CN1036559C - Variable speed pumping-up generator - Google Patents
Variable speed pumping-up generator Download PDFInfo
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- CN1036559C CN1036559C CN94119211A CN94119211A CN1036559C CN 1036559 C CN1036559 C CN 1036559C CN 94119211 A CN94119211 A CN 94119211A CN 94119211 A CN94119211 A CN 94119211A CN 1036559 C CN1036559 C CN 1036559C
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Abstract
The present invention relates to a variable speed water pumping energy accumulating type generator which comprises a first speed controller and a second speed controller, wherein the first speed controller is used for controlling a water pump and a water wheel according to power output command and for outputting excitation control signals to an AC excitation device of a generator; the second speed controller is used for controlling AC excitation amount outputted by the AC excitation device when the rotary speed of a rotary shaft offsets from a set value of lower limit or a set value of upper limit in an electricity generation mode, wherein the set value is set according to rotary speed generated in normal operation.
Description
The present invention relates to a kind of pumping-up generator of variable-ratio, it has as the frequency converter of AC excitation device and has the primary circuit that is connected to synchronously on the commercial power electric power system, although the rotor of generator rotates in the variable-ratio mode.The speed of more definite theory, the variable-ratio pumping-up generator that relates to energy control of pump-water wheels pusher side in power generation mode.More particularly, the present invention can the steady and continuous operation under the situation that does not break away from predetermined variable-ratio scope.
Power generation mode for the variable-ratio pumping-up generator that is used for water pump-hydraulic turbine, two kinds of main control system are arranged, and its application depends on that speed control and output control are at water pump-hydraulic turbine or prime mover side or at generator-motor or load-side.
In first kind of control system, speed control is at generator-motor, and output control is at water pump-hydraulic turbine.It is characterized in that:
A. important carry out speed control and the speed control waveform is complete.
B. because the electrical power of generator motor almost is the twice by the mechanical output of water pump-hydraulic turbine output, directly appear on the electrical power of generator-motor in the influence of the water hammer in water pump-hydraulic turbine upstream side and downstream and the anti-trend of putting of instantaneous appearance.
Therefore, the formed adverse effect of commercial power electric power system that is connected is become a problem, thereby this control is unworthy recommending.
Thereby release second kind of control system, in this system, according to the external power command signal, carry out optimum speed control, and carry out power control, so that power is directly followed the tracks of the external power command signal at generator-motor at water pump-hydraulic turbine.It is characterized in that:
A. require very quick and direct power response near the power command signal.
B. owing to carry out speed control, safe in the system that carries out speed control in generator-motor side or load-side in prime mover side.
In this system, though a given fast power variance command signal, because the adverse effect that water hammer produces does not appear at the commercial power electric power system fully.
Yet because speed control depends on the flow velocity control of water pump-hydraulic turbine, low-response makes speed be tending towards responding too slow or makes it to produce to a certain degree toning.
On the other hand, in predetermined velocity interval, be difficult to come into force by strict control rate for the machinery of adjustable speed, because otherwise can make frequency converter lose its function.
In addition, in the pumping-up generator of adjustable speed, often be confined to the lower region of adjustable-speed scope in the operational speed range of the hydraulic turbine pattern of the water pump-hydraulic turbine of adjustable speed or power generation mode, and the operational speed range when the pumped storage pattern covers gamut basically.This is for considering such fact, and promptly the efficient of the hydraulic turbine is being lower than under the rotating speed of synchronous speed higherly, and under the pumped storage pattern, the adjustable extent of input should be big as far as possible.
Therefore, in the pumping-up generator of adjustable speed, under power generation mode, when the rotating speed generation toning of water pump-hydraulic turbine exceeds scheduled volume of lower limit or exceeds scheduled volume of the upper limit, regulate by electrical power output generator one motor of adjustable speed, opening speed control is used to suppress toning, as disclosed in open (kokai) file JP-A-62-071497 of Japan Patent.
