JP3515275B2 - Variable speed generator motor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable speed generator-motor apparatus which excites the secondary side of a wire wound induction machine with an alternating current and connects the primary side to a system.

[0002]

2. Description of the Related Art A conventional pumped-storage power plant uses a synchronous machine as a generator motor. Therefore, during the power generation operation, the guide vane opening is also determined if the required active power and the head are determined, but the constant rotation speed based on the synchronous speed is not always efficient for the pump turbine. Also, during pumping operation,
If the pump head is decided, the input becomes constant and there is a problem that the active power cannot be adjusted.

A variable speed pumped storage power generation system uses a wire wound induction machine as a generator motor, detects a phase and a rotation speed of a rotor, and excites a secondary side of the wire wound induction machine with a low-frequency alternating current. By controlling the output of the converter, it is a system that can always synchronize the primary side with the system even if the rotor of the wire wound induction machine is not at the synchronous speed.

In the present system, the relationship between active power, guide vane opening, and rotation speed can be manipulated so that the pump turbine always operates with high efficiency during power generation operation. Further, during the pumping operation, the active power changes with the cube of the rotation speed, so the active power can be adjusted by changing the rotation speed. Furthermore, by transforming the three-phase AC into a rectangular coordinate system, the torque component (active power, component related to rotation speed) and excitation component (reactive power, reactive power, It has the feature that it can control independently the component related to voltage).

FIG. 19 is a configuration diagram of a conventional variable speed generator-motor apparatus used in the variable speed pumped storage power generation system described above.

The generator motor 1 comprises a stator winding 1a which is a primary winding and a rotor winding 1b which is a secondary winding. The stator winding 1a passes from a main circuit 2 through a circuit breaker 3. While connected to the system 4, the rotor winding 1b is connected to the pump turbine 5. The primary side of the frequency converter 6 is connected to the main circuit 2, the secondary side of the frequency converter 6 is connected to the rotor winding 1b, and the speed slip detector 7 is connected to the rotor winding 1b. .

In the variable speed generator / motor 10, first, Δf
The detection unit 11 calculates the deviation between the frequency f of the system 4 and the reference frequency fs based on the voltage of the system 4, and outputs the obtained frequency fluctuation signal Δf to the governor-free compensation calculation unit 12.

Next, the governor-free compensation calculation means 12
As shown in FIG. 22, the adjustment rate 12a and each function 12b-12
e is set, a predetermined calculation is performed based on the frequency fluctuation signal Δf to obtain a compensation signal that makes the frequency fluctuation signal Δf zero, and an active power compensation signal, a rotation speed compensation signal,
A torque component current compensation signal and a guide vane opening compensation signal are generated respectively. Then, the active power compensation signal from the governor-free compensation calculation means 12 is input to the addition means 13, and the active power command signal Pa obtained by adding to the active power target signal P by the addition means 13 is used as a high efficiency function / active power. Input to the control means 14.

In the high efficiency function / active power control means 14,
A rotation speed target signal and a guide vane opening target signal are calculated from the active power command signal Pa and the drop signal H. The rotation speed target signal is the rotation speed command signal Na obtained by adding the rotation speed compensation signal and the addition means 15, and the actual rotation speed signal Nr or the slip signal S detected by the speed slip detector 7 is shown by the addition means 16. The deviation signal obtained by adding the sign is the velocity slip control means 1
Input to 7.

By the way, the slip signal S is obtained by the following equation.

S = (f1-fr) / f1 Where f1: grid frequency fr: Actual rotation frequency

In the speed slip control means 17, the addition means 1
The torque component current target signal is output so that the deviation signal from 6 becomes zero, that is, the actual rotation speed signal Nr or the slip S follows the rotation speed command signal Na. Next, the torque component current target signal and the torque component current compensation signal from the governor-free compensation calculation means 12 are added together by the addition means 18
Torque component current command signal ig obtained by adding
a is output to the current control unit 19. Then, the current control means 19 controls the frequency converter 6 according to the torque component current command signal iga to increase / decrease the torque component current of the AC excitation supplied to the rotor winding 1b.

On the other hand, high efficiency function / active power control means 14
The guide vane opening command signal GVa obtained by adding the guide vane opening target signal from the guide vane opening compensation signal and the guide vane opening compensation signal by the adding means 20 is the guide vane control means 21.
The guide vane control means 21 controls the opening and closing of the guide vanes 8.

With the above structure, the active power can be controlled as the target value as the variable speed system, and the active power can be output in the direction to suppress the frequency fluctuation of the system while always maintaining a highly efficient state for the pump turbine. .

[0015]

By the way, in the conventional variable speed generator-motor apparatus 10 shown in FIG. 19, when the system is operating near the boundary of the operable range of the system, the governor-free compensation calculation means 12 causes the effective power. ,Rotational speed,
If the torque component current and the guide vane opening are corrected, there is a possibility that the system may deviate from the operable range.
Examples of this range include a limit of the actual rotation speed signal Nr or the slip S (variable speed range: an operating range determined by the ability of the frequency converter) and a limit of active power (an operating range determined by the characteristics of the pump turbine).

For example, in the case of active power, as shown in FIG. 20, it becomes a function of the active power signal P with respect to the head signal H during power generation, and when the head signal H1 is active power P2 to P1 is the operating range. Further, at the time of pumping, as shown in FIG. 21, the active power signal P becomes a function of the head H and the rotation speed Nr. For example, when the variable speed range from the rotation speed N1 to the rotation speed N2 is set, The operating range is up to active power P3. The actual rotation speed signal Nr is generally considered to be about ± 5% of the synchronous speed Ns.

If the actual rotation speed signal Nr deviates from the operable range, the output voltage of the frequency converter 6 cannot overcome the voltage induced on the secondary side of the generator motor 1 and a stable current is supplied. It cannot be poured into the system, and the active power and the rotation speed of the system fluctuate greatly and become unstable. Further, if the effective power is out of the operable range, the system may be damaged due to excessive vibration of the pump turbine or damage to the turbine surface due to cavitation.

Therefore, according to the present invention, even if the active power, the rotational speed, the torque component current, and the guide vane opening are compensated by the governor-free compensation calculation means, the system can be operated stably without departing from the operable range. An object is to provide a variable speed generator-motor device.

[0019]

According to a first aspect of the present invention, a primary winding is connected to a power system and a secondary winding is AC-excited, and a rotary shaft of the linear induction generator motor. In a variable-speed generator-motor device composed of a prime mover / load coupled to a power source, a slip detecting means for detecting a slip of AC excitation based on a frequency of a power system and an actual rotation speed of a rotating shaft, and an active power command or a compensation signal. The function generating means for calculating and outputting the slip command and the guide vane command based on the active power command and the head corrected by, and for making the primary side frequency of the wire wound induction generator motor closer to the reference frequency based on the frequency fluctuation signal of the power system. Compensation signal is calculated and output, and frequency fluctuation signal is shifted to zero signal by limiting at a predetermined rate of change, while predetermined change occurs when slip enters inside from the variable speed operation limit range. In it is shifted from the restricted to the zero signal to a frequency variation signal, a compensation calculating means for the compensation signal computing output to prevent a departure from the variable speed drive limits the slip,
A slip control means for calculating and outputting a torque current command based on a slip command and a slip or slip command, a correction signal and slip, and an AC excitation control means for controlling AC excitation based on a torque current command or a torque current command and a compensation signal, It has a guide vane command or guide vane control means for controlling the guide vane based on the guide vane command and the compensation signal.

According to a second aspect of the present invention, a primary winding is connected to a power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor device composed of a load, slip detection means for detecting slip of AC excitation based on the frequency of the power system and the actual rotation speed of the rotating shaft, and active power corrected by the active power command or compensation signal. Function generating means for calculating and outputting a slip command and a guide vane command based on the command and the head, and a compensating signal for calculating the primary frequency of the wire wound induction generator motor close to the reference frequency based on the frequency fluctuation signal of the power system. On the other hand, inside the variable speed operation limit range of slip, an inner boundary range is further provided, and the gain signal is output as zero when the slip reaches the variable speed operation limit range. When the slip is between the variable speed operation limit range and the inner boundary range, the gain signal is increased and output as going inward, and the gain signal is output as 1 when the slip is within the inner boundary range. Compensation for calculating and outputting a compensation signal for preventing deviation of the slip from the variable speed operation limit range, comprising gain calculation means and multiplication means for using a signal obtained by multiplying the frequency fluctuation signal by the gain signal as a compensation signal A calculation means, a slip control means for calculating and outputting a torque current command based on a slip command, a slip or slip command, a correction signal and a slip, and an AC excitation for controlling AC excitation based on a torque current command or a torque current command and a compensation signal. And a guide vane control means for controlling the guide vane based on the guide vane command or the guide vane command and the compensation signal. The features.

