CN1933321B - Control device for motor output - Google Patents
Control device for motor output Download PDFInfo
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- CN1933321B CN1933321B CN 200610073707 CN200610073707A CN1933321B CN 1933321 B CN1933321 B CN 1933321B CN 200610073707 CN200610073707 CN 200610073707 CN 200610073707 A CN200610073707 A CN 200610073707A CN 1933321 B CN1933321 B CN 1933321B
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Abstract
The invention discloses a prime mover control device capable of preventing an electric power included in a feed back signal besides noise and generated between a dynamo and a power system from being enlarged, maintaining stable operation without generating interference to the power system. An offset detecting unit (1a) outputs an offset signal representing the offset between an instruction value and a current value, by an input of an output electric power instruction value signal representing an instruction value which becomes to an output electric power target of the dynamo driven by the prime mover and an output electric power signal representing the current value of the output electric power. A control unit (3a) outputs a control output signal for controlling the output of the prime mover by an input of the offset signal. A filter unit (2a) is provided which attenuates or removes a predetermined frequency component induced by the changes of an output electric power period from one signal of the output electric power signal, the offset signal and the control output signal, when the control unit (3a) outputs the control output signal, and the changes of the output electric power period are generated due to the disaccord between the output of the prime mover and the output electric power.
Description
Technical field
The present invention relates to utilize the hydraulic turbine, steam turbine, gas turbine, engine prime movers to make the generator rotation and produce the control device of prime mover output of the TRT of electrical power.
Background technology
Export in the control device of (machinery) torque at prime mover in the past; The coloured noise that in rotary speed detecting signal, comprises white noise such as sensor noise and produce owing to the grinding campaign of generator etc.; The problem that has stable output signal, the action of prime mover output (machinery) moment controlling system; In order to remove these noises, export-restriction, insensitive interval are set, remove the filter (for example patent documentation 1) of frequency band.
In addition; The device that also has is taken into the stand-by period arithmetic unit with the deviation of generator output instruction signal and alternator output signal; Judge oscillatory regime, addition is carried out in the output of deviation signal and stand-by period arithmetic unit, making control signal is 0 (for example patent documentation 2).
[patent documentation 1] spy opens 2002-233195 communique (paragraph 0017 to 0025, Fig. 1)
[patent documentation 2] spy opens flat 8-266095 communique (paragraph 0021 to 0028, Fig. 1)
Prime mover control device in the past constitutes as above; Though can remove the noise that comprises in the rotary speed detecting signal and prevent cataclysm; But because for the corresponding actions in the same old way still of the electrical power fluctuation component that between generator and electric power system, produces beyond the noise; Control prime mover output torque increases or reduces, and therefore depends on the moment of prime mover output cogging, enlarges its change under the situation about having conversely.In addition; In the mode that the stand-by period arithmetic unit is set; Because oscillatory extinction or increase, therefore in from the deviation in past of stand-by period arithmetic unit and the deviation in this moment, produce difference, during actual vibration so the problem of existence is; Control signal is not 0, unavoidably produces the vibration of generator output because of this difference.
Summary of the invention
The present invention proposes for the problem that solves above-mentioned that kind just, its purpose be to provide electrical power change beyond a kind of noise that can prevent to comprise in the feedback signal, that between generator and electric power system, produce enlarge, to electric power system produce disturb, and the control device of prime mover of continual and steady running.
The control device of prime mover output of the present invention; Have: the deviation detecting unit; This deviation detecting unit becomes by the input electric power signal of currency of the electromotive power output instruction value signal of the command value of the electromotive power output target of the generator of prime mover driven and expression electromotive power output expression as input, the deviation signal of output presentation directives value and the deviation of currency; As input, signal is exported in the control of output control prime mover output with this deviation signal for control unit, this control unit; And filter cell; When this filter cell is exported said control output signal at said control unit; From some signals of electromotive power output signal, deviation signal or control output signal, will decay or remove owing to the output of prime mover and the caused assigned frequency component of the inconsistent electromotive power output cyclical swing that produces of electromotive power output.
Because with its control that need not utilize prime mover to carry out; It would be better to through not controlling; And owing to utilizing filter cell will hinder the electromotive power output fluctuation component of the generator of stability to decay or removing; Therefore prime mover output need can not prevent to enlarge the change of electromotive power output for the electromotive power output change corresponding actions of generator.
Description of drawings
The block diagram of the control mode of the prime mover control device of the TRT for example 1 of the present invention shown in Figure 1.
Shown in Figure 2 is the illustraton of model of one machine infinity bus system.
Shown in Figure 3 is the action diagram of electrical power change between generator and the electric power system.
Shown in Figure 4 is the control mode block diagram of the prime mover control device of example 2 of the present invention.
Shown in Figure 5 is the control mode block diagram of the prime mover control device of example 3 of the present invention.
Shown in Figure 6 is the control mode block diagram of the prime mover control device of example 4 of the present invention.
Shown in Figure 7 is the control mode block diagram of the prime mover control device of example 5 of the present invention.
Shown in Figure 8 is the control mode block diagram of the prime mover control device of example 5 of the present invention.
Shown in Figure 9 is the control mode block diagram of the prime mover control device of example 5 of the present invention.
Shown in Figure 10 is the control mode block diagram of the prime mover control device of example 5 of the present invention.
Shown in Figure 11 is the control mode block diagram of the prime mover control device of example 6 of the present invention.
Shown in Figure 12 is the rotating speed of one machine infinity bus system and the relation of frequency.
Shown in Figure 13 is the control mode block diagram of the prime mover control device of example 7 of the present invention.
