limiting processing is integrated, then the result of integration is carried out the 3rd amplitude limiting processing, obtains Actual guide vane opening signal；
Wherein, the second ratio processes corresponding transmission function is Kp', second integral processes corresponding transmission function and is It is K that second differential processes corresponding transmission functionD' S, wherein, Kp' it is the second proportional gain, KI' for second integral gain, KD' It it is second differential gain.
It is understood that guide vane actuating mechanism model 2 alternatively referred to as electrohydraulic servo system modeling here, in this model PID arithmetic be Hydropower Unit regulate system inner loop PID controlling unit.
In figure, Y is actual guide vane opening signal (namely servomotor stroke signal), vmaxFor opening speed amplitude limit；vmin1、 vmin2For closing velocity amplitude limit (two sections of closedowns)；Ty is the response time constant of stator main servomotor；Ymax, Ymin stator master The range of servomotor, the minimum stroke of stator main servomotor；The time delay of Ydelay guide vane actuating mechanism output (second).
As preferably, the transmission functional relationship that hydraulic turbine prime mover model is corresponding is G1(s)+G2(s), wherein:
TwFor fluid inertia time constant；
G2S the equation of () correspondence is P=aY3+bY2+ cY+d, a, b, c and d are constant.
Specifically, refer to Fig. 5 and Fig. 6, wherein, the frame of a kind of hydraulic turbine prime mover model that Fig. 5 provides for the present invention Figure, the block diagram of a kind of Francis turbine model that Fig. 6 provides for the present invention.
Because the present invention wants to be simulated the Hydropower Unit in reality by the phantom of Hydropower Unit, and then To the theoretical active power of Hydropower Unit output, therefore, selection here not only allows for rigidity water attack, also contemplates theoretical gaining merit Preferable hydraulic turbine prime mover model of the corresponding relation 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 the transmission function of q to h, eh and Ey (namely G2(S) hydraulic turbine torque (power)) it is respectively to head and the carry-over factor of guide vane servomotor stroke, eqh and eqy It is respectively hydraulic turbine discharge to head and the carry-over factor of guide vane servomotor stroke.
It addition, G commonly used in the prior art2S the equation of () correspondence is P=aY3+bY2+ cY+d namely theoretical active power With the fit correlation formula (parameter has marked change the most) of main servomotor stroke can be:
P=-0.7269Y3+0.8581Y 2+1.0536Y-0.1808
Can also be:
P=-7.5728Y3+11.641Y 2-3.2838Y+0.2382；
Can also be:
P=-3.2377Y3+3.9267Y2+0.2278Y-0.1530。
Certainly, G here2The concrete form of s equation that () is corresponding is determined according to practical situation, and the present invention is not spy at this Other restriction.
As preferably, hydraulic turbine prime mover model is the preferable hydraulic turbine model only considering rigidity water attack, and the hydraulic turbine is former The transmission functional relationship that Motivation Model is corresponding is:
Wherein, TwFor fluid inertia time constant.
Specifically, refer to the block diagram of a kind of hydraulic turbine prime mover model that Fig. 7, Fig. 7 provide for the present invention.
Because the present invention wants to be simulated the Hydropower Unit in reality by the phantom of Hydropower Unit, and then To the theoretical active power of Hydropower Unit output, therefore, preferable hydraulic turbine prime mover mould of only consideration rigidity water attack is selected here Type.
Which kind of hydraulic turbine prime mover model is the present invention select be not particularly limited for concrete, comes according to practical situation Fixed.