According to a third aspect of the present invention, a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor device composed of a load, slip detection means for detecting slip of AC excitation based on the frequency of the power system and the actual rotation speed of the rotating shaft, and active power corrected by the active power command or compensation signal. Function generating means for calculating and outputting a slip command and a guide vane command based on the command and the head, and a compensating signal for calculating the primary frequency of the wire wound induction generator motor close to the reference frequency based on the frequency fluctuation signal of the power system. On the other hand, when the slip reaches the variable speed operation limit range, the upper limit and the lower limit are set to the specified values when the slip reaches the variable speed operation limit range. The setting means for setting the upper limit or the lower limit of the corresponding side to zero, and when the frequency fluctuation signal is within the range between the upper limit and the lower limit, the frequency fluctuation signal is output as the compensation signal, while the frequency fluctuation signal is the upper limit. Compensation calculation that outputs a compensation signal that prevents deviation of the slip from the variable speed operation limit range by providing a limiter that is limited to the upper limit limit or the lower limit limit and outputs as a compensation signal when it is outside the range Means, a slip control means for calculating and outputting a torque current command based on a slip command, a slip or slip command, a correction signal and a slip, and an AC excitation control for controlling AC excitation based on a torque current command or a torque current command and a compensation signal And the guide vanes based on the guide vane command or the guide vane command and the compensation signal. And having a guide vane control means.

According to a fourth aspect of the present invention, a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover / motor connected to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor device composed of a load, slip detection means for detecting slip of AC excitation based on the frequency of the power system and the actual rotation speed of the rotating shaft, and active power corrected by the active power command or compensation signal. Function generating means for calculating and outputting a slip command and a guide vane command based on the command and the head, and a compensating signal for calculating the primary frequency of the wire wound induction generator motor close to the reference frequency based on the frequency fluctuation signal of the power system. On the other hand, when the slip reaches the variable speed operation limit range, the means for outputting the upper limit hold signal or the lower limit hold signal on the corresponding side and the upper limit hold signal are input. Then, a limiter is provided to limit the Δf signal to be equal to or less than the upper limit value to be a compensation signal, and to input a lower limit hold signal to limit the Δf signal to be equal to or more than the lower limit value to be a compensation signal. hand,
Compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the slip from the variable speed operation limit range, and slip control means for calculating and outputting a torque current command based on a slip command and a slip or a slip command and a correction signal and slip. An alternating current excitation control means for controlling alternating current excitation based on a torque current command or a torque current command and a compensation signal, and a guide vane command or guide vane control means controlling a guide vane based on the guide vane command and a compensation signal Is characterized by.

According to a fifth aspect of the present invention, a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable-speed generator-motor device composed of a load, in order to bring the primary side frequency of the wound-rotor induction generator motor closer to the reference frequency based on the speed detection means for detecting the actual rotation speed of the rotating shaft and the frequency fluctuation signal of the power system. On the other hand, when the actual rotation speed signal reaches a predetermined variable speed operation limit range while outputting the compensation signal of, the frequency fluctuation signal is shifted to the zero signal by limiting at a predetermined change rate, while the actual rotation speed signal is output. When the vehicle enters inside the variable speed operation limit range, it is limited by a predetermined rate of change and is shifted from the zero signal to the frequency fluctuation signal, and a compensation signal that prevents deviation of the actual rotation speed from the variable speed operation limit range is played. A compensation calculation means for outputting, a function generation means for calculating and outputting a speed command and a guide vane command based on the active power command and the head or based on the active power command and the head corrected by the compensation signal, the speed command and the compensation signal. And a speed control means for calculating and outputting a torque current command based on the actual rotation speed or based on the speed command and the actual rotation speed,
AC excitation control means for controlling AC excitation based on the torque current command or based on the torque current command and the compensation signal, and guide vane control means for controlling the guide vanes based on the guide vane command or based on the guide vane command and the compensation signal. It is characterized by having.

According to a sixth aspect of the present invention, a primary winding is connected to a power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable-speed generator-motor device composed of a load, in order to bring the primary side frequency of the wound-rotor induction generator motor closer to the reference frequency based on the speed detection means for detecting the actual rotation speed of the rotating shaft and the frequency fluctuation signal of the power system. While calculating and outputting the compensation signal of, while further inside the variable speed operation limit range, an inner boundary range is provided to output the gain signal as zero when the actual rotation speed signal reaches the variable speed operation limit range, When the actual rotation speed signal is between the variable speed operation limit range and the inner boundary range, the gain signal is increased and output as it goes inward. A variable gain calculating means for outputting the output signal as 1 and a multiplying means for using a signal obtained by multiplying the frequency fluctuation signal by the gain signal as a compensation signal to prevent deviation of the actual rotation speed from the variable speed operation limit range. Compensation calculation means for calculating and outputting a compensation signal for blocking, and function generation means for calculating and outputting a speed command and a guide vane command based on the active power command and the head or based on the active power command and the head corrected by the compensation signal. , A speed control means for calculating and outputting a torque current command based on the speed command, the compensation signal, and the actual rotation speed or based on the speed command and the actual rotation speed, and an alternating current based on the torque current command or based on the torque current command and the compensation signal AC excitation control means for controlling the excitation and a guide vane for controlling the guide vanes based on the guide vane command or based on the guide vane command and the compensation signal. And having a down control unit.

According to a seventh aspect of the present invention, a primary winding is connected to a power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable-speed generator-motor device composed of a load, in order to bring the primary side frequency of the wound-rotor induction generator motor closer to the reference frequency based on the speed detection means for detecting the actual rotation speed of the rotating shaft and the frequency fluctuation signal of the power system. When the actual rotation speed signal is within the variable speed operation limit range, the upper limit and the lower limit are set to predetermined values, respectively, and when the actual rotation speed signal reaches the variable speed operation limit range, Setting means for setting the upper limit or lower limit of the corresponding side to zero, and the frequency fluctuation signal when the frequency fluctuation signal is within the range between the upper limit and lower limit On the other hand, when the frequency fluctuation signal is out of the range between the upper limit and the lower limit, a limiter that limits the upper limit or the lower limit and outputs as a compensation signal is provided. Compensation calculation means for calculating and outputting a compensation signal for preventing deviation from the above, and a function for calculating and outputting a speed command and a guide vane command based on the active power command and the head or based on the active power command and the head corrected by the compensation signal. Generating means, speed control means for calculating and outputting a torque current command based on the speed command, the compensation signal, and the actual rotation speed, or based on the speed command and the actual rotation speed, and based on the torque current command or the torque current command and the compensation signal AC excitation control means for controlling the AC excitation based on the guide vane command or the guide vane command and the compensation signal. And having a guide vane control means for controlling the Doben.

According to an eighth aspect of the present invention, a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a winding type induction generator motor, and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable-speed generator-motor device composed of a load, in order to bring the primary side frequency of the wound-rotor induction generator motor closer to the reference frequency based on the speed detection means for detecting the actual rotation speed of the rotating shaft and the frequency fluctuation signal of the power system. While calculating and outputting the compensation signal of, the means for outputting the upper limit hold signal or the lower limit hold signal of the corresponding side when the actual rotation speed signal reaches the variable speed operation limit range, and the Δf signal becomes the upper limit when the upper limit hold signal is input. When the lower limit hold signal is input, the Δf signal is limited so that it is greater than or equal to the lower limit value, and the compensation signal is obtained. And a limiter, which calculates and outputs a compensation signal for preventing deviation of the actual rotation speed from the variable speed operation limit range, and an active power command based on the active power command and the head or corrected by the compensation signal. A function generating means for calculating and outputting a speed command and a guide vane command based on the speed difference and a head, and a speed for calculating and outputting a torque current command based on the speed command, the compensation signal and the actual rotation speed or based on the speed command and the actual rotation speed Control means, AC excitation control means for controlling AC excitation based on a torque current command or based on a torque current command and a compensation signal, and guide vanes controlling guide vanes based on a guide vane command or based on a guide vane command and a compensation signal And a control means.