Shown in Figure 14 is the control mode block diagram of the prime mover control device of example 8 of the present invention.
Block diagram of giving an example for the feedback signal compute mode of example 9 of the present invention shown in Figure 15.
[label declaration]
1a, 1b, 1c deviation detecting unit
2a, 2b filter cell
3 control units are the PI circuit
6a, 6b phasing unit
7a, 7b change-detection unit
8a, 8b phasing unit
9a, 9b adder unit
10b, 10c, 10d control unit i.e. degree of setting
11 switch units
13 converter units are the sensitivity adjustment rate
14 differentiation elements
15 adder units
Embodiment
Example 1
The control mode block diagram of the prime mover control device of the TRT for example 1 of the present invention shown in Figure 1.In Fig. 1; From command value these generating equipments of supply such as plan of needs, that become the electromotive power output target is that the electrical power command value is imported to deviation detecting unit 1a; The output power signal of electromotive power output currency that use as feedback signal in addition, expression generator (not shown) is imported to deviation detecting unit 1a through filter cell 2a equally.In deviation detecting unit 1a, obtain the deviation of electrical power command value and filtered electromotive power output signal, deviation signal is exported.Based on the deviation signal of this deviation detecting unit 1a output, from example of control module of the response of adjustment control system and stability, promptly carry out the PI circuit 3 of proportional+integral control, the control output signal of output adjustment prime mover output usefulness.If the hydraulic turbine; Then should supply with the guide vane opening control system by control output signal; If steam turbine; The opening control system of then should control output signal supplying with boiler control system or steam adjuster valve is if gas turbine then should control output signal be supplied with prime mover output adjustment part of combustion control system etc.
Filter cell 2a utilizes the fluctuation component that will not respond to decay or the filter of the mean value computing of removing, utilize certain hour, low-frequency band through the low pass filter of (high frequency band is decayed or removed) and the formations such as notch filter that specific frequency components is decayed or removes.
Below, the action situation is described.
Electromotive power output P when generator is connected with electric power system
eIn the one machine infinity bus system of the Fig. 2 that simplifies, represent with formula 1.
In addition, in Fig. 2, E
FdBe reverse voltage, V
bBe the voltage of infinite busbar 4, X is 4 reactance from generator 5 to infinite busbar, and δ is the phase angle of generator 5.
Shown in Figure 3 is the action diagram of the electrical power change between generator and the electric power system, and establishing transverse axis is phase angle δ, and the longitudinal axis is electromotive power output P
e, at the electromotive power output P of expression 1
eThe performance plot of characteristic in, the action diagram when adding output that expression drives prime mover of generator and changing.
In performance plot, single loop open circuit etc. is arranged and the reactance X of power transmission line when increasing, increase before and increase after P-δ curve, represent the electromotive power output P when prime mover output changes with its variation on the right side of performance plot
eChange is in time represented phase angle δ change in time at the downside of performance plot.
Under stable state, at the output P of prime mover
M0Power output P with generator
eCharacteristic intersection point a, promptly with phase angle δ
0Running.
When the reactance X of power transmission line increases in that the single loop open circuit is arranged, the electromotive power output P of generator
eChange, following change takes place.
(1) working point changes to the b point from a point.In this case, electromotive power output P
eChange, but phase angle δ does not change.
(2) because electromotive power output P
eOutput P less than prime mover
M0, so generator quickens.Then, surpass electromotive power output P
eOutput P with prime mover
M0Consistent point is the c point and quickens.As if the rotational loss that can ignore generator and resistance loss etc., loss is 0, then quickens the d point up to the area of the area that becomes Δ abc=Δ cde.
(3) one arrive the d points, then electromotive power output P next
eOutput P greater than prime mover
M0, generator slows down.If loss is 0, then slow down up to the b point.
(4) if loss is 0, the electromotive power output P between this b-d then
eContinue change, but in fact owing to there being various losses, towards suppressing electromotive power output P
eThe direction of change works, and therefore finally converges on c point (P
e=P
M0, δ=δ
s).In addition, this electromotive power output P
eVariable cycle depend on by the synchronizing power that characteristic determined of electric power system and generator and the inertia constant of rotary body.
In addition, in order to eliminate electrical power command value and electromotive power output P
eDeviation and the prime mover control device controlled because towards suppressing this electromotive power output P
eThe direction action of change, so the output of prime mover changes.
Though the characteristic of prime mover is depended in this variation, in (1) when the working point when the b point changes, in case the output of prime mover increase, then the area of Δ abc, be that acceleration energy increases, quicken up to electromotive power output P
eChange point d point when not changing greater than the output of prime mover.
Then, in (3) when the working point when the d point changes, in case the output of prime mover reduce, then the area of Δ cde, promptly the energy that slows down increases, slow down up to electromotive power output P
eChange point b point when not changing less than the output of prime mover.Repeat these actions, thereby vibration enlarges.
In this example 1; Because that kind of above explanation; With its control that need not utilize prime mover to carry out, example is not so good as through not controlling, for the electromotive power output fluctuation component of the generator that hinders stability; The electromotive power output signal that makes generator is through filter cell 2a; After this fluctuation component decayed or remove, obtain the deviation with the electrical power command value with deviation detecting unit 1a, therefore the control output signal based on the deviation signal of this deviation detecting unit 1a output becomes decay or has removed the signal of unwanted fluctuation component.Through like this, the output of prime mover need with the electromotive power output change corresponding actions of generator, can prevent to enlarge power variation.