Theoretical action device electricity calculates module 2, for the time corresponding according to theoretical active power, theoretical active power And theory action device electricity relational expression obtains the theoretical action device electricity of hydroelectric units primary frequency modulation, wherein, theoretical dynamic Making device electricity relational expression is:
Q t = &Integral; t 0 t 0 + &Delta; t ( P t - P 0 ) d t / 3600 ;
Wherein, QtFor theoretical action device electricity；t0Moment for frequency departure overfrequency dead band；Δ t is that integration starts After primary frequency modulation process duration, wherein, Δ t is no longer than 60s, more than 60s with 60s calculate；Pt is that theory has Merit power；P0For t0Corresponding theoretical active power；
Specifically, water electronic controller model, guide vane actuating mechanism model constituted with preferable hydraulic turbine model Group of motors governing system phantom, model input for frequency Setting signal, simulation machine frequency letter, active power deviation or Guide vane opening deviation, is computed drawing frequency difference, carries out PID arithmetic through frequency dead band link, then exports through PID output violent change link PID regulates signal, the inner loop PID loop joint in input guide vane actuating mechanism, opens through inner loop PID output, stator, closes speed limit ring Joint, is integrated computing in conjunction with guide vane servomotor time constant, believes through the servomotor amplitude limit actual guide vane opening of link output guide blade Number, input hydraulic turbine model, finally calculate power of the assembling unit output.This model meets reality and energy accurately artificial water group of motors one The process of secondary frequency modulation, obtains the active power simulation curve close with measured result variation tendency.
Actual act device electricity calculates module 3, for according to the actual power of Hydropower Unit, actual power corresponding time Between obtain the actual act device electricity of hydroelectric units primary frequency modulation；
Here actual act device electricity uses computational methods of the prior art to be calculated.
Evaluation module 4, for calculating the actual act device electricity ratio to theoretical action device electricity, and judges ratio Whether more than predetermined threshold value, if it is, this primary frequency modulation of Hydropower Unit is by examination, otherwise, the most not by examination.
Specifically, predetermined threshold value here can be 50%, it is of course also possible to be other numerical value, the present invention does not does at this Particularly limit, determine according to practical situation.
Specifically, refer to the examination of a kind of hydroelectric units primary frequency modulation contributing electricity that Fig. 8, Fig. 8 provide for the present invention The structured flowchart of system.
The beneficial effect produced below in conjunction with the instantiation system to using the present invention to provide compares with prior art Relatively:
Select certain hydroelectric power plant 1 unit primary frequency modulation test measured data, can use former method according to frequency time relation Calculate theoretical action device electricity, actual act device electricity can be calculated according to active power time relationship.Analog machine frequency is defeated Enter amount slope and increase 0.15Hz, electronic controller model calculate Ypid and regulate signal, input guide vane actuating mechanism model, meter Calculating the variable quantity of guide vane opening Y, then input hydraulic turbine prime mover model, analog simulation goes out the change of unit active-power P Journey, the active power integral and calculating finally according to simulation data obtains primary frequency modulation theory action electricity based on phantom Value, compares with the theoretical action electricity obtained by original method, and result of calculation is as Figure 9-Figure 11.Statistical result As shown in table 1, wherein, Fig. 9 is for using method of the prior art to calculate theoretical action device electricity and actual act integration electricity The calculating schematic diagram of amount, a kind of system-computed theory action device electricity that Figure 10 provides for using the present invention amasss with actual act Dividing the calculating schematic diagram of electricity, Figure 11 is that the another kind of system-computed theory action device electricity using the present invention to provide is with actual The calculating schematic diagram of action device electricity.
Fig. 9 is the theory that draws of the theoretical action electricity computational methods of existing use and actual act electric quantity integration schematic diagram, Wherein, Fig. 9 (a) is that mains frequency changes over curve, and mains frequency starts change from initial value (50Hz), when crossing once During Regulation dead-band fd, unit primary frequency modulation starts action, and active-power P starts slowly to decline.Fig. 9 (b) is according to frequency departure According to formulaThe theoretical device electricity obtained calculates the curve that diligent rate changes with frequency departure, after integration I.e. available theoretical action device electricity value.Fig. 9 (c) is the unit active power primary frequency modulation response process of actual measurement, integrogram Middle curve can get actual act device electricity value.Assume that primary frequency modulation movement time is Δ t, then the reason that the integration Δ t second obtains Discuss with actual integration charge value as shown in shade in figure.1. dash area is that (less than 60s) is theoretical long-pending during primary frequency modulation Dividing electricity, 2. dash area is actual integration electricity.