According to a ninth aspect of the present invention, a primary winding is connected to a power system, and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor device composed of a load, slip detection means for detecting slip of AC excitation based on the frequency of the power system and the actual rotation speed of the rotating shaft, and active power corrected by the active power command or compensation signal. Function generator that calculates and outputs the slip command and the guide vane command based on the command and the drop, and the compensation signal that calculates the primary frequency of the wire wound induction generator motor close to the reference frequency based on the frequency fluctuation signal of the power system. , The frequency fluctuation signal is shifted to the zero signal by limiting it at a predetermined rate of change, and when the slip is inward from the variable speed operation limit range, it is limited by a predetermined rate of change and zero signal is received. It was allowed to migrate to the frequency variation signal,
Computation output that outputs a compensation signal that prevents deviation of the slip from the variable speed operation limit range, or output a compensation signal that brings the primary side frequency of the wire wound induction generator motor closer to the reference frequency based on the frequency fluctuation signal of the power system On the other hand, when the active power supplied to the power system instead of the slip reaches the variable speed operation limit range, the compensation operation means for calculating and outputting a compensation signal for preventing the active power from deviating from the variable speed operation limit range. And a slip control means for calculating and outputting a torque current command based on a slip command, a slip or slip command, a correction signal and a slip, and an AC excitation control means for controlling AC excitation based on the torque current command or the torque current command and a compensation signal. And a guide vane control means for controlling the guide vane based on the guide vane command or the guide vane command and the compensation signal. And it features.

According to a tenth aspect of the present invention, a primary winding is connected to a power system and a secondary winding is AC-excited, and a winding type induction generator motor, and a prime mover / motor connected to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor device composed of a load, speed detection means for detecting the actual rotation speed of the rotating shaft,
While outputting a compensation signal to bring the primary side frequency of the wound induction generator motor closer to the reference frequency based on the frequency fluctuation signal of the power system, when the actual rotation speed signal reaches the predetermined variable speed operation limit range, While changing the frequency fluctuation signal to the zero signal by limiting it at a predetermined rate of change, when the actual rotation speed signal goes inward from the variable speed operation limit range, limiting it by a predetermined rate of change from the zero signal to the frequency fluctuation signal Or when the active power signal reaches the predetermined variable speed operation limit range, the frequency fluctuation signal is transferred to the zero signal by limiting at a predetermined change rate, while the active power signal changes from the variable speed operation limit range. When entering the inside, it is limited by a predetermined rate of change and is shifted from a zero signal to a frequency fluctuation signal, and a compensation signal that outputs a compensation signal that prevents deviation of the actual rotation speed from the variable speed operation limit range is calculated and output. Calculating means, function generating means for calculating and outputting a speed command and a guide vane command based on the active power command and the head, or based on the active power command and the head corrected by the compensation signal, the speed command, the compensation signal, and the actual rotation. Speed control means for calculating and outputting a torque current command based on the speed or based on the speed command and the actual rotation speed; and AC excitation control means for controlling the AC excitation based on the torque current command or based on the torque current command and the compensation signal. And a guide vane control means for controlling the guide vane based on the guide vane command or based on the guide vane command and the compensation signal.

According to the eleventh aspect of the present invention, the compensation calculation means limits the frequency fluctuation signal to a zero signal while limiting at a predetermined rate of change when the active power signal reaches a predetermined variable speed operation limit range. When the active power signal goes inward from the variable speed operation limit range, the active power signal is limited at a predetermined rate of change to shift from the zero signal to the frequency fluctuation signal.

According to a twelfth aspect of the present invention, the compensation calculation means further comprises an inner boundary range inside the variable speed operation limit range, and the gain signal is set to zero when the active power signal reaches the variable speed operation limit range. While outputting as a signal, when the active power signal is between the variable speed operation limit range and the inner boundary range, the gain signal is increased and output as going inward,
A variable gain calculation means for outputting a gain signal as 1 when the active power signal enters the inner boundary range and a multiplication means for providing a signal obtained by multiplying the frequency fluctuation signal by the gain signal as a compensation signal are provided. And

According to the thirteenth aspect of the present invention, the compensation calculation means sets the upper limit and the lower limit to predetermined values when the active power signal is within the variable speed operation limit range, respectively.
Setting means for setting the upper limit or the lower limit of the corresponding side to a zero signal when the active power signal reaches the variable speed operation limit range, and the frequency fluctuation signal when the frequency fluctuation signal is within the upper limit and lower limit limits. Is output as a compensation signal, and a limiter is provided which is output as a compensation signal while being limited to the upper limit or the lower limit when the frequency fluctuation signal is outside the range between the upper limit and the lower limit.

In the fourteenth aspect of the present invention, the compensation calculation means inputs the upper limit hold signal and the means for outputting the corresponding upper limit hold signal or lower limit hold signal when the active power signal reaches the variable speed operation limit range. Then, a limiter is provided to limit the Δf signal to be equal to or lower than the upper limit value to be the compensation signal, and to limit the Δf signal to be equal to or higher than the lower limit value to be the compensation signal when the lower limit hold signal is input. Is characterized by.

[0033]

[0034]

[0035]

[0036]

[0037]

[0038]

[0039]

[0040]

[0041]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the first to fifth embodiments of the present invention.
FIG. 20 is a configuration diagram of a variable speed pumped storage hydropower system applied to the embodiment. The main point in FIG. 1 different from FIG. 19 showing a conventional example is that Δf is present between the Δf detection means 11 and the governor-free compensation calculation means 12. A signal correcting means 22 is additionally provided, and it is determined based on the actual rotation speed signal Nr or the slip S whether or not it is within the operable range, and the deviation of the actual rotation speed signal Nr or the slip S from the operable range is prevented. That is, the data is output to the governor-free compensation calculation means 12.

FIG. 2 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus 10A according to the first embodiment of the present invention. The Δf signal correction means 22A is a comparison means 2.
3, variable speed upper limit signal output means 24, variable speed lower limit signal output means 25, zero signal output means 26, and switching means 27.

Here, the comparing means 23 takes in the actual rotation speed signal Nr or the slip S, and sets the variable speed upper limit signal output means 24 of the variable speed upper limit signal output means 24 for defining a predetermined boundary range inside the operable variable speed range. When the actual rotation speed signal Nr or the slip S reaches the variable speed upper limit signal H or the variable speed lower limit signal L by comparing with the signal H and the variable speed lower limit signal L of the variable speed lower limit signal output means 25, respectively. It outputs a switching signal.

The switching means 27 receives the Δf signal and contacts 2
While outputting as it is as a Δf correction signal via 7b, when the switching signal is input from the comparison means 23, the zero signal from the zero signal output means 26 is output via the contact 27a.

With the above configuration, the operation will be described with reference to the operation diagram shown in FIG. 3. As shown in the upper part of the drawing, the actual rotation speed signal Nr changes with respect to the synchronous speed signal Ns, and the actual rotation speed is increased before time t1. The speed signal Nr is within the boundaries of the variable speed range upper limit signal H and the variable speed range lower limit signal L, which are the boundary ranges, and the Δf signal is directly transmitted via the contact point 27b of the switching means 27 as the Δf correction signal to the governor-free compensation calculation means 12 Is output to. In this case, the system frequency is controlled to be the reference frequency signal as described in the related art.

After that, at time t1, the actual rotation speed signal Nr reaches the lower limit side of the variable speed range lower limit signal L. At this time, the switching signal is output from the comparison means 23 to the switching means 27, the contact 27b is opened and the contact 27a is closed, and as a result, the zero signal is output from the zero signal output means 26 as the Δf correction signal and the governor-free compensation calculation means 12 is obtained. Is output to. As a result, it is possible to prevent each compensation signal from the governor-free compensation calculation means 12 from being output as zero and the actual rotation speed signal Nr from deviating from the operable boundary range.

Further, at time t2, the actual rotation speed signal Nr falls within the range between the variable speed range lower limit signal L and the variable speed range upper limit signal H, and the Δf signal remains as Δf through the contact 27b.
It is output as a correction signal. Then, at time t3, the actual rotation speed signal Nr reaches the variable speed range upper limit signal H.
In this case, the comparison unit 23 outputs a switching signal to the switching unit 27, the contact 27a is closed, and the zero signal output unit 2 is again provided.
A zero signal is output from 6 as the Δf correction signal via the contact 27a.

In the governor-free compensation calculation means 12 to which the zero signal is input, each compensation signal is output as zero, and it is possible to prevent the actual rotation speed signal Nr from deviating from the operable boundary range. As a result, at time t4, the actual rotation speed signal Nr becomes equal to or lower than the variable speed range upper limit signal H again.