Fig. 6 represents this disclosed system of JP-A-62-071497 file.Induction motor 1 drags rotation by the epitrochanterian hydraulic turbine 2 that is directly connected to it, be provided to the secondary winding 1b of induction motor 1 by the AC excitation electric current of the pre-phasing of secondary excitation control device 3 controls according to the rotating speed of induction electric generator 1, secondary excitation control device 3 has frequency converter and carries out the adjustable speed operation, makes to have with the AC power of AC system 4 a same frequencies winding 1a by induction motor 1 to export.The power that is used to control the secondary excitation control device is provided by receiving transformer 12.
Function generator and the outside generating of reception output command P
0With water level detecting signal H, so that produce an optimum speed order Na and a feed-forward signal Ya who is used to improve the guide vane response speed.When SEA LEVEL VARIATION was very little, water level signal H can omit.Revolution speed control device 16 will be compared with optimum speed order Na by the actual speed N that revolution detector 6 detects, with output guide blade aperture control signal Δ Y.Feed-forward signal Ya and guide vane opening control signal Δ Y from function generator 5 utilize adder 21 summations, and will be somebody's turn to do and be input to the stator drive unit 10 of control stator 11.
The structure of explained later generating output calibration command device 25.When rotating speed is in set point N
2And N
3Between the time, generating output calibration command signal Δ P
2Remain zero, when rotational speed N is lower than set point N
2The time, generating output calibration command signal Δ P
2Reduce with the ratio that is lowered into of rotational speed N.On the other hand, be higher than set point N when rotational speed N
3The time, generating output calibration command signal Δ P
2With the proportional rising of the rising of rotational speed N.Generating output calibration command signal Δ P
2The absolute value Be Controlled be no more than P
2Set point N
2And N
3Setting be to carry out according to the voltage rating of the frequency converter of secondary excitation control device 3 and frequency output area and by the determined range of speeds of the performance characteristics of the hydraulic turbine 2.
Slippage phase place S with induction motor output command PG and slippage phase detectors 7
pBe input to secondary excitation control device 3, and control is provided to the AC excitation electric current of secondary winding 1b of induction motor 1, makes the output detection signal P of the induction motor 1 that detects by active power detector 9 equal induction motor output command PG.Or rather, can adopt disclosed control method in open (kokoku) file JP-B-57-60645 of Japan Patent.Stator drive unit 10 control stators 11 be according to feed-forward signal Ya and guide vane opening control signal Δ Y and, so that control hydraulic turbine output PT.
As generating output P
0Step increases so that step is when increasing generating output P shown in Fig. 7 (a), when rotational speed N at time t
0The time at set point N
2When neighbouring, the response when this is described.As generating output P
0As Fig. 7 (a) time t that is shown in
0Step increases, so that step increases when generating electricity output P, the generating output P of induction motor 1 follows generating output command P
0Variation, it increases shown in Fig. 7 (g).On the other hand, the aperture Y of stator 11 in response to Ya and Δ Y and, its adopts mechanical system to carry out, this response is slower than generating output P to generating output command P
0Response.Therefore, hydraulic turbine output PT is lower than generating output P, and at generating output command P
0Rapid variation after, rotational speed N temporarily reduces, after this, at time t
1, generating output P and hydraulic turbine output PT become equal, and the minimum value of a transient state of the feasible record of the reduction of rotational speed N.At time t
1, because velocity deviation Δ N is positive, guide vane opening control signal Δ Y is positive, guide vane opening Y continues to increase.Therefore, hydraulic turbine output PT becomes greater than generating output P, and shown in Fig. 7 (f), rotational speed N begins to rise.When rotational speed N increased, with the deviation reduction of optimum speed order Na, and when guide vane opening control signal Δ Y reduced, the difference between hydraulic turbine output PT and generating output P reduced, the acceleration reduction of rotational speed N.