In addition; Adjustment about the component removed with filter cell 2a; Except the cycle based on this fluctuation component is the carrying out decided of the inertia constant according to synchronizing power and rotary body as previously mentioned, it is also conceivable that with physical device method such as condition to be changed adjust.
More than be to be illustrated for the local mode component in the model of one machine infinity bus system; But the fluctuation component that can take place owing to formation, utilization and the generator constant of electric power system; Promptly with its control that need not utilize prime mover to carry out; It would be better to through not controlling at the component that hinders stability, between other generator that in multimachine system, produces and the component of system's inter mode etc. with ining addition, equally also can enough filter cell 2a decay or remove about these components.
In addition, the example shown in Fig. 1 is that position, insertion section with filter cell 2a is before deviation detecting unit 1a.If constitute like this, following advantage is then arranged: the later unwanted corresponding actions of deviation detecting unit 1a is avoided in (1); (2) prevent because of amplitude limiter or saturated error that produces and non-linearization; (3) when control model is switched, carry out the switching of deviation signal easily, but, can access the effect that change suppresses too any position that filter cell 2a places (comprising prime mover part) after the deviation detecting unit 1a.
Example 2
In example 1, narrated through decay or remove the fluctuation component that do not need corresponding actions, prevent the mode that the electrical power change enlarges, and in this example 2, be depicted as the control mode of positive this change of inhibition.
Shown in Figure 4 is the control mode block diagram of the prime mover control device of example 2 of the present invention.In Fig. 4, before PI circuit 3, place by hysteresis lead-circuit (H T
1S), (1+T
2S) etc. the phasing unit 6a that constitutes is to replace the filter cell 2a of Fig. 1.This phase place adjustment is identical with example 1, and is final for utilizing physical device adjustment.
With this phasing unit 6a, make the electromotive power output P of the output of prime mover with respect to generator
eChange and the increase and decrease that occurs produces such variation in the following moment, thereby through the action below the repetition, vibration is restrained.
(1) when the b point changes, the output of prime mover is reduced.The area of Δ abc, be that acceleration energy reduces, only quicken up to electromotive power output P
eThe point that change point d when the output that is lower than prime mover does not change is ordered.
(2) output of prime mover that d orders is increased.The area of Δ cde, promptly the energy that slows down reduces, but can not decelerate to electromotive power output P
eChange point b point when the output that is lower than prime mover does not change.
In addition; Example shown in Fig. 4 is between deviation detecting unit 1a and PI circuit 3, to insert phasing unit 6a, but also can deviation detecting unit 1a be set equally with example 1, makes the electromotive power output signal as input; Perhaps be arranged on after the PI circuit 3, also bring into play same effect.
In addition; At the object output that comprises control output signal is that prime mover characteristic of the output adjustment part of servo system or burning control etc. is when changing with operating condition; Through a plurality of above-mentioned phasing unit 6a are set; Additional switch or change the unit of the constant of phasing unit 6a, also can tackle according to operating condition according to operating condition.
Example 3
In example 2; Be depicted as for the moment of adjusting the output that increases and decreases prime mover the mode of control unit series connection insertion phasing unit 6a; But the mode shown in this example 3 is; New additional only with the circuit of the change part corresponding actions of the electromotive power output of generator, through the output of positive increase and decrease prime mover, thereby suppress the change of the electromotive power output of generator.
Shown in Figure 5 is the control mode block diagram of the prime mover control device of example 3 of the present invention.The formation of Fig. 5 is the formation of Fig. 1 to be appended the change-detection unit 7a and the phasing unit 8a of the change component that detects the electromotive power output signal, appends the adder unit 9a that the output of the output phase phasing unit 8a of PI circuit 3 is carried out generating after the addition control output signal again.
Change-detection unit 7a is by the differential circuit that only takes out fluctuation component and band pass filter circuit that the component of the variable cycle of regulation passes through etc. is constituted, and phasing unit 8a is identical with phasing unit 8a, by hysteresis lead-circuit (1+T
1S), (1+T
2Formation such as s).The adjustment of phase place and example 2 carry out equally.
In the formation of Fig. 5; Because when the electromotive power output change of generator; Only take out the signal of this fluctuation component with changing detecting unit 7a; By phasing unit 8a adjustment phase place, making becomes the increase and decrease of the output of prime mover of example 2 described inhibition changes constantly, again by adder unit 9a; As control output signal; Carry out the increase and decrease of the output of prime mover, therefore identical with example 2, can suppress the change of the electromotive power output of generator.
In addition; In this example 3; Since adopt new additional only with the formation of the circuit of the fluctuation component corresponding actions of electromotive power output signal, employing can be adjusted the mode of common electrical power control and change control respectively, therefore can adjust to optimum state as function separately.
In addition; Constituting shown in Fig. 5 is provided with suppresses the separatory filter cell 2a of control with electrical power control and fluctuation component for the electrical power command value; Even but filter cell 2a is not set; And additional change-detection unit 7a and phasing unit 8a utilize the adjustment of phasing unit 8a, also can access same effect.
Equally; Even additional change-detection unit 7a of mode and the phasing unit 8a of phasing unit 6a are set in the electrical power control for the electrical power command value as implementing form 2; Utilize the adjustment of phasing unit 6a and 8a, also can access same effect.
In addition, export prime mover output adjustment part that the object output of signal is servo system or burning control etc., also can access same effect even certainly control is directly supplied with in the output of phasing unit 8a.
Example 4
If establishing the output torque of prime mover is Tm, the output torque of generator is that the inertia constant of Te, rotary body is M, and the rotating speed deviation is Δ ω, and then these satisfy the relation shown in the formula 2.In addition, s is a Laplacian.