As described above, according to the first embodiment of the present invention, when the actual rotation speed signal Nr reaches the boundary range of the variable speed range upper limit signal H or the variable speed range lower limit signal L, the Δf signal is set to zero. Since the output is output to the governor-free compensation calculation means 12, it is possible to prevent the actual rotation speed signal Nr from deviating from the operable boundary range, and to prevent the active power and the actual rotation speed signal Nr from becoming unstable. You can

FIG. 4 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the second embodiment of the present invention. The Δf signal correction means 22B is a comparison means 23 and a variable speed upper limit. The signal output means 24, the variable speed lower limit signal output means 25, the zero signal output means 26, the switching means 27, and the rate limiter 28 are provided, and the feature is that the rate limiter 28 is provided.

The rate limiter 28 outputs the Δf signal or the zero signal from the switching means 27 to the governor-free compensation calculation means 12 while limiting the Δf signal or the zero signal at a predetermined change rate.

With the above configuration, the operation will be described with reference to the operation diagram shown in FIG. 5. As shown in the upper part of the figure, the actual rotation speed signal Nr changes with respect to the synchronous speed signal Ns, and the actual rotation speed is increased before time t1. The speed signal Nr is within the range of the variable speed range upper limit signal H and the variable speed range lower limit signal L, and the Δf signal is the switching means 2.
It is directly output to the governor-free compensation calculation means 12 as the Δf correction signal via the contact 27b of No. 7.

Thereafter, at time t1, the actual rotation speed signal Nr reaches the lower limit side of the variable speed range lower limit signal L. At this time, the switching signal is output from the comparison means 23 to the switching means 27, the contact 27b is opened and the contact 27a is closed, and as a result, the zero signal is outputted from the zero signal output means 26 as the Δf correction signal via the contact 27a. It is output to the limiter 28.

The rate limiter 28 outputs a Δf correction signal for gradually shifting the Δf signal at time t1 to a zero signal as shown in the figure. Further, similarly, at time t2 and time t
3. At time t4, the rate limiter 28 operates to output the Δf correction signal with a predetermined change rate.

FIG. 6 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the third embodiment of the present invention. The Δf signal correction means 22C is a variable gain calculation means 30 and a multiplication means. It is composed of 31 and.

Here, the variable gain calculation means 30 makes zero outside the variable speed upper and lower limits (points A and B) with respect to the actual rotation speed signal Nr or the slip S, and gradually increases to gain 1 when going inward. The function is set so that a gain signal having a gain of 1 is output when the position approaches (points C and D). The multiplying means 31 outputs a Δf correction signal obtained by multiplying the Δf signal by the gain signal from the variable gain computing means 30.

With the above configuration, first, referring to FIG. 7, the actual rotation speed signal Nr or the slip S is taken into the variable gain calculation means 30, and before the time t1, the actual rotation speed signal Nr is D. The gain signal 1 that is larger than the value of the point is output from the variable gain calculation means 30. The gain signal 1 is multiplied by the Δf signal by the multiplication means 31 and output as a Δf correction signal. Thereafter, at time t1, the actual rotation speed signal Nr becomes equal to or lower than the value at the point D, the function is set, the gain signal is input to the multiplication means 31, and the gain signal is multiplied by the Δf signal and output as the Δf correction signal.

Next, at time t2, the actual rotation speed signal Nr becomes equal to or less than the value at the point B, the variable gain calculation means 30 outputs the gain signal 0, and the multiplication means 31 outputs the Δf correction signal 0. . Eventually, when the actual rotation speed signal Nr rises to reach the value at point B at time t3, the gain signal from the variable gain calculation means 30 is output so as to gradually increase from 0, and the Δf correction signal from the multiplication means 31 is output. Gradually increases from 0. When the actual rotation speed signal Nr reaches the value at the point D at time t4, the gain signal 1 is output from the variable gain computing means 30, and the Δf signal is output from the multiplying means 31 as the Δf correction signal. In addition, C point on the upper limit side,
The same applies to point A.

As described above, according to the third embodiment, when the actual rotation speed signal Nr reaches the boundary range, the Δf correction signal is output as zero, while the actual rotation speed signal Nr is a predetermined value inside the boundary range. In the range, the Δf correction signal is gradually increased from zero, and the actual rotation speed signal Nr is changed to the synchronous speed signal N.
In the range close to s, the Δf signal is output as it is as the Δf correction signal. Therefore, the Δf correction signal can be stably changed without sudden change, and further, it does not deviate from the operable variable speed range.

FIG. 8 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the fourth embodiment of the present invention. The Δf signal correction means 22D is the upper limit comparison means 32.
And variable speed upper limit signal output means 33, Δf upper limit signal output means 34, zero signal output means 35 and upper limit side switching means 36, and further lower limit comparison means 37, variable speed lower limit signal output means 38 and Δf lower limit. It comprises a signal output means 39, a zero signal output means 40, a lower limit side switching means 41 and a limiter 42.

The upper limit comparing means 32 outputs a switching signal when the actual rotation speed signal Nr becomes the variable speed upper limit signal H from the variable speed upper limit signal output means 33. The upper limit switching means 36 includes the Δf upper limit signal output means 34.
The limiter 42 using the Δf upper limit signal from
On the other hand, when the switching signal is input, the zero signal output means 35 sets the zero signal in the limiter 42 as the upper limit.

The lower limit comparing means 37 determines the actual rotation speed signal Nr.
When the variable speed lower limit signal output means 38 becomes the variable speed lower limit signal L, a switching signal is output. The lower limit side switching means 41 uses the Δ from the Δf lower limit signal output means 39.
While the f lower limit signal is set in the limiter 42 as the lower limit, when the switching signal is input, the zero signal output unit 40 sets the zero signal in the limiter 42 as the lower limit.

The limiter 42 outputs the Δf signal as it is as a Δf correction signal when the Δf signal is within the range between the upper limit and the lower limit. It is limited and outputs the Δf correction signal.

With the above configuration, referring to FIG. 9, when the actual rotation speed signal Nr becomes the variable speed range lower limit signal L at time t1, a switching signal is output from the lower limit comparison means 37 to the lower limit side switching means 41. To be done. In this case, the contact 41a of the lower limit switching means 41 is closed, and the zero signal from the zero signal output means 40 is set in the limiter 42 as the lower limit. As a result, the Δf signal is limited by the limiter 42, and when the Δf signal is less than or equal to zero, a zero signal is output and Δf
When the signal is 0 or more, the Δf correction signal is output as it is.

After that, when the actual rotation speed signal Nr becomes the variable speed range lower limit signal L at time t2, the output of the switching signal from the lower limit comparison means 37 is stopped, and the Δf lower limit signal is sent to the limiter 42 via the contact 41b. Is set as.
As a result, the Δf signal is directly transmitted through the limiter 42 by Δ.
It is output as an f correction signal.

Further, when the actual rotation speed signal Nr becomes the variable speed upper limit signal H at the time t3, the upper limit comparing means 32 outputs the switching signal to the upper limit side switching means 36. In this case, the zero signal is set to the upper limit of the limiter 42 via the contact 36a of the upper limit switching means 36. As a result, the upper limit of the Δf signal is limited to zero by the limiter 42 and a Δf correction signal of zero is output, while the Δf signal is output as it is when the Δf signal is zero or less. At time t4 thereafter, the actual rotation speed signal Nr becomes equal to or less than the variable speed range upper limit signal H, and the Δf signal is output as it is as the Δf correction signal.

As described above, according to the fourth embodiment of the present invention, when the actual rotation speed signal Nr reaches the upper limit of the boundary range, only the upper limit limiter is set to zero, so that the Δf signal becomes zero or less. Is not limited to zero, and when the actual rotation speed signal Nr reaches the lower limit of the boundary range, only the lower limit limiter is set to zero, so that the Δf signal becomes zero even if the Δf signal becomes zero or more. Not limited. As described above, the actual rotation speed signal Nr does not fall outside the operable boundary range.

FIG. 10 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the fifth embodiment of the present invention. The Δf signal correction means 22E is the upper limit comparison means 4
5, variable speed upper limit signal output means 46, upper limit holding means 47, lower limit comparison means 48 and variable speed lower limit signal output means 4
9, lower limit holding means 50 and limit means 51.