Shown in Figure 10, only consider for use of the present invention under the preferable hydraulic turbine model of rigidity water attack based on hydroelectric machine The theoretical action electricity of group regulation system simulation model calculating and actual act electric quantity integration schematic diagram, Figure 10 (a) is electrical network frequency Rate changes over curve, and mains frequency starts change, when crossing primary frequency modulation dead band fd, unit one from initial value (50Hz) Secondary frequency modulation starts action, and primary frequency modulation duration is Δ t, and the integration Δ t second is available theoretical electric with actual act integration Value.The active-power P t curve that theoretical device electricity size now is drawn by emulation is integrated, as shown in Figure 10 (b), 3. dash area in figure is the hydroelectric units primary frequency modulation theory action integration electricity based on preferable hydraulic turbine model of the present invention Amount, in Figure 10 (c), 4. dash area is actual integration electricity.
Shown in Figure 11, under use modified model hydraulic turbine prime mover model of the present invention based on Hydropower Unit regulation being Theoretical action electricity and the actual act electric quantity integration schematic diagram that system phantom calculates, Figure 11 (a) be mains frequency in time Change curve, mains frequency starts change from initial value (50Hz), and when crossing primary frequency modulation dead band fd, unit primary frequency modulation is opened Initiating is made, and primary frequency modulation duration is similarly Δ t, and the integration Δ t second can obtain theoretical and actual act device electricity value.This Time the active-power P t curve that drawn by emulation of theoretical device electricity size be integrated, the moon as shown in Figure 11 (b), in figure 5. shadow part is the hydroelectric units primary frequency modulation theory action device electricity value based on modified model hydraulic turbine model of the present invention, figure In 11 (c), 6. dash area is actual integration electricity.
Table 1 action device electricity statistical result
It should be noted that model one correspondence of the present invention be hydraulic turbine prime mover model be the reason only considering rigidity water attack Thinking hydraulic turbine prime mover model, model two correspondence of the present invention is to not only allow for rigidity water attack, also contemplate theoretical wattful power Preferable hydraulic turbine prime mover model of the corresponding relation between rate and guide vane opening.
Be can be seen that by statistical result, the theoretical action device electricity that former method obtains and actual act device electricity value Deviation ratio relatively big, and utilize the theoretical action device electricity calculated based on prime mover model to compare former method closer to reality Border device electricity value, meanwhile, by three above ratio meter formula it can be seen that utilize the examination of improved model simulation calculation Result is than only considering that the preferable hydraulic turbine model of rigidity water attack is more accurate.
Use the inventive method carry out primary frequency modulation contributing electricity examination, can easily and effectively raisings performance assessment criteria calculating Accuracy, contributes to hydroelectric units primary frequency modulation assistant service everything goes well with your work carrying out, provide reason for setting up rational appraisal mechanism Opinion is supported.
In sum:
The present invention provides two kinds of prime mover models for the theoretical device electricity of calculating, a kind of reason for considering rigidity water attack Think hydraulic turbine model；It is a kind of for considering guide vane opening and the modified model hydraulic turbine model of active power corresponding relation under certain head, The preferable hydraulic turbine model only considering rigidity water attack is improved by this model, and adding the hydraulic turbine in its loop control logic has Merit power and the corresponding relation link of guide vane opening, make the power of model export more identical with practical situation.
Primary frequency modulation contributing electricity wire examination method of the present invention improves the accuracy of examination, its theoretical action integration The active power curves that electricity utilizes prime mover model emulation to obtain calculates, and theory more connects with actual act device electricity Closely, the result of appraisal of hydroelectric units primary frequency modulation are more accurate, it is possible to decrease former method calculates the primary frequency modulation examination that inaccuracy causes The situation that compliance rate is low, reduces economy of power plant loss and frequently carries out the workload would stated.
Hydroelectric units primary frequency modulation contributing electricity wire examination method based on phantom of the present invention is by building Module is simulated emulation and calculates, clear in structure, simple and convenient, gears to actual circumstances, and can be that hydroelectric units primary frequency modulation examination carries For data more accurately.