In example 3; Be depicted as the electromotive power output signal of the generator that the output of prime mover control is used, through change-detection unit 7a and phasing unit 8a and utilize adder unit 9a to carry out the mode of addition; Even but have the relation of formula 2 between the output torque of the output torque of rotational speed omega and generator and prime mover; As shown in Figure 6 rotational speed omega is carried out addition through change-detection unit 7b and phasing unit 8b, also can access same effect.
Example 5
In example 1 to 3, be electrical power control, but the rotating speed controlled function that increases and decreases prime mover output according to change in rotational speed also can be set in the control of prime mover about the electromotive power output of the electrical power command value being controlled generator as target.This example 5 is about this rotating speed control.
Fig. 7 to Fig. 9 is depicted as the formation example of example 5 respectively; Be for Fig. 1,4 and 5 formation; Respectively the electrical power command value is replaced into rotary speed instruction value (being generally rated speed); With feedback signal is that the electromotive power output of generator is replaced into tach signal, is that PI circuit 3 is replaced into setting rate 10b with control unit then.In addition, tach signal is to detect through the gear of installing in prime mover rotating shaft etc., and setting rate 10b is that the output of prime mover changes the size with respect to rotation speed change.
Quicken or slow down based on the difference of the electromotive power output of the output of prime mover and generator, thus the rotation speed change of prime mover.Thereby, in case the change of the electromotive power output of generator takes place, then tach signal change, corresponding then control output signal with setting rate 10c changes, and the output of prime mover is changed.About rotating speed control too, based on the moment of the output change of this prime mover since with the same effect described in the example 1, cause that the change of the electromotive power output of generator enlarges.
Therefore, constitute, utilize the effect same, in rotating speed control, also can bring into play and effect that electrical power control is same with example 1 to 3 through Fig. 7 to Fig. 9 is such.
In addition; In the formation of Fig. 9; Be depicted as used tach signal in the rotating speed control is carried out addition through change-detection unit 7b and phasing unit 8b in adder unit 9b mode, but owing to have the relation of formula 2 between the electromotive power output of rotating speed and generator, even therefore shown in figure 10; The electromotive power output of generator is carried out addition through change-detection unit 7a and phasing unit 8a constitute, also can access same effect.
Example 6
Shown in Figure 11 is the formation example of example 6.In Figure 11; In deviation detecting unit 1c; Obtain reference frequency (for 50Hz or 60Hz) and deviation, be transformed to the controlled quentity controlled variable of the output of prime mover, will control and export signal and export according to setting rate 10c as the frequency signal of the generator terminal of feedback signal or system side.Supply with prime mover output adjustment part through controlling the output signal, suppressed the frequency variation of generator terminal or system side.
Usually,, the revolution detector of high Precision Detection rotating speed is set,, can use the rotating speed of prime mover therefore as the feedback signal of rotating speed control for the control of prime mover rotating speed before the parallel connection.The relation of this rotating speed (angle ω=2 π f, f is a frequency) and phase angle δ is ω=d δ/dt, and when considering with one machine infinity bus system shown in Figure 2, infinite a little bigger phase angle δ is changed to 0, i.e. the variation of frequency f also is 0.If with this diagrammatic representation, then shown in figure 12, get over the approach infinity point, the variation of frequency f is more little.Generally, because the internal electrical Chinese People's Anti-Japanese Military and Political College of generator, so generator terminal approach infinity point, frequency change reduces.In addition, under the situation of the separate payment of separating from big electric power system etc., the frequency of system decides according to the supply and demand state in the separate payment, the rotating speed Approximate Equivalent of this and prime mover.
The purpose of rotating speed when being connected with electric power system control is, when frequency changes according to the variation of the supply and demand state of whole electric power system, recovers reset condition in order to make its, increase and decrease the output of prime mover according to the setting rate.Thereby, when being connected, adopt tach signal to carry out rotating speed control with electric power system, can form excessive control, the electrical power change is enlarged.
As this example 6, the frequency through adopting generator terminal or system side is as feedback signal, and the output that can suppress excessive prime mover changes, and prevents that the change of the electromotive power output of generator from enlarging.Certainly, under the state that separates from electric power system, as previously mentioned, frequency variation and rotating speed change are equivalent, can keep and identical in the past control.
In addition; The formation of Figure 11 is from the formation for Fig. 7 the rotary speed instruction value to be replaced into reference frequency, tach signal to be replaced into the formation of removing filter cell 2b the formation of frequency signal; Even but for this formation; To shown in Figure 10, append filter cell 2b and phasing unit 8b etc. like Fig. 7, also can access the effect same with example 5.
Example 7
In example 6, be depicted as the mode of frequency of utilization signal, but when unloaded or during separate payment, compare the precision of control and sensitivity reduction with the mode of using tach signal parallelly connected with system as the signal of rotating speed control.This example 7 addresses this problem just.
Shown in Figure 12 is the formation example of example 6.In Figure 12, switch unit 11 carries out the switching of which signal of frequency of utilization signal and tach signal according to the input of separate payment/airborne signals.Separate payment/airborne signals is the status signal that transmits during at the operate condition of system and coupling circuit breaker and from the separate payment state of electric substation; Be to be to be the signal of " 0 " under " 1 ", the common operating condition in addition when separate payment or Light Condition, switch unit 11 makes C=A, makes the C=B that kind switch the input to setting rate 10d when being " 1 " when this separate payment/airborne signals is " 0 ".