Here, the upper limit comparison means 45 outputs an upper limit hold signal to the upper limit hold means 47 when the actual rotation speed signal Nr is equal to or higher than the variable speed range upper limit signal H from the variable speed range upper limit signal output means 46. is there. Lower limit comparison means 48
Means that the actual rotation speed signal Nr is a variable speed range lower limit signal output means 4
When the variable speed range lower limit signal L from 9 is less than or equal to the variable speed limit lower limit signal L, the lower limit hold signal is output to the lower limit hold means 50. The limit means 51 holds and outputs the Δf signal at the upper limit value when the upper limit hold means 47 is held, and holds and outputs the Δf signal at the lower limit value when the lower limit hold means 50 is held. Is.

With the above-mentioned configuration, referring to FIG. 11, the actual rotation speed signal Nr becomes the variable speed lower limit signal L at time t1, and the lower limit comparison means 48 outputs the hold signal to the lower limit hold means 50. . In this case, the lower limit holding means 50 sets the lower limit of the limit means 51, the Δf signal is limited to the lower limit, and Δf
The correction signal is output.

After that, when the actual rotation speed signal Nr becomes the variable speed range lower limit signal L at time t2, the output of the hold signal is stopped, and the Δf signal is output as it is as the Δf correction signal via the limit means 51. Then, when the actual rotation speed signal Nr becomes the variable speed range upper limit signal H at the time t3, the hold signal from the upper limit comparison means 45 becomes the upper limit hold means 47.
Is output to. In this case, the Δf signal is the limit means 5
It is limited to the upper limit value of 1 and is output as a Δf correction signal.

Further, when the actual rotation speed signal Nr becomes the variable speed upper limit signal H at time t4, the output of the hold signal from the upper limit comparison means 45 is stopped, and the Δf signal is directly passed through the limit means 51 as the Δf correction signal. Is output.

As described above, according to the fifth embodiment, the Δf correction signal is not uniformly set to zero when the actual rotation speed signal Nr reaches the boundary range, but can be held at the Δf signal at the time of arrival. .

FIG. 12 is a configuration diagram of a variable speed pumped storage hydropower generation system applied to the sixth to tenth embodiments of the present invention. In FIG. 12, main points different from FIG. 19 showing a conventional example. Is based on the Δf signal correction means 22F, the active power detection means 52, and the active power signal Pb between the Δf detection means 11 and the governor-free compensation calculation means 12, and determines whether it is within the operable range or not. That is, Pb is output to the governor-free compensation calculation means 12 so as to prevent the deviation from the operable range.

FIG. 13 is a block diagram of the Δf signal correction means provided in the variable speed generator / motor 10B according to the sixth embodiment of the present invention. The Δf signal correction means 22F includes a comparison means 23a and an active power upper limit. It comprises a signal output means 24a, an active power lower limit signal output means 25a, a zero signal output means 26 and a switching means 27.

Here, the comparison means 23a takes in the active power signal Pb and outputs the active power upper limit signal H and the active power lower limit signal output of the active power upper limit signal output means 24a which is a predetermined boundary range inside the operable range. The active power signal Pb is compared with the active power lower limit signal L of the means 25a.
Is to output a switching signal when the active power upper limit signal H and the active power lower limit signal L are exceeded.

The switching means 27 takes in the Δf signal and contacts 2
While outputting as it is as the Δf correction signal via 7b, when the switching signal is input from the comparing means 23a, the zero signal from the zero signal outputting means 26 is output via the contact 27a.

With the above configuration, the operation will be described with reference to the operation diagram shown in FIG. 14. As shown in the upper part of the figure, the active power signal Pb before the time t1 is the active power upper limit signal H which is the boundary range.
And within the range of the active power lower limit signal L, the Δf signal is directly output to the governor-free compensation calculation means 12 via the contact 27b of the switching means 27 as a Δf correction signal. In this case, the system frequency is controlled to be the reference frequency signal as described in the related art.

After that, at time t1, the active power signal Pb reaches the active power lower limit signal L. At this time, the switching signal is output from the comparison means 23a to the switching means 27, the contact 27b is opened and the contact 27a is closed, and as a result, the zero signal is outputted from the zero signal output means 26 as the Δf correction signal to the governor-free compensation calculation means 12. Is output to. As a result, it is possible to prevent each compensation signal from the governor-free compensation calculation means 12 from being output as zero and the active power signal Pb from deviating from the operable range.

Further, at the time t2, the active power signal Pb falls within the range of the active power lower limit signal L and the active power upper limit signal H, and the Δf signal is directly output as the Δf correction signal via the contact 27b. Then, at time t3, the active power signal Pb reaches the active power upper limit signal H. In this case, the switching signal is output from the comparison means 23a to the switching means 27, the contact 27a is closed, and the zero signal output means 26 is opened again.
Is output as a Δf correction signal from the contact 27a.

In the governor-free compensation calculation means 12 to which the zero signal is input, each compensation signal is output as zero, and it is possible to prevent the active power signal Pb from deviating from the operable range. As a result, at time t4, the active power signal Pb is again generated.
Becomes the active power upper limit signal H.

As described above, according to the sixth embodiment of the present invention, when the active power signal Pb reaches the boundary range of the active power upper limit signal H or the active power lower limit signal L, the Δf signal is set to zero and the governor-free compensation is performed. Since the active power signal Pb is output to the calculating means 12, it is possible to prevent the active power signal Pb from deviating from the operable range, and to prevent the active power signal Pb from becoming unstable.

FIG. 15 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the seventh embodiment of the present invention. The Δf signal correction means 22G is a comparison means 23a.
And an active power upper limit signal output means 24a, an active power lower limit signal output means 25a, a zero signal output means 26, a switching means 27 and a rate limiter 28.
Is characterized by having.

Here, the rate limiter 28 limits the change rate by a predetermined rate when the Δf signal or the zero signal is input through the switching means 27, and the governor-free compensation calculating means 12
Is output to.

With the above configuration, when the active power signal Pb reaches the lower limit of the active power lower limit signal L, the comparison means 23a outputs the switching signal to the switching means 27, the contact 27b is opened and the contact 27a is closed. As a result, the zero signal output means 26 outputs a zero signal as a Δf correction signal to the rate limiter 28 via the contact 27a.

The rate limiter 28 outputs a Δf correction signal for gradually shifting from the Δf signal to the zero signal. In this way, the action of the rate limiter 28 outputs the Δf correction signal at a predetermined change rate. As a result, compared to the sixth embodiment, the Δf correction signal can be changed stably without sudden fluctuation.

FIG. 16 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the eighth embodiment of the present invention. The Δf signal correction means 22H is a variable gain calculation means 30a and a multiplication means. It is composed of 31 and.

Here, the variable gain computing means 30a makes zero outside the active power signal Pb outside the active power upper and lower limits (points A and B), but gradually approaches the gain 1 when going inward (C , D point), the function is set so that a gain signal having a gain of 1 is output. The multiplication means 31
The Δf signal is output by multiplying the Δf signal by the gain signal from the variable gain calculation means 30a.

With the above configuration, when the active power signal Pb becomes equal to or less than the value at point D, the function signal is set and the gain signal is multiplied by the multiplication means 31.
The gain signal is multiplied by the Δf signal and output as a Δf correction signal. Furthermore, the active power signal Pb is B
When the value becomes equal to or less than the point value, the gain signal 0 is output from the variable gain calculation means 30a, and the Δf correction signal 0 is output from the multiplication means 31.
Is output. When the active power signal Pb rises and reaches a value equal to or higher than the point B, the gain signal is output so as to be gradually larger than 0, and the Δf correction signal from the multiplication means 31 gradually increases from 0. When the active power signal Pb reaches the value at the point D, the gain signal 1 is output and the multiplying means 31 outputs the Δf signal as the Δf correction signal. In addition, C on the upper limit side
The same applies to point and point A.

As described above, according to the eighth embodiment, when the active power signal Pb reaches the boundary range, the Δf correction signal is output as zero, while the active power signal Pb is within a predetermined range inside the boundary range. The Δf correction signal is gradually increased from zero, and the active power signal Pb is the active power command signal Pa.
In the range close to, the Δf signal is directly output as the Δf correction signal. Therefore, the Δf correction signal can be stably changed without sudden change, and further, it does not deviate from the operable range.