The invention provides the checking system of a kind of hydroelectric units primary frequency modulation contributing electricity, imitate including utilizing Hydropower Unit True mode obtains theoretical active power；Then theoretical action device electricity calculating module is meritorious according to theoretical active power, theory Time that power is corresponding and theoretical action device electricity relational expression obtain the theoretical action integration electricity of hydroelectric units primary frequency modulation Amount, theoretical action device electricity calculates module and obtains water power according to the time that the actual power of Hydropower Unit, actual power are corresponding The actual act device electricity of unit primary frequency modulation, evaluation module, it is used for calculating actual act device electricity and theoretical action is amassed Divide the ratio of electricity, and judge whether ratio is more than predetermined threshold value, if it is, this primary frequency modulation of Hydropower Unit is by examining Core, otherwise, the most not by examination.
Visible, the present invention is first depending on the phantom of Hydropower Unit and obtains the theoretical active power of Hydropower Unit, and adopts Theoretical action device electricity is obtained by theoretical active power and the relation of time, then according to the theory utilizing this kind of mode to obtain The primary frequency modulation of Hydropower Unit is examined by action device electricity with actual act device electricity, owing to using which to obtain Theoretical action device electricity and actual act device electricity closer to, the most accurate, therefore, the result of appraisal are the most accurate Really, error rate is low, it is to avoid the primary frequency modulation using original computational methods to bring examines the present situation that compliance rate is low.
Refer to the wire examination method of a kind of hydroelectric units primary frequency modulation contributing electricity that Figure 12, Figure 12 provide for the present invention The flow chart of process, the method includes:
Step S101: Hydropower Unit phantom is according to frequency departure and active power deviation or guide vane opening deviation Obtain the theoretical active power of Hydropower Unit；Wherein, frequency departure is that frequency Setting signal deducts the frequency of Hydropower Unit and obtains Difference numerical value of obtaining after dead band processes, active power deviation is the reason that given theoretical active power deducts Hydropower Unit The difference that opinion active power obtains；Guide vane opening deviation is that given guide vane opening deducts the difference that the guide vane opening of Hydropower Unit obtains Value；
As preferably, Hydropower Unit phantom 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 particularly as follows:
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 actual guide vane opening signal according to target guide vane opening signal；
Hydraulic turbine prime mover model obtains theoretical active power according to actual guide vane opening signal.
As preferably, obtain Hydropower Unit according to frequency departure and active power deviation or guide vane opening deviation The process of target guide vane opening signal particularly as follows:
Receive frequency Setting signal and the frequency of Hydropower Unit, the frequency of frequency Setting signal with Hydropower Unit is carried out Do difference process, and the difference obtained is carried out dead band process obtain frequency departure；
Frequency departure carrying out the first ratio process respectively and the first differential processes, correspondence obtains the first numerical value and the second number Value；
Carrying out active power deviation with power difference coefficient being multiplied, it is poor to process or guide vane opening deviation and aperture are adjusted Coefficient carries out the process that is multiplied, and obtains third value；
Third value is added with frequency departure process, addition is processed the result obtained and carries out first integral process, Obtain the 4th numerical value；
First numerical value, second value and the 4th numerical value do addition process, obtain the 5th numerical value；
5th numerical value is carried out the first amplitude limiting processing, obtains target guide vane opening signal；
It is K that first ratio processes corresponding transmission functionp, the first differential processes corresponding transmission function and isThe Transmission function corresponding to one Integral Processing isWherein, KpIt is the first proportional gain, KIFor first integral gain, KDIt is first The differential gain, T1VIt it is the first derivative time constant.
As preferably, according to target guide vane opening signal obtain actual guide vane opening signal process particularly as follows:
Carry out target guide vane opening signal and currently practical guide vane opening signal doing difference process, and the difference obtained is divided Do not carry out the second ratio process, second integral processes and the second differential processes, then three numerical value obtained are carried out the second limit Width processes, and the result obtaining the second amplitude limiting processing is integrated, then the result of integration is carried out the 3rd amplitude limiting processing, obtains Actual guide vane opening signal；
Wherein, the second ratio processes corresponding transmission function is Kp', second integral processes corresponding transmission function and is It is K that second differential processes corresponding transmission functionD' S, wherein, Kp' it is the second proportional gain, KI' for second integral gain, KD' It it is second differential gain.