By such formation; Because when the common operating condition that generator is connected with power system; The deviation signal A of selection reference frequency and frequency signal; Be transformed to the control signal of the output of prime mover with setting rate 10d; Export as control signal; In addition when separate payment or Light Condition; Select the deviation signal B of rotary speed instruction value and tach signal; Be transformed to the control signal of the output of prime mover with setting rate 10d; Export as control output signal; Therefore no matter when, can both high accuracy, suppress the rotating speed change in high sensitivity.
In addition; Be the example before switch unit 11 is placed setting degree 10d shown in Figure 12; Even but adopt the formation that frequency and rotating speed are provided with setting rate 10d respectively, switch then; Adopt the mode of switching the set point of switching the setting rate simultaneously etc. with signal, also can access same effect.In addition, also can again frequency and fiducial value be compared, again rotating speed and fiducial value compared, thereby the deviation detecting unit is not set one by one, and come switching frequency and rotating speed in its prime.
In addition; In Figure 12; The operating condition signal that is depicted as the operate condition etc. of employing system and coupling circuit breaker switches the formation of the signal of usefulness as control signal, but as previously mentioned, because the variation of the frequency of rotating speed and generator terminal or system has bigger difference when being connected with electric power system; And this difference diminishes when zero load or separate payment; Therefore also can utilize this characteristic, the difference that is arranged on rotating speed and frequency is judged to be zero load or separate payment state when diminishing circuit switches with this signal.
In addition; Illustrated in fig. 12 be the formation of reactive filter etc.; But can adopt this switch unit 11 to the formation of Fig. 7 to Figure 10 of example 5, in the formation that adopts filter, phasing unit or change-detection unit and phasing unit, can not be only to control according to rotating speed also; And switch according to operating condition and to use tach signal and frequency signal, control like this.
Example 8
In example 7, said mode for coming switching frequency signal and tach signal based on operating condition is if but this mode then must be provided with two kinds of test sections of rotating speed test section and frequency detecting portion.
But shown in figure 13, the relation of rotating speed change and the frequency variation of anywhere is by to the ratio decision of the reactance X in this place, under the situation of generator terminal, reaches X through rotating speed is changed
e/ (X
d+ X
e) doubly (being called the sensitivity adjustment rate), just can be transformed to the frequency signal of generator terminal 12 equivalent and big or small.
This example 8 is according to above-mentioned principle, can bring into play the effect identical with example 7 with single detector, and shown in Figure 14 is its formation example.In Figure 14, utilizing converter unit is sensitivity adjustment rate 13, tach signal is transformed to the frequency variation sensitivity in the place of wanting to suppress to change.
Through such formation; In the device of the single input signal that tach signal is only arranged; Also identical with example 7; When separate payment/airborne signals is " 0 ", make C=A, be that " 1 " makes C=B such,, thereby can realize control according to operating condition with the input of switch unit 11 selections to setting rate 10d.
In addition, if the setting rate that has setting rate in the past and revise according to the sensitivity adjustment rate, thus switch setting rate 10d, also can access same effect.
In addition; In this example 8,, come the speed-changing signal and it is transformed to the signal of the change sensitivity of frequency according to operating condition through adopting switch unit 11; Can be with such Fig. 7 that is configured for example 5 and the formation of Figure 10, this situation is identical with example 7.
Example 9
Shown in example 1 to 4 do; For controlling the prime mover control device that makes that the electromotive power output of generator equates with the electrical power command value; And under the situation about controlling with the change corresponding actions of the electromotive power output of generator; According to the output time of prime mover, might enlarge the change of the electromotive power output of generator, be depicted as its suppressor mode in addition.
As shown in Figure 2, under stable state, the output of prime mover equates with the electromotive power output of generator, and unequal during earthquake.Promptly; Because the electromotive power output power of generator that will be different with the output of prime mover is controlled as feedback signal; Therefore do not need the change of corresponding actions to respond for output control as original prime mover; The output of prime mover is changed, thereby might enlarge the change of the electromotive power output of generator.
This example 9 relates to through computing obtains the signal approaching with the output of prime mover; Adopt this signal as feedback signal; Thereby prevent the unwanted corresponding actions of prime mover control device, the mode that the change of the electromotive power output through avoiding generator like this enlarges.
Shown in Figure 15 be feedback signal compute mode for example.In Figure 15; The speed error signal of the deviation of rated speed and the actual speed of expression generator is imported to differentiation element 14; In adder unit 15, the electromotive power output signal of generator and the output of differentiation element 14 are carried out addition, output is applicable to prime mover output equivalent signal of the output control of prime mover.
If it is small and near rated speed, turn round to establish the change of rotating speed, then the output torque T of prime mover in the formula 2
mThe output P of ≈ prime mover
m, the output torque T of generator
eThe electromotive power output P of ≈ generator
e, the output of prime mover is represented with formula 3.
P
m=P
e+ Δ ω Ms formula 3
Figure 15 representes following formula with block diagram.That is, because the power output P of generator
eDuring change, according to the output P of prime mover
mDeviation, generator quickens or slows down, rotation speed change is therefore through the electromotive power output P with this fluctuation component and generator
eCarry out addition, utilize computing to obtain the output P of prime mover
m, as prime mover output equivalent signal.Thereby, at the electromotive power output P of generator only
eDuring variation,, therefore can prevent the corresponding actions of unwanted prime mover control device because prime mover output equivalent signal does not change.
In addition, differentiation element 14 can be the pure differential function, also can be the incomplete differential function, in addition, under the situation of numerical control device, even according to former numerical value for the mode that calculate to change etc., also can access same effect.