FIG. 17 is a block diagram of the Δf signal correcting means provided in the variable speed generator-motor apparatus according to the ninth embodiment of the present invention, wherein the Δf signal correcting means 22I is the upper limit comparing means 3
2a, active power upper limit signal output means 33a, Δf upper limit signal output means 34, zero signal output means 35, and upper limit side switching means 3
6 and further includes a lower limit comparison means 37a, an active power lower limit signal output means 38a, a Δf lower limit signal output means 39, a zero signal output means 40, a lower limit side switching means 41, and a limiter 42.
It consists of and.

Here, the upper limit comparison means 32a outputs a switching signal when the active power signal Pb becomes the active power upper limit signal H from the active power upper limit signal output means 33a. The upper limit switching means 36 includes the Δf upper limit signal output means 34.
The limiter 42 using the Δf upper limit signal from
On the other hand, when the switching signal is input, the zero signal output means 35 sets the zero signal in the limiter 42 as the upper limit.

The lower limit comparing means 37a detects the active power signal Pb.
Is the active power lower limit signal L from the active power lower limit signal output means 38a, a switching signal is output. The lower limit side switching means 41 uses the Δ from the Δf lower limit signal output means 39.
While the f lower limit signal is set in the limiter 42 as the lower limit, when the switching signal is input, the zero signal output unit 40 sets the zero signal in the limiter 42 as the lower limit.

The limiter 42 outputs the Δf signal as it is as a Δf correction signal when the Δf signal is within the range between the upper limit and the lower limit. It is limited and outputs the Δf correction signal.

With the above configuration, when the active power signal Pb becomes the active power lower limit signal L, the lower limit comparing means 37a outputs a switching signal to the lower limit side switching means 41. In this case, the contact 41a of the lower limit switching means 41 is closed, and the zero signal from the zero signal output means 40 is set in the limiter 42 as the lower limit. As a result, the Δf signal is limited by the limiter 42, the zero signal is output when the Δf signal is zero or less, and the Δf correction signal is output as it is when the Δf signal is zero or more.

When the active power signal Pb becomes the active power lower limit signal L, the output of the switching signal from the lower limit comparison means 37a is stopped, and the Δf lower limit signal is output to the limiter 42 via the contact 41b.
Is set as the lower limit. As a result, the Δf signal is directly output as the Δf correction signal via the limiter 42.

When the active power signal Pb becomes the active power upper limit signal H, a switching signal is output from the upper limit comparison means 32a to the upper limit side switching means 36. In this case, the upper limit switching means 3
The zero signal is set to the upper limit of the limiter 42 via the contact 36a of No. 6. As a result, the upper limit of the Δf signal is limited to zero by the limiter 42 and a Δf correction signal of zero is output, while the Δf signal is output as it is when the Δf signal is zero or less.

As described above, according to the ninth embodiment of the present invention, when the active power signal Pb reaches the upper limit of the boundary range, only the upper limiter is set to zero. The active power signal Pb
When the lower limit of the boundary range is reached, the lower limit limiter is set to zero, so that the active power signal Pb does not fall outside the operable range.

FIG. 18 is a block diagram of the Δf signal correcting means provided in the variable speed generator-motor apparatus according to the tenth embodiment of the present invention. The Δf signal correcting means 22J includes an upper limit comparing means 45a and an active power upper limit. Signal output means 46a, upper limit hold means 47, lower limit comparison means 48a, active power lower limit signal output means 49a, lower limit hold means 50 and limit means 5
It is composed of 1.

The upper limit comparing means 45a outputs an upper limit hold signal to the upper limit holding means 47 when the active power signal Pb becomes the active power upper limit signal H. The lower limit comparing means 48a outputs a lower limit hold signal to the lower limit holding means 50 when the active power signal Pb becomes the active power lower limit signal L. The limit means 51 holds and outputs the Δf signal at the upper limit value when the upper limit hold means 47 is held, while the lower limit hold means 5 is held.
When 0 is held, the Δf signal is held and output at the lower limit value.

With the above configuration, when the active power signal Pb becomes the active power lower limit signal L, the lower limit comparison means 48a outputs a hold signal to the lower limit hold means 50. In this case, the lower limit holding means 50 sets the lower limit of the limit means 51, limits the Δf signal to the lower limit, and outputs the Δf correction signal.

When the active power signal Pb becomes the active power lower limit signal L, the output of the hold signal is stopped, and the Δf signal is directly output as the Δf correction signal via the limit means 51. When the active power signal Pb becomes the active power upper limit signal H, the upper limit comparison means 45 outputs a hold signal to the upper limit hold means 47. In this case, the Δf signal is limited to the upper limit value of the limit means 51,
It is output as a Δf correction signal.

As described above, according to the tenth embodiment, when the active power signal Pb reaches the boundary range, the Δf correction signal is not uniformly set to zero but is held at a predetermined value. Pb can be quickly returned to the boundary range and can be brought close to the system frequency.

[0105]

According to the first aspect of the present invention, the compensation signal is limited at a predetermined change rate, so that the compensation signal changes smoothly and the slip can be stably changed without sudden change.

According to the invention of claim 2, since the variable gain is set in the vicinity of the variable speed operation limit range, the compensation signal does not suddenly change and the compensation signal is smoothly increased / decreased to quickly and normally slip. can do.

According to the third aspect of the present invention, since only one of the limiters is set to zero, the slip can be quickly restored.

According to the invention of claim 4, since only one of the limiters is set to a predetermined value, the slip can be quickly restored.

According to the fifth aspect of the present invention, the compensation signal is limited at a predetermined rate of change, so that the actual rotation speed signal can be stably changed without changing suddenly.

According to the sixth aspect of the invention, since the variable gain is set in the vicinity of the variable speed operation limit range, the compensation signal does not change suddenly, and the compensation signal is smoothly increased or decreased to speed up the actual rotation speed signal. Can be normal.

According to the invention of claim 7, since only one of the limiters is set to zero, the actual rotation speed signal can be quickly returned.

According to the invention of claim 8, only one of the limiters is set to a predetermined value, so that the actual rotation speed signal can be quickly returned.

According to the ninth aspect of the present invention, when the active power reaches the variable speed operation limit range, the predetermined compensation signal is the slip control means, the guide vane control means, the function generation means,
Since the AC power is output to any one of the AC excitation control means, it is possible to prevent the active power from deviating from the variable speed operation limit range, and to prevent the active power from becoming unstable.

According to the tenth aspect of the present invention, when the active power reaches the variable speed operation limit range, the predetermined compensation signal is the speed control means, the guide vane control means, the function generation means,
Since the AC power is output to any one of the AC excitation control means, it is possible to prevent the active power from deviating from the variable speed operation limit range, and to prevent the active power from becoming unstable.

[0115]

[0116]

[0117]

[0118]

[0119]

[0120]

[0121]

[0122]

According to the eleventh aspect of the present invention, since the compensation signal is limited at a predetermined change rate, the active power signal can be stably changed without changing suddenly.

According to the twelfth aspect of the present invention, since the variable gain is set in the vicinity of the variable speed operation limit range, the compensation signal does not change suddenly and the compensation signal is smoothly increased or decreased to quickly output the active power signal. Can be normal.

According to the thirteenth aspect of the present invention, since only one of the limiters is set to zero, the active power signal can be quickly returned.

According to the fourteenth aspect of the present invention, since only one of the limiters is set to the predetermined value, the active power signal can be quickly returned.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a variable speed generator-motor apparatus showing a first embodiment to a fifth embodiment of the present invention.

FIG. 2 is a configuration diagram of Δf signal correction means according to the first embodiment of the present invention.

FIG. 3 is a time chart showing the operation of FIG.

FIG. 4 is a configuration diagram of Δf signal correction means according to a second embodiment of the present invention.

FIG. 5 is a time chart showing the operation of FIG.

FIG. 6 is a configuration diagram of Δf signal correction means according to a third embodiment of the present invention.

FIG. 7 is a time chart showing the operation of FIG.

FIG. 8 is a configuration diagram of Δf signal correction means according to a fourth embodiment of the present invention.

9 is a time chart showing the operation of FIG.

FIG. 10 is a configuration diagram of Δf signal correction means according to a fifth embodiment of the present invention.

11 is a time chart showing the operation of FIG.

FIG. 12 is a configuration diagram of a variable speed generator-motor apparatus showing sixth to tenth embodiments of the present invention.

FIG. 13 is a configuration diagram of Δf signal correction means according to a sixth embodiment of the present invention.

FIG. 14 is a time chart showing the operation of FIG.

FIG. 15 is a configuration diagram of Δf signal correction means according to a seventh embodiment of the present invention.