If at generating output command P
0In the rotational speed N decline process, be reduced to set point N under the rotational speed N after sharply increasing
2, can produce and follow.Under rotational speed N, be reduced to set point N
2The time, the induction motor output command PG that is input to secondary excitation control device 3 is than outside generating output command P
0A little generating output calibration command signal Δ P
2Therefore, become at the output PT of the hydraulic turbine and equal to generate electricity the time t of output P
1Equal to generate electricity output command P early than becoming at hydraulic turbine output PT
0Time t
2And such time point, at this time point, rotational speed N write down as Fig. 9 (f) with intermittent line represent from time t
2To time t
1The transient state minimum change, make the transient state toning of rotational speed N reduce significantly.Therefore, carry out opening speed control, make unlikely being reduced to outside the predetermined set value of rotating speed of hydraulic turbine generator of adjustable speed.As upper limit set value N
3When being exceeded, produce similar phenomena.
Yet prior art is not mentioned wherein and is carried out opening speed control by secondary excitation control device 3, promptly how to set lower limit set value N
2With upper limit set value N
3
In addition, verified, when the operational speed range at power generation mode is limited to lower region in the adjustable-speed scope, and when when the difference between the upper limit of the range of operation of power generation mode and the upper limit in the range of operation of pumped storage pattern is very big, above-mentioned have a technological system and inapplicable.Promptly be lower than the going up in limited time of adjustable-speed scope of the lower limit of adjustable-speed scope of power generation mode and a little higher than pumped storage pattern slightly when the setting of opening speed control, in power generation mode according in the running that is bordering on 100% output, at power command P
0Rapid decline after, rotational speed N immediately significantly moment surpass power generation mode the variable velocity scope go up cloudy.Promptly before rotational speed N reaches its upper limit set value, utilize the control of backwashing not obtain the inhibition effect of toning, and in the adjustable-speed scope, produce velocity shifts significantly.Even the upwards skew of rotational speed N allows, because it still within the adjustable extent of frequency converter or it can be easy to utilize opening speed control and be inhibited at the upper limit place of adjustable-speed scope, if then upwards the offset power order sharply descends, and therefore the rotating speed order also sharply descends, and descends fast with the anti-pendulum while rotating speed that upwards is offset.Resultant toning is lower than the lower limit of adjustable-speed scope.It can step into lower opening speed control range, is increased to a certain degree up to inhibitory action, so that overcome the energy of downward toning.The quantity of stepping into can be big as losing when synchronous.
The objective of the invention is to control a kind of pumping-up generator of adjustable speed, it utilizes water pump-hydraulic turbine to carry out rotating speed control at power generation mode, makes toning not break away from predetermined adjustable speed scope, therefore guarantees the steady and continuous operation.
Above-mentioned purpose is to realize by a kind of like this pumping-up generator of adjustable speed, it comprises an induction generator-motor, this motor has the winding and the secondary winding of the electric power system of being connected to, and AC excitation device, it is excitatory to be used to make described secondary winding to exchange, the rotating shaft of described AC excitation device utilizes the water pump-hydraulic turbine that is connected thereto to make it rotation in power generation mode, then rotates described water pump-hydraulic turbine in the pumped storage pattern, and comprises:
First speed control unit is used in power generation mode output speed command signal, so that control described water pump-hydraulic turbine and to described AC excitation control device output AC excitation control signal according to the power output command; And
The second speed control device is used at power generation mode when being reduced to lower limit set value under the rotating speed of described rotating shaft, and control is from the AC excitation capacity of described AC excitation device;
Will the lower limit set value of the rated speed adjustable extent of described rotating shaft and the difference between the lower limit set greater than the amplitude at the peak-peak of the velocity fluctuation that can bear at least half, for example say, 0.15% of normal speed, it is corresponding to not having slippage or zero excitation frequency, the speed oscillation of bearing in this case, is estimated.