In addition; In this example 9; Be depicted as the mode of the output change of the unwanted prime mover that can avoid causing because of the change of the electromotive power output of generator only; But might be, and form such moment of change that the control of carrying out because of this change enlarges the electromotive power output of generator because of the influence of the change of the output of prime mover itself or loss or because of the arithmetic eror of the electrical power detection of the electromotive power output of generator etc. produces change.Therefore,, also more be suitable for the mode of example 1 to 4, and can be prevented the effect that the change of the electromotive power output of generator enlarges for the mode shown in this example 9.
Claims (25)
1. the control device of prime mover output is characterized in that having
Expression is become by the electromotive power output instruction value signal of the command value of the target of the electromotive power output of the generator of prime mover driven and the electromotive power output signal of currency of representing said electromotive power output as input the deviation detecting unit of the deviation signal of the deviation of output said command value of expression and said currency;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal; And
From some signals of said electromotive power output signal, said deviation signal or said control output signal, the filter cell that will decay or remove owing to the output and the inconsistent caused assigned frequency component of said electromotive power output cyclical swing that produces of said electromotive power output of said prime mover.
2. the control device of prime mover output is characterized in that having
Expression is become by the electromotive power output instruction value signal of the command value of the target of the electromotive power output of the generator of prime mover driven and the electromotive power output signal of currency of representing said electromotive power output as input the deviation detecting unit of the deviation signal of the deviation of output said command value of expression and said currency;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal; And
Make the phasing unit of preceding or the hysteresis of the phase place of some signals of said electromotive power output signal, said deviation signal or said control output signal.
3. the control device of prime mover output is characterized in that having
Expression is become by the electromotive power output instruction value signal of the command value of the target of the electromotive power output of the generator of prime mover driven and the electromotive power output signal of currency of representing said electromotive power output as input the deviation detecting unit of the deviation signal of the deviation of output said command value of expression and said currency;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal;
Said electromotive power output signal as input, is extracted from this input signal because of the go forward side by side change-detection unit of line output of the caused assigned frequency component of cyclical swing of the output of said prime mover and the inconsistent said electromotive power output that produces of said electromotive power output;
As input, output makes the phasing unit of the leading or correction signal that lags behind of this phase of input signals with said frequency component; And
This correction signal and said control are exported the adder unit that signal carries out addition.
4. the control device of prime mover output is characterized in that having
With expression by the frequency signal of the frequency currency of the output of the generator of prime mover driven or the electric power system that is connected with said generator as input, this input signal of output expression deviation detecting unit with the deviation signal of the deviation of the reference frequency of the input or the said electric power system of storing in advance from the outside; And
With the control unit of this deviation signal as the control output signal of input, the said prime mover output of output control.
5. the control device of prime mover output is characterized in that having:
The tach signal of rotating speed currency of rotary speed instruction value signal and expression prime mover of target that will become rotating speed is as input, the deviation detecting unit of the deviation signal of the deviation of output said rotary speed instruction value signal of expression and said currency;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal; And
From some signals of said rotary speed instruction value signal, said deviation signal or said control output signal, the filter cell that will decay or remove owing to the caused assigned frequency component of cyclical swing of the output of said prime mover and the inconsistent said rotary speed instruction value that produces of said electromotive power output.
6. the control device of prime mover output is characterized in that having
The tach signal of rotating speed currency of rotary speed instruction value signal and expression prime mover of target that will become rotating speed is as input, the deviation detecting unit of the deviation signal of the deviation of output said rotary speed instruction value signal of expression and said currency;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal; And
Make the phasing unit of preceding or the hysteresis of the phase place of some signals of said rotary speed instruction value signal, said deviation signal or said control output signal.
7. the control device of prime mover output is characterized in that having
The tach signal of rotating speed currency of rotary speed instruction value signal and expression prime mover of target that will become rotating speed is as input, the deviation detecting unit of the deviation signal of the deviation of output said rotary speed instruction value signal of expression and said currency;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal;
Said rotary speed instruction value signal as input, is extracted from this input signal because of the go forward side by side change-detection unit of line output of the caused assigned frequency component of cyclical swing of the output of said prime mover and the inconsistent said electromotive power output that produces of said electromotive power output;
As input, output makes the phasing unit of the leading or correction signal that lags behind of this phase of input signals with said frequency component; And
This correction signal and said control are exported the adder unit that signal carries out addition.
8. the control device of prime mover output is characterized in that having
Will be from the reference frequency of outside input or the said electric power system of storage in advance and expression by the frequency signal of the frequency currency of the output of the generator of prime mover driven or the electric power system that is connected with said generator as input, the deviation detecting unit of deviation signal of deviation of reference frequency and the said currency of said electric power system is represented in output;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal; And
From some signals of said frequency signal, said deviation signal or said control output signal, the filter cell that will decay or remove owing to the output and the inconsistent caused assigned frequency component of said electromotive power output cyclical swing that produces of said electromotive power output of said prime mover.
9. the control device of prime mover output is characterized in that having
Will be from the reference frequency of outside input or the said electric power system of storage in advance and expression by the frequency signal of the frequency currency of the output of the generator of prime mover driven or the electric power system that is connected with said generator as input, the deviation detecting unit of deviation signal of deviation of reference frequency and the said currency of said electric power system is represented in output;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal; And
Make the phasing unit of preceding or the hysteresis of the phase place of some signals of said frequency signal, said deviation signal or said control output signal.