FIG. 16 is a configuration diagram of Δf signal correction means according to an eighth embodiment of the present invention.

FIG. 17 is a configuration diagram of Δf signal correction means according to a ninth embodiment of the present invention.

FIG. 18 is a configuration diagram of Δf signal correction means showing a tenth embodiment of the present invention.

FIG. 19 is a configuration diagram showing a conventional variable speed generator-motor device.

FIG. 20 is an explanatory diagram showing a range of active power that can be operated during power generation in FIG. 19;

FIG. 21 is an explanatory diagram showing a range of active power that can be operated during pumping of FIG.

FIG. 22 is a configuration diagram of a governor-free compensation calculation means.

[Explanation of symbols]

1 generator motor 1a Stator winding 1b Rotor winding 6 frequency converter 7 Velocity slip detector 8 guide vanes 10 Variable speed generator / motor 11 Δf detection means 12 Governor-free compensation calculation means 14 High efficiency function / active power control means 17 Speed slip control means 19 Current control means 21 Guide vane control means 22A-22J Δf signal correction means 23 Comparison means 24, 33, 46 Variable speed upper limit signal output means 25, 38, 49 Variable speed range lower limit signal output means 27 switching means 28 Rate Limiter 30 variable gain calculation means 31 multiplication means 32,45 upper limit comparison means 36 Upper limit side switching means 41 Lower limit switching means 42 limiter 47 upper limit holding means 50 Lower limit hold means 51 Limit Means 52 Active power detection means

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02P 9/00-9/48

Claims (14)