Above-mentioned purpose realizes it being also by utilizing a kind of like this pumping-up generator of adjustable speed, it comprises an induction generator-motor, this motor has winding and the secondary winding in the electric power system of being connected to, also has the AC excitation device, it is used to make described secondary winding AC excitation, drag rotation in induction generator-shaft of motor described in the power generation mode by the water pump-hydraulic turbine that is connected thereto, in the pumped storage pattern, then rotate described water pump-hydraulic turbine, also comprise:
First speed control unit is used at power generation mode, the output speed command signal, so that control described water pump-hydraulic turbine according to the power output command, and to described AC excitation control device output AC excitation control signal, and
The second speed control device, the rotating speed that is used under power generation mode when described rotating shaft rises when surpassing the initial set point of the upper limit, and control is from the AC excitation capacity of described AC excitation device;
This initial upper limit set value be higher than the normal adjustable-speed scope in power generation mode maximum and less than the upper limit of the normal adjustable-speed scope in the pumped storage pattern.
Above-mentioned purpose of the present invention can also realize it being by optionally utilizing above-mentioned two kinds of control system, so that be controlled at the device in the power generation mode in the pumping-up generator of adjustable speed.
In the pumping-up generator of adjustable speed of the present invention, under power generation mode, the speed control order is provided on water pump-hydraulic turbine as prime mover, to carry out normal speed control, and, utilize first speed control unit according to running status, under power generation mode with adjustable mode setting speed control command.When under power generation mode, when the instantaneous variation of output command makes the rotating speed of water pump-hydraulic turbine drop to pre-determined amount under the normal operation adjustable-speed scope, the output of second speed control device action control AC excitation device, the control rotating speed so that backwash, therefore the capacity according to described AC excitation device has prevented the predetermined scope of offspeed.In this case, utilize opening speed control command device, set initial lower limit set value, the speed control of backwashing under this set point begins effect a little, this set point is lower than the minimum value of normal operation adjustable-speed scope, make the difference of this set point of the normal range of operation under power generation mode and minimum value greater than half of the amplitude at the peak-peak of the velocity fluctuation that can bear, this vibration be produce continuously in this this back or after this this, have backwashing of opening speed control in normal operation conditions and take place and estimate to produce.Therefore, when the variation of generating output command is very little, non-operating state is kept in opening speed control, for characteristic effect owing to normal speed control, only velocity fluctuation that will bear that is produced continuously by the hydraulic turbine or velocity fluctuation are kept as the trace of transient process, the control of this opening speed is no longer worked, and makes that opening speed control is formed direct disturbance from the electrical power output of generator has been avoided.
In addition, in the pumping-up generator of adjustable speed of the present invention, under power generation mode, the speed control order is applied on the water pump-hydraulic turbine of prime mover of controlling as the implementation normal speed, and the speed control order under power generation mode utilizes speed control unit, set with adjustable way according to running status, set to such an extent that be lower than the maximum of the normal running speed scope under the pumped storage pattern in the maximum of the normal running speed scope under the power generation mode.In addition, set to such an extent that be higher than the maximum of the normal running speed scope under the power generation mode for the initial upper limit set value of opening speed control, and less than the maximum of the normal running speed scope under the pumped storage pattern.By the initial upper limit set value of opening speed control being set near the maximum of normal running speed scope, the temporary transient toning width of rotating speed can suppress lowly to desired value.
Fig. 1 represents that the integral body of an embodiment of the pumping-up generator of variable-ratio of the present invention constitutes,
Fig. 2 represents the normal range of operation in the embodiments of the invention,
Fig. 3 illustrates the work of a part of embodiments of the invention,
Fig. 4 illustrates the upper limit control in the embodiments of the invention,
Fig. 5 illustrates the upper limit control in the embodiments of the invention,
Fig. 6 represents that the integral body of prior art of the pumping-up generator of variable-ratio constitutes,
Fig. 7 explanation lower limit control in the prior art,
Fig. 8 explanation in the prior art lower limit control and
Fig. 9 explanation lower limit control in an embodiment of the present invention.
Explain one embodiment of the present of invention below by consulting accompanying drawing.Fig. 1 represents one embodiment of the present of invention, wherein with Fig. 6 in the identical or corresponding parts of employed those identical numbers mark.Explain parts different with Fig. 6 in Fig. 1 now.Digital 25A is corresponding to the generating output calibration command device 25 among Fig. 6.When rotational speed N was between set point Nklg and the Nkug, output signal remained zero, and dropped on set point Nklg when following, the ratio that the is lowered into reduction of output signal and rotational speed N when rotational speed N.On the other hand, when rotational speed N rose above set point Nkug, proportional rising of the rising of output signal and rotational speed N and opening speed control operation were started.Set point Nklg and Nkug determine as follows.