Step S102: it is corresponding according to theoretical active power, theoretical active power that theoretical action device electricity calculates module Time and theoretical action device electricity relational expression obtain the theoretical action device electricity of hydroelectric units primary frequency modulation, wherein, reason Opinion action device electricity relational expression is:
Q t = &Integral; t 0 t 0 + &Delta; t ( P t - P 0 ) d t / 3600 ;
Wherein, QtFor theoretical action device electricity；t0Moment for frequency departure overfrequency dead band；Δ t is that integration starts After primary frequency modulation process duration, wherein, Δ t is no longer than 60s, more than 60s with 60s calculate；Pt is that theory has Merit power；P0For t0Corresponding theoretical active power；
Step S103: it is corresponding according to the actual power of Hydropower Unit, actual power 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 the actual act device electricity ratio to theoretical action device electricity, and judges Whether ratio is more than predetermined threshold value, if it is, this primary frequency modulation of Hydropower Unit is by examination, otherwise, the most not by examining Core.
Introduction for the wire examination method of a kind of hydroelectric units primary frequency modulation contributing electricity of present invention offer refer to Stating system embodiment, the present invention does not repeats them here.
The invention provides the wire examination method of a kind of hydroelectric units primary frequency modulation contributing electricity, imitate including utilizing Hydropower Unit True mode obtains theoretical active power；Then theoretical action device electricity calculating module is meritorious according to theoretical active power, theory Time that power is corresponding and theoretical action device electricity relational expression obtain the theoretical action integration electricity of hydroelectric units primary frequency modulation Amount, theoretical action device electricity calculates module and obtains water power according to the time that the actual power of Hydropower Unit, actual power are corresponding The actual act device electricity of unit primary frequency modulation, evaluation module, it is used for calculating actual act device electricity and theoretical action is amassed Divide the ratio of electricity, and judge whether ratio is more than predetermined threshold value, if it is, this primary frequency modulation of Hydropower Unit is by examining Core, otherwise, the most not by examination.
Visible, the present invention is first depending on the phantom of Hydropower Unit and obtains the theoretical active power of Hydropower Unit, and adopts Theoretical action device electricity is obtained by theoretical active power and the relation of time, then according to the theory utilizing this kind of mode to obtain The primary frequency modulation of Hydropower Unit is examined by action device electricity with actual act device electricity, owing to using which to obtain Theoretical action device electricity and actual act device electricity closer to, the most accurate, therefore, the result of appraisal are the most accurate Really, error rate is low, it is to avoid the primary frequency modulation using original computational methods to bring examines the present situation that compliance rate is low.
It should be noted that in this manual, the relational terms of such as first and second or the like is used merely to one Individual entity or operation separate with another entity or operating space, and not necessarily require or imply these entities or operate it Between exist any this reality relation or order.And, term " includes ", " comprising " or its any other variant are intended to Contain comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include those Key element, but also include other key elements being not expressly set out, or also include for this process, method, article or set Standby intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that Other identical element is there is also in including the process of described key element, method, article or equipment.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention. Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one The widest scope caused.

Claims (10)

1. the checking system of a hydroelectric units primary frequency modulation contributing electricity, it is characterised in that including:
Hydropower Unit phantom, described for obtaining according to frequency departure and active power deviation or guide vane opening deviation The theoretical active power of Hydropower Unit；Wherein, described frequency departure is the frequency that frequency Setting signal deducts described Hydropower Unit The numerical value that the difference obtained obtains after dead band processes, described active power deviation deducts described for given theoretical active power The difference that the theoretical active power of Hydropower Unit obtains；Described guide vane opening deviation deducts described hydroelectric machine for given guide vane opening The difference that the guide vane opening of group obtains；
Theoretical action device electricity calculates module, for corresponding according to described theoretical active power, described theoretical active power Time and theoretical action device electricity relational expression obtain the theoretical action device electricity of hydroelectric units primary frequency modulation, wherein, institute Stating theoretical action device electricity relational expression is:
Q t = &Integral; t 0 t 0 + &Delta; t ( P t - P 0 ) d t / 3600 ;
Wherein, QtFor described theoretical action device electricity；t0Moment for frequency departure overfrequency dead band；Δ t is that integration starts After primary frequency modulation process duration, wherein, Δ t is no longer than 60s, more than 60s with 60s calculate；Pt is described reason Opinion active power；P0For t0Corresponding theoretical active power；
Actual act device electricity calculates module, for according to the actual power of described Hydropower Unit, described actual power correspondence Time obtain the actual act device electricity of hydroelectric units primary frequency modulation；
Evaluation module, for calculating the described actual act device electricity ratio to described theoretical action device electricity, and judges Whether described ratio is more than predetermined threshold value, if it is, this primary frequency modulation of described Hydropower Unit is by examination, otherwise, then Not by examination.