10. the control device of prime mover output is characterized in that having
Will be from the reference frequency of outside input or the said electric power system of storage in advance and expression by the frequency signal of the frequency currency of the output of the generator of prime mover driven or the electric power system that is connected with said generator as input, the deviation detecting unit of deviation signal of deviation of reference frequency and the said currency of said electric power system is represented in output;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal;
Said frequency signal as input, is extracted from this input signal because of the go forward side by side change-detection unit of line output of the caused assigned frequency component of cyclical swing of the output of said prime mover and the inconsistent said electromotive power output that produces of said electromotive power output;
As input, output makes the phasing unit of the leading or correction signal that lags behind of this phase of input signals with said frequency component; And
This correction signal and said control are exported the adder unit that signal carries out addition.
11. the control device of prime mover output is characterized in that having
Expression is become by the electromotive power output instruction value signal of the command value of the target of the electromotive power output of the generator of prime mover driven and the electromotive power output signal of currency of representing said electromotive power output as input the deviation detecting unit of the deviation signal of the deviation of output said command value of expression and said currency;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal;
With the tach signal of the rotating speed currency of expression prime mover or expression by the frequency signal of the frequency currency of the output of the generator of prime mover driven or the electric power system that is connected with said generator as input, extraction is because of the go forward side by side change-detection unit of line output of the caused assigned frequency component of cyclical swing of the output of said prime mover and the inconsistent said electromotive power output that produces of said electromotive power output from this input signal;
As input, output makes the phasing unit of the leading or correction signal that lags behind of this phase of input signals with said frequency component; And
This correction signal and said control are exported the adder unit that signal carries out addition.
12. the control device of prime mover output is characterized in that having
The tach signal of rotating speed currency of rotary speed instruction value and expression prime mover of target that will become said rotating speed is as input, the deviation detecting unit of the deviation signal of the deviation of output said rotary speed instruction value of expression and said currency;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal;
Said tach signal as input, is extracted from this input signal because of the go forward side by side change-detection unit of line output of the caused assigned frequency component of cyclical swing of the output of said prime mover and the inconsistent said electromotive power output that produces of said electromotive power output;
As input, output makes the phasing unit of the leading or correction signal that lags behind of this phase of input signals with said frequency component; And
This correction signal and said control are exported the adder unit that signal carries out addition.
13. the control device of prime mover output is characterized in that having
Will be from the reference frequency of outside input or the said electric power system of storage in advance and expression by the frequency signal of the frequency currency of the output of the generator of prime mover driven or the electric power system that is connected with said generator as input, the deviation detecting unit of deviation signal of the deviation of said rotary speed instruction value and said currency is represented in output;
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal;
The reference frequency of said electric power system as input, is extracted from this input signal because of the go forward side by side change-detection unit of line output of the caused assigned frequency component of cyclical swing of the output of said prime mover and the inconsistent said electromotive power output that produces of said electromotive power output;
As input, output makes the phasing unit of the leading or correction signal that lags behind of this phase of input signals with said frequency component; And
This correction signal and said control are exported the adder unit that signal carries out addition.
14. the control device of prime mover output is characterized in that having
Had or not signal that electric power system connects as input by the generator of prime mover driven expression; When being judged as said connection; The frequency signal of the output of the said generator of selection expression or the frequency currency of said electric power system; Be judged as when not having said connection, selecting the 1st switch unit of tach signal of the rotating speed currency of the said prime mover of expression;
With the selection signal of said the 1st switch unit as input, the deviation detecting unit of the deviation signal of the deviation of the fiducial value of output this input signal of expression and said rotating speed or said frequency; And
As input, the control unit of signal is exported in the control of the said prime mover output of output control with said deviation signal.
15. the control device of prime mover output is characterized in that having
With the tach signal of the currency of expression prime mover rotating speed as input, and output this tach signal of expression and input, or the 1st deviation detecting unit of the 1st deviation signal of the deviation of the rotating speed fiducial value of storage in advance from the outside;
With expression by the frequency signal of the currency of the frequency of generator output end of prime mover driven or electric power system as input, and output this frequency signal of expression and output, or the 2nd deviation detecting unit of the 2nd deviation signal of the deviation of stored frequency fiducial value in advance from the outside;
The 1st switch unit; The 1st switch unit will be represented signal that whether generator by prime mover driven be connected with electric power system as input, and when judging that generator has when connection with electric power system, select said the 2nd deviation signal; When being judged as when not connecting, select said the 1st deviation signal; And
With the selected signal of said the 1st switch unit as input, and the control unit of the control of the output of the said prime mover of output control output signal.
16. the control device of prime mover output is characterized in that having
With the tach signal of the currency of expression prime mover rotating speed as input, and output this tach signal of expression and input, or the 1st deviation detecting unit of the 1st deviation signal of the deviation of the rotating speed fiducial value of storage in advance from the outside;
With said the 1st deviation signal as input, and the 1st control unit of the 1st control output signal of the output of output control prime mover;
With expression by the frequency signal of the currency of the frequency of generator output end of prime mover driven or electric power system as input, and output this frequency signal of expression and output, or the 2nd deviation detecting unit of the 2nd deviation signal of the deviation of stored frequency fiducial value in advance from the outside;
With said the 2nd deviation signal as input, and the 2nd control unit of the 2nd control output signal of the output of output control prime mover; And
The 1st switch unit; The 1st switch unit will be represented signal that whether generator by prime mover driven be connected with electric power system as input, and when judging that generator has when connection with electric power system, select said the 2nd deviation signal; When being judged as when not connecting, select said the 1st deviation signal.