The lower limit of supposing optimum speed order Na in power generation mode is Nalg, and its upper limit is Naug, the adjustable-speed range of operation of promptly utilizing normal pump turbine speed control in power generation mode is Nalg-Naug (a normal range of operation), and they are set and will satisfy:
Nklg＜Nalg, Nkug＞Naug promptly, they are set in outside the normal adjustable-speed range of operation.In addition, (Nalg-Nklg) set single amplitude greater than issuable continuous rotation fluctuation in stable state.This is that the hydraulic turbine is exported control and disturbance velocity control because the opening speed of considering can carry out by the secondary excitation control device is controlled and is provided with, even optimum speed order Nag is in lower limit and the operation of realization stable continuous.
Fig. 3 represents the embodiment of a transient characterisitics control device 25B, and this device is through the response and the stability of secondary excitation control device may command opening speed control device.Fig. 1 represents main delay device (shown in Fig. 3 (a) and Fig. 3 (b)), although it can be substituted by the PI arithmetic unit shown in Fig. 3 (c), wherein S represents a Laplce (Laplace) operator.Adder of digital 26 marks, it is with output Δ PI and the outside generating output command FO addition that applies of transient characterisitics control device 25B, to produce induction motor output command PG.
In control device of the present invention, when rotational speed N is near the following set point Nalg of normal range of operation, for step increases generating output P, as Fig. 9 (a) time t that is shown in
0Step increases the generating output command, and response is at this moment described.As generating output command P
0At time t
0During increase, opposite with the variation of the optimum speed order Na that produces in Fig. 8, rotational speed N temporarily descends, shown in Fig. 9 (f).When rotational speed N becomes when being lower than the lower limit set value Nklg of opening speed control, because the effect of generating output calibration command signal Δ PI, the induction motor output command that is input to secondary excitation control device 3 becomes less than outside generating output command P
0Therefore, time t
1Early than time t
2, at time t
1, hydraulic turbine output PT is corresponding to generating output, and time t
2, hydraulic turbine output PT is corresponding to generating output command P
0Therefore, according to the present invention, at time t
2To time t
1Time phase in rotational speed N skew minimum, shown in the dotted line among Fig. 9 (f).In addition, the transient state toning of backwashing also can significantly reduce.
According to the present invention, because predetermined difference is given between the lower limit set value Nklg of the lower limit Nalg of the normal range of operation that fixes on optimum speed order Na and opening speed control, as generating output command P
0Variation when very little, opening speed control is not effective.In addition, when utilizing the hydraulic turbine to carry out speed control, some continuous rotational oscillation can take place inevitably, even under stable state, this is owing to have inert zone and can not turnover zone in revolution speed control device 16, hysteresis in the output characteristic of the hydraulic turbine itself and operating lag.In the present invention, as mentioned above, will set greater than half of the peak-peak amplitude of rotational oscillation continuously in the difference (aG is in Fig. 2) between the lower limit Nklg of the lower limit Nalg of the normal range of operation of optimum speed order Na and opening speed control.And,, make opening speed control invalid in stable state.
Consult Fig. 2, explain the upper limit control of running status.In the pumping-up generator of adjustable speed, the adjustable extent of setting rotating speed is a common operation, and promptly normal range of operation size is that the scope that is allowed by frequency converter determines.Therefore the adjustable extent of input is big as much as possible.In Fig. 2, in the pumped storage pattern, the lower limit Nalp of normal range of operation arrives upper limit Naup corresponding to this scope.On the other hand, in power generation mode, general normal range of operation is narrow as shown in Figure 2, is lower than the rotating speed in the pumped storage pattern because can guarantee the rotating speed of maximal efficiency.Particularly, under many circumstances, the adjustable speed upper limit of normal range of operation is lower than the upper limit Naup in the pumped storage pattern.