(57) [Claims] 1. A winding type induction generator motor having a primary winding connected to an electric power system and a secondary winding AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus described above, slip detecting means for detecting slip of the AC excitation based on the frequency of the power system and actual rotation speed of the rotating shaft, and the wire wound induction power generation based on a frequency fluctuation signal of the power system. A compensation signal for approximating the primary frequency of the electric motor to a reference frequency is calculated and output, and the frequency fluctuation signal is shifted to a zero signal by limiting at a predetermined change rate, while the slip is inside the variable speed operation limit range. When it goes into, the compensation signal for limiting the deviation from the zero signal to the frequency fluctuation signal by limiting it at the predetermined change rate to prevent the slip from deviating from the variable speed operation limit range is played. Compensation calculation means for outputting, function generation means for calculating and outputting a slip command and a guide vane command based on the active power command or the active power command corrected by the compensation signal and the head, the slip command and the slip or the slip command And a slip control means for calculating and outputting a torque current command based on the compensation signal and the slip, an AC excitation control means for controlling the AC excitation based on the torque current command or the torque current command and the compensation signal, and A variable speed generator-motor apparatus comprising: a guide vane command, or guide vane control means for controlling the guide vane based on the guide vane command and the compensation signal. 2. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus described above, slip detecting means for detecting slip of the AC excitation based on the frequency of the power system and actual rotation speed of the rotating shaft, and the wire wound induction power generation based on a frequency fluctuation signal of the power system. While outputting a compensation signal to bring the primary side frequency of the electric motor close to the reference frequency, inside the variable speed operation limit range of the slip, an inner boundary range is further provided.
When the slip reaches the variable speed operation limit range, the gain signal is output as zero, and when the slip is between the variable speed operation limit range and the inner boundary range, the gain signal is increased as it goes inward. And a variable gain calculating means for outputting a gain signal as 1 when the slip enters the inner boundary range, and a multiplication obtained by multiplying the frequency fluctuation signal by the gain signal as the compensation signal. Compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the slip from the variable speed operation limit range, and a slip command based on the active power command or the active power command corrected by the compensation signal and the head. And a function generating means for calculating and outputting a guide vane command, the slip command and the slip or the slip command, the compensation signal and the slip. A slip control means for calculating and outputting a torque current command, an AC excitation control means for controlling the AC excitation based on the torque current command or the torque current command and the compensation signal, and the guide vane command or the guide vane command. And a guide vane control unit that controls the guide vanes based on the compensation signal. 3. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotating shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus described above, slip detecting means for detecting slip of the AC excitation based on the frequency of the power system and actual rotation speed of the rotating shaft, and the wire wound induction power generation based on a frequency fluctuation signal of the power system. While outputting a compensation signal to bring the primary side frequency of the motor closer to the reference frequency, the upper limit and the lower limit are set to predetermined values when the slip is within the variable speed operation limit range, and the slip When the shift operation limit range is reached, setting means for setting the upper limit or the lower limit of the corresponding side to zero, and the frequency fluctuation signal When the frequency fluctuation signal is outside the range between the upper limit and the lower limit, the frequency fluctuation signal is output as a compensation signal when it is within the range between the limit and the lower limit, and is limited to the upper limit or the lower limit. A limiter that outputs a compensation signal and outputs a compensation signal, and a compensation calculation unit that calculates and outputs a compensation signal that prevents deviation of the slip from the variable speed operation limit range; and an active power command or active power corrected by the compensation signal. Function generating means for calculating and outputting a slip command and a guide vane command based on a command and a drop, a slip control means for calculating and outputting a torque current command based on the slip command and a slip or a slip command, a compensation signal and a slip, and the torque AC for controlling the AC excitation based on a current command or the torque current command and the compensation signal And 磁制 control means, said guide vanes command or the guide vane command variable speed generator-motor apparatus characterized by having a guide vane control means for controlling the guide vanes on the basis of said compensation signal. 4. A winding type induction generator motor in which a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus, a slip detecting means for detecting a slip of the AC excitation based on a frequency of the power system and an actual rotation speed of a rotating shaft, and an active power command or an active power command corrected by the compensation signal. And a function generating means for computing and outputting a slip command and a guide vane command based on the head, and a compensating signal for computing the primary side frequency of the wire wound induction generator motor close to a reference frequency based on a frequency fluctuation signal of the power system. On the other hand, when the slip reaches the variable speed operation limit range, means for outputting a corresponding upper limit hold signal or lower limit hold signal, When the limit hold signal is input, the Δf signal is limited so as to be less than or equal to the upper limit limit to be a compensation signal, while when the lower limit hold signal is input, the Δf signal is limited so as to be equal to or more than the lower limit limit value and becomes A limiter, and a compensation calculation means for calculating and outputting a compensation signal for preventing the slip from deviating from the variable speed operation limit range; and the slip command and the slip or the slip command and the correction signal and the slip. A slip control means for calculating and outputting a torque current command based on the above, an alternating current excitation control means for controlling the alternating current excitation based on the torque current command or the torque current command and the compensation signal, the guide vane command or the guide vane command, Variable speed power generation, comprising guide vane control means for controlling guide vanes based on the compensation signal. Electric device. 5. A winding type induction generator motor in which a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor apparatus according to the above, a speed detecting means for detecting an actual rotation speed of the rotating shaft, and a compensation for making the primary side frequency of the wire wound induction generator motor closer to a reference frequency based on a frequency fluctuation signal of the power system. On the other hand, while the signal is arithmetically output, when the actual rotation speed signal reaches the predetermined variable speed operation limit range, the frequency fluctuation signal is limited to a predetermined change rate to shift the frequency fluctuation signal to the zero signal, while the actual rotation speed signal is output. When the inside of the variable speed operation limit range is reached, it is limited at a predetermined rate of change to shift from the zero signal to the frequency fluctuation signal to prevent deviation of the actual rotation speed from the variable speed operation limit range. Compensation calculation means for calculating and outputting a compensation signal, and function generation means for calculating and outputting a speed command and a guide vane command based on the active power command and the head or based on the active power command and the head corrected by the compensation signal, A speed control means for calculating and outputting a torque current command based on the speed command, the compensation signal, and the actual rotation speed or based on the speed command and the actual rotation speed, and the alternating current based on the torque current command or based on the torque current command and the compensation signal. A variable speed generator-motor apparatus comprising: an alternating current excitation control means for controlling excitation; and a guide vane control means for controlling the guide vane based on a guide vane command or based on a guide vane command and a compensation signal. 6. A winding type induction generator motor in which a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor apparatus according to the above, a speed detecting means for detecting an actual rotation speed of the rotating shaft, and a compensation for making the primary side frequency of the wire wound induction generator motor closer to a reference frequency based on a frequency fluctuation signal of the power system. While outputting the signal by calculation, inside the variable speed operation limit range, an inner boundary range is further provided to output a gain signal as zero when the actual rotation speed signal reaches the variable speed operation limit range, When the actual rotation speed signal is between the variable speed operation limit range and the inner boundary range, the gain signal is increased and output as going inward, and the actual rotation speed signal is within the inner boundary range. A variable gain calculation means for outputting a gain signal as 1 when it enters, and a multiplication means for making a signal obtained by multiplying the frequency fluctuation signal by the gain signal the compensation signal, the variable speed operation of the actual rotation speed. Compensation calculation means for calculating and outputting a compensation signal for preventing deviation from the limit range, and calculation of speed command and guide vane command based on active power command and head or based on active power command and head corrected by compensation signal Function generating means for outputting, speed control means for calculating and outputting a torque current command based on the speed command, compensation signal, and actual rotation speed, or based on the speed command and actual rotation speed, and based on the torque current command or the torque current command And based on a guide vane command or a guide vane command and a compensating signal. Variable speed generator-motor apparatus characterized by having a guide vane control means for controlling the Idoben. 7. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor apparatus according to the above, a speed detecting means for detecting an actual rotation speed of the rotating shaft, and a compensation for making the primary side frequency of the wire wound induction generator motor closer to a reference frequency based on a frequency fluctuation signal of the power system. While calculating and outputting the signal, when the actual rotation speed signal is within the variable speed operation limit range, the upper limit and the lower limit are set to predetermined values, respectively, and the actual rotation speed signal reaches the variable speed operation limit range. At this time, the setting means for setting the upper limit or the lower limit of the corresponding side to zero, and the frequency fluctuation signal is in the range of the upper limit and the lower limit. When the frequency fluctuation signal is out of the range between the upper limit and the lower limit, the limiter is limited to the upper limit or the lower limit and outputs as a compensation signal when the frequency fluctuation signal is out of the range of the upper limit and the lower limit. Compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the actual rotation speed from the variable speed operation limit range, and an active power command and a head difference based on the active power command and the head or corrected by the compensation signal. A function generating means for calculating and outputting a speed command and a guide vane command based on, and a speed control means for calculating and outputting a torque current command based on the speed command, the compensation signal and the actual rotation speed or based on the speed command and the actual rotation speed. AC excitation control means for controlling the AC excitation based on a torque current command or based on a torque current command and a compensation signal, A variable speed generator-motor apparatus comprising: a guide vane control unit that controls the guide vanes based on an id vane command or based on a guide vane command and a compensation signal. 8. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor apparatus according to the above, a speed detecting means for detecting an actual rotation speed of the rotating shaft, and a compensation for making the primary side frequency of the wire wound induction generator motor closer to a reference frequency based on a frequency fluctuation signal of the power system. While outputting the signal, the means for outputting the upper limit hold signal or the lower limit hold signal of the corresponding side when the actual rotation speed signal reaches the variable speed operation limit range, and the Δf signal becomes the upper limit when the upper limit hold signal is input. While the compensation signal is limited to the limit value or less, the lower limit hold signal is input and the Δf signal is limited to be the lower limit value or more and compensated. A limiter which is a signal, and a compensating calculation means for calculating and outputting a compensating signal for preventing deviation of the actual rotation speed from the variable speed operation limit range, and an effective signal corrected based on the active power command and the head or by the compensation signal. Function generating means for calculating and outputting a speed command and a guide vane command based on an electric power command and a head, and a torque current command based on a speed command, a compensation signal, and an actual rotation speed, or a torque current command based on the speed command and an actual rotation speed. Control means for controlling the alternating current excitation based on the torque current command or based on the torque current command and the compensation signal, and the guide vane based on the guide vane command or based on the guide vane command and the compensation signal. Variable speed generator-motor device. 9. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus, a slip detecting means for detecting a slip of the AC excitation based on a frequency of the power system and an actual rotation speed of a rotating shaft, and an active power command or an active power command corrected by the compensation signal. And a function generating means for computing and outputting a slip command and a guide vane command based on the head, and a compensating signal for computing the primary side frequency of the wire wound induction generator motor close to a reference frequency based on a frequency fluctuation signal of the power system. However, while the frequency fluctuation signal is limited to a predetermined change rate to shift the frequency fluctuation signal to a zero signal, a predetermined value is obtained when the slip enters from the variable speed operation limit range. By changing the rate of change from the zero signal to the frequency fluctuation signal, a compensation signal for preventing deviation from the variable speed operation limit range of slippage is calculated and output, or based on the frequency fluctuation signal of the power system. While calculating and outputting a compensation signal for bringing the primary side frequency of the wound-rotor induction generator motor close to the reference frequency, when the active power supplied to the power system instead of the slip reaches the variable speed operation limit range, Compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the active power from the variable speed operation limit range, and a torque current command based on the slip command and the slip or the slip command and the correction signal and the slip. A slip control means for calculating and outputting, and an AC excitation for controlling the AC excitation based on the torque current command or the torque current command and the compensation signal. And control means, wherein the guide vane command or the guide vane command variable speed generator-motor apparatus characterized by having a guide vane control means for controlling the guide vanes on the basis of said compensation signal. 10. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor apparatus according to the above, a speed detecting means for detecting an actual rotation speed of the rotating shaft, and a compensation for making the primary side frequency of the wire wound induction generator motor closer to a reference frequency based on a frequency fluctuation signal of the power system. While the signal is calculated and output, when the actual rotation speed signal reaches the predetermined variable speed operation limit range, the frequency fluctuation signal is shifted to the zero signal while limiting the frequency change signal by a predetermined change rate, while the actual rotation speed signal is output. When it goes inward from the variable speed operation limit range, it is limited at a predetermined rate of change to shift from the zero signal to the frequency fluctuation signal, or the active power signal is set to the predetermined variable speed operation. When the limit range is reached, the frequency fluctuation signal is limited to a predetermined change rate to shift to a zero signal, while the active power signal is limited to a predetermined change rate when entering the variable speed operation limit range. Then, based on the active power command and the drop, compensation calculation means for shifting the zero signal to the frequency fluctuation signal to calculate and output a compensation signal for preventing deviation of the actual rotation speed from the variable speed operation limit range, or A function generating means for calculating and outputting a speed command and a guide vane command based on the active power command and the head corrected by the compensation signal, and based on the speed command, the compensation signal and the actual rotation speed, or the speed command and the actual rotation speed. A speed control means for calculating and outputting a torque current command based on the above; Variable speed generator-motor apparatus characterized by having a guide vane control means for controlling the guide vanes on the basis of the basis or guide vane command and the compensation signal to Idoben command. 11. The compensation calculation means, when the active power signal reaches a predetermined variable speed operation limit range,
While limiting the frequency fluctuation signal to a zero signal by limiting at a predetermined rate of change, when the active power signal enters inward from the variable speed operation limit range, limiting at a predetermined rate of change and changing from the zero signal to the zero signal. The variable speed generator-motor apparatus according to claim 9 or 10, characterized in that the variable speed generator-motor device is adapted to shift to a frequency fluctuation signal. 12. The compensation calculation means further provides an inner boundary range inside the variable speed operation limit range, and sets a gain signal to a zero signal when the active power signal reaches the variable speed operation limit range. On the other hand, when the active power signal is between the variable speed operation limit range and the inner boundary range, the gain signal is increased and output as it goes inward, and the active power signal enters the inner boundary range. 10. A variable gain calculation means for outputting a gain signal as 1 in this case, and a multiplication means for using a signal obtained by multiplying the frequency fluctuation signal by the gain signal as the compensation signal. Item 10. The variable speed generator-motor device according to Item 10. 13. The compensation calculation means sets an upper limit and a lower limit to predetermined values when the active power signal is within the variable speed operation limit range, while the active power signal is within the variable speed operation limit range. Setting means for setting the upper limit or the lower limit of the corresponding side to a zero signal when reaching, and the frequency fluctuation signal as a compensation signal when the frequency fluctuation signal is within the range of the upper limit and the lower limit 10. A limiter, which outputs the compensation signal when the frequency fluctuation signal is out of the range between the upper limit and the lower limit while being outputted, is output as a compensation signal. Alternatively, the variable speed generator-motor device according to claim 10. 14. The compensation calculation means outputs a corresponding upper limit hold signal or a lower limit hold signal when the active power signal reaches the variable speed operation limit range, and Δf when the upper limit hold signal is input. A limiter is provided to limit the signal to an upper limit value or less to be a compensation signal, while limiting the Δf signal to be a lower limit value or more to be a compensation signal when the lower limit hold signal is input. 11. The variable speed generator-motor device according to claim 9 or 10.