17. the control device of prime mover output is characterized in that having
The tach signal of rotating speed currency that expression is driven prime mover of generator carries out conversion, makes that the frequency of the electric power system that is connected with said generator is equivalent, and the converter unit that the equivalent signal after the conversion is exported;
Have or not the signal that is connected with said electric power system as input in the said generator of expression, when being judged as said connection, selecting said tach signal, be judged as when not having said connection, select the 1st switch unit of said equivalent signal;
The signal that said the 1st switch unit is selected is as input, the deviation detecting unit of the deviation signal of the deviation of the fiducial value of output this input signal of expression and said rotating speed or said frequency; And
As input, the control unit of signal is exported in the control of the said prime mover output of output control with the deviation signal of utilizing said deviation detecting unit output.
18. the control device of prime mover output is characterized in that having
The tach signal of rotating speed currency of prime mover that expression is driven generator is as input, this tach signal of output expression and the input or the deviation detecting unit of the deviation signal of the deviation of the said rotating speed fiducial value of storage in advance from the outside;
Said deviation signal is carried out conversion; Make that the reference frequency of the electric power system be connected with said generator is equivalent with the deviation of the frequency signal of the frequency currency of the said electric power system of expression, and the converter unit that the equivalent signal after such conversion is exported;
Have or not the signal that is connected with said electric power system as input in the said generator of expression, when being judged as said connection, selecting said deviation signal, be judged as when not having said connection, select the 1st switch unit of said equivalent signal; And
The signal that the 1st switch unit is selected is as input, the control unit of the control output signal of the said prime mover output of output control.
19. the control device like each described prime mover output in the claim 14 to 18 is characterized in that,
The filter cell that has some signals of the process till the output that is input to control output signal of tach signal and frequency signal, will decay or remove owing to the inconsistent caused assigned frequency component of said electromotive power output cyclical swing that produces of the output of said prime mover and electromotive power output.
20. the control device like each described prime mover output in the claim 14 to 18 is characterized in that,
Has the phasing unit that the phase place of the some signals that make the process till the output that is input to control output signal of tach signal and frequency signal is leading or lag behind.
21. the control device like each described prime mover output in the claim 14 to 18 is characterized in that having
Had or not the signal that is connected with electric power system as input by the generator of prime mover driven expression; When being judged as said connection; Select the said generator of expression output or said electric power system the frequency currency frequency signal, be judged as when not having said connections, select to represent the 2nd switch unit of tach signal of the rotating speed currency of said prime mover;
As input, output is extracted owing to the go forward side by side change-detection unit of line output of the output of prime mover and the inconsistent caused assigned frequency component of said electromotive power output cyclical swing that produces of electromotive power output from this input signal with the selection signal of the 2nd switch unit;
As input, output makes the phasing unit of the leading or correction signal that lags behind of this phase of input signals with said frequency component; And
The adder unit that signal carries out addition is exported in this correction signal and control.
22. the control device of prime mover output is characterized in that having
The rotating speed deviation of the prime mover that drives generator is carried out differential, calculate because the change of the said electromotive power output that the deviation of the electromotive power output of output of said prime mover and said generator produces, and export the differentiation element of compensating signal;
The electromotive power output signal of currency of this compensating signal and the said electromotive power output of expression is carried out addition, and the adder unit of output prime mover output equivalent signal;
Electromotive power output instruction value signal and the said prime mover output equivalent signal of command value of target that expression is become said electromotive power output is as input, and the said command value of output expression and said prime mover are exported the deviation detecting unit of deviation signal of the deviation of equivalent signal; And
As input, the control unit of signal is exported in the control of the output of the said prime mover of output control with said deviation signal.
23. the control device of prime mover output as claimed in claim 22 is characterized in that,
The filter cell that has from some signals of prime mover output equivalent signal or deviation signal or control output signal, the frequency component of regulation is decayed or removes.
24. the control device of prime mover output as claimed in claim 22 is characterized in that,
The leading phasing unit that perhaps lags behind of phase place with the some signals that make prime mover output equivalent signal or deviation signal or control output signal.
25. the control device of prime mover output as claimed in claim 22 is characterized in that having
Prime mover is exported equivalent signal as input, from this input signal, extract the go forward side by side change-detection unit of line output of assigned frequency component;
As input, output makes the phasing unit of the leading or correction signal that lags behind of this phase of input signals with said frequency component; And
The adder unit that signal carries out addition is exported in said correction signal and control.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2005265061 | 2005-09-13 | ||
| KR2005-265061 | 2005-09-13 | ||
| KR20050265061 | 2005-09-13 |
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| Publication Number | Publication Date |
|---|---|
| CN1933321A CN1933321A (en) | 2007-03-21 |
| CN1933321B true CN1933321B (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610073707 Expired - Fee Related CN1933321B (en) | 2005-09-13 | 2006-03-31 | Control device for motor output |
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| Country | Link |
|---|---|
| CN (1) | CN1933321B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112015009955A2 (en) * | 2012-11-09 | 2017-07-11 | Toyota Motor Co Ltd | alternator and controller control apparatus which periodically transmits instruction signal to regulator controlling the alternator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2326769Y (en) * | 1998-04-16 | 1999-06-30 | 谢蕴章 | Electrohydraulic speed regulator directly connected with oil-distribution valve by control motor |
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- 2006-03-31 CN CN 200610073707 patent/CN1933321B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2326769Y (en) * | 1998-04-16 | 1999-06-30 | 谢蕴章 | Electrohydraulic speed regulator directly connected with oil-distribution valve by control motor |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2002-233195A 2002.08.16 |
| JP特开平10-304571A 1998.11.13 |
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