Therefore, the problem that the next one will solve is that the upper limit set value of controlling through the opening speed of secondary excitation control device 3 is set, and particularly will be set in the upper limit set value Nkug in the power generation mode.In the present invention, it will be set to such an extent that be lower than Naup and be higher than Naug, as shown in Figure 2.In addition, its setting will make with the upper limit Naug difference β G of normal range of operation in power generation mode not too big.In the pumped storage pattern, it never wants the upper limit set value Nkup of shared opening speed control.
Consult Fig. 4 and Fig. 5, the operation of explained later device of the present invention.
In Fig. 5, β G is too big.As generating output command P
0When sharply descending as shown in the figure, rotational speed N temporarily rises shown in Fig. 5 (f), and this is because PT is exported in the response of generating output P faster than the hydraulic turbine response (would rather it set comparatively fast, so that make the device display characteristic of adjustable speed).The very big and decline suddenly of its back pendulum then.The previous temporary transient amplitude that rises was big more, after to accommodate the intensity of falling just big more.Therefore, be reduced to the lower limit Nalg of normal range of operation and further be tending towards being reduced to down the lower limit set value Nkl-g of opening speed control under the rotational speed N.When it reaches lower limit set value Nklg, provide braking by secondary excitation control device 3, opening speed control comes into effect, and can't stop immediately but rotate, but continuity runs to a certain degree.The value of continuity running and generating output command P
0Decline begin after the width that temporarily rises at once of rotating speed relevant.If the latter allows big numerical value, the former is also big.In other words, as rotating speed order P after toning
0When sharply descending immediately, rotating speed order P
0Overlapping all too big with pendulum after the toning with the continuity running.When the continuity running becomes too big, break away from range of operation and its dysfunction of secondary excitation control device 3.
In this manner, the upper limit set value Nkug of toning in the lower limit of adjustable speed scope and opening speed control is closely related, and this toning one is plunderred and mistake, as being provided with contact.Therefore, as shown in Figure 4, in power generation mode, at the setting of the set point Nkug of the opening speed control at the upper limit place of normal range of operation upper limit Naug, so that suppress the temporary transient rising of rotational speed N round normal range of operation.
Just As indicated above, when when the difference between the upper limit Naug of the upper limit Naup of the normal range of operation under the pumped storage pattern and the normal range of operation under power generation mode is big, the upper limit set value Nkug of the speed control of backwashing under power generation mode is also incorrect with the shared value of upper limit set value Nkup of opening speed control under the pumped storage pattern.
At the lower limit end, as shown in Figure 2, the lower limit set value Nklg of the control of the opening speed under power generation mode can be set the lower limit set value Nklp of the opening speed control that equals under the pumped storage pattern.
According to the present invention, under power generation mode, carry out opening speed control, the setting of lower limit set value is that the rotational oscillation that basis produces in the running under the power generation mode continuously carries out, and it is that consideration is turned round with the continuity that the anti-pendulum of rotating speed toning is accompanied mutually that the best of upper limit set value is set.Therefore, realize the steady and continuous operation, can not break away from predetermined adjustable velocity interval.
Opening speed control can easily join as the part of the software of control.
Claims (7)
1. the pumping-up generator of a variable-ratio comprises induction generator one motor, and this motor comprises:
Stator with winding of the electric power system of being connected to;
Rotor with the secondary winding that is connected to water pump one hydraulic turbine, this pump turbine have guide vane and regulate the device of described guide vane;
An AC excitation device is used to regulate the frequency excitation of described secondary winding;
Described rotor has a rotating shaft, and under power generation mode, it is driven by described pump turbine, and under the pumped storage pattern, it drives described pump turbine,
Described variable-ratio pumping-up generator comprises:
First speed control unit receives predetermined external power command signal under power generation mode, according to described external power command signal, by the described guide vane apparatus of regulating described pump turbine optimum value is arrived in the speed regulation of described pump turbine;
The second speed control device, it is when by the described AC excitation device of control, but the speed of determining described pump turbine was moved when exceeding a predetermined range of operation;
It is characterized in that, described first speed control unit and described second speed control device are set, make the speed limit set point of the reduction of the described operation that causes described second speed control device be set to less than the minimum set point of described first speed control unit, its difference is greater than the single amplitude of the speed at continuous rating concussion that obtains under the control of described first speed control unit.