Calculate system the most as claimed in claim 1, it is characterised in that described Hydropower Unit phantom includes:
Electronic controller model, for obtaining described water according to frequency departure and active power deviation or guide vane opening deviation The target guide vane opening signal of group of motors；
Guide vane actuating mechanism model, for obtaining actual guide vane opening signal according to described target guide vane opening signal；
Hydraulic turbine prime mover model, for obtaining described theoretical active power according to described actual guide vane opening signal.
Calculate system the most as claimed in claim 2, it is characterised in that described electronic controller model specifically for:
Receive frequency Setting signal and the frequency of Hydropower Unit, the frequency to described frequency Setting signal Yu described Hydropower Unit Carry out doing difference process, and the difference obtained is carried out dead band process and obtain described frequency departure；
Described frequency departure carrying out the first ratio process respectively and the first differential processes, correspondence obtains the first numerical value and the second number Value；
Carry out active power deviation with power difference coefficient being multiplied and process or by guide vane opening deviation and aperture difference coefficient Carry out the process that is multiplied, obtain third value；
Described third value is added process with described frequency departure, addition is processed the result obtained and carries out at first integral Reason, obtains the 4th numerical value；
Described first numerical value, described second value and described 4th numerical value do addition process, obtain the 5th numerical value；
Described 5th numerical value is carried out the first amplitude limiting processing, obtains described target guide vane opening signal；
It is K that described first ratio processes corresponding transmission functionp, described first differential processes corresponding transmission function and isDescribed first integral processes corresponding transmission functionWherein, KpIt is the first proportional gain, KIFor first integral Gain, KDIt is first differential gain, T1VIt it is the first derivative time constant.
Calculate system the most as claimed in claim 2, it is characterised in that described guide vane actuating mechanism model specifically for:
Carry out described target guide vane opening signal and currently practical guide vane opening signal doing difference process, and the difference obtained is divided Do not carry out the second ratio process, second integral processes and the second differential processes, then three numerical value obtained are carried out the second limit Width processes, and the result obtaining the second amplitude limiting processing is integrated, then the result of integration is carried out the 3rd amplitude limiting processing, obtains Described actual guide vane opening signal；
Wherein, described second ratio processes corresponding transmission function is Kp', described second integral processes corresponding transmission function and isIt is K that described second differential processes corresponding transmission functionD' S, wherein, described Kp' it is the second proportional gain, KI' it is second Storage gain, KD' it is second differential gain.
Calculate system the most as claimed in claim 2, it is characterised in that the transmission function that described hydraulic turbine prime mover model is corresponding Relation is G1(s)+G2(s), wherein:
TwFor fluid inertia time constant；
G2S the equation of () correspondence is P=aY3+bY2+ cY+d, a, b, c and d are constant.
Calculate system the most as claimed in claim 2, it is characterised in that described hydraulic turbine prime mover model is only to consider rigidity water The preferable hydraulic turbine model hit, the transmission functional relationship that described hydraulic turbine prime mover model is corresponding is:
Wherein, TwFor fluid inertia time constant.