2. the pumping-up generator of variable-ratio as claimed in claim 1, it is characterized in that, described second speed control device is under power generation mode, when the rotating speed of described rotating shaft rises above upper limit set value, control is from the excitatory amount of the interchange of described AC excitation device, and this upper limit set value is higher than the normal range of operation higher limit under power generation mode and is lower than the higher limit of the normal range of operation under the pumped storage pattern.
3. the pumping-up generator of variable-ratio as claimed in claim 1 is characterized in that, under the pumped storage pattern, described first speed control unit output speed control command or the power control command is used to control described AC excitation device.
4. the pumping-up generator of variable-ratio as claimed in claim 1 is characterized in that, the lower limit set of rated speed that will be under power generation mode must be higher than the lower limit of the rated speed under the pumped storage pattern.
5. the pumping-up generator of variable-ratio as claimed in claim 1 is characterized in that, in normal course of operation, the single amplitude of speed oscillation can the rotating shaft rotating speed 0.15% in.
6. the generator of the pumped storage formula of variable-ratio as claimed in claim 1 is characterized in that, it is closer to each other that the described upper limit set value of the rated speed of described rotating shaft and higher limit are set.
7. the pumping-up generator of variable-ratio as claimed in claim 6, it is characterized in that, described second speed control device, under power generation mode, when being reduced to lower limit set value under the rotating speed of described rotating shaft, control is from the AC excitation amount of described AC excitation device, and will set greater than half of the amplitude of the peak-to-peak value of the speed oscillation that produces in normal course of operation in the lower limit set value of the rated speed of described rotating shaft and the difference between the lower limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94119211A CN1036559C (en) | 1994-12-23 | 1994-12-23 | Variable speed pumping-up generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94119211A CN1036559C (en) | 1994-12-23 | 1994-12-23 | Variable speed pumping-up generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1120265A CN1120265A (en) | 1996-04-10 |
| CN1036559C true CN1036559C (en) | 1997-11-26 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94119211A Expired - Fee Related CN1036559C (en) | 1994-12-23 | 1994-12-23 | Variable speed pumping-up generator |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6220241B2 (en) * | 2013-01-11 | 2017-10-25 | 株式会社東芝 | Control device and control method for variable speed pumped storage power generation system |
| CN104612891B (en) * | 2014-11-27 | 2017-04-26 | 国家电网公司 | Emergent switchover starting control method from water pumping to power generation of pump storage group |
| CN105975716B (en) * | 2016-05-24 | 2019-04-05 | 哈尔滨理工大学 | A kind of design method of double speed regulation mechanism speed change pump storage machines |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5012177A (en) * | 1989-12-19 | 1991-04-30 | Sundstrand Corporation | Power conversion system using a switched reluctance motor/generator |
| US5015941A (en) * | 1989-10-30 | 1991-05-14 | Sundstrand Corporation | Power conversion system with bi-directional power converter having prime mover start capability |
| US5097195A (en) * | 1989-11-27 | 1992-03-17 | Sundstrand Corporation | AC exciter for VSCF starter/generator |
-
1994
- 1994-12-23 CN CN94119211A patent/CN1036559C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5015941A (en) * | 1989-10-30 | 1991-05-14 | Sundstrand Corporation | Power conversion system with bi-directional power converter having prime mover start capability |
| US5097195A (en) * | 1989-11-27 | 1992-03-17 | Sundstrand Corporation | AC exciter for VSCF starter/generator |
| US5012177A (en) * | 1989-12-19 | 1991-04-30 | Sundstrand Corporation | Power conversion system using a switched reluctance motor/generator |
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| Publication number | Publication date |
|---|---|
| CN1120265A (en) | 1996-04-10 |
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