7. the wire examination method of a hydroelectric units primary frequency modulation contributing electricity, it is characterised in that including:
Hydropower Unit phantom, described for obtaining according to frequency departure and active power deviation or guide vane opening deviation The theoretical active power of Hydropower Unit；Wherein, described frequency departure is the frequency that frequency Setting signal deducts described Hydropower Unit The numerical value that the difference obtained obtains after dead band processes, described active power deviation deducts described for given theoretical active power The difference that the theoretical active power of Hydropower Unit obtains；Described guide vane opening deviation deducts described hydroelectric machine for given guide vane opening The difference that the guide vane opening of group obtains；
Theoretical action device electricity calculate module according to time corresponding to described theoretical active power, described theoretical active power with And theory action device electricity relational expression obtains the theoretical action device electricity of hydroelectric units primary frequency modulation, wherein, described theory Action device electricity relational expression is:
Q t = &Integral; t 0 t 0 + &Delta; t ( P t - P 0 ) d t / 3600 ;
Wherein, QtFor described theoretical action device electricity；t0Moment for frequency departure overfrequency dead band；Δ t is that integration starts After primary frequency modulation process duration, wherein, Δ t is no longer than 60s, more than 60s with 60s calculate；Pt is described reason Opinion active power；P0For t0Corresponding theoretical active power；
Theoretical action device electricity calculates module according to time corresponding to the actual power of described Hydropower Unit, described actual power Obtain the actual act device electricity of hydroelectric units primary frequency modulation；
Evaluation module calculates the described actual act device electricity ratio to described theoretical action device electricity, and judges described ratio Whether value, more than predetermined threshold value, if it is, this primary frequency modulation of described Hydropower Unit is by examination, otherwise, is not then passed through Examination.
8. computational methods as claimed in claim 7, it is characterised in that described Hydropower Unit phantom includes electronic controller Model, guide vane actuating mechanism model and hydraulic turbine prime mover model, described according to frequency departure and active power deviation or Person's guide vane opening deviation obtain the theoretical active power of described Hydropower Unit process particularly as follows:
Described electronic controller model obtains described water according to frequency departure and active power deviation or guide vane opening deviation The target guide vane opening signal of group of motors；
Described guide vane actuating mechanism model obtains actual guide vane opening signal according to described target guide vane opening signal；
Described hydraulic turbine prime mover model obtains described theoretical active power according to described actual guide vane opening signal.
9. computational methods as claimed in claim 8, it is characterised in that described according to frequency departure and active power deviation or Person's guide vane opening deviation obtain the target guide vane opening signal of described Hydropower Unit process particularly as follows:
Receive frequency Setting signal and the frequency of Hydropower Unit, the frequency to described frequency Setting signal Yu described Hydropower Unit Carry out doing difference process, and the difference obtained is carried out dead band process and obtain described frequency departure；
Described frequency departure carrying out the first ratio process respectively and the first differential processes, correspondence obtains the first numerical value and the second number Value；
Carry out active power deviation with power difference coefficient being multiplied and process or by guide vane opening deviation and aperture difference coefficient Carry out the process that is multiplied, obtain third value；
Described third value is added process with described frequency departure, addition is processed the result obtained and carries out at first integral Reason, obtains the 4th numerical value；
Described first numerical value, described second value and described 4th numerical value do addition process, obtain the 5th numerical value；
Described 5th numerical value is carried out the first amplitude limiting processing, obtains described target guide vane opening signal；
It is K that described first ratio processes corresponding transmission functionp, described first differential processes corresponding transmission function and isDescribed first integral processes corresponding transmission functionWherein, KpIt is the first proportional gain, KIFor first integral Gain, KDIt is first differential gain, T1VIt it is the first derivative time constant.
10. computational methods as claimed in claim 8, it is characterised in that described obtain according to described target guide vane opening signal The process of actual guide vane opening signal particularly as follows:
Carry out described target guide vane opening signal and currently practical guide vane opening signal doing difference process, and the difference obtained is divided Do not carry out the second ratio process, second integral processes and the second differential processes, then three numerical value obtained are carried out the second limit Width processes, and the result obtaining the second amplitude limiting processing is integrated, then the result of integration is carried out the 3rd amplitude limiting processing, obtains Described actual guide vane opening signal；
Wherein, described second ratio processes corresponding transmission function is Kp', described second integral processes corresponding transmission function and isIt is K that described second differential processes corresponding transmission functionD' S, wherein, described Kp' it is the second proportional gain, KI' it is second Storage gain, KD' it is second differential gain